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7

Dual Fuel Systems

Indoor split units can be connected to fossil fuel furnaces that
include an A-coil or slab coil. Dual fuel installations utilize the
geothermal heat pump for heating until the point that auxiliary
heat is called for on the thermostat. At that point, the furnace will
be enabled and the heat pump will be disabled. The geothermal
heat pump provides air conditioning through the furnace’s
refrigerant coils.

Refer to the furnace manufacturer’s installation manual for
the furnace installation, wiring and coil insertion. A Dual Fuel
thermostat, a field-installed SPST relay or dual capacity
auxiliary heat relay is required. See Figure 2 for typical Dual
Fuel application.

Figure 2: Typical Split System Heat Pump Coil Add-On Fossil Fuel Furnace

In add-on indoor split applications, the coil should be located in
the supply side of the furnace to avoid condensation damage
to the furnace heat exchanger. A high temperature limit should
be installed upstream of the coil to de-energize the compressor
whenever the furnace is operating. Without this switch, the
indoor split will trip out on high pressure. A dual fuel thermostat
can remove the Y1 and Y2 calls when a W call is energized to
allow gas furnace backup on a indoor split application. Refer to
thermostat wiring diagram for details.

Wire To

Thermostat

Up-Flow

Fossil Fuel

Furnace

Condensate

Drain

(must be trapped)

"A" or

Slab Coil

Supply Duct

Air Temperature Limit Switch -
to prevent compressor operation
when entering air is greater than
90°F.

Return

Duct

Disconnect

Vibration Absorbing Pad or Air Pad

P/T Plugs

Water Out

Water In

Lineset To

Air

Handler

Insulated Suction Line

DHW In

DHW Out

Thermostat

Wire From

Air Handler

Maximum Recommended Distance

is 60' Between Units

General Installation Information cont.

AFFINITY INDOOR SPLIT SERIES INSTALLATION MANUAL

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Summary of Contents for YAZS022

Page 1: ...NAL TONS YAZT026 072 2 THRU 6 NOMINAL TONS Due to continuous product improvement specifications are subject to change without notice Visit us on the web at www york geothermal com Additional rating information can found at www ahridirectory org FOR DISTRIBUTION USE ONLY NOT TO BE USED AT POINT OF RETAIL SALE INSTALLATION MANUAL ...

Page 2: ......

Page 3: ...r Handler 20 Physical Data Air Handler 21 Model Nomenclature Coil 21 Refrigerant Coil Compatibility 21 The AuroraTM Control System 22 27 Reference Calculations 28 Legend 28 Wiring Schematics 29 30 Refrigeration 31 33 Line Set Sizes 33 Pressure Temperature Conversion Chart for R 410A 34 Unit Startup 35 37 Operating Parameters 38 39 Pressure Drop 40 Refrigerant Circuit Guideline 41 Thermistor Resist...

Page 4: ...8 049 060 064 070 072 Discharge Configuration A None Air Configuration A None Voltage 1 208 230 60 1 Hot Water Generation Option 0 No HWG No GeoStart 1 HWG with Factory Installed Pump No GeoStart 3 No HWG GeoStart 4 HWG with Factory Installed Pump GeoStart Vintage Factory Use Only Controls A AuroraTM Base Control Future Options 0 Standard Future Options A Standard Water Coax Option C Copper N Cupr...

Page 5: ...ified by the manufacturer s installation instructions however the following recommendations should be considered to minimize noise and service problems An air filter must always be installed upstream of the air coil on the return air side of the air handler or furnace If there is limited access to the filter rack for normal maintenance it is suggested that a return air filter grill be installed Be...

Page 6: ...e of operating with a minimum of 2 blower speeds Refer to the manufacturer s instructions for the blower coil unit for details on installing the air handling portion of the system All blower coil units air coils must be installed as specified by the manufacturer s installations instructions However the following recommendations should be considered to minimize noise and service problems An air fil...

