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Carrier 48TFD008-014 Installation, Start-up And Service Instructions Manual

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48

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

Catalog No. 004-816 Printed in U.S.A. Form 48TF-C1SI Pg 1 1-01 Replaces: New

Book 1 4

Ta b 1 a 6 a

Installation, Start-Up and

Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS

. . . . . . . . . . . . . . . . . . . . . . 1

INSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-33

Step 1 — Provide Unit Support

. . . . . . . . . . . . . . . . . . .

1

•ROOF CURB

• SLAB MOUNT

Step 2 — Field Fabricate Ductwork

. . . . . . . . . . . . . . .

2

Step 3 — Install External Trap for

Condensate Drain

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Step 4 — Rig and Place Unit

. . . . . . . . . . . . . . . . . . . . . 2

• POSITIONING

Step 5 — Install Flue Hood

. . . . . . . . . . . . . . . . . . . . . . . 8

Step 6 — Install Gas Piping

. . . . . . . . . . . . . . . . . . . . . . 8

Step 7 — Make Electrical Connection

. . . . . . . . . . . . 8

• FIELD POWER SUPPLY

• FIELD CONTROL WIRING

• HEAT ANTICIPATOR SETTINGS

Step 8 — Adjust Factory-Installed Options

. . . . . . 11

• APOLLO CONTROL

• MANUAL OUTDOOR-AIR DAMPER

• OPTIONAL DURABLADE ECONOMIZER

• OPTIONAL ECONOMI$ER

Step 9 — Adjust Evaporator-Fan Speed

. . . . . . . . . 20

START-UP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34-36

SERVICE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-41

TROUBLESHOOTING

. . . . . . . . . . . . . . . . . . . . . . . . . 42-46

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 extinguishers available for all brazing operations.

INSTALLATION

Unit is shipped in the vertical discharge configuration. To

convert to horizontal configuration, remove screws from side

duct opening covers and remove covers. Using the same

screws, install covers on vertical duct openings with the insula-

tion side down. Seals around duct openings must be tight. See

Fig. 1.

Step 1 — Provide Unit Support

ROOF CURB — Assemble and install accessory roof curb in

accordance with instructions shipped with curb. See Fig. 2. In-

stall insulation, cant strips, roofing felt, and counter flashing as

shown. Ductwork must be attached to curb. If gas, electric

power or control power is to be routed through the curb, attach

the accessory thru-the-curb service connection plates to the

roof curb in accordance with the accessory installation instruc-

tions. Connection plates must be installed before unit is set in

roof curb.

Curb should be level. Unit leveling tolerances are shown in

Fig. 3. This is necessary for unit drain to function properly. Re-

fer to Accessory Roof Curb Installation Instructions for addi-

tional information as required.

Disconnect gas piping from unit when leak test-

ing at pressure greater than 3.4 kPa (

1

/

2

psig).

Pressures greater than 3.4 kPa (

1

/

2

psig) will

cause gas valve damage resulting in hazardous

condition. If gas valve is ever subjected to pres-

sure greater than 3.4 kPa (

1

/

2

psig), it must be

replaced before use. When pressure testing

field-supplied gas piping at pressures of 3.4 kPa

(

1

/

2

psig) or less, a unit connected to such piping

must be isolated by manually closing the gas

valve(s).

Before performing service or maintenance operations on

unit, turn off main power switch to unit. Electrical shock

could cause personal injury.

IMPORTANT: The gasketing of the unit to the roof curb

is critical for a watertight seal. Install gasket supplied

with the roof curb as shown in Fig. 2. Improperly

applied gasket can also result in air leaks and poor unit

performance.

48TFD008-014

48TFE008-014

48TFF008,012

Single-Package Rooftop Heating/Cooling Units

50 Hz