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Maritime Geothermal TF-45, Installation And Service Manual

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Maritime Geothermal TF-45 Installation And Service Manual Download Page 77

1-Jul-2017 

Page   77 

001223MAN-05 

 

Electrical Box Layout (208-3-60) 

Summary of Contents for TF-45

Page 1: ...d P O Box 2555 170 Plantation Road Petitcodiac NB E4Z 6H4 506 756 8135 TF Series Triple Function Geothermal Heat Pump Two Stage R410a Model Sizes 45 80 info nordicghp com www nordicghp com 001223MAN 05 ECO 000250 1 Jul 2017 Installation and Service Manual ...

Page 2: ...rformed CAUTION Venting refrigerant to atmosphere is illegal A proper refrigerant recovery system must be employed whenever repairs require removal of refrigerant from the heat pump SAFETY PRECAUTIONS Model Nomenclature Series TF Active Cooling Liquid to Air Liquid To Water Nominal Size 45 3 Ton 55 4 Ton 65 5 Ton 75 6 Ton 80 6 5 Ton Functions H Heating AC Active Cooling W Domestic Hot Water Refrig...

Page 3: ...F 15 2 T 15 4 T 15 6 T 15 7 T 15 65 HACW P 1 T C Y Z C Y Z SDELF SDERF 15 2 T 15 4 T 15 6 T 15 7 T 15 75 HACW P 1 T C Y Z C Y Z SDELF SDERF 15 2 T 15 4 T 15 6 S 15 7 T 15 80 HACW P 1 S C Y Z C Y Z SDELF SDERF 15 2 S 15 4 S 15 7 S 15 This manual applies only to the models and revisions listed in this table Maritime Geothermal Ltd has a continuous improvement policy and reserves the right to modify ...

Page 4: ...tor Pump Module Installation 32 001823CDG Dual Flow Pump Module Installation 33 000629PDG Pump Module Inst 2 Units on 1 Loop 34 Open Loop Installations 35 Well Water Temperature 35 Well Water Flow 35 Well Water Quality 35 Water Discharge Methods 35 Water Valve 36 Water Flow Control 36 Table of Contents Submersible Pump Selection 37 Stage 1 vs 2 on Open Loop 37 Plumbing the Heat Pump 37 Pipe Insula...

Page 5: ...enum Heater Electrical Information 208 230 1 60 73 001827CDG Typical Thermostat Connections 12 001224CDG TF Series Two Stage Aquastat Connection Diagram 13 000344CDG Typical Heating Only Zone Wiring 14 001901PDG Wiring For Best Cooling Mode Dehumidification 15 000970PDG Single Unit Connection to DHW Pre Heat Tank 16 001915INF Internal Plenum Heater Installation 19 002222PDG Typical Duct and Conden...

Page 6: ... concrete floor and deaden any compressor noise emitted from the bottom of the cabinet The heat pump comes equipped with an air filter rack which can be installed with the removable end where the filter is in serted on either side to facilitate changing the filter Electrical Connections The heat pump has a concentric 1 093 0 875 knockout for power supply connection to the electrical box There are ...

Page 7: ...nect to C or I in plenum heater 1 Plenum Heater dry contact Connect to 1 and 2 in plenum heater Connect AR1 to AR2 with a dry contact to reduce the air flow by 15 Refer to the Fan Blower Motor sub section for more information Aquastat Requirements The heat pump requires a two stage aquastat for hydronic operation A two stage aquastat can be purchased with the unit or other system controllers with ...

Page 8: ...all for both stage 1 air and stage 1 hydronic the unit operates in air mode in stage 2 If there is a call for both stage 2 air and stage 1 hydronic the unit operates in air mode in stage 2 If there is a call for both stage 1 air and stage 2 hydronic the unit operates in air mode in stage 2 If there is a call for both stage 2 air and stage 2 hydronic the unit operates in air mode in stage 2 HYDRONI...

Page 9: ... air chamber that hold the bottom of the blower to the brackets and the 4 screws in a line on the top of the unit that hold the blower panel in place Slide the blower in its panel away from the air coil and lift the air coil end of the panel Pull the blower assembly out through the top of the cabinet and set it on the floor 6 Disconnect the plenum heater extension from the blower housing and from ...

