Table Of Contents - Payne PY3G Series Product Data

High and Low Pressure Switches provide 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. Copper fin coils and pre- -coated fin coils
are available from the factory by special order. These coils are
recommended in applications where aluminum fins are likely to be
damaged due to corrosion. They are ideal for seacoast applications.
Low sound ratings ensure a quiet indoor and outdoor
environment with sound ratings as low as 75dBA.
Easy to service cabinets provide easy single- -panel accessibility to
serviceable components during maintenance and installation. The
basepan with integrated drain pan provides easy ground level
installation with or without a mounting pad. Convenient handholds
are provided to manipulate the unit on the jobsite. 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.

TABLE OF CONTENTS

Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model Number Nomenclature
ARI Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . .
Base Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . .
Accessory Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . .
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Wiring Schematics . . . . . . . . . . . . . . . . . . . . .
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . .
1---2
. . . . . . . . . . . . . . . . . . . . . . . 3
4
5---6
7
9---10
11
12
13---25
26
27
28
29---31
32
33---34
Standard 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
Conditioning Engineers 62.2.) The sloped drain pan minimizes
standing water in the drain. An external drain is provided.
2
Air