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1. R pes Electric Heat relay coil l Stage 1 Stage 2 SOP S amp S E 3 4 ud ui STE o Lock out relay ium 21 45 y 2 CN O omp relay coil High Pres Low Pres Taco Valve DOOD Floor Circ relay coil Page 31 13 Feb 00 Maritime Geothermal Ltd NORDIC EMW HW Series Electrical Box 230v 1 60 Box Heating amp Domestic Hot Water Versions d 9 OO Field ome eL DO T stat CD CD e A A DO T hermostat Wirin w E DO R ho 24v AC Lock Main Floor QO C ommon l Bun dd Pump OO Connect R amp T to bring on Ranco Demos Relay DO floor circulator emperature Control DO DO DO DO e 230 24v Trans Domestic Hot water Circulator Pump Special Instructions Note If heat pump is to be operated without the hot water circulator connected to the water tank and flooded Start cap Run cap _ _ with water remove the wire marked with RED tape located here This pump is water lubricated and must not be run dry Elec Heat Relay un un Potential Relay E EE p Ee em System Voltages 230v 1 60 Compressor 120v 1 60 Circulators
2. o reg NN Nordic Qw Well Heat Pump pue e A dl Pitless i LI ii Adaptor Water Table eo ee ces een 60 to 100 fe gt Submersible lt Pump Two Well System gt 4 gt Supply Well Pressure Tank Heat Pump ds Log e NEL gt QR Pitless Water Table 1 ile reld gt E 60 to 100 fh gt Submersible Pump Tile Bed or Leaching Field Page 4 Maritime Geothermal Ltd Unpacking When the heat pump reaches it s 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 j Ai In to Heat Pump a suitable claim filed at once t FA The heat pump is well con structed and every effort has been made to insure that 1t will arrive intact how ever it 1s in the customer s best interest to examine the unit thoroughly when it arrives B gt a Placement The location of liquid to water heat pump inside the home should be determined by 1 The ease at which piping runs can be connected to the in floor heating headers on the output side o
3. ZONE 1 ZONE 4 ZONE 2 ZONE 3 Page 8 Maritime Geothermal Ltd 13 Feb 00 EMW Hot Water tank Plumbing Alternate Cold Supply IN Hot Water out Remove drain i in tank and Check install T Valve 4 i 120 F_ as shown i below I I I Y A sa Hot OUT Bladder Tank Optional 50 Micron Y Strainer 99 Supply IN T 0 6 8 i Piping Legend 1 Hot Floor OUT 2 Floor IN 3 Domestic Hot IN 4 Domestic Hot OUT 5 Loop or well IN 6 Loop or well OUT Supply Out Optional Dole flow restrictor The drawing above describes how to plumb a single domestic hot water tank to an Energy Module However this technique will only allow the hot water to reach the same temperature setting as the EM internal tank LOCK OUT RELAY which prevents the unit from restart ing until the electrical supply to the unit is broken by opening the heat pump breaker and then closing it again If one of these controls trips there is a serious problem with the system and it must be rectified if the unit is to maintain good service NOTE Under no circumstances should the heat pump lock out relay be reset more than twice in an hour If the heat pump is shutting off because of LOW or NO water flow on the cold side then repeated resetting of the unit could cause the heat exchanger to freeze and rupt
4. Maritime Installation Geothermal Ltd Manual NORDIC models EMW 45 55 65 Liquid to Water EMW Heat Pumps Designed for Radiant Floor Heating Table of Contents Water Well Requirements Groundloop design Optimum Placement Circulator pumps Plumbing the Heat Pump Loop Flushing amp antifreeze Safety Controls Engineering Data Starting the Heat Pump General Specifications Maintenance EMW Series features TTT t1 Water Well or Groundloop Operation Maritime Geothermal Ltd P O Box 413 Email nordic auracom com Petitcodiac N B E0A 2H0 www discribe ca nordic 13 Feb 00 Maritime Geothermal Ltd Water Well Energy Module Heat Pump System Energy Input Solar Geothermal Water Pump System NORDIC Energy Module Heat Pump Fan Coils Infloor Heat Heat Distribution Disposal of thermally altered water Pond Lake Return Well Page 2 Maritime Geothermal Ltd 13 Feb 00 NORDIC EM Water Well System Prerequisites The source of energy groundwater The Heat Pump A heat pump with Btu output capable of heating the home in all winter weather conditions should be selected us ing a rule of thumb as follows The method of supplying energy to the heat pump Converting the energy to a useable form Distributing the heat Returning the exhaust water to the earth for reheating Water Well Requirements 1 A DRILLED well of 5 diamete
5. 15 13 Feb 00 Maritime Geothermal Ltd Loop Pump Module Piping 1 o 2 0 EM Heat 3 0 Pump 4 1 Fill amp Purge access ports Basement Mounting Clamps Wall C 7 Transition Adaptor 3408 to male thread 4 4 a 5 web Ji o ETT BS 05 Flexible Rubber Hoses or other suitable piping 100 psig min Pipe Connections Floor Hot Out Floor Hot IN Hot Domestic IN Hot Domestic OUT eupply water IN Supply water OUT oo0RoN gt S i B LIN T al Y 177 Etpe 7 n 1 1 4 PE 3408 Taco 011 3 way 1 1 2 PVC Pool Circulators Backflush Valves Pump amp Purge Center LS Loop 1 Valve in Loop fill purge position wel 2 Valve in HP fill purge position 3 Valve in normal running position Page 16 Maritime Geothermal Ltd NOTE If you use pressure gauges permanently installed on the system as in the case of a demonstration situation etc be careful not to exceed the maximum pressure rating of the gauges to avoid damage to their mechanism When satisfied all connections are leak free release the air pressure an
6. Intermittent contact in electrical control circuit Compressor over loaded Low or no evaporator water flow Evaporator water supply too cold Faulty low pressure ctrl Low refrigerant charge Low or no water in tank Aquastat set too high TXV stuck closed Filter drier plugged Thermostat not calling for heat High or low pressure limit open Lock out relay energized Normal operation except too frequent starting and stopping Check for continuity through internal overload in compressor Manually open water valve 1f equipped and measure water flow with a flowmeter Measure temperature of water Check flow rate with spec sheet to determine if proper gpm is available Refrigerant pressure control should open on drop at approx 45 psig for well opera tion and 35 psig For closed loop applica tion Check water temp and flow Clean heat exchanger If suction is still low check suction gas pres Normal suction is 50 60 psig 55 typical on R 22 or R 407C on a well Pressure should be 40 45 on a loop during heavy use Make sure tank 1s full of water Aquastat should be below 120 F Check for refrigerant flow through TXV and filter Page 27 13 Feb 00 Locate open control and determine cause Replace faulty control if necessary Check for loose wiring Check differential setting on aquastat Widen setting to allow longer run cycles Observe suction amp discharge pressures
7. make sure amp draw is within range Check well pump or circ pump for proper operation Check water valve for proper operation Increase flow to proper gpm for tempera ture of water used The low control should reset automatically when refrigerant pressure reaches 65 to 70 psig Heat pump can then be restarted by resetting the lock out relay Turn power off then back on Replace faulty control if it will not reset Add refrigerant slowly until sight glass clears Install fluorescent dye and check for possible leaks with ultra violet light halide sniffer etc Open purge valve on top of tank to make sure it is full of water Observe and adjust aquastat setting Replace filter or LXV if required 13 Feb 00 Maritime Geothermal Ltd COOLING Low or no water level in Check fluid flow strainers pumps Restore proper level in cold MODE evaporator tank and valves in the system Temp ctrl buffer tank Purge air through re OPTIONAL Note The function of the two will open in about 1 minute if water lief valve Low temperature heat exchangers are reversed _ level is low or if unit is run with suc Reset lock out relay sensor opens when in cooling mode Evap tion pressure below 50 psig Replace low suction temp ther Becomes cond cond Be mostat comes evaporator Aquastat on cold buffer tank Verify accuracy of aquastat with reli Replace or readjust aquastat for set too low Should be 43 45