Page 10: ...ergize the ALR pin The LED will flash the fault code until the control board is reset by powering down the unit The board has a TEST jumper described on the Trouble shooting Guide page later in this manual WARNING If the control board enters perma nent lockout mode there is a serious problem with the system and it must be rectified if the unit is to maintain good service WARNING REPEATED RESETS OF...

Page 11: ...M HEATER FORK TERMINALS FOR TSTAT WIRE CONDENSATE PUMP HOSE IF REQUIRED 2 STYROFOAM INSUL IF PAD NOT PURCHASED Sample Bill of Materials Open Loop Installations Although not exhaustive following is a list of materials needed for a typical open loop groundwater installation FROM MARITIME GEOTHERMAL TF SERIES HEAT PUMP L OR R RETURN PLENUM HEATER __kW BUFFER TANK WITH __kW ELEMENTS AQUASTAT THERMOSTA...

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Page 17: ...ter is not close to this temperature it will be necessary to consult the more detailed performance tables later in the section for heat pump output at a different ELT In cooling dominant climates the heat pump should be similarly sized using the Ground Loop Cooling or Ground Water Cooling Standard Capacity Ratings Note that the triple function nature of the heat pump has no effect on sizing proced...

Page 18: ...ary heat source As such it will provide additional heat on ex tremely cold days if the heat pump is unable to bring the home temperature up quickly enough eliminating any discomfort to the homeowner This is particularly important if the heat pump is intentionally sized to less than 100 of the calculated heat load The second function of the plenum heater is to provide emergency heat should a heat p...

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Page 21: ...x 17 16 5 x 16 5 22 944 2250 20 10 x 38 12 x 30 14 x 26 16 x 22 18 x 19 18 5 x 18 5 22 1062 2600 20 10 x 38 12 x 30 14 x 26 16 x 22 18 x 19 18 5 x 18 5 24 1227 2900 22 12 x 36 14 x 30 16 x 26 18 x 23 20 x 20 24 1369 3400 22 12 x 36 14 x 30 16 x 26 18 x 23 20 x 20 26 1605 3600 24 14 x 38 16 x 32 18 x 28 20 x 25 22 x 22 26 1699 4300 24 14 x 38 16 x 32 18 x 28 20 x 25 22 x 22 28 2029 5250 26 16 x 38 ...

Page 22: ...or terminal strip in the electrical box of the unit The circulator is only powered when in hydronic heating mode and the compressor is operating The following documents 002238PDG 001046PDG and 001981PDG show typical piping configurations for a single unit with a buffer tank These depict a typical installation where there may be one or several in floor zones or perhaps fan coils Possible zone types...

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Page 28: ... pump module that can deliver the flow required for the unit at the calculated total pressure drop should be selected Refer to the Model Specific Information section for unit flow re quirements Loop pressure drops can be calculated using software such as those mentioned in the Horizontal Ground loops section or can be calculated in a spreadsheet using the pipe manufactur er s pressure drop tables ...

Page 29: ...3 8 thick closed cell pipe insulation to prevent condensa tion and dripping onto floors or walls Although many different antifreeze solutions have been employed in geothermal systems the alcohols such as methanol or ethanol have the most desirable characteristics for groundloop applications The overall heat transfer characteristics of these fluids remain high although care must be taken when handl...

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Page 35: ...se of an open loop system should be reconsid ered Water Discharge Methods Water disposal methods vary from area to area However some consideration should be made to prevent the cooled discharge water from immediately coming in contact with the supply source Attempting to return the water to the source well will eventually cool the water so much that the heat pump will shut off on its low pressure ...

Page 36: ...s recommended that the surface of the pond be lower than the installation location of the heat pump This reduces the back pressure generated by the weight of the water in the pond Water Valve Water flow through the heat pump is turned on and off by a water valve which is controlled by a 24VAC signal from the heat pump It should be installed on the OUT pipe of the heat pump so that the heat exchang...

Page 37: ...enefit of running the heat pump on stage 1 In this case it is recommended to jumper Y1 and Y2 together at the heat pump terminal strip in order to satisfy the heating demand as quickly as possible and minimize run time For the same reason slightly oversizing the heat pump is acceptable on open loop applications although this will require higher water flow If Y1 and Y2 are jumpered together it is r...

