Specification

2
Thermostat controls
Time Guardr II anti--short cycle protection circuitry. If a
non--corporate thermostat without anti--short cycle protection is
used the Time Guard II field-- installed anti-- short cycle kit is
recommended.
Refrigerant system is designed to provide dependability. Liquid
filter driers are used to promote clean, unrestricted operation. Each
unit leaves the factory with a full refrigerant charge. Refrigerant
service connections make checking operating pressures easier.
High Pressure Switches provides added reliability for the
compressor.
Indoor and Outdoor coils are computer--designed for optimum
heat transfer and efficiency. The indoor coil is fabricated from
copper tube and aluminum fins and is located inside the unit for
protection against damage. The outdoor coil is internally mounted
on the top tier of the unit.
Low sound ratings ensure a quiet indoor and outdoor
environment with sound ratings as low as 73dBA.
Easy to service cabinets provide easy 3--panel accessibility to
serviceable components during maintenance and installation. The
basepan with integrated drain pan provides easy ground level
installation with mounting pad. A nesting feature ensures a positive
basepan to roof curb seal when the unit is roof mounted. A
convenient 3/4-- in. (19.05 mm) wide perimeter flange makes frame
mounting on a rooftop easy.
Standard horizontal metal duct covers with insulation come
with the unit and cover the horizontal duct openings. These can be
left in place if the units are converted to downflow.
Integrated Gas Control (IGC) board provides safe and efficient
control of heating and simplifies trouble--shooting through its
built-- in diagnostic function.
Cabinets are constructed of heavyduty, phosphated, zinc--coated
prepainted steel capable of withstanding 500 hours in salt spray.
Interior surfaces of the evaporator/heat exchanger compartment are
insulated with cleanable semi--rigid insulation board, which keeps
the conditioned air from being affected by the outdoor ambient
temperature and provides improved indoor air quality. (Conforms
to American Society of Heating, Refrigeration and Air
Conditioning Engineers 62.2.) The sloped drain pan minimizes
standing water in the drain. An external drain is provided.
TABLE OF CONTENTS
Features/Benefits 1.................................
Model Number Nomenclature 3.......................
AHRI Capacities 4..................................
Physical Data 5.....................................
Options and Accessories 7...........................
Base Unit Dimensions 9---10.........................
Accessory Dimensions 11............................
Selection Procedure 12..............................
Performance Data 13 --- 20............................
Typical Piping and Wiring 46..........................
Application Data 47.................................
Electrical Data 48...................................
Typical Wiring Schematics 49---54.....................
Controls 55........................................
Guide Specifications 56--- 57..........................
PY4G -- -- B