Related Manuals for Trane 2GN Series
Summary of Contents for Trane 2GN Series
- Page 1 Geothermal 2GN Series Indoor Split Heat Pump Installer’s Guide R-410A Refrigerant 2, 3, 4 and 5 Tons Dual Capacity *T2GN 18-GL07D1-4 IM2503SG4...
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Page 3: Table Of Contents
2GN SPLIT INSTALLER’S GUIDE Table of Contents Model Nomenclature ..................4 Physical Data ....................4 Dimensional Data ..................5 General Installation Information ..............6 Physical Data - Air Handler ................10 Line Set Sizes .....................10 Open Loop Well Water Systems ..............11 Closed Loop Ground Source Systems ............13 Hot Water Generator Connections .............14 Electrical Data ....................16 Thermostat Wiring ..................16... -
Page 4: Model Nomenclature
2GN SPLIT INSTALLER’S GUIDE MODEL NOMENCLATURE Model Vintage T – Envirowise * - Factory Use Only Compressor Type Blower Option 2 – Dual Capacity N – None (Split) Product Category Coax Option G – Geothermal C – Copper N – CuproNickel Product Type N –... -
Page 5: Dimensional Data
2GN SPLIT INSTALLER’S GUIDE DIMENSIONAL DATA SERVICE VALVE LINE WATER WATER HIGH WIDE DEEP MODELS LIQUID VOLTAGE PUMP VOLTS 19.50 22.50 26.50 1.93 6.93 8.44 11.55 13.43 16.43 5.87 13.66 15.66 48.90 57.15 67.31 4.90 17.60 21.44 29.34 34.11 41.73 14.91 34.70 39.78... -
Page 6: General Installation Information
2GN SPLIT INSTALLER’S GUIDE GENERAL INSTALLATION Air Coil Location INFORMATION Refer to the air handler manufacturer’s instructions for the blower coil unit for details on installing the air handling portion WARNING of the system. Safety Considerations Condensate Drain Before performing service maintenance Follow the blower coil manufacturer’s instructions. - Page 7 Air handlers used with dual capacity units must be capable It is recommended that a new R-410A air handler be installed with a 2GN Series Split considering the long term of operating with a minimum of 2 blower speeds. Refer to benefi...
- Page 8 Without this heat is called for on the thermostat. At that point, the furnace switch, the 2GN Series Split will trip out on high pressure. A will be enabled and the heat pump will be disabled. The...
- Page 9 2GN SPLIT INSTALLER’S GUIDE Water Piping Figure 3: Swivel Connections The proper water fl ow must be provided to each unit whenever the unit operates. To assure proper fl ow, use pressure/ (Residential Units) temperature ports to determine the fl ow rate. These ports should be located at the supply and return water connections on the unit.
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Page 10: Physical Data - Air Handler
2GN SPLIT INSTALLER’S GUIDE PHYSICAL DATA - AIR HANDLER AIR HANDLER MODEL NUMBER TAMGA0A24 TAMGA0C36 TAMGA0C48 TAMGA0C60 (REFRIGERANT) AIR COIL TOTAL FACE AREA, FT2 3.67 [0.34] 5.50 [0.51] 5.96 [0.55] 5.96 [0.55 [M2] TUBE OUTSIDE DIAMETER - IN. 3/8 [9.52] [MM] NUMBER OF ROWS EVAPORATOR... -
Page 11: Open Loop Well Water Systems
2GN SPLIT INSTALLER’S GUIDE OPEN LOOP WELL WATER SYSTEMS Notes: For open loop/groundwater systems or sytems that do not contain an antifreeze solution, set SW2-Switch #2 to the Typical open loop piping is shown below. Always maintain “WELL” position (Refer to the DIP Switch Settings table.) Slow water pressure in the heat exchanger by placing water control opening/closing solenoid valves (type VM) are recommended valves at the outlet of the unit to prevent mineral precipitation. - Page 12 2GN SPLIT INSTALLER’S GUIDE Solenoid Wiring Water Quality Water control valves draw their power directly from a unit’s In ground water situations where scaling could be heavy or 24V transformer and can overload and possibly burn out the where biological growth such as iron bacteria will be present, transformer.