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Page 41: ...available to the heat pump 2 Verify that the entire system has been flooded and all the air has been purged as much as possible Further purging may be required after the system has been operating for a while 3 Verify that the loop contains the proper mix of antifreeze for the intended application Record the type of antifreeze and the mixture value on the startup sheet circle Vol or Weight 4 Record...

Page 42: ...rown wire with the blue insulated terminal to the compressor contactor as shown in the electrical box diagram Turn the DHW Switch in the unit post on Turn the power to the unit on 7 Remove the electrical cover from the plenum heater Place a current clamp meter around one of the supply wires Turn on the power to the plenum heater Adjust the thermostat setpoint to 85 F 29 C Verify that the current d...

Page 43: ...onnections are correct and securely fastened Circuit breaker or fuse size and wire gauge for Heat Pump A Ga Circuit breaker or fuse size wire gauge and Plenum Heater size A Ga kW Low voltage connections are correct and securely fastened STARTUP DATA Preparation Voltage across L1 and L2 L1 and L3 L2 and L3 VAC Heating Mode Suction Pressure Discharge Pressure psi kPa 10 minutes Duct Return Duct Supp...

Page 44: ...ssor L1 C current black wire place meter between electrical box and compressor 4 Adjust the aquastat setpoint to the desired buffer tank temperature and let the unit run through a cycle Record the setpoint suction and discharge pressures when the unit shuts off 5 Proceed to Final Inspection if the desuperheater has already been tested during the Air Startup 6 Open a zone or zones and let the tank ...

Page 45: ...control installed in return line Domestic Hot All shut off valves are open Water Lines are full and purged Desuperheater pump wire is disconnected Electrical High voltage connections are correct and securely fastened Circuit breaker or fuse size and wire gauge for heat pump A Ga Circulator pump voltages Outdoor 1 Outdoor 2 Indoor 1 V V V Low voltage connections are correct and securely fastened ST...

Page 46: ... heat exchanger ports and flush the exchanger for several minutes STEP 7 Return the plumbing to its original configuration and open the IN and OUT valves Operate the system and check for improved performance COAXIAL HEAT EXCHANGER FLUSHING PROCEDURE GROUND LOOP STEP 1 Isolate the heat exchanger by placing the pump module valves in the exchanger flushing position STEP 2 Connect a compressed air and...

Page 47: ... that the display is present on the thermostat If it is not proceed to POWER SUPPLY TROUBLESHOOTING other wise proceed to STEP 2 STEP 2 Remove the door and electrical box cover and check to see if there is a fault code on the control board If there is record the fault code Turn the power off wait 10 seconds and turn the power back on Set the thermostat to call for heating or cooling depending on t...

Page 48: ...re is 24VAC across LPS on the control board and C of the terminal strip as well as HPS left terminal and C Replace high pressure control if volt age is present on one terminal but not the other Faulty control board 24VAC is present across LPS and C of the terminal strip as well as HPS left terminal and C but is not present across CC on the control board and C after 10 minutes Replace control board...

Page 49: ...sure compressor overload has had a chance to reset If compressor is hot this may take several hours Replace the compressor Burned out motor shorted windings Remove wires from compressor Re sistance between any two terminals is below the specified value Replace the compressor Motor shorted to ground Remove wires from compressor Check for infinite resistance between each ter minal and ground If any ...

Page 50: ...ng liquid temperature to see if it is less than 25F Increase the size of the ground loop Dirty or fouled coaxial heat exchanger more likely for open loop unlikely for ground loop Disconnect the water lines and check the inside of the pipes for scale deposits Backflush the coaxial exchanger with a calcium removing cleaning solution Return air too cold Measure return air temperature Should be above ...

Page 51: ...HOOTING AIR HEATING MODE Fault Possible Cause Verification Recommended Action High Suction Pressure may appear to not be pumping Leaking reversing valve Reversing valve is the same tempera ture on both ends of body common suc tion line is warm compressor is running hot Tap reversing valve and switch it back and forth between heating and cooling positions If this does not work replace reversing val...

Page 52: ...V all the way in and out a few times to loosen it Replace TXV if this does not work Low or no refrigerant charge Entering air temperature and airflow are good but suction is low Check static refrigeration pressure of the unit for a very low value Weigh refrigerant out and compare to charge listed on nameplate Locate the leak and repair it Spray 9 a sniffer and dye are com mon methods of locating a...

