Friedrich H)A09K25 User's Manual
Contents
1. I 21 LOANNOOSIC 6 l ALON 335 SNISIM 36 0 00 880 108 NOWNOD 440 ON 930719 Tin4 3349 7051409 LIOA 3MIM 3LIHM SNI 1005 X SNILV3H YOLVINSNI 15 AVC TWNINYAL NOLLVNIBAOO 8 9 M M TWO 1 15 1 Qv31 aNnouo OVA 5310 30 SS3NHVH 1 15 1 404 3931 93 31 303 SIYM 3531 z 805538402 NO 2 OL 19389 5123 02 HOSS3NdWOO OL 1 SI QvOTN3AO dl L 1 oif oL M3SN30N02 YINYOASNYAL 3155344 NOLIOvdvo x ATNO NOLLdO LAN 9 Xovi8 MOT 3LIHM b 24 3335 MOTI3A gau 3339 ov18 LAN YOLIOVdVO ag 3 AN3IBAV MO1 M3O4SNVAL 52. 10 Heat 5 eric erts 10 Electrical amp Thermostat Wiring Diagrams 11 13 Indoor Blower Air FIOW 14 Condenser Fan 14 Blower Wheel Inspection 14 s 14 Heating Electric 14 External Static 14 Checking External Static Pressure 15 Checking Approximate Airflow 15 Electnc Heat 15 Airflow Charts 16 Refrigerant 0 16 Method Of Charging 17 Undercharged Refrigerant Systems 17 Overcharged Refrigerant Systems 18 Restricted Refrigerant Systems 18 Capillary Tube Systems 19 Reversing Valve Description Operation 19 Electrical Circuit And 19 Testing COll 2 au ete 19 Checking Reversing 20 Touch Testing Heating Cooling Cycle
3. 20 Procedure For Changing Reversing Valve 20 Compressor 21 Locked Rotor Voltage 21 Single Phase Connections 21 Determine Locked Rotor Voltage 21 Locked Rotor Amperage Test 21 Single Phase Running amp Locked Rotor Amperage 21 External Overload eene 21 Checking the External Overload 21 Checking the Internal 21 Compressor Single Phase Resistance Test 22 Compressor Replacemernt 22 uuu ie eer 23 Capacitor Check With Capacitor Analyzer 23 Capacitor Connections 23 Emergency Heat Switch 24 Wiring Diagram Index 25 26 9 18 Electrical Troubleshooting Chart Cooling 39 2 Ton Electrical Troubleshooting Chart Cooling 40 Refrigerant System Diagnosis Cooling 41 Refrigerant System Diagnosis Heating 41 Electrical Troubleshooting Chart Heat Pump 42 Introducti
4. 80004912 29 VHA18K25RTC 80004912 29 VHA18K25RTD 80004912 29 VHA18K25RTE 80004912 29 VHA18K25RTG 80004921 33 VHA18K25RTH 80004921 33 VHA18K34RTA 80004912 29 VHA18K34RTB 80004912 29 VHA18K34RTC 80004912 29 VHA18K34RTD 80004912 29 VHAT18KSARTE 80004912 29 VHA18K34RTG 80004921 33 VHA18K34RTH 80004921 33 VHA18K50RTA 80004912 29 VHA18K50RTB 80004912 29 VHA18K5ORTC 80004912 29 VHA18K50RTD 80004912 29 VHA18K50RTE 80004912 29 VHA18K50RTG 80004921 33 VHA18K50RTH 80004921 33 VHA24K10RTH 80110300 39 VHA24K25RTH 80110300 39 VHA2AK3ARTH 80110300 39 VHA24K50RTH 80110300 39 VHA2AKTSRTH
5. 80110300 39 1uvd 3MIM 0 18 X 16 39NVMO JIOA INT TINS 3LIHM X ANO 7OUINOO 110A 308 x MOLVINSNI DUSWId 034 TWO 1 15 1 Qv31 OVA 2 S310N30 X SS3NYVH 1 15 1 304 QN3931 ANNOW NOIOM OL _ AN3IGNY MOT 5 10 c AV 1009 108 mec 0 WNIWH3L 2 OL 193810 S1O3NNOO 18 55384 OL SI QVOTH3AO 3 310N 193NNOOSIQ HINO SS3NMVH 1 15 1 MO193NNOO Hil Auo xujns v SS3NUVH FHH HOLMS 045 2 193NNOOSIQ 01314 JO 0803 144 5 JILVW3HOS SNISIM 27 15 721 6 0 008 AJY ON 13 4 X E x ING 3LIHA 7OMNINOO LIOA 2 3019 YOLVINSNI 5 034 8 Qv31 annoys OVA 2 5310 30 SOLON OL 71041409 1 MOT 553 dNO2 VNINS31 OL 12340 5123 02 XOVG HOSS3HdWOO OL TVNW3LNI 51 QVO TH3AO 31 3LON vie 7 3 1V3H QION31O0S 102 193NNOOSIQ AANO QION3IOS 102 28 0 11 6750 008 Aaa ON 18 4 10A YOLV
6. 30 dOL OL 123NNOO 3815539 IC M C MAG Noi 5 e 13H zh Nue MASZ 1V3H AYTAY LV3H AYTAY LV3H AYTAY 305534405 1v3H 310N 335 z 310N 335 1 2 i 193NNOOSIQ AIND ANO MA OLP MA SE NoIO G MAY E MASZ X3LY3H 193NNOOSIQ oino JILVWAHOS WVYOVIG 37 SO 00 lt 01 108 ON 19 4 1 ann 1104 LIOA YOLVINSNI 15 1 TWNINYSL NOILLVNIBWOO QNnON9 NOWNOO 38M NMOMB 330 3339 S9NI1005 3LIHM X X SNILV3H TWO 1 15 1 C AvZ 8 9 M A M OVA 5310 30 X 553 ONIMIM 1 15 1 04 3911 GN 39531 AINO N
7. 36 VHAO9SK3ARTH 800004924 36 VHAOSKSORTA 800004912 29 VHAO9SKSORTB 800004912 29 VHAO9SKSORTE 800004912 29 VHAO9SK5O0RTOG 800004924 36 VHAO9SKSORTH 800004924 36 VHA12K25RTA 80004912 29 VHA12K25RTB 80004912 29 VHA12K25RTE 80004912 29 VHA12K25RTG 80004921 33 VHA12K25RTH 80004921 33 12 80004912 29 12 80004912 29 12 80004912 29 2 80004921 33 26 MODEL DIAGRAM PAGE VHA12K34RTH 80004921 33 VHA12K50RTA 80004912 29 VHA12K50RTPB 80004912 29 12 50 80004912 29 VHA12K50RTG 80004921 33 12 50 80004921 33 VHA18K25RTA 80004912 29 VHA18K25RTB
8. MASZ SAv138 1 J SAV138 1v3 EHHE 193NNOOSIQ XIND GION310S 102 28 ALON 33827 AM01 M3S nois wv m z MA OL MA SL 2 5 gt Quvo8 WVYOVIC 9SNISIM 38 9 18 ELECTRICAL TROUBLESHOOTING CHART COOLING Insure that Fuses are good and or that Circuit Breakers are On Set thermostat to Cool move the Temp lever below the present Room Temp Nothing operates entire system appears dead Yes Line voltage present Check Supply Circuit Compressor runs but Eanir ns but Compressor atthe Trans ormer for loose connections an doesn t Compressor doesn t operate Primary No or broken wiring Yes Yes Yes Turn Fan Switch of Room Thermostat to On 24 Volts at ST See Refrigerant Circuit Transformer Problems indicated with diagnosis if unit still is Secondary No Control Transformer not cooling properly position or jump R to G at Terminal board Yes 24 Volts present at Check Supply Circuit Cool Relay for loose connections or broken wiring Yes No Problems indicated with Room Thermostat or Does Fan Motor operate Control Wiring now No Problem indicated in Yes 24Volts at Coil Termi
9. 34 VEA12K50RITE 80004911 30 VEA09K25 RTA 80004911 30 VEA12K50RTG 80004920 32 09 25 80004911 30 VEA12K50RTH 80004920 32 VEA09K25RTE 80004911 30 VEA18K00RTA 80004910 28 VEA09K25RTG 80004923 35 VEA18K00RTB 80004910 28 VEA09K25RTH 80004923 35 VEA18KOORTTC 80004910 28 VEAO9SKSARTA 80004911 30 VEA18KOORTD 80004910 28 VEAO9K34RTB 80004911 30 VEAT18KOORTPE 80004910 28 VEAO9SKSARTE 80004911 30 VEA18KOORTOG 80004919 VEAO9SKSARTOG 80004923 35 VEA18KOO0RTH 80004919 VEAO9K34RTH 80004923 35 VEA18K25RTA 80004911 30 VEA09K50RTA 80004911 30 VEA18K25RTB 80004911 30 5 80004911 30 VEA18K25RTC 80004911 30 VEAO9SKSORTE 80004911 30 VEA18K25RTD
10. 80004911 30 VEA09K50RTG 80004923 35 VEA18K25RTE 80004911 30 VEAO9SKSORTH 80004923 35 VEA18K25RTG 80004920 32 VEA12KO0O0RTA 80004910 28 VEA18K25RTH 80004920 32 2 80004910 28 80004911 30 2 80004910 28 VEAT18K3ARTB 80004911 30 12 00 80004919 31 VEAT18K3ARTC 80004911 30 VEA12K00RTH 80004919 31 VEA18K34RTD 80004911 30 VEA12K25RTA 80004911 30 VEA18K34RTE 80004911 30 2 25 80004911 30 VEA18K34RTG 80004920 32 VEAT12K25RTE 80004911 30 VEAT18K3ARTH 80004920 32 VEA12K25RTG 80004920 32 VEA18K50RTA 80004911 30 2 25 80004920 32 VEA18K50RTB 800049
11. L8Vd 10A 3NI1 7104 70591409 3O1V10SNI 215 14 NOLLVNIBWOO Qv31 NMO38 3018 230 3549 AJNO X X SNIIOOO OWA S310N30 8 9 M A 8M TIVO 1 15 1 SS3NHVH 1 15 1 304 3931 YOLIOVdVO 0553 4 02 YSNYOASNV 1 HOLIMS 35055354 YOLOW MOT 79 i THH JILVA3HOS E 193NNOOSIQ Q3vo8 OL SOLON X0v18 LAN AVI3H MOTA gN3931 MNOLIOvdvO YOLOW OL YOLOW 35 3339 MOTI3A LAN f N LJ G38 lOMLNOO 8 HOLIMS 35055359 HdWOO 071 2 WOO aad auvod Wal STVNINYSL JO MOY 401 01 LOANNOOD YOSSAYdWOD
12. Shipping Weight Lbs 125 135 155 180 125 135 155 180 R 22 Charge Normal Value Wet Coil 1 ESP 25 ELECTRIC HEAT DATA VEA VHA09 12 29 42 23 5 27 42 63 5 5 2 VEA VHA18 24 VE VHA18 24 2500 2050 3400 2780 5000 4090 2500 2050 3400 2780 5000 4090 7500 6135 10000 8180 lt Heater Watts 230208 230208 Heating 8500 7000 11600 9500 17000 13900 8500 7000 11600 9500 17000 13900 25598 20939 34130 27918 Heating Current Amps 10 6 9 3 14 5 12 5 20 9 18 2 10 9 9 9 14 8 13 4 21 7 19 7 32 6 29 5 43 5 39 3 lt Minimum CreuitAmpact 2525 VERT I PAK E G SUFFIX CHASSIS SPECIFICATIONS Model o o o 9 8 2 Chassis Width Chassis Depth ShipingWxDxH 26 x285 x350 26 x 28 5 x 35 26 x 28 5 x 35 26 x 28 5 x 50 3 4 3 4 3 4 3 4 Ma DuctESP in water Height includes 2 duct collar amp isolators under unit Factory collar accepts 10 flex duct Chassis Height VEA VHA9K 24K COOLING DATA Cooling Btu h VEAO9K 9500 9300 VEA12K 11800 11500 18 18000 17800 24 09 9500 9300 12 11800 11500 18 18000 17800 VHA24K Cooling Power W