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Page 13: Closed Loop Ground Source Systems
2GN SPLIT INSTALLER’S GUIDE CLOSED LOOP GROUND SOURCE Multiple Units on One Flow Center SYSTEMS When two units are connected to one loop pumping system, pump control is automatically achieved by connecting the SL Note: For closed loop systems with antifreeze protection, set terminals on connector P2 in both units with 2-wire thermostat SW2-2 to the “loop”... -
Page 14: Hot Water Generator Connections
Drain the tank by opening the valve on the bottom of the tank, then open the pressure relief valve or hot Note: Under certain conditions, 2GN Series dual capacity water faucet. units operate with very low refrigerant discharge temperatures, producing little or no water heating capability. - Page 15 2GN SPLIT INSTALLER’S GUIDE Plumbing Installation Hot Water Generator Startup Inspect the dip tube in the water heater cold inlet Close the drain valve to the water heater. for a check valve. If a check valve is present it must Open the cold water supply to the tank.
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Page 16: Electrical Data
2GN SPLIT INSTALLER’S GUIDE ELECTRICAL DATA General Be sure the available power is the same voltage and phase as that shown on the unit serial plate. Line and low voltage wiring must be done in accordance with local codes or the National Electric Code, whichever is applicable. -
Page 17: Wiring Schematics
2GN SPLIT INSTALLER’S GUIDE Split Wiring Schematic - 208-230/60/1 Ext Pump Blue Notes: 1/2 hp Total Black 1 - 24V Accessory relay (see SW2 - 3 for description of operation) 208-230/60/1 Unit Power 2 – This Switch allows the unit to down stage with the t-stat when OFF and finish on second stage when 208-230/60/1 3 –... -
Page 18: Microprocessor Control
2GN SPLIT INSTALLER’S GUIDE MICROPROCESSOR CONTROL Hot Water High Limit (Domestic Hot Water Option) Startup This mode occurs when the hot water input temperature is The unit will not operate until all the inputs and safety controls at or above 130°F for 30 continuous seconds. The DHW limit are checked for normal conditions. - Page 19 2GN SPLIT INSTALLER’S GUIDE Emergency Heat (W only) Cool, 2nd Stage (Y1, Y2, O) The blower is started on high speed, and the fi rst stage of Dual Capacity Units resistance heat is energized 10 seconds after the "W" input. The second stage compressor will be activated 5 seconds Continuing demand will engage the additional stages of after receiving a “Y2”...
- Page 20 2GN SPLIT INSTALLER’S GUIDE Thermostat Displays Fault Flash When using a fault monitor thermostat and SW2-8 is in the pulsing “L” position (off), the system monitor will enable a user to view the thermostat and count the fault indicator fl ashes to determine the lockout condition the unit is experiencing.
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Page 21: Operation Logic Data
2GN SPLIT INSTALLER’S GUIDE OPERATION LOGIC DATA HEATING COOLING SL1 - IN SL2 - IN OPERATION LOGIC FAN ON STG1 STG2 STG3 EMERG STG1 STG2 DUAL CAPACITY UNITS COMPRESSOR-LO COMPRESSOR-HI REV VALVE LOOP PUMP DHW PUMP SECONDARY 1- OUT SECONDARY 2- OUT EMERG LED T-STAT SIGNAL Y1, Y2... -
Page 22: Dip Switch Settings
2GN SPLIT INSTALLER’S GUIDE DIP SWITCH SETTINGS DIP SWITCH DESCRIPTION OFF POSITION ON POSITION NUMBER NOT USED Service/Test Mode - Allows control of “NORM” or “TEST” operational modes. Test mode accelerates most timing functions 16 times to allow TEST NORM faster troubleshooting. -
Page 23: Refrigeration
Braze line set to the service valve stubs on the outside front of the split cabinet as shown in Figure 13. Nitrogen should The 2GN Series comes with a holding charge. The charge must be bled through the system at 2 to 3 PSI to prevent oxidation be adjusted in the fi... - Page 24 2GN SPLIT INSTALLER’S GUIDE Leak Testing If an air handler manufactured by others is used then refrigerant should be added to the 2GN Split factory charge The refrigeration line set must be pressurized and checked pre-charge. Refrigerant should be added for liquid line length. for leaks before purging and charging the unit.
