Carrier AQUAZONE 50HQL072-120 User Manual

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500034-01 Printed in U.S.A. Form 50H,V-10SI Pg 1 7-07 Replaces: 50H,V-9SI
Book 1 4
Ta b 5 a 5 a
Installation, Start-Up, and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . .1,2
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
Step 1 — Check Jobsite . . . . . . . . . . . . . . . . . . . . . . . . 2
Step 2 — Check Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
• STORAGE
•PROTECTION
•INSPECT UNIT
Step 3 — Location of Unit . . . . . . . . . . . . . . . . . . . . . . . 10
Step 4 — Mounting the Unit . . . . . . . . . . . . . . . . . . . . . 10
• HORIZONTAL UNITS
• VERTICAL UNITS
Step 5 — Duct System . . . . . . . . . . . . . . . . . . . . . . . . . . 10
• SO U ND AT TE N U AT I ON
• EXISTING DUCT SYSTEM
Step 6 — Condensate Drain . . . . . . . . . . . . . . . . . . . . . 11
• HORIZONTAL UNITS
• VERTICAL UNITS
• VENTING
Step 7 — Piping Connections . . . . . . . . . . . . . . . . . . . 11
• WATER LOOP APPLICATIONS
• GROUND-LOOP APPLICATIONS
• GROUND-WATER APPLICATIONS
Step 8 — Field Power Supply Wiring . . . . . . . . . . . . 12
• POWER CONNECTION
• SUPPLY VOLTAGE
• EXTERNAL LOOP POWER CONNECTION
• 208-VOLT OPERATION
Step 9 — Field Control Wiring . . . . . . . . . . . . . . . . . . . 14
• THERMOSTAT CONNECTIONS
• WATER FREEZE PROTECTION
• AIR COIL FREEZE PROTECTION
• ACCESSORY CONNECTIONS
• WATER SOLENOID VALVES
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-30
System Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Airflow and External Static Pressure . . . . . . . . . . . 24
FIELD SELECTABLE INPUTS . . . . . . . . . . . . . . . 30-33
Complete C Control Jumper Settings. . . . . . . . . . . 30
Complete C Control DIP Switches. . . . . . . . . . . . . . 30
Deluxe D Control Jumper Settings . . . . . . . . . . . . . 30
Deluxe D Control DIP Switches . . . . . . . . . . . . . . . . 30
Units with Modulating Hot Water Reheat
(HWR) Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Deluxe D Control Accessory Relay
Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33,34
Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Start Up System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Scroll Compressor Rotation. . . . . . . . . . . . . . . . . . . . . 33
Unit Start-Up Cooling Mode . . . . . . . . . . . . . . . . . . . . . 33
Unit Start-Up Heating Mode . . . . . . . . . . . . . . . . . . . . . 33
Page
Flow Regulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Cooling Tower/Boiler Systems . . . . . . . . . . . . . . . . . . 34
Ground Coupled, Closed Loop and Plateframe
Heat Exchanger Well Systems . . . . . . . . . . . . . . . . 34
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35,36
Power Up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Units with Aquazone Complete C Control . . . . . . . 35
Units with Aquazone Deluxe D Control . . . . . . . . . . 35
Units with HWR Option. . . . . . . . . . . . . . . . . . . . . . . . . . 35
SYSTEM TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36,37
Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Retry Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Aquazone Deluxe D Control LED Indicators . . . . . 36
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37,38
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Water Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Condensate Drain Pans . . . . . . . . . . . . . . . . . . . . . . . . . 37
Refrigerant System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Condensate Drain Cleaning . . . . . . . . . . . . . . . . . . . . . 37
Air Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Condenser Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Checking System Charge . . . . . . . . . . . . . . . . . . . . . . . 38
Refrigerant Charging. . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Air Coil Fan Motor Removal . . . . . . . . . . . . . . . . . . . . . 38
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 39-41
Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Control Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
50HQL,VQL 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.
AQUAZONE™
50HQL072-120
50VQL080-300
Water Source Heat Pump Units

Carrier AQUAZONE 50HQL072-120 Specifications

General

Cooling Capacity	72000 BTU/h
SEER	16
Refrigerant	R-410A
Frequency	60 Hz
HSPF	9.0
Voltage	208/230V

Summary

SAFETY CONSIDERATIONS

General Safety Guidelines

General safety precautions for installation, service, and operation.

Electrical Shock Warning

Warning about the dangers of electrical shock and necessary precautions.

Operational Cautions

INSTALLATION

Step 3 - Location of Unit

Guidelines for selecting an appropriate installation location for the WSHP.

Step 4 - Mounting the Unit

Instructions for physically mounting horizontal and vertical units.

Step 6 - Condensate Drain

Instructions for properly installing and trapping condensate drain lines.

Step 7 - Piping Connections

Guidelines for connecting water piping for different application types.

Step 8 - Field Power Supply Wiring

Procedures for safely connecting electrical power supply to the unit.

Step 9 - Field Control Wiring

Instructions for wiring thermostats, sensors, and accessory controls.

INSPECTION

Inspect Unit Before Installation

PRE-START-UP

System Checkout Procedure

Comprehensive checks to perform before unit start-up.

START-UP

Start Up System Steps

Scroll Compressor Rotation Check

How to verify correct compressor rotation direction.

Unit Start-Up Cooling Mode

Procedures for starting the unit in cooling mode and checking parameters.

Unit Start-Up Heating Mode

Procedures for starting the unit in heating mode and checking parameters.

Antifreeze Guidelines

OPERATION

Power Up Mode

Initial unit operation sequence and safety checks.

System Test Mode

Test Mode Procedures

Deluxe D Control LED Indicators

SERVICE

Refrigerant System Service

Checking System Charge

Steps to check and verify the unit's refrigerant charge.

Refrigerant Charging Procedure

Procedures for adding refrigerant to the system.

TROUBLESHOOTING

Troubleshooting Table

Common faults, causes, and solutions for unit operation issues.

Troubleshooting Table (Continued)

Continued troubleshooting guide for various unit faults.

START-UP CHECKLIST

I. PRE-START-UP Checklist

Checklist items for verifying installation before starting operation.

II. START-UP Checklist

Checklist items for verifying operation after start-up.