8. able hand held thermometer proper operation F High Pressure limit Low water flow on condenser Check flow of well water or loop wa Restore flow and reset lock out opens side ter relay Check for air or strainer restrictions Water valves open TXV possibly not opening Warm bulb with hand and observe Replace TXV or filter drier id Liquid line possibly plugged suction pressure while operating non operational or plugged DOMESTIC Circulator pump not operating Use an amprobe to measure current Replace if faulty HOT WATER draw PREHEAT TANK Insufficient hot wa ter Blockage or restriction in the Check water flow and power to Remove obstruction in water water line or hot water heat pump Check water lines for obstruc lines Acid treat the domestic hot exchanger tion water coil The Dole flow control is a simple self cleaning device designed to deliver a con stant volume of water from any outlet whether the pressure is 15 psig or as high as 125 psi The controlling mechanism consists of a flexible orifice that varies it s area inversely with pressure so that a con stant flow is maintained In line Flowmeter Page 28 Maritime Geothermal Ltd 13 Feb 00 Ranco ETC Thermostat Controls The Ranco ETC is a microproc essor based electronic temperature control designed to handle the OFF ON functions of the NOR DIC EMW unit The ETC is equipped with an LCD display
9. culate the size of pumps required use the pressure drop tables for the diameter and type of tubing used along with all el bows T s etc and the pressure drop through the unit s heat exchanger to arrive at total ft of head x 3 gpm ton x No of tons Heat Pump to Circulator Piping The heat pump must be connected to the circulator pump module with a lineset suitable for the flow required with mini mum pressure drop Common line sizes would be 3 4 rubber or plastic for heat pumps from 1 to 2 5 ton while for unit sizes 3 through 5 ton 1 lines should be used The installation of P T plugs pressure temperature pronounced Pete s plugs should be installed on both the entering and leaving lines at the heat pump The P T plug will allow the installer or home owner to check water flow through the loop by measuring the pressure difference through the heat exchanger and comparing this pressure drop to that of the appropriate model in the engi neering section see Pressure Drop vs Water Flow Table Rubber Hose 3 9 Polyethylene Heat Exchanger Flush Cart Tank Flushing amp Purging the Earthloop Once the earthloop has been installed and all connec tions are completed to the heat pump and pumping station the entire plumbing 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
10. pressures accurately 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 P T Plugs x EN Protective Cover Included 1 i h Fittings and accessories available for P T plug application to heat pump 5 13 Feb 00 Maritime Geothermal Ltd NORDIC EMW Closed Loop Connections Check Valve 4 i From Loops g gt Hot Out to H DEUS fin To Loops Domestic Hot P Pump Module A Water Pre hleat Domestic Lans D Wafer 119 Piping Legend Finish 1 Hot Floor OUT Tank ya 2 Floor IN i Yee E padi 3 Domestic Hot IN 140 F Cold TP a 4 Domestic Hot OUT I IN 5 Loop or well IN Shown 6 Loop or well OUT a 1 23 4 zone valves or telestats ZONE 1 ZONE 4 ZONE 2 ZONE 3 Page 6 Maritime Geothermal Ltd minimum requirement for water is used Supply water flow to the heat pump can be con trolled very accurately by the installation of a reverse action pressure valve in the supply water discharge line of the unit
11. which provides a constant readout of the sensed temperature and a touch keypad that allows the user to easily and accurately select the setpoint temperatures and differen tials for the first and second stages of operation Programming Steps and Display STAGE 1 Step 1 To start programming press the SET key once to access the Fahrenheit Celsius mode The display will show the current status either F for degrees Fahren heit or C for degrees Celsius Then press either the UP arrow or DOWN arrow key to toggle be tween the F or C designation For closer regulation of your wa ter temperatures we recommend you program in the Fahrenheit mode Step 2 Press the SET key again to access the stagel setpoint The LCD will display the current set point and the 1 annunciator will be blinking on and off to indicate that the control is in the setpoint mode Then press either the UP arrow key to increase or the DOWN arrow key to decrease the setpoint to the desired tempera ture Step 3 Press the SET key again to access the stagel differential The LCD will display the current differential and the Dif 1 annun ciator will be blinking on and off to indicate that the control 1s in the differential mode Then press ei ther C1 for cooling or H1 for heating Then press the UP or DOWN key to toggle between the C1 or H1 designation STAGE 2 Step 5 Press the SET key again to access the stage 2 setpoint The LCD
12. 9 48 081 19 3 4084 3 A Gal 201 63 2 9 dI ME dh ELLs LA 2 46 638 19 4088 a Oa ZoZz 54 io Vd 9n TIO 12 9 46 032 19 0 4034 3 Ou a5 oe pak A WO E 7 45 434 19 0 3982 3 DID Xy 9 44 071 19 7 43 498 18 8 42 932 18 42 749 18 42 193 18 41 644 18 41 466 18 40 927 18 40 395 18 40 222 18 39 699 18 39 183 18 39 015 18 38 508 17 38 008 17 Tested in accordance with ARI 325 amp ARI 330 standards amp CAN CSA C446 M94 Page 24 Maritime Geothermal Ltd 13 Feb 00 Performance Specification Sheets Model EMW 65 source jPres Sink Btu s Comp Comp csa Suct Disch CE EIA RATAS 03 9 O52 09 007 00 114 12 10 878 000 24 4 5860 Olav 315 DI X140 044 077 24 5 114 12 1027 76 986 24 2 5783 3 i 66 1 312 Az OO LOs 6p20 23 ll4 12 10 575 985 24 0 5409 3 i Soo US 63 det 6 7 54 60 4 114 12 10 2 73 706 24 Y MINO Oe SLL 54 024 Owl S409 Da LLLA 12 1011 72 T74T 23 9 90395 2 Pa 64 1 308 45 od se Dopo Ai 114s Le i10 0 71 802 23 7 0900 De 634 0 209 Bow i so OL Oo Bs Lis 12 9 69 648 23 SOUL OS 307 54 Odd EX XE 6 68 742 23 6 5498 3 or 62 2 304 45 sa Eu ie Li AZ 3 67 849 23 4 5426 3 i 61 4 301 One nodos de Ib E 256528013252 5451 OO eA Ss 54 Tied o Slo ee T MM 64 958 25 1 S360 32 SiS o 990 45 o O Ne ZZ SO Ok iS s leo oe DOR OI 63 1 46 24 4 Liss LZ 1 62 190 23 0290 pian wis 54 QU Ay OF 3 Lux
13. Es SS mM NENNEN a re 13 Feb 00 Page 19 13 Feb 00 Maritime Geothermal Ltd Maritime Geothermal Ltd Color Caissie Grey EMW Series Heat Pumps Models EMW 45 65 Style Vertical Date Sunday February Drawn By G Kaye NOTE Electrical supply enters from right side through Ca Z oe knockouts as shown 2 41 poo K A AN AN 9 V e Door Door I p Door N Floor OUT 1 4 V e 5 Thermostat N Floor IN q Knockout ENEN OO IO NND IO IO O O O O E a N a 5 23 i V j 3 50 A i O Domestic IN gt a 4 7 Y p E A O Domestic OUT e 88 knockout E e or 48 e 1 09 Knockout Tank Location Q E a V a Height 38 Refrigerant Diameter 20 Supply IN Access 9 4 Valves VIO i A Comp Location a L 22 1 L y V V T PY Pg P OER yy gg y FRONT VIEW RIGHT SIDE VIEW 41 kK 26 gt A Door Door Door Fa V BACK VIEW RIGHT SIDE VIEW Page 20 Maritime Geothermal Ltd 13 Feb 00 Maritime Geothermal Ltd Color Caissie Grey Energy Module Heat Pumps Models EMW 45 65 Style Vertical Date Sunday February Drawn By G K
