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GT Series
Geothermal Heat Pump
Sizes 024, 036, 048, 060, 072
NOTE: Read the entire instruction manual before starting the installation.
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Installation Instructions
TABLE OF CONTENTS
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Table of Contents
Related Manuals for Bryant Gt 024
Summary of Contents for Bryant Gt 024
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Page 1: Table Of Contents
GT Series Geothermal Heat Pump Sizes 024, 036, 048, 060, 072 Installation Instructions NOTE: Read the entire instruction manual before starting the installation. TABLE OF CONTENTS PAGE NO. SAFETY CONSIDERATIONS ..............APPLICATION CONSIDERATIONS . -
Page 2: Safety Considerations
Information in these installation instructions pertains only to GT WARNING series units. SAFETY CONSIDERATIONS EXPLOSION HAZARD Improper installation, adjustment, alteration, service, maintenance, Failure to follow this warning could or use can cause explosion, fire, electrical shock, or other result in death, serious personal injury, conditions which may cause death, personal injury, or property and/or property damage. -
Page 3: Application Considerations
APPLICATION CONSIDERATIONS Geothermal Systems Closed loop and pond applications require specialized design are utilized when low evaporating conditions are expected to occur. knowledge. No attempt at these installations should be made unless Refer to the Flow Center installation manuals for more specific the dealer has received specialized training. -
Page 4: Well Water Systems
Well Water Systems IMPORTANT: Table 1 must be consulted for water quality Proper testing is required to assure the well water quality is suitable for use with water source equipment. requirements when using open loop systems. A water sample must be obtained and tested, with the results compared to the table. - Page 5 Table 1 – Water Quality Requirements for Open- -Loop Geothermal Heat Pump System Water Quality Parameter HX Material Closed Recirculating Open Loop and Recirculating Well Scaling Potential - Primary Measurement Above the given limits, scaling is likely to occur. Scaling indexes should be calculated using the limits below: pH/Calcium Hardness pH <7.5 and Ca Hardness <100ppm Method...
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Page 6: Installation Recommendations
INSTALLATION RECOMMENDATIONS of damage or shortage, remember that the purchaser is responsible for filing the necessary claims with the carrier. Concealed damages The Water- -to- -Air Heat Pumps are designed to operate with not discovered until after removing the units from the packaging entering fluid temperature between 20_F to 90_F in the heating must be reported to the carrier within 24 hours of receipt. - Page 7 OR BR YL YL BR WH YL BR WH BK WH LOW VOLT HIGH VOLT A150437 Fig. 4 - - Constant Airflow Motor...
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Page 8: Mounting Vertical Units
MOUNTING VERTICAL UNITS CONDENSATE DRAIN Vertical units should be mounted level on a vibration absorbing pad slightly larger than the base to minimize vibration transmission to the building structure. It is not necessary to anchor the unit to the floor. See Fig. 5. NOTE: On VT and CF units, the condensate drain pan is internally sloped. -
Page 9: Piping
ELECTRICAL There should be no direct straight air path through the return air grille into the heat pump. The return air inlet to the heat pump must Refer to electrical component box layout. See Fig. 7. have at least one 90 degree turn away from the space return air CAUTION grille. -
Page 10: Safety Devices And Upm Controller
Safety Devices and UPM Controller S Water side freeze protection sensor, mounted close to condensing water coil, monitors refrigerant temperature between condensing water coil and thermal expansion valve. If temperature drops below or remains at freeze limit trip for 30 seconds, the controller will shut down the compressor and enter into a soft lockout condition. - Page 11 S The condensate overflow protection sensor is located in the drain S MALFUNCTION OUTPUT: Alarm output is Normally Open pan of the unit and connected to the ”COND” terminal on the (NO) dry contact. If pulse is selected the alarm output will be UPM board.
- Page 12 Table 2 – 10K Temperature Sensor Resistance Table ° C ° F ° C ° F ° C ° F ° C ° F ---55 ---67 963,800 ---9 52,410 6,015 1,141 ---54 ---65 895,300 ---8 49,660 5,774 1,105 ---53 ---63 832,100 ---7 47,070...
