Carrier 50PG03-07 installation instructions Table Of Contents, Safety Considerations

50PG03---07

Single Package Rooftop Units

Electric Cooling with PURONR (R---410A) Refrigerant and COMFORTLinkt 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.

!WARNING

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.

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.