14. If the unit is a heating cooling unit then a dual high pres sure low pressure valve or a pair of valves must be installed Another 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 If either of such valves is needed they can be supplied and in stalled by your dealer All water line valves on both the supply and dis charge lines should be either BALL or GATE valves since a GLOBE valve will create too much restriction across the line possibly causing the heat pump to trip out on it s low pressure safety cutout control as a result of insufficient water flow Exposed water lines will have a tendency to sweat when the heat pump is in operation therefore it is recom mended that both the water supply and discharge lines be in sulated with suitable insulation Hot Water Connections Connection to the hot water generator feature of the heat pump is accomplished by teeing into an electric or oil fired hot water tank with a capacity of 40 gal minimum A typical piping diagram is shown on page 6 in this manual Be sure to note the position of the check valve and the direction of water flow One should be sure the tank is filled with water and is under pressure before activating the heat pump Slightly loosen the copper union on the hot water discharge pipe to allow
15. Le O 61 381 2240 5220 S EN Stee 290 45 oo 425 04 2 LIe dd 4 9 60 585 22 9 5159 3 A 970 E Ns 9 43 69 4 ELLAS d2 8 58 766 22 5162 A 50 0 290 54 sa BO 13 35 Page LE 49 58 002 22 5 5026 3 2s Dox 292 45 st RADO 2s hac DE ot DT 248 22 0 ULT De i daa 290 OS so WIES Xd IX 12 sO 59 530 22 5034 Dus d Ep 54 SU XU TS a Lax DE so 54 609 22 2 49683 34 54 4 289 45 QA AU LLL LAS be 0 54 096 22 2 4904 3 Joel Od 2 52 473 22 9 51 791 21 51 118 21 50 899 21 50 237 21 49 584 21 49 372 21 48 730 21 48 097 21 47 891 21 47 268 21 46 654 21 46 454 21 45 850 20 45 254 20 Tested in accordance with ARI 325 amp ARI 330 standards amp CAN CSA C446 M94 Page 25 13 Feb 00 Maritime Geothermal Ltd NORDIC EMW Series Trouble Shooting Guide COMPRESSOR Power Failure Compressor not operat ing Disconnect switch open Fuse blown Low voltage Burned out motor Thermal overload on com pressor tripped Faulty compressor contac tor Seized compressor due to locked or damaged mecha nism Electric circuit test shows no volt age on the line side of compressor contactor Voltmeter shows no voltage on the line side of the compressor contac tor At heat pump disconnect box volt meter shows voltage on the line side but not on the load side Voltmeter shows abnormally low voltage Below 210 v at heat pump disconnec
16. RARE NX OOOO ORRIN X000 000002 x Qe ey Horizontal Slim Liquid to Air Split Systems NORDIC Environmentally sound solutions to today s Heating and Cooling needs
17. air to escape from the system before the unit is started This step will make certain that the water circulator is flooded with water when it is started Since the pump is water lubricated damage will occur to the pump if it is run dry for even a short period The union on the discharge water line may have to be purged of air several times before good circulation is obtained A hand placed several feet down the line will sense when the water is flowing The thermostats on the domestic hot water tank should be set to 100 F since the heat pump has an internal thermo stat set at a high of 115 F By setting the tank thermostats as described the heat pump will try to keep the tank above the cut in point of the electric element settings thus generating hot water from the heat pump only During periods of high demand the electric elements may energize to help make hot water NOTE If 2 shut off valves are located on the hot water lines be sure that the valves are open when the heat pump is operating If both valves are closed when the heat pump is operating water will expand in the hot water heat ex changer and could cause damage to the hot water circulator pump Page 13 Feb 00 Water Disposal Methods Water disposal methods vary from area to area how ever some consideration should be made to prevent the cooled discharge water from immediately coming in contact with the supply source Generally speaking returning water to
18. exchanger may be as low as 20 F cooler See the antifreeze concentration chart at left for details of freeze protection afforded under different concentrations NOTE Add enough antifreeze to allow for a tem perature 20 F lower than the expected lowest loop fluid temperature entering the heat pump NOTE Although many different antifreeze solutions have been employed in geothermal systems the alcohols such as methanol or ethanol have the most desirable characteristics for earthloop application The overall heat transfer character istics of these fluids remain high although care must be taken when handling pure alcohols since they are extremely flam mable Once mixed in a typical 25 by volume ratio with wa ter the solution is not flammable In 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 sub stituted Propylene glycol should only be used in cases where alcohols are not permitted since the heat transfer characteris Page 17 13 Feb 00 tics are less desirable and it becomes more viscous at low temperatures which increases pumping watts 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 2 the for approximate volume per 100 ft When the volume of the loop has been calculated and the appropriate amount of antifreeze is rea
19. require 125 to 175 ft of borehole per ton of heat pump for successful heat transfer to take place with the earth Boreholes should be spaced a minimum of 10 ft apart while if land is available 15 ft spacing will produce better results Boreholes should be tremie grouted from bottom to top with bentonite or a mixture of bentonite and neat cement for proper con duction with the earth Design 4 Shown here is a typical series loop design using 1 1 4 to 1 1 2 pipe for the loops Some designs incorporate a double U tube assembly down the well which allows for better heat transfer between the earth and the loop NOTE Many other loop designs are in common use throughout North America For a more comprehensive manual on earthloop design refer to our Earthloop Design Manual or contact IGSHPA International Ground Source Heat Pump Association and request their earth systems dealer training manual Page 12 Maritime Geothermal Ltd 13 Feb 00 EMW Series Closed Loop Installation Information Introduction Many commercial buildings select a vertical or horizon tal closed loop as the earth heat exchanger either because of a lack of available groundwater or for the reduced maintenance costs which can be obtained when compared to open loop sys tems Often the problems which occur in a geothermal sys tem are associated with the wells pumps or the direct result of utilizing poor quality water or water which is contaminated w
20. sys tem Prior to inserting down the hole the assembly must be filled with water so that buoyancy will be at a minimum when inserting the U tube Cap the ends so that mud and 29 F Methanol debris cannot enter the loops during insertion and grouting A piece of heavy rebar or galvanized pipe is attached to the bot tom 10 to 15 ft of the U tube with tape to add weight to the assembly and also prevent it from curling up and gouging into the side of the borehole during insertion The entire length of the assembly should be taped every 10 ft to create greater rigidity in the U tube assembly as it is installed in the bore hole The U tube is inserted into the borehole along with the tremie pipe and the borehole is tremie grouted from bottom to within 10 ft of the top with a mixture of neat cement and ben tonite or 100 bentonite When using bentonite refer to the manufacturers instructions for mixing and select a product that provides a total solids content of from 25 to 30 when mixed Horizontal trenches from 4 to 6 ft deep are dug along side the boreholes to the building so that a reverse return first pipe out on the supply line is the last pipe back on the return line header pipe arrangement can be constructed to tie all the loops together Lay out the header system so that air cannot be easily trapped in the header using a technique approved by IGSPHA or the local governing authority Use a shovel to break away a
