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000821MAN-01 (ISSUE 02) - RH-Series Two-Stage R410a

Contents

1. Page 17 Flushing amp Purging the Ground Loop nnns Page 17 Adding Antifreeze 11 18 ROREM 18 Pip NSU 18 STARTUP PROCEDURE cn 9 Page 20 Prestant 11 6 16 ne rns a Page 20 EC Page 21 TTE OS Page 22 GENERAL neu etas noram PAGE 23 TROUBLESHOOTING GUIDE uasa s a ems Le PAGE 24 Repair Page 33 Helfrigeratlon Circuit Diagrams BREF cas E RCM REA EEPER SENE Es Page 34 MODEL SPECIFIC INFORMA ded CU esl PAGE 3
2. 7 Domestic Hot Water Connections HACW only Page 8 SIZING AND DUCTWORK 10 Heat PUMP SIZING 10 8 10 D ct Systems Grill CAV 10 Thermostat Location PEE 11 Plenum Healer MERE 11 Condensate Drain _______ a eR Ebo dM Es be DN CI Page 11 DUCE SIZING GUIJO c Page 13 GROUND WATER SYSTEM INFORMATION sese nnus PAGE 14 General 5 Tn Page 14 PIUMDING ING Meal 14 X 14 Water Discharge 1005 14 GROUND LOOP SYSTEM INFORMATION PAGE 17 Circulator Pump Module rete
3. N IM T ui 32 0 38 0 gt Co Co co je N 52 N EC 44 0 CO 47 0 CO N D NO t iN O N EE EO RH 45 HACW P 1T coe ec Ware ata Wats C C 1 5 C Watts Watts Watts COPc C L s C C Watts 270 44 661 160 11 0 2 941 8 824 11 765 7416 14 4 23 9 0606 197 53 13 412 806 41 1 400 60 8 19 8 9 082 29 945 39 927 1614 69 150 1761 227 63 270 5 0 661 16 0 11 0 2 925 8 774 11 699 664 172 26 7 0606 22 5 53 13 463 270 5 6 661 16 1 10 9 2 905 8 715 11 619 6 18 20 0 29 4 0606 253 5 3 13 504 806 43 1 400 61 9 18 7 9 44 28 332 37 777 1 749 79 150 1 891 200 74 270 61 661 16 6 10 4 2 767 8 301 11 068 585 23 3 32 2 0 606 28 5 5 1 12 967 806 43 1400 624 182 9 91 27 573 36 763 11 869 84 150 2011 183 79 27 0 6 1 661 169 101 2 693 8 079 10772 5 36 26 1 35 0 0606 312 5 1 12 791 80 6 44 1 400 62 6 18 0 9 095 27 285 36 381 84 100 96 931 9 1 43 703 270 67 661 17 0 10 0 2 665 7 995 10659 499 28 9 378 0606 339 5 1 12 805 80 6 44 1 400 63 1 17 5 8 827 26 482 35 309 2 128 9 6 150
4. 10 8 6 0 10 7 5 9 10 6 9 9 10 5 2 10 4 10 3 2 N 10 3 5 7 90 856 26 621 89 824 26 318 88 765 26 008 88 523 25 937 87 336 25 589 86 130 25 236 86 189 25 253 49 7 0 20 2 Ext Static ISSUE 02 08 OCT 2010 CAPACITY RATINGS continued Heating Mode RH 80 HACW P 1S Nominal 6 ton Single Stage 410 60 Hz F BTU Hr Watts Watts F BTU Hr Watis C L s C C Watts 0 42 083 5 330 3 28 68 2 400 91 0 23 0 59 689 12 330 20 0 1 133 32 8 12 8 17 489 46 683 3 5 2 400 92 8 24 8 64 569 13 678 1 133 33 8 13 8 18 918 2 400 94 8 26 8 69 728 1 133 34 9 14 9 20 430 C C L min 15 16 8 16 8 1 1 6 2 O oh N O k i N 2 2 56 762 4 802 2 75 5 3 95 2 400 96 9 28 9 75 192 16 631 8 1 133 36 1 16 1 22 031 2 2 2 0 1 7 51 567 0 6 7 63 610 2 400 99 9 31 9 82 807 7 7 7 0 20 ES A N Co co 2 amp 7 18 638 4 1 33 37 7 17 7 24 262 76 041 5 192 7 2 400 104 8 36 8 95 754 22 280 7 1133 40 5 20 5
5. 51 Case Details Right Hand Return Size 55 75 0 8 sensa aenean Page 53 DRAWINGS 000970PDG Single Unit Connection to DHW Pre Heat Tank Brass Page 9 000822CDG Typical Duct and Condensate Connections Horizontal Case Page 12 000907CDG Typical Ground Water Installation for Size 25 75 Heat Pumps Brass FPT Page 15 000619INF Ground Water Disposal Methods Page 16 000906CDG Geo Flo Circulator Pump Module Installation Brass FPT Page 19 001207RCD Modular R H Series Refrigeration Circuit Diagram Heating Mode Page 34 001208RCD Modular R H Series Refrigeration Circuit Diagram Cooling Mode Page 35 000683SCH RH HAC P 1T DE Schematic Diagram Page 39 000684ELB RH HAC P 1T DEL Electrical Box Diagram Page 44 000685ELB RH HAC P 1T DER Electrical Box Diagram Page 45 ISSUE 02 08 OCT 2010 Page 5 000821MAN 01 Installation Information UNIT DESCRIPTION The RH Series unit is a high efficiency two stage geother mal heat pump with environmentally friendly R410a r
6. MARITIME GEOTHERMAL Installation and Service Manual NORDIC RH Series Horizontal Two Stage R410a Model Sizes 25 80 Horizontal Liquid to Geothermal Heat Pumps Maritime Geothermal Ltd P O Box 2555 Email info nordicghp com Web cghp com etitcodiac N B 42 6 4 Document Number 000821MAN 01 Ph 506 756 8135 N SAFETY PRECAUTIONS N WARNING Ensure all access panels are in place and properly secured before applying power to the unit Failure to do so may cause risk of electrical shock WARNING Before performing service or maintenance on the heat pump system ensure all power sources are DISCONNECTED Electrical shock can cause serious personal injury or death WARNING Heat pump systems contain refrigerant under high pressure and as such can be hazardous to work on Only qualified service personnel should install repair or service the heat pump CAUTION Safety glasses and work gloves should be worn at all times whenever a heat pump is serviced A fire extinguisher and proper ventilation should be present whenever brazing is performed CAUTION Venting refrigerant to atmosphere is illegal A proper refrigerant recovery system must be employed whenever repairs require removal of refrigerant from the heat pump MODEL NOMENCLATURE RH 65 HACW P 1 T C SDELF xx ER Revision 01 02 etc Series RH Horizontal Slim Line Active Cooling Liquid to Air Nominal Size F
7. ALL I It is expressly understood that unless a statement is specifically identified as a warranty statements made by Maritime Geothermal Ltd a corporation registered New Brunswick Canada MG or its representatives relating to MG s products whether oral written or contained in any sales literature catalogue or agreement are not express warranties and do not form a part of the basis of the bargain but are merely MG s opinion or commendation of MG s products EXCEPT AS SPECIFICALLY SET FORTH HEREIN THERE IS NO EXPRESS WARRANTY AS TO ANY OF MG S PRODUCTS MG MAKES NO WARRANTY AGAINST LATENT DEFECTS MG MAKES NO WARRANTY OF MERCHANTABILITY OF THE GOODS OR OF THE FITNESS OF THE GOODS FOR ANY PARTICULAR PURPOSE LIMITED EXPRESS RESIDENTIAL WARRANTY PARTS MG warrants its Residential Class products purchased and retained in the United States of America and Canada to be free from defects in material and workmanship under normal use and maintenance as follows 1 Air conditioning heating and or heat pump units built or sold by MG MG Units for five 5 years from the Warranty Inception Date as defined below 2 Thermostats auxiliary electric heaters and geothermal pumping modules built or sold by MG when installed with MG Units for five 5 years from the Warranty Inception Date as defined below 8 Sealed refrigerant circuit components of MG Units which components only include the compressor refriger
8. N I AB 6 2 ASJA 174 DA RH 25 HACW P 1T R410a 60 Hz CFM_ F F BLU Hr BTU Hr BTU Hr Watts Amps Watts F BTU Hr Lis Waits Watts Watts C 1 5 cm Watts 80 6 1 000 59 5 21 1 1 182 25 8 52 72 61 6 9 6 34 628 27 0 83 472 153 11 7 2 235 6 705 8 940 7 56 11 1 0 454 16 5 5 3 10 146 80 6 1 000 60 0 20 6 1 274 23 4 57 7 2 66 5 34 192 27 0 8 3 472 15 5 11 5 2 180 6 540 8 720 13 9 0 454 19 2 5 3 10 018 80 6 1 000 60 1 20 5 1 369 21 6 62 72 715 9 5 34 296 27 0 89 472 156 11 4 2 164 6 492 8 16 7 0 454 22 0 5 3 10 049 80 6 48 1 000 60 7 19 9 1 466 19 6 67 7 2 76 4 33 838 27 0 89 472 159 111 2 106 6318 8 424 5 75 19 4 0 454 24 7 5 2 9 914 80 6 49 1 000 61 8 1 492 18 2 71 7 2 80 0 9 0 32 327 27 0 9 4 472 16 5 10 5 1 990 5 970 7 959 21 7 0 454 26 7 5 0 9 472 80 6 49 1 000 62 3 18 3 1 592 7 2 84 9 31 875 27 0 9 4 472 16 9 10 1 24 4 0 454 29 4 9 339 80 6 50 1 000 62 6 18 0 6 6 72 899 8 9 31 908 27 0 10 0 472 17 0 10 0 27 2 0 454 32 1 4 9 9 349 80 6 50 1 000 63 1 17 5 1 809 13 9 86 72 947 8 7 31 452 27 0 10 0 472 17 3 97 1 847 5540 7 386 4 08 30 0 0 454 349 4 9
9. TXV gt OUTDOOR B OUT Evaporator Compressor Accumulator lt amp OUTDOOR IN ee 1 170 Plantation Rd BEDTHERMAL Drawing me Modular R H Series __ WF Refrigeration Circuit Diagram Heating 01 initial Release c GEDDES c GEDDES 25 JAN 10 Size Drawing Number REV SHEET A d B EV ECO IMPL BY APVD BY DATE A 001207RCD 01 1 of 1 000821MAN 01 Page 34 ISSUE 02 08 OCT 2010 A REFRIGERATION CIRCUIT DIAGRAMS continued Modular R H Series Refrigeration Circuit Cooling Mode Evaporator 111 22010 4 b 000 8 VM Fan MW II lt 11 lt o Y NOTE Sight 4 way valve is Low Pressure Glass oe in E _ Cut out 1 is mode Closed Loop DHW IN 4 way Low Pressure m vavle KN Cut out 2 Filter _ Open Loop Drier Service Port High DHW Pressure OUT Cut out Optional Desuperheater TXV p gt OUTDOOR Condenser Compressor Accumulator gt OUTDOOR IN AN 1 E Rd MARITIME GEQTHEAIMAL Um Drawing Name Modular R H Series Chris Geddes 25 ghui Geddes 715 Refrigeration Circuit Diagram Cooling Mode Size Drawing Number REV SHEET ECO IMPL BY APVD BY A 00120
10. 2 270 15 6 89 105 9 6 980 9 0 43 083 27 0 6 7 661 173 9 7 2 586 7 759 10346 456 31 7 40 6 0 606 36 7 5 0 12 623 Compressor ZPS30K4E PFV 37 3Pa 0 15inH20 Ext Static ISSUE 02 08 OCT 2010 Page 39 000821MAN 01 CAPACITY RATINGS continued Heating Mode RH 55 HACW P 1T Nominal 4 ton va e w Watts Watts C C L s C C Watts 26 5 4 5 28 831 12807 12 8 285 32 0 28 977 00 28 oso 41 9 6 1 37 095 3 079 13 9 285 47 3 3 432 58 0 3 586 Compressor ZPS40K4E PFV L s C C Watis 1700 67 5 195 35 48 7105 11700 892 212 99 090 40 6 802 31 8 11 8 11 442 7109 1700 929 249 45914 42 8 802 33 9 13 9 13 453 113 1 700 96 3 28 3 52 095 45 0 802 35 7 15 7 15 264 0 808 370 170 16463 47 2 802 38 3 37 3Pa 01520 Ext Static 3 056 3 126 3 196 3 358 3 508 o 20 0 RH 55 HACW P 1T R410a 60 Hz F F CEM BIU Hr BIU Hr BTU Hr USGPM F BIU Hr C 80 6 27 0 80 6 27 0 80 6 27 0 80 6 27 0 80 6 27 0 80 6 27 0 80 6 27 0 80 6 27 0 45 7 2 45 7 2 46 7 8 46 7 8 47 8 3
11. 28 056 9 9 82 869 5 263 2 75 5 2 400 107 6 39 6 102 826 10 0 11 151 55 24 280 20 8 1 133 42 0 22 0 30 128 Compressor ZP7OKWE PFV 49 7 0 20inH20 Ext Static 4 6 69 630 15 118 4 2 400 102 3 34 3 89 090 6 8 1 1 5 20 401 6 1 133 39 0 19 0 26 103 1 Oi Oo RH 80 HACW P 1S R410a 60 Hz oF oF BTU Hr Watts Watts Watts EER BTU Hr C C L s C Watts Watts Watts L min C Watts eRe U zu N 270 7 2 1 133 13 4 13 6 6 237 18 710 24 946 484 156 294 1 060 224 6 8 30 155 270 7 8 1 133 13 6 13 4 6 126 18 377 24 503 1 7 35 0 1 060 28 5 6 8 30 033 27 0 7 8 1433 143 12 7 5 793 17 378 23171 7 2 40 6 1 060 33 8 6 6 29 306 80 6 47 2 400 58 0 22 6 19 540 58 619 78 159 5 582 22 2 880 6 432 110 16 8 97 9 11 9 100 215 Compressor ZP70KWE PFV 49 7Pa 0 20inH20 Ext Static ISSUE 02 08 OCT 2010 Page 43 000821MAN 01 ELECTRICAL TABLES Table 18 Heat Pump Electrical Information 230 1 60 Outdoor Max Fuse Wire 30 3 50 6 3 60 60 60 1 4 4 0 18 7 18 6 4 0 26 9 23 6 5 0 33 4 6 3 65 28 6 39 9 47 1 75 30 4 i 42 7 50 3
12. 6 ISSUE 02 08 OCT 2010 TABLE 8 Duct Sizing Guide external static of 0 20 20 gt lt gt lt 6 5 x 6 5 8x8 8x8 8 5 x 8 5 8 5 x 8 5 9 5 9 5 11 11 11 11 12 14 12 14 15 15 15 15 16 17 16 17 18 19 18 19 20 20 20 20 22 22 22 22 24 x 24 26 26 26 26 28 28 28 28 30 30 30 30 30 32 30 32 i Diameter Duct Area Rectangular Equivalents in 680 3954 4 8x22 9x19 10x17 11 15 95 154 1 8x22 9x19 10x17 11x15 1325 201 16 8x30 10x22 12x18 14x16 150 2001 16 8x30 10x22 12x18 14x16 1750 254 18 8x40 10x30 12x24 14x20 2000 254 18 8x40 10x30 12x24 14x20 2250 20 10x38 12x30 14x26 16x22 2600 20 10x38 12x30 14x26 16x22 2900 22 i12x36 14x30 16x26 18x23 3400 22 12 36 14x30 16x26 18x23 3600 452 24 x38 16x32 18x28 20x25 4800 452 24 14 38 16x32 18x28 20x25 5250 531 26 16x38 18x32 20x30 22x24 6125 66 28 18x38 20x34 22x30 24x28 6500 28 18x38 20x34 22x30 24x28 7250 77 30 20x40 22x38 24x32 26x30 707 30 20x40 22x38 24x32 26x30 804 32 22x40 24x38 26x34 28x32 9200 804 32 22x40 24x38 26x34 28x32 9800 98 34 24 42 25x40 26x38 28x34 908 34 25x40 26x38 28x3
13. All leads to the grills should be 6 in diameter 28sq in each The main hot air trunks should be at least 75 of the square surface area of leads being fed at any given point 4 Return air grills should have a minimum of the same total square surface area as the total of the supply grills 5 The square surface area of the return trunks should equal the square surface area of the grills being handled at any given point along the trunk Ohm 15 VERY IMPORTANT that all turns in both the supply trunks and the return trunks be made with TURNING RADII Air acts like a fluid and pressure drop is increased when air is forced to change direction rapidly around a sharp or irregular corner It is recommended that flexible collars be used to connect the main trunks to the heat pump This helps prevent any vibrations from travelling down the ductwork If a plenum heater is in stalled the collar should be at least 12 away from the heater elements The first 5 10 feet of the main supply trunks should be insu lated with acoustical duct insulation to further inhibit any noise from the unit from travelling down the ductwork If a plenum heater is installed insulation should not be placed within 12 of the heater elements Drawing 000822CDG shows a typical installation ISSUE 02 08 OCT 2010 DUCT SYSTEMS GRILL LAYOUT Most forced air heating systems in homes have the floor grills placed around the perimeter of the room to b
14. Faulty run capacitor Single phase only Loose or faulty wiring Check value with capacitance meter Should match label on capacitor Compressor will hum while trying to start and then trip its overload Check all compressor wiring includ ing inside compressor electrical box Replace if faulty Fix any loose connections Re place any damaged wires Faulty compressor contactor Voltage on line side with contactor held closed but no voltage on one or both terminals on the load side Points pitted or burned Or 24VAC across coil but contactor will not engage Replace contactor Thermal overload on compressor tripped Ohmmeter shows reading when placed across R and S terminals and infinity between C or C S A valid resistance reading is present again after the compressor has cooled down Proceed to Operation Trouble shooting to determine the cause of the thermal overload trip Burned out motor open winding Burned out motor shorted windings Motor shorted to ground Remove wires from compressor Ohmmeter shows infinite resistance between any two terminals Note Be sure compressor overload has had a chance to reset If compressor is hot this may take several hours Remove wires from compressor Resistance between any two termi nals is below the specified value Remove wires from compressor Check for infinite resistance be tween each terminal and ground Replace
15. 14 5 12 5 4989 14 968 19 958 597 C Watts Watts Watts 56 13 3 58 7 21 9 116 637 49 911 66 548 3 127 13 1 510 3 557 18 7 61 14 8 12 2 4 875 14 624 19498 548 1641 58 8 21 8 16 542 49 625 66 166 3 351 14 0 510 3 781 17 5 149 121 4 847 14 540 19386 543 66 18 9 60 8 19 8 115 019 45 057 60 076 3 352 14 8 510 3 790 15 9 73 16 0 11 0 4 401 13 202 17602 464 22 8 61 0 19 6 14 894 44 681 59 575 3 577 15 7 510 4 015 14 8 78 25 6 164 1106 281 12722 16863 Teso 283 165 105 4198 125 ez Compressor ZPS51K4E PFV ISSUE 02 08 OCT 2010 Page 41 L s 14 4 0 909 14 4 0 909 14 4 0 909 14 4 0 909 14 4 0 909 14 4 0 909 14 4 0 909 14 4 0 909 C 62 0 16 7 67 1 195 72 0 22 2 77 0 25 0 83 2 28 4 88 2 31 2 93 1 33 9 98 1 36 7 11 0 6 1 11 1 6 2 11 0 6 1 11 0 6 1 10 2 5 7 10 2 5 7 10 1 5 6 10 1 5 6 Watis 79 294 23 233 79 790 23 378 78 961 23 135 79 343 23 247 73 256 21 464 73 523 21 542 72 639 21 283 72 825 21 338 49 7 0 20 2 Ext Static 000821 01 CAPACITY RATINGS continued Heating Mode RH 75 HACW P 1T Nominal 6 ton 410 60 Hz USGPM F BIU Hr Watts Amps Watts W W F F BTU Hr C C L s 05 67 106r 6901 50
16. 2 Low Outdoor loop entering liquid temperature 3 Dirty or fouled Outdoor loop heat exchanger B High Pressure Control The high pressure safety control monitors the compressor discharge pressure and will shut the compressor down if the condensing pressure becomes too high There are 3 main reasons why this control would activate in response to the operating conditions of the unit while operat ing in heating mode 1 Low or no airflow 2 High return air temperature 3 Dirty air coil due to poor filter maintenance The unit contains a control board that monitors the safety controls and operates the compressor accordingly Refer to APPENDIX A for control board specifications The low pressure control is connected to LP1 and LP2 The high pressure control is connected to HP1 and HP2 The control board also has provisions for a flow switch The flow switch is unused from the factory and a jumper wire is placed across the FLOW SWITCH terminals If a flow switch is desired the jumper can be removed and the two leads from the flow switch can be connected to the FLOW SWITCH terminals on the safety board The flow switch is ignored for 30 seconds on compressor startup to allow time for flow to be established The high and low pressure controls are monitored at all times The compressor will not be able to start if either of them has a fault The control board has an on board LED and a FAULT pin with a 24 output An external i
