Manual 2100-537
I
Page 2 of 54
CONTENTS
Getting Other Informations and Publications..............3
General Information Geo-Trio (GT Series)
Water Source Nomenclature.................................................... 4
Blower Conversion & Line Power Connect ............................ 15
Application and Location
General ............................................................................ 18
Shipping Damage................................................................... 18
Application ............................................................................ 18
Dual Fuel Heating / Cooling ................................................... 18
Location ............................................................................ 18
Ductwork ............................................................................ 18
Filters ............................................................................ 19
Condensate Drain .................................................................. 19
Piping Access to Unit.............................................................. 19
Wiring Instructions
General ............................................................................ 22
Control Circuit Wiring.............................................................. 22
Wall Thermostats & Low Voltage Connections....................... 22
Ground Loop (Earth Coupled Water Loop Applications)
Note ............................................................................ 24
Circulation System Design..................................................... 24
Start Up Procedure for Ground Loop System ........................ 25
Ground Water (Well System Applications)
Note ............................................................................ 27
Water Connections................................................................. 27
Well Pump Sizing ...........................................................27 & 28
Start Up Procedure for Ground Water System....................... 29
Water Corrosion .............................................................29 & 30
Remedies of Water Problems................................................. 30
Lake and/or Pond Installations.......................................30 & 31
Desuperheater
Description ............................................................................ 32
Location ............................................................................ 32
Electrical Connection.............................................................. 32
Installation Procedure - General............................................. 32
Oper. of Heat Recovery Unit .................................................. 33
Start Up & Checkout............................................................... 33
Maintenance & Control Board Seq. of Operation...........33 & 37
Sequence of Operation
Blower ............................................................................ 38
Part / Full Load Cooling.......................................................... 38
Part / Full Load Heating.......................................................... 38
Supplementary Electric Heat.................................................. 38
Geothermal Logic Controls..................................................... 38
High / Low Pressure Switch ................................................... 39
Freeze Stat ............................................................................ 39
Condensate Overow ............................................................ 39
Under/Over Voltage Protection............................................... 39
Intelligent Reset...................................................................... 39
Alarm Output.......................................................................... 39
Pressure Service Ports........................................................... 39
System Start Up..................................................................... 39
Refrigerant Charge
Line Set Installation (GTA Coil Sections)................................ 42
Charge Adjustment.............................................................. 42
Refrigerant Fitting Attachment............................................ 42
Checking Charge Quantity..................................................... 42
General / GTADP Coi Sections .............................................. 43
Line Set Installation (GTADP Coil Sections)........................... 43
General / Topping Off System / Safety Practices ................... 44
Service
Service Hints.......................................................................... 47
Unbrazing System Components............................................. 47
Compressor Solenoid............................................................. 47
Troubleshooting GE ECM 2.3 Motors.............................48 & 49
Troubleshooting Table ............................................................ 50
Power Connector Table.......................................................... 50
Ground Source Heat Pump
Performance Report................................................51-52
Wiring Diagrams......................................................53-54
Figures
Figure 1A GTA****UD1AA Dimensions ................................. 7
Figure 1B GTADP Fossil Fuel ADP Coil Dimensions............ 8
Figure 1C GTB1-A Dimensions............................................. 9
Figure 1D GTC**S2-D Dimensions..................................... 10
Figure 1E Assembled Upow/Counterow App. .................11
Figure 1F Horizontal App. Dimensions ............................... 12
Figure 2A Upow & Counterow Ducting Cong.................. 13
Figure 2B Horiz. & Counterow Ducting Cong................... 14
Figure 3 Blower Conguration .......................................... 16
Figure 4 Blower Power Connections ................................ 17
Figure 5A Upow Air Filter Applications .............................. 21
Figure 5B Counterow Air Filter Applications...................... 21
Figure 5C Horiz. Left Discharge Air FilterApp..................... 21
Figure 5D Horiz. Front Discharge App................................ 21
Figure 6 Thermostat Wiring.............................................. 23
Figure 7 Circulation System Design ................................. 24
Figure 8 Temperature & Pressure Measurement .............. 26
Figure 9 Perf. Model DORFC-1 Flow Ctr.......................... 26
Figure 10 Perf. Model DORFC-2 Flow Ctr.......................... 26
Figure 11 Water Connection Components.......................... 28
Figure 12 Cleaning Water Coil............................................ 30
Figure 13 Lake or Pond Installation.................................... 31
Figure 14 Wiring Diagram................................................... 34
Figure15A Desuperheater Single Tank System ...................... 35
Figure 15B Desuperheater Dual Tank System....................... 36
Figure 16 Thermistor .......................................................... 37
Figure 17 Component Location .......................................... 40
Figure 18 Control Panel...................................................... 40
Figure 19 Refrigerant Flow Diagrams................................. 41
Figure 20 Coil Spacer......................................................... 43
Figure 21 Pressure Tables.................................................. 45
Figure 22 Control Disassembly........................................... 49
Figure 23 Winding Test....................................................... 49
Figure 24 Drip Loop............................................................ 49
Figure 25 Control Connector Motor Half............................. 50
Tables
Table 1 Indoor Blower Performance.................................. 5
Table 2 Flow Rates for Various Fluids............................... 5
Table 3 Specications ....................................................... 5
Table 4 Water Coil Pressure Drop..................................... 6
Table 5 Electrical Heat Specications ............................. 19
Table 6 Filter Sizing Chart............................................... 20
Table 7 Control Circuit Wiring.......................................... 22
Table 8 Constant Flow Valves......................................... 27
Table 9 Pre-Charged Line Set Qty.................................. 42
Quick Reference Troubleshooting Chart ................................ 46