21. will display the cur rent setpoint and the S2 annun ciator will be blinking on and off to indicate the control is in the setpoint mode Then press either the UP key to increase or the DOWN key to decrease the set point to the desired temperature Step 6 Press the SET key again to access the stage2 differential The LCD will display the cur rent differential and the DIF 2 annunciator will be blinking on and off to indicate that the con trol is in the differential mode Then press either the UP arrow key to increase or the DOWN arrow key to decrease the dif ferential to the desired setting Step 7 Press the SET key again to access the stage 2 cool ing or heating mode The LCD will display the current mode either C2 for cooling or H2 for heating Then press either the up or down key to toggle be tween the C2 and H2 designa tion Press the SET key once more and programming is com plete NOTE The ETC will automati cally end programming if no keys are depressed for a period of 30 seconds Any settings that have been input to the con trol will be accepted at that point All control settings are retained in non volatile memory if power to ETC is interrupted for any reason Re programming is not necessary after power outages or disconnects unless different control settings are required ther the UP arrow key to increase or the DOWN arrow key to decrease the differential to the desired setting Step 4 Pres
22. 230v 1 60 Hot Water Elements Electric Heat Compressor Circuit Breaker Circuit Breaker Neutral High Main AAA Red Voltage Terminal DIS Field Block D O L3 Black a Wiring Gnd O 0 Page 32 Maritime Geothermal Ltd 13 Feb 00 NORDIC EMW 45 55 65 HW Series Schematic 208v 3ph 60Hz l i 607 070 0g I I ot I I ost I i i I r I l T3 l Io I IN o IS lo 12 18 IS Ilo 5 10 pO FO Qc i A re I I l I T1 I I ost E 3 d de i I Comp Relay Fog Im O A L3 T3 CORPER HRS Heater Element T2 Heater Element 120v Domestic 11 Circ Pump Heater Element Domestic Circ Pump Electric Heat Relay Greyed Circled Items Optional 120v Floor pal Circ Pump Floor Pump Relay 208v Thermostat Wiring Control transformer 40 va Common C e 24v R Ww Electric Heat relay coil Floor stat T Domestic stat D 4 A dry contact closure Lock out relay between R and T activates the floor circulator pump f A A High Pres Low Pres A dry contact closure Comp relay coil between R and D activates the domestic hot water circulator L pump Domestic Circ relay coil Page 33 13 Feb 00 Mar
23. 2993 54 d 63 54 45 oer 54 das One Ed d ou 03a 9a dos Ns 94s ds OS 54 A n2 2 64 0 63 Soe 54 6 99 6 0 dl 7 pa POr e 39730 Sooo 3900 Sle Zk DO ke Shy d DD dol od 30 D3 7 90 Jdr 20 S270 Sip Oo Sad 9054092 Tao E NI LAI she DO MEA E 2s 28 324 27 984 27 648 26 819 26 497 26 179 25 394 25 089 24 788 DM aud 23 156 eyl 22 166 22 493 3 22 223 2 LLE IL AL Lab Ns I TRINI EA TIO L10 LOT LEOR TEOS Lu LIU LIO LIOU LLU LO 110 1095 LOD LA 12 La 12 12 TA 12 Is 12 IZ I 12 12 ta La LA l2 12 TA LA a0 S 54 562 53 908 52 290 51 663 51 043 49 512 48 917 48 330 46 881 46 318 45 762 44 389 43 857 43 330 42 030 41 526 41 028 39 797 39 319 38 848 37 682 37 230 36 783 36 552 36 113 35 680 35 455 35 030 34 609 34 391 33799 33 571 33 360 32 959 32 564 17 17 153 Lia L7 Tis 104 105 LS re ice LS L6 LG 16 10 LOs 10 16 104 ie 2 29 05 ILLA 3916 Sion i a 3824 3820 STJA 21203 3680 DIRE DUO PA 3588 3544 209023 3498 SAO O 3414 3411 03095 09295 TITS Dd 3 910 9 00 Jod d 798 Te Es e O 1733 Moo 644 625 Duo moo 520 3 478 436 419 OSLO Tested in accordance with ARI 325 amp ARI 330 standards 8 CAN CSA C
24. 446 M94 Page 23 Ju zs TOs 093 O9 68 OTa 67 00 SR 64 Creer 63 Os SN MP os 60 Ds iS A OO Dus 2094 291 2 13 Feb 00 Maritime Geothermal Ltd Performance Specification Sheets Model EMW 55 source PPres Sink Btu s Comp Comp csa Suct Disch rer ree um wr peer ue one ure uer re ier n oen nte or eor Jemen O3 64 2 52 56 9 05 Lio 412 9 1 65 510 21 0 dozl 65 0 SUS O4 DN Feil SOIL 3 LTS i12 0 64 658 20 8 4758 3 6Tul 302 Aosa OL 15 5 oy 79 wis ee da 9 63 816 20 6 4626 3 0642 200 00430 S267 O04 6 595 Le le pe 0 61 903 20 4700 60 0 S01 04 4 Dose QM 29 19 os LIZ dz so 61 099 20 5 4039 J Da OD 296 45 OZ ee a L5 x IE Le lt 4 60 304 20 3 4579 3 64 3 296 Os 59 43 80 4 Lide La 3 58 495 20 4583 Cas L97 54 O 5 c 25 55 Lice AZ sL 307 135 20 2 9523 233 63 1 294 45 s0 AZO 2 ie Us E 8 56 984 20 1 4464 3 62a 202 3 a sol oM TEXT EMEN RU O05 275 20 4410 US oS 54 AS 8 c UNT o i 26 547556 19 5 4552 09 ORE CO o NOS NIE 45 mom UPS dE DET ET 453 847 I9 3 4296 3 SINE KU oer sa dO LL X i ue Le Jo 52 231 19 4500 59 4 289 54 o gt 20 19D 3a Lile T2 A 51 552 19 5 4244 3S d OUO Zot 45 20 3932 LU ds Es be 2 50 882 19 5 4183 3 A 579 264 Os it 96 99 X LX DE 4 49 356 19 4193 57 6 286 54 f sd Oy a es tlile dz 2 48 714 19 3 4138 3 2042 200 45 oo dO UU As LED AZ
25. 8 PE 160 psig SDR 11 geothermal heat pump polyethelene tubing N QI O m Allow a minimum of 10 ft between each trench and preferably 15 20 ft if space is available 3 3 4 T s Header ON Detail 1 1 4 Header Pipe A Insulate all tubing within 12 of the structure with 3 4 closed cell armaflex insulation e Piping that is laid in a header trench should be insulated to a point where each loop branches to it s individual trench e Loop 4 shown above could be left uninsulated to pick up heat in the header trench as long as the header trench is more than 12 out from the building 60 ft e Manifolding can also be done outside the building using suitable fusion joining INFLOOR TUBING techniques 40 ft BUILDING Page 14 Maritime Geothermal Ltd Each ton of heat pump installed requires approximately 150 ft of borehole The 3 4 to 1 plastic pipe U tubes are fused together using socket fusion techniques and then pres sure tested for leaks at 100 psig using either water or air Pro vision should be made to allow enough extra pipe to extend from the boreholes to the proposed location of the header
26. a second well pond lake or stream is acceptable while re turning water to the same well will usually cool the water so much that the heat pump will shut off on it s low pres sure temperature safety control 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 be necessarily be pumped into the same aqui fer depending on underground conditions but the return well does have to be able to supply 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 watertight well cap on the well to keep the return water from flowing out the top of the well This cap is com monly required since a certain amount of pressure is needed to force the return water back down the well if the static level is high Return wells are not always the answer and to some it may be more satisfactory to pump the water to a pond or away into the woods Water recharged naturally through percolation into the soil is an alternative to a recharge well The water discharged will generally soak into the ground within a distance of 50 to 100 ft If care is taken to make sure the end of the pipe does not freeze then this method of disposal works well Safety Controls The NORDIC EMW series heat pump has two built in safety controls which
