Surface Mount Installation - Williams 4007332 Owner's Manual

Installing Your Furnace

Surface Mount Installation

FIND THE STUDS
1. Find two studs at spot where furnace is to be placed. Use a
stud indicator or small finishing nails. Repeatedly drive and
remove a nail into the wall in the area of the stud until you find
it. Then find one side. Leave the nail there. Drive another nail
just on the other side of the same stud.
2. Inside edge of the other stud should be about 14½-inches
from the one found. Drive finishing nail on inside edge of this
stud.
CUT VENT OPENINGS
1. Lay out and mark the center of the hole to be cut through the
wall for the vent (Page 9, Fig. 8). Using a window, door, or wall
corner for reference, measure to find where vent will be on
outside wall. Check to be sure clearances are correct. (See
Pages 7 & 8, Fig. 2, 4, 5, 6 & 7).
2. Drill a ¼-inch hole through vent hole center to the outside. Cut
the 9¼-inch diameter hole through inside wall. Using the ¼-
inch hole as the center, cut a matching hole in outside wall. It
may be better to work from the outside, especially when
breaking through brick, stone or tile.
GAS AND ELECTRICAL SUPPLY OPENINGS
Holes must be drilled for the gas line and electrical supply. Holes
must be located from each side of furnace as shown on Page 10,
Fig. 10.
Drill a 1½-inch hole in floor or wall for gas line.
Gas line can be run at this time or done after furnace is mounted,
see section: Gas Supply and Piping, Page. 18. Mark ceiling or
wall to match wall furnace openings and drill a 1-inch hole for the
power supply and a ½-inch hole for the thermostat cable. Run the
electrical supply and ground wires to the opening. Leave enough
length to connect in the junction box after the furnace is installed.
See section "Electrical Wiring," Page 19.
FIGURE 11 Wall Opening (Surface Mount)
ROUGH-IN OPTIONAL SIDE OUTLET NO. 6701
Install plaster ground as shown in Figs. 12 & 13. Flanges of
plaster ground extend the thickness of normal plaster. If "dry-wall"
or other thin material, flanges must be trimmed off flush with wall
surface.
Follow measurements given carefully, and note that when a side
outlet is used, the furnace casing must be exactly 4 inches from
surface of adjacent wall except minimum clearance may be ¾-
inch when optional 1-way Diffusing Grille Kit 6704 is used.
FIGURE 12 Plaster Ground Installation
FIGURE 13 Plaster Ground Installation