Carrier GZ024 Installation Instructions Manual
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Carrier GZ024 Installation Instructions Manual

Gz series geothermal system
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GZ Series
Geothermal System
Sizes 024, 036, 048, 060, 072
NOTE: Read the entire instruction manual before starting the installation.

TABLE OF CONTENTS

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SYSTEM FUNCTION & SEQUENCE OF OPERATION 20
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Installation Instructions
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Information in these installation instructions pertains only to GZ
series units.

SAFETY CONSIDERATIONS

1
Improper installation, adjustment, alteration, service, maintenance,
2
or use can cause explosion, fire, electrical shock, or other
3
conditions which may cause death, personal injury, or property
3
damage. Consult a qualified installer, service agency, or your
4
distributor or branch for information or assistance. The qualified
7
installer or agency must use factory- -authorized kits or accessories
7
when modifying this product. Refer to the individual instructions
9
packaged with the kits or accessories when installing.
9
Follow all safety codes. Wear safety glasses, protective clothing,
9
and work gloves. Use quenching cloth for brazing operations.
9
Have fire extinguisher available. Read these instructions
10
thoroughly and follow all warnings or cautions included in
11
literature and attached to the unit. Consult local building codes and
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current editions of the National Electrical Code (NEC) NFPA 70.
12
In Canada, refer to current editions of the Canadian electrical code
13
CSA 22.1.
15
Recognize safety information. This is the safety- -alert symbol
15
When you see this symbol on the unit and in instructions or
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manuals, be alert to the potential for personal injury. Understand
15
these signal words; DANGER, WARNING, and CAUTION. These
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words are used with the safety- -alert symbol. DANGER identifies
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the most serious hazards which will result in severe personal injury
17
or death. WARNING signifies hazards which could result in
personal injury or death. CAUTION is used to identify unsafe
17
practices which would result in minor personal injury or product
17
and property damage. NOTE is used to highlight suggestions
.
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which will result in enhanced installation, reliability, or operation.
18
18
!
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ELECTRICAL SHOCK HAZARD
20
20
Failure to follow this warning could result in personal injury
20
or death.
22
Before installing, modifying, or servicing system, main
22
electrical disconnect switch must be in the OFF position.
23
There may be more than 1 disconnect switch. Lock out and
tag switch with a suitable warning label.
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25
30
!
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31
UNIT OPERATION AND SAFETY HAZARD
31
Failure to follow this warning could result in personal injury
31
or equipment damage.
32
PuronR refrigerant systems operate at higher pressures than
32
standard R- -22 systems. Do not use R- -22 service equipment
33
or components on PuronR refrigerant equipment.
34
WARNING
WARNING
! !

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Summary of Contents for Carrier GZ024

  • Page 1: Table Of Contents

    GZ Series Geothermal System Sizes 024, 036, 048, 060, 072 Installation Instructions NOTE: Read the entire instruction manual before starting the installation. TABLE OF CONTENTS Information in these installation instructions pertains only to GZ series units. PAGE NO. SAFETY CONSIDERATIONS SAFETY CONSIDERATIONS .

  • Page 2: Installation Recommendations

    Never use air or gases containing must be reported to the carrier within 24 hours of receipt. oxygen for leak testing or operating Location / Clearance refrigerant compressors.

  • Page 3: Application Considerations

    APPLICATION CONSIDERATIONS Geothermal Systems Closed loop and pond applications require specialized design Anti- -freeze solutions are utilized when low evaporating conditions knowledge. No attempt at these installations should be made unless are expected to occur. Refer to the Flow Center installation the dealer has received specialized training.

  • Page 4: Open Loop Well Water Systems

    Open Loop Well Water Systems IMPORTANT: Table 2 must be consulted for water quality When using a single water well to supply both domestic water and the heat pump, care must be taken to insure that the well can requirements when using open loop systems. A water sample must provide sufficient flow for both.
  • Page 5 Table 2 – 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...

  • Page 6: Typical Installations

    TYPICAL INSTALLATIONS Air Handler Vibration Isolator Pad Fig. 5 - - Typical Split with Air Handler Installation Power Disconnects Vibration Isolator Pad Fig. 6 - - Typical Split with A- -coil & Furnace Installation...

  • Page 7: Matched System

    Some points to consider are: S Pressure drop (friction losses) in refrigerant suction lines reduces The GZ geothermal splits have been tested and rated with Carrier system capacity and increases power consumption by as much as & Bryant air handlers (fan coils) and evaporator coils (for use with 2% or more, depending on the line length, number of bends, etc.
  • Page 8 25 Ft. 35 Ft. 45 Ft. 50 Ft. 75 Ft. Charge (oz)* Vapor Line LIQ. LIQ. LIQ. LIQ. LIQ. GZ024 GZ036 GZ048 GZ060 1 ---1/8 1 ---1/8 1 ---1/8 1 ---1/8 1 ---1/8 GZ072 1 ---1/8 1 ---1/8 1 ---1/8...

