I-RPB (04-21) 131782-A, Page 5
4.2 Clearances
REQUIRED CLEARANCES
Model
Series
Top
Sides Bottom
Control Opposite
To
Combustibles
To Non-
Combustibles
RPB
36"
(915mm)
Width of furnace
plus 6" (152mm)
6"
(152mm)
0 * 0
* When installed on a roof
curb on a combustible
roof, the roof area
enclosed within the curb
must be either ventilated,
left open, or covered with
non-combustible material
that has an R-value of at
least 5.0 (see FIGURE
3A).
NOTES:
*Height from top of
cabinet to top of curb
cap.
**Height from top of
cabinet to bottom of
cabinet side.
**** The two-position
discharge dampers in
option AQ8 t in the
discharge air opening.
The damper motor ts
inside the downturn
plenum cabinet.
Provide clearance to combustibles as shown in the table. Clearance to combustibles is
dened as the minimum distance from the heater to a surface or object that is neces-
sary to ensure that a surface temperature of 90°F above the surrounding ambient tem-
perature is not exceeded. Clearance is also required to sides of furnace for combustion
air space and for convenient installation and burner control system service.
5.0 Mounting
Approximate Net Weight (Blower and Furnace Sections Only)
Size 125 150, 175 200, 225 250, 300 350 400
Weight
lb 482 520 534 588 630 662
kg 219 236 242 267 286 300
5.1 Weights
5.2 Rigging and
Lifting
Lifting holes are provided for rigging. Use spreader bars when lifting to prevent chains
or cables from damaging the unit. If the unit is being mounted on a roof curb, apply
caulking to the roof curb prior to lifting the unit and setting it on the curb (see FIGURE
3A).
If the system includes an outside air hood, attach it after the unit is in place.
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