13. Add values C to S and C to R together and check resis tance from start to run terminals S to R Resistance S to R should equal the total of C to S and C to R In a single phase PSC compressor motor the highest value Will be from the start to the run connections 5 to R The next highest resistance is from the start to the common con nections S to C The lowest resistance is from the run to common C to R Before replacing a compressor check to be sure it is defective Check the complete electrical system to the compressor and compressor internal electrical system check to be certain that compressor is not out on internal overload Complete evaluation of the system must be made whenever you suspect the compressor is defective If the compressor has been operating for sometime a careful examination must be made to determine why the compressor failed Many compressor failures are caused by the following condi tions 1 Improper air flow over the evaporator 2 Overcharged refrigerant system causing liquid to be re turned to the compressor Restricted refrigerant system 4 Lack of lubrication Liquid refrigerant returning to compressor causing oil to be washed out of bearings 6 Noncondensables such as air and moisture in the system Moisture is extremely destructive to a refrigerant system NOTE OHM Figures are for examples only not actual values for the compressor 3
14. Problem indicated in Control wiring and or Yes Room Thermostat Line Voltage available at fan speed switch on models so equipped Yes Is Line Voltage present Spocd Switch at Motor Leads No models so equipped or Blower Relay on later Yes models Check Capacitor is Capacitor Good HE Replace Capacitor Yes Motor should run aca thoroughly 40 No Insure that Fuses are good and or that Circuit Breakers are On Set thermostat to Cool move the Temp lever below the present Room Temp Compressor outdoor fan motor and indoor blower should now operate See Refrigerant Circuit diagnosis if unit still is not cooling properly Problem indicated in Control Wiring and or Room Thermostat Problems indicated in Blower Relay Supply Circuit problems loose Connections or bad Relays Replace Capacitor and or Start Assist Device Allow ample time for pressures to equalize Possible Compressor problem indicated See Compressor Checks Nothing operates entire system appears dead Yes Line voltage present at the Transformer Yes 24 Volts at Transformer Yes 24 Volts present at Yes Outdoor fan motor operates but com pressor doesn t Yes Is Locked Rotor Voltage a minimum of No 197 Volts Yes Are Capacitor and if so equipped Sta No Resist goed Yes Have System Pressure
15. 880 1093 2070 905 1124 EER 10 8 10 8 8 7 10 5 10 5 Sensible Heat Ratio 0 74 0 72 0 70 0 74 0 72 HEAT PUMP DATA Heating Btu h 8500 8300 10600 10400 47 F 3 0 3 2 Heating Power W 830 971 Heating Current DAT 5 5 6 1 ELECTRICAL Voltage 1 Phase 60 Hz 230 208 230 208 230 208 230 208 230 208 230 208 230 208 230 208 Volt Range 253 198 253 198 253 198 253 198 253 198 253 198 253 198 253 198 Cooling Current 4 9 5 3 9 2 10 2 11 2 12 4 5 0 5 5 9 2 10 2 11 2 12 4 Amps L R 21 47 68 21 47 68 Amps F L 4 5 7 9 10 2 4 5 79 10 2 Indoor Motor HP 1 4 1 4 1 4 1 4 1 4 1 4 Indoor Motor A 12 14 2 1 2 14 2 Outdoor Motor HP N A N A N A N A Outdoor Motor A 2 2 Indoor CFM Vent CFM Max ESP 3 227 3 3 Dimensions W x D x H Net Weight Lbs Shipping Weight Lbs R 22 Charg Normal Value Wet Coil 1 ESP ELECTRIC HEAT DATA VEA VHA09 12 pu 09 VE VHA12 230 208 230 208 VEA VHA18 24 ee 18 24 Heater Watts 2500 2050 3400 2780 5000 4090 2500 2050 3400 2780 5000 4090 7500 6135 10000 8180 230 208 230 208 Heating Btu h 8500 7000 11600 9500 17000 13900 8500 7000 11600 9500 17000 13900 25
16. Due to continuing research in new energy saving technology specifications are subject to change without notice Sequence of Operation Agood understanding of the basic operation of the refrigeration system is essential for the service technician Without this understanding accurate troubleshooting of refrigeration system problems will be more difficult and time consuming if not in some cases entirely impossible The refrigeration system uses four basic principles laws in its operation they are as follows 1 Heat always flows from a warmer body to a cooler body 2 Heat must be added to or removed from a substance before a change in state can occur 3 Flow is always from a higher pressure area to a lower pressure area 4 The temperature at which a liquid or gas changes state is dependent upon the pressure The refrigeration cycle begins at the compressor Starting the compressor creates a low pressure in the suction line which draws refrigerant gas vapor into the compressor The compressor then compresses this refrigerant raising its pressure and its heat intensity temperature The refrigerant leaves the compressor through the discharge line as a HOT high pressure gas vapor The refrigerant enters the condenser coil where it gives up some of its heat The condenser fan moving air across the coil s finned surface facilitates the transfer of heat from the refrigerant to the relatively cooler outdoor
17. e FOR 208 VOLT MODELS ONLY THERMOSTAT CONNECTIONS mr MOVE THE WHITE WIRE AS SHOWN BELOW REAR Friedrich e RT1 THERMOSTAT L COMMON NOT USED RT1 z THERMOSTAT COIL SOLENOID BROWN SAMPLE WIRING DIAGRAM m 1 DEFROST b BLACK QUICK DISCONNECT r pen te ua 375 CXS LOWAMBIENT CONTROL CAPACITOR COMPRESSOR REF THE DIAGRAM ABOVE ILLUSTRATES THE TYPICAL THERMOSTAT WIRING AND 208 VOLT TRANSFORMER WIRING SEE THE UNIT CONTROL PANEL FOR THE ACTUAL UNIT WIRING DIAGRAM AND SCHEMATIC 12 Typical Electrical amp Thermostat Wiring Diagrams A E Suffix THERMOSTAT CONNECTIONS THERMOSTAT FOR 208 VOLT MODELS ONLY FRONT MOVE THE WHITE WIRE AS SHOWN BELOW 208 V 240 V TRANSFORMER T STAT HARNESS PART B T STAT HARNESS PART SAMPLE WIRING DIAGRAM SUPPLY CORD OR FIELD WIRING COIL SOLENOID NOT USED 2266 Indoor Blower Airflow The current Vert Pak 9 12 amp 18 use a dual shaft permanent split capacitor single speed motor to drive indoor blower and outdoor fan Earlier model VERT I Pak units used 2 speed motors The Vert I Pak 24 uses an individual single shaft permanent split capacitor single speed motor for the indoor blower and a separate motor drives the outdoor fan D
18. temperature As the control shaft is rotated clockwise through the adjustment range continuity will be read between Terminal 2 and Terminal 3 providing the temperature of the capillary tube is above 25 5 If the temperature at the capillary tube is above approximately 52 degrees it may be necessary to place the end of the capillary tube in ice water to determine if the control is sensing temperature changes Should the control lose the gas charge in the capillary tube it will fail to the electric heat position and the compressor will not operate Emergency Heat Switch SWITCH POSITION EMERGENCY HEAT 24 TEMPERATURE AT CAPILLARY CONTINUITY READ 1and2 ElectricHeat 1and2 ElectricHeat 2 Electric Heat ANYWHERE IN ADJUSTMENT RANGE ABOVE SET POINT 2 and 3 Compressor ANYWHERE IN _ ADJUSTMENT RANGE BELOW SET POINT 1 and 2 Electric Heat Wiring Diagram Index MODEL DIAGRAM PAGE MODEL DIAGRAM PAGE 9 0 RTA 80004910 28 VEAT2K3ARTG 80004920 32 VEAO9SKOORTB 80004910 28 VEAT2K3ARTH 80004920 32 VEAO9SKOORTE 80004910 28 VEA12K50RTA 80004911 30 VEAO9SKOORTSG 80004922 34 VEAT12K50RTB 80004911 30 9 80004922
19. the earlier model Paks are sealed systems service process tubes will have to be installed First install a line tap and remove refrigerant from system The H suffix model Vert I Paks have factory installed ser vice values Make necessary sealed system repairs and vacuum system Weigh in charge according to the unit data plate Crimp process tube line and solder end shut Do not leave a service valve in the sealed system Proper refrigerant charge is essential to proper unit operation Operating a unit with an improper refrigerant charge will result in reduced performance capacity and or efficiency Accordingly the use of proper charging methods during servicing will insure that the unit is functioning as designed and that its compressor will not be damaged Too much refrigerant overcharge in the system is just as bad if not worse than not enough refrigerant undercharge They both can be the source of certain compressor failures if they remain uncorrected for any period of time Quite often other problems such as low air flow across evaporator etc are misdiagnosed as refrigerant charge 16 Chart Correction Multipliers Correction Multipliers for 230V 208V cooling 095 Chart B Correction Factors Correction Factor To Correct for 230 Volts 208 Volts Dry Coil Wet Coil Chart C VEA VHA24K 1 ESP 2 ESP 3 ESP 4 ESP values listed are i
