Carrier aquazone 50RTG Installation, Start-Up And Service Instructions Manual
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Carrier aquazone 50RTG Installation, Start-Up And Service Instructions Manual

Carrier aquazone 50RTG Installation, Start-Up And Service Instructions Manual

Rooftop water source heat pump units
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CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . .1,2
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Step 1 - Check Jobsite . . . . . . . . . . . . . . . . . . . . . . . . 2
Step 2 - Check Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
• STORAGE
• PROTECTION
• INSPECT UNIT
Step 3 - Location of Unit . . . . . . . . . . . . . . . . . . . . . . . . 3
Step 4 - Mounting the Unit . . . . . . . . . . . . . . . . . . . . . . 6
Step 5 - Condensate Drain . . . . . . . . . . . . . . . . . . . . . . 6
Step 6 - Piping Connections . . . . . . . . . . . . . . . . . . . . 6
Step 7 - Electrical Wiring. . . . . . . . . . . . . . . . . . . . . . . . 7
Step 8 - Low Voltage Wiring. . . . . . . . . . . . . . . . . . . . 14
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14,15
System Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
FIELD SELECTABLE INPUTS . . . . . . . . . . . . . . . .15,16
C Control Jumper Settings . . . . . . . . . . . . . . . . . . . . 15
C Control DIP Switches . . . . . . . . . . . . . . . . . . . . . . . 15
D Control Jumper Settings . . . . . . . . . . . . . . . . . . . . 15
D Control DIP Switches . . . . . . . . . . . . . . . . . . . . . . . 15
Water Valve (Slow Opening) . . . . . . . . . . . . . . . . . . . 16
Outside Air Damper (OAD) . . . . . . . . . . . . . . . . . . . . 16
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-18
Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Scroll Compressor Rotation. . . . . . . . . . . . . . . . . . . . . 17
Unit Start-Up Cooling Mode . . . . . . . . . . . . . . . . . . . . . 17
Unit Start-Up Heating Mode . . . . . . . . . . . . . . . . . . . . . 17
Flow Regulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Cooling Tower/Boiler Systems . . . . . . . . . . . . . . . . . . 18
Heat Exchanger Well Systems . . . . . . . . . . . . . . . . 18
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111
Book 1
4
Tab
5a 5a
Rooftop Water Source Heat Pump Units
Installation, Start-Up, and
Service Instructions
Page
Catalog No. 535-004
Printed in U.S.A.
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Power Up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
SYSTEM TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19,20
Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Retry Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-22
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Water Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Condensate Drain Pans . . . . . . . . . . . . . . . . . . . . . . . . . 21
Refrigerant System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Condensate Drain Cleaning . . . . . . . . . . . . . . . . . . . . . 21
Air Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Condenser Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Checking System Charge . . . . . . . . . . . . . . . . . . . . . . . 22
Refrigerant Charging. . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Air Coil Fan Motor Removal . . . . . . . . . . . . . . . . . . . . . 22
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . 22-25
Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Control Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . CL-1, CL-2
IMPORTANT: Read the entire instruction manual before
starting installation.

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical compo-
nents. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance func-
tions of cleaning coils and filters and replacing filters. All other
operations should be performed by trained service personnel.
When working on air-conditioning equipment, observe precau-
tions in the literature, tags and labels attached to the unit, and
other safety precautions that may apply.
Improper installation, adjustment, alteration, service, main-
tenance, or use can cause explosion, fire, electrical shock or
other conditions which may cause personal injury or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The
qualified installer or agency must use factory-authorized kits or
accessories when modifying this product. Refer to the individ-
ual instructions packaged with the kits or accessories when
installing.
Form 50R-2SI
Pg 1
TM
50RTG
Page
8-02
Replaces: New

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Summary of Contents for Carrier aquazone 50RTG

  • Page 1: Table Of Contents

    Rooftop Water Source Heat Pump Units 50RTG Installation, Start-Up, and Service Instructions CONTENTS Page OPERATION ........19 Page Power Up Mode .

  • Page 2: General

    Follow all safety codes. Wear safety glasses and work damage not discovered during unloading must be reported to gloves. Use quenching cloth for brazing operations. Have fire the shipping company within 15 days of receipt of shipment. extinguisher available. Read these instructions thoroughly and NOTE: It is the responsibility of the purchaser to file all follow all warnings or cautions attached to the unit.

