Qmark LFK Series - Wall Heater User Manual

Page 3

Installation of Back Box With Optional

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 back box is firmly attached to the wall.

3. Power Supply Wiring

NOTE: Wiring Compartment Volume - 119in3 (1950cm3).

a. Run a power supply cable into the area of the upper

right corner of the mounting frame.

NOTE: If the wiring is to run through the wall, cut a hole in the

area of the top of the back 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. Feed the power supply cable through the frame allow-

ing 6" (152mm) of lead to remain inside the frame

d. Secure the power supply cable to the back box

(using cable clamps, connector, or other suitable strain

relief) allowing 6”(152mm) of lead to remain inside the

back box.

e. Ground the back box by connecting the supply ground

leadwire to the green ground screw located in the

inside top of the back box.

Installation of Heater Assembly and Grille

After back box is competely installed and no further con-

struction 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 power lead wires (field wiring) to the lead

wires from the heater assembly. See wiring diagram

in next column.

4. Turn thermostat to the extreme counterclockwise

position.

5. Mount the grille using four (4) long screws provided.

The screws thread into holes located in the side

flanges of the back box.

6. Push thermostat knob onto thermostat shaft.

Fig. 3: Surface Mounting Installation

Fig. 4

HANG FRAME

ON BACK BOX

15-5/32"

(385mm)

19"

(482mm)

3-13/16"

(97mm)

MOUNT BACK BOX TO

WALL USING REAR

MOUNTING HOLES.

POWER

LEADS

RECESS BACK

BOX

HEATER

ASSEMBLY

THERMOSTAT

KNOB

GRILLE

1500, 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 ter-

minals.)

NOTE: Conversion not applicable on K151.

4800, 4000, & 3000 WATT HEATERS

347V, 600V

2000 & 1500 WATT HEATERS

208V, 240V, OR 277V

WIRING DIAGRAMS (SINGLE PHASE)

Element

Red

Fan Motor

TʼStat

GND

F.D.

Manual

Reset

Limit

Manual

Reset

Limit

Manual

Reset

Limit

Field

Wiring

Fan Motor

TʼStat

Field

Wiring

Fan Motor

CAUTION

To assure proper operation of fan, thermostat must not cycle fan

on and off. Follow wiring diagram exactly.