Page 7: ...located in the supply side of the furnace to avoid condensation damage to the furnace heat exchanger A high temperature limit should be installed upstream of the coil to de energize the compressor whenever the furnace is operating Without this switch the indoor split will trip out on high pressure A dual fuel thermostat can remove the Y1 and Y2 calls when a W call is energized to allow gas furnace...

Page 8: ...ber seals are shipped attached to the waterline To make the connection to a ground loop system mate the brass connector supplied in CK4L connector kit against the rubber gasket in the swivel connector and thread the female locking ring onto the pipe threads while maintaining the brass connector in the desired direction Tighten the connectors by hand then gently snug the fitting with pliers to prov...

Page 9: ... 0 5 ppm Chlorides Less than 20 ppm Less than 125 ppm Less than 300 ppm Carbon Dioxide Less than 50 ppm 10 50 ppm 10 50 ppm Ammonia Less than 2 ppm Less than 2 ppm Less than 20 ppm Ammonia Chloride Less than 0 5 ppm Less than 0 5 ppm Less than 0 5 ppm Ammonia Nitrate Less than 0 5 ppm Less than 0 5 ppm Less than 0 5 ppm Ammonia Hydroxide Less than 0 5 ppm Less than 0 5 ppm Less than 0 5 ppm Ammoni...

Page 10: ... air is purged from the pump then tighten the plug Ensure that the loop pumps provide adequate flow through the unit s by checking the pressure drop across the heat exchanger and compar ing it to the unit capacity data in this catalog 2 5 to 3 gpm of flow per ton of cooling capacity is recommended in earth loop applications NOTE Additional information can be found in Flow Center installation manua...

Page 11: ... 5 should be OFF to cycle with the compressor i e recharge well storm sewer drain field adjacent stream or pond etc Most local codes forbid the use of sanitary sewer for disposal Consult your local building and zoning departments to assure compliance in your area NOTE For open loop groundwater systems or systems that do not contain an antifreeze solution set SW2 Switch 1 to the WELL 30 F position ...

Page 12: ... applications greater than 10 grains or 170 ppm total hardness CAUTION Elements will burn out if energized dry Water Tank Preparation To install a unit with hot water generator follow these installation guidelines 1 Turn off the power to the water heater 2 Attach a water hose to the water tank drain connection and run the other end of the hose to an open drain or outdoors 3 Close the cold water in...

Page 13: ...4 Open a hot water faucet in the building to bleed air from the system Close when full 5 Open the pressure relief valve to bleed any remaining air from the tank then close 6 If so equipped turn the venting burping screw in the center of the pump two 2 turns open water will drip out wait until all air is purged from the pump then tighten the plug Use vent couplings to bleed air from the lines 7 Car...

Page 14: ...of dry contacts has been provided to control accessory devices such as water solenoid valves on open loop installations electronic air cleaners humidifiers etc This relay contact should be used only with 24 volt signals and not line voltage power The relay has both normally open and normally closed contacts and can operate with either the fan or the compressor Use DIP switch SW2 4 and 5 to cycle t...

Page 15: ...e base to the wall Thermostat wire must be 8 conductor 4 or 5 counductor for communicating thermostats 20 AWG minimum wire Strip the wires back 1 4 inch longer strip lengths may cause shorts and insert the thermostat wires into the connector as shown Tighten the screws to ensure secure connections The thermostat has the same type connectors requiring the same wiring See instructions enclosed in th...

Page 16: ... 1 41 2 70 026 208 230 60 1 187 253 18 2 11 6 58 3 21 0 0 4 5 4 17 4 20 3 30 038 208 230 60 1 187 253 23 8 15 2 83 0 30 0 0 4 5 4 21 0 24 8 40 049 208 230 60 1 187 253 33 0 21 1 104 0 37 0 0 4 5 4 26 9 32 2 50 064 208 230 60 1 187 253 42 3 27 1 152 9 54 0 0 4 5 4 32 9 39 7 70 072 208 230 60 1 187 253 46 3 29 6 179 2 63 0 0 4 5 4 35 4 42 8 75 4 3 13 Rated voltage of 208 230 60 1 HACR circuit breake...