  • Page 9: Water Piping

    WATER PIPING Water Solenoid Valves Supply and return piping must be as large as the unit connections Open loop well water applications require a water solenoid valve. on the heat pump (larger on long runs). The purpose of the valve is to allow water to flow through the GHP only during operation.

  • Page 10: Typical Open Loop Piping

    Typical Open Loop Piping Open loop systems require a water solenoid valve to turn on the temperature pressure drop start- -up during water when the heat pump compressor is energized, and to turn off troubleshooting. the water when the compressor is off. Fig.

  • Page 11: Hrp Water Piping

    HRP Water Piping Water Tank Refill All hot water piping MUST be a minimum of 5/8” O.D. copper 1. Open the cold water supply to the tank. tube to a maximum distance of 15 feet. For distances beyond 15 2. Open a hot water faucet to vent air from the system until feet, but not exceeding 60 feet, use 1/2”...

  • Page 12: Electronic Thermostat Installation

    Fig. 14.) On a non- -communicating system, output W1 is Table 9 – Recommended Thermostats connected to the control board for auxiliary heat. For Carrier Systems: Bryant Systems: Infinityr Touch Wall Control Evolutionr Connex™ Wall Control Non- -communicating, any standard multi- -stage HP (3 heat, 2 cool)

  • Page 13: Electrical

    ELECTRICAL Utility Curtailment Utility curtailment is a voluntary energy saving program offered Refer to electrical component box layout. See Fig. 15. through utility companies in some locations. Utility company will CAUTION provide the equipment that allows them to cut back demand on equipment during peak demand times.
  • Page 14 Communicating controls notes: 1. The UPM board includes a delay at terminal Y1 (connector ST1) that delays the compressor from starting after receiving a call from the thermostat to provide time for the valve to fully open. Therefore, the end switch is not used for communicating controls.

  • Page 15: Factory Installed Features

    FACTORY INSTALLED FEATURES FIELD INSTALLED ACCESSORIES A number of factory installed options are available on the GZ Liquid Line Solenoid Accessory Series of Heat Pumps. The following details the purpose, function Experience and good design practice dictate 75 feet as the and components of each option.

  • Page 16: Outdoor Air Temperature Sensor (Oat)

    Fig. 20 - - OAT Sensor Connection Table 10 – Recommended Hard Start Kits Unit Size Compressor Hard Start Kit Start Cap Start MFD Start Cap Volts Start Relay GZ024 ZPS20K5E ---PFV KSAHS2501AAA HC95DE088 88 ---108 HN61HB540 GZ036 ZPS30K5E ---PFV KSAHS2501AAA...

  • Page 17: Pre Start- -Up Checklist

    PRE START- -UP CHECKLIST UNIT START- -UP If the unit utilizes the Communicating User Interface, reference CAUTION information in the User Interface Quick Setup section. Non- -communicating thermostats: UNIT DAMAGE AND/OR OPERATION HAZARD jSet the thermostat to the highest setting. Failure to follow this caution may result in unit damage jSet the thermostat system switch to “COOL”, and the fan switch and/or improper equipment operation.

  • Page 18: Ui System Initial Power Up And Checkout

    UI SYSTEM INITIAL POWER UP AND SYSTEM VERIFICATION CHECKOUT (COMMUNICATING & NON- - COMMUNICATING) j The unit is shipped with a Unit Start- -up Checklist in the WARNING literature package. Allow the unit to operate for minimum of 5 minutes between system changes to stabilize before checking system performance.
  • Page 19 START RESET ON R RESET ON Y1 = ON R = 24VAC POWER/ SWITCHES/SENSOR CLEAR FAULTS STATUS CHECK BLINK CODE ON STATUS LED COUNTER SOFT LOCKOUT V > 170VAC NEEDED? RECORD ALARM START COUNTER (IF APPLICABLE) CNT = CNT+1 HPC = CLOSED LOCKOUT CAN BE SET COUNT = 2...

  • Page 20: Communication And Status Function Lights

    SYSTEM FUNCTIONS AND SEQUENCE Safety Devices and UPM Board OF OPERATION GZ models utilize either a Communicating Wall Control or a standard 2- -stage heat pump thermostat. With a call for first stage cooling/heating, the low stage is energized. If low- -stage cannot satisfy the cooling/heating demand, high stage is energized by the second stage of indoor thermostat.
  • Page 21 energized until the low pressure switch closes and the anti- -short CAUTION cycle time delay expires. If the low pressure switch opens 2- -4 times in 1 hour, the unit will enter a 4 hour lockout period. S ANTI- -SHORT CYCLE TIMER: 5 minute delay on break UNIT DAMAGE AND/OR OPERATION HAZARD timer to prevent compressor short cycling.

