ICP *9MPT050F12 - Checks and Adjustments

440 01 2021 01
40
Furnace Subbase
Figure 45
A = 4 1/4” Minimum
clearance from back of hole
to wall or other obstruction.
Plenum
S
T
A
Hole in
Floor
M
N
25--20--46
L
R
H
K
2²
2²
1²
J
P
4. Drop the plenum through the opening in the base. The
flange of the plenum should rest on top of the subbase.
5. Position furnace or coil cabinet and furnace on subbase so it
aligns between the locating tabs.
25--20--46b
A
Hole in
Floor
M
N
Figure 46
Coil Cabinet Subbase
A=4
1
/
4
” Minimum clearance from back of hole to wall or other
obstruction.
Plenum
S
T
1²
R
2²
2²
J
L
H
P
K
Combustible
Floor Base
Furnace
Plenum
Wood Floor
Installation of
Combustible
Floor Base
25--20--46a
Figure 47
Setting the Subbase
This subbase for combustible floors has been designed so that the
height of the subbase raises the downflow coil off the floor to allow
easy installation of the condensate drain. See Figure 48.
Condensate Line Raised by Base
Figure 48
25--20--52
9. Checks and Adjustments
NOTE: Verify the input rate of the furnace.
FIRE OR EXPLOSION HAZARD.
Failure to turn OFF gas at shut off before
connecting manometer could result in death,
personal injury and/or property damage.
Turn OFF gas at shut off before connecting
manometer.
!
WARNING
Startup
NOTE:Refer to the start--up procedures in the “User’sInformation
Manual”ortothe“Operating Instructions Label” on the furnace.
!
FIRE OR EXPLOSION HAZARD.
Failure to correct hazard could result in death,
personal injury, and/or property damage.
If any sparks, odors or unusual noises occur,
immediately shut OFF power to furnace. Check for
wiring errors or obstruction to blower.
W
A
RNING
Gas Supply Pressure
Gas supply pressure should be within minimumand maximum val-
ues listed on rating plate. Pressures are usually set by gas suppli-
ers.