11
RP-HRPD-IOM (07-22) 132210-B
Reverse Airflow Conversion
Duct furnaces are equipped with directional air baffles between the heat exchanger tubes . Facing the control
compartment of the furnace, the standard direction of airflow is from left to right . If the installation site requires airflow
from right to left, the unit may be field-adapted by reversing the position of the directional air baffles (see
)
as follows:
1 . Remove and save baffle screws and lift each airflow baffle slightly and slide forward . Remove all baffles from
heat exchanger .
2 . Remove and save top baffle support screws and remove top baffle support . Reposition and secure support on
opposite end of heat exchanger using existing screws .
3 . Remove bracket screws and remove bottom baffle support and bracket assembly . Reinstall bracket screws to
plug holes in heat exchanger bottom . Reposition bottom baffle support and bracket assembly on opposite end of
heat exchanger and secure using field-supplied sheet metal screws .
4 . Reinstall airflow baffles removed in step 1 and secure using existing screws .
Figure 6. Airflow Baffles
Mounting
⚠ DANGER ⚠
Use a suitable hoist to lift the unit (refer to
section). Lifting holes are provided at each of
the four corners of the mounting support rails. Use spreader bars when lifting to prevent chains
or cables from damaging the unit.
⚠ CAUTION ⚠
Furnaces must be level.
Lift the unit using a suitable hoist and spreader bars and
s
et it on a slab or roof where support is adequate .
Duct Connections
⚠ CAUTION ⚠
Joints where ducts attach to furnace must be sealed securely to prevent air leakage into burner
rack area. Leakage can cause poor combustion, poor performance, and pilot problems and can
shorten heat exchanger life.
NOTE: Make adjustments to ductwork as necessary to obtain a temperature rise and static pres-
sure within the ranges specified on the heater rating plate.
BRACKET
SCREWS
TOP BAFFLE
SUPPORT SCREWS
BAFFLE SCREWS
AIRFLOW BAFFLES
BOTTOM BAFFLE SUPPORT
TOP BAFFLE
SUPPORT
