Installation of Recessed Wall
Housing in New Construction
1. Mounting Wall Housing (See Figure 1).
a. Place the wall housing between two 16" (406 mm)
center-to-center wall studs at the desired mounting
height but no closer than 8" (203 mm) to adjacent wall
or floor.
b. Align wall box such that the bottom and sides will be
flush with finished wall surface (top flange of wall box
should protrude approximately 1/2" (12.7 mm) from fin-
ished wall surface).
c. Secure the housing in position with wood screws or
nails as shown in Figure 1.
2. Power Supply Wiring (See Figure 1)
Note: Wire compartment volume - 119in
3
(1950cm
3
).
a. Run a power supply cable into the knockout area in the
upper right hand corner of the housing. All wiring must
be in accordance with National and Local Electrical
Codes. Refer to Table 1 for correct wire size.
b. Remove disconnect switch bracket by loosening two
screws on the right side.
c. Install a cable clamp in the “knockout” in the top of the
wall housing.
d. Insert power supply cable through cable clamp, allow-
ing at least 6" (152mm) of leads to extend inside the
housing. Connect the blue lead wires of disconnect
switch to the supply wire leads using wire connectors
(see wiring diagram, pg. 3).
e. Ground the housing using the green screw located in
the inside top of the housing.
f. Secure disconnect switch bracket in place by tighten-
ing screws.
Installation of Recessed Wall Housing
in Existing Construction
1. Provide a wall opening 14-1/2" (362mm) wide by 18-1/2"
(470mm) high at the desired mounting height, but no
closer than 8" (203mm) from floor. (See Figure 2.)
2. Power Supply Wiring
Note: Wiring Compartment Volume - 119in
3
(1950cm
3
).
a. Run a power supply cable into the area above the top
of the wall opening. All wiring must be in accordance
with National and Local electrical codes. Refer to Table
1 for correct wire size.
b. Remove disconnect switch bracket by loosening the
two screws on the right side.
c. Install a cable clamp in the “knockout” in the top of wall
housing.
d. Insert power supply cable through cable clamp, allow-
ing approximately 6" (152mm) of cable length to
remain inside the wall housing to facilitate connections.
3. Mounting Wall Housing
a. Place the wall housing into wall opening flush with fin-
ished wall surface on bottom and sides of box. (Top
flange of wall box should protrude approximately 1/2"
or 12.7mm from finished wall surface).
b. Secure the wall housing in place with wood screws or
nails.
4. Wiring Disconnect Switch
a. Connect the power supply wires to the blue wires of the
disconnect switch using wire connectors (see wiring
diagram, pg. 3.)
b. Ground the housing using the green ground screw
located in the inside top of the housing.
c. Secure disconnect switch bracket in place by tighten-
ing screws.
IMPORTANT
CAUTION
WARNING
DO NOT INSTALL HEATER UPSIDE DOWN OR SIDE-
WAYS.
DO NOT USE HEATER WITHOUT GRILLE.
FOR WALL MOUNTING ONLY. DO NOT INSTALL HEATER
CLOSER THAN 8" (203 mm) TO THE FLOOR OR ANY
ADJACENT WALL SURFACE. DO NOT INSTALL CLOSER
THAN 36" (915 mm) TO THE CEILING.
Fig. 1: Locating Recessed Housing in New Construction
Fig. 2: Locating Recessed Housing in Existing Construction
TABLE 1
WATTS
4000
4000
4800
4800
4800
Ph
3
3
3
3
1
MODEL #
FRA 40203
FRA 40243
FRA 48203
FRA 48243
FRA 4820
VOLTS
208
240
208
240
208
WIRE SIZE
14 AWG
14 AWG
12 AWG
14AWG
10AWG
!
!
!
2
8” (203mm) MIN
