5. Bring power supply wiring cable to the back box. Install a cable clamp
and install into the back box, leaving at least 6" (152mm) of cable
inside the back box for connection to the heater lead wires.
NOTE B:
Lead holes for a #8 sheet metal screw have been provided in the
sides of the back box. (See Figure 2).
INSTALLATION OF BACK BOX
IN EXISTING CONSTRUCTION
1. Determine which side of the back box is to be mounted against a wall stud
or ceiling joist. See Figure 2.
2. Carefully mark and cut a hole in the wall or ceiling measuring 9-1/8"
(231mm) wide by 12-5/8” (320mm) high with one side of the hole along the
edge of a wall stud or ceiling joist. See Figure 3
3. Bring the power supply wiring cable to the heater mounting location, allow-
ing approximately 10" (254mm) length for use in installation.
4. Remove fan deck from back box by removing 2 screws.
5. Remove knockout in the back box, install a cable clamp onto power supply
cable and install the cable into the back box, leaving approximately 6"
(152mm) of cable inside the back box for connection to the heater lead
wires.
6. Fit the back box into the opening by sliding the supply wiring cable into posi-
tion. Back box must be installed with front edge flush with the finished sur-
face. Secure the back box to stud using two nails or screws. (See note B).
The D-Series heaters are designed for recessed installation in 2 x 4 or
larger wall studs or ceiling joists using the model D-BB back box with the
discharge grille (the smaller grille) to the top or bottom (see Figure 1). The
heater may be wired using standard building (60 degrees C minimum)
wire. Refer to the specification chart for appropriate wire size for the
heater to be used.
All units in the D series rated 1000 watts and less may be installed
recessed in the ceiling. If installed in the ceiling the heater may be orient-
ed in any direction.
Heaters are also approved for surface mounting on walls or ceilings.
Refer to instructions for installation of the DSMK Surface Mounting
Frame.
INSTALLATION OF BACK BOX IN NEW
CONSTRUCTION
NOTE A
: If the finished wall is already up, follow instructions for “INSTAL-
LATION OF BACK BOX IN EXISTING CONSTRUCTION.”
1. Determine which side of the back box is to be mounted against a
stud or ceiling joist. (see Figure 2). Allow for the thickness of the fin-
ished surface when installing the back box. The edge of the back
box must be installed flush with the finished surface. Markings on
the side of the back box for 1/2" or 5/8" finishing wall are provided .
2. Remove fan deck from back box by removing 2 screws.
3. Position the back box on the stud or joist location desired and secure
using two nails or screws as shown in figure 2.
4. Remove one knockout in the back box for entry of supply wiring
cable.
AN ELECTRICAL SHOCK, FIRE, OR WATER DAMAGE COULD
RESULT IF WIRING OR PIPING IS DAMAGED DURING CUTTING.
MAKE SURE ALL WIRING AND PIPING ARE CLEAR OF AREA
BEFORE CUTTING.
TO REDUCE RISK OF FIRE, ELECTRIC SHOCK, OR DAMAGE TO
HEATER, OBSERVE THE FOLLOWING:
1. Do not install heater without backbox.
2. Observe the following minimum clearances:
For wall mounting:
Heater to floor - 4.5” (114 mm)
Heater to any adjacent surface - 4.5” (114 mm)
Heater to ceiling - 12” (305 mm)
For ceiling mounting:
Heater to adjacent wall - 12” (305 mm)
3. The heater is hot when in use. Do not install heater behind door,
behind towel rack, in closet, where curtains or drapes could touch or
be damaged by the heat.
4. Keep electrical cords, bedding, furniture, and other combustibles
away from heater.
CAUTION
2
CAUTION
!
!
M
BLK
BLK
L2
RED
L1
GND
T STAT
PILOT
LT.
AUTO
LIMIT
TCO
240/208 V
AUTO
LIMIT
2000 WATTS
M
BLK
L2
RED
L1
GND
T STAT
PILO T
LT.
240/208 V
1000 WATTS
M
RED
GND
T STAT
PILOT
LT.
AUTO
LIMIT
TCO
120 V
N
L
1000 WATTS
M
WHT
BLK
BLK
WHT
RED
GND
T STAT
PILOT
LT .
AUT O
LIMIT
TCO
120 V
N
L
1500 WA TTS
TCO
L
N
L
N
9-1/8” (231mm)
12-5/8” (320mm)
Supply
Cable
Figure 4
Figure 3
Figure 1
Figure 2