17. 2465 109 13 1400 661 1400 661 2350 Stage 2 1700 802 3 370 Stage 1 1700 802 2 755 45 600 Stage 2 2100 991 4 105 61 100 1900 897 3 415 50500 148 4 333 _ 2400 1133 4 815 69000 202 448 Stage1 2400 1133 5 770 81 500 239 4 14 000821MAN 01 Page 36 ISSUE 02 08 OCT 2010 9 M ON N N N N STADARD CAPACITY RATINGS continued Table 16 Standard Capacity Ratings Ground Loop Cooling EAT 80 6 F 27 C Pressure Liquid Flow GA USG L s Stage 1 60Hz STAGE 1 ELT 68 F 20 C STAGE 2 ELT 77 F 25 C Input Us Stage 2 Stage 1 Stage 2 Stage 1 Stage 2 1400 661 1 760 7 12 1700 802 2990 51 800 1700 802 2 205 47 600 991 850 401 925 21 700 6 3 472 1 615 26 200 7 7 152 140 1000 17 6 in 091 5 4 41 Stage 1 1200 566 980 28 400 16 8 2100 3 980 59 900 897 5 61 Stage 2 SSS LIGAL oa 14 16 8 1 06 15 NaCl by Weight Ground Loop Fluid 2 Table 17 Standard Capacity Ratings Ground Water Cooling EAT 80 6 F 27 C Pressure 14 5 Stage 2 1400 661 1 965 37 200 42 800 20 5 1900 2 995 57 300 2400 1133 4 975 70 000 E 2400 1133 5 850 4 12 60
18. 6 3 80 35 7 48 0 56 9 6 3 Models are single stage HAC models be connected with 2 conductor cable if using 230VAC Outdoor Circulators Compressor single stage HAC models may be connected with 3 conductor cable if using 230 Outdoor Circulators Table 20 Heat Pump Electrical Information 220 1 50 Outd Fuse Wi eee Size wot 52 as 40 18 sojer ss mou 07 88 ao so zs Les so 2 sa 329 176 Models are single stage Table 21 Heat Pump Electrical Information 380 3 50 Compressor Outdoor Max Fuse Wire Circulators Breaker Size e 4e HE WE WEE EM 55 65 10 0 Models are Sms stage 11 7 000821MAN 01 Page 44 ISSUE 02 08 OCT 2010 ELECTRICAL DIAGRAMS 230 1 60 RH Series Schematic Diagram 230 1 60 Two Stage Scroll ECM Fan L1 L2 Outdoor Gnd 230VAC Circulator Pumps N 115 230v 115 115 alelalgle Left Right Return L T T L Compressor 3 L T T L 2 p C 115VAC DHW lt L T T L Circulator Pump Run Cap 1 Start Cap Compressor Hot Water Limit Contactor Potential Relay Ww NOTE HACW only Ar Tion Select 2 To temporarily disconnect the DHW circulator Low 6
19. 65 47 6 3 60 Connect Gnd to Gnd Lug 75 50 6 3 60 1 1 Pew aes 170 Plantation Rd MARITIME GEOTHERMAL m _ 11 11 Approved By E Name Chris Geddes 15 08 RH HAC P 1T DEL Electrical Box Diagram 000143 C GEDDES C GEDDES EE Approved By MFG Date S 01 initial Release C GEDDES C GEDDES ize Drawing Number REV SHEET A dB Dat ECO IMPL BY APVD BY 000684ELB 02 1 of 1 000821MAN 01 Page 46 ISSUE 02 08 OCT 2010 25 MAY 09 15 APR 08 DATE ELECTRICAL DIAGRAMS 230 1 60 continued RH Series Electrical Box Diagram 230 1 60 Two Stage Scroll ECM Fan Right Return Low Voltage Wiring 24VAC Airflow Reduction Thermostat Wiring Connections Field Use an 18 8 conductor cable to connect this Thermostat Plenum Heat T stat unit to the thermostat Wiring YiRH L Woy ARAR2 1 24 Stage 1 Heat Cool Compressor 4 Ru 2AVAC Hot lx Trouble if available on thermostat W2 Stage 2 Heat Plenum Heater Airflow Adj O B W1 Reversing Valve Active in Cooling Y2 Stage 2 Heat Cool Compressor Med Nom 12 S2 Solenoid 911111119 gt 1 T Airflow Reduction Wiring eas Use an 18 2 conductor ca
20. 9 215 Compressor ZPS20K4E PFV 37 3Pa 01520 Ext Static N N J J N 1 698 000821MAN 01 Page 38 ISSUE 02 08 OCT 2010 CAPACITY RATINGS continued Heating Mode H 45 HACW P 1T R410a 60 Hz Power Consumption Sink Data Indoor Loo USGPM BTU Hr E CFM BTU Hr Watts Watts 20 108 1 993 9 103 1 400 85 9 17 9 27 106 5 891 39 4 661 29 9 9 9 7 942 27 5 21 898 105 1 400 87 2 19 2 29 091 0 606 6 416 40 6 661 30 7 10 7 8 524 9 6 33 1 23 818 107 1 400 88 6 20 6 31 207 0 606 6 979 41 7 661 31 4 11 4 9 144 9 6 38 7 25 01 110 1 400 90 0 22 0 33 382 0 606 7 530 43 3 661 32 2 12 2 9 781 96 41 2 28 591 112 1 400 92 0 24 0 36 436 8 3 0 606 5 1 8 377 44 4 661 33 44 13 4 10 676 93 0 9 6 46 8 30 756 115 1 400 93 7 25 7 38 907 0 606 9 011 46 1 661 34 3 14 3 11 400 59 0 9 6 52 3 33 262 117 1 400 95 5 27 5 41 627 15 0 0 606 11 3 9 746 47 2 661 35 3 15 3 12 197 65 0 50 9 6 57 8 119 1 400 97 4 29 4 44 506 18 3 10 0 0 606 14 3 48 3 661 36 3 16 3 13 040 zu zu 2 zu zu 3 zu 2 zu zu 26 0 21 8 CO 1 PN 0 606 Go
21. FIELD CHANGEABLE SIDE OR END REVERSIBLE REMOVABLE FILTER RACK FOR 38 x 20 x 2 AIR FILTER ALLOWING THUMB SCREW FILTER CHANGE Back View 000821MAN 01 Page 52 ISSUE 02 08 OCT 2010 CASE DETAILS Left Hand Return Size 55 to 75 continued DOOR ACCESS TXV FILTER DRYER SIGHT GLASS DHW PUMP BLOWER POSITION IS FIELD CHANGEABLE SIDE OR END Bottom View ISSUE 02 08 OCT 2010 Page 53 000821MAN 01 CASE DETAILS Right Hand Return Size 55 to 75 1 1 8 DHW IN 1 2 FPT X 1 7 5 IL OUT 1 2 THERMOSTAT WIRE CONN 8 13 4 oL 1L 4 1 8 IGH PRESSURE SERVICE PORT LOW PRESSURE SERVICE PORT ONDENSATE DRAIN 3 4 NOM PVC INS NOT INTERNALLY TRAPPED DOOR ACCESS ELECTRICAL BOX COMPRESSOR CIRC PUMP CONNECTION op ELECTRICAL SERVICE Front View BLOWER POSITION IS FIELD CHANGEABLE SIDE OR END 1 10 REVERSIBLE REMOVABLE FILTER 1 1 8 RACK FOR 38 x 20 x 2 AIR FILTER ALLOWING THUMB SCREW FILTER CHANGE Back View 000821MAN 01 Page 54 ISSUE 02 08 OCT 2010 CASE DETAILS Right Hand Return Size 55 to 75 continued BLOWER POSITION IS FIELD CHANGEABLE SIDE OR END DOOR ACCESS TXV FILTER DRYER SIGHT GLASS DHW PUMP c Bottom View ISSUE 02 08 OCT 2010 Page 55 000821MAN 01 APPENDIX A Control Board Specifications Anti short cycl
22. C Check static refrigeration pressure of the unit for a very low value Verify jumper is in place between pins marked FLOW SWITCH Correct or replace wiring Replace thermostat Replace high pressure control if voltage is present on HP1 but not on 2 Replace control board Replace high pressure control if voltage is present on LP1 but not on LP1 Replace control board Locate the leak and repair it opray nine a sniffer and dye are common methods of locating a leak Place a jumper if missing Flow switch faulty Only if installed Faulty control board ISSUE 02 08 OCT 2010 Verify 24VAC is present between each flow switch pin on the control board and the C terminal of the ter minal strip while there is flow through the unit 24VAC is present across each FLOW SWITCH terminal and C but not voltage is present across CC on the control board and C Page 25 Replace flow switch if signal is not present at both terminals on the control board Replace control board 000821MAN 01 Compressor will not start Compressor starts hard Compressor Stage 2 will not activate 000821MAN 01 COMPRESSOR TROUBLESHOOTING Fault Possible Cause Verification Recommended Action Faulty control board Measuring from C on the terminal Strip verify there is voltage at Y HP1 HP2 LP1 LP2 and both flow pins but no voltage present at CC Replace control board
23. Hot Water Pre Heat Tank MFG Date Page 9 Pressure Relief Drawing Name Ball Valve gt 125psig Pressure Relief Valve 125psig Pressure Relief Valve 120 140 F 50 60 Electric or Gas Insulated Domestic Hot Water Tank 125psig Pressure Relief Valve alve Ball Valve Domestic HOT OUT to house or mixing valve Domestic HOT OUT to house or mixing valve 120 140 F 50 60 C Electric or Gas Insulated Domestic Hot Water Tank GEOTHERMAL Single Unit Connection 170 Plantation Rd Petitcodiac NB E4Z 6H4 to DHW Pre Heat Tank Brass FPT Size Drawing Number REV SHEET 000970PDG 000821MAN 01 Sizing and Ductwork HEAT PUMP SIZING TABLE 4 depicts a rough guideline as to the size of home each heat pump size can handle for ground loop installations TABLE 4 Heat Pump Size vs Heated Area for a Ground Loop System Sueton Sat 800 1 400 75 EN 2 000 185 ose 75 3 100 80 3 500 TABLE 5 depicts a rough guideline as to the size a home each heat pump size can handle for ground water installations TABLE 5 Heat Pump Size vs Heated Area for a Ground Water System size tons sat 1 000 1 800 3 800 4 200 WM 2 500 os os 80 THE TABLES ABOVE ARE FOR INFORMATION ONLY THE
24. The stages are S1 Stage 1 compressor S2 Stage 2 compressor and S3 electric auxiliary heating only One can be purchased with the unit or other thermostats with the same number of stages can be used The electrical box diagram on the electrical box cover provides a description of the signal connections as in TABLE 1 Description G Fan low speed for air circulation Ru 24VAC Hot Heat Pump Stage 3 auxiliary heat Emergency Heat Cooling Mode reversing valve Yo Heat Pump Stage 2 Airflow Reduction ha Plenum Heater dry contact a Plenum Heater dry contact Connect to with a dry contact to reduce the air flow by 15 Refer to the Fan Motor sub section for more information ISSUE 02 08 OCT 2010 NOTE Some three phase units are not available in two stage at the present time The Y2 signal is not used for these units FAN MOTOR The unit is equipped with a direct drive ECM fan motor for maximum efficiency The motor features a soft start which fur ther improves efficiency by eliminating inrush current and pro vides a smooth quiet ramp up to speed The motor will main tain the programmed air flow up to the maximum external static value Refer to the APPENDIX B ECM Fan Airflow Tables The air flow can be set to four different levels by changing the position on the Air Flow board located in the electrical box The four levels are indicated in TABLE 2 The actual air flow val
25. White Black Stripe pump remove the brown wire with the Med Nom Default 15 insulated terminal marked A from the bottom High 6 14 5 right terminal of the compressor relay Max 12 2 1 um NL 2 WELL Electronic WELL LOOP 2 Med 12 2 Ball Valve Solenoid Valve Valve _ High gt 7 White 2 19 6 6 1 1 5 5 230 Required Connections IS A Control Ne Airflow Transformer i N N N White Black Stripe AR1 Reduction 2 Wiring AR2 4 eR410a 75psig Low Pres 1 R410a 55psig C High Pres R410a 565psig Y1 11 Ru im LP1LP2 Y FLOW a Thermostat 2 Wiring L i STATUS 5 1 High 9 11 Compressor 2 Low C F Contactor Coil 3 Flow status il V Reversing Valve Coil Plenum 2 3 Heater M enum Hea Wiring 1 Relay 0227 1 009 3 Compressor White Black Stripe Stage 2 Coil PLENUM HEATER OPERATION AIRFLOW REDUCTION 8 1 provides a set of dry Connect AR1 4 AR2 together with contacts for operating plenum heater dry contacts to reduce the airflow Fan will run automatically with for zone applicatio
26. above _ _ Initial Release GEDDES GEDDES 10 DEC 08 IMPL APVD BY DATE ISSUE 02 08 OCT 2010 170 MARITIME GEOTHERMAL Drawing Typical Ground Water Installation for Size 25 75 Heat Pumps Brass FPT Size Drawing Number REV SHEET 00090706 000821MAN 01 GROUND WATER DISPOSAL METHODS Pressure Nordic Pitless Adaptor Water Table Pond Lake minimum 8Oft Stream Submersible Pump Nordic Pitless Adaptor Water Table minimum 8Oft Submersible Pump Pressure Pitless Adaptor Water Table Tile Field minimum 8Oft Submersible Ground Water Disposal Methods Size Number REV SHEET 1 Sm z CED ris Geddes Petitcodiac NB MARITIME GEOTHERMAL mn 22 Chris_Geddes Drawina N swing Name Chris_Geddes Approved By MFG Date GEDDES GEDDES 04 FEB 08 EV ECO IMPL BY APVD BY DATE A 000821MAN 01 Page 16 ISSUE 02 08 OCT 2010 Ground Loop System Information Once the ground loop has been pressure tested and the header pipes have been connected to the circulator pump module the heat pump can be connected to the circulator pu
27. adjusted too far open Verify superheat It should be be tween 8 12 F 3 6 C Superheat will be low if TXV 15 open too far Adjust TXV to obtain 8 12 F 3 6 C superheat Adjust the TXV all the way in and out a few times to loosen it Replace TXV if this does not work TXV stuck open Adjusting the TXV does not affect the superheat or the suction pres sure Low super heat and discharge pressure Compressor See Low Suction frosting up Pressure in this section frosting TXV stuck almost closed or partially blocked by for eign object Adjusting the TXV does not affect the superheat or the suction pres sure Attempt to adjust the all the way out and all the way in a few times to loosen it Replace TXV if this does not work Random high pressure trip does not occur while on site Faulty compressor contac Points pitted or burned Contactor sometimes sticks causing the com pressor to run without the fan trip ping the high pressure control Intermittent fan See Fan Troubleshooting section Correct the problem Replace contactor OPERATION TROUBLESHOOTING COOLING MODE Faut Possible Cause Verification Recommended Action _ Heating instead of cooling High Discharge pressure 000821MAN 01 Thermostat not set up properly Faulty reversing valve so lenoid coil Faulty reversing valve Low or no Outdoor liquid flow Entering liquid tempera ture t
28. boxes circle the appropriate units Fill in the top section of all three copies or one copy if photocopies can be made after the startup has been completed PRE START INSPECTION Ductwork Verify that all ductwork has been completed and is firmly attached to the unit Verify that any dampers or diverters are properly set for operation of the heat pump Verify that all registers are open and clear of any objects that would restrict the airflow Verify that a new air filter is installed and the cover is secured Verify the condensate drain is connected properly vented and free of debris If a plenum heater has been installed verify that it is securely fastened to the ductwork Outdoor Loop Ground Loop 1 Verify that all shutoff valves are fully open and there are no restrictions in the piping from the heat pump to the ground loop and that full flow is available to the heat pump 2 Verify that the entire system has been flooded and all the air has been purged as much as possible Further purging may be required after the system has been operating for a while 3 Verify that the loop contains the proper mix of antifreeze for the intended application Record the type of antifreeze and the mixture value on the startup sheet circle Vol or Weight 4 Record the static loop pressure on the startup sheet Outdoor Loop Ground Water 1 Verify there are no leaks in the connections to the unit Verify the water va
29. lines and Have a qualified service techni heat exchanger check the inside of the pipes for cian backflush the coaxial ex typically for ground water scale deposits changer unlikely for ground loop Return air too cold Measure return air temperature Restrict air flow temporarily until Should be above 60 F 15 room comes up to temperature stuck almost closed Adjusting the T XV does not affect the Adjust the all the way in and or partially blocked by for superheat or the suction pressure out a few times to loosen it Re eign object TXV may be frosting up place TXV if this does not work Low refrigerant charge Entering liquid temperature flow and Locate the leak and repair it entering air temperature are good but Spray nine a sniffer and dye are suction is low Check static refrigera common methods of locating a tion pressure of the unit for a very leak low value Faulty compressor not Pressures change only slightly from Replace compressor pumping static values when compressor is started ISSUE 02 08 OCT 2010 Page 27 000821MAN 01 OPERATION TROUBLESHOOTING HEATING MODE Fault Possible Cause High Suction Leaking reversing valve Pressure may appear to not be pumping Verification Recommended Action Reversing valve is the same tem perature on both ends of body common suction line is warm com pressor is running hot Replace reversing valve TXV
