Qmark CWH3000 Series - Commercial Fan-Forced Wall Heaters - Manual (Page 3)

Installation of Back box with
Surface-Mounting Frame
(See Figure 3)
1. Secure back box to wall with knockouts in upper right hand
corner using screws and anchors.
2. Hang the surface-mounting frame on the back box. Ensure
that the back edge of the surface-mounting frame is flush
against the wall.
NOTE: If heater is located in a high traffic area where it may be
subjected to vandalism or abuse, take extreme care to see that
the box is firmly attached to the wall.
3. Power Supply Wiring
NOTE: Wiring Compartment Volume - 119in 3 (1950cm 3 ).
a. Run a power supply cable into the area of the upper
right corner of the mounting frame. Arrangement of
wiring to this point must be in accordance with National
and Local codes. Refer to Table 1 on page 2 for
proper wire size.
NOTE: If the wiring is to run through the wall, cut a hole in the
area of the top of the wall box. Run the supply wire through this
hole. Then remove the “knockout” from the top of the box and
proceed to step C.
b. Remove the “knockout” on the top side of the frame.
c. Remove disconnect switch bracket by loosening the two
screws on the right side.
d. Feed the power supply cable through the frame allowing
6" (152mm) of lead to remain inside the back box.
e. Secure the power supply cable to the back box
(using cable clamp, connector, or other suitable strain
relief) allowing 6" (152mm) of lead to remain inside the
back box.
f. Connect supply wires to blue wires of disconnect switch
using wiring connectors (see wiring diagram).
g. Ground the back box by connecting the supply ground
leadwire to the green ground screw located in the
inside top of the back box.
h. Secure disconnect switch bracket in place.
Installation of Heater Assembly and Grille
After back box is completely installed and no further construc-
tion dirt is expected, clean debris from back box, remove heater
assembly from its carton, then refer to Figure 4 and proceed as
follows:
1. Insert the heater assembly into back box, placing
the four mounting holes (with key-hole slots) over the
screws in the back box. Tighten all screws securely.
2. If surface-mounting frame is used, ensure that the
frame is even with all four heater assembly tabs before
tightening screws.
3. Connect the two disconnected switch wires to the heater
control switch (thermostat) leads using wire nuts. After
connection, push wires back into the opening.
4. Turn thermostat to the extreme counterclockwise
position.
5. Push disconnect switch into ON position.
6. Mount the grille using the four (4) long screws provided.
The screws thread into holes located in the side flanges
of the back box.
7. Push thermostat knob onto thermostat shaft.
Fig. 4
DISCONNECT
L1
L2 or N
F.D.
L1 OFF
CYC L2
FAN MOTOR
MANUAL
RESET
LIMIT
ELEMENT
MANUAL
RESET
LIMIT
DISCONNECT
L1
L2 or N
ELEMENT
ELEMENT
F.D.
FAN MOTOR
FAN MOTOR
MANUAL
RESET
LIMIT
T-STAT
L1 OFF
CYC L2
T-STAT
L1 OFF
CYC L2
DISCONNECT
L1
L2 or N
F.D.
T-STAT
S
E
C
P
R
I
ELEMENT
ELEMENT
DISCONNECT
L1
L2 or N
F.D.
L1 OFF
CYC L2
FAN MOTOR
MANUAL
RESET
LIMIT
ELEMENT
MANUAL
RESET
LIMIT
DISCONNECT
L1
L2 or N
ELEMENT
ELEMENT
F.D.
FAN MOTOR
FAN MOTOR
MANUAL
RESET
LIMIT
T-STAT
L1 OFF
CYC L2
T-STAT
L1 OFF
CYC L2
DISCONNECT
L1
L2 or N
F.D.
T-STAT
S
E
C
P
R
I
ELEMENT
ELEMENT
DISCONNECT
L1
L2 or N
F.D.
L1 OFF
CYC L2
FAN MOTOR
MANUAL
RESET
LIMIT
ELEMENT
MANUAL
RESET
LIMIT
DISCONNECT
L1
L2 or N
ELEMENT
ELEMENT
F.D.
FAN MOTOR
FAN MOTOR
MANUAL
RESET
LIMIT
T-STAT
L1 OFF
CYC L2
T-STAT
L1 OFF
CYC L2
DISCONNECT
L1
L2 or N
F.D.
T-STAT
S
E
C
P
R
I
ELEMENT
ELEMENT
3-13/16" (97mm)
POWER LEADS
THERMOSTAT
KNOB
GRILLE
DISCONNECT
SWITCH
BACK
BOX
HEATER
ASSEMBLY
HANG FRAME
ON BACK
BOX
MOUNT BACK
BOX TO WALL
USING REAR
MOUNTING
BRACKETS
19" (482mm)
15-5/32" (385mm)
Fig. 3: Surface Mounting Installation
3
1500, 1800, 4800, 4000, & 3000 WATT HEATERS
120V, 208V, 240V, or 277V (Full wattage heaters can be converted to half
wattage by removing the red jumper wire connecting the top and bottom element
terminals.) See wiring diagram no. 6 for 4800W, 208V.
NOTE: Conversion to half wattage not applicable to CWH3150 and CWH3180.
4800, 4000, & 3000 WATT HEATERS
2000 & 1500 WATT HEATERS
208V, 240V, OR 277V
347V, 600V
WIRING DIAGRAMS
Red
Jumper
Wire
Diagram 1
Diagram 2
Diagram 3