  • Page 3: Step 3 - Location Of Unit

    INSPECT UNIT — To prepare the unit for installation, com- 7. Remove any blower support cardboard from inlet of the plete the procedures listed below: blower if present. 1. Compare the electrical data on the unit nameplate with 8. Locate and verify any accessory kit located in compressor ordering and shipping information to verify that the section.

  • Page 6: Step 4 - Mounting The Unit

    3 types of WSHP piping systems to choose from: water loop, ground-water and ground loop. Refer GROUND-WATER APPLICATIONS — In addition to com- to Piping Section of Carrier System Design Manual for addi- plying with any applicable codes, consider the following for tional information.

  • Page 7: Step 7 - Electrical Wiring

    Step 7 — Electrical Wiring AB = 452 volts BC = 464 volts AC = 455 volts 452 + 464 + 455 Average Voltage = To avoid possible injury or death due to electrical shock, open the power supply disconnect switch and secure it in an open position during installation.
  • Page 8 50RTG03-07 WITH ECONOMIZER AND COMPLETE C CONTROLLER 115V / 1PH Ground Field Wiring Power Supply Refer to Data Plate (Optional) Use copper conductors only. Compressor Disconnect Power Distribution Block (Optional) Blower Motor Logic Module (Damper Actuator) (208V) VIO or NOTE 7 BLK/RED (460V) NOTE 7...
  • Page 9 Table 3 — 50RTG Electrical Data POWER COMPRESSOR BLOWER MAX. FUSE MINIMUM UNIT SUPPLY (each) MOTOR OR HACR CIRCUIT 50RTG BREAKER AMPACITY Voltage 208/230 10.7 63.0 25 Amp 17.0 31.0 15 Amp 208/230 13.9 88.0 30 Amp 21.0 44.0 15 Amp 34.0 15 Amp 208/230...
  • Page 10 Table 5 — 50RTG04 Blower Performance EXTERNAL STATIC PRESSURE (in. wg) SCFM AIRFLOW 0.26 0.30 0.33 0.36 0.40 0.42 1300 Turns Out 0.33 0.36 0.40 0.43 0.46 0.50 0.53 Operation Not Recommended 1400 Turns Out 0.418 0.45 0.48 0.52 0.55 0.58 0.62 0.65...
  • Page 11 Table 7 — 50RTG07 Blower Performance EXTERNAL STATIC PRESSURE (in. wg) SCFM AIRFLOW 0.42 0.46 0.51 0.56 0.62 0.67 0.73 0.78 1950 Operation Not Recommended Turns Out 0.56 0.62 0.67 0.73 0.78 0.85 0.90 0.97 1.03 1.10 1.17 2200 1007 1038 Turns Out 0.70...
  • Page 12 Table 9 — 50RTG10 Blower Performance EXTERNAL STATIC PRESSURE (in. wg) SCFM AIRFLOW 0.69 0.76 0.83 0.89 0.96 1.02 1.09 1.16 1.22 1.29 1.36 1.43 1.50 1.57 3000 Turns Out 0.89 0.96 1.03 1.10 1.18 1.24 1.32 1.39 1.46 1.54 1.62 1.69 1.77...
  • Page 13 Table 11 — 50RTG15 Blower Performance EXTERNAL STATIC PRESSURE (in. wg) SCFM AIRFLOW 0.68 0.78 0.88 0.98 1.08 1.17 1.28 1.39 1.43 1.54 1.65 1.76 Operation Not 4500 Recommended Turns Out 0.87 0.98 1.09 1.20 1.31 1.42 1.52 1.65 1.76 1.87 1.94 2.07...

  • Page 14: Step 8 - Low Voltage Wiring

    Step 8 — Low Voltage Wiring THERMOSTAT CONNECTIONS — The thermostat should be wired directly to the Aquazone™ control board. See Fig. 4 and 5. WATER FREEZE PROTECTION — The Aquazone control allows the field selection of source fluid freeze protection points through jumpers.

  • Page 15: Field Selectable Inputs

    10. System Controls: To ensure that no catastrophic system D Control Jumper Settings failures occur, verify that system controls are functioning WATER COIL FREEZE PROTECTION (FP1) LIMIT and that the sequencing is correct. SETTING — Select jumper 3, (JW3-FP1 Low Temp) to 11.

  • Page 16: D Control Accessory Relay Configurations

    Boilerless Changeover Temperature — Switch 8 on S1 pro- DIGITAL NIGHT SET BACK (NSB) — In this configura- vides selection of boilerless changeover temperature set point. tion, the relay will be ON if the NSB input is connected to Select OFF for set point of 50 F or select ON for set point ground C.