- Page 13 START RESET ON R RESET ON Y1 = ON R = 24VAC POWER/ SWITCHES/SENSOR CLEAR FAULTS STATUS CHECK BLINK CODE ON STATUS LED SOFT LOCKOUT COUNTER V > 18VAC RECORD ALARM NEEDED? START COUNTER (IF APPLICABLE) LOCKOUT CAN BE SET COUNT = 2 TO 4 VIA DIP SWITCH HPC =...
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Page 14: Ecm Interface Board
Relative Humidity Control (Carrier Edge TP- -PRH or (6) CFM Count Indicator TP- -NRH / Bryant Preferred T6- -PRH or T6- -NRH), the unit’s Fig. 13 - - ECM Interface Board dehumidification mode is in reverse logic and will not activate NOTE: CFM LED indication is an approximation. - Page 15 Dehumidification Configuration For Cor/Housewise Thermostats (Carrier: TP- -WEM01 / Bryant: T6- -WEM01) These thermostats allow dehum operation without need for a relay if the dehum active status is selected to “Closed” NOTE: Super- -dehum mode is not available in screen options when DEHUM ACTIVE status is selected and is not recommended if using DEHUM ACTIVE status of “Open”...
- Page 16 ECM CONTROL BOARD DE-HUMIDIFICATION OPTIONS START SEQUENCE OF OPERATION MOTOR RUNS WITH G = ON SIGNAL ADJUST / DELAY STATUS DIP SWITCH CHECK IMPORTANT: ADJ = “ADJ +” AND “ADJ – “ , INCREASE ADJ = + ADJ = - ADJ = TEST NORMAL OR DECREASE APROX 15% OF...
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Page 17: Constant Airflow Motor
Airflow Selector Comfort Alert Diagnostics Module (CADM) The airflow selector (see Fig. 13, items 2 and 3 and Fig. 18) allows The Comfort Alert Diagnostics Module (CADM) is a breakthrough airflow adjustment to meet application requirements and to ease innovation for troubleshooting heat pump system failures (see Fig. troubleshooting. -
Page 18: Factory Installed Features
FACTORY INSTALLED FEATURES Optional for A number of factory installed options are available on the GT remote alarm Series of Heat Pumps. The following details the purpose, function and components of each option. Smart Start Smart Start Assist Assist The Smart Start Assist (SSA) is designed to reduce the in- -rush draw during single- -phase scroll start- -up. -
Page 19: Heat Recovery Package (Hrp)
Heat Recovery Package (HRP) CAUTION (optional) The heat recovery package is a factory installed option on GT UNIT DAMAGE AND/OR OPERATION HAZARD series heat pumps. The HRP can be used to heat potable water Failure to follow this caution may result in unit damage during unit operation using waste heat from the compressor and/or improper equipment operation. -
Page 20: Field Installed Accessories
Water Tank Refill Initial Start- -Up 1. Open the cold water supply to the tank. CAUTION 2. Open a hot water faucet to vent air from the system until water flows from the faucet, then close. UNIT DAMAGE AND/OR OPERATION HAZARD 3. -
Page 21: Sequence Of Operation
SEQUENCE OF OPERATION ELECTRONIC THERMOSTAT INSTALLATION Cooling Mode Position the thermostat sub- -base against the wall so that it is level Energizing the “O” terminal energizes the unit reversing valve thus and the thermostat wires protrude through the middle of the placing the unit into cooling mode. -
Page 22: System Checkout
SYSTEM CHECKOUT UNIT START- - UP NOTE: A unit Start- -Up checklist is included in the unit packet. After completing the installation, and before energizing the unit, Complete the Checklist and place it in the customer file at your the following system checks should be made: dealership. -
Page 23: Troubleshooting
TROUBLESHOOTING IMPORTANT: The following Troubleshooting tables are GT Series Water Source Heat Pump is equipped with an externally designed to help identify possible causes and solutions for mounted LCD screen that displays unit errors. (See Fig. 24) problems. There could be more than one cause/solution to a problem that can be applied. - Page 24 Unit Troubleshooting Problem Possible Cause Checks and Correction ENTIRE UNIT Power Supply Off Apply power, close disconnect DOES NOT RUN Blown Fuse Replace fuse or reset circuit breaker. Check for correct fuses Voltage Supply If voltage is below minimum voltage specified on unit data plate, contact local power company.