Page 53: ...d the following at the fan con trol signal harness insert probes in connector where wire is inserted do not unplug the connector Recirculation grey pin 15 Stage 1 yellow pin 6 Stage 2 yellow black pin14 Stage 3 violet pin 2 If proper signal isn t present re place Fan Control Signal Har ness If proper signal is present replace fan motor head Fan not operat ing or operating intermittently Fan Contro...

Page 54: ...VAC is not present across R and C Replace transformer No display on aquastat Transformer breaker tripped 230VAC is present across L1 and L3 of the compressor contactor but 24VAC is not present across R and C Push breaker back in If it trips again locate cause of short circuit and cor rect No Y2A signal to heat pump Incorrect aquastat setup Aquastat does not indicate S2 on the display Correct the s...

Page 55: ...it has been serviced in the field and incorrectly charged High sub cooling low delta T across air coil Remove 1 2lb of refrigerant at a time and verify that the discharge pres sure reduces Faulty 4 way condenser select valve or actuator Verify actuator rotates 90 degrees over 80 seconds when unit is switched from air heating to hydronic heating modes Replace valve or actuator if faulty Low Suction...

Page 56: ...ange only slightly from stat ic values when compressor is started Replace compressor TXV stuck open Adjusting the TXV does not affect the superheat or the suction pressure Low super heat and discharge pressure Adjust the TXV all the way in and out a few times to loosen it Replace TXV if this does not work Compressor frosting up See Low Suction Pressure in this section TXV frosting up TXV stuck alm...

Page 57: ...d Or thermostat indicates auxiliary or emer gency but no 24VAC signal present across C and the auxiliary and or emer gency pin at the thermostat Replace thermostat Faulty thermostat wiring 24VAC signal is present across C and the auxiliary and or emergency pin at the thermostat but no 24VAC signal is pre sent across W2 and C at the heat pump terminal strip Correct wiring No 24VAC signal from C to ...

Page 58: ...Check voltage at elements with multimeter Push reset button DHW switch is turned off Inspect switch located on heat pump cabinet post Turn switch on Blockage or restriction in the water line or hot water heat exchanger Check water flow and power to pump Check water lines for obstructions Remove obstruction in water lines Acid treat the domestic hot water coil Faulty DHW cutout failed open Check co...

Page 59: ...n circuit is ready for vacuuming STEP 2 Release the refrigerant circuit pressure and connect the vacuum pump to the charging manifold Start the vacuum pump and open the charging manifold valves Vacuum until the vacuum gauge remains at less than 500 microns for at least 1 minute with the vacuum pump valve closed STEP 3 Close the charging manifold valves then shut off and disconnect the vacuum pump ...

Page 60: ...0 991 4 465 57 200 16 8 3 75 TF 80 6 5 17 0 1 07 5 9 40 8 Stage 1 2400 1133 5 155 61 900 18 1 3 52 Table 20 Standard Capacity Ratings Ground Water Heating 60Hz EAT 68 F 20 C ELT 50 F 10 C Model Nominal Size Liquid Flow Pressure Drop Mode Airflow Input Energy Capacity COPH tons gpm L s psi kPa cfm L s Watts Btu hr kW W W TF 45 3 10 0 0 63 4 9 34 1 Stage 1 1030 486 1 500 26 900 7 9 5 26 Stage 2 1200...

Page 61: ...897 2 950 66 700 19 5 6 63 22 6 TF 75 6 16 0 1 01 4 9 33 6 Stage 1 1660 783 2 485 61 100 17 9 7 21 24 6 Stage 2 2100 991 3 875 76 600 22 2 5 79 19 8 TF 80 6 5 17 0 1 07 4 9 33 6 Stage 1 2400 1133 4 350 84 100 24 6 5 66 19 3 Table 23 Standard Capacity Ratings Ground Loop Hydronic Heating 60Hz EWT 104 F 40 C 15 NaCl by Weight Ground Loop Fluid STAGE 1 ELT 41 F 5 C STAGE 2 ELT 32 F 0 C Model Nominal ...

