Recessed Mount Installation - Williams 3144030 Owner's Manual

Installation

Recessed Mount Installation

BEFORE YOU BEGIN: To avoid electrical shock, turn off electrical circuits that pass through the wall where you are going to install
the heater.
If you intend to use the optional rear outlet, turn to page 12 for rear outlet installation procedure before you begin to install the heater.
Use only the optional grille and boot extension supplied by the manufacturer.
Find the Studs
Use a stud locator 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.
Inside edge of the other stud should be about 14½ inches from the one found. Drive finishing nail on inside edge of this stud.
NOTE
IF STUDS ARE NOT ON 16-INCH-CENTERS, SEE CLOSE OFF STUD SPACE, PAGE 9.
Cut Wall Opening
Lay out and cut the required opening(s) in wall per Figure 3.
The vertical height of the opening shown is 3-inches greater than
the height of the heater to allow space for connection of wiring
after the heater is installed.
FIGURE 3 – Cut Wall Opening
Electrical Supply Rough-In
1. To properly route the conduit, electrical power supply wires and the thermostat wiring to heater top, you may make entry holes in
the ceiling wall plate above the heater.
2. If impractical to bring wiring to the heater from the attic space, you may drill the entry holes through either wall stud above the
heater and route the conduit and wiring from an adjoining stud space, crawl space or basement to a point above the heater to
match the openings in Figure 4.
3. At your selected location, drill a 1-inch hole for the electrical conduit and a ½-inch hole for the thermostat wires.
4. Install the conduit and allow it to extend 4-inches below the top of the heater wall opening. (This will allow 1-inch of conduit to
extend inside the heater cabinet.) See Figure 3
8
FIGURE 4 – Electrical Rough-In