30. reduced 000821MAN 01 Page 10 Once the total heat loss has been calculated the unit can be sized using the performance tables from the specifications document in conjunction with the minimum expected entering liquid temperature of the ground loop well water temperature for ground water system The heat pump output must be able to match the total heat loss at the selected entering water tempera ture in order to provide a comfortable environment with minimal auxiliary heat DUCT SYSTEMS GENERAL Ductwork layout for NORDIC heat pump will differ from traditional hot air furnace design in the number of leads and size of main trunks required Air temperature leaving the heat pump is normally 95 105 F 35 40 much cooler than that of a conventional warm air furnace To compensate for this larger volumes of lower temperature air must be moved and consequently duct sizing must be able to accommodate the greater air flow without creating a high static pressure or high velocity at the floor diffusers A duct system capable of supplying the required air flow is of utmost importance Maritime Geothermal Ltd recommends that the static pressure be kept below 0 2 inches of water total In some instances the number of floor diffusers will actually double when compared to the number that would be used for a hot air oil fired furnace Refer to TABLE 8 at the end of this section Generally allow 100 cfm for each floor grill
31. single tank setup CAUTION If two 2 shut off valves are located on the do mestic hot water ines as shown in the diagram a pressure relief valve must be installed to prevent possible damage to the domestic hot water circulator pump should both valves be closed 000821MAN 01 Page 8 ISSUE 02 08 OCT 2010 Single Unit Connection to Domestic Hot Water Pre Heat Tank Brass FPT Top Port Configuration Domestic COLD IN from well HEAT PUMP CONNECTIONS 1 2 Union DHW OUT 1 2 1 2 FPT a Boiler Drain Valve NOTE Refer to the heat pump labels for connection locations 1 2 COPPER LINES OPTIONAL must install both DHW IN 1 2 HEAT PUMP CONNECTIONS 1 2 Union DHW OUT E 1 2 1 2 1 2 ET Boiler Drain 1 2 COPPER LINES Valve NOTE Refer to the heat Domestic labels for COLD IN from well connection locations OPTIONAL must install both 125pisg 1 2 PRV j Valve DHW IN 1 2 FPT Chris Geddes 1 Chris Chris Geddes 01 initial Release GEDDES C GEDDES 10 MAR 09 A dB ECO IMPL BY APVD BY DATE ISSUE 02 08 OCT 2010 Ho uz a Ball Check Valve Insulate with 5 8 pipe insulation Ball Check Valve Insulate with 5 8 pipe insulation Approved By Insulated Domestic Hot Water Pre Heat Tank Insulated Domestic
32. single zone with one thermostat The ther mostat should be centrally located within the home typically on the main floor It should be placed away from any supply grills and should not be positioned directly above a return grill Most installations have the thermostat located in a hallway or in the inner wall of the living room It should be noted that most homes do not have any supply ducts in the hallway This can lead to a temperature lag at the thermostat if there is very little air movement in the hallway causing the home to be warmer than indicated by the thermostat PLENUM HEATER OPTIONAL For installations that do not already have a backup heat source such as electric baseboard wood stove propane etc it is recommended that a plenum heater be installed This pro vides two functions The first function of the plenum heater is to act as an auxiliary heat source As such it will provide additional heat on extremely cold days if the heat pump 15 unable to bring the home tempera ture up quickly enough eliminating any discomfort to the home owner ISSUE 02 08 OCT 2010 The second function of the plenum heater is to provide emer gency heat should a problem occur that causes the heat pump to be locked out This can be engaged by setting the thermostat to emergency heat allowing the plenum heater to function while preventing the heat pump from operating Should the heat pump fail while the home is vacant the auxiliary functio
33. temperature poke a small hole in the flex collar and insert probe in airstream 4 Duct Supply temperature poke a small hole in the flex collar and insert probe in airstream 5 Duct Delta should be between 20 30 F 11 17 6 Outdoor Loop In Supply In temperature 7 Outdoor Loop Out Supply Out temperature 8 Outdoor Delta T should be between 5 8 F 3 4 C 9 Outdoor flow if available 10 Compressor L1 C current black wire place meter between electrical box and compressor 4 Adjust the thermostat setpoint to the desired room temperature and let the unit run through a cycle Record the setpoint and the discharge pressure when the unit shuts off 5 For units with a desuperheater turn the power off to the unit Connect the brown wire with the blue insulated terminal to the compressor contactor as shown in the electrical box diagram Turn the power to the unit on 6 Remove the electrical cover from the plenum heater Place a current clamp meter around one of the supply wires the power to the plenum heater Adjust the thermostat setpoint to 85 F 29 C Verify that the current draw increase as each stage is activated 10kW has 2 stages 15kW has 3 stages and 20kW has 4 stages 7 Verify the DHW IN and DHW OUT temperatures if applicable by hand caution pipes get hot If the DHW OUT line does not become hotter than the DHW IN line the circulator is air locked Bleed the air from the system and check the temp
34. the anti short cycle timer to 5 seconds Be sure to set it back to NO when servicing is complete POWER SUPPLY TROUBLESHOOTING Possible Cause Verification Recommended Action No power to the Disconnect switch open Verify disconnect switch is inthe Determine why the disconnect heat pump if installed ON position switch was opened if all is OK close the switch Fuse blown At heat pump disconnect box Reset breaker or replace fuse Breaker Tripped voltmeter shows 230VAC on the with proper size and type Time line side but not on the load side delay type D No display on Transformer breaker Breaker on transformer is sticking Push breaker back in If it trips thermostat tripped out again locate cause of short circuit and correct Faulty transformer Transformer breaker is not Replace transformer tripped 230VAC is present across 11 and 13 of the compres sor contactor but 24VAC is not present across Ry and C of the terminal strip Faulty wiring between 24VAC is not present across C Correct the wiring heat pump and thermo and of the thermostat Stat Faulty Thermostat 24VAC is present across C and R Replace thermostat Ry of the thermostat but ther mostat has no display 000821MAN 01 Page 24 ISSUE 02 08 OCT 2010 THERMOSTAT TROUBLESHOOTING Verification Recommended Action Correct the setup Possible Cause Y1 signalto Incorrect thermostat heat pump se
35. 05 04 03 05 04 03 05 04 03 SDELF 05 04 03 05 04 03 CorZ ISSUE 02 08 OCT 2010 Page 3 000821MAN 01 Table of Contents TABLES DIAGRAMS amp DRAWINGS aa PAGE 5 INSTALEATIONANFORMA TION 202 ace ee eee eee ce eee PAGE 6 6 Unpacking UNG UNM ns 6 elei i e eT 6 Electrical Connections FUE 6 Circulator Pump Module Wiring Ground Loop Only Page 6 Thermostat MEGUIFCMECING Page 6 Fan 0 EEr EEan Page 7 Return Orientation Page 7 1111 1 491461 1 10 11 E ee ae ee Page 7 7 _________________ ___
36. 164 N LIN 27 8 gt 0 7 38 7 N 49 6 9 12 7 60 2 15 7 9 iN N e co C1 Co gt 4 5 8 8 4 9 Compressor ZPS60K4E PFV RH 75 HACW P 1T F F CEM Watts 36 059 10 565 39 711 11 635 43 637 12 786 47 847 14 019 53 985 15 817 58 933 17 26 64 198 18 81 69 788 20 448 I N BIU Hr 64 3 739 17 3 25 83 4 14 4 34 BTU Hr 775 775 775 3 53 3 94 4 47 16 9 775 4 419 3 34 68 20 0 68 20 0 17 8 775 4 600 3 73 68 20 0 68 20 0 18 8 775 4 865 4 24 68 20 0 68 20 0 F L s 2 400 1 133 2 400 1 133 2 400 1 133 2 400 1 133 2 400 1 133 2 400 1 133 2 400 1 133 2 400 1 133 C 87 4 30 8 89 0 31 7 90 6 32 6 92 3 33 5 95 0 35 0 97 0 36 1 99 2 37 3 101 5 38 6 19 4 10 8 21 0 11 7 22 6 12 6 24 3 13 5 27 0 15 0 29 0 16 1 31 2 17 3 33 5 18 6 Watts 50 553 14 812 54 514 15 973 58 751 17 214 63 272 18 539 70 124 20 546 75 404 22 093 81 010 23 36 86 953 25 477 49 7Pa USGPM 0 20 2 Ext Static R410a 60 Hz F F C 80 6 27 0
37. 4 2x4 30x36 32x34 33x33 Pb 8x4 32x38 34x36 35x35 80x45 34 40 36x38 37 37 ISSUE 02 08 OCT 2010 Page 13 gt lt gt lt Return Air Diameter in Airflow L s N N N A 000821MAN 01 Ground Water System Information GENERAL REQUIREMENTS 1 The temperature of the well water should be a minimum of 39 F 4 C and should normally 45 F 7 C 2 The well system must be able to supply the required water flow as listed under the Total Flow column in TABLE 9 Heat Minimum Air Pump Home Total Bladder Flow Flow Flow Tank IGPM IGPM IGPM IGal USGPM USGPM USGPM USgal 25 672 3 36 9 108 1822 9 10 8 1822 55 10 12 0 3 3 6 13 15 6 26 31 12 144 3 3 6 15 18 0 30 36 14 16 8 3 3 6 17 20 4 34 41 14 16 8 3 3 6 17 20 4 34 41 These are minimum water requirements based on an entering water temperature of 46 F Based on two minute well pump run time Use next size larger tank if there is not a match for the value indicated A larger tank may be used if a longer run time is desired PLUMBING THE HEAT PUMP Plumbing lines both supply and discharge must be of adequate size to handle the water flow necessary for the heat pump A 1 copper or plastic line should be run to the Outdoor IN Supply IN pipe of the heat p
38. 47 8 3 48 8 9 48 8 9 L s 1 700 802 1 700 802 1 700 802 1 700 802 1 700 802 1 700 802 1 700 802 1 700 802 C C Watts Watts Watts 56 4 24 2 14 834 44 502 59 336 2 100 9 1 13 6 13 4 4 346 13 039 17385 7 27 106 189 118114247 112740 sese 143 127 20 1249 16478 11 8 3862 vss 15450 293 154 1158 8754 111262 1501 8 185 115 8716 483 zs Compressor ZPS40K4E PFV 000821MAN 01 Page 40 310 2 392 24 8 C 51 56 13 3 18 9 26 1 L s 12 0 0 757 12 0 0 757 12 0 0 757 12 0 0 757 12 0 0 757 12 0 0 757 12 0 0 757 12 0 0 757 C 62 3 16 8 67 1 19 5 72 2 22 3 77 0 25 0 84 4 29 1 89 3 31 8 94 3 34 6 99 1 37 3 11 3 6 3 11 1 6 2 11 2 6 2 11 0 6 1 10 4 5 8 10 3 5 7 10 3 3 10 1 5 6 Watts 67 562 19793 66 693 19 541 66 924 19 608 65 976 19 331 62 623 18 348 61 670 18 069 61 700 18 078 60 691 17 782 37 3Pa 0 15inH20 Ext Static ISSUE 02 08 OCT 2010 CAPACITY RATINGS continued Heating Mode RH 65 HACW P 1T Nominal 5 ton USGPM BTU Hr Amps Watts W W em 15 144 4 8 32 607 3 170 14 9 465 3 593 3 62 F 68 0909 60 26 941 20 14 4 5 2 35
39. 5 233 3 40 Connect Gnd to Gnd Lug 9 A O 75 50 6 3 60 170 Plantation Rd CED m Manu GEOTHERMAL Name Chis Geddes _____ 15 APR 08 RH HAC P 1T DER Electrical Box Diagram Pat Se Drawing Number REV SHEET ISSUE 02 08 OCT 2010 Page 47 000821 01 CASE DETAILS Left Hand Return Size 25 to 45 17 8 DHW IN 1 2 FPT 11 8 DHW OUT 1 2 FPT A THERMOSTAT WIRE CONN T DOOR ACCESS ELECTRICAL BOX 22 1 4 COMPRESSOR 20 3 4 19 1 2 CIRC PUMP 15 7 8 CONNECTION 11 2 ELECTRICAL SUPPLY OUT 2 SERVICE 3 1 2 HIGH PRESSURE SERVICE PORT LOW PRESSURE SERVICE PORT Front View ms REVERSIBLE EE REMOVABLE FILTER RACK 255 BLOWER POSITION IS FOR 30 x20 x2 FIELD CHANGEABLE AIR FILTER SIDE OR END ALLOWING THUMB SCREW FILTER CHANGE 11 3 4 1 1 2 4 1 8 7 8 21 31 4 Back View 000821MAN 01 Page 48 ISSUE 02 08 OCT 2010 CASE DETAILS Left Hand Return Size 25 to 45 continued 10 7 8 4 1 8 7 2 1 4 22 11 11 3 4 DOOR ACCESS FILTER DRYER SIGHT GLASS DHW PUMP BLOWER POSITION IS FIELD CHANGEABLE 7 1 4 SIDE OR END 52 L 3 4 Left Side View Bottom View ISSUE 02 08 OCT 2010 Page 49 000821 1 CASE DETAILS Right Hand Return Si
40. 6 Retrigetant Charge Page 36 standard Capacity iseseisana AKA Page 36 Capac RAUNG E E ASN E Page 38 AEA 43 Electrical Diagrams 2301 60 A DA RM NETRAA Eni 44 Case estes pote 47 APPENDIX A Control Board Specifications PAGE 55 APPENDIX ECM Far Airflow Tables PAGE 56 WARRANTY INFORMATION 60 000821MAN 01 Page 4 ISSUE 02 08 OCT 2010 Tables Diagrams and Drawings TABLES Table 1 Control Signal Description 6 Table 2 Airflow MN EUR A UN RIP MEAE EE Page 7 Table 3 Control Board Fault Codes EX ux E suya oh pss ess c cs rau ERD REUS Page 7 Table 4 Heat Pump Size vs He
41. 8 OCT 2010 UNIT STARTUP The unit is now ready to be started The steps below outline the procedure for starting the unit and verifying proper operation of the unit It is recommended that safety glasses be worn during the following procedures Preparation 1 2 3 Remove the caps from the service ports and connect a refrigeration manifold set to the unit Turn the power on to the heat pump and set the thermostat to OFF Set up the thermostat as per the instructions provided with it so that it will function properly with the heat pump system set for heat pump not for heating and cooling The O signal should be set to active in cooling mode Measure the following voltages on the compressor contactor and record them on the startup sheet L1 L2 L2 L3 L1 L3 Heating Mode 1 Set the thermostat to heating mode and adjust the setpoint to activate Stage 1 and Stage 2 The fan should slowly ramp up to speed after the time delay of the thermostat expires if applicable and the compressor will start allow 30 60 seconds for the water valve to open for ground water systems 2 Check the refrigeration gauges The suction and discharge pressures will depend on the loop temperatures but they should be about 90 110PSIG and 260 360PSIG respectively for a typical start up 3 Monitoring the refrigeration gauges while the unit runs Record the following after 10 minutes of runtime 1 Suction pressure 2 Discharge pressure 3 Duct Return
42. 80 6 27 0 80 6 27 0 80 6 27 0 80 6 27 0 80 6 27 0 80 6 27 0 80 6 27 0 45 7 2 46 7 8 46 7 8 46 7 8 47 8 3 47 8 3 47 8 3 48 8 9 L s 2 400 1 133 2 400 1 133 2 400 1 133 2 400 1 133 2 400 1 133 2 400 1 133 2 400 1 133 2 400 1 133 000821MAN 01 C 58 6 22 0 19 032 57 095 76 127 3 436 4 259 17 9 148 12 2 5 576 16 729 22305 5 24 128 59 1 21 5 18 591 55 773 74 364 3 650 4 473 16 6 60 F BTU Hr Fe Watts Watts Watts COPc 58 6 22 0 19 099 57 298 76 397 3 223 4 046 18 9 50 14 8 12 2 5 596 16 788 22384 5 53 100 C L s 16 8 1 061 C 60 8 16 0 10 8 6 0 oC Watts 90 402 26 487 55 161 111975447 16041 21788 Taer 156 59 7 20 9 118 139 54 416 72 554 3 870 4 693 15 5 15 4 11 6 5 315 15 944 21 258 453 59 7 20 9 18 079 54 238 72 317 3 868 4 718 15 3 71 65 18 3 1544 11 6 5297 15802 Tam 27 187 113 5154 115468 20618 160 11 5008 115023 0031 272 61 1 76 24 4 81 19 5 16 896 50 688 67 584 4 571 5 421 12 5 86 16 2 10 8 4 951 14852 19802 65 300 Compressor ZPS60K4E PFV Page 42 16 8 1 061 16 8 1 061 16 8 1 061 16 8 1 061 16 8 1 061 16 8 1 061 16 8 1 061 65 8 18 8 70 7 21 5 75 6 24 2 81 5 27 5 86 4 30 2 91 3 32 9 96 3 35 7 2
43. 857 3 261 15 3 465 3 684 3 82 20 0 25 14 4 5 7 39 351 3 351 15 7 465 3 774 4 02 68 30 14 4 6 3 43 096 3 443 16 1 465 3 866 4 23 68 20 0 35 14 4 6 8 48 376 3 722 16 7 465 4 110 4 43 68 40 14 4 7 5 52 760 3 821 17 2 465 4 209 4 65 68 20 0 45 14 4 8 1 57 424 3 923 17 6 465 4 311 4 88 68 69 0 50 144 8 8 62 376 4 028 18 1 Compressor ZPS51K4E PFV RH 65 HACW P 1T F E CFM BIU Hr BIU Hr BTU Hr 465 4 416 5 12 68 Tl iu L min 2 100 991 2 100 991 2 100 991 2 100 991 2 100 991 2 100 991 2 100 991 2 100 991 87 5 30 9 89 1 31 7 90 8 32 7 92 6 33 6 95 3 35 2 97 4 36 3 99 6 37 5 101 9 38 8 F 19 3 10 9 21 1 22 8 12 7 24 6 13 6 27 3 1222 29 4 16 3 31 6 17 5 33 9 18 8 410 60 Hz BTU Hr Watts 44 433 13 019 47 993 14 062 51 796 15 176 55 852 16 365 62 080 18 189 66 802 19 573 71 813 21 041 77 123 22 597 49 7Pa USGPM 0 20inH20 Ext Static F BIU Hr C 80 6 27 0 80 6 27 0 80 6 27 0 80 6 27 0 80 6 27 0 80 6 27 0 80 6 27 0 80 6 27 0 44 6 7 45 7 2 45 7 2 46 7 8 46 7 8 47 8 3 47 8 3 48 8 9 L s 2 100 991 2 100 991 2 100 991 2 100 991 2 100 991 2 100 991 2 100 991 2 100 991 C
44. 8RCD 01 1 of 1 ISSUE 02 08 OCT 2010 Page 35 000821MAN 01 25 JAN 10 DATE Model Specific Information This section provides general information particular to each model For complete specifications please see the specifications REFRIGERANT CHARGE CHART SHIPPING INFORMATION Table 12 Refrigerant R410a Table 13 Shipping Information System contains POE oil STADARD CAPACITY RATINGS The tables below depict the results of standard capacity rating tests according to C13256 1 which is identical to 15013256 1 Stage 1 values do not apply to single stage units Refer to the Electrical Tables to determine which models are single stage Table 14 Standard Capacity Ratings Ground Loop Heating 60Hz STAGE 1 ELT 41 F 5 C EAT 68 F 20 C STAGE 2 ELT 32 F 0 Input 8 BTU H 1 850 401 1 085 Stage 2 1000 472 Stage 1 1200 566 1400 661 2 190 1400 661 2 310 ge2 1700 802 3 120 39 700 Stage 1 1700 802 2 690 39 700 Stage 2 2100 991 3 670 48 000 46 31 7 Stage2 2400 1133 4 530 53 700 46 31 7 Stage1 2400 1133 5420 63 500 Pressure Drop s eB 15 NaCl by Weight Ground Loop Fluid Table 15 Standard Capacity Ratings Ground Water Heating 60Hz EAT 68 F 20 C ELT 50 F 10 C Pressure Liquid Flow Drop Tm Le Watts BTU H 850 401 443 1110 49 _ Stage 2 1000 472 7 0
