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.
23
* Air delivery values are without air filter and are for dry coil (See Wet Coil Pressure Drop Table).
† Factory-shipped continuous fan speed
‡ Factory-shipped heating speed
** Factory-shipped cooling speed
"High Static Cooling" = Only to be used for cooling function (not allowed for heating function)
NOTE: Deduct field-supplied air filter pressure drop and wet coil pressure drop to obtain static pressure available for ducting.
60090
35 - 65
(19 - 36)
Low† Blue Alternate Heating
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 1914 1881 1848 1814 1780 1748 1716 1681 1619 1512
BHP 0.62 0.64 0.65 0.67 0.68 0.69 0.71 0.72 0.71 0.66
Gas Heat Rise (
o
F)
35 36 36 37 38 38 39 40 41 44
Gas Heat Rise (
o
C)
19 20 20 21 21 21 22 22 23 25
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
Shaded areas indicate speed/static combinations that are not permitted for dehumidification speed.
Wet Coil Pressure Drop (IN. W.C.)
Unit
Size
Standard CFM (SCFM)
600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200
24 0.03 0.04 0.04 0.05 0.06
30 0.05 0.06 0.07 0.08 0.11
36 0.02 0.03 0.03 0.04 0.05 0.05
42 0.05 0.05 0.06 0.07 0.08 0.08 0.09 0.09 0.11
48 0.04 0.05 0.05 0.06 0.07 0.07 0.08 0.09 0.14
60 0.06 0.07 0.01 0.08 0.09 0.10 0.12 0.13
Economizer with 1-in. Filter Pressure Drop (IN. W.C.)
Filter Size in. (mm)
Cooling
Tons
Standard CFM (SCFM)
600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200
600-1400 CFM
12x20x1+12x20x1
(305x508x25+305x508x25)
2.0,
2.5
- - 0.08 0.09 0.10 0.11 0.11 0.13 0.14 - - - - - - - -
1200-1800CFM
16x24x1+14x24x1
(406x610x25+356x610x25)
3.5 - - - - - 0.09 0.09 0.10 0.12 0.13 0.15 0.17 0.17 0.19 0.21 - -
1500-2200CFM
16x24x1+18x24x1
(406x610x25+457x610x25)
3.0,
4.0,
5.0
- - - - - - - - - 0.15 0.17 0.18 0.20 0.21 0.22 0.23 0.23
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