Carrier AQUAZONE 50VQL080-300 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 50VQL080-300 Specifications

General

Model Number	50VQL080-300
Category	Heat Pump
Coefficient of Performance (COP)	3.3
Refrigerant	R410A
Operating Temperature Range (Cooling)	18°C to 46°C
Operating Temperature Range (Heating)	-15°C to 24°C

Summary

SAFETY CONSIDERATIONS

GENERAL INFORMATION

INSTALLATION PROCEDURES

Jobsite and Unit Inspection

Verifies installation readiness, checks unit against shipping info, and inspects for damage.

Location, Mounting, and Ducting

Guidelines for selecting an indoor location, mounting units, and connecting duct systems.

Piping and Wiring Connections

Covers condensate drain, piping connections, and field power supply and control wiring.

UNIT OPERATION MODES

Power Up and Standby Operation

Procedures for initial unit power-up and operation in standby mode.

Aquazone Control System Operation

Details operation modes for Complete C and Deluxe D controls, including cooling and heating stages.

Hot Water Reheat (HWR) Operation

Explains operating modes for units with HWR, including cooling, heating, and reheat functions.

SYSTEM TEST AND DIAGNOSTICS

System Test Mode Procedures

How to enter Test mode for checking control operation and viewing fault codes.

Deluxe D Control LED Indicators

Explains the function of the Status, Test, and Fault LEDs on the Deluxe D control board.

PERIODIC SERVICE AND MAINTENANCE

Filter and Water Coil Maintenance

Instructions for filter inspection, replacement, and water coil cleaning.

Condensate System Maintenance

Covers cleaning condensate drain pans and drain lines for proper operation.

Refrigerant System and Coil Cleaning

Details servicing the refrigerant system and cleaning air and condenser coils.

System Charge Check and Refrigerant Charging

Procedures for checking system charge and safely performing refrigerant charging.

TROUBLESHOOTING GUIDE

Thermistor and Control Sensor Functions

Identifies thermistors and sensors used for freeze protection and control.

Troubleshooting Fault Codes and Issues

Guides for diagnosing and resolving common faults like power, pressure, and airflow issues.

START-UP CHECKLIST AND ANALYSIS

Pre-Start-Up Verification Steps

Confirms voltage, wiring, water connections, pump, condensate, and filter status.

Unit Start-Up Procedures and Data

Verifies fan operation, compressor rotation, and records operational data.