beautypg.com

Carrier 48HJ004---007 User Manual

Installation instructions, Warning, Safety considerations

background image

1

48HJ004---007

48HE003---006

Single---Package Rooftop Heating/Cooling

Standard and Low NOx Units

Installation Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS

1

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

INSTALLATION

1

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

Step 1--Provide Unit Support

2

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

ROOF CURB

2

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

SLAB MOUNT

2

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

ALTERNATE UNIT SUPPORT

2

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

Step 2--Field Fabricate Ductwork

2

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

Step 3--Install External Trap for Condensate Drain

2

. . . . . . .

Step 4--Rig and Place Unit

2

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

POSITIONING

4

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

Step 5 — Install Flue Hood

4

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

Step 6 — Install Gas Piping

4

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

Step 7 — Make Electrical Connections

8

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

FIELD POWER SUPPLY

8

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

FIELD CONTROL WIRING

8

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

HEAT ANTICIPATOR SETTINGS

8

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

Step 8 — Adjust Factory-Installed Options

17

. . . . . . . . . . .

COBRA™ ENERGY RECOVERY UNITS

17

. . . . . . .

HUMIDI-MIZER™ ADAPTIVE

DEHUMIDIFICATION SYSTEM

17

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

MANUAL OUTDOOR-AIR DAMPER

17

. . . . . . . . . .

CONVENIENCE OUTLET

17

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

NOVAR CONTROLS

17

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

PREMIERLINK™ CONTROL

19

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

OPTIONAL ECONOMI$ER IV AND

ECONOMI$ER2

22

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

ECONOMI$ER IV STANDARD SENSORS

23

. . . . . .

ECONOMI$ER IV CONTROL MODES

24

. . . . . . . . .

Step 9 — Adjust Evaporator-Fan Speed

29

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

PRE--START--UP

45

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

START--UP

45

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

SERVICE

50

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

TROUBLESHOOTING

58

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

START--UP CHECKLIST

63

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

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components.

Only trained and qualified service personnel should install, repair,
or service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions 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 precautions 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.
Recognize safety information. This is the safety--alert symbol

.

When you see this symbol on the furnace and in

instructions or manuals, be alert to the potential for personal
injury.
Understand the signal words DANGER, WARNING, and
CAUTION. These words are used with the safety--alert symbol.

DANGER identifies the most serious hazards which will result in

severe personal injury or death. WARNING signifies a hazard
which could result in personal injury or death. CAUTION is used

to identify unsafe practices which may result in minor personal
injury or product and property damage. NOTE is used to

highlight suggestions which will result in enhanced installation,

reliability, or operation.

ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal

injury or death.
Before performing service or maintenance operations

on unit, turn off main power switch to unit and install

lockout tag. Ensure electrical service to rooftop unit

agrees with voltage and amperage listed on the unit

rating plate.

!

WARNING

This manual is related to the following products: