Williams 3508232 Owner's Manual page 15

Installing Your Furnace
ALL MODELS
ATTACH HOLD-DOWN PLATE
(RECESSED MOUNT)
NOTE
Header plate should already be attached to wall studs. See
ATTACH HEADER PLATE, on Page 11 and 12.
Fasten hold-down plate to top of header plate using two (2)
screws provided.
1/8" FROM WALL
INSTALL CEILING PLATE SPACERS
(SURFACE MOUNT)
Refer to Fig. 16.
Only one (1) plate spacer is required for surface mounting within a
single story dwelling.
Cut 2 inches off each end of plate spacer.
Drill two (2) 3/16 inch holes in each end of plate spacer as shown
in Fig. 16.
Fasten plate spacer to wall by nailing through one (1) drilled hole
in each end, into the wall board and ceiling plate.
INSTALL CEILING PLATE SPACER
(RECESSED MOUNT)
Refer to Fig. 17.
Two ceiling plate spacers are in the B/W vent kit 9901. They must
be fastened along each long edge of the ceiling hole to hold the
oval vent pipe in the center of the hole.
Nail the ceiling plate spacers either across or in between the cut
out section of ceiling plate. If nailed between, ends must be bent
at 90 degrees.
INSTALL SURFACE VENT (SURFACE MOUNT)
NOTE
For surface mounting, it will be helpful to complete the gas piping
supply to the furnace before installing the vent pipe. See section
GAS SUPPLY & PIPING, page 18.
Carefully move the furnace into position under the ceiling cutout.
Insert first lengths of oval, double wall vent pipe up through the
ceiling cutout. Lower vent pipe to the hold-down plate. Push the
vent pipe into the hold-down plate until it is completely seated.
(Hold-down cleats will engage the groove in the vent pipe.)
Secure hold-down plate to vent pipe using two (2) screws.
Using plumbers tape to secure vent to the plate spacer, nail
through one (1) hole in each end of plate spacer, into the wall and
ceiling plate.
INSTALL FURNACE VENT (RECESSED MOUNT)
Lower first lengths of oval, double wall vent pipe through the plate
spacers to the hold-down plate.
Push the vent pipe into the hold-down plate until it is completely
seated. (Hold-down cleat will engage the groove in the vent pipe.)
Secure hold-down plate to vent pipe using two (2) screws.