20. there is no refrigerant charge left in the unit To charge by this method requires the following steps 1 Install a piercing valve to remove refrigerant from the sealed system Piercing valve must be removed from the system before recharging 2 Recover Refrigerant in accordance with EPA regulations Install a process tube to sealed system Make necessary repairs to system Evacuate system to 300 microns or less o Weigh refrigerant with the property quantity of R 22 refrigerant Start unit and verify performance 8 Crimp the process tube and solder the end shut NOTE In order to access the sealed system it be necessary to install Schrader type fittings to the process tubes the discharge suction the compressor Proper recovery refrigerant procedures need to be adhered to as outlined in EPA Regulations THIS SHOULD ONLY BE ATTEMPTED BY QUALIFIED SERVICE PERSONNEL Undercharged Refrigerant Systems An undercharged system will result in poor performance low pressures etc in both the heating and cooling cycle Whenever you service a unit with an undercharge of refrigerant always suspect a leak The leak must be repaired before charging the unit To check for an undercharged system turn the unit on allow the compressor to run long enough to establish working pressures in the system 15 to 20 minutes During the cooling cycle you can listen carefully at the e
21. 11 30 VEA12K34RTA 80004911 30 VEA18K50RTC 80004911 30 VEA12K34RTB 80004911 30 VEA18K50RTD 80004911 30 VEA12K34RTE 80004911 30 VEA18K50RTE 80004911 30 MODEL DIAGRAM PAGE VEA18K50RTG 80004920 32 VEA18K50RTH 80004920 32 VEA24KOORTH 80110500 37 80108800 38 VEA24K25RTH 80108800 38 VEA24K34RTH 80108800 38 VEA24KS5O0RTH 80108800 38 VEA24K75RTH 80108800 38 VHAO9K25RTA 800004912 29 VHAO9SK25RTB 800004912 29 VHAO9K25RTE 800004912 29 VHAO9SK25RTG 800004924 36 VHAO9SK25RTH 800004924 36 VHAO9SK3ARTA 800004912 29 9 800004912 29 VHAO9SK3ARTE 800004912 29 VHAO9SK3ARTOG 800004924
22. 16 OHMS 49 OHMS 3 65 OHMS RESISTANCE RESISTANCE EQUALS RESISTANCE 22 Recommended Procedure for Compressor Replacement NOTE Be sure power source is off then disconnect all wiring from the compressor 1 Be certain to perform all necessary electrical and refrigera tion tests to be sure the compressor is actually defective before replacing 2 Recoverallrefrigerant from the system though the process tubes PROPER HANDLING OF RECOVERED RE FRIGERANT ACCORDING TO EPA REGULATIONS IS REQUIRED Do not use gauge manifold for this purpose if there has been a burnout You will contaminate your manifold and hoses Use a Schrader valve adapter and copper tubing for burnout failures 3 After all refrigerant has been recovered disconnect suction and discharge lines from the compressor and remove com pressor Be certain to have both suction and discharge process tubes open to atmosphere 4 Carefully pour a small amount of oil from the suction stub of the defective compressor into a clean container 5 Using an acid test kit one shot or conventional kit test the oil for acid content according to the instructions with the kit 6 If any evidence of a burnout is found no matter how slight the system will need to be cleaned up following proper procedures T Install the replacement compressor 8 Pressurize with a combination of R 22 and nitrogen and leak test all connections with an electronic or Halide leak
23. 598 20939 34130 27918 10 6 9 3 14 5 12 5 20 9 18 2 10 9 9 9 14 8 13 4 21 7 19 7 32 6 20 5 43 5 39 3 Minimum Circuit Ampacit 17 2 15 9 22 1 20 3 30 7 28 1 44 3 40 4 57 9 52 7 Branch Circuit Fuse Amps 25 25 25 25 35 30 45 45 60 60 Basic Heater Size 10 0 Kw VERT I PAK A D SUFFIX CHASSIS SPECIFICATIONS Voltage V Refrigerant Chassis Width Chassis Depth Chassis Height Shipping W x D x H Supply Duct Collar Drain Connection Drain Hose Thermostat Harness Power Cord Min Circuit Amps See Chassis Nameplate CFM Indoor Page 15 Fan Speeds NOTES Height includes 2 duct collar amp isolators under unit Factory collar accepts 10 flex duct MODELS V E H AO9K25 V E H A09K34 V E H A09K50 V EH A12K25 V EH A12K34 V EH A12K50 18 25 18 34 V EH A18K50 78 MIN Amps A 30 30 Power Connection POWER CORD WITH OPTION TO HARD WIRE unt With n indoor I 550 4 4 m 9 9 5 8 230V 174 230V 1 4HP 2304 1 4 230v 4 230V 1 4HP 230V 1 4HP 230 1 4 230V 1 4HP 230V 1 4 Motor Amps 4__ 14 Height includes 2 high duct collar and 5 8 isolators under unit Normal Value Dry Coil on High Speed 3 ESP Capacity rated at standard conditions COOLING 95 F DB 75 F WB outdoor 80 F DB 67 F WB indoor HEATING reverse cycle 47 F DB 43 F WB outdoor 70 F DB 60 F WB indoor
24. INSNI OUSWId NOLINNIBNOD AlN3IGAY BMW 1005 NE 1V3H 1334405519 5 ANNON OL N3595 M31V3H ns 330 00 3 18 SNILV3H Jam A 3 TWO 1415 1 OWA S3LONJO X SS3NHVH 1915 1 804 QN3931 03501 10N 553 JJM 5 wossauanoo T OL 12380 5123 02 0 18 MOSS3MdMOO OL TWNAGLNI SI QVO TI3AO 31 ALON 1293NNOOSIG 553 33A 1V1S 1 551 30193NNOO SS3NUVH uo YOLONGNOD RLOONS 07313 YO QNOD Adds SNIMIM 29 00 6 690 008 A34 ON 5 JILVW3H2S NORINO NMONE JAM MOTA 3HW WVYOVIC ONISIM 12 690 008 1894 JILVW3H2S 3HM MOTA Sum 32 22 690 008 ON 33 oo 2 690 008 gt NMOSNS ON 18 4 5 ONISIM 34 00 2 6 0 008 A38 18 2 WvaoviQ 35 0 00 5 lt 01 108 A38
25. OILdO N3lV3H SIYM 353 1 HOSS3HdWOO NO Ou OL 123 0 SL23NNOO MOSS3MdWOO OL 1 SI QVOTH3AO 4171 ALON YIWYOJSNYYL HOLIMS 38155384 Noli vdvo 305534409 1 OL M3SN30NO9 7101409 1N3IBWV N3385 YOLYTNSNI 1505330 1 15 1 wOLIOWdWO zc AV I3M WA 3 1nN H8 9 H M 5 Xov18 X JOXLNOD 3 YINYOISNYAL QNvOB Wi3L 30 401 OL 193NNOO VN 1N3IBAV nove 02 MOSS3NdWO2 2 E MASZ 2 AVT3 5 AVY AVY AYAY A38 3unss3ud 1 3 1 1V3H
26. TH FROM ELECTRICAL SHOCK When working on high voltage equipment turn the electrical power off before attaching test leads Use test leads with alligator type clips clip to terminals turn power on take reading turn power off before removing leads Compressor Checks Locked Rotor Voltage L R V Test Locked rotor voltage L R V is the actual voltage available at the compressor under a stalled condition Single Phase Connections Disconnect power from unit Using a voltmeter attach one lead of the meter to the run R terminal on the compressor and the other lead to the common C terminal of the com pressor Restore power to unit CAUTION Make sure that the ends of the lead do not touch the compressor shell since this will cause a short circuit Determine L R V Start the compressor with the voltmeter attached then stop the unit Attempt to restart the compressor within a couple of seconds and immediately read the voltage on the meter The compressor under these conditions will not start and will usually kick out on overload within a few seconds since the pressures in the system will not have had time to equalize Voltage should be at or above minimum voltage of 197 VAC as specified on the rating plate If less than minimum check for cause of inadequate power supply i e incorrect wire size loose electrical connections etc Amperage L R A Test The running amperage of the compressor is the most import
27. actory set blower speeds should provide the proper airflow for the size Cooling capacity of the unit when connected to a properly sized duct system Cooling VEA VHA 24 When the thermostat is set for cooling mode SYSTEM switch set to COOL and FAN switch to AUTO a rise in room temperature will make It also causes a 24 volt signal on the Y thermostat conductor through the high pressure and low ambient switches energizing the compressor relay turning on the compressor and outdoor fan motor A 24 volt signal on the thermostat terminal to the Fan Relay turning on the indoor blower motor 14 Heating Electric When using electric heaters select the blower speed that provides adequate airflow across the elements to prevent overheating and cycling on limit and or premature failure CHECK THE EXTERNAL STATIC PRESSURE and then consult the AIR FLOW DATA to determine the ACTUAL air flow delivered for the factory selected fan speed This will be especially important on change outs using an existing duct system that may not have been properly sized to begin with Heating VEA VHA 24 When the thermostat is set for heating mode System switch set to HEAT and FAN switch to AUTO it will make a 24 volt signal on the B thermostat terminal to energize the Reversing Valve Relay A drop in room temperature will make a 24 volt signal on the W thermostat terminal to the Defrost Thermostat and G thermostat terminal to the Fan Rela
