Carrier 50TFQ008-012 specifications Contents, Safety Considerations, Installation

50TFQ008-012 Single-Package Rooftop Heat Pump Units

Installation, Start-Up and

Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . .1

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-43 Step 1— Provide Unit Support . . . . . . . . . . . . . . . . . . . . . . .1

•ROOF CURB

•SLAB MOUNT

•ALTERNATE UNIT SUPPORT

Step 2 — Field Fabricate Ductwork		3
Step 3	— Install Condensate Drain Line
and External Trap		3
Step 4	— Rig and Place Unit	3
• POSITIONING
Step 5	— Make Electrical Connections	7

•FIELD POWER SUPPLY

•FIELD CONTROL WIRING

•DEFROST BOARD

•HEAT ANTICIPATOR SETTINGS

Step 6 — Adjust Factory-Installed Options . . . . . . . . .12

•DISCONNECT SWITCH

•CONVENIENCE OUTLET

•NOVAR CONTROLS

•MANUAL OUTDOOR-AIR DAMPER

•PREMIERLINK™ CONTROL

•OPTIONAL ECONOMI$ER IV AND ECONOMI$ER2

•ECONOMI$ER IV STANDARD SENSORS

•ECONOMI$ER IV CONTROL MODES

Step 7 — Adjust Indoor-Fan Speed . . . . . . . . . . . . . . . . .25 PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44 START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44-47 SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47-49 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49-53 INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54 START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . CL-1

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.

Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for unbrazing operations. Have fire extinguisher available for all brazing operations.

Before performing service or maintenance operations on unit, turn off main power switch to unit and install lockout tag. Ensure voltage listed on unit data plate agrees with electrical supply provided for the unit. Electrical shock could cause personal injury.

INSTALLATION

Unit is shipped in the vertical configuration. To convert to horizontal configuration, remove side duct opening covers. Us- ing the same screws, install covers on vertical duct openings with the insulation-side down. Seals around duct openings must be tight.

Step 1 — Provide Unit Support

ROOF CURB — Assemble and install the accessory roof curb in accordance with instructions shipped with the curb. See Fig. 1. Install insulation, cant strips, roofing felt, and counter flashing as shown. Ductwork must be attached to curb. If electric or control power will be routed through the basepan, use the proper accessory kit listed in Fig. 1, available from your local distributor. Attach the accessory thru-the-bottom service connections to the basepan in accordance with the accessory installation instructions. Connections must be installed before the unit is set on the roof curb.

IMPORTANT: The gasketing of the unit to the roof curb is critical for a water-tight seal. Install gasket supplied with the roof curb as shown in Fig. 1. Improperly applied gasket can also result in air leaks and poor unit performance.

The roof curb should be level. Unit leveling tolerances are shown in Fig. 2. This is necessary for the unit drain to function properly. Refer to Accessory Roof Curb Installation Instruc- tions for additional information as required.

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

Book	1	4	Catalog No. 04-53500019-01	Printed in U.S.A.	Form 50TFQ-9SI	Pg 1	9-05	Replaces: 50TFQ-7SI
Tab	5a	5a