27. are designed to protect the unit from situations which could damage it A LOW REFRIGERANT PRESSURE heating mode The low refrigerant pressure control is designed to shut the unit down if the refrigerant evaporating pressure be comes too low thus risking the danger of freezing conditions in the evaporator There are only 4 reasons why this control would activate and they are 1 Low water flow See requirements for each model 2 Low water temperature Below 40 F 3 Dirty or fouled heat exchanger 4 Low refrigerant charge B HIGH PRESSURE CONTROL The second safety control is a high pressure safety limit which monitors compressor discharge pressure This device will not normally trip unless the water level is low in the in ternal storage tank Such a situation could occur if the tank was drained for service and not refilled or the aquastat setting was set above 120 F If one of these controls trips it will activate a 13 Feb 00 Maritime Geothermal Ltd NORDIC EMW Well Water Connections Piping Legend Hot Floor OUT Check Valve Floor IN 13 Domestic Hot IN Domestic Hot OUT Loop or well IN Hot Out to Home Ooh WD m 4 Domestic Loop or well OUT Hot A Water Pre lleat Dorhestic Jens Hot 115 Pih Pres Finish I P Pres Tank auge witc a 1408F I y 1 23 4 zone valves or telestats
28. aye Title Internal Component Layout Electrical Box Expansion Tank Domestic Circulator Taco B4 06 n Floor Circulator Tank Locat Taco 0011 B is Height 38 Diameter 20 0 e Filter Drier TXV Compressor ERN Receiver Accumulator FRONT VIEW j 30 Pressure Relief Valve Internal SS Tank Electric Backup BACK VIEW LEFT SIDE VIEW Integrated expansion tank 9 KW back up electricheat installed 2 stage digital thermostat General Specifications Satin Galvanized cabinet enclosure 316 SS 40 Igpm tank Separate domestic hot water heat exchanger Pressure relief valve Integrated floor circulator pump Pressure guage amp drain valve standard Page 21 13 Feb 00 Maritime Geothermal Ltd Maritime Geothermal Ltd Color Caissie Grey Energy Module Heat Pumps Models EMW 45 65 Style Vertical Date Sunday February Drawn By G Kaye Title Component amp Piping Layout Self Contained Well Water or Groundioop Energy Machine Energy Collector Energy Receiver PE 3408 K Energy Transfer Heat Pump gt A Ea
29. can be bled off through valved ver tical standpipes in the pump module If pressure drops below 25 psig add additional water antifreeze mix with the purge pump to bring the pressure back to the original setting 13 Feb 00 Maritime Geothermal Ltd NORDICG Horizontal Trench Design Closed loop Plastic Earthloop Next trench line Elevation View Next trench line Backfill with heavy dense 6 ft material if excavated biel contains Mein which 3 4 Type 3408 Plastic Undisturbed may damage the tubing Laid in each corner Soil 10 4 10 IMPORTANT NOTES Horizontal style pipe runs should be placed 6 deep x minimum of 48 wide trench as shown above Hand backfilling in the area just over the plastic i e is recommended to prevent crushing or pinching of the pipe during backfilling operations Individual trenches 1 per ton should be spaced a minimum of 10 ft apart to allow the best performance of the groundfield See additional diagrams for pump and piping information Floor Joist p Excavated Trench Insulate all inside lines with armaflex 3 8 wall minimum pe Basement floor Insulate all lines within 10 ft of basement wall with 1 2 armaflex X p Page 18 Maritime Geothermal Ltd 13 Feb 00 NORDIC Series EMW 45 55 65 EN AAA IS SS
30. ciation igshpa provide modeling software to size the heat pump to the home and then size the loop to the demand of the home and heat pump Consideration is given to many factors such as type of ground moisture content and configuration of loops desired It is often possible to shorten loop lengths and resulting costs when using some of the newer Slinky designs of earth loops A comprehensive manual dedicated entirely to the in stallation of groundloops is available from Maritime Geother mal Ltd which describes in detail the techniques involved in installing a closed loop system Vertical Groundloops Vertical groundloop systems are generally the system of choice for commercial and institutional buildings since the land area available is often limited to parking lots with some adjacent landscaped areas Boreholes of 4 to 6 in diameter are drilled with conven tional drilling equipment usually to a depth of less than 300 ft 2 Vertical Boreholes 13 13 Feb 00 Maritime Geothermal Ltd One Example of Piping Layout for Horizontal Closed Loop Heat Pump System ton system shown 60 ft K 4 s lt 10 gt e Type 3408 PE tubing Excavated trenches minimum 4 wide x 6 deep Note Trenches will be backfilled with material which will maximize the thermal conductivity of the adjacent earth trench length Each loop consists of 500 ft of 3 4 type 340
31. d connect a flush cart see diagram to the flushing access ports at the pump station A temporary flush ing system can alternately be constructed using a 45 gal bar rel and a pump with sufficient volume and head capability to circulate fluid at a ve locity of at least 2 ft min through all parts of the loop Begin pumping water through the earthloop making sure that the intake of the pump stays submerged at all times by continuously adding water from a hose etc Water flowing back on the re turn line should be directed below the wa ter level in the barrel or flush tank to pre vent air being mixed with the outgoing water Once the lines have been filled and no more air bubbles are appearing in the line adjust the flow valves to circulate water through the heat pump using the same technique as described above When all air is removed reverse the flow of wa ter through the lines by interchanging the flush cart lines and purge again You will be able to visibly tell when all air is re moved Typical Flush Cart Installing Antifreeze In most mid and northern areas of the US and in all of Canada it is necessary to condition the loop fluid by the addi tion 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 and refrigerant tem peratures inside the heat pump s heat
32. de name Iron Out If you suspect that the supply water being pumped through the unit is of a poor quality or you notice a decrease in performance after several years of use it may be necessary to have the liquid heat exchanger cleaned Maritime Geothermal recommends that a qualified service man be retained to carry out this procedure since the solution involved is highly corrosive The hot side of the heat pump requires no maintenance 11 13 Feb 00 Maritime Geothermal Ltd Diagram A Design 1 Design 2 Parallel piping Reverse Return Header System Series piping 1 or 4 pipes per trench Diagram A Shown above are several of the many possible horizontal loop layouts which have been successfully employed in vari ous types of ground conditions Design 1 Shown is a typical reverse return header system and 2 parallel loops On a 2 ton system each of these loops would be 500 ft long with 4 ft spacing between the U sections 10 ft spacing between the loops and buried 6 ft underground Design 2 is a single loop of 1 1 4 to 1 1 2 diameter pipe with a length of 500 ft x the tonnage of the system and buried to a depth of 6 ft underground Individual runs of pipe should be kept a minimum of 10 ft apart Diagram B Design 3 Design 4 l il 10 ft min i Vertical Parallel Vertical Series Design 3 Shown is a vertical borehole reverse return header system Vertical systems generally