Page 17: ...t Knock Out Liquid Gas A B C D E F G H J K L M N P 022 030 in 19 3 22 5 26 5 1 93 6 93 15 2 16 8 9 4 11 9 12 1 14 3 9 5 4 6 8 2 cm 49 0 57 1 67 3 4 9 17 6 38 6 42 7 23 9 30 2 30 7 36 3 24 1 11 7 20 8 036 072 in 21 25 25 62 31 6 2 3 7 21 16 4 18 3 10 3 13 3 12 1 14 3 9 5 4 7 9 1 cm 54 0 65 1 80 3 5 8 18 5 41 7 46 5 26 2 33 8 30 7 36 3 24 1 11 9 23 1 B C M K L A D E H J F G N P Dimensional Data AFFI...

Page 18: ...alve Suction Line in mm 5 8 15 875 3 4 19 05 7 8 22 225 5 8 15 875 3 4 19 05 7 8 22 225 Coax and Piping Water Volume gal l 0 7 2 6 1 0 3 8 1 3 4 9 1 3 4 9 1 6 6 1 1 6 6 1 2 3 8 7 0 7 2 6 1 3 4 9 1 6 6 1 1 6 6 1 2 3 8 7 Weight Operating lb kg 164 74 174 79 212 96 213 97 246 112 251 114 292 132 189 186 236 107 250 113 271 123 290 132 Weight Packaged lb kg 184 83 194 88 232 105 233 106 266 121 271 12...

Page 19: ...aker Installed only on 15kW 20kW Heaters Electric Heat 00 None 05 5kW 022 036 only 10 10kW 030 060 only 15 15kW 042 060 only 20 20kW 060 only Rev 16 August 2013D NOTE To field convert the YAH042 060 to bottomflow air discharge the NAHBC kit must be ordered Air Handler Sizing Selection Air handlers should be designed for R 410A refrigerant and should be matched with the outdoor split compressor sec...

Page 20: ...tion in mm Sweat 3 8 9 52 Refrigerant R 410a Nominal Cooling Capacity Ton kW 1 8 6 44 2 1 7 59 2 5 8 79 3 0 10 55 3 5 12 30 4 0 14 06 5 17 58 Condensate Drain Connection FPT in mm 3 4 19 05 Blower Wheel Size Dia x W in mm 11 x 10 279 x 254 Blower Motor Type Speeds Variable Speed ECM Blower Motor Output hp W 1 2 373 1 746 Filter Standard 1 51mm MERV3 Disposable in mm 20 x 24 508 x 635 Electrical Ch...

Page 21: ...he second channel is configured as a slave for connecting the Aurora Interface Diagnostics Tool AID Tool Add On Thermostats and Zoning Description Aurora Base Aurora Advanced TP32U03YRK 04YRK MonoChrome Traditional Y1 Y2 Thermostat Elite Stat with full English fault codes and alerts traditional Y1 Y2 thermostat Optional TP32S01YRK 02YRK Traditional Y1 Y2 Thermostat Traditional Y1 Y2 thermostat Opt...

Page 22: ... for 2 to 5 seconds or by cycling the power NOTE Test mode will automatically be exited after 30 minutes Reset Configuration Mode The control is placed in reset configuration mode by holding the push button switch SW1 for 50 to 60 seconds This will reset all configuration settings and the EEPROM back to the factory default settings LED3 green will turn off when entering reset configuration mode On...

Page 23: ...for the entire length of the appropriate delay to be recognized as a fault This fault will be ignored for the initial 2 minutes of the compressor run time Over Under Voltage Shutdown An over under voltage condition exists when the control voltage is outside the range of 18 VAC to 30 VAC If the over under voltage shutdown lasts for 15 minutes the lockout and alarm relay will be energized Over under...

Page 24: ...le timer and random start timer will be initiated Input must be tied to common to activate Aurora Base Control LED Displays These three LEDs display the status configuration and fault codes for the control These can also be read in plain English via the Aurora AID Tool Status LED LED3 Green Description of Operation Fault LED Green Normal Mode ON Control is Non functional OFF Test Mode Slow Flash L...

