The focus of this manual is to provide basic information on service procedures, safety, troubleshooting, cleaning, and component replacement for service technicians. It is intended for use only by HVAC service technicians who have successfully completed instruction and received Type I Certification 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 install, operate, adjust, repair, or dismantle any equipment should be made until the manufacturer's instructions are read and thoroughly understood by the service technician. Even equipment that seems familiar may have specific 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 cooling. 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 manual are the 52SC (Cooling Only model); the 52SE (Cooling with Electric Heat model); and the 52SQ (Cooling, Electric Heat, and Heat Pump model).
Knowing which model is being serviced will help determine 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 information plate also lists voltage ranges and other important 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).
SUMMARY OF DANGERS, WARNINGS, AND CAUTIONS
The terms DANGER, WARNING, and CAUTION have specific meanings that identify the degree of hazard. Typically in the HVAC industry, these specific meanings are:
DANGER
There is an immediate hazard, which WILL result in severe personal injury or death.
WARNING
Hazards or unsafe practices, which COULD result in severe personal injury or death
CAUTION
Potential hazards or unsafe practices, which COULD result in minor personal injury or equipment damage.
