Carrier 52S manual Introduction, Summary of DANGERS, WARNINGS, and Cautions

52S

SERIES

INTRODUCTION

The focus of this manual is to provide basic information on service procedures, safety, troubleshooting, clean- ing, and component replacement for service technicians.

It is intended for use only by HVAC service tech- nicians who have successfully completed instruc- tion and received Type I Certi®cation from the U.S. Environmental Protection Agency.

The instructions in this manual are general in nature and are not to be substituted for installation and service instructions shipped with the unit. No attempt to in- stall, operate, adjust, repair, or dismantle any equipment should be made until the manufacturer's instructions are read and thoroughly understood by the service tech- nician. Even equipment that seems familiar may have speci®c model differences from year to year. Always review manufacturer's instructions.

The Model 52S packaged terminal air conditioner and heat pump units are self-contained for installation through the wall for individual room heating and cool- ing. The Model 52S polymer sleeve is permanently fastened to the wall; the unit chassis slides out of the sleeve to allow the service technician easy access. An accessory louvered rear grille may be mounted on the sleeve. Many accessories are offered to complement the unit's comfort control.

Before beginning any service procedures, it is important to check the unit model number. Even units that seem similar may have subtle differences that could affect service procedures. The 52S units covered in this book are the 52SC (Cooling Only model); the 52SE (Cooling with Electric Heat model); and the 52SQ (Cooling, Elec- tric Heat, and Heat Pump model).

Knowing which model is being serviced will help deter- mine if the unit is performing at optimum levels. The model number is located on the data information plate beneath the front panel of the unit. The data infor- mation plate also lists voltage ranges and other impor- tant electrical information about the unit. To access the data information plate, remove the front panel of unit by grasping panel on each side and gently pulling upward and out (Figure 1). See Figure 2 for model num- ber nomenclature and Figure 3 for a sample data infor- mation plate.

SUMMARY OF DANGERS, WARNINGS, AND CAUTIONS

The terms DANGER, WARNING, and CAUTION have speci®c meanings that identify the degree of haz- ard. Typically in the HVAC industry, these speci®c meanings are:

There is an immediate hazard which WILL result in severe personal injury or death.

Hazards or unsafe practices which COULD result in severe personal injury or death.

Potential hazards or unsafe practices which COULD result in minor personal injury or equipment damage.

FIGURE 1 Ð REMOVING FRONT PANEL

2