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.
4
LEGEND
AFUE—Annual Fuel Utilization Efficiency
NOTE: Before purchasing this appliance, read important energy cost and efficiency information available from your retailer.
NOTE: Tested in compliance with AHRI 270 but not listed with AHRI.
AHRI
*
Capacities
Cooling Capacities and Efficiencies
*. Air Conditioning, Heating & Refrigeration Institute.
UNIT SIZE
NOMINAL
TONS
STANDARD
CFM
COOLING
CAPACITY
†
†. Rated in accordance with U.S. Government DOE Department of Energy) test procedures and/or AHRI Standards 210/240.
EER2
‡
‡. At “A” conditions-80°F (26.7°C) indoor db/67°F (19.4°C) indoor wb & 95°F (35°C) outdoor db.
SEER2
**
**. Rated in accordance with AHRI Standard 270.
Notes:
1. Ratings are net values, reflecting the effects of circulating fan heat.
Ratings are based on:
Cooling Standard: 80°F (26.7°C) db, 67°F wb (19.4°C) indoor entering-air temperature and 95°F db (35°C) outdoor entering-air temperature.
2. Before purchasing this appliance, read important energy cost and efficiency information available from your retailer.
LEGEND
dB-Sound Levels (decibels)
db—Dry Bulb
SEER—Seasonal Energy Efficiency Ratio
wb—Wet Bulb
COP-Coefficient of Performance
24 2 750 22800 10.6 13.4
30 2.5 950 28000 10.6 13.4
36 3 1150 33800 10.6 13.4
42 3.5 1350 39000 10.6 13.4
48 4 1600 47000 10.6 13.4
60 5 1750 10.6 13.4
Gas Heating Capacities and Efficiencies, Single and Three Phase Models
Unit Size Heating Input (Btuh) Output Capacity (Btuh) Temperature Rise Range °F (°C) AFUE (%)
24040
30040
45,000 37,000
25-55
(14-31)
81.0
24060
30060
36060
42060
60,000 49,000
25-55
(14-31)
81.0
42090
48090
60090
89,000 73,000
35-65
(19-36)
81.0
A-Weighted Sound Power Level
UNIT SIZE
STANDARD
RATING (dBA)
TYPICAL OCTAVE BAND SPECTRUM (dBA without tone adjustment)
125 250 500 1000 2000 4000 8000
24 70.7 59.4 58.5 58.3 60.4 56.7 52.6 46.9
30 73.4 53.8 59.9 62.3 64.0 61.4 53.8 45.6
36 74.8 67.1 60.3 64.3 63.8 61.9 57.1 50.8
42 74.9 62.5 63.1 63.7 65.5 61.5 57.5 53.5
48 75.4 64.1 61.0 65.5 63.7 61.8 60.1 56.1
60