Roberts Gorden H8S-2237 User Manual
Combat® IDF-Series
Indirect-Fired Heating, Cooling and Ventilation Systems
■ Discharge air free of combustion by-products.
■ High e ciency due to three or four pass heat
exchanger design.
■ Longer part longevity: Motors, belts and bearings
are placed out of the airstream.
■ Rugged, heavy-duty construction: Unit cabinet
is supported by welded steel frame. Casing is
nish-coated to help protect against corrosion.
■ Modular design allows for custom
con gurations to meet customers' needs.
■ Evaporative and mechanical cooling
packages available.
Combat
1.800.828.7450
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™
Combat® by Roberts-Gordon IDF-Series
COMBAT® by Roberts-Gordon IDF-Series air handlers improve indoor air quality and provide air comfort.
COMBAT® by Roberts-Gordon IDF-Series is one of the most versatile indirect- red heating systems. With three fuel
options, three control options, nine discharge choices, horizontal or upright installation, plus a complete line of air
handling and ltering accessories, COMBAT® by Roberts-Gordon IDF-Series is designed to last for years with proper
installation, maintenance and use.
MODEL IDF-35 IDF-45 IDF-50 IDF-65 IDF-75 IDF-85 IDF-100 IDF-125 IDF-150
CFM
Output
[MBH]*
MODEL IDF-175 IDF-200 IDF-225 IDF-250 IDF-275 IDF-300 IDF-350 IDF-400 IDF-450
CFM
Output
[MBH]*
3,500-
6,000
240-
350
13,000-
24,000
600-
1,750
3,500-
6,000
240-
450
21,000-
37,000
600-
2,000
4,000-
8,000
240-
500
21,000-
37,000
600-
2,250
4,000-
8,000
520-
650
21,000-
45,000
600-
2,500
6,000-
12,000
520-
750
21,000-
45,000
720-
2,750
6,000-
12,000
520-
850
30,000-
45,000
720-
3,000
6,000-
12,000
520-
1,000
35,000-
57,000
720-
3,500
10,000-
18,000
560-
1,250
35,000-
57,000
1,400-
4,000
13,000-
24,000
35,000-
57,000
* 1 MBH = 1,000 Btu/h
Model Con gurations
Outside
Air
Bottom
Discharge
Make-Up Air (MUA) Models
Design: 100% replacement air with a xed discharge air volume.
Function: Supplies direct replacement air for building mechanical exhaust.
Application: Used as make-up air for paint booths and other industrial
processes which incorporate mechanical exhaust.
560-
1,500
1,400-
4,500
Potentiometer Control
Bottom
Discharge
Pressure Gauge
Bottom
Discharge
Bottom
Return
Bottom
Return
Outside
Air
Outside
Air
Fixed Recirculation (FR) Models
Design: Manual modulation of outdoor air from 0% to 100% with use of
mixing box and potentiometer.
Function: Provides e cient, low-cost heating where minimum ventilation
rates are required.
Application: Used in warehouses, distribution centers, retail outlets, etc.
Air Management (AM) Models
Design: Automatic modulation of outdoor air from 0% to 100% with use
of mixing box and pressure gauge.
Function: Automatically responds to building pressure and temperature
needs.
Application: Used in industrial and commercial buildings that have air
quality and speci c air management requirements.
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