Safety Considerations

User Information Manual

674B

SINGLE-PACKAGED GAS HEAT/ELECTRIC HEAT PUMP UNIT WITH

PURON® (R-410A) REFRIGERANT

NOTE: Read the entire instruction manual before starting the installation.

Note to Installer: This manual should be left with the equipment user.

Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified personnel should install, repair, or service air-conditioning equipment.

Untrained personnel can perform basic maintenance functions of cleaning coils and 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 extinguisher available for all brazing operations.

WARNING: Improper installation, adjustment, alter- ation, service, maintenance, or use can cause carbon monoxide poisoning, fire, or an explosion which could result in personal injury or unit damage. Consult a qualified installer, service agency, or gas supplier for information or assistance. The qualified installer or agency must use only factory-authorized kits or accesso- ries when modifying this product.

WARNING: Before performing service or maintenance operations on unit, turn off gas supply to unit. Then turn off unit main power switch. Electrical shock or explosion could cause serious injury or death.

WARNING: Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. Failure to follow this warning could result in fire, serious injury, or death.

Cancels: New	OM10–21
	1–04

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 would 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.

These instructions cover minimum requirements and conform to existing national standards and safety codes. In some instances, these instructions exceed certain local codes and ordinances, especially those that may not have kept up with changing residen- tial construction practices. We require these instructions as a minimum for a safe installation.

UNIT INTRODUCTION

This 674B unit is a small packaged gas heat/electric heat pump system that can utilize both the efficiency of heat pump heating and the comfort of gas heating. The system will optimize for ideal heating, depending on several factors. This unit uses Puron®, the ozone friendly refrigerant for cooling and heat pump heating.

C99088

WARNING: Do not use this unit if any part has been under water. Immediately call a qualified service techni- cian to inspect the unit and to replace any part of the control system which has been under water. Failure to follow this warning could result in electrical shock, fire, serious injury, or death.

Recognize safety information. This is the safety-alert symbol . When you see this symbol in instructions or manuals, be alert to the potential for personal injury.

Understand the signal words DANGER, WARNING, CAUTION, and NOTE. These words are used with the safety-alert symbol. DANGER identifies the most serious hazards which will result in

—1—

Fig. 1—Unit 674B

Starting or Shutting Unit Off

1.To start the unit:

a.Turn on the electrical and gas power supply to unit.

b.Select desired temperature on thermostat and set SYS- TEM switch or MODE control to desired mode.

2.To shut unit off:

NOTE: If the unit is being shut down because of a malfunction, call your dealer as soon as possible.

a.Set system SWITCH or MODE control to OFF.

b.Turn off the electrical power, install lock-out tag and shut off gas supply to unit.

User Information Manual