  • Page 17: Scroll Compressor Rotation

    NOTE: Three factors determine the operating limits of a unit: 5. Air temperature drop across the coil should be checked (1) entering air temperature, (2) water temperature and (3) when compressor is operating. Air temperature drop ambient temperature. Whenever any of these factors are at a should be between 15 and 25 F.

  • Page 18: Antifreeze

    6. Open the return valve to send a pressure surge through Antifreeze — In areas where entering loop temperatures the loop to purge any air pockets in the piping system. drop below 40 F or where piping will be routed through areas subject to freezing, antifreeze is needed.

  • Page 19: Operation

    OPERATION HEATING STAGE 3 — In Heating Stage 3 mode, the Fan Enable, Fan Speed and Compressor relays remain on. The EH1 Power Up Mode — The unit will not operate until all the output is turned on immediately. With continuing Heat Stage 3 inputs, terminals and safety controls are checked for normal demand, EH2 will turn on after 10 minutes.

  • Page 20: Retry Mode

    Table 19 — C Control Current LED Status again satisfy the thermostat used to terminal Y. Once the ther- and Alarm Relay Operations mostat input calls are satisfied, the control will continue normal operation. LED STATUS DESCRIPTION OF OPERATION ALARM RELAY NOTE: If 3 consecutive faults occur without satisfying the Normal Mode Open...

  • Page 21: Condensate Drain Pans

    Proper water treatment can minimize tube fouling and pitting. If such conditions are anticipated, water treatment analysis is recommended. Refer to the Carrier System Design To avoid fouled machinery and extensive unit clean-up, Manual, Part 5, for general water conditioning information.

  • Page 22: Checking System Charge

    Refrigerant Charging FILL CONDENSER WITH CLEANING SOLUTION. DO PAIL NOT ADD SOLUTION MORE RAPIDLY THAN VENT CAN EXHAUST GASES CAUSED BY To prevent personal injury, wear safety glasses and gloves FUNNEL CHEMICAL ACTION. when handling refrigerant. Do not overcharge system — this can cause compressor flooding.
  • Page 23 SUCTION COIL °F °F COMPRESSOR THERMISTOR EXPANSION COAX DISCHARGE VALVE CONDENSATE OVERFLOW LIQUID (CO) LINE WATER IN WATER OUT AIR COIL WATER FREEZE COIL PROTECTION PROTECTION LEGEND COAX — Coaxial Heat Exchanger Airflow Refrigerant Liquid Line Flow Fig. 11 — FP1 and FP2 Thermistor Location...
  • Page 24 Table 22 — Troubleshooting FAULT HEATING COOLING POSSIBLE CAUSE SOLUTION Main Power Problems Green Status LED Off Check line voltage circuit breaker and disconnect. Check for line voltage between L1 and L2 on the contactor. Check for 24 VAC between R and C on controller. Check primary/secondary voltage on transformer.

  • Page 25: Troubleshooting

    Table 22 — Troubleshooting (cont) FAULT HEATING COOLING POSSIBLE CAUSE SOLUTION Only Compressor Runs Thermostat wiring Check G wiring at heat pump. Jumper G and R for fan operation. Fan motor relay Jumper G and R for fan operation. Check for line voltage across BR contacts.
  • Page 26 Copyright 2002 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 PC 111 Catalog No. 535-004 Printed in U.S.A. Form 50R-2SI Pg 26 8-02 Replaces: New...

  • Page 27: Start-Up Checklist

    50RTG START-UP CHECKLIST CUSTOMER:___________________________ JOB NAME: _______________________________________ MODEL NO.:___________________________ SERIAL NO.:____________________ DATE:_________ I. PRE-START-UP DOES THE UNIT VOLTAGE CORRESPOND WITH THE SUPPLY VOLTAGE AVAILABLE? (Y/N) HAVE THE POWER AND CONTROL WIRING CONNECTIONS BEEN MADE AND TERMINALS TIGHT? (Y/N) HAVE WATER CONNECTIONS BEEN MADE AND IS FLUID AVAILABLE AT HEAT EXCHANGER? (Y/N) HAS PUMP BEEN TURNED ON AND ARE ISOLATION VALVES OPEN? (Y/N) HAS CONDENSATE CONNECTION BEEN MADE AND IS A TRAP INSTALLED? (Y/N)
  • Page 28 (DEG F) *97B0014N02* *Use 500 for water, 485 for antifreeze. 97B0014N02 Copyright 2002 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book PC 111 Catalog No. 535-004 Printed in U.S.A.

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