28. air When a sufficient quantity of heat has been removed from the refrigerant gas vapor the refrigerant will condense i e change to a liquid Once the refrigerant has been condensed changed to a liquid it is cooled even further by the air that continues to flow across the condenser coil The Vert I Pak design determines at exactly what point in the condenser the change of state i e gas to a liquid takes place In all cases however the refrigerant must be totally condensed changed to a liquid before leaving the condenser coil The refrigerant leaves the condenser coil through the liquid line as a WARM high pressure liquid It next will pass through the refrigerant drier if so equipped It is the function of the drierto trap any moisture present in the system contaminants and LARGE particulate matter The liquid refrigerant next enters the metering device The metering device is a capillary tube The purpose of the metering device is to meter i e control or measure the quantity of refrigerant entering the evaporator coil In the case of the capillary tube this is accomplished by design through size and length of device and the pressure difference present across the device Since the evaporator coil is under a lower pressure due to the suction created by the compressor than the liquid line the liquid refrigerant leaves the metering device entering the evaporator coil As it enters the evaporator coi
29. ant of these readings A running amperage higher than that indicated in the performance data indicates that a problem exists mechanically or electrically Single Phase Running and L R A Test NOTE Consult the specification and performance section for running amperage The L R A can also be found on the rating plate Select the proper amperage scale and clamp the meter probe around the wire to the C terminal of the compressor Turn on the unit and read the running amperage on the meter If the compressor does not start the reading will indicate the locked rotor amperage L R A External Overload Some compressors are equipped with an external overload which senses both motor amperage and winding temperature High motor temperature or amperage heats the overload causing it to open breaking the common circuit within the compressor Heat generated within the compressor shell usually due to recycling of the motor is slow to dissipate It may take anywhere from a few minutes to several hours for the overload to reset Checking the External Overload With power off remove the leads from compressor terminals If the compressor is hot allow the overload to cool before starting check Using an ohmmeter test continuity across the terminals of the external overload If you do not have continuity this indicates that the overload is open and must be replaced Internal Overload Some compressors are equipped with an internal ove
30. apacitor is open or shorted It will tell whether the capacitor is within its microfarads rating and it will show whether the capacitor is operating at the proper power factor percentage The instrument will automatically discharge the capacitor when the test switch is released Capacitor Connections The starting winding of a motor can be damaged by a shorted and grounded running capacitor This damage usually can be avoided by proper connection of the running capacitor terminals L2 11 TYPICAL DUAL CAPACITOR WIRING From the supply line on a typical 230 volt circuit a 115 volt potential exists from the R terminal to ground through a possible short in the capacitor However from the S or start terminal a much higher potential possibly as high as 400 volts exists because of the counter EMF generated in the start winding Therefore the possibility of capacitor failure is much greater when the identified terminal is con nected to the S or start terminal The identified terminal should always be connected to the supply line or R terminal never to the S terminal When connected properly a shorted or grounded run ning capacitor will result in a direct short to ground from the R terminal and will blow the line fuse The motor protector will protect the main winding from excessive temperature 23 Emergency Heat Switch Defrost Thermostat Continuity Check Electric Heat Switch Operation Heat Pumps Only Th
31. ate some of the same symptoms as an overcharged system An over charge can cause the compressor to fail since it would be slugged with liquid refrigerant The charge for any system is critical When the compressor is noisy suspect an overcharge when you are sure that the air quantity over the evaporator coil is correct Icing Restricted Refrigerant Systems A quick check for either condition begins at the evaporator With a partial restriction there may be gurgling sounds at the metering device entrance to the evaporator The evaporator in a partial restriction could be partially frosted or have an ice ball close to the entrance of the metering device Frost may continue on the suction line back to the compressor Often a partial restriction of any type can be found by feel as there is a temperature difference from one side of the restriction to the other With a complete restriction there will be no sound at the metering device entrance An amperage check of the compressor with a partial restriction may show normal current when compared to the unit specification With a complete restriction the current drawn may be considerably less than normal as the compressor is running in a deep vacuum no load Much of the area of the condenser will be relatively cool since most or all of the liquid refrigerant will be stored there The following conditions are based primarily on a system in the cooling mode Troubleshooting a restri
32. cted refrigerant system can be difficult The following procedures are the more common problems and solutions to these problems There are two types of refrigerant restrictions Partial restrictions and complete restrictions A partial restriction allows some of the refrigerant to circulate through the system With a complete restriction there is no circulation of refrigerant in the system 18 Accumulator Suction Pressure Noticeably High Pressure Slightly Higher utdoor Compressor Slugged with Refrigerant Overcharged System of the evaporator will not be encountered because the refrigerant will boil later if at all Gauges connected to system will usually have higher head pressure depending upon amount of overcharge Suction pressure should be slightly higher Reversing Valve Accumulator Suction Pressure Indoor Coil Lower Outdoor Coil Gauges may equalize very slowly Partially Restricted System Suction Pressure Deep Vacuum Indoor Coil Outdoor Coil Gauges will not equalize with unit shut off Completely Restricted System Restricted refrigerant systems display the same symptoms as low charge condition When the unit is shut off the gauges may equalize very slowly Gauges connected to a completely restricted system will run in a deep vacuum When the unit is shut off the gauges will not equalize at all Metering Device Capillary Tube Systems All
33. ded Breaker Grounding Wire Sizing Use recommended wire size given in the tables below and install a single branch circuit All wiring must comply with local and national codes NOTE Use copper conductors only Room Thermostats Room thermostats are available from several different manufacturers in a wide variety of styles They range from the very simple Bimetallic type to the complex electronic set back type all cases no matter how simple or complex they are simply a switch or series of switches designed to turn equipment or components ON or OFF at the desired conditions An improperly operating or poorly located room thermostat can be the source of perceived equipment problems A careful check of the thermostat and wiring must be made then to insure that it is not the source of problems Location The thermostat should not be mounted where it may be affected by drafts discharge air from registers hot or cold or heat radiated from the sun or appliances The thermostat should be located about 5 Ft above the floor in an area of average temperature with good air circulation Close proximity to the return air grille is the best choice Mercury bulb type thermostats MUST be level to control temperature accurately to the desired set point Electronic digital type thermostats SHOULD be level for aesthetics Measuring Current Draw Thermostat Sub base Ammeter Heat Anticipators Heat ant
