Carrier AQUAZONE 50HQP072-120 User Manual

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500077-01 Printed in U.S.A. Form 50HQP-C1SI Pg 1 11-10 Replaces: New
Installation, Start-Up, and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . .1,2
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Step 1 — Check Jobsite . . . . . . . . . . . . . . . . . . . . . . . . 2
Step 2 — Check Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
• STORAGE
•PROTECTION
•INSPECT UNIT
Step 3 — Locate Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Step 4 — Mount Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Step 5 — Install Duct System. . . . . . . . . . . . . . . . . . . . . 5
• SO U ND AT TE N U AT I ON
• EXISTING DUCT SYSTEM
Step 6 — Install Condensate Piping Drain. . . . . . . . 6
•INSTALLATION
• VENTING
Step 7 — Field Convert Air Discharge . . . . . . . . . . . . 6
Step 8 — Install Piping Connections . . . . . . . . . . . . . 7
• WATER LOOP APPLICATIONS
• GROUND-LOOP APPLICATIONS
• GROUND-WATER APPLICATIONS
Step 9 — Install Field Power Supply Wiring . . . . . . 8
• POWER CONNECTION
• SUPPLY VOLTAGE
• EXTERNAL LOOP POWER CONNECTION
• 420-VOLT OPERATION
Step 10 — Install Field Control Wiring. . . . . . . . . . . 15
• THERMOSTAT CONNECTIONS
• WATER FREEZE PROTECTION
• AIR COIL FREEZE PROTECTION
• ACCESSORY CONNECTIONS
• WATER SOLENOID VALVES
PRE-START-UP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-20
System Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Airflow and External Static Pressure . . . . . . . . . . . 16
FIELD SELECTABLE INPUTS . . . . . . . . . . . . . . . 20-22
Complete C Control Jumper Settings. . . . . . . . . . . 20
Complete C Control DIP Switches. . . . . . . . . . . . . . 20
Deluxe D Control Jumper Settings . . . . . . . . . . . . . 20
Deluxe D Control DIP Switches . . . . . . . . . . . . . . . . 21
Deluxe D Control Accessory Relay
Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-24
Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Air Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Start Up System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Scroll Compressor Rotation. . . . . . . . . . . . . . . . . . . . . 22
Unit Start-Up in Cooling Mode. . . . . . . . . . . . . . . . . . . 22
Unit Start-Up in Heating Mode. . . . . . . . . . . . . . . . . . . 23
Flow Regulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Page
Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Cooling Tower/Boiler Systems . . . . . . . . . . . . . . . . . . 24
Ground Coupled, Closed Loop and Plateframe
Heat Exchanger Well Systems . . . . . . . . . . . . . . . . 24
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24,25
Power Up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Units with Aquazone Complete C Control . . . . . . . 24
Units with Aquazone Deluxe D Control . . . . . . . . . . 24
SYSTEM TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25,26
Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Retry Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Aquazone Deluxe D Control LED Indicators . . . . . 25
SERVICE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-29
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Water Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Condensate Drain Pans . . . . . . . . . . . . . . . . . . . . . . . . . 27
Refrigerant System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Condensate Drain Cleaning . . . . . . . . . . . . . . . . . . . . . 27
Air Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Condenser Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Compressor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Fan Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Air Coil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Checking System Charge . . . . . . . . . . . . . . . . . . . . . . . 28
Refrigerant Charging. . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Air Coil Fan Motor Removal . . . . . . . . . . . . . . . . . . . . . 28
Blower Fan Sheaves . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Blower Fan Performance Adjustment . . . . . . . . . . . 29
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 30-32
Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Control Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
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
IMPORTANT: Read the entire instruction manual before
starting installation.
AQUAZONE™
50HQP072-120
Horizontal Water Source Heat Pumps
with PURON
®
Refrigerant (R-410A)
50 Hz

Carrier AQUAZONE 50HQP072-120 Specifications

General

Cooling Capacity	72000 BTU/h
Coefficient of Performance (COP)	3.2
Refrigerant	R-410A
Voltage	208/230V
Phase	3
Compressor Type	Scroll

Summary

SAFETY CONSIDERATIONS

General Safety Precautions

Covers electrical safety, refrigerant handling, and general hazard warnings.

Installation Code Compliance

Stresses adherence to all applicable codes for proper installation.

GENERAL INFORMATION

Unit Description

Explains that units are horizontal WSHPs designed for year-round cooling and heating.

Contractor Responsibilities

Outlines the installing contractor's responsibility for code compliance.

INSTALLATION PROCEDURES

Jobsite Preparation and Unit Inspection

Pre-installation checks including jobsite readiness, unit receipt, storage, and protection.

Unit Location and Mounting

Guidelines for selecting the unit's installation site and securely mounting it.

Ductwork, Piping, and Drain Connections

Installation of ductwork, water piping, and condensate drain systems.

Air Discharge Field Conversion

Instructions for converting the unit's air discharge configuration.

Field Electrical Wiring Installation

Detailed instructions for installing power supply and control wiring.

PRE-START-UP CHECKS

System Checkout Checklist

A comprehensive list of critical items to verify before initial unit operation.

Airflow, Sheave, and Belt Adjustments

Procedures for setting airflow, fan sheaves, and belt tension.

START-UP PROCEDURES

Operating Limits and Coil Cleaning

Defines acceptable unit operating conditions and air coil cleaning steps.

Compressor Rotation and Mode Initiation

Verifies compressor rotation and guides start-up in cooling and heating modes.

Flow Regulation and System Flushing

Methods for adjusting water flow rates and flushing the system.

OPERATION MODES

Power-Up Sequence and Control Logic

Explains unit behavior on power-up and operational modes for different control systems.

SYSTEM TESTING

Test Mode and Diagnostic Indicators

Procedures for using Test Mode and interpreting control system LED status codes.

SERVICE AND MAINTENANCE

Filter and Coil Maintenance

Routine maintenance for filters, water coils, condensate drains, and air coils.

Condenser and Refrigerant System Checks

Guidance on cleaning condensers and performing initial refrigerant system checks.

Motor, Sheave, and Belt Maintenance

Procedures for servicing fan motors, sheaves, belts, and refrigerant charging.

Fan Motor Removal and Sheave Adjustment

Detailed steps for removing fan motors and adjusting blower fan sheaves.

TROUBLESHOOTING

Control Sensor Diagnostics

Troubleshooting steps involving thermistors and control sensors for freeze protection.

Fault Code Interpretation

Explains how to read fault codes and their corresponding solutions.