45. ARNING USE ONLY COPPER LINES TO CONNECT THE DESUPERHEATER TEMPERA TURES COULD REACH 200F SHOULD THE DHW CUTOUT SWITCH FAIL POTENTIALLY RUPTURING PEX PIPING Ensure the tank is filled with water and under pressure before activating the heat pump Slightly loosen the boiler drain on the DHW Out pipe to allow air to escape from the system before the unit is started This step will make certain that the domestic hot water circulator in the unit is flooded with water when it is started CAUTION the domestic hot water pump is water N lubricated damage will occur to the pump if it is run dry for even a short period of time Connect the brown wire with the blue insulated terminal to L1 of the compressor contactor Ensure the power is off when connecting the wire The DHW loop may have to be purged of air several times before good circulation is obtained A temperature difference between the DHW In and DHW Out can be felt by hand when the circulator pump is operating properly For the pre heat tank setup the final tank should be set to 140 F 60 C unless local code requires a higher setting pre heat tank does not require electric elements This setup takes full advantage of the desuperheater as it is the sole heat provider to the pre heat tank The desuperheater remains active during the compressor runtime until the pre heat tank has been completely heated by the desuperheater alone This setup is more energy efficient than a
46. CEDURE FOR A COMPRESSOR BURN OUT Pump down the unit as per the Pump Down Procedure above Replace the compressor Replace the liquid line filter drier Vacuum the unit until it remains under 500 microns for several minutes with the vacuum pump valve closed STEP 4 Charge the unit and operate it for continuously for 2 hours Pump down the unit and replace the filter drier Vacuum the unit until it remains under 500 microns for several minutes with the vacuum pump valve closed STEP 5 Charge the unit refrigerant can be re used and operate it for 2 3 days Pump down the unit and replace the filter drier STEP 6 Charge the unit refrigerant can be re used and operate it for 2 weeks Pump down the unit and replace the filter drier STEP 7 Charge the unit a final time Unit should now be clean and repeated future burn outs can be avoided ISSUE 02 08 OCT 2010 Page 33 000821MAN 01 REFRIGERATION CIRCUIT DIAGRAMS Modular R H Series Refrigeration Circuit Heating Mode Air Condenser 1 4 1000 4 A ial WM 000 11 lt Sight NOTE Glass 4 way valve is Low Pressure de energized in Cut out 1 this mode Closed Loop DHW 4 way Low Pressure Filter IN valve 8 Cut out 2 Drier Open Loop Service ie Service Port High Port nj Pressure Cut out D Soe t AD 1 esuperheater B
47. ETTING MED FAN ONLY Recirculation L s CFM L s 381 180 672 317 571 270 396 714 337 CFM ONLY Recirculation CFM L s L s 421 199 358 169 FM 639 959 6 9 3 6 5 8 9 632 298 373 537 671 253 317 472 522 850 401 443 596 507 L s FM Lis PF 9 302 43 256 8 457 23 388 716 1448 683 1230 581 792 1560 736 1326 626 932 1678 1065 1918 6 AIRFLOW SETTING HIGH STAGE 2 STAGE 1 FAN ONLY Recirculation L s CFM L s CFM L s L s CFM L s CFM FAN ONLY Recirculation Lis CFM 306 640 800 1154 54 981 463 753 355 655 814 877 N A CFM 502 692 1013 1580 746 1317 622 1120 528 1279 6 L s 302 1180 557 941 444 478 04 N A N A 710 1999 944 1859 2285 NOTES Unit sizes 25 45 and 55 nominal value up to 0 50 inH20 sizes 65 75 and 80 up to 0 70 2 To obtain the REDUCED airflow values use a dry contact to connect AR1 to AR2 on the terminal strip INFORMATION TAKEN FROM DOCUMENT 000527INF 04 ISSUE 02 08 OCT 2010 Page 57 000821MAN 01 THIS PAGE INTENTIONALLY LEFT BLANK 000821 01 58 ISSUE 02 08 OCT 2010 THIS PAGE INTENTIONALLY LEFT BLANK ISSUE 02 08 OCT 2010 Page 59 000821MAN 01 LIMITED EXPRESS WARRANTY
48. Hz ELT 59 F 15 C 850 401 805 22 500 1000 472 1 310 29 500 8 6 Stage 1 1200 566 835 30 100 8 8 17 2 Stage 2 1 4 1400 661 1 670 40 000 11 7 1400 661 1 75 1965 3 465 2100 1900 4 440 661 802 802 991 7 Stage 2 Stage 1 ISSUE 02 08 OCT 2010 Page 37 97 2400 1133 2400 1133 5 100 000821MAN 01 CAPACITY RATINGS Heating Mode H 25 HACW P 1T Nominal 2 ton Tl Tl T USGPM BrU Hr Amps Watts Watts W W CFM BTU Hr _ Waits 0 454 77 22 3 265 200 472 28 0 8 0 4 581 72 68 94 1 000 836 156 1685 0 454 4 6 23 3564 20 0 472 28 6 86 4 938 72 68 1 000 86 0 18 0 19 522 0 454 16 28 4246 120 472 30 0 10 0 5 720 0 454 36 31 4961 20 0 472 314 11 4 6 490 0 454 67 33 5368 200 472 32 2 12 2 6 961 0454 97 36 5837 200 472 33 1 13 1 7 473 50 72 68 1 000 93 2 25 2 27 284 16 7 100 0 454 128 39 6291 20 0 472 34 0 14 0 7 994 Compressor ZPS20K4E PFV 37 3Pa 01520 Ext Static a 2 9 IN 1 al alol
49. ING PROCEDURE below Generally not required for closed loop systems Whenever system performance is reduced for open loop COAXIAL HEAT EXCHANGER FLUSHING PROCEDURE GROUNDWATER STEP 1 Isolate the heat exchanger by closing the valves in the IN and OUT ports to the heat exchanger Blow out the heat exchanger into a clean 5 gallon bucket using compressed air If a purge cart is not available use a 5 gallon plastic bucket a circulator and some plastic piping to create a makeshift pump system Connect a the inlet and outlet to the heat exchanger ports Place 2 gallons of RYDLYME in the purge cart or bucket Circulate the fluid through the heat exchanger for at least 2 hours 3 recommended Disconnect the purge system dispose of the solution RYDLYME is non toxic and biodegradable and as such can be poured down a drain Connect fresh water and a drain to the heat exchanger ports and flush the exchanger for several minutes Return the plumbing to its original configuration and open the IN and OUT valves Operate the system and check for improved performance STEP 2 STEP 3 STEP 4 STEP 5 STEP 6 STEP 7 Depending on the plumbing there should be either unions or boiler drains for to access the heat exchanger COAXIAL HEAT EXCHANGER FLUSHING PROCEDURE GROUND LOOP STEP 1 Isolate the heat exchanger placing the pump module valves in the exchanger flushing position Connect a compressed air and a drain pipe to the pump module
50. Standard Capacity Ratings Ground Loop Cooling 60HZ Page 37 Table 17 Standard Capacity Ratings Ground Water Cooling 60Hz Page 37 Table 18 Heat Pump Electrical Information 230 1 60 Page 38 Table 19 Heat Pump Electrical Information 208 3 60 Page 38 Table 20 Heat Pump Electrical Information 220 1 50 Page 38 Table 21 Heat Pump Electrical Information 380 3 50 Page 38 DIAGRAMS Diagram Typical P T Pete s Plug amp Thermometer Stem Page 18 Diagram Typical Purge coris Page 18 Case Details Left Hand Return Size 25 45 Page 47 Case Details Right Hand Return Size 25 45 0 0 1 3 Page 49 Case Details Left Hand Return Size 55 75
51. Y SHOULD NOT BE USED TO SELECT A UNIT SIZE They simply show on average what size unit is required for a typical two level home main level and below grade basement with R 20 walls R 40 ceiling and average size and number of windows The Heated Area is the area of the main level The tables account for a basement the same size as the heated area MARITME GEOTHERMAL LTD HIGHLY RECOMMENDS THAT A PROPER HEAT LOSS GAIN ANALYSIS BE PER FORMEDE BY A PROFESSIONAL INSTALLER WITH CSA APPROVED SOFTWARE BEFORE SELECTING THE SIZE OF UNIT REQUIRED FOR THE APPLICATION For heating dominant areas we recommend sizing the unit to 100 of the heating design load for maximum long term efficiency with minimal supplementary heat The unit should be in stalled as per CSA 448 2 02 For ground loop applications the ground exchanger should be designed using suitable software with a multi year analysis There are many factors to consider when sizing the heat pump Some of these factors include the number of levels the size of the windows the orientation of the home attached ga rage bonus rooms walk in basement coldest outdoor tempera ture etc The heat loss program will take all of these factors into consideration in its calculations An undersized installation will require not be as efficient and will required expensive sup plemental heat to maintain a comfortable temperature in the home and the cost savings of having a geothermal heat pump are greatly
52. an Outlet Orientation 25 2 Ton F Field Configurable 45 3 Ton 55 4 gt Fan Return Orientation 65 5 L Left Return 75 6 Right Return 80 6 Ton Single Stage Fan Motor Functions 4 E ECM Variable Speed H Heating AC Active Cooling W Domestic Hot Water Fan D Direct Drive Refrigerant R410a Air Coil S Standard Voltage Code 1 230 1 60 Outdoor Loop Exchanger 2 208 3 60 VAC C Copper 6 220 1 50 VAC Z Cupro Nickel CuNi 7 380 3 50 VAC Compressor Stages S 1 Stage T 22 Stage 2 stage unless unavailable due to voltage code refer to the Electrical Tables 000821MAN 01 Page 2 ISSUE 02 08 OCT 2010 APPLICATION TABLE VOLTAGE STAGES OUTDOOR FAN CASE COIL REVISIONS FUNCTION REFRIGERANT HACW HAC 45 HACW HAC 55 HACW 65 HACW HAC 75 HACW 05 04 03 SDELF 05 04 03 CorZ or 05 04 03 HACW 1 SDERF This manual applies only to the models and revisions listed in this table or SDERF sper 05 o4 03 2 05 04 03 05 04 03 05 04 03 05 04 03 05 04 03 05 04 03 SDELF or CorZ SDERF 05 04 03 05 04 03 05 04 03 05 04 03 05 04 03 05 04 03 SDELF or CorZ SDERF 05 04 03 05 04 03 05 04 03 05 04 03 SDELF 05 04 03 or 05 04 03 SDERF
53. ant to air water heat exchangers reversing valve body and refrigerant metering device for ten 10 years from the Warranty Inception Date as defined below 4 Other accessories and parts built or sold by MG when installed and purchased with MG Units for five 5 years from the date of shipment from MG b Other accessories when purchased separately for 1 year from the date of shipment from MG The Warranty Inception Date shall be the date of original unit installation as per the date on the installation Startup Record or six 6 months from date of unit shipment from MG whichever comes first To make a claim under this warranty parts must be returned to MG in Petitcodiac New Brunswick freight prepaid no later than ninety 90 days after the date of the failure of the part If MG determines the part to be defective and within MG s Limited Express Residential Warranty MG shall when such part has been either replaced or repaired return such to a factory recognized distributor dealer or service organization freight prepaid The warranty on any part repaired or replaced under warranty expires at the end of the original warranty period LIMITED EXPRESS RESIDENTIAL WARRANTY LABOUR This Limited Express Residential Labour Warranty shall cover the labour incurred by MG authorized service personnel in connection with the installation of a new or repaired warranty part that is covered by this Limited Express Residential Warranty only to
54. applications There are two 1 2 openings with plastic grom mets grommet hole is 3 8 in the upper section of the electrical box one for the thermostat connections and one for the op tional plenum heater connections A schematic diagram and electrical box layout diagram ELB can be found inside the electrical box cover of the unit as well as in the Model Specific section of this manual The Electri cal Tables in the Model Specific section and the ELB diagram contain information about the size of wire for the connections as well as the recommended breaker size A properly qualified electrician should be retained to make the connections to the heat pump and associated controls The connections to the heat pump MUST CONFORM TO LOCAL CODES CIRCULATOR PUMP MODULE WIRING GROUND LOOP ONLY The heat pump has provisions for connecting the circulator pump module so that the pumps will be turned on whenever the compressor operates Connect the circulator pump module to the appropriate two terminals of the terminal strip marked OUTDOOR CIRCULATORS in the heat pump as per the volt age of the circulator pump module Ensure that the total current draw does not exceed the value indicated on the label in the heat pump electrical box Refer to the electrical box drawing on the electrical box cover for more information THERMOSTAT REQUIREMENTS The RH Series unit requires a three stage heating and two stage cooling thermostat for proper operation
55. ated Area for Ground Loop Systems Page 11 Table 5 Heat Pump Size vs Heated Area for Ground Water Systems Page 11 Table 6 Heat Pump Size vs Hot AIF Grills 2 Page 12 Table 7 Plenum Heater inii Page 12 Table 8 DUCT SIZING GUE Page 14 Table 9 Required Flow and Air Tank Sizing Page 15 Table 10 Antifreeze Percentages by Volume Page 19 Table 11 Volume of Fluid 100ft Of Pipe Page 19 Table 12 Refrigerant Charge Chart 2 2 1 4 2 Page 36 Table 13 Shipping INTOMMALION E D eons Page 36 Table 14 Standard Capacity Ratings Ground Loop Heating 60Hz Page 36 Table 15 Standard Capacity Ratings Ground Water Heating 60Hz Page 36 Table 16
56. ble to connect M Pn Electrical AR1 2 to dry contacts Fan 111 2 speed can be reduced by 15 for zone applications Control Board Plenum Heater Wiring Use an 18 2 conductor cable to connect Electrical 1 to Plenum Heater C 1 1 208 230 24VAC Transformer 75VA Outdoor Circulator Pumps Ground Loop e _ REFER TO LABEL IN UNIT FOR MAX AMPS Outdoor 2218 Connect 115VAC circulators to 115V Circulator Connect 230VAC circulators to 230V Pumps 2 Field Connect Gnd to Gnd Lug Relay Wiring 230VAC Domestic Hot water Circulator Pump Instructions HACW Note If heat pump is to be operated without the hot water circulator connected to the water tank and flooded with water remove the brown wire with the insulated terminal located here This pump is water lubricated Gnd Lug and must not be run dry 115VAC Compressor Contactor 230 115VAC CONNECTIONS Heat Pump Electrical Service Requirements 230VAC Single Phase 60Hz 230 1 60 Wire Colour Label Contactor Model Min Circuit Min Wire TD Fuse or L2 Red L2 3 Size Ampacity Gauge Breaker N White N 2 25 22 10 3 30 L1 Black L1 1 4
57. call for auxiliary or emergency heat from ther mostat Faulty thermostat Faulty thermostat Measuring L1 to ground and L2 to ground both yield 115VAC but L1 to L2 yields OVAC Verify that the thermostat is indicating that auxiliary or emergency heat should be on Thermostat doesn t indicate a call for auxiliary or emergency when it should Thermostat indicates auxiliary or emergency but no 24VAC signal pre sent across C and the auxiliary and or emergency pin at the thermostat Correct wiring Set thermostat to engage auxil iary or emergency heat note some thermostats require a jumper between auxiliary and emergency Check the thermo stat manual Replace thermostat Replace thermostat Faulty thermostat wiring Plenum Heater trans former is burned out No 24VAC signal from C to ground at the plenum heater control connector Plenum heater control board is faulty No 24VAC signal from 1 to ground at the plenum heater control connector Faulty wiring 24VAC signal is present across C and the auxiliary and or emergency pin at the thermostat but no 24VAC signal is present across W2 and C at the heat pump terminal strip Voltmeter does not show 24VAC across transformer secondary wind ing 24VAC present across C and ground at the plenum heater but not across ground of the plenum heater and of the heat pump terminal strip Correct wiring Replace transformer Transforme
58. cate which type of fault or lockout has occurred If pressure Fault or lockout occurs tre 4tatus LED wil blink once Ir low pressure fault orc lockout occurs the status LED wil blink twice If a flow swith fault occurs the status LED wil blink three times Dimensions i a 91 H Mes uc J fo F t 2 1250 enn ei _ 4010 zm 5 1 ei s zr px gi vela 35 a az 1 t 3 Ed be Le nik P f 1 vm a B AX 0 REL L seu S STATUS JeF FALAT e h 100 Specifications Voltage 18 to 30 Frequency 50 to 60 Output Type Solid state Triac Rating 0 30 Fault Relay SPDT Rating 1 amp 30 Time Delay Antl short cycle time S rminutes fixed 2096 5 second test mode Mechanical Board dimensions 3 5 x 3 25 x 1 Mounting Surface mount using 4 6 or screws Wiring Diagram HPS High Pressure Switch Flow Flow Switch ac 000821 01 56 ISSUE 02 08 OCT 2010 APPENDIX B ECM Fan Airflow Tables NOMINAL AIRFLOW S