Page 62: ...0 5 0 3 2 15 0 8 2 5 8 5 7 3 5 16 0 6 3 6 5 4 0 TF 75 ΔP psi 0 7 0 9 1 3 1 6 1 9 2 3 2 6 3 0 3 2 3 5 4 0 18 0 17 0 4 4 4 4 Table 26 Closed Loop Pressure Drop Data 15 Methanol 32 F FLOW gpm TF 25 ΔP psi TF 45 ΔP psi TF 55 ΔP psi TF 65 ΔP psi TF 80 ΔP psi 4 0 0 9 1 0 5 0 1 4 1 4 6 0 1 9 2 0 1 3 1 3 0 9 7 0 2 4 2 5 1 6 1 8 1 0 8 0 3 0 3 0 2 1 2 2 1 3 9 0 3 9 3 8 2 4 2 7 1 6 10 0 4 8 4 7 3 1 3 3 2 1 1...

Page 63: ...a Indoor Loop Power Consumption Sink Data Outdoor Loop EAT Evap Temp Airflow LAT Delta T HAB Compressor Fan Effective Effi ciency ELT Cond Temp Flow LLT Delta T Rejection F F cfm F F Btu hr Watts Amps Watts Watts EER F F gpm F F Btu hr C C L s C C Watts COPc C C L s C C Watts 80 6 44 3 1 200 57 3 23 3 45 431 1 433 5 5 207 1 586 28 6 57 65 9 6 67 6 10 6 51 026 27 0 6 8 566 14 0 13 0 13 311 8 39 13 ...

Page 64: ... Data Indoor Loop Power Consumption Sink Data Outdoor Loop EAT Evap Temp Airflow LAT Delta T HAB Compressor Fan Effective Effi ciency ELT Cond Temp Flow LLT Delta T Rejection F F cfm F F Btu hr Watts Amps Watts Watts EER F F gpm F F Btu hr C C L s C C Watts COPc C C L s C C Watts 80 6 46 1 500 55 6 25 0 58 987 2 069 9 2 181 2 197 26 8 48 75 12 0 59 1 11 1 66 666 27 0 7 8 708 13 1 13 9 17 283 7 87 ...

Page 65: ...oor Loop Power Consumption Sink Data Outdoor Loop EAT Evap Temp Airflow LAT Delta T HAB Compressor Fan Effective Effi ciency ELT Cond Temp Flow LLT Delta T Rejection F F cfm F F Btu hr Watts Amps Watts Watts EER F F gpm F F Btu hr C C L s C C Watts COPc C C L s C C Watts 80 6 43 7 1 900 57 1 23 5 67 790 2 556 11 6 260 2 748 24 7 53 75 14 4 63 8 10 8 77 402 27 0 6 5 897 14 0 13 0 19 862 7 23 11 7 2...

Page 66: ...ta Indoor Loop Power Consumption Sink Data Outdoor Loop EAT Evap Temp Airflow LAT Delta T HAB Compressor Fan Effective Effi ciency ELT Cond Temp Flow LLT Delta T Rejection F F cfm F F Btu hr Watts Amps Watts Watts EER F F gpm F F Btu hr C C L s C C Watts COPc C C L s C C Watts 80 6 43 9 2 100 56 8 23 8 79 856 3 092 13 9 405 3 461 23 1 49 75 16 8 59 9 10 9 91 790 27 0 6 6 991 13 8 13 2 23 398 6 76 ...

Page 67: ...oor Loop Power Consumption Sink Data Outdoor Loop EAT Evap Temp Airflow LAT Delta T HAB Compressor Fan Effective Effi ciency ELT Cond Temp Flow LLT Delta T Rejection F F cfm F F Btu hr Watts Amps Watts Watts EER F F gpm F F Btu hr C C L s C C Watts COPc C C L s C C Watts 80 6 44 2 400 57 8 22 8 87 349 3 293 17 6 625 3 882 22 5 49 75 16 8 61 0 12 0 100 720 27 0 6 6 1 133 14 3 12 7 25 593 11 9 6 59 ...

