Carrier 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

• SOUND ATTENUATION

• 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