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42
A = 4 1/4” (108mm) Minimum
clearance from back of hole
to wall or other obstruction.
A
Hole in
Floor
M
N
25--20--46
L
R
H
K
2″ (50.8mm)
2″
(50.8mm)
1″ (25.4mm)
J
P
Plenum
S
T
A07781
Fig. 47 -- Exploded View of Subbase for Furnace Only
2
1
/
2
″ (63.5mm)
1
1
/
2
″ (38.1mm)
A09182
Fig. 48 -- Exploded View of Base for Downflow Cased Coil
5. Position furnace or coil cabinet and furnace on subbase so it
aligns between the locating tabs.
Furnace
Plenum
Wood Floor
Installation of
Combustible
Floor Base
A07783
Fig. 49 -- 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 Fig. 50
A07784
Fig. 50 -- Condensate Line Raised by Base
CHECKS AND ADJUSTMENTS
NOTE: Verify the input rate of the furnace.
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal injury,
death 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’s Information
Manual”ortothe“Operating Instructions Label” on the furnace.
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury,
death, and/or property damage.
If any sparks, odors or unusual noises occur, immediately shut
OFF power to the furnace. Check for wiring errors or
obstruction to blower.
!
WARNING
Gas Supply Pressure
Gas supply pressure should be within minimum and maximum
values listed on rating plate. Pressures are usually set by gas
suppliers.
Manifold Gas Pressure Adjustments
(High and Low Heat)
NOTE: Make adjustment to manifold pressure with burners
operating.
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal injury,
death and /or property damage.
Turn OFF gas at shut off before connecting manometer.
!
WARNING
58HDV