  • Page 22: Timer Speedup/Test Mode

    AUXILIARY HEAT LOCKOUT protector closes, (at the next 15 minute interval check) the unit will resume operation. If the thermal protector trips for three The following applies to GZ split units used with a gas furnace or consecutive cycles, then unit operation is locked out for 4 hours fan coil with electric heat: and the appropriate fault code is displayed.

  • Page 23: Blower Performance Data Table

    Table 12 – Blower Performance Data - - Variable Speed Constant CFM CFM From Communicating Wall Control Models Min Airflow (CFM) Airflow Settings Heating Cooling EFF 1 024 --- Low EFF 2 QUIET EFF 1 024 --- High EFF 2 QUIET 1171 1171...

  • Page 24: Water Side Pressure Drop (Psig) Table

    60ºF 70ºF 80ºF 90ºF 100ºF 110ºF GZ024 GZ036 GZ048 GZ060 GZ072 This chart shows approximate temperatures and pressures for a unit in good repair. The values shown are meant as a guide only and should not be used to estimate system charge. This chart assumes rated air flow and 80°F d.b./67°F w.b. entering air temperature in cooling, 70°F d.b. entering air temperature in heating.

  • Page 25: Operating Temp. And Pressures Tables

    14-17 18-20 98-122 291-356 20-23 50° 124-151 204-250 19-22 110-130 298-364 21-24 134-163 249-305 13-16 17-20 112-136 304-372 8-10 22-26 GZ024 60° 128-156 233-287 18-21 117-143 312-381 23-28 Part 138-168 281-341 13-16 17-19 124-152 318-389 9-11 24-29 Load 70° 133-161...
  • Page 26 Operating Temperatures and Pressures COOLING HEATING Entering Suction Discharge Water Suction Discharge Water Model Water Water Pressure Pressure Temp Temp Pressure Pressure Temp Temp Temp. °F Flow PSIG PSIG Rise °F Drop °F PSIG PSIG Drop Rise °F 73-89 266-325 15-18 30°...
  • Page 27 Operating Temperatures and Pressures COOLING HEATING Entering Suction Discharge Water Suction Discharge Water Model Water Water Pressure Pressure Temp Temp Pressure Pressure Temp Temp Temp. °F Flow PSIG PSIG Rise °F Drop °F PSIG PSIG Drop Rise °F 64-78 248-303 15-18 30°...
  • Page 28 Operating Temperatures and Pressures COOLING HEATING Entering Suction Discharge Water Suction Discharge Water Model Water Water Pressure Pressure Temp Temp Pressure Pressure Temp Temp Temp. °F Flow PSIG PSIG Rise °F Drop °F PSIG PSIG Drop Rise °F 68-84 256-313 19-23 30°...
  • Page 29 Operating Temperatures and Pressures COOLING HEATING Entering Suction Discharge Water Suction Discharge Water Model Water Water Pressure Pressure Temp Temp Pressure Pressure Temp Temp Temp. °F Flow PSIG PSIG Rise °F Drop °F PSIG PSIG Drop Rise °F 71-87 259-316 19-23 30°...

  • Page 30: Troubleshooting

    TROUBLESHOOTING IMPORTANT: The following Troubleshooting tables are designed to help identify possible causes and solutions for problems. There could be more than one cause/solution to a problem that can be applied. Check each cause and adopt ”process of elimination” and/or verification of each before making a conclusion. Table 15 shows the status codes flashed by the amber status light.

  • Page 31: Troubleshooting Units For Proper Switching Between Low & High Stages

    24V AC signal to 24V DC. DO NOT INSTALL A PLUG WITHOUT AN INTERNAL Model Plug Model Pins 1--- 4 Pins 2--- 3 Number RECTIFIER. GZ024 HK70EZ001 5.1K Unloader Test Procedure GZ036 HK70EZ002 5.1K The unloader is the compressor internal mechanism, controlled by the DC solenoid, that modulates between high and low stage.

  • Page 32: Service Tool

    Service Tool To use a service tool, connect the A and B communication bus wires from this second communicating control to the terminals marked A and B on the terminal strip located in the bottom left corner of the UPM board (see Fig. 25). But instead of connecting the wires on the service tool to the terminals marked C and D, connect the C and D wires from the service tool to the 24V and C on ST1 as shown in Fig.

  • Page 33: K Temperature Sensor Resistance Table

    Table 18 – 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 34: Maintenance

    MAINTENANCE S An annual “checkup” is recommended by a qualified refrigeration mechanic. S Recording the performance measurements of volts, amps, and water temperature differences (both heating and cooling) is recommended. This data should be compared to the information on the unit’s data plate and the data taken at the original startup of the equipment.

This manual is also suitable for:

Gz048Gz060Gz036Gz072

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