33. dy for addition by referencing Table 1 drain the equivalent amount of water from the flush cart or mixing barrel and replace it with the antifreeze When us ing alcohols be sure to inject it below the water line to reduce initial volatility of the pure antifreeze If the loop is large and the tank is small it may be necessary to refill the tank with anti freeze several times to get all the anti freeze into the loop Pump the loop for 5 to 10 minutes longer to insure the re maining fluid has been well mixed 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 sys tem If an air bladder expansion tank is used the bladder should be charged to the above pressure before actual water pressure is put on the system Systems employing a commercially available loop pump kit that do not have an ex pansion tank thermometers and pressure gauges will experi ence a greater fluctuation of pressure in the loop between winter and summer This fluctuation is normal since expan sion and contraction of the loop fluid must be handled by the elasticity of the plastic loop Pressurize the loop to a pressure of 45 psig when installing a system in the fall going into the heating season If installing in spring or summer charge to 25 psig After operating the machine for a period of time any residual air in the system
34. e electric backup element breakers are energized and the water is below 95 F the electric elements will also be ON with factory aquastat settings Page 13 Feb 00 13 Observe the readings on the high and low pressure gauge set With entering water temperature of 45 to 50 F the suc tion pressure blue gauge should be approximately 53 to 58 psig while the head or discharge pressure red gauge should be in the area of 225 to 300 psig Depending on the tempera ture of the water in the tank Record this information on the warranty test card 14 Using an electronic thermometer or other accurate ther mometer record the supply water temp IN and the water temperature OUT The outlet water temperature should be from 4 to 7 F cooler than the inlet water temperature 15 Record the supply water flow in gpm 16 Record the time required to heat the tank up to tempera ture 17 Record the voltage at the terminal blocks with a digital voltmeter 18 At the electrical disconnect switch place the amprobe jaws around the supply wires and record the current in each General Maintenance As with any piece of equipment there will eventually be some maintenance to be done on the heat pump NORDIC water and loop based heat pumps are equipped with coaxial type heat exchangers These heat exchangers are not manually cleanable however they can be cleaned with a sulfamic acid solution commonly marketed under the tra
35. f the unit 2 Space availability in a mechanical room for the heat pump and associated piping 3 Ease of access to the water well supply and discharge lines or groundloop lines If possible the six main service doors should remain clear of obstruction for a distance of 2 two ft so that servic ing and general maintenance can be carried out with a mini mum of difficulty Raising the heat pump off the floor a few inches 1s generally a good practice since this will prevent un necessary corrosion of the bottom panel of the unit attached We recommend that the heat pump be placed on a piece of 2 Styrofoam covered with 1 4 plywood The Styro foam will smooth out any irregularities in the cement floor while the plywood will distribute the weight of the NOR DIC unit evenly over the Styrofoam This process will also deaden the compressor noise emitted from the bottom of the cabinet As an alternative several pieces of 2 x 4 lumber can be placed under the unit running from the electrical connec tion side to the opposite side of the heat pump Laying the 2 x 4 s in this manner will give the best support since they will be at right angles with the internal steel compressor and heat exchanger support Plumbing the Heat Pump water well application When installed on a water well the NORDIC heat pump must be supplied with an adequate water supply since in essence water is the fuel for the unit It is imperative that the flow
36. it is filled with water before energizing the circuit On systems equipped with ball valves on the domestic hot water lines both valves must be in the open position Never shut off both valves when the heat pump is operational since water expanding in the hot water generator loop may cause damage to the circulator pump housing Slightly open the union on the hot water discharge pipes to make sure that all air is out of the system and the circulator pump is flooded with water 6 Make sure all pumps are wired purged of air and ready to pump water 7 Vacuum out any dust and debris that may have collected in the unit during installation 8 Make sure the unit is sitting level 9 Make sure the proper time delay fuse or breaker has been installed in the electrical box 10 Have the following tools on hand and know how to use them e A refrigeration gauge set Anelectronic or other accurate thermometer e An amprobe e A water flow meter 11 Connect your refrigeration gauge set 12 Turn on the main power switch The compressor should start and water will begin to be heated in the storage tank NOTE If the unit is equipped with an electric TACO water valve the valve will open in 30 to 60 seconds followed by the compressor When the TACO water valve is fully open an internal switch activates the compressor circuit You can observe the rise of temperature in the tank via the Ranco aquastat digital output display If th
37. ith sand or other foreign materials Such contamination can cause premature failure with pumps water valves heat ex changers and return wells To reduce these problems to a minimum a closed secon dary heat exchange system is constructed with Type 3408 Polyethylene Plastic Pipe specifically engineered for the job Materials such as PVC and polybutylene are not recom mended since their underground joining process is not as reli able as the fusion process used with type 3408 polyethylene The earthloop heat exchanger can consist of a single long length of plastic commonly called a series style heat ex changer or more commonly is found as a number of parallel loops connected to a reverse return header system The se ries system for homes or light commercial applications up to 10 tons normally is constructed with 1 1 4 to 2 diameter pipe while the parallel system uses multiple branch loops from 3 4 to 1 connected to a larger header pipe system of 1 1 4 to 2 diameter The parallel system offers several advan tages such as e Less expensive pipe e Easier to handle the smaller pipe e Lower pressure drop e Smaller circulator pump s Of course on larger commercial systems it would not be unusual to find header systems with up to 6 diameter pipe for fluid flow into and out of the building Socket Fusion Mechanical joints or metal fittings of any kind are not acceptable underground in an earth loop system due to large temperat
38. itime Geothermal Ltd NORDIC EMW HW Series Electrical Box 208v 3 60 Box Heating amp Domestic Hot Water Versions Maritime Geothermal Ltd EM Series Heat Pumps Electrical Box Connection Diagram e co Field DO DO T stat OO C ommon Wirin OO R hot 24v AC DO T hermostat 0O Djomestic Hot Ranco e pa Water i Gantal DO Connect R amp T to bring on Od floor circulator Od Connect R and D to turn ob domestic hot water circulator NOTE A Electric Heat Back up is An option which can be acti vated or deactivated by the cus tomer by disconnecting the Electric Heat Breaker amp cy o dc 7 og breaker as required To discon Toe I el e e e e o o wires D E amp F at left Mo II II e Lock Main DHW Out Floor Circ Relay Circ Relay Pump M Elec Heat Relay 1 Comp relay l i I I l l l nect permanently remove i l l I l l l ll System Voltages 208v 3 60 Compressor 120v 1 60 Circulators 208v 1 60 Hot Water Elements 208 24v Trans eatl Compressor S Fi Circuit Breaker O A e Neutral 1 Phase 1 High 5 D q 2 Phase 2 Voltage TY PA A 3 Pha