59. d do not unplug the connector Circulation Grey pin 15 Stage 1 Yellow pin 6 Stage 2 Yellow Black 14 Stage 3 Violet pin 2 If proper signal isn t present re place Fan Control Signal Har ness proper signal is present replace fan motor head Repair any loose connections If proper signal isn t present re place Fan Control Signal Har ness If proper signal is present replace fan motor head Fan Power Harness faulty Or Faulty motor Insert the tips of the voltmeter probes into the back of the connec tor at the fan to measure the voltage across the red and black wires value should be 230VAC Page 30 Replace Power Harness 11 230VAC is not present replace motor if 230 is present ISSUE 02 08 OCT 2010 PLENUM HEATER TROUBLE SHOOTING Faut Possible Cause Recommended Action No 230VAC Disconnect switch open Verify disconnect switch is in the ON Determine why the disconnect across plenum if installed heater L1 and L2 Fuse blown Breaker Tripped At plenum heater disconnect box if installed voltmeter shows voltage on the line side but not on the load side Check if breaker is tripped switch was opened if all is OK close the switch Reset breaker or replace fuse at plenum heater disconnect box Replace fuse with proper size and type Time delay type D Same Line to L1 and L2 No W2 signal at Heat pump termi nal strip No
60. e supply source Attempting to return the water to the source well will eventually cool the water so much that the heat pump will shut off on its low pressure safety control Acceptable methods for disposing of the waste water are listed below The waste water is clean the heat pump has no other effect than reducing the temperature of the water Refer to the Ground Water Disposal methods diagram for typical disposal method diagrams e Second well return well e Percolation Drain ditch leaching field e Pond river or stream ENSURE SELECTED METHOD CONFORMS TO LOCAL CODES ISSUE 02 08 OCT 2010 A return well should be a minimum of 80 ft from the supply well for residential applications The water returned to the well will not necessarily be pumped into the same aquifer ing on underground conditions The return well must be able to supply at least the same quantity of water as the amount you wish to recharge into it If the static level level when not being pumped of a well is high 10 to 20 ft from the surface it may be necessary to place a well cap on the well to keep the return water from flowing out the top of the well This cap is commonly required since a certain amount of pressure is needed to force the return water back down the well if the static level is high Water discharged by percolation will generally soak into the ground within a distance of 50 to 100 ft If suitable care is taken to ensure that th
61. e drain pipe runs downhill and the end of the pipe is protected by a bale of hay or spruce bows etc the end of the pipe will not freeze as the pipe will empty out when the heat pump shuts off and the water valve closes When snow comes it will usually cover the entire process much like a small spring It is recommended that the pipe be below the frost line when possible for maximum freeze protec tion When discharging into a river or stream or above the surface of a pond the same guidelines should be followed as described in the paragraph above for the percolation method When discharging the waste water below the surface of a pond the discharge pipe should be placed below the frost line to prevent the pipe from freezing As opposed to the percola tion method water will remain in the end of the pipe It is rec ommended that the surface of the pond be lower than the instal lation location of the heat pump where practical This reduces the back pressure generated by the weight of the water in the Typical Ground Water Installation for Size 25 75 Heat Pumps for Units With Brass FPT Fittings TACO 24VAC EBV Electronic Ball Valve NOTE Refer to the heat pump labels HEAT PUMP for connection locations CONNECTIONS Connect the harness plug to the connector inside the heat ELECTRICAL CONNECTOR N C WIY E E OUTDOOR OUT SUPPLY OUT 1 Brass FPT 1 Line NOTE Remove valve NOTE Dole valves can be quite n
62. e heated Supply grills should be placed under a window when possible to help prevent condensation on the window As mentioned in the pre vious sub section supply grill leads should be 6 in diameter 28 sq in each to allow 100cfm of air flow In a typical new construction there should be one supply grill for every 100sq ft of area in the room When rooms require more than one grill they should be placed in a manner that pro motes even heat distribution such as one at each end of the room It is always a good idea to place a damper in each grill supply or place adjustable grills so that any imbalances in the heat distribution can be corrected The total number of supply grills available is based on the heat pump nominal airflow TABLE 6 shows the number of grills available per heat pump size TABLE 6 Heat Pump Size vs Hot Air Grills Return grills should be mounted on the floor At minimum they should be the same size as the supply grill it is highly recommended that they be 25 to 50 larger than the total supply They should be placed opposite the supply grills when possible to ensure distribution across the room For rooms re quiring more than one supply grill it may be possible to use one larger return grill if it can be centrally positioned opposite of the supply grills however it is preferred to have one return for each supply to maximize heat distribution across the room THERMOSTAT LOCATION Most homes are a
63. e in Cooling 78 2 Stage 2 Heat Cool Compressor T 7 STATUS d 1 1 L 52 Solenoid _ 1 High em 2 Airflow Reduction Wiring Coe Use 18 2 conductor cable to connect EM 1 Electrical Box AR1 2 10 dry contacts Fan P enum m speed be reduced by 15 for zone Heat Control Board ee Relay applications A Plenum Heater Wiring b Use 18 2 conductor cable Comp to connect Electrical 1 to Start Plenum Heater C 1 11 1 208 230 24VAC Transformer 75VA _ Outdoor Circulator Pumps Ground Loop 5 Outdoor REFER TO LABEL IN UNIT FOR MAX AMPS gt Circulator Connect 115VAC circulators to 115V Field 2 Pumps Potental Connect 230VAC circulators to 230V Wiring P Relay Connect Gnd to Gnd Lug 230VAC Label 115VAC 12 Domestic Hot water Circulator 12 Pump Instructions HACW N Note If heat pump is to be L1 operated without the hot water Gnd oO circulator connected to the water tank and flooded with water remove the brown wire with the insulated terminal located here Gnd Lug This pump is water lubricated and must not be run dry Heat Pump Senice Requirements CONNECTIONS Model Min Circuit Min Wire TD Fuse or Wire Colour Label Contactor ue Ampacity c us L2 Red L2 3 45 33 8 3 40 AA M 2 55 39 6 3 50 L1 Black L1 1
64. e is required in obtaining warranty performance write or call Maritime Geothermal Ltd Customer Service PO Box 2555 Petitcodiac New Brunswick E4Z 6 4 506 756 8135 or e mail to info nordicghp com NOTE Some states or Canadian provinces do not allow limitations on how long an implied warranty lasts or the limitation or exclusions of consequential or incidental damages so the foregoing exclusions and limitations may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to state and from Canadian province to Canadian province Please refer to the MG Installation Installation and Service Manual for operating and maintenance instructions An extended warranty option is also available Please contact Maritime Geothermal Ltd via the contact information in the previous paragraph for more information
65. e lockout control Pressure flow switch monitoring Alarm output during lockout 5 minute anti short cycle delay 5 second test mode LED fault codes for lockout status Test mode for reduced test time Conformally coated for moisture protection Lockout Protection Module Mode of Operation The contro will begin the S minute time delay upon a Y call from the therrmosat After the time delay expires the compressor contactor Will be energized as long as the high and low switches are closed either switch is open after the delay expires the compressor will not energize either switch opens while the compressor is energized it will irmmeciately and begin the anti short cycle delay compressor will not be allowed to en again until the anti short cycle delay expires and both pressure switches closed The flow switch will have 30 second bypass timer in which the control will ignore an open flow switch for the first 30 seconds if the flow switch remains open after the 30 second timor expires the unit will de energize the compressor and begin the anti snort cycie delay If the control experiences threw high pressure low pressure or fow switch faults in 60 minuto period it will lockout the compressor and energize the fault output A manual reset of power will be required to reset tne lockout condition The control has status LED to indi
66. e used The installation of P T plugs pressure temperature pronounced Pete s plugs is recommended on both the entering and leaving lines at the heat pump see Diagram A DIAGRAM A Typical P T Pete s Plug amp Thermometer Stems P T Plugs Pete s Plug Gage Adaptor GAGE THE PRESSURE Protective Cover 3 VALVE POCKET FOR ADDED PRESSURE PROTECTION ISSUE 02 08 OCT 2010 Page The P T plug will allow the installer or homeowner to check water flow through the loop by measuring the pressure difference through the heat exchanger and comparing it to that listed in the Model Specific Information section or the specifications document Optional fittings with P T ports are available for the circulator pump modules sold by Maritime Geothermal Ltd FLUSHING amp PURGING THE GROUND LOOP Once the groundloop has been installed and all connections are completed between the heat pump circulator pump module and ground loop the entire ground loop system should be pressure tested with air to 100 PSIG to make sure there are no leaks on any of the inside fittings Soap all joints and observe that the pressure remains constant for 1 hour When satisfied that all connections are leak free release the air pressure and connect a purge cart See Diagram B to the flushing access ports at the pump module refer to drawing 000906CDG A temporary flushing system can alternately be constructed using a 45 gal barre
67. eat It should be be Adjust to obtain 8 12 F closed tween 8 12 F 3 6 C Superheat will 8 6 C superheat be high if TXV Is closed too far stuck almost closed Adjusting the T XV does not affect the Adjust the all the way in and or partially blocked by for superheat or the suction pressure out a few times to loosen it Re eign object place TXV if this does not work Filter drier plugged Feel each end of the filter drier it Replace filter drier should be the same temperature If there is a temperature difference then itis plugged Also causes low suc tion pressure Unit is overcharged High sub cooling low delta T across Remove 1 2lb of refrigerant at a Only possible if unit has air coil time and verify that the discharge been opened in the field pressure reduces and incorrectly charged Low Suction Low or no Outdoor liquid Delta T across the Outdoor Loop Determine the cause of the flow Pressure flow ports should be between 5 7 F restriction and correct it 3 4 C or compare pressure drop to Verify pumps are working and the tables for the unit sized correctly for ground loop systems Verify well pump and water valve is working for ground water sys tems Entering liquid tempera Measure the entering liquid tempera Increase the size of the ground ture too cold ture Most likely caused by under loop sized ground loop Dirty or fouled coaxial Disconnect the water
68. efrigerant Two stage units offer a significant efficiency increase over single stage units when operating in the reduced capacity mode stage 1 The RH Series has a compact horizontal case design with corner mounts allowing it to be suspended from the ceiling if desired The fan is mounted to an access panel and can easily be switched from straight through to end discharge configura tion An electrically commutated ECM fan with several speed options is standard The motor has a soft start function for im proved efficiency and reduced wear The unit has several key features that are described in the specifications document for the particular heat pump Please request a copy if desired or visit www nordicghp com UNPACKING THE UNIT When the heat pump reaches its destination it should be unpacked to determine if any damage has occurred during shipment Any visible damage should be noted on the carrier s freight bill and a suitable claim filed at once The heat pump is well constructed and every effort has been made to ensure that it will arrive intact however it is in the customer s best interest to examine the unit thoroughly when it arrives OPTIMUM PLACEMENT For liquid to air units to achieve the greatest efficiency the heat pump should be centrally located in the home with respect to the conditioned space This design provides the utmost in economy and comfort and usually can be accomplished in harmony with the design of t
69. erature differential again to ensure there is flow from the circulator Cooling Mode 1 Set the thermostat to cooling mode and adjust the setpoint to activate Stage 1 and Stage 2 2 Monitoring the refrigeration gauges while the unit runs Record the following after 10 minutes of runtime 3 1 Suction pressure 2 Discharge pressure Duct Return temperature Duct Supply Out temperature Duct Delta Outdoor Loop In Supply In temperature Outdoor Loop Out Supply Out temperature Outdoor Delta T 3 00 Adjust the thermostat setpoint to the desired room temperature if possible otherwise set it just low enough to allow the unit to run ie 1 F 0 5 C less than room temperature and let the unit run through a cycle Record the thermostat setpoint and the suction pressure when the unit shuts off Final Inspection 1 2 3 4 Turn the power off to the unit and plenum heater if installed and remove all test equipment Install the electrical box cover and the access panel on the heat pump Install the service port caps securely to prevent refrigerant loss Install the electrical cover on the plenum heater if applicable Do a final check for leaks in the ground water ground loop system and ensure the area is clean Turn the power on to the unit and the plenum heater if installed Set the thermostat to the final settings Startup Record 1 The startup personnel shall sign and date the Startu
70. fter written notice to MG s factory in Petitcodiac New Brunswick of each defect mal function or other failure and a reasonable number of attempts by MG to correct the defect malfunction or other failure and the remedy fails of its essential purpose MG shall refund the purchase price paid to MG in exchange for the return of the sold good s Said refund shall be the maximum liability of MG THIS REMEDY IS THE SOLE AND EXCLUSIVE REMEDY OF THE BUYER OR PURCHASER AGAINST MG FOR BREACH OF CONTRACT FOR THE BREACH OF ANY WARRANTY OR FOR MG S NEGLIGENCE OR IN STRICT LIABILITY LIMITATION OF LIABILITY MG shall have no liability for any damages if MG s performance is delayed for any reason or is prevented to any extent by any event such as but not limited to any war civil unrest government restrictions or restraints strikes or work stoppages fire flood accident shortages of transportation fuel material or labour acts of God or any other reason beyond the sole control of MG MG EXPRESSLY DISCLAIMS AND EXCLUDES ANY LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGE IN CONTRACT FOR BREACH OF ANY EXPRESS OR IMPLIED WARRANTY OR IN TORT WHETHER FOR MG s NEGLIGENCE OR AS STRICT LIABILITY OBTAINING WARRANTY PERFORMANCE Normally the dealer or service organization who installed the products will provide warranty performance for the owner Should the installer be unavailable contact any MG recognized distributor dealer or service organization If assistanc
