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.
15
Performance Data
48 Size
Evaporator Air
Condenser Entering Air Temperatures °F (°C)
75 (23.9) 85 (29.4) 95 (35) 105 (40.6) 115 (46.1) 125 (51.7)
CFM
EWB
°F(°C)
Capacity MBtuh
Total
Sys
KW**
Capacity MBtuh
Total
Sys
KW**
Capacity MBtuh
Total
Sys
KW**
Capacity MBtuh
Total
Sys
KW**
Capacity MBtuh
Total
Sys
KW**
Capacity MBtuh
Total
Sys
KW**
Total
Sens‡
Total
Sens‡
Total
Sens‡
Total
Sens‡
Total
Sens‡
Total
Sens‡
1400
57
(13.8)
45.45 45.45 3.10 42.83 42.83 3.46 40.16 40.16 3.89 37.26 37.26 4.36 33.52 33.52 4.82 29.80 29.80 5.37
62
(16.6)
47.27 42.17 3.13 44.15 40.29 3.49 41.03 38.39 3.91 37.61 36.29 4.36 33.57 33.57 4.83 29.84 29.84 5.37
63*
(17.2)
48.20 34.32 3.13 45.02 32.66 3.50 41.76 30.98 3.92 38.24 29.20 4.38 33.54 26.93 4.82 28.81 24.65 5.33
67
(19.4)
52.06 35.63 3.15 48.74 34.02 3.52 45.33 32.35 3.95 41.77 30.64 4.44 37.35 28.63 4.96 32.39 26.38 5.46
72
(22.2)
56.98 28.79 3.18 53.50 27.36 3.56 49.89 25.89 3.99 46.16 24.36 4.48 42.23 22.80 5.04 37.37 21.00 5.64
1550
57
(13.8)
47.02 47.02 3.17 44.27 44.27 3.54 41.50 41.50 3.96 38.53 38.53 4.44 34.79 34.79 4.92 30.91 30.91 5.46
62
(16.6)
48.16 44.46 3.17 45.01 42.51 3.55 41.85 40.45 3.97 38.60 38.60 4.44 34.83 34.83 4.92 30.95 30.95 5.46
63*
(17.2)
49.02 35.96 3.18 45.75 34.27 3.55 42.41 32.55 3.98 38.87 30.75 4.45 34.15 28.45 4.89 29.32 26.09 5.40
67
(19.4)
52.88 37.35 3.20 49.49 35.71 3.57 46.00 34.00 4.00 42.38 32.25 4.49 38.03 30.31 5.04 32.93 27.95 5.53
72
(22.2)
57.73 29.76 3.23 54.20 28.31 3.61 50.51 26.84 4.04 46.68 25.28 4.53 42.70 23.71 5.09 37.92 21.96 5.70
1800
57
(13.8)
49.14 49.14 3.25 46.25 46.25 3.63 43.34 43.34 4.06 40.29 40.29 4.55 36.55 36.55 5.07 32.46 32.46 5.60
62
(16.6)
49.49 47.88 3.25 46.34 46.34 3.63 43.39 43.39 4.06 40.34 40.34 4.55 36.60 36.60 5.07 32.49 32.49 5.61
63*
(17.2)
50.04 38.56 3.25 46.70 36.84 3.63 43.27 35.06 4.06 39.66 33.20 4.54 34.96 30.85 5.00 30.05 28.30 5.51
67
(19.4)
53.94 40.13 3.28 50.43 38.42 3.65 46.85 36.63 4.08 43.16 34.80 4.57 38.95 32.92 5.12 33.66 30.41 5.65
72
(22.2)
58.67 31.28 3.31 55.06 29.83 3.69 51.26 28.32 4.12 47.34 26.73 4.62 43.27 25.12 5.18 38.61 23.50 5.78