Page 25: ...perature Fahrenheit dry bulb wet bulb HC air heating capacity MBtu h TC total cooling capacity MBtu h SC sensible cooling capacity MBtu h kW total power unit input kilowatts HR total heat of rejection MBtu h HE total heat of extraction MBtu h HWC hot water generator capacity MBtu h EER Energy Efficient Ratio Btu output Watt input COP Coefficient of Performance Btu output Btu input LWT leaving wate...

Page 26: ...r Short CycleDelay Blower Off Delay Fault RecognitionDelay HighPressure Start UpBypass LowPressure Fault RecognitionDelay LowPressure Start UpBypass LowWater Coil Limit Fault RecognitionDelay LowWater Coil Limit Fault RecognitionDelay CondensateOverflow Thermostat Call RecognitionTime Lessthan1second 5to80seconds 1second 5seconds 1second 30seconds 2seconds Lessthan1second 2minutes 5seconds 4minute...

Page 27: ...lay Compressor MinimumOnTime Compressor Short CycleDelay Blower Off Delay Fault RecognitionDelay HighPressure Start UpBypass LowPressure Fault RecognitionDelay LowPressure Start UpBypass LowWater Coil Limit Fault RecognitionDelay LowWater Coil Limit Fault RecognitionDelay CondensateOverflow Thermostat Call RecognitionTime Lessthan1second 5to80seconds 1second 5seconds 1second 30seconds 2seconds Les...

Page 28: ...ts for attaching refrigerant gauges Insulated Suction Line Braze Connection Liquid Line ccw ccw Figure 13 Typical Split System Refrigerant Line Connections Position Description System Service Port CW Full In Shipping Position Closed Open CCW Full Out 1 2 turn CW Service Position Open Open CCW Full Out Operation Position Open Closed TXV IN toward condensing unit Equalizer Bulb Suction Liquid TXV ha...

Page 29: ...olution 10 oz should be added to the recommended charge of 86 oz found in the Charge Amount with YAH Air Handler column for a total charge of 96 oz After initial charge the system should be operated and the system subcooling and superheat verified to the Unit Operating Parameters table If an air handler manufactured by others is used then refrigerant should be added to the indoor split factory pre...

Page 30: ... 1 1 8 OD 1 2 OD 92 112 070 YAH060 7 8 OD 1 2 OD 7 8 OD 1 2 OD 1 1 8 OD 1 2 OD 108 132 026 YAH026 5 8 OD 3 8 OD 3 4 OD 3 8 OD 3 4 OD 1 2 OD 52 74 038 YAH036 3 4 OD 3 8 OD 3 4 OD 3 8 OD 3 4 OD 1 2 OD 56 86 049 YAH048 3 4 OD 3 8 OD 7 8 OD 3 8 OD 7 8 OD 1 2 OD 90 115 064 YAH060 7 8 OD 1 2 OD 7 8 OD 1 2 OD 1 1 8 OD 1 2 OD 92 112 072 YAH060 7 8 OD 1 2 OD 7 8 OD 1 2 OD 1 1 8 OD 1 2 OD 104 132 4 6 10 Det...

Page 31: ...06 7 468 128 8 588 146 8 110 36 4 230 78 7 350 107 2 470 129 1 590 147 1 112 37 3 232 79 2 352 107 6 472 129 4 592 147 3 114 38 2 234 79 8 354 108 0 474 129 8 594 147 6 116 39 1 236 80 3 356 108 4 476 130 1 596 147 9 118 40 0 238 80 9 358 108 8 478 130 4 598 148 2 120 40 9 240 81 4 360 109 2 480 130 7 600 148 4 122 41 7 242 81 9 362 109 6 482 131 1 602 148 7 124 42 6 244 82 5 364 110 0 484 131 4 6...

