Carrier 50RTP03-20 specifications Contents, Safety Considerations, with PURON Refrigerant R-410A

AQUAZONE™ 50RTP03-20 Rooftop Water Source Heat Pumps

with PURON® Refrigerant (R-410A)

Installation, Start-Up, and

Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . .1,2

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-34

Step 1 — Check Jobsite . . . . . . . . . . . . . . . . . . . . . . . . 2

Step 2 — Check Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

•STORAGE

•PROTECTION

•INSPECT UNIT

Step 3 — Locate Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Step 4 — Mount the Unit . . . . . . . . . . . . . . . . . . . . . . . . . 8 Step 5 — Install Condensate Drain . . . . . . . . . . . . . . . 8 Step 6 — Make Piping Connections . . . . . . . . . . . . . . 8

•WATER LOOP APPLICATIONS

•GROUND-WATER APPLICATIONS

•GROUND-LOOP APPLICATIONS

Step 7 — Connect Electrical Wiring . . . . . . . . . . . . . . 9

•SUPPLY VOLTAGE

•208-VOLT OPERATION

•BLOWER SELECTION

Step 8 — Connect Low Voltage Wiring . . . . . . . . . . 34

•THERMOSTAT CONNECTIONS

•WATER FREEZE PROTECTION

•AIR COIL FREEZE PROTECTION

•ACCESSORY CONNECTIONS

•WATER SOLENOID VALVES

PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 System Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

FIELD SELECTABLE INPUTS . . . . . . . . . . . . . . . .35,36

Complete C Control Jumper Settings. . . . . . . . . . . 35

Complete C Control DIP Switches. . . . . . . . . . . . . . 35

Deluxe D Control Jumper Settings . . . . . . . . . . . . . 35

Deluxe D Control DIP Switches . . . . . . . . . . . . . . . . 35

Deluxe D Control Accessory Relay

Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Water Valve (Slow Opening) . . . . . . . . . . . . . . . . . . . 36

Outside-Air Damper (OAD) . . . . . . . . . . . . . . . . . . . . 36

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-40 Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Scroll Compressor Rotation. . . . . . . . . . . . . . . . . . . . . 37 Unit Start-Up Cooling Mode . . . . . . . . . . . . . . . . . . . . . 37 Unit Start-Up Heating Mode . . . . . . . . . . . . . . . . . . . . . 37 Unit Start-Up with WHSP Open Controls . . . . . . . . 38 Flow Regulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 System Claening and Flushing . . . . . . . . . . . . . . . . . . 39 Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Cooling Tower/Boiler Systems . . . . . . . . . . . . . . . . . . 40

Ground Coupled, Closed Loop and Plateframe Heat Exchanger Well Systems . . . . . . . . . . . . . . . . 40

OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40-43 Power Up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Page

Units with Aquazone™ Complete C Control . . . . . 40 Units with Aquazone Deluxe D Control . . . . . . . . . . 40 Units with WSHP Open Protocol . . . . . . . . . . . . . . . . 40

SYSTEM TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43-45

Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Retry Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Aquazone Deluxe D Control LED Indicators . . . . . 45

WSHP Open Test Mode. . . . . . . . . . . . . . . . . . . . . . . . . . 45

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45,46

Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Water Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Condensate Drain Pans . . . . . . . . . . . . . . . . . . . . . . . . . 45

Refrigerant System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Condensate Drain Cleaning . . . . . . . . . . . . . . . . . . . . . 45

Air Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Condenser Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Checking System Charge . . . . . . . . . . . . . . . . . . . . . . . 46

Refrigerant Charging. . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Air Coil Fan Motor Removal . . . . . . . . . . . . . . . . . . . . . 46

Replacing the WSHP Open Controller’s

Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 47-49

Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Control Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

APPENDIX A — WSHP OPEN SCREEN CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . 50-55

START-UP CHECKLIST . . . . . . . . . . . . . . . . . . CL-1, CL-2

IMPORTANT: Read the entire instruction manual before starting installation.

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.

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

Catalog No. 04-53500070-01 Printed in U.S.A. Form 50RTP-1SI Pg 1 7-10 Replaces: New