39. lons per min Nordic EMW 55 Nordic EMW 65 Water Pump System 1 A submersible pump is generally required Must be able to pump the required water flow listed above at a mini mum of 30 psig at the dynamic pumping depth of your well 2 Make sure you select the pump using the pump manufac turers pump chart 3 Usea minimum of 30 gal equivalent air bladder tank 4 Make sure the pump will be able to pump the required flow for the heat pump while maintaining 40 psig on the water lines for usage in the rest of the home Page 50 ft of travel If suitable care 1s taken to insure that the 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 When snow comes it will usually cover the entire process much like a small spring The above information is intended to give the pro spective user purchaser some insight as to the general require ments for a successful application of the NORDIC heat pump 13 Feb 00 Maritime Geothermal Ltd NORDIC EMW Series Open Loop Disposal Methods A Supply Well eo I Pressure Tank Nordic Heat Pump b hd Pitless gt x Adaptor Water Table NEN RERO lu ia A Single Well Pump amp Dump Supply Well Pressure Tank
40. ny ground between the trench and the boreholes and dig a relief no less than 30 times the diameter of the pipe to allow the pipe to bend to the header pipe without kinking Be very careful not to disturb the original ground under the relief so that you do not have to worry about the pipe being kinked through compaction of the earth under the pipe after the trench is backfilled Fuse the individual smaller loops to Propylene Glycol the main header loops and extend these into the home by drill ing through the concrete wall or by rising up the outside of the basement wall or slab and entering the structural part of the home or building above grade Any piping that comes within 10 ft of the structure should be insulated with 3 8 to 1 2 closed cell armaflex insulation to prevent freezing from occurring near any structural part of the building Likewise all piping inside the building must be insulated to prevent condensation and subsequent dripping onto floors or walls Circulator Pump Module When the groundloop has been brought inside the home or building to the location of the heat pump it must be con nected to the pump module which generally consists of 1 Page EN EN 13 Feb 00 Grundfoss Model UPS 26 99 or Taco Model 0011 pump for systems up to 3 ton and 2 pumps for systems up to 5 ton These units must be able to pump at least 2 5 to 3 USgpm per ton of heat pump for proper operation of the system To cal
41. r or larger Well casing properly sealed or grouted into rock 3 Water flow preferably entering well at a depth of 75 ft or more 4 Temperature of well at least 40 F Normally 45 F 5 Well must be able to supply requirements of BOTH heat pump and residence usage at the same time with maxi mum drawdown from static level of 30 ft Nordic EMW 45 1800 Nordic EMW 55 2700 Nordic EMW 65 3500 NOTE Rule of thumb use proper heat load software to determine exact requirements Water Requirements For Nordic Heat Pumps Maritime Geothermal Ltd recommends that anyone consider ing the installation of a heat pump in their home or office have a professional heat loss load calculation prepared on the building to determine the heating and cooling require ments The correct sizing of the heat pump to the home can only be properly accomplished with the use of specialized software programs designed for this job Discharge Water Methods 1 Although we highly recommend it you do NOT neces sarily have to have a return well 2 Some of our customers do one of the following with their return or waste water A Run it into a drain or ditch B Pond river or stream C Leaching field In most instances if you run the water right out on top of the ground it will soak back into the ground in less than Nordic EMW 45 Note These are minimum water requirements based on an entering water temperature of 46 F Igpm Imperial gal
42. requirements listed in the engineering section be closely adhered to Page lt water IN 1 8 D stem Thermome ters amp Pressure gauges 13 Feb 00 When setting up the unit Maritime Geothermal Ltd recommends the installation of a water flow meter on the dis charge line so that the exact amount of water flowing can be determined at a glance Once the correct flow of water has been established and determined to be consis tent the water flow meter could be removed from the line NOTE Installing unions at each end of the meter and similar unions on a piece of pipe of the same length allows the user to insert the meter in the line whenever the flow of water is to be checked and then remove the meter so that it does not deteriorate from day to day usage Plumbing lines both supply and dis charge must be of adequate size to handle the water flow necessary for the heat pump For distances less than 40 ft from the pres sure tank 3 4 copper or plastic lines should be run while for longer distances we recom mend that 1 plastic or copper lines should be run to the heat exchanger Similarly a 1 line should be run from the discharge pipe to the method if disposal Brass fitting on water lines to heat Pump and OUT lines through P T port Install a P T Pete s Plug plug on the Water IN and Water OUT lines just outside the heat pump so that it is easy to record the water in and out temperatures and
43. rth Loop Domestic Hot Water A Supply Return igui LIDO i E Heat l Vertical EOS I i Exchanger Horizontal Trench i Systems i TET T E L The Energy Machine simpilifies the installation of a Water to Water heat pump since it contains all mechanical components required for a typical in floor heating installation with high capacity domestic hot water The contractor need only connect to the supply in and out water lines and the control wiring for the internal circulator pump to have a fully functional system E gt ecce ari LS High Capacity Domestic Hot Water Exchanger gt vo E 3 5 t 3 x 3000 watt electric elements 40 US Compressor Accumulator gal tank G mmm mm a ma ama a amm an ammm Infloor Heating Headers or Fan Coil Units EMW 45 HW EMW 55 HW EMW 65 HW 21 34 61 with 70 56 Elec back up 10 3 10 3 6 3 10 3 6 3 6 3 3 3 TD Fuse or Breaker 30 50 30 d 60 100 60 18 3 thermostat wire for all Page 22 D UY Min Circuit Ampacity Recommended Wire Size m Uy Maritime Geothermal Ltd 13 Feb 00 Performance Specification Sheets Model EMW 45 source jPres Sink Btu s Comp Comp csa Suct Disch er ree m um jure wa ore we cme remover oue ums vere cor eor erue pene 03 5 Il desd 41 92 111 12 7 7 55 225 17 5 4018 4 027 Je
44. s the SET key again to access the stagel cooling or heating mode The LCD will display the current mode ei Page 29 13 Feb 00 Maritime Geothermal Ltd Ranco ETC Thermostats 8 ft extension cable Cover screws 4 Temperature sensor Circuit board Locking switch NOTE The temperature sensor can be extended up to 400 ft by cutting the sensor extension cable and splicing 22 gauge 2 conductor copper wire in place Regular telephone wire can be used for this operation Mounting Holes Shown Be low Conduit Opening 24v Power Connection Stage 1 relay Stage 2 relay stage 1 Stage 2 NC NO C NC C NO Page 30 Maritime Geothermal Ltd 13 Feb 00 NORDIC EMW 45 55 65 HW Series Schematic 230 1 60 Schematic Diagram Neutral Red 120v Floor 9 Circ Pump Floor Pump Relay T2 Compressor Run Cap T1 5 2 Start Cap Comp Relay e L3 T3 Heater Element L2 T2 o Ho Heater Element L1 T4 Heater Element 120v Domestic Circ Pump Thermostat Wiring Electric Heat Relay LM Control transformer 40 va 24v Common C 24v R Floor stat T A dry contact closure between R and T activates the floor circulator pump Ranco Thermostat E e
