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.
19
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
24040
25 - 55
(14 - 31)
Low† Blue Alternate Heating
CFM 640 553 454 310 --- --- --- --- --- ---
BHP 0.07 0.08 0.08 0.09 --- --- --- --- --- ---
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 830 758 688 607 514 393 254 --- --- ---
BHP 0.12 0.13 0.13 0.13 0.14 0.14 0.15 --- --- ---
Gas Heat Rise (
o
F)
40 44 49 55 NA NA NA NA NA NA
Gas Heat Rise (
o
C)
22 25 27 31 NA NA NA NA NA NA
Medium** Red
Cooling
Alternate Heating
CFM 1080 1025 969 910 852 787 718 638 541 457
BHP 0.21 0.22 0.23 0.23 0.24 0.24 0.25 0.25 0.26 0.27
Gas Heat Rise (
o
F)
31 33 35 37 39 43 47 52 NA NA
Gas Heat Rise (
o
C)
17 18 19 20 22 24 26 29 NA NA
Med-High Orange
Alternate Cooling
Alternate Heating
CFM 1101 1046 993 936 878 816 749 676 599 498
BHP 0.22 0.23 0.24 0.24 0.25 0.26 0.26 0.27 0.27 0.28
Gas Heat Rise (
o
F)
30 32 34 36 38 41 45 50 NA NA
Gas Heat Rise (
o
C)
17 18 19 20 21 23 25 28 NA NA
High Black High Static Cooling Only
CFM 1222 1173 1123 1072 1021 967 912 853 787 712
BHP 0.29 0.29 0.30 0.31 0.31 0.32 0.33 0.34 0.34 0.34
24060
25 - 55
(14 - 31)
Low† Blue
CFM 640 553 454 310 --- --- --- --- --- ---
BHP 0.07 0.08 0.08 0.09 --- --- --- --- --- ---
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 830 758 688 607 514 393 254 --- --- ---
BHP 0.12 0.13 0.13 0.13 0.14 0.14 0.15 --- --- ---
Gas Heat Rise (
o
F)
54 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
Cooling
Alternate Heating
CFM 1080 1025 969 910 852 787 718 638 541 457
BHP 0.21 0.22 0.23 0.23 0.24 0.24 0.25 0.25 0.26 0.27
Gas Heat Rise (
o
F)
41 44 46 49 52 NA NA NA NA NA
Gas Heat Rise (
o
C)
23 24 26 27 29 NA NA NA NA NA
Med-High‡ Orange
Heating
Alternate Cooling
CFM 1101 1046 993 936 878 816 749 676 599 498
BHP 0.22 0.23 0.24 0.24 0.25 0.26 0.26 0.27 0.27 0.28
Gas Heat Rise (
o
F)
41 43 45 48 51 55 NA NA NA NA
Gas Heat Rise (
o
C)
23 24 25 26 28 30 NA NA NA NA
High Black High Static Cooling Only
CFM 1222 1173 1123 1072 1021 967 912 853 787 712
BHP 0.29 0.29 0.30 0.31 0.31 0.32 0.33 0.34 0.34 0.34