Carrier 50PG03-07 - Manual

50PG03 --- 07

Single Package Rooftop Units

Electric Cooling with PURON

R

(R --- 410A)

Refrigerant and

COMFORT

Link

t

Controls

Installation Instructions

IMPORTANT

: This installation instruction contains basic unit

installation information including installation of field control
devices. For information on unit start--up, service, and operation,
refer to the unit Controls, Start-- Up, Operation, Service, and
Troubleshooting Instructions also enclosed in the unit literature
packet.

TABLE OF CONTENTS

SAFETY CONSIDERATIONS

1

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

INSTALLATION

4

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

Step 1 -- Provide unit Support

4

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

Step 2 -- Rig and Place Unit

4

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

Step 3 -- Field Fabricate Ductwork

7

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

Step 4 -- Make Unit Duct Connections

7

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

Step 5 -- Install External Trap for Condensate Drain

7

. . . . . . . .

Step 6 -- Make Electrical Connections

8

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

Step 7 -- Install Outdoor Air Hoods (Units With

Economizer

22

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

Step 8 -- Install All Accessories

22

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

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 the 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.

Recognize safety information. This is the safety--alert symbol

.

When you see this symbol on the unit 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.

!

WARNING

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could cause personal

injury, death and/or equipment damage.
Puron (R--410a) refrigerant systems operate at higher

pressures than standard R--22 systems. Do not use R--22

service equipment or components on Puron refrigerant

equipment.

!

WARNING

FIRE, EXPLOSION HAZARD

Failure to follow this warning could result in personal

injury, death and/or property damage.
1. Improper installation, adjustment, alteration, service,

or maintenance can cause property damage, personal

injury, or loss of life. Refer to the User’s Information

Manual provided with this unit for more details.

2. Do not store or use gasoline or other flammable

vapors and liquids in the vicinity of this or any other

appliance.

!

WARNING

IMPORTANT

: Units have high ambient operating limits. If limits

are exceeded, the units will automatically lock the compressor out
of operation. Manual reset will be required to restart the
compressor.