Page 32: ...oss the air coil depending on the fan speed and entering water temperature 8 Decrease the cooling set point several degrees and verify high speed blower operation 9 Adjust the cooling setpoint above the room temperature and verify that the compressor and water valve or loop pumps deactivate 10 Initiate a control signal to place the unit in the heating mode Heating set point must be set above room ...

Page 33: ...ng Water Temp F Water Flow GPM Ton YAZS022 thru YAZS060 YAZS070 YAZS022 thru YAZS070 Suction Pressure PSIG Discharge Pressure PSIG Suction Pressure PSIG Discharge Pressure PSIG Superheat Subcooling Water Temp Drop F Air Temp Rise F DB 30 1 5 65 85 290 310 65 85 330 360 7 13 2 21 7 10 18 24 3 0 70 90 265 330 70 90 335 365 6 12 2 21 3 7 22 26 50 1 5 95 120 320 345 95 120 395 430 6 12 2 21 5 11 21 34...

Page 34: ... 140 160 375 425 7 17 7 15 4 9 24 39 Second Stage Operation Cooling No Hot Water Generator Entering Water Temp F Water Flow GPM Ton YAZT026 thru YAZT064 YAZT072 YAZT026 thru YAZT072 Suction Pressure PSIG Discharge Pressure PSIG Suction Pressure PSIG Discharge Pressure PSIG Superheat Subcooling Water Temp Rise F Air Temp Drop F DB 50 1 5 120 140 200 245 105 150 210 270 7 17 6 14 7 16 19 26 3 0 115 ...

Page 35: ...4 7 7 6 0 9 2 3 4 4 7 1 0 8 2 1 4 1 6 6 0 8 2 0 3 8 6 1 072 full load 12 15 18 21 3 2 4 5 6 0 7 8 3 0 4 2 5 7 7 3 2 8 4 0 5 3 6 8 2 6 3 7 4 9 6 4 2 4 3 4 4 6 5 9 072 part load 10 13 16 19 2 3 3 6 5 0 6 5 2 1 3 3 4 6 6 2 2 0 3 0 4 3 5 8 1 9 2 8 4 0 5 4 1 7 2 6 3 7 5 0 5 30 06 Model GPM Pressure Drop PSI 30 F 50 F 70 F 90 F 110 F 022 3 4 5 6 8 0 9 1 7 2 8 4 7 0 9 1 6 2 7 4 4 0 8 1 5 2 5 4 1 0 7 1 4 ...

Page 36: ...e Advisory High Low Normal Low High High Low Low Insufficient Compressor Possible Bad Valves Low High Low High Normal High Low Low TXV Bulb Loss of Charge Low Low Low High High Low Low Scaled Coaxial Heat Exchanger Heating Low Low Low Normal Low High Low Low Scaled Coaxial Heat Exchanger Cooling High High High Normal Low Low Low Low Restricted Filter Drier Check temperature difference delta T acro...

Page 37: ... 29 5 33 7 44 9 46 1 44 0 8 0 19 2 26 4 32 6 37 5 40 6 45 0 45 8 43 4 40 5 11 0 19 8 27 5 34 3 39 9 40 0 44 9 46 1 44 3 41 5 Full Load 6 0 33 3 40 6 46 1 60 2 60 2 56 4 9 0 26 0 34 7 42 8 49 1 56 0 60 2 60 8 57 4 52 9 12 0 26 5 35 7 44 2 50 9 56 1 60 4 61 1 57 6 53 2 064 Part Load 6 0 31 0 39 2 46 1 56 3 55 4 52 1 10 0 21 6 31 4 40 9 49 7 52 4 56 2 55 5 52 4 49 4 14 0 22 6 32 6 41 7 49 8 52 2 56 2...

Page 38: ... 6 35 7 9 0 17 9 25 2 32 9 39 4 32 5 38 9 39 9 36 8 35 9 042 5 0 26 9 33 4 36 6 46 7 47 6 43 9 8 0 20 8 28 2 35 1 42 0 43 1 46 9 47 9 44 2 42 3 11 0 21 2 29 0 36 2 43 5 43 4 47 2 48 2 44 4 43 1 048 6 0 34 7 43 5 50 7 57 6 57 5 51 3 9 0 26 5 36 3 45 8 53 8 53 4 57 8 57 9 51 7 51 6 12 0 27 0 37 3 47 2 55 6 53 7 58 1 58 0 51 8 51 6 060 9 0 41 0 52 4 61 2 75 4 74 0 68 9 12 0 28 9 42 3 54 1 65 0 72 9 7...

Page 39: ...ol Application and Troubleshooting Guide and the Instruction Guide Aurora Interface and Diagnostics AID Tool for additional information Troubleshooting Refrigerant Systems To maintain sealed circuit integrity do not install service gauges unless unit operation appears abnormal Compare the change in temperature on the air side as well as the water side to the Unit Operating Parameters tables If the...

Page 40: ...in cooling modes Cooling Cycle Analysis COOLING TXV ACTIVE RIGHT TO LEFT ClgTXV Measure liquid line temperature and pressure here in both heating and cooling modes COAX HEATING TXV ACTIVE LEFT TO RIGHT HtgTXV Measure suction temperature here at TXV bulb in heating modes Suct PSI ____ Suct sat temp ____ Volts ____ Amps ____ EWT ____ LWT ____ Suct temp ____ Super heat ____ Discharge PSI ____ Disch s...

Page 41: ...Volts m Volts Total Amps Comp Blower 3 n Amps n Amps Watts m x n x 0 85 o Watts o Watts 7 Capacity HEATING COOLING Cooling Capacity l o x 3 413 p Btu h p Btu h Heating Capacity l o x 3 413 8 Efficiency HEATING COOLING Cooling EER p o q Btu h q Btu h Heating COP p o x 3 413 9 Superheat S H Subcooling S C Software Version ABC AXB IZ2 T STAT HEATING COOLING Suction Pressure r psi r psi Suction Satura...

Page 42: ... unit and the date of failure along with an explanation of the malfunctions and a description of the replacement parts required CAUTION Fin edges are sharp Preventive Maintenance Replacement Procedures Other Maintenance Filters Filters must be clean to obtain maximum performance They should be inspected monthly under normal operating conditions and be replaced when necessary Units should never be ...

Page 43: ...9 02 36P509 01 Coax 62I594 01 62I588 01 62I542B01 62I543B01 62I555 01 TXV 33P609 01 33P609 03 33P609 05 33P609 06 Reversing Valve 33P506 04 33P503 05 33P526 04 Filter Dryer 36P500B01 36P500B02 Desuperheater Desuperheater 62P516 05 62P516 03 Desuperheater Pump 24P501 02 Electrical Contactor 13P004A03 2 Pole Screw Term Block 12P500A01 ABC Board 17X553 00 Sensors Safeties Freeze Protection Thermistor...

Page 44: ...201 62P543B01 62P555 01 TXV 33P609 01 33P609 03 33P609 05 33P609 06 Reversing Valve 33P506 04 33P503 05 33P526 04 Filter Dryer 36P500B01 36P500B02 Desuperheater Desuperheater 62P516 05 62P516 03 Desuperheater Pump 24P501 02 Electrical Contactor 13P004A03 2 Pole Screw Term Block 12P500A01 ABC Board 17X553 00 Sensors Safeties Freeze Protection Thermistor 12P505 09 HWL Thermistor 13P073B05 High Press...

Page 45: ...45 Notes AFFINITY INDOOR SPLIT SERIES INSTALLATION MANUAL ...

Page 46: ...46 Pages Description Date By All First Published 03 Sept 2013 DS Revision Guide AFFINITY INDOOR SPLIT SERIES INSTALLATION MANUAL ...

Page 47: ......

Page 48: ... specifications without notice Product Affinity Indoor Split Series Type Geothermal Water Source Heat Pump Size 2 6 Ton Single Speed 2 6 Ton Dual Capacity Document Type Installation Manual Part Number IM2503SK6 Release Date 09 13 York and Affinity are registered trademarks of Johnson Controls Inc and are used with permission ...

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