Page 68: ...5 104 0 119 9 6 112 9 8 9 42 746 17 2 10 0 0 606 13 1 4 1 9 920 40 0 48 3 0 606 45 0 5 0 12 524 Compressor ZPS30K5E PFV Hydronic Heating Mode TF 55 HACW P 1T R410a 60 Hz Source Data Outdoor Loop Power Consumption Sink Data Indoor Loop ELT Evap Temp Flow LLT Delta T HAB Total Effective COPh EWT Cond Temp Flow LWT Delta T Net Output F F gpm F F Btu hr Watts Amps Watts W W F F gpm F F Btu hr C C L s ...

Page 69: ... 487 4 68 105 0 119 14 4 115 0 10 0 71 680 18 9 10 0 0 908 14 3 4 6 16 603 40 6 48 3 0 908 46 1 5 5 21 002 Compressor ZPS51K5E PFV Hydronic Heating Mode TF 75 HACW P 1T R410a 60 Hz Source Data Outdoor Loop Power Consumption Sink Data Indoor Loop ELT Evap Temp Flow LLT Delta T HAB Total Effective COPh EWT Cond Temp Flow LWT Delta T Net Output F F gpm F F Btu hr Watts Amps Watts W W F F gpm F F Btu ...

Page 70: ...6 194 32 1 6 437 2 83 104 0 126 16 8 111 4 7 4 62 270 3 3 3 9 1 060 0 5 2 8 11 943 18 0 40 0 52 2 1 060 44 1 4 1 18 245 44 0 30 16 8 38 2 5 8 46 150 6 070 31 8 6 313 3 12 104 0 126 16 8 112 0 8 0 67 235 6 7 1 1 1 060 3 5 3 2 13 522 17 9 40 0 52 2 1 060 44 5 4 5 19 700 49 0 35 16 8 42 6 6 4 51 148 6 028 31 9 6 256 3 38 104 0 127 16 8 112 6 8 6 72 087 9 4 1 7 1 060 5 9 3 6 14 986 17 9 40 0 52 8 1 06...

Page 71: ...72 850 401 75 1974 932 1678 792 1560 736 1326 626 1105 522 940 443 80 2256 1065 1918 905 N A N A N A N A 1263 596 1074 507 45 1128 532 959 453 968 457 823 388 632 298 537 253 Table 29 HIGH Airflow 6 STAGE 2 STAGE 1 FAN ONLY Recirculation Model Full AR1 AR2 reduction Full AR1 AR2 reduction Full AR1 AR2 reduction cfm L s cfm L s cfm L s cfm L s cfm L s cfm L s 25 848 400 721 340 721 340 613 289 475 ...

Page 72: ...necting 115VAC circulators to the unit Table 33 Heat Pump Electrical Information 460 3 60 Model Compressor Fan Circulators FLA MCA Max Fuse Breaker Wire Size RLA LRA RLA Max A Amps Amps Amps ga 45 5 7 38 3 5 10 0 11 4 15 14 4 55 6 4 41 4 0 11 2 12 8 20 12 4 65 7 2 52 5 5 13 5 15 3 20 12 4 75 8 5 66 6 5 15 8 17 9 30 10 4 80 10 6 75 7 0 18 4 21 1 30 10 4 Electrical Tables Table 34 Heat Pump Electric...

Page 73: ... kW MCA A Breaker A Wire Size 5 5 20 8 30 10 3 8 22 6 30 10 4 2 19 1 30 10 7 7 29 2 40 8 5 3 31 6 40 8 5 9 26 7 40 6 10 10 41 7 60 6 7 5 45 1 50 6 8 4 38 1 50 6 15 15 62 5 80 4 11 3 67 7 80 4 12 6 57 2 80 3 20 20 83 3 100 3 15 0 90 3 100 3 16 8 76 3 100 3 220 1 50 MCA A 26 0 36 5 52 1 78 1 104 2 FLA A 18 1 25 3 36 1 54 2 72 2 FLA A 19 1 26 7 38 1 57 2 76 3 Electrical Tables continued ...

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Page 85: ...1 Jul 2017 Page 85 001223MAN 05 Dimensions TF 45 Left Return ...

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Page 89: ...suse negligence abuse fire flood lightning unauthorized alteration misapplication contaminated or corrosive liquid or air supply operation at abnormal air or liquid temperatures or flow rates or opening of the refrigerant circuit by unqualified personnel 8 Mold fungus or bacteria damage 9 Corrosion or abrasion of the product 10 Products supplied by others 11 Products which have been operated in a ...

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