34. detector Recover refrigerant and repair any leaks found Repeat Step 8 to insure no more leaks are present 9 Evacuate the system with a good vacuum pump capable of a final vacuum of 300 microns or less The system should be evacuated through both liquid line and suction line gauge ports While the unit is being evacuated seal all openings on the defective compressor Compressor manufacturers will void warranties on units received not properly sealed Do not distort the manufacturers tube connections 10 Recharge the system with the correct amount of refriger ant The properrefrigerant charge will be found on the unit rating plate The use of an accurate measuring device such as a charging cylinder electronic scales or similar device is necessary HAZARD OF SHOCK AND ELECTROCUTION A CAPACITOR HOLD CHARGE FOR LONG PERIODS OF TIME A SERVICE TECHNICIAN WHO TOUCHES THESE TERMINALS CAN BE INJURED NEVER DISCHARGE THE CAPACITOR BY SHORTING ACROSS THE TERMINALS WITH A SCREWDRIVER Capacitors Many motor capacitors are internally fused Shorting the terminals will blow the fuse ruining the capacitor A 20 000 ohm 2 watt resistor can be used to discharge capacitors safely Remove wires from capacitor and place resistor across terminals When checking a dual capacitor with a capacitor analyzer or ohmmeter both sides must be tested Capacitor Check With Capacitor Analyzer The capacitor analyzer will show whether the c
35. e electric heat switch is a dual function control and is shown on the wiring diagram as a defrost thermostat It may be adjusted using a screwdriver As the control shaft is rotated counter clockwise a detent will be encountered Turning the control past the detent will lock out the compressor and acts as an emergency heat switch Turning the control shaft clockwise will lower the change over point for compressor operation The control it self is a double throw single pole switch operated by a bellows and a gas filled capillary tube The capillary tube senses a combination of outdoor coil temperature and outdoor air temperature As the combined temperatures reach a point that the outdoor coil is iced where heat pump operation is no longer efficient the control shuts off the compressor and turns on the electric heat At its lowest setting the cut off point is approximately 25 degrees the highest setting is 52 degrees with a 10 degree differential It is possible under certain conditions for the unit to cycle between compressor and electric heat operation EMERGENCY HEAT Electric Heat Switch Check Out The switch may be checked out with an ohmmeter Remove and label the three wires from the switch Terminal 2 is common and the contacts make to Terminal 3 on temperature rise and to Terminal 1 on temperature fall With the control set in the emergency heat position continuity should be read between Terminal 2 and Terminal 1 regardless of coil
36. flow requirements are calculated as follows Having a wet coil creates additional resistance to airflow This addit ional resistance must be taken into consideration to obtain accurate airflow information 1 TON SYSTEM 18 000 Btu Operating on high speed 230 volts with dry coil measured external static pressure 20 Air Flow 500 In the same SYSTEM used in the previous example but having a WET coil you must use a correction factor of 94 i e 500 x 94 470 CFM to allow for the resistance internal of the condensate on the coil Itis important to use the proper procedure to check external Static Pressure and determine actual airflow Since in the case of the VERT I PAK the condensate will cause a reduction in measured External Static Pressure for the given airflow It is also important to remember that when dealing with VERT I PAK units that the measured External Static Pressure increases as the resistance is added externally to the cabinet Example duct work filters grilles Checking Approximate Airflow If an inclined manometer or Magnehelic gauge is not available to check the External Static Pressure or the blower performance data is unavailable for your unit approximate air flow call be calculated by measuring the temperature rise then using tile following criteria KILOWATTS x 3413 Temp Rise x 1 08 CFM Electric Heat Strips The approximate CFM actually being delivered can be calculated by usin
37. g the following formula DO NOT simply use the Kilowatt Rating of the heater i e 2 5 3 4 5 0 as this will result in a less than correct airflow calculation Kilowatts may be calculated by multiplying the measured voltage to the unit heater times the measured current draw of all heaters ONLY in operation to obtain watts Kilowatts are than obtained by dividing by 1000 EXAMPLE Measured voltage to unit heaters is 230 volts Measured Current Draw of strip heaters is 11 0 amps 230 x 11 0 2530 2530 1000 2 53 Kilowatts 2 53 x 3413 8635 Supply Air 95 F Return Air 75 F Temperature Rise 20 20 x 1 08 21 6 8635 400 CFM 21 6 CAUTION IMPORTANT FLEX DUCT CAN COLLAPSE AND CAUSE AIRFLOW RESTRICTIONS DO NOT USE FLEX DUCT FOR 90 DEGREE BENDS OR UNSUPPORTED RUNS OF 5 FT OR MORE Airflow Charts A D Suffix Chart A 230 Volts DRY COIL Model V E H A09 A12 Fan Speed gt High ESP in water V E H A18 NA 4 NA 517 373 347 500 470 Ductwork Preparation Pull the flex duct tight Extra flex duct slack can greatly increase static pressure Explanation of charts Chart is the nominal dry coil VERT I PAK CFMs Chart B is the correction factors beyond nominal conditions Chart Model 18000 12000 9000 00 520 40 to 50 40 20 500 30 490 Refrigerant Charging Note Because
38. icipators are small resistance heaters wired in series with the W circuit and built into most electromechanical thermostats Their purpose is to prevent wide swings in room temperature during system operation in the HEATING mode Since they are wired in series the W circuit will open if one burns out preventing heat operation The heat anticipator provides a small amount of heat to the thermostat causing it to cycle turn off the heat source just prior to reaching the set point of the thermostat This prevents exceeding the set point 10 Thermostat Location THERMOSTAT In order to accomplish this the heat output from the anticipator must be the same regardless of the current flowing through it Consequently some thermostats have an adjustment to compensate for varying current draw in the thermostat circuits The proper setting of heat anticipators then is important to insure proper temperature control and customer satisfaction A Heat anticipator that is set too low will cause the heat source to cycle prematurely possibly never reaching set point A heat anticipator that is set too high will cause the heat source to cycle too late over shooting the set point The best method to obtain the required setting for the heat anticipator is to measure the actual current draw in the control circuit W using a low range 0 2 0 Amps Ammeter After measuring the current draw simply set the heat anticipator to match that val
39. ifferent size HP motors and or different diameter blower wheels are used in different models to obtain the required airflow Indoor Blower Airflow The current Vert Pak 9 12 amp 18 use a dual shaft permanent split capacitor single speed motor to drive indoor blower and outdoor fan Earlier model VERT I Pak units used 2 speed motors The Vert I Pak 24 uses an individual single shaft permanent split capacitor single speed motor for the indoor blower and a separate motor drives the outdoor fan Different size HP motors and or different diameter blower wheels are used in different models to obtain the required airflow Condenser Fan Motors The current Vert I Pak 9 12 amp 18 units use dual shaft permanent split capacitor single speed motor to drive indoor and outdoor fan Earlier models used a 2 speed motor The Vert l Pak 24 uses and individual single shaft permanent split capacitor single speed motor for the outdoor fan with a separate motor driving the indoor blower Blower Wheel Inspection Visually inspect the blower wheel for the accumulations of dirt or lint since they can cause reduced airflow Clean the blower wheel of these accumulations If accumulation cannot be removed it will be necessary to remove the blower assembly from the unit for proper wheel cleaning Cooling A nominal 400 350 450 allowable CFM per ton of airflow is required to insure proper system operation capacity and efficiency F
