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.
22
42090
35 - 65
(19 - 36)
Low† Blue
CFM 956 899 843 786 729 676 621 558 504 435
BHP 0.13 0.13 0.14 0.15 0.16 0.16 0.17 0.18 0.18 0.19
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 1201 1153 1107 1060 1012 965 917 871 828 782
BHP 0.21 0.22 0.22 0.23 0.24 0.25 0.26 0.27 0.28 0.29
Gas Heat Rise (
o
F)
56 58 60 63 NA NA NA NA NA NA
Gas Heat Rise (
o
C)
31 32 34 35 NA NA NA NA NA NA
Medium‡ Red
Heating
Alternate Cooling
CFM 1443 1402 1361 1322 1284 1243 1204 1164 1124 1084
BHP 0.32 0.33 0.34 0.35 0.36 0.37 0.38 0.39 0.40 0.42
Gas Heat Rise (
o
F)
46 48 49 51 52 54 56 58 60 62
Gas Heat Rise (
o
C)
26 27 27 28 29 30 31 32 33 34
Med-High** Orange
Cooling
Alternate Heating
CFM 1529 1491 1451 1411 1376 1338 1300 1261 1223 1185
BHP 0.37 0.39 0.40 0.41 0.42 0.43 0.44 0.45 0.46 0.47
Gas Heat Rise (
o
F)
44 45 46 47 49 50 52 53 55 57
Gas Heat Rise (
o
C)
24 25 26 26 27 28 29 29 30 31
High Black High Static Cooling Only
CFM 1604 1565 1529 1490 1455 1421 1385 1348 1310 1274
BHP 0.42 0.44 0.45 0.46 0.47 0.48 0.49 0.50 0.51 0.52
48090
35 - 65
(19 - 36)
Low† Blue
CFM 641 551 462 385 289 216 163 115 --- ---
BHP 0.05 0.06 0.06 0.07 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
Heating
Alternate Cooling
CFM 1437 1395 1351 1307 1265 1221 1176 1132 1084 1039
BHP 0.29 0.30 0.31 0.32 0.33 0.34 0.35 0.36 0.37 0.38
Gas Heat Rise (
o
F)
47 48 50 51 53 55 57 59 62 64
Gas Heat Rise (
o
C)
26 27 28 28 29 30 32 33 34 36
Medium** Red
Cooling
Alternate Heating
CFM 1771 1735 1699 1664 1627 1592 1557 1522 1486 1450
BHP 0.51 0.52 0.53 0.55 0.56 0.57 0.58 0.59 0.61 0.62
Gas Heat Rise (
o
F)
38 39 39 40 41 42 43 44 45 46
Gas Heat Rise (
o
C)
21 21 22 22 23 23 24 24 25 26
Med-High Orange
Alternate Cooling
Alternate Heating
CFM 1928 1897 1862 1830 1796 1764 1732 1698 1620 1512
BHP 0.64 0.65 0.67 0.68 0.69 0.71 0.72 0.73 0.71 0.66
Gas Heat Rise (
o
F)
35 35 36 37 37 38 39 39 41 44
Gas Heat Rise (
o
C)
19 20 20 20 21 21 21 22 23 25
High Black High Static Cooling Only
CFM 2212 2167 2124 2061 1976 1892 1794 1699 1567 1438
BHP 0.97 0.99 1.00 0.97 0.95 0.91 0.86 0.82 0.77 0.71
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