- Page 25 Unit Troubleshooting (continued) Problem Possible Cause Checks and Correction UNIT SHORT Unit oversized Recalculate heating and or cooling loads. CYCLES Thermostat Thermostat installed near a supply air grill; relocate thermostat. Readjust heat anticipator. Wiring and Check for defective or improperly calibrated low pressure switch. controls INSUFFICIENT Unit undersized...
- Page 26 Comfort Alert Module -Flash Codes Status LED Status LED Description Status LED Troubleshooting Information Solution YELLOW "ALERT" Short Cycling 1. Thermostat demand signal is intermittent FLASH CODE 3 Compressor is 2. Time delay relay or control board defective running only briefly 3.
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Page 27: Operating Temperatures And Pressures Tables
Operating Temperatures and Pressures COOLING HEATING Entering Suction Discharge Water Suction Discharge Water Model Water Pressure Pressure Temp Temp Pressure Pressure Temp Temp Temp. F Flow PSIG PSIG Rise °F Drop °F PSIG PSIG Drop Rise °F 75-91 264-322 15-17 30°... - Page 28 Operating Temperatures and Pressures COOLING HEATING 73-89 266-325 15-18 30° 77-94 272-333 16-19 117-143 189-231 14-17 18-22 86-105 279-341 17-21 40° 112-137 178-217 19-24 90-110 286-350 18-22 126-154 221-270 14-17 18-21 105-125 293-358 20-24 50° 121-148 207-253 19-23 109-130 300-366 21-25 131-160 252-308...
- Page 29 Operating Temperatures and Pressures COOLING HEATING 64-78 248-303 15-18 30° 12.0 67-82 254-311 16-19 109-134 183-224 18-22 19-23 75-91 261-319 17-21 40° 12.0 105-128 172-210 10-12 20-25 79-96 267-327 18-23 118-144 214-261 18-22 19-23 78-90 273-334 8-10 20-24 50° 12.0 113-138 201-245 10-12...
- Page 30 Operating Temperatures and Pressures COOLING HEATING 68-84 256-313 19-23 30° 14.0 73-89 261-319 20-25 113-138 172-210 18-22 19-23 81-99 277-339 22-26 40° 14.0 110-134 161-196 12-14 20-24 86-105 283-346 23-28 116-142 206-252 17-21 19-23 93-114 299-365 24-29 50° 14.0 112-137 193-236 12-14 19-24...
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Page 31: Airflow Tables
Operating Temperatures and Pressures COOLING HEATING 71-87 259-316 19-23 30° 18.0 76-92 264-322 20-25 116-141 175-213 18-22 19-23 84-102 280-342 22-26 40° 18.0 113-137 164-199 12-14 20-24 89-108 286-349 23-28 119-145 209-255 17-21 19-23 96-117 302-368 24-29 50° 18.0 115-140 196-239 12-14 19-24... - Page 32 ECM Const CFM Motor Rated External Static Pressure (in of Water) Models Speed Airflow Adjust Tap 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 GT024 Normal Part Load GT024 Normal Full Load GT036 Normal Part Load 1300 1300 1300 1300 1300 1300 1300 1300...