40. ion is made before connecting line voltage All electrical connections and wiring MUST be installed by a qualified electrician and conform to the National Electrical Code and all local codes which have jurisdiction Failure to do so can result in property damage personal injury and or death Supply Circuit The system cannot be expected to operate correctly unless the system is properly connected wired to an adequately sized single branch circuit Check the installation manual and or technical data for your particular unit and or strip heaters to determine if the circuit is adequately sized Electrical Rating Tables NOTE Use copper conductors ONLY Wire sizes are per NEC Check local codes for overseas applications A through D Suffix Units Only 250 V Receptacles and Fuse Types RECEPTACLE MANUFACTURER Hubbell P amp S GE Arrow Hart TIME DELAY TYPE FUSE or HACR circuit breaker HACR Heating Air Conditioning Refrigeration May be used for 15 Amp applications if fused for 15 Amp Recommended branch circuit wire sizes Nameplate maximum circuit 5 AWG Wire size breaker size 15A 20A 30A AWG American Wire Gauge Single circuit from main box Based on copper wire single insulated conductor at 60 Supply Voltage To insure proper operation supply voltage to the system should be within five 5 percent plus or minus of listed rating plate voltage Control Low Voltage To insure
41. l the larger area and lower pressure allows the refrigerant to expand and lower its temperature heat intensity This expansion is often referred to as boiling Since the unit s blower is moving Indoor air across the finned surface of the evaporator coil the expanding refrigerant absorbs some of that heat This results in a lowering of the indoor air temperature hence the cooling effect The expansion and absorbing of heat cause the liquid refrigerant to evaporate i e change to a gas Once the refrigerant has been evaporated changed to a gas it is heated even further by the air that continues to flow across the evaporator coil The particular system design determines at exactly what point in the evaporator the change of state i e liquid to a gas takes place In all cases however the refrigerant must be totally evaporated changed to a gas before leaving the evaporator coil The low pressure suction created by the compressor causes the the refrigerantto leave the evaporator through the suction line as a COOL low pressure vapor The refrigerant then returns to the compressor where the cycle is repeated Refrigeration Assembly Compressor Evaporator Coil Assembly Condenser Coil Assembly Capillary Tube Compressor Overload Electrical Supply WARNING Electrical shock hazard Turn OFF electric power at fuse box or service panel before making any electrical connections and ensure a proper ground connect
42. mperature Procedure For Changing Reversing Valve 1 Install Process Tubes Recover refrigerant from sealed system PROPER HANDLING OF RECOVERED REFRIGERANT ACCORDING TO EPAREGULATIONS IS REQUIRED 2 Remove solenoid coil from reversing valve If coil is to be reused protect from heat while changing valve 3 Unbraze all lines from reversing valve 4 Clean all excess braze from all tubing so that they will slip into fittings on new valve 5 Remove solenoid coil from new valve 6 Protect new valve body from heat while brazing with plastic heat sink ThermoTrap or wrap valve body with wet rag 20 FROM OUTDOOR COL TO COMPRESSOR SUCTION TO INDOOR COIL 7 gt a HOT BOTH THE SAME TEMPERATURE COOL BOTH THE SAME TEMPERATURE Reversing Valve in Heating Mode TO OUTDOOR COIL TO COMPRESSOR SUCTION BOTH THE SAME TEMPERATURE Reversing Valve in Cooling Mode Fit all lines into new valve and braze lines into new valve Pressurize sealed system with a combination of R 22 and nitrogen and check for leaks using a suitable leak detector Recover refrigerant per EPA guidelines Once the sealed system is leak free install solenoid coil on new valve and charge the sealed system by weighing in the proper amount and type of refrigerant as shown on rating plate Crimp the process tubes and solder the ends shut Do not leave schrader or piercing valves in the sealed system DANGER BODILY INJURY OR DEA
43. nals of Blower Relay Control Wiring and or Room Thermostat Problem indicated in Control wiring and or Yes Room Thermostat Line Voltage Problems indicated available at fan in Blower Relay speed switch No on models so equipped Yes Fan Motor operates Compressor and fan but Compressor motor should now doesn t No operate Is Line Voltage present Spocd Switch at Motor Leads No on models so equipped Supply Circuit Yes or Blower Relay on later problems loose Is Locked Rotor See Refrigerant models Connections or bad voltage d Circuit Diagnosis if Relays No 015 unit still is not cooling Check C itor i 15 Replace Capacitor Capacitor Good No Replace Capacitor Are Capacitor and if and or Start Assist so equipped Sta Yes Device No Assist good Possible motor Motor should run problem indicated No thoroughly Allow ample time Have System for pressures to Pressures Equalized equalize No Yes Possible Compressor problem indicated Compressor should See Compressor No run hecks 39 2 TON ELECTRICAL TROUBLESHOOTING CHART Cooling Compressor and outdoor Indoor blower runs but fan motor run but indoor outdoor fan motor and blower does not run compressor do not run Yes Turn Fan Switch of Room Thermostat to On position or jump to G at Terminal board Does indoor blower now operate No 24Volts at Coil Yes Terminals of Blower Relay
44. nches W C with a wet indoor coil with filter installed problems The refrigerant circuit diagnosis chart will assist you in properly diagnosing these systems An overcharged unit will at times return liquid refrigerant slugging back to the suction side of the compressor eventually causing a mechanical failure within the compressor This mechanical failure can manifest itself as valve failure bearing failure and or other mechanical failure The specific type of failure will be influenced by the amount of liquid being returned and the length of time the slugging continues Not enough refrigerant Undercharge on the other hand will cause the temperature of the suction gas to increase to the point where it does not provide sufficient cooling for the compressor motor When this occurs the motor winding temperature will increase causing the motor to overheat and possibly cycle open the compressor overload protector Continued overheating of the motor windings and or cycling of the overload will eventually lead to compressor motor or overload failure Method Charging The acceptable method for charging the Vert I Pak system is the Weighed in Charge Method The weighed in charge method is applicable to all units It is the preferred method to use as it is the most accurate The weighed in method should always be used whenever a charge is removed from a unit such as for a leak repair compressor replacement or when
45. njury or property damage which may result to you or others Friedrich Air Conditioning Company will not be responsible for any injury or property damage arising from improper installation service and or service procedures Model Identification Guide MODEL NUMBER SERIES f ENGINEERING CODE V Vertical Series E Cooling with or without electric heat OPTIONS H Heat Pump RT Standard Remote Operation DESIGN SERIES SP Seacoast Protected A 32 and 47 Cabinet NOMINAL CAPACITY ELECTRIC HEATER SIZE A Series Btu h A Series 09 9 000 00 No electric heat 12 12 000 25 2 5 KW 18 18 000 34 3 4 KW 24 24 000 50 5 0 KW VOLTAGE und K 208 230V 1Ph 60Hz Serial Number Identification Guide SERIAL NUMBER 00001 Decade Manufactured J29 K Not Used PRODUCTION RUN NUMBER PRODUCT LINE YEAR MANUFACTURED SPLIT 0002 Hon H H N MONTH MANUFACTURED A Jan D Apr G Jul K Oct Feb L Nov F Jun 4 Sep Dec VERT I PAK H SUFFIX CHASSIS SPECIFICATIONS VEA VHA9K 24K VEAO9K VEA12K VEA18K VEA24K 09 12 18 24 COOLING DATA Cooling Btu h 9500 9300 11800 11500 18000 17800 9500 9300 11800 11500 18000 17800 Cooling Power W 880 1093 2070 905 1124 2070 EER 10 8 10 8 8 7 10 5 10 5 8 7 Sensible Heat Rati
46. o HEAT PUMP DAT Heating Btu h 0 74 A 0 72 0 70 0 74 8500 8300 0 72 10600 10400 0 70 15700 15500 47 F 3 0 3 2 3 0 Heating Power W 830 971 1705 Heating Current A ELECTRICAL D Voltage 1 Phase 60 Hz 230 208 230 208 230 208 230 208 4 4 4 9 230 208 5 5 6 1 230 208 9 2 10 2 230 208 230 208 Volt Range 253 198 253 198 253 198 253 198 253 198 253 198 253 198 253 198 Cooling Current A 4 1 4 3 4 9 5 3 9 2 10 2 11 2 12 4 42 44 5 0 5 5 9 2 10 2 11 2 124 Amps L R 21 21 47 68 21 21 47 68 Amps F L 3 7 45 79 10 2 37 45 7 9 10 2 Indoor Motor HP 14 14 14 14 14 14 14 14 Indoor Motor 1 2 1 2 14 2 1 2 1 2 14 2 Outdoor Motor HP N A N A N A 114 114 Outdoor Motor N A N A N A 2 N A N A N A 2 AIRFLOW DATA Indoor CFM 300 350 550 150 300 375 550 150 Vent 60 60 60 80 60 60 60 80 Max ESP Dimensions W x D x H 3 3 3 3 3 PHYSICAL DAT 23x23x32 23x23x32 23x23x32 23 x 23x 47 23x 23 x 32 23 x 23 x 32 23 x 23 x 32 23x23x47 Net Weight Lbs 114 124 144 167 114 125 144 167
