Qmark COS-E Series - Residential Fan-Forced Zonal Wall Heaters - Manual (Page 3)

Installation and Wiring of Heater / Fan Assembly
NOTE: For installations over 7500 ft. above sea level we recom-
mend using heaters with wattages under 1500 watts. Models
with -IF suffix do not include a built-in thermostat. A 2 pole ther-
mostat kit model CZTDP is available if desired or a remote line
voltage wall thermostat may be used.
1. Following wiring diagram (Figure 2) connect supply wires to
heater leadwire in back-box using appropriate wire connec-
tors.
NOTE: For 120 volt heaters, connect the white neutral supply
lead to the heater’s white lead (or colored lead marked with “N”),
and connect the black power lead to the heater’s black lead.
For 208 /240 volt heaters (with two hot power leads), if either
power lead is white in color, change the color of the lead by
wrapping with black electrical tape (Most electrical codes require
the power supply leads to be black (non-white) in color). Connect
the two black power leads to the heater’s black (or black and
red) leads.
2. Secure supply ground wire under green ground screw in
back-box.
3. Fit heater/fan assembly into back-box fitting bottom section
into two tabs provided and securing top to back-box with
screw provided.
TO CHANGE WATTAGE OUTPUT
Your heater is provided with a clip out wire that will allow the
heater wattage output to be permanently reduced to 1/2 wattage
if desired (see Fig. 3). If wattage is changed to a reduced
wattage, installer must also check the appropriate box on label in
back-box. See instructions on how to reduce wattage located on
back side of fan panel.
Installation of Front Cover (Grille) and
Thermostat Knob
1. Fasten front cover to heater assembly using the (2) long
screws supplied.
2. Fit the thermostat knob onto the thermostat shaft and push
into place.
OPERATING
INSTRUCTIONS
NOTE: All heaters are intended to be controlled by a thermostat.
The below instructions are for units with a built-n thermostat. If
remote wall thermostat is provided, refer to the instructions pro-
vided with this control for proper operation.
1. Heater must be properly installed before operation.
2. After heater is completely assembled, rotate thermostat knob
counterclockwise until control stops. This is the minimum
heat setting.
3. Turn power supply to heater “ON” at main switch panel.
4. Heater should not operate. If it operates disconnect power
and recheck wiring.
5. Rotate thermostat clockwise until it stops (maximum heat
setting).
6. Heater and fan should come on. If heater and fan do not
come on, disconnect power and check wiring.
7. Allow heater to continue to operate until room temperature
reaches desired comfort level. Then rotate thermostat knob
counterclockwise slowly until thermostat clicks off.
8. It may be necessary to readjust thermostat a couple of times
until exact comfort level is attained. Rotation in the clockwise
direction will increase the amount of time the heater will
produce heat. Rotation in the counterclockwise direction will
reduce the amount of time the heater is on.
NOTE: For best results, the heater should be left “ON”
constantly during the heating season as the thermostat, when
properly set, will maintain the desired temperature. In the full
counter-clockwise position the heater will remain off until the
room temperature drops well below freezing.
How To Reset Over-Temperature Safety Control:
This heater is provided with an over-temperature safety control
that will turn the heater off if the heater overheats. If heater is
not operational, check to make sure it is not blocked or other-
wise damaged and remove any obstruction or condition that
might have caused the heater to shut off.
1. Turn the heater off at the thermostat OR disconnect power at
the circuit breaker for at least 10 minutes to allow the heater
to cool and the safety control to reset.
2. When the heater has cooled, check to see if the heater is
blocked or excessively dirty as these conditions may cause
overheating. Remove any blockages and /or refer to the
Cleaning Heater section for cleaning instructions if dirty.
DO NOT TAMPER WITH OR BYPASS ANY SAFETY LIMITS
INSIDE HEATER.
3
MOTOR
THERMOSTAT
ELEMENT
GND
POWER
CLIP WIRE
(FOR 1/2 WATT)
YEL-120V
RED-208V/240V
BLK - Others
YEL-120V
RED-208V/240V
SELF-HOLD
LIMIT
THERMAL
FUSE
L2
OFF L1
CYC
L2
L1/N
G
BLU - 240V/208V
Figure 2 - Wiring Diagram
CLIP OUT WIRE
Figure 3 - Clip-out wire location
Note: Thermostat not provided on -IF models
Note: IF Models - thermostat connects with wire nuts
BLACK
Remote or built-in
CLIP-OUT WIRE