71. has been calculated and the appropriate amount of antifreeze is ready for addition by referencing TABLE 10 drain the equivalent amount of water from the flush cart or mixing barrel and replace it with the antifreeze When using alcohols be sure to inject below the water line to reduce initial volatility of the pure antifreeze If the loop 15 large it may be necessary to refill the tank with antifreeze 000821MAN 01 Page several times to get all the antifreeze into the loop Pump the loop for 5 to 10 minutes longer to ensure the remaining fluid has been well mixed TABLE 11 Volume of fluid per 100 ft of pipe 1 1 2 9 2 Type of Pipe Copper Rubber Hose 1 3 4 IPS SDR11 2 3 1 IPS SDR11 1 1 4 IPS SDR11 1 1 2 IPS SDR11 9 1 10 9 Other Item Volumes Heat Exchanger Average 1 2 1 5 5 7 Purge Cart Tank See cart manual TBD INITIAL PRESSURIZATION At this point open all valves in the flow circuit and slowly close off the supply and return flush cart valves in a manner that leaves about 20 30 psig on the system If an air bladder expansion tank is used it should be charged to the above pressure before actual water pressure is put on the system Systems without an expansion tank will experience greater fluctuations in pressure between the heating and cooling seasons causing pressure gauges to have different values as the loop temperature changes This fluctuation is normal since expa
72. he home A heating system cannot be expected to produce an even warmth throughout the household when it is located at one end of the structure and the warm air is transmitted with uninsulated metal ductwork If possible the access panels should remain clear of obstruction for a distance of two feet to facilitate servicing and general maintenance DO NOT STACK UNITS ON TOP OF EACH OTHER The cases are not designed to hold the weight of another unit Stacking should only be done with a proper rack system able to hold a minimum of 2x the weight of the unit Raising the heat pump off the floor a few inches is generally a good practice and also helps prevent rusting of the bottom panel of the unit We recommend that the heat pump be placed on a piece of 2 thick styrofoam The styrofoam will smooth out any irregularities in the cement floor and deaden any compressor noise emitted from the bottom of the cabinet If the unit is to be suspended ensure that the mounting sys tem can hold at least 2 times the weight of the unit for safety reasons NORDIC heat pumps have an air filter rack which can be installed with the removable end where the filter is inserted on either side to facilitate changing the filter 000821MAN 01 Page 6 ELECTRICAL CONNECTIONS The heat pump has a concentric 1 093 0 875 knockout for power supply connection to the electrical box as well as one for connection to the circulator pump module for ground loop
73. ion Pressure may appear to not be pumping TXV adjusted too far open High sub cooling low delta T across water coil Verify superheat It should be be tween 8 12 F 3 6 C Superheat will be low if TXV is open too far Remove 1 2lb of refrigerant at a time and verify that the discharge pressure reduces Adjust TXV to obtain 8 12 F 3 6 C superheat TXV stuck open Leaking reversing valve Low Suction Air Flow Pressure TXV stuck almost closed or partially blocked by for eign object Low or no refrigerant charge Faulty compressor not pumping See Low Suction Pressure in this section Compressor frosting up TXV stuck almost closed or partially blocked by for eign object TXV frosting up Random Low Pressure trip does not occur while there Faulty compressor contacior Intermittent fan ISSUE 02 08 OCT 2010 Adjusting the TXV does not affect the superheat or the suction pres sure Low super heat and dis charge pressure Reversing valve is the same tem perature on both ends of body common suction line is warm com pressor is running hot See Fan Troubleshooting section Note low airflow will cause the air coil to ice up once the suction drops below 90PSIG Adjusting the TXV does not affect the superheat or the suction pres sure be frosting up Entering air temperature and air flow are good but suction is low Check static refrigerat
74. ion pressure of unit for very low value Pressures change only slightly from static values when compressor is started Adjusting the TXV does not affect the superheat or the suction pres sure Points pitted or burned Contactor sometimes sticks causing the com pressor to run without the fan trip ping the low pressure control Page 29 Adjust the TXV all the way in and out a few times to loosen it Replace TXV if this does not work Replace reversing valve Correct the problem Adjust the TXV all the way in and out a few times to loosen it Re place TXV if this does not work Locate the leak and repair it Spray nine a sniffer and dye are common methods of locating a leak Replace compressor Adjust the TXV all the way in and out a few times to loosen it Replace TXV if this does not work Replace contactor See Fan Troubleshooting section Correct the problem 000821 01 FAN TROUBLESHOOTING Possible Cause Verification Recommended Action Low Airflow Fan operating on wrong Stage speed Fan not operat ing or operating intermittently 000821MAN 01 Dirty air filter Inspect Replace Dirty air coil Poor Ductwork Air flow selected on Tap Board 15 too low Inspect Measure delta T between supply and return ducts at the unit it in heating mode it should not be above 30 F 17 C Check selection on Air Flow Tap Board Clean The ECM fan
75. ired part 3 Transportation costs of the defective part from the installation site to MG or of the return of that part if not covered by MG s Limited Express Residential Warranty 4 The costs of normal maintenance m X This Limited Express Residential Warranty applies to MG Residential Class products manufactured on or after February 15 2010 MG S LIABILITY UNDER THE TERMS OF THIS LIMITED WARRANTY SHALL APPLY ONLY TO THE MG UNITS REGISTERED WITH MG THAT BEARS THE MODEL AND SERIAL NUMBERS STATED ON THE INSTALLATION START UP RECORD AND MG SHALL NOT IN ANY EVENT BE LIABLE UNDER THE TERMS OF THIS LIMITED WARRANTY UNLESS THIS INSTALLATION START UP RECORD HAS BEEN ENDORSED BY OWNER amp DEALER INSTALLER AND RECIEVED BY MG LIMITED WITHIN 90 DAYS OF START UP Limitation This Limited Express Residential Warranty is given in lieu of all other warranties If not withstanding the disclaimers contained herein it is determined that other warranties exist any such express warranty including without imitation any express warranties or any implied warranties of fitness for particular purpose and merchantability shall be limited to the duration of the Limited Express Residential Warranty LIMITATION OF REMEDIES In the event of a breach of the Limited Express Residential Warranty MG will only be obligated at MG s option to repair the failed part or unit or to furnish a new or rebuilt part or unit in exchange for the part or unit which has failed If a
76. l and a pump with sufficient volume and head capability to circulate fluid at a velocity of at least 2 ft min through all parts of the loop DIAGRAM B Typical Purge Cart Adjust the circulator pump module valves to connect the purge cart to the ground loop Begin pumping water through the ground loop ensuring that the intake of the pump stays submerged at all times by continuously adding water Water flowing back from the return line should be directed below the water level in the barrel or flush tank to prevent air being mixed with the outgoing water 17 000821MAN 01 Once the lines have been filled and no more air bubbles are appearing in the line adjust the circulator pump module valves to circulate water through the heat pump using the same technique as described above When all air is removed reverse the flow of water through the lines by interchanging the flush cart lines and purge again You will be able to visibly tell when all air is removed ADDING ANTIFREEZE SOLUTION In most mid and northern areas of the US and in all of Canada it is necessary to condition the loop fluid by the addition of some type of antifreeze solution so that it will not freeze during operation in the winter months This antifreeze is required because the loop fluid will normally reach a low entering temperature of 28 F to 32 F 2 C to 0 C and refrigerant temperatures inside the heat pump s heat exchanger may be as low as 20 F 11 C coole
77. lve is installed and properly oriented in the return line 2 Verify that there is flow control in the return line Domestic Hot Water if equipped 1 Verify that all shutoff valves are fully open and there are no restrictions in the piping from the heat pump to the domestic hot water tank 2 Verify that the entire system has been flooded and all the air has been purged as much as possible Further purging may be required after the system has been operating for a while 3 Verify that the brown wire with the insulated terminal is disconnected in the electrical box Refer to the schematic diagram for more information Electrical 1 Ensure the power to the unit is off Ensure the power to the plenum heater is off if equipped 2 Verify all high voltage connections Ensure that there are no stray wire strands all connections are tight and the ground wire is connected tightly to the ground connector for the heat pump and plenum heater 3 Record the fuse circuit breaker size and wire gauge for the heat pump Record the fuse circuit breaker size wire gauge and size of the plenum heater if installed 4 Verify that the control connections to the thermostat and plenum heater if installed are properly connected and all control signals are off so that the unit will not start up when the power is turned on 5 Ensure all access panels except the lower one that provides access to the electrical box are in place 000821MAN 01 Page 20 ISSUE 02 0
78. mp module CIRCULATOR PUMP MODULE Maritime Geothermal Ltd has compact pump modules with built in three way valves to facilitate filling and purging the ground loop Refer to drawing 000906CDG at the end of this section Alternatively Grundfoss Model UPS 26 99 or Taco Model 0011 pumps or other brands with similar pumping capability may be used The single pump module will typically handle systems up to 3 tons model sizes 25 45 the two pump module will typically handle 4 to 6 ton systems model sizes 55 65 75 This is based on a typical parallel system with one circuit per ton Maritime Geothermal recommends calculating the total pressure drop of the ground loop including headers indoor piping and heat pump exchanger drop based on the antifreeze type and concentration at the desired minimum loop temperature A pump module that can deliver the flow required for the unit at the calculated total pressure drop should be selected Refer to the Model Specific Information section for unit flow requirements Loop pressure drops can be calculated using software such as those mentioned in the Horizontal Ground loops section or can be calculated in a spreadsheet using the pipe manufacturer s pressure drop tables for pipe diameter and fittings The circulator pump module must be connected to the heat pump Outdoor Loop ports with a lineset suitable for the flow required with minimum pressure drop 1 rubber or plastic lines should b
79. n of the thermostat will maintain the temperature setting of the thermo Stat The plenum heater is powered separately from the heat pump Only two control wires are needed to connect the ple num heater to the heat pump Refer to the label on the plenum heater or the electrical box diagram on the inside of the electri cal box cover of the unit for details on the connections The plenum heater should be mounted in the supply duct in a manner that allows all of the airflow to pass through it to prevent any hot spots in the heater elements TABLE 7 shows the recommended size plenum heater as well as the wire size and breaker size needed to provide power to the plenum heater TABLE 7 Plenum Heater Sizing Heat Pump Page 11 CONDENSATE DRAIN The unit comes equipped with a 3 4 PVC socket fitting female labeled Condensate Drain This drain allows the con densate which forms during the air conditioning cycle to be re moved from the unit The drain should be connected as per local codes During high humidity weather there could be as much as 25 gallons of water formed per day Care should be taken in the spring to ensure that this pipe is not plugged with dust that has collected during the winter caus ing the condensate to overflow into the bottom of the heat pump and onto the floor The condensate drain must be externally trapped and proper venting is required external to the heat pump as well Refer to local c
80. ndicator or relay can be connected across the FAULT pin and ground if external signal ing is desired Should a fault occur the LED will flash the code of the fault condition while the safety control in question is open The codes are shown in TABLE 3 The control board will lock out the compressor for five minutes when a fault occurs Three retries per fault condition are allowed within a 60 minute period If the fault condition occurs a fourth time the control board will permanently lock out the compressor and energize the FAULT pin This can only be reset by powering down the unit The LED will flash the fault code until the unit is reset If the control board enters permanent lockout mode there is a serious problem with the system and it must be rectified if the unit is to maintain good service 000821MAN 01 TABLE 3 Control Board Fault Codes Fault High Pressure Low Pressure Flow WARNING REPEATED RESETS OF A LOW PRES SURE LOCKOUT COULD CAUSE THE HEAT CHANGER TO FREEZE AND RUPTURE DESTROY ING THE HEAT PUMP AND VOIDING THE WAR RANTY DOMESTIC HOT WATER CONNECTIONS HACW ONLY A typical piping diagram for a pre heat tank two tank con figuration can be found in drawing 000970PDG at the end of this section Be sure to note the position of the check valve and the direction of water flow Other configurations are possible and there may be multiple units tied together in larger buildings W
81. ns Thermostat W2 signal LLL 15 APR 07 170 Plantation Rd Petitcodiac NB ms GEOTHERMAL Chris Geddes 15 07 5 MARITIME E4Z 6 4 ai 0 rawing Name 25 WAY 09 15 APR 07 GEDDES 25 04 eris Geddes Size Drawing Number REV SHEET APVD BY A 000683SCH 02 1 of 1 ISSUE 02 08 OCT 2010 Page 45 000821MAN 01 ELECTRICAL DIAGRAMS 230 1 60 continued RH Series Electrical Box Diagram 230 1 60 Two Stage Scroll ECM Fan Left Return Low Voltage Wiring 24VAC Airflow Field Reduction T stat Connections Thermostat Wiring Wiring Thermostat Plenum Heat Use an 18 8 conductor cable to connect this 24 Connections Connections unit to the thermostat 24VAC Common C G Way YARAR 1 G Fan Y1 Stage 1 Heat Cool Compressor RH 24VAC Hot Diode L Trouble if available on thermostat W2 Stage 2 Heat Plenum Heater O B W1 Reversing Valve Activ
82. nsion and contraction of the loop fluid must be handled by the elasticity of the plastic loop Polyethylene Pressurize the loop to a static pressure of 45 psig when installing a system in the fall going into the heating season Pressurize the loop to a static pressure of 25 psig when installing a system in the spring or summer going into the cooling season After operating the heat pump for a period of time any residual air in the system should be bled off and the static pressure should be verified and adjusted if necessary Add additional water antifreeze mix with the purge cart to bring the pressure back to the original setting if required PIPE INSULATION All ground loop piping inside the structure between the structure entry point and the heat pump should be insulated with 3 8 thick closed cell pipe insulation to prevent condensation and dripping onto floors or walls 18 ISSUE 02 08 OCT 2010 Geo Flo Circulator Pump Module Installation Units with Brass FPT Fittings Air Bladder 2911 1 to 1 1 4 PE Socket Tank Optional Pressure Gauge 0 60PSIG Boiler 1 Fill amp Purge access ports 2914 Camlocks can be used e Drain for quick connections Fittings can removed and reused on other jobs when purging is complete Boiler Connect wiring to appropriate voltage terminals marked 1 B OUTDOOR CIRCULATORS in day _ heat p
