User Guide
Table Of Contents
- Product Data
- Features/Benefits
- Model Number Nomenclature
- AHRI Capacities
- Unit Dimensions
- Unit Dimensions
- 36-60
- Accessory Dimensions
- 1. Roof curb must be set up for unit being installed.
- 2. Seal strip must be applied, as required, to unit being installed.
- 3. Roof curb is made of 16-gauge steel.
- 4. Attach ductwork to curb (flanges of duct rest on curb).
- 5. Insulated panels: 1-in. (25.4 mm) thick fiberglass 1 lb. density.
- Performance Data
- Application Data
- Electrical Data
- Connection Wiring Schematic 208/230-1-60
- Controls
- Operating Sequence
- 2. The normally open contacts of energized contactor (C) close and complete the circuit through compressor motor (COMP) to condenser (outdoor) fan motor (OFM). Both motors start instantly.
- 3. The set of normally open contacts on the interface fan board (IFB) are closed which energizes a circuit to the indoor fan motor (IFM).
- Guide Specifications
- Packaged Gas Heating/Electric Cooling Units Constant Volume Application
- HVAC Guide Specifications
- General
- Products
- Guide Specifications (Continued)
- 2. Compressor Start Kit (single phase units only):
- 3. Thermostat:
- 4. Crankcase Heater:
- 5. Economizer:
- 6. Filter Rack Kit:
- 7. Flat Roof Curb:
- 8. Flue Discharge Deflector
- 9. Low Ambient Package:
- 10. Manual Outdoor Air Damper:
- 11. Square-To-Round Duct Transitions (24-48 models):
- 12. Time Guard II
- 13. Low Pressure Switch Kit
577C--K Ultra Low NOx: Product Data
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
2
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 heavy duty, 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
Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Electrical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Connection Wiring Schematic 208/230-1-60 . . . . . . . . . . . . . . . . . . . . 27
Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32