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Page 33: Water Side Pressure Drop Table
Water Side Pressure Drop Table Heat Pump water pressure drop Additional pressure drop in hose kit* Model Water PD @ 77°EWT with Water in Psi Water PD in Psi 0.04 GT024 0.09 0.17 0.09 GT036 0.22 0.35 0.17 GT048 0.35 0.61 0.26 GT060... -
Page 34: Smart Start Led Indicators
Table 4 – Smart start assist Led indicators Red LED Relay Contact* Condition Action Min. recovery time between starts and/or recov- Auto reset when minimum recovery tie Fully ON 11/12 ery time between stop to start elapses. 2 flashes 11/14 Under--- voltage (Ue <... - Page 35 A14036 Fig. 27 - - Side Panel Removal A14039 Fig. 30 - - Screws Holding Blower Assembly A14037 Fig. 28 - - Blower Motor Wring & Ground Wire Location A14040 Fig. 31 - - Screws Holding Blower Bracket A14038 Fig. 29 - - Screws Holding Bracket A14041 Fig.
- Page 36 7. Remove and retain remaining bracket by removing (2) screws. See Fig. 33. 8. Remove the blower assembly by sliding it forward. See Fig. 34. NOTE: Unit top is notched to allow blower to slide through. 9. Remove and discard blower collar by removing (8) screws. See Fig.
- Page 37 13. Reinstall remaining bracket using (2) screws. See Fig. 39. 14. Connect vertical and horizontal brackets by installing (4) screws. See Fig. 40. A14036 Fig. 41 - - Side and End Panel Removal A14048 Fig. 39 - - Reinstalling Bracket A14037 Fig.
- Page 38 4. Slide blower assembly away from mounting bracket. See Fig. 44. 5. Remove and retain (1) vertical bracket by removing (2) screws . See Fig. 45. 6. Remove and discard horizontal blower bracket by removing (3) screws. See Fig. 46. 7.
- Page 39 10. Remove and discard blower collar by removing (8) screws. See Fig. 50. 11. Reorient the blower assembly 180 degrees with blower “belly” up. See Fig. 51. 12. Move the blower back into the cabinet. See Fig. 52. 13. Reinstall (2) vertical blower brackets in the new horizontal position using (4) screws.
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Page 40: Counter- -Flow Configuration
Counter- -Flow Configuration NOTE: Internally mounted electric heat is only available in Top Discharge configuration. See table below for details. The Counter- -Flow Configuration water source heat pump is a dedicated down flow configuration. Available from the factory in Blower Orientation and Electric Heat Compatibility Left- -hand and right- -hand return air configurations. - Page 41 Table 5 – Possible Unit Configurations Required steps Possible unit configurations How to use this table: • Select desired configuration from “possible unit configurations”. • Instructions with “X” have to be performed to reconfigure the unit. Right return, Right return, Left return, Right Left return,...
- Page 42 2. Remove and retain Condensing Section access panels Blower Re- -Configuration (bottom panel) by removing (3) screws. See Fig. 61. NOTE: This instruction details re- -configuration of blower from 3. Remove and retain Air Handler Panel by lifting up and out UP to SIDE discharge.
- Page 43 4. Remove screws on both sides of the blower securing verti- cal blower bracket to horizontal support. See Fig. 67. 5. Remove and retain blower assembly by lifting up. See Fig. CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation.
- Page 44 8. Reinstall brackets removed in Step (9) on the same side of the unit as the blower outlet. See Fig. 71. NOTE: Ensure bracket with push- -in rubber bump stops is installed in the top position. 9. Remove and retain vertical brackets from blower by removing (4) screws, (2) on each side of the blower.
- Page 45 12. Reinstall blower motor and inlet ring assembly by reversing Condensate Drain Connection Re- -Configuration Step 6. See Fig. 75. When re- -configuring the unit from Left- -Hand Return to 13. Reconnect blower motor electrical plug and ground wire. Right- -Hand Return, it is necessary to relocate condensate drain 14.
- Page 46 4. Reinstall the removed plastic plugs in the original Conden- HRP Switch Relocation sate Drain Location. The HRP Pump Disconnect Switch is mounted on front right 5. Route the flexible plastic tube from FRONT left corner post corner post. See Fig. 82. to BACK left.