83. o hot water tank why Reset button tripped on Check voltage at elements with Push reset button hot water tank multimeter Insufficient hot Circulator pump Visually inspect the pump to see if Replace if faulty water operating shaft is turning Use an amprobe to Heat Pump measure current draw rroblem Blockage or restriction in Check water flow and power to Remove obstruction in water the water line or hot water pump Check water lines for lines Acid treat the domestic hot heat exchanger obstruction water Faulty DHW cutout failed Check contact operation Should Replace DHW cutout if faulty open close at 120 F and open at 140 F Heat pump not running Note the amount of time the heat Temporarily turn up the tank enough hours to make pump runs in any given hour thermostats until colder weather sufficient hot water creates longer run cycles Water is too hot Faulty DHW cutout failed Check contact operation Should Replace DHW cutout if faulty closed close at 120 F and open at 140 F Thermostat on hot water Visually inspect the setting Readjust the setting to 120 F tank set too high Should 140 F if required by local code be set at 120 F 140 F if required by local code Dole flow control Valve The Dole flow control is a simple self cleaning device designed to deliver a constant Multimeter volume of water from any outlet whether the Voltmeter pressu
84. odes to ensure the installation is done properly Drawing 000822CDG shows a typical installation 000821MAN 01 Typical Duct and Condensate Ducts should be sized as per the Duct Sizing table in this manual Use turning Radii for all bends in supply and return ducts Flexible Duct Collar Air filter Flexible Duct Collar minimum 12 above plenum heater elements if installed Optional Electric Plenum Heater xN Hot Air Out Supply Turning Hot Air Out Supply Mounting points for suspension installations Accoustic insulation may be used inside the ducts near the unit to dampen any air noise that may be present Ensure there is no insulation within 12 of the plenum heater if installed Approved By Chris Geddes ECO IMPL BY APVD BY DATE 000821MAN 01 2 thick styrofoam required if unit is not suspended Chris Geddes 02 SEP 08 Chris Geda 162 SEP 08 ris Geddes 02 SEP 08 12 Connections Horizontal Case Cold Air In Return Filter Rack Can be mounted to the left or right Minimum decline of 1 8 per foot Condensate Drain 3 4 PVC Socket 12 Venting be required refer to local building code 170 Plantation Rd Petitcodiac NB MARITIME GEOTHERMAL Typical Duct and Condensate Connections Horizontal Case Size Drawing Number REV SHEET 000822
85. oisy Placing a the optional ball valve approximately two feet from the Dole valve can reduce the noise level Alternately the Dole valve can be placed outside the home Dole Valve Recommended To for Flow Setting a Well ie Ditch 1 Ball Pond head and manually place Valve Etc the valve in the open position before soldering P T Plugs OUTDOOR IN SUPPLY IN 1 Brass FPT 1 Line 1 Ball It is recommended that either unions or boiler drains be installed to provide connection points for flushing the coaxial exchanger should it need to be cleaned due to scaling optional Air Bladder Tank Pressure b gt Pressure Gauge Switch 0 60PSIG gt From Well Pump HEAT PUMP Air Bladder Tank Size MODEL SIZE USGAL Litres 25 To House Based on 2 minute well pump run time A larger tank may be used if a longer run time is desired TACO 24VAC Slow Close Water Valve Connect the harness plug to the connector inside the heat pump ELECTRICAL NOTE Remove the head from the valve before soldering the valve in place NOTE Ensure the 5 pin is installed in the proper orientation as shown here when re installing the head Generic 24VAC Solenoid Water Valve Connect the harness plug to the connector inside the heat pump ELECTRICAL CONNECTOR a Piping is as shown
86. ommon method of regulating the flow is by the use of a DOLE Valve This valve will automatically control the amount of water flowing through it by varying the diameter of a flexible rubber orifice through which the water passes This minimizes the water usage of the unit and also prevents exces sively low discharge pressure when in cooling mode Dole valves can be noisy it is recommended that they be installed outside if possible Optionally a water flow meter can be installed in the dis charge line so that the exact amount of water flowing can be determined at a glance It should be placed between the Out door OUT Supply OUT pipe of the heat pump and the water valve With Proper flow there should be 5 7 3 4 C delta T be tween the IN and OUT water temperatures of the heat pump when operating in the heating mode All water line valves on both the supply and discharge lines should be either BALL or GATE valves GLOBE valves have a higher pressure drop meaning more pumping power to maintain the required flow to the heat pump PIPE INSULATION All ground water piping to and from the Outdoor Loop ports on the heat pump should be insulated with 3 8 closed cell pipe insulation to prevent condensation and dripping onto floors or walls WATER DISCHARGE METHODS Water disposal methods vary from area to area However some consideration should be made to prevent the cooled discharge water from immediately coming in contact with th
87. oo warm Dirty or fouled coaxial heat exchanger typically for ground water unlikely for ground loop Verify that there is 24VAC across O B W1 and C of the terminal strip when calling for cooling Verify solenoid by removing it from the shaft while the unit is running There should be a loud whoosh sound when it is removed A click can be heard when the is energized but the unit continues to heat instead of cool Delta T across the Outdoor Loop ports should be between 8 12 F 4 7 C or compare pressure drop to the tables for the unit Most likely caused by undersized ground loop Disconnect the water lines and check the inside of the pipes for scale deposits Page 28 Correct thermostat setup Change to a different thermostat Replace solenoid if faulty Replace reversing valve Determine the cause of the flow restriction and correct Verify pumps are working for ground loop systems Verify well pump and water valve is working for ground water systems Verify the ground loop sizing In crease the size of the ground loop if undersized Have a qualified service technician backflush the coaxial exchanger ISSUE 02 08 OCT 2010 OPERATION TROUBLESHOOTING COOLING MODE Ault Possible Cause Recommended Action High Discharge pressure Unit is overcharged Only possible if unit has been opened in the field and incorrectly charged High Suct
88. p Record and have the startup witness or appropriate site personnel sign as well The startup personnel shall leave the Startup Record with the homeowner retain a copy for filing and send a copy to Maritime Geothermal Ltd for warranty registration ISSUE 02 08 OCT 2010 Page 21 000821MAN 01 Startup Record RH Series Size 25 75 Two Stage R410a Installer Company Model Serial Province Country Installation Site City Check boxes unless asked to record data Circle data units PRE START INSPECTION Ductwork is completed dampers diverters are adjusted Registers are open and clear of objects Air filter and end cap are installed Condensate Drain is connected properly vented and free of debris Plenum heater is securely fastened if applicable Ground Loop All shut off valve are open full flow available System Loop is full and purged of air gt 5 N lt O Volum e Loop static pressure kPa Ground Water Water Valve installed in return line Flow control installed in return line Domestic Hot All shut off valves are open Water Weig ht Lines are full and purged Desuperheater pump wire is disconnected High voltage connections are correct and securely fastened gt 5 N 5 5 2 5 Circuit breaker or fuse size and wire gauge for Heat Pump A Ga Circuit b
89. panel by pulling up on the handle and then outward from the bottom 3 Repeat for the access panel with the fan mounted in it Ensure the wire harnesses are free while removing the fan 4 Disconnect the two wire harnesses and ground wire from the fan motor 5 Place the fan in front of the new location and recon nect both harnesses and the ground wire 6 Install the fan and secure with the screw 7 Install the remaining access panel and secure with the remaining screw CONTROL TRANSFORMER The low voltage controls are powered by a 75VA class Il transformer The transformer has a resettable breaker on the ISSUE 02 08 OCT 2010 Page 7 secondary side for circuit protection Should the breaker trip locate and correct the problem and then reset the breaker by pressing in on it SAFETY CONTROLS The heat pump has two built in safety controls which are designed to protect the unit from situations which could damage it should the operation of the refrigeration circuit fall outside the allowable operating range A Low Pressure Control The low pressure control monitors the compressor suction pressure and will shut the compressor down if the refrigerant evaporating pressure becomes too low risking the danger of freezing conditions in the evaporator There are 3 main reasons why this control would activate in response to the operating conditions of the unit while operat ing in heating mode 1 Low or no Outdoor loop flow
90. purge ports and blow the anti freeze solu tion into a clean 5 gallon bucket Connect a purge cart to the pump module purge ports Place 2 gallons of RYDLYME in the purge cart Circulate the fluid through the heat exchanger for at least 2 hours 3 recommended Disconnect the purge cart and dispose of the solution RYDLYME is non toxic and biodegradable and as such can be poured down a drain Clean the purge cart thoroughly Connect fresh water and a drain to the pump module purge ports and flush the exchanger for several min utes STEP 7 Blow the heat exchanger out with compressed air as per STEP 2 and dump the water down a drain Connect the purge cart to the pump module purge ports Re fill and purge the heat exchanger with as per standard procedures the anti freeze from STEP 2 can be re used Disconnect the purge cart and set the pump module valves back to the original positions STEP 10 Operate the system and check for improved performance ol ol o o 9 9 9 9 70 9 gt C9 Depending on the plumbing there should be either unions or boiler drains for to access the heat exchanger ISSUE 02 08 OCT 2010 Page 23 000821MAN 01 Troubleshooting Guide The following steps are for troubleshooting the geothermal heat pump If the problem is with the domestic hot water or the plenum heater proceed to those sections at the end of the trouble
91. r See TABLE 10 for details of freeze protection provided by different concentrations Propylene Glycol 38 30 22 15 BY WEIGHT Protection to 10 F 15 F 6 3 12 9 Methanol 16 8 13 6 10 Propylene Glycol 30 23 5 18 3 NOTE Add enough antifreeze to allow for a temperature 20 F 11 C lower than the expected lowest loop fluid temperature entering the heat pump Although many different antifreeze solutions have been employed in geothermal systems the alcohols such as methanol or ethanol have the most desirable characteristics for groundloop applications The overall heat transfer characteristics of these fluids remain high although care must be taken when handling pure alcohols since they are extremely flammable Once mixed in a typical 25 by volume ratio with water the solution 15 not flammable situations where alcohols are not allowed as a loop fluid due to local regulations then propylene glycol is a non toxic alternative which can be substituted Propylene glycol should only be used in cases where alcohols are not permitted since the heat transfer characteristics are less desirable and it becomes more viscous at low temperatures increasing pumping power The volume of fluid that your loop system holds can be closely estimated by totaling the number of ft of each size pipe in the system and referencing TABLE 11 the for approximate volume per 100 ft When the volume of the loop
92. r labels have been removed or defaced Products on which payment to MG or to the owner s seller or installing contractor is in default Products subjected to improper or inadequate installation maintenance repair wiring or voltage conditions Products subjected to accident misuse negligence abuse fire flood lightning unauthorized alteration misapplication contaminated or corrosive liquid or air supply operation at abnormal air or liquid temperatures or flow rates or opening of the refrigerant circuit by unqualified personnel Mold fungus or bacteria damage Corrosion or abrasion of the product 0 Products supplied by others 1 Products which have been operated in a manner contrary to MG s printed instructions 2 Products which have insufficient performance as a result of improper system design or improper application installation or use of MG s products 3 Electricity or fuel or any increases or unrealized savings in same for any reason whatsoever cept for the limited labour allowance coverage set forth above MG is not responsible for The costs of fluids refrigerant or system components supplied by others or associated labour to repair or replace the same which is incurred as a result of a defective part covered by MG s Limited Residential Warranty 2 The costs of labour refrigerant materials or service incurred in diagnosis and removal of the defective part or in obtaining and replacing the new or repa
93. r tested OK in previous Replace control board step Correct wiring Faulty wiring ISSUE 02 08 OCT 2010 If previous step tested OK 24VAC is present across ground of the plenum heart and 1 of the heat pump terminal strip but not across ground of the plenum heater and 1 of the plenum heater Page 31 Correct wiring 000821MAN 01 PLENUM HEATER TROUBLE SHOOTING Possible Cause Verification Recommended Action No 24VAC signal Faulty Plenum Heater 24VAC is present across pin 1 and Replace relay from 1 to ground Relay in heat pump pin 3 of the relay 24VAC is present at the plenum from heat pump terminal strip to heater control plenum heater ground but not from connector heat pump terminal strip 1 to plenum heater ground Thermal overload Fan not operating See Fan Not Operating section Correct problem Reset thermal overload Faulty overload Reset thermal overload Replace if faulty DOMESTIC HOT WATER DHW TROUBLE SHOOTING i Fault_ Possible Cause __ Verification Recommended Action Insufficient hot Thermostat on hot water Visually inspect the setting Readjust the setting to 120 F water tank set too low Should 140 F if required by local code Tank Problem be set at 120 F 140 F if required by local code Breaker tripped or fuse Check both line and load sides of Replace blown fuse or reset blown in electrical supply fuses If switch is open determine breaker t
94. re 15 15 psig or as high as 125 psi The controlling mechanism consists of flexible Digital Thermometer Amprobe orifice that varies its area inversely with In line Flowmeter pressure so that a constant flow is maintained 000821MAN 01 Page 32 ISSUE 02 08 OCT 2010 REPAIR PROCEDURES PUMP DOWN PROCEDURE Connect the refrigerant recovery unit to the heat pump service ports via a refrigeration charging manifold and to a recovery tank as per the instructions in the recovery unit manual If there was a compressor burn out the refrigerant cannot be reused and must be disposed of according to local codes All water coil heat exchangers must either have full flow or be completely drained of fluid before recovery begins Failure to do so can freeze and rupture the heat exchanger voiding its warranty Note that this does not apply to double wall domestic hot water exchangers desuperheater coils Ensure all hose connections are properly purged of air Start the refrigerant recovery as per the instructions in the recovery unit manual Allow the recovery unit suction pressure to reach a vacuum Once achieved close the charging manifold valves Shut down purge and disconnect the recovery unit as per the instructions in its manual Ensure the recovery tank valve is closed before disconnecting the hose to it Connect a nitrogen tank to the charging manifold and add nitrogen to the heat pump until a positi