47. on This service manual is designed to be used in conjunction with the installation manuals provided with each air conditioning system component Air conditioning systems consist of BOTH an evaporator indoor section and a condenser outdoor section in one closed system and a room thermostat When so equipped accessories such as electric strip heaters are also considered part of the system This service manual was written to assist the professional HVAC service technician to quickly and accurately diagnose and repair any malfunctions of this product This manual therefore will deal with all subjects in a general nature i e All text will pertain to all models IMPORTANT It will be necessary for you to accurately identify the unit you are servicing so you can be certain of a proper diagnosis and repair See Unit Identification WARNING The information contained in this manual is intended for use by a qualified service technician who is familiar with the safety procedures required in installation and repair and who is equipped with the proper tools and test instruments Installation or repairs made by unqualified persons can result in hazards subjecting the unqualified person making such repairs to the risk of injury or electrical shock which can be serious or even fatal not only to them but also to persons being served by the equipment If you install or perform service on equipment you must assume responsibility for any bodily i
48. proper system operation the transformer secondary output must be maintained at a nominal 24 volts The control low voltage transformer is equipped with multiple primary voltage taps Connecting the primary supply wire to the tap i e 208 and 240 volts that most closely matches the MEASURED supply voltage will insure proper transformer secondary output is maintained Supply Voltage Supply voltage to the unit should be a nominal 208 230 volts It must be between 197 volts and 253 volts Supply voltage to the unit should be checked WITH THE UNIT IN OPERATION Voltage readings outside the specified range can be expected to cause operating problems Their cause MUST be investigated and corrected Electrical Ground GROUNDING OF THE ELECTRICAL SUPPLY TO ALL UNITS IS REQUIRED for safety reasons Electrical Requirements NOTE All field wiring must comply with NEC and local codes It is the responsibility of the installer to insure that the electrical codes met Wire Size Use ONLY wiring size recommended for single outlet branch circuit Fuse Circuit Use ONLY type and size fuse or HACR circuit breaker Indicated on unit s rating plate See sample on page 6 Proper current protection to the unit is the responsibility of the owner Unit MUST be grounded from branch circuit to unit or through separate ground wire provided on permanently connected units Be sure that branch circuit or general purpose outlet is groun
49. rload which senses both motor amperage and winding temperature High motor temperature or amperage heats the overload causing it to open breaking the common circuit within the compressor Heat generated within the compressor shell usually due to recycling of the motor is slow to dissipate It may take anywhere from a few minutes to several hours for the overload to reset Checking the Internal Overload A reading of infinity between any two terminals MAY indicate an open winding If however a reading of infinity is obtained between C amp R and C amp S accompanied by a resistance reading between S amp R an open internal overload is indicated Should you obtain this indication allow the compressor to cool May take up to 24 hours then recheck before condemning the compressor If an open internal overload is indicated the source of its opening must be determined and corrected Failure to do so will cause repeat problems with an open overload and or premature compressor failure Some possible causes of an open internal overload include insufficient refrigerant charge restriction in the refrigerant circuit and excessive current draw 21 Single Phase Resistance Test Remove the leads from the compressor terminals and set the ohmmeter on the lowest scale x 1 Touch the leads of the ohmmeter from terminals common to start C to S Next touch the leads of the ohmmeter from terminals common to run C to R
50. rounded and must be replaced 5 tests okay reconnect the electrical leads 6 Make sure coil has been assembled correctly Checking Reversing Valve NOTE You must have normal operating pressures before the reversing valve can shift Check for proper refrigerant charge Sluggish or sticky reversing valves can sometimes be remedied by reversing the valve several time with the airflow restricted to increase system pressure To raise head pressure during the cooling season the airflow through the outdoor coil can be restricted During heating the indoor air can be restricted by blocking the return air Dented or damaged valve body or capillary tubes can prevent the main slide in the valve body from shifting If you determine this is the problem replace the reversing valve After all of the previous inspections and checks have been made and determined correct then perform the Touch Test on the reversing valve CAUTION Never energize the coil when it is removed from the valve as a coil burnout will result Touch Test in Heating Cooling Cycle The only definite indications that the slide is in the mid po sition is if all three tubes on the suction side of the valve are hot after a few minutes of running time NOTE A condition other than those illustrated above and on page 19 indicate that the reversing valve is not shifting properly Both tubes shown as hot or cool must be the same corresponding te
51. rriedrich Service Manual ERT I PAK SERIES Single Package Vertical Air Conditioning System A Suffix Models MODELS V E H A09K25 V E H A12K25 V E H A18K25 V E H A24K25 24 75 VPSERVMN 4 05 09 34 12 34 18 34 24 34 24 10 V E H A09K50 V E H A12K50 V E H A18K25 V E H A24K50 24 00 Digits vary with model Table of Contents augere 3 Vert I Pak Model Number Identification Guide 4 Serial Number Identification Guide 4 Suffix Chassis Specifications 5 E and Suffix Chassis Specifications 6 A and D Suffix Chassis Specifications 7 Sequence Of 8 Electrical Supply iti hee 9 Supply CIRCUIT eiers errori i iecit 9 Supply 9 Control Low 2 9 Supply Voltage s eene 9 Electncal Gro nd iure 9 Electrical Rating Tables 9 Electrical Requirements 9 Room uu u uu u u uu u u uuu u u uu uQ 10 Thermostat
52. s Equalized No Yes Compressor should No run Primary No Secondary No Cool Relay No Check Supply Circuit for loose connections No or broken wiring Problems indicated with Control Transformer Check H P Switch is so equipped No Check Supply Circuit for loose connections or broken wiring Problems indicated with Room Thermostat or Control Wiring Compressor and outdoor fan motor should now operate Yes See Refrigerant Circuit Diagnosis if unit still is not cooling properly TROUBLESHOOTING CHART COOLING REFRIGERANT SYSTEM DIAGNOSIS COOLING High Suction Pressure Low Head Pressure High Head Pressure Low Load Conditions High Load Conditions Low Load Conditions High Load Conditions Low Air Flow Across High Air Flow Across Refrigerant System Low Air Flow Across Indoor Coil Indoor Coil Restriction Outdoor Coil Refrigerant System Reversing Valve not Reversing Valve not Overcharged Fully Seated Fully Seated 5 Non Condensables air Undercharged Overcharged Undercharged Defective Compressor Defective Compressor TROUBLESHOOTING CHART HEATING REFRIGERANT SYSTEM DIAGNOSIS HEATING High Suction Pressure Low Head Pressure High Head Pressure Low Air Flow Across Outdoor Ambient Too High Refrigerant System Outdoor Ambient Too High Outdoor Coil for Operation in Heating Restriction For Operation In Heating Refrigerant System Reversing Valve not Reversing Valve not Low Air Flo
