7
RP-HRPD-IOM (07-22) 132210-B
Table 3. HRPD Dimensions
Dimension
(See
Unit Size
250
300, 350
400
500, 600
700
800
Inches (mm)
A
30-15/16 (786)
36-7/16 (926)
41-15/16 (1065)
50-3/16 (1275)
55-11/16 (1414)
61-3/16 (1554)
B
28-1/2 (724)
34 (864)
39-1/2 (1003)
47-3/4 (1213)
53-1/4 (1353)
58-3/4 (1492)
C
15-1/4 (387)
20-3/4 (527)
26-1/4 (667)
34-1/2 (876)
40 (1016)
45-1/2 (1156)
D
20-5/16 (516)
25-13/16 (656)
31-5/16 (795)
39-9/16 (1005)
45-1/16 (1145)
50-9/16 (1284)
E
3-3/32 (79)
1-21/32 (42)
Weights
Before installation, check the supporting structure to ensure that it has sufficient load-carrying capacity to support
the weight of the unit . Refer to
, which lists unit weight based on unit size .
Clearances
Clearance to combustibles is defined as the minimum distance—from the heater to a surface or object—that is
necessary to ensure that a surface temperature of 90°F (50°C) above the surrounding ambient temperature is not
exceeded . For safety, adequate combustion air, and convenient installation and service, ensure that the clearances
listed in
Table 4. Weights
Model
RP Unit Size
125
150, 175
200, 225
250, 300
350
400
HRPD Unit Size
250
300, 350
400
500, 600
700
800
Pounds (kg)
RP
201 (91)
217 (98)
247 (112)
295 (134)
333 (151)
361 (164)
HRPD
402 (182)
434 (196)
494 (224)
590 (268)
666 (302)
722 (328)
Table 5. Clearances
Unit Surface
Minimum Clearances (Inches (mm))
Top
36 (915)
Control side
6 (152) + width of furnace
Side opposite controls
6 (152)
Bottom, to combustibles
0 (0)
Bottom, to noncombustibles
0 (0)
Unit Location
⚠ CAUTION ⚠
Do not locate the heater where it may be exposed to water spray, rain, or dripping water.
•
Select a location that complies with the requirements in this manual .
•
There are a variety of factors, such as system application, building structure, dimensions, and weight, that contribute
to selecting the location .
•
The location must comply with the clearances listed in
.
•
A duct furnace is designed for connection to an inlet and an outlet duct and depends on an external air handler .
Combustion Air Requirements
The combustion air and flue gas openings are carefully designed screened openings located on the side of the
unit just above the control access panel . Location of the flue opening directly above the air intakes discourages
recirculation of combustion products .