- Page 25 2GN SPLIT INSTALLER’S GUIDE Determining Subcooling Measure the temperature of the liquid line on the small refrigerant line (liquid line) just outside the split cabinet. This location will be adequate for measurement in both modes unless a signifi cant temperature drop in the liquid line is anticipated.
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Page 26: Pressure \ Temperature Conversion
2GN SPLIT INSTALLER’S GUIDE PRESSURE/TEMPERATURE CONVERSION CHART FOR R-410A PRESSURE TEMP TEMP PRESSURE TEMP PRESSURE TEMP PRESSURE TEMP PRESSURE (PSIG) (PSIG) °F °F (PSIG) °F (PSIG) °F (PSIG) °F 63.5 96.3 120.6 140.0 64.2 96.8 120.9 140.3 11.2 64.8 97.2 121.3 140.6 12.5... -
Page 27: Operating Parameters
2GN SPLIT INSTALLER’S GUIDE OPERATING PARAMETERS 2GN-026 thru 2GN-064 (with TAMG Series Air Handler) First Stage Operation COOLING -- NO HOT WATER GENERATOR 2GN026 THRU 2GN064 2GN026 THRU 2GN064 ENTERING WATER SUCTION DISCHARGE WATER AIR TEMP WATER FLOW GPM/ SUPER TEMP DROP °F PRESSURE... -
Page 28: Pressure Drop
2GN SPLIT INSTALLER’S GUIDE PRESSURE DROP Dual Capacity Compressor Resistance Table 208-230/60/1 Pressure Drop (psi) Model START MODEL 30°F 50°F 70°F 90°F 110°F (OHMS) (OHMS) 1.21 - 1.39 1.52 - 1.75 0.81 - 0.94 1.41 - 1.63 Full Load 0.48 - 0.55 1.72 - 1.99 0.36 - 0.42 1.51 - 1.74... -
Page 29: Unit Startup
2GN SPLIT INSTALLER’S GUIDE UNIT STARTUP Check for an air temperature drop of 15°F to 25°F across the air coil, depending on the fan speed and Before Powering Unit, entering water temperature. Check The Following: Decrease the cooling set point several degrees and •... - Page 30 2GN SPLIT INSTALLER’S GUIDE Heating Cycle Analysis Measure suction temperature here at TXV bulb in heating modes. Measure suction Volts ____ Suct PSI____ temperature here in cooling modes. Amps ____ Suct sat temp____ Suct temp____ Super heat____ Refrigerant flow Lineset length HtgTXV Bi-flow...
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Page 31: Troubleshooting
2GN SPLIT INSTALLER’S GUIDE TROUBLESHOOTING Refrigerant Systems To maintain sealed circuit integrity, do not install service Standard Microprocessor Controls gauges unless unit operation appears abnormal. Compare To check the unit control board for proper operation: the change in temperature on the air side as well as the Disconnect thermostat wires at the control board. -
Page 32: Preventive Maintenance
fi lters. Inspect twice a year to avoid the possibility of overfl ow. CAUTION Fin edges are sharp! Trane www.Trane.com The manufacturer has a policy of continuous product American Standard and product data improvement and reserves the right to change design and specifi...