Carrier aquazone 50RTG Instruction Manual download pdf

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

PC 111 Catalog No. 535-004 Printed in U.S.A. Form 50R-2SI Pg 1 8-02 Replaces: New

Book 1 4

Ta b 5 a 5 a

Installation, Start-Up, and

Service Instructions

CONTENTS

Page

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

• WATER LOOP APPLICATIONS

• GROUND-WATER APPLICATIONS

• GROUND-LOOP APPLICATIONS

Step 7 — Electrical Wiring. . . . . . . . . . . . . . . . . . . . . . . . 7

• SUPPLY VOLTAGE

• 208-VOLT OPERATION

• BLOWER SELECTION

Step 8 — Low Voltage Wiring. . . . . . . . . . . . . . . . . . . . 14

• THERMOSTAT CONNECTIONS

• WATER FREEZE PROTECTION

• AIR COIL FREEZE PROTECTION

• ACCESSORY CONNECTIONS

• WATER SOLENOID VALVES

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

D Control Accessory Relay Configurations . . . . . 16

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

Ground Coupled, Closed Loop and Plateframe

Heat Exchanger Well Systems . . . . . . . . . . . . . . . . 18

Page

OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Power Up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Units with Aquazone™ Complete C Control . . . . . 19

Units with Aquazone Deluxe D Control . . . . . . . . . . 19

SYSTEM TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19,20

Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Retry Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Aquazone Deluxe D Control LED Indicators . . . . . 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

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.

IMPORTANT: Read the entire instruction manual before

starting installation.

Rooftop Water Source Heat Pump Units

50RTG

1 2 ... 28

Summary of Contents

Page 1 - Service Instructions

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 1

Page 2 - Step 2 — Check Unit —

10Table 5 — 50RTG04 Blower Performance LEGENDNOTES:1. Fan BHP includes drive losses.2. Region “A” is standard drive package.3. Regions “B” and “C” req

Page 3 - Step 3 — Location of Unit —

11Table 7 — 50RTG07 Blower Performance LEGENDNOTES:1. Fan BHP includes drive losses.2. Region “A” is standard drive package.3. Regions “B” and “C” req

Page 4

12Table 9 — 50RTG10 Blower Performance LEGENDNOTES:1. Fan BHP includes drive losses.2. Region “A” is standard drive package.3. Regions “B” and “C” req

Page 5 - Return Air

13Table 11 — 50RTG15 Blower Performance LEGENDNOTES:1. Fan BHP includes drive losses.2. Region “A” is standard drive package.3. Regions “B” and “C” re

Page 6 - Step 5 — Condensate Drain

14Step 8 — Low Voltage WiringTHERMOSTAT CONNECTIONS — The thermostat shouldbe wired directly to the Aquazone™ control board. SeeFig. 4 and 5.WATER FRE

Page 7 - Step 7 — Electrical Wiring

1510. System Controls: To ensure that no catastrophic systemfailures occur, verify that system controls are functioningand that the sequencing is corr

Page 8 - Microprocessor

16Boilerless Changeover Temperature — Switch 8 on S1 pro-vides selection of boilerless changeover temperature set point.Select OFF for set point of 50

Page 9

17NOTE: Three factors determine the operating limits of a unit:(1) entering air temperature, (2) water temperature and (3)ambient temperature. Wheneve

Page 10

186. Open the return valve to send a pressure surge throughthe loop to purge any air pockets in the piping system.7. A noticeable drop in fluid level

Page 11

19OPERATIONPower Up Mode — The unit will not operate until all theinputs, terminals and safety controls are checked for normaloperation.NOTE: The comp

Page 12

2Follow all safety codes. Wear safety glasses and workgloves. Use quenching cloth for brazing operations. Have fireextinguisher available. Read these

Page 13

20Table 19 — C Control Current LED Statusand Alarm Relay OperationsLEGENDNOTES:1. Slow flash is 1 flash every 2 seconds.2. Fast flash is 2 flashes eve

Page 14 - System Checkout —

21Table 21 — Aquazone D Control Current LED Status and Alarm Relay OperationsLEGEND NOTES:1. If there is no fault in memory, the Fault LED will flash

Page 15 - D Control DIP Switches —

22Checking System Charge — Units are shipped withfull operating charge. If recharging is necessary:1. Insert thermometer bulb in insulating rubber sle

Page 16 - Operating Limits

23SUCTIONCOMPRESSORDISCHARGECOAXEXPANSIONVALVEFP2FP1LIQUIDLINEWATER INWATER OUTCONDENSATEOVERFLOW(CO)AIR COILFREEZEPROTECTIONWATERCOILPROTECTIONTHERMI

Page 17 - Flushing —

24Table 22 — TroubleshootingLEGENDRV — Reversing ValveFAULT HEATING COOLING POSSIBLE CAUSE SOLUTIONMain Power ProblemsX X Green Status LED Off Check l

Page 18 - Antifreeze —

25Table 22 — Troubleshooting (cont)LEGENDRV — Reversing ValveFAULT HEATING COOLING POSSIBLE CAUSE SOLUTIONOnly Compressor RunsX X Thermostat wiring Ch

Page 19

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 1

Page 20

CL-150RTGSTART-UP CHECKLISTCUSTOMER:___________________________ JOB NAME: _______________________________________MODEL NO.:___________________________

Page 21 - Condenser Cleaning —

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 1

Page 22 - Resistance (kOhm)

3INSPECT UNIT — To prepare the unit for installation, com-plete the procedures listed below:1. Compare the electrical data on the unit nameplate witho

Page 23 - Refrigerant Liquid Line Flow

4ACDBRETURNAIRSUPPLYAIRAIRFLOWSUPPLYAIRRETURNAIRTOPVIEWFRONTVIEWSIDEVIEWCONDENSATE DRAIN1" FPT5-13/169-13/16EFELECTRICAL &PIPE CHASEOUTSIDE A

Page 24 - Table 22 — Troubleshooting

5CAB14.00 (REF)14.00 (REF)STRUCTURAL SUPPORTCURB WALLROOF DECK/ROOFINGBASE PAN OF UNITFLASHING3-7/8"(TYP)REQUIREMENTSBY CONTRACTOR'SHEIGHT D

Page 25

6Step 4 — Mounting the Unit — For proper opera-tion, units must be mounted on a roof curb as shown in Fig. 3.Follow these guidelines when installing t

Page 26 - Ta b 5 a 5 a

7Step 7 — Electrical WiringAll field installed wiring, including the electrical ground,MUST comply with the National Electrical Code (NEC) aswell as a

Page 27 - TEMPERATURES

8SEE NOTE 5SEE NOTE 6NOTE 4SEENot UsedRStatusRVAL2AL1RelayAlarmACJW1LEDControl LogicMicroprocessorCGDCCOEH2EH1CO24VP3FP2FP1BRGTest PinsCP1ROGWYYBRNot

Page 28 - *97B0014N02*

9Table 3 — 50RTG Electrical DataLEGENDNOTE: Contact factory for oversize blower motor electrical data.Table 4 — 50RTG03 Blower Performance LEGENDNOTES

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Carrier aquazone 50RTG Instruction Manual

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