53. small capillary tubes to the main valve to cause it to shift NOTE System operating pressures must be near normal before valve can shift DANGER OF BODILY INJURY OR DEATH FROM ELECTRICAL SHOCK The reversing valve solenoid is connected to high voltage Turn off electrical power before disconnecting connecting high voltage wiring or servicing valve 3 Switch the unit to the heating mode and observe the gauge readings after a few minutes running time If the system pressure is lower than normal the heating capillary is restricted 4 f the operating pressures are lower than normal in both the heating and cooling mode the cooling capillary is restricted PILOT SOLENOID VALVE FROM VALVE DISCHARGE 4 WAY REVERSING VALVE Electrical Circuit and Coil Reversing valve coil is energized in the heating cycle only 1 Set controls for heating valve should shift 2 Check for line voltage at the heat relay terminal 2 and L2 at the quick disconnect If line voltage is not present check the power supply Testing Coil 1 Turn off high voltage electrical power to unit 2 Unplug line voltage lead from reversing valve coil 3 Check for electrical continuity through the coil If you do not have continuity replace the coil 4 Checkfrom each lead of coil to the copper liquid line as itleaves the unit or the ground lug There should be no continuity between either of the coil leads and ground if there is coil is g
54. ue If a low range ammeter is not available a Clamp on type ammeter may be used as follows 1 Wrap EXACTLY ten 10 turns of wire around the jaws of a clamp on type ammeter 2 Connect one end of the wire to the W terminal of the thermostat sub base and the other to the R terminal 3 Turn power on and wait approximately 1 minute then read meter 4 Divide meter reading by 10 to obtain correct anticipator setting Electronic thermostats do not use a resistance type anticipator These thermostats use a microprocessor computer that determines a cycle rate based on a program loaded into it at the factory Typical Electrical amp Thermostat Wiring Diagrams VEA VHA 24K FOR 208 VOLT MODELS ONLY MOVE THE WHITE WIRE AS SHOWN BELOW THERMOSTAT FRONT COM 208V 240V THERMOSTAT CONNECTIONS TRANSFORMER EAR 7 5KW amp 10KW ITE 17 22 REV VALVE HEAT HEAT HEAT HEAT RELAY RELAY 7 5KW tOKW 5KW B 2 6 4 1 3 2REQD GREEN CAPACITOR 1 MN mue iiem coNpENSER NG um pron L QOS 01 NOTE THE DIAGRAM ABOVE ILLUSTRATES THE TYPICAL THERMOSTAT WIRING AND 208 VOLT TRANSFORMER WIRING SEE THE UNIT CONTROL PANEL FOR THE ACTUAL UNIT WIRING DIAGRAM AND SCHEMATIC 11 Typical Electrical amp Thermostat Wiring Diagrams G amp H Suffix
55. units are equipped with capillary tube metering devices Checking for restricted capillary tubes 1 Connect pressure gauges to unit 2 Start the unit in the cooling mode If after a few minutes of operation the pressures are normal the check valve and the cooling capillary are not restricted Reversing Valve Description Operation The Reversing Valve controls the direction of refrigerant flow to the indoor and outdoor coils It consists of a pressure operated main valve and a pilot valve actuated by a solenoid plunger The solenoid is energized during the heating cycle only The reversing valves used in the system is a 2 position 4 way valve The single tube on one side of the main valve body is the high pressure inlet to the valve from the compressor The center tube on the opposite side is connected to the low pressure suction side of the system The other two are connected to the indoor and outdoor coils Small capillary tubes connect each end of the main valve cylinder to the A and B ports of the pilot valve A third capillary is a common return line from these ports to the suction tube on the main valve body Four way reversing valves also have a capillary tube from the compressor discharge tube to the pilot valve The piston assembly in the main valve can only be shifted by the pressure differential between the high and low sides of the system The pilot section of the valve opens and closes ports for the
56. w Across Restriction Fully Seated Fully Seated Indoor Coil Undercharged Overcharged Undercharged Overcharged Defective Compressor Defective Compressor eir 41 42 ELECTRICAL TROUBLESHOOTING CHART HEAT PUMP HEAT PUMP SYSTEM COOLS WHEN HEATING IS DESIRED Is Line Voltage Present at Solenoid Valve Is Selector Switch set for Heat Is the Solenoid Coil Good Replace Solenoid Coil oil Good Reversing Valve Stuck Replace Reversing Valve 43 Use Factory Certified Parts rriedrich FRIEDRICH AIR CONDITIONING CO Post Office Box 1540 San Antonio Texas 78295 1540 4200 Pan Am Expressway San Antonio Texas 78218 5212 210 357 4400 FAX 210 357 4480 www friedrich com Printed in the U S A VPSERVMN 4 05
57. w installation or before a change out compressor replacement or in the case of heat strip failure to insure that the failure was not caused by improper airflow Checking External Static Pressure The airflow through the unit can be determined by measuring the external static pressure of the system and consulting the blower performance data for the specific VERT I PAK 1 Set up to measure external static pressure at the supply and return air 2 Drill holes in the supply duct for pressure taps pilot tubes or other accurate pressure sensing devices 3 Connect these taps to a level inclined manometer or Magnehelic gauges 4 Ensure the coil and filter are clean and that all the registers are open 5 Determine the external static pressure with the blower operating 6 Refer to the Air Flow Data for your VERT I PAK system to find the actual airflow for factory selected fan speeds 7 fthe actual airflow is either too high or too low the blower speed will need to be changed 8 Select a speed which most closely provides the required airflow for the system 9 Recheck the external static pressure with the new speed External static pressure and actual airflow will have changed to a higher or lower value depending upon speed selected Recheck the actual airflow at this new static pressure to confirm speed selection 10 Repeat steps 8 9 if necessary until proper airflow has been obtained EXAMPLE Air
58. xit of the metering device into the evaporator an intermittent hissing and gurgling sound indicates a low refrigerant charge Intermittent frosting and thawing of the evaporator is another indication of a low charge however frosting and thawing can also be caused by insufficient air over the evaporator Checks for an undercharged system can be made at the compressor If the compressor seems quieter than normal Reversing Valve Accumulator ma Lower Compressor Running Quieter than Normal Amps Lower Compressor Outdoor Indoor Coil Coil Undercharged System itis an indication of a low refrigerant charge A check of the amperage drawn by the compressor motor should show a lower reading Check the Unit Specification After the unit has run 10 to 15 minutes check the gauge pressures Gauges connected to system with an undercharge will have low head pressures and substantially low suction pressures Overcharged Refrigerant Systems Compressor amps will be near normal or higher Noncondensables can also cause these symptoms To confirm remove some of the charge if conditions improve system may be overcharged If conditions don t improve Noncondensables are indicated Whenever an overcharged system is indicated always make sure that the problem is not caused by air flow problems Improper air flow over the evaporator coil may indic
59. y The Defrost Thermostat will determine whether the unit should run in Heat Pump or Electric Heat based on the outdoor temperature See Defrost Thermostat page 24 External Static Pressure External Static Pressure can best be defined as the pressure difference drop between the Positive Pressure discharge and the Negative Pressure intake sides of the blower External Static Pressure is developed by the blower as a result of resistance to airflow Friction in the air distribution system EXTERNAL to the VERT I PAK cabinet Resistance applied externally to the VERT I PAK i e duct work coils filters etc on either the supply or return side of the system causes an INCREASE in External Static Pressure accompanied by a REDUCTION in airflow External Static Pressure is affected by two 2 factors 1 Resistance to Airflow as already explained 2 Blower Speed Changing to a higher or lower blower speed will raise or lower the External Static Pressure accordingly These affects must be understood and taken into consideration when checking External Static Pressure Airflow to insure that the system is operating within design conditions Operating a system with insufficient or excessive airflow can cause a variety of different operating problems Among these are reduced capacity freezing evaporator coils premature compressor and or heating component failures etc System airflow should always be verified upon completion of a ne
Download Pdf Manuals
Related Search