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.
20
30040
25 - 55
(14 - 31)
Low† Blue Alternate Heating
CFM 643 552 455 348 225 --- --- --- --- ---
BHP 0.09 0.10 0.11 0.11 0.11 --- --- --- --- ---
Gas Heat Rise (
o
F)
52 NA NA NA NA NA NA NA NA NA
Gas Heat Rise (
o
C)
29 NA NA NA NA NA NA NA NA NA
Med-Low‡ Pink
Heating
Alternate Cooling
CFM 817 744 673 597 516 431 325 190 --- ---
BHP 0.14 0.15 0.15 0.16 0.17 0.17 0.18 0.18 --- ---
Gas Heat Rise (
o
F)
41 45 50 NA NA NA NA NA NA NA
Gas Heat Rise (
o
C)
23 25 28 NA NA NA NA NA NA NA
Medium Red
Alternate Cooling
Alternate Heating
CFM 1159 1104 1045 990 937 878 821 759 693 618
BHP 0.31 0.32 0.33 0.33 0.34 0.35 0.36 0.37 0.37 0.38
Gas Heat Rise (
o
F)
29 30 32 34 36 38 41 44 48 54
Gas Heat Rise (
o
C)
16 17 18 19 20 21 23 25 27 30
Med-High** Orange
Cooling
Alternate Heating
CFM 1201 1147 1095 1037 987 934 877 818 755 671
BHP 0.34 0.35 0.36 0.37 0.37 0.38 0.39 0.40 0.41 0.40
Gas Heat Rise (
o
F)
28 29 31 32 34 36 38 41 44 50
Gas Heat Rise (
o
C)
15 16 17 18 19 20 21 23 25 28
High Black High Static Cooling Only
CFM 1291 1236 1181 1131 1080 1033 978 909 792 661
BHP 0.41 0.42 0.43 0.43 0.44 0.45 0.46 0.45 0.43 0.40
30060
25 - 55
(14 - 31)
Low† Blue
CFM 643 552 455 348 225 --- --- --- --- ---
BHP 0.09 0.10 0.11 0.11 0.11 --- --- --- --- ---
Gas Heat Rise (
o
F)
NA NA NA NA NA NA NA NA NA NA
Gas Heat Rise (
o
C)
NA NA NA NA NA NA NA NA NA NA
Med-Low Pink
Alternate Cooling
Alternate Heating
CFM 817 744 673 597 516 431 325 190 --- ---
BHP 0.14 0.15 0.15 0.16 0.17 0.17 0.18 0.18 --- ---
Gas Heat Rise (
o
F)
55 NA NA NA NA NA NA NA NA NA
Gas Heat Rise (
o
C)
30 NA NA NA NA NA NA NA NA NA
Medium‡ Red
Heating
Alternate Cooling
CFM 1159 1104 1045 990 937 878 821 759 693 618
BHP 0.31 0.32 0.33 0.33 0.34 0.35 0.36 0.37 0.37 0.38
Gas Heat Rise (
o
F)
39 40 43 45 48 51 54 NA NA NA
Gas Heat Rise (
o
C)
21 22 24 25 26 28 30 NA NA NA
Medium-High** Orange
Cooling
Alternate Heating
CFM 1201 1147 1095 1037 987 934 877 818 755 671
BHP 0.34 0.35 0.36 0.37 0.37 0.38 0.39 0.40 0.41 0.40
Gas Heat Rise (
o
F)
37 39 41 43 45 48 51 55 NA NA
Gas Heat Rise (
o
C)
21 22 23 24 25 27 28 30 NA NA
High Black High Static Cooling Only
CFM 1291 1236 1181 1131 1080 1033 978 909 792 661
BHP 0.41 0.42 0.43 0.43 0.44 0.45 0.46 0.45 0.43 0.40
Dry Coil Air Delivery* - Horizontal and Downflow Discharge Sizes 24-60
Unit
Size
Heating
Rise
o
F (
o
C)
Motor Speed Tap
Allowable
Functions
ESP (in. W.C.)
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1