95. reaker or fuse size wire gauge and Plenum Heater size A Ga Low voltage connections are correct and securely fastened STARTUP DATA Voltage across L1 and L2 L1 and L3 L2 and L3 o Heating Mode Suction Pressure Discharge Pressure psig kPa 10 minutes Duct Return Duct Supply and Delta T n fOut F v Outdoor In Supply In Outdoor Out Supply Out and Delta T n Compressor L1 black wire current Domestic Hot Water functioning Suction Pressure Discharge Pressure psig Duct Return Indoor Out and Delta T fin lt Cooling Mode 10 minutes 5 o o D O 5 5 o 2 O o o lt 5 Q Outdoor In Supply In Outdoor Out Supply Out and Delta T Startup Personnel Witness Site Signature Signature A total of three copies are required one for the site one for the installer startup and one to be sent to Maritime Geothermal Ltd Thermostat setpoint and suction pressure at cycle end 000821MAN 01 Page 22 ISSUE 02 08 OCT 2010 General Maintenance GENERAL MAINTENANCE SCHEDULE Air Filter 6monhs Inspect for dirt Replace if necessary Inspect for pitted or burned points Replace if necessary Inspect for clogs Remove and clean if necessary Clean as per HEAT EXHCANGER FLUS
96. shooting guide Repair procedures and refer ence refrigeration circuit diagrams can be found at the end of the troubleshooting guide STEP 1 Verify that the display is present on the thermostat If it is not proceed to POWER SUPPLY TROUBLE SHOOTING otherwise proceed to STEP 2 STEP 2 Remove the door and electrical box cover and check to see if there is a fault code on the control board If there is record the fault code Turn the power off wait 10 seconds and turn the power back on Set the thermostat to call for heating or cooling depending on the season STEP 3 24VAC signal does not appear across Y1 and C of the terminal strip within 6 minutes proceed to the THERMOSTAT TROUBLESHOOTING section otherwise proceed to STEP 4 STEP 4 fault code appears once a signal is present at Y1 and the compressor does not attempt to start proceed to the FAULT CODE TROUBLESHOOTING section otherwise proceed to STEP 5 STEP 5 If no fault codes appear and the compressor does not attempt to start attempts to start but cannot starts hard or starts but does not sound normal proceed to the COMPRESSOR TROUBLESHOOTING section otherwise proceed to STEP 6 STEP 6 If the compressor starts and sounds normal this means the compressor is OK and the problem lies elsewhere Proceed to the OPERATION TROUBLESHOOTING section NOTE To speed up the troubleshooting process the Test Jumper on the safety board can be placed to the YES position to change
97. tal loop pressure drop including the headers inside piping and heat exchanger drop should be calculated based on the antifreeze mixture and lowest desired entering water temperature The pump module selected must provide the required flow at this calculated pressure drop value CIRCULATOR PUMP MODULE 3 WAY VALVE POSITONS LEFT SIDE VIEW 2 Valve in HP fill purge position 3 Valve in normal running position 1 Valve in Loop fill purge position Ground Loop Ground Loo Ground Loop P rge Cart Purge Cart Purge Cart Heat Pump Heat Pump 170 Plantation Rd Chris Goddess PTT DEC 08 MARITIME GEOTHERMAL mm Chris Geddes 25 DEC 08 N rawing Geo Flo Circulator Pump Module po chris Geddes De 08 Installation Brass fees GEDDES GEDDES ne 000821MAN 01 Heat Pump 09 DEC 08 DATE ISSUE 02 08 OCT 2010 Page 19 Startup Procedure The following steps describe how to perform the startup procedure of the geothermal heat pump RH Series Two Stage R410a Startup Record located in this manual is used in conjunction with this startup procedure to pro vide a detailed record of the installation A completed copy should be left on site a copy kept on file by the installer and a copy should be sent to Maritime Geothermal Ltd Check the boxes or fill in the data as each step is completed For data
98. the compressor Replace the compressor If any terminal to ground is not infinite replace the compressor Seized compressor due to locked or damaged mechanism Start capacitor faulty Single phase only Compressor attempts to start but trips its internal overload after a few seconds Run capacitor already verified Check with capacitance meter Check for black residue around blowout hole on top of capacitor Attempt to rock compressor free If normal operation cannot be established replace compressor Replace if faulty Remove black residue in electrical box if any Potential Relay faulty Single phase only Compressor is tight due to damaged mechanism Faulty Stage 2 module Replace with new one and verify compressor starts properly Compressor attempts to start but trips its internal overload after a few seconds Run capacitor has been verified already Verify if 24VAC is present across Y2 and C of the terminal strip Page 26 Replace if faulty Attempt to rock compressor free If normal operation cannot be es tablished replace compressor Replace module if signal is pre sent Check wiring if signal is not present ISSUE 02 08 OCT 2010 OPERATION TROUBLESHOOTING HEATING MODE Faut Possible Cause Verification Recommended Action High Discharge Flow See Fan Troubleshooting section Correct the problem Pressure TXV adjusted too far Verify superh
99. the extent specifically set forth in the current labour allowance schedule A provided by MG s Warranty Department and only as follows 1 MG Units for two 2 years from the Warranty Inception Date 2 Thermostats auxiliary electric heaters and geothermal pump modules built or sold by MG when installed with MG Units for two 2 years from the Warranty Inception Date 3 Sealed refrigerant circuit components of MG Units which components only include the compressor refrigerant to air water heat exchangers reversing valve body and refrigerant metering device for five 5 years from the Warranty Inception Date Labour costs are not covered by this Limited Express Residential Warranty to the extent they exceed the amount allowed under said allowance schedule they are not specifically provided for in said allowance schedule they are not the result of work performed by MG authorized service personnel they are incurred in connection with a part not covered by this Limited Express Residential Warranty or they are incurred more than the time periods set forth in this paragraph after the Warranty Inception Date This warranty does not cover and does not apply to 1 Air filters fuses refrigerant fluids oil Products relocated after initial installation Any portion or component of any system that is not supplied by MG regardless of the cause of the failure of such portion or component Products on which the unit identification tags o
100. tup after 6 minutes Faulty thermostat to heat pump wiring Faulty thermostat Thermostat does not indicate a call for heat No 24VAC signal present across C and Stage 1 of the thermo stat 24VAC signal present across Stage 1 and C of the thermostat but not present across Y1 and C of the ter minal strip No 24VAC between Stage 1 and C of the thermostat when a call is indi cated on the thermostat FAULT CODE TROUBLESHOOTING Fault Possible Cause Verification _ Recommended Action Fault Code 1 High Pressure Control Faulty High Pressure Con trol open Must be a signal present on Y1 for this test HP pressures must be at static levels Faulty control board Fault Code 2 Low Pressure Control Faulty Low pressure con trol open Must be a signal present on Y1 for this test HP pressures must be at static levels Faulty control board Unit out of refrigerant Fault Code 3 Flow Switch Flow switch jumper re moved or faulty Verify if there is 24VAC across 1 on the control board and C of the ter minal strip as well as HP2 and C 24VAC is present across HP1 and C1 and HP2 and C but no voltage is present across CC on the control board and C Verify if there is 24VAC across LP1 on the control board and C of the ter minal strip as well as LP2 and C 24VAC is present across LP1 and C and LP2 and C but no voltage is present across CC on the control board and
101. ues can be found in APPENDIX B TABLE 2 Airflow Selections estin _ MED Nominal HIGH 6 Units are shipped with the MED position selected for nomi nal air flow The air flow can be further reduced by 15 by making a dry contact across and the terminal strip This can be used for applications that have multiple zones or retrofits with undersized ductwork to help reduce air flow noise in the ductwork It is recommended that airflow reduction only be used with the High or Max air flow setting Care should be taken to ensure that the unit does not trip a safety control in heating or cooling mode if the 15 reduction is used in conjunc tion with the MED or LOW air flow setting FAN RETURN ORIENTATION The RH Series heat pump can be ordered as a left or right hand return from the factory This must be specified at time of order as the physical construction of the two configurations 15 different Refer to the specification documents for more details FAN OUTLET ORIENTATION The RH Series heat pumps have a field configurable fan It s default location from the factory is in the end of the unit pro viding a ninety in the airflow It can easily be placed in the side of the unit for straight through airflow To switch the location of the fan outlet follow these simple steps 1 Turn the power of to the unit 2 Remove the screw that holds the side access panel in place and remove the access
102. ump Similarly a 1 line should be run from the Outdoor OUT Supply Out pipe to the method of disposal P T plugs should be installed at each port See Diagram A in the Ground Loop section for a description of P T plugs The water valve should be installed in the discharge line Refer to drawing 000907CDG at the end of this section for the recommended setup Placing the water valve in the dis charge line ensures that the heat exchanger inside the heat pump remains full of water when the unit is not running Unions or some other form of disconnect should be used so that the coaxial heat exchanger may be accessed should it required cleaning The heat pump has an electrical connector for the water valve just inside the case After the water valve is installed run the valve harness into the case through the hole provided Remove the jumper plug from the Valve Connector and connect the har ness in its place Ideally there will be water flow available in excess of the requirement of the heat pump In such a situation the proper pump can be selected to maintain a pressure of 30 to 40 psig on the lines when the heat pump is operating However in some cases a well can supply a heat pump only if the minimum requirement for water is used 000821MAN 01 Page 14 Water flow to the heat pump can be controlled very accurately by the installation of a reverse action refrigeration pressure valve in the discharge line of the unit Another more c
103. ump electrical box 3 1 2 Basement Refer to the heat pump labels pump Wall for connection locations module HEAT PUMP P T PI CONNECTIONS 999 OUTDOOR IN Or lt 1 1 4 3408 SUPPLY IN 1 Flexible Rubber Hoses copper or other suitable gt OUTDOOR OUT 0 _ piping 100 psig min SUPPLY OUT Available Fittings 3144 1 Sweat optional P T Fill gap between 2913 1 Barbed insulation and wall 1 FPT Suitable 1 MPT 3072 1 with expanding foam Brass Fittings Adapter NOTES Circulator Pump Module should be mounted vertically to minimize the possibility of air locking the circulators All lines inside the structure and through the wall should be insualted with 3 8 to 1 2 thick closed cell pipe insulation Holes through the foundation structure should be filled with expanding foam from both sides to prevent leakage Proper drainage material should be used on the outside of the wall to prevent water buildup Pump module fittings are available from Maritime Geothermal Ltd Geo Flo Part Numbers are indicated above italics e A pressure gauge is recommended if P T plugs are not installed The air bladder tank should be pressurized to the desired static pressure of the ground loop before installation For most applications a 1 pump module will accomodate NORDIC models sizes 25 and 45 and 2 pump module will accomodate sizes 55 65 and 75 The to
104. ve pres sure of 5 10PSIG is reached This prevents air from being sucked into the unit by the vacuum when the hoses are disconnected The heat pump is now ready for repairs Always ensure nitrogen is flowing through the system during any soldering procedures to prevent soot buildup inside the pipes Maritime Geothermal Ltd recommends re placing the liquid line filter drier anytime the refrigeration system has been exposed to the atmosphere VACUUM AND CHARGING PROCEDURE STEP 1 After completion of repairs and nitrogen pressure testing the refrigeration circuit is ready for vacuuming STEP 2 Release the refrigerant circuit pressure and connect the vacuum pump to the charging manifold Start the vacuum pump and open the charging manifold valves Vacuum until the vacuum gauge remains at less than 500 microns for at least 1 minute with the vacuum pump valve closed STEP 3 Close the charging manifold valves then shut off and disconnect the vacuum pump Place a refrigerant tank with the proper refrigerant on a scale and connect it to the charging manifold Purge the hose to the tank STEP 4 Weigh in the appropriate amount of refrigerant through the low pressure suction service port Refer to the label on the unit or TABLE 12 Refrigerant Charge Chart for the proper charge amount STEP 5 If the unit will not accept the entire charge the remainder can be added through the low pressure service port after the unit has been restarted REPLACMENT PRO
105. will provide proper airflow up to 0 5 inH2o for 1 2HP motors 0 7 2 for 1HP motors The ductwork is poorly designed or greatly undersized if the fan motor cannot provide the required airflow Select a higher setting Air flow reduction 15 en abled Fan Control Signal Har ness is loose AR1 and AR2 are connected with a dry contact Verify that the connector is properly inserted into the fan motor Gently tug on each wire to verify it is prop erly inserted into the connector Air flow reduction may not be fea sible with poor ductwork and or lower Air Flow selections In crease settings until unit operates properly Repair any loose connections Faulty Control Signal Har ness or faulty motor head Fan Control Signal Har ness and or Fan Power Harness 15 loose Faulty Control Signal Har ness or Faulty motor head Measure 24VAC between White pin 3 and the following at the fan con trol signal harness insert probes in connector where wire is inserted do not unplug the connector Circulation Grey pin 15 Stage 1 Yellow pin 6 Stage 2 Yellow Black 14 Stage 3 Violet pin 2 Verify that the connector is properly inserted into the fan motor Gently tug on each wire to verify it is prop erly inserted into the connector Measure 24VAC between White pin 3 and the following at the fan con trol signal harness insert probes in connector where wire is inserte
106. ze 25 to 45 DHW IN 1 2 FPT DHW OUT 1 2 FPT THERMOSTAT WIRE CONN SUPPLY IN 1 FPT 22 1 4 DOOR ACCESS ELECTRICAL BOX COMPRESSOR CIRC PUMP CONNECTION ELECTRICAL O SERVICE 2 PRESSURE SERVICE PORT ONDENSATE DRAIN LOW PRESSURE SERVICE PORT 3 4 NOM PVC INS NOT INTERNALLY TRAPPED Front View 3 21 10 7 8 41 8 2 1 4 11 3 4 BLOWER POSITION IS FIELD CHANGEABLE 7 1 4 SIDE OR END REVERSIBLE REMOVABLE FILTER 1 1 8 RACK FOR 30 x 20 x 2 AIR FILTER ALLOWING THUMB SCREW FILTER CHANGE Back View 000821MAN 01 Page 50 ISSUE 02 08 OCT 2010 CASE DETAILS Right Hand Return Size 25 to 45 continued 2 o oo BLOWER POSITION IS FIELD CHANGEABLE SIDE OR END 77 8 DOOR ACCESS TXV FILTER DRYER SIGHT GLASS DHW PUMP 2 5 5 I ___ gt Bottom View ISSUE 02 08 OCT 2010 Page 51 000821MAN 01 CASE DETAILS Left Hand Return Size 55 to 75 DHW OUT 1 2 FPT 7 8 DHW IN 1 2 11 8 B 9 SUPPLY OUT m 1 FPT THERMOSTAT WIRE CONN DOOR ACCESS ELECTRICAL BOX COMPRESSOR CIRC PUMP 1 1 2 CONNECTION ELECTRICAL SUPPLY IN LOW PRESSURE SERVICE PORT ONDENSATE DRAIN 3 4 PVC INS HIGH PRESSURE SERVICE PORT NOT INTERNALLY TRAPPED Front View 3 1 4 7 8 BLOWER POSITION IS

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