45. se 3 Field Page 34 Maritime Geothermal Ltd 13 Feb 00 O O LIMITED WARRANTY MARITIME GEOTHERMAL LTD warrants that the heat pumps manufactured by it shall be free from defects in materials and workmanship for a period of 1 ONE YEAR after the date of installation or for a period of 1 ONE YEAR AND 60 SIXTY DAYS after the date of shipment whichever occurs first In addition MARITIME GEOTHERMAL LTD warrants that the compressor shall be free of defects in materials and workmanship for an additional period of 48 FORTY EIGHT MONTHS from said date MARITIME GEOTHERMAL LTD shall at it S option repair or replace any part or parts covered by this warranty which shall be returned to MARITIME GEOTHER MAL LTD transportation charges prepaid which upon examination proves to be defective in materials or workmanship Replacement or repaired parts and compo nents are warranted only for the remaining portion of the original warranty period This warranty is subject to the following conditions l The NORDIC heat pump must be properly installed and maintained in ac cordance with MARITIME Geothermal LTD s installation and maintenance instruct ions 2 The installer must complete the Installation Data Sheet have it endorsed by the owner and return it to Maritime Geothermal Ltd within 21 days after the in stallation of the unit 3 It is the responsibility of the building or general con
46. t switch Ohmmeter shows no resistance be tween common and run terminals or between common and start ter minals Note Be sure compressor overload has had a chance to reset If comp is hot this may take sev eral hours Ohmmeter shows reading when Check for blown fuse at heat pump s disconnect box or blown fuse Determine why the disconnect switch was opened if all is OK close the switch Replace fuse with proper size and type Time delay type D Check total load on system Call power company Determine cause and replace motor If windings are open or overload is placed across R and S terminals and faulty replace compressor infinity between C amp R or C amp S Make sure the internal overload has had time to reset Voltage on line side with contactor held closed but no voltage on one or both terminals on the load side Points pitted or burned Compressor attempts to start but trips it s internal overload after a few seconds Faulty run capacitor Check with ohmmeter for shorts Replace if faulty open etc Page 26 Replace contactor Attempt to rock compressor free If normal operation cannot be es tablished replace compressor Maritime Geothermal Ltd cont Compressor not operating Compressor short cycles HEATING MODE Unit trips off on LOW suction pressure control Unit trips off on HIGH pres control Open control circuit
47. tractor to supply temporary heat to the structure prior to occupancy These heat pumps are designed to provide heat only to the completely finished and insulated structure Start up of the unit shall not be scheduled prior to completion of construction and final duct installation for validation of this warranty If the heat pump manufactured by MARITIME GEOTHERMAL LTD fails to con form to this warranty MARITIME GEOTHERMAL LTD s sole and exclusive li ability shall be at it S option to repair or replace any part or component which is re turned by the customer during the applicable warranty period set forth above pro vided that 1 MARITIME Geothermal LTD is promptly notified in writing upon discovery by the customer that such part or component fails to conform to this war ranty 2 The customer returns such part or component to MARITIME GEOTHER MAL LTD transportation charges prepaid within 30 thirty days of failure and 3 MARITIME GEOTHERMAL LTD s examination of such component shall dis close to it s satisfaction that such part or component fails to meet this warranty and the alleged defects were not caused by accident misuse neglect alteration im proper installation repair or improper testing Page 35 Maritime Geothermal Ltd xm has the solution for all your heating and cooling projects e e Vertical Liquid to Air Liquid to Liquid AV
48. un the loops are the same Header 3 loop design length and diameter Uc Y Y Y Y a o n 4 loop design LO Trench Walls 2 3 ft 34 PE 3408 loops 114 x 34 x 4 tee xN pui 114 x 114 x 4 tee E lt 1 90 elbow L 1 PE 3408 ES Js L p NS 5 loop design WO 34 tee 34 90 elbow Page 10 Maritime Geothermal Ltd tions inside the control box for good connection 2 Check all low voltage thermostat to make sure they are connected properly 3 Turn on the main power switch Allow the power to remain ON without starting the unit for a period of 4 hours Refriger ant migrates to the compressor oil when the compressor is unheated On most units a crankcase heater is standard equip ment on your heat pump and it will warm the compressor dispelling the liquid refrigerant Compressor damage can oc cur if the heat pump has been brought in from a cold location and immediately started up 4 Turn on the water supply and check all plumbing for leaks 5 Check the domestic hot water tank to be sure
49. ure destroying the heat pump Electrical Connections The NORDIC unit is supplied with an opening for 3 4 con duit nipple on the right side of the unit Above this is another 3 8 hole for the thermostat wire A wiring diagram is located Page inside the electrical box cover for quick reference and al though the connections to be made are quite simple Maritime Geothermal Ltd recommends that a properly qualified electri cian be retained to make the connections and wire the thermo stat The NORDIC EM unit has its own digital thermostat which controls both the heat pump first stage and the electric heat second stage Settings are described on page 26 of this man ual Starting the Heat Pump BEFORE starting the heat pump the following areas should be rechecked to assure proper operation 1 Check all high voltage field wiring and electrical connec 13 Feb 00 Maritime Geothermal Ltd 3 4 and 5 Loop Closed Loop Header Designs Typical reverse return 3 ton 3 loop header shown at right In a Reverse return header system the first line out on the supply header is the last 3 2 1 E line back on the return Supply Y Ber n B Header J A reverse return header a gt 3 OU automatically balances the flow in each loop as long as Bet
50. ure fluctuations which may loosen and break clamps and the possibility of eventual corrosion perforation in cou plings and T s Fittings and joints are socket or butt fused together into one contiguous unit using a technique developed by the gas industry A heater tool with the appropriate faces heats both the pipe and fitting for a prescribed period of time and then the two pieces are quickly removed from the heater inserted together and held in place until the joint cools When properly done the resulting joint is stronger than the original pipe with no chance of leaks or breaks For more information on butt and socket fusion techniques see our website at http www Page discribe ca nordic fusion htm or request a copy of the Cen tral Tools Butt and Socket fusion manual Horizontal Groundloops Horizontal groundloop systems are most commonly used where land is readily available since they are cheaper to construct than their vertical counterparts Although many con figurations are available we have found that a parallel system with one 1 500 ft U pipe per ton placed in a 250 ft x 4 ft wide x 6 ft deep trench 1s easy to construct and provides am ple ground impact area to adequately supply a 32 F or better Entering Fluid Temperature to the heat pump even in the most severe winter months See opposite Diagram A Several companies including Thermalworks and the International Ground Source Heat Pump Asso
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