Payne PG9MAA, Installation Manual

Page: 26 / 72

installed in an enclosure communicating with another fuel-burning appliance not of the direct-vent type, shall be operable only when any door or
panel covering an opening in the furnace fan compartment or in a return air plenum on ducts is in the closed position.
WARNING: FIRE HAZARD
A failure to follow this warning could result in fire, personal injury, or death.
Never connect return-air ducts to the back of the furnace. Return-air duct connections on furnace side(s) permitted in upflow
applications only.
UPFLOW FURNACES
The return-air duct must be connected to bottom, sides (left or right), or a combination of bottom and side(s) of main furnace casing as shown
in Fig. 2. Bypass humidifier may be attached into unused side return air portion of the furnace casing. DO NOT connect any portion of return-air
duct to back of furnace casing.
DOWNFLOW AND HORIZONTAL FURNACES
The return-air duct must be connected to return-air opening provided as shown in Fig. 2. DO NOT cut into casing sides or back to attach any portion
of return-air duct. Bypass humidifier connections should be made at ductwork or coil casing sides exterior to furnace.
E. Filter Arrangement
CAUTION: FIRE, CARBON MONOXIDE AND POISONING HAZARD
Failure to follow this warning could result in fire, personal injury, or death.
Never operate a unit without a filter or with filter access door removed.
Factory-supplied washable framed filters are shipped in blower compartment. Determine location for filter and relocate filter retaining wire if
necessary. See Table 4 to determine correct filter size for desired filter location. Table 4 indicates filter size, location, and quantity shipped with
furnace. See Fig. 2 for location and size of bottom and side return-air openings.
CAUTION: CUT HAZARD
Failure to follow this caution may result in minor personal injury.
Use care when cutting support rods in filters to protect against flying pieces and sharp rod ends. Wear safety glasses, gloves, and
appropriate protective clothing.
Fig. 26—Crawlspace Location in Non-Direct Vent Application (Sizes 040 through 120 Only)
A96209
NOTES:
ANGLE
IRON OR
EQUIVALENT
(B)
(A) ROD LOCATION
USING DIMPLE
LOCATORS
(SEE DIMENSIONAL
DWG FOR
LOCATIONS)
13 /
16
-IN. MAX
ALTERNATE SUPPORT
LOCATION FROM BACK
ALTERNATE SUPPORT
LOCATION 4-IN. MIN
8-IN. MAX
A 3-IN. MINIMUM
CLEARANCE TO
COMBUSTION-AIR INTAKE
IS REQUIRED.
3
⁄
8
-IN. ROD
(A) (B)
(A)
(B)
(B)
(A)
1. A 1 In. clearance minimum between top of
furnace and combustible material.
2. The entire length of furnace must be
supported when furnace is used in
horizontal position to ensure proper
drainage.
3. Bottom side combustion-air entry cannot
be used when furnace is installed with
hangers as shown.
(A) PREFERRED ROD LOCATION
(B) ALTERNATE ROD LOCATION
DRAIN
5
3
⁄
4
″
3
/
8
-IN. HEX NUT
& WASHER (4)
REQD PER ROD
VENT
COMBUSTION-AIR
INTAKE
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