Qmark CHPR25 - Compact Freeze Protection Heater - Manual (Page 3)

OPERATION
Setting the Thermostat
Rotate thermostat knob clockwise to the high position. After
desired temperature is obtained, rotate thermostat knob
counter-clockwise until the thermostat clicks off. Heater will
cycle on and off to maintain room temperature.
NOTE: The first time you operate the unit, it may smoke
slightly. This is due to the residual cleaning agents used to
clean the element when the heater is manufactured. This is
normal and does not indicate a problem with the unit. This con-
dition will stop after the heater has been in operation for a few
minutes.
Timed Fan Delay
The CFP25 heater has a timed fan delay. When the thermostat
calls for heat, fan action is delayed momentarily until the heat-
ing elements warm. This prevents the circulation of cold air.
When the heater raises the temperature of the room to the
thermostat set point, the heating element is turned off but the
fan will continue to run for a short time. This prevents exposing
the unit to residual heat, provides a higher comfort level and
prolonged element life.
Thermal Cutout
The CFP25 heater is also equipped with a thermal cutout
which will automatically shut off the heater in the event of over-
heating. The heater will turn on when the operating tempera-
ture returns to normal. Should the unit overheat and activate
the thermal cutout cycle, the cause of the overheating should
be determined before further operation.
MAINTENANCE
Cleaning the Heating Element
NOTE: Heater is installed in a concealed space. Unit should
be checked at least annually to verify operation and to clean
fan blades and elements.
To clean the heating element, open the bottom access panel
(Figure 3) and disconnect the two element wires from the time
delay . Remove the front outlet cabinet assembly by way of 4
screws ( Figure 6). Remove grille from back inlet (motor/fan
grille) by way of 4 screws. Remove the 4 screws mounting the
element assembly to the fan deck and remove element assem-
bly. Remove dust or lint with a soft brush or a vacuum cleaner.
Replace element assembly, inlet grille, outlet cabinet, and
reconnect element to time delay.
Cleaning the Fan and Motor
Remove the protective grille from the rear of the heater. This
provides access to the fan and motor. Wipe off the fan and
motor with a soft cloth or brush. The fan motor does not
require lubrication. Replace protective grille. (See Figure 6.)
G R
E E
N
(o
r
B ar
e
C
o p p er
)
W
HI
TE
BLA
CK
L1
L2
BOTTOM
VIEW
POWER
TERMINAL
BLOCK
Figure 5
RD
BK
1609-2131-000
REV. A
BLACK
RED
BLACK
BLACK
RED
RED
BLACK
RD
BK
RED
BLACK
MOTOR
TAP BOARD
L1
L2
HEATING ELEMENT
PRIMARY LIMIT
THERMOSTAT
CONTACTOR DPDT
BLACK
FAN DELAY
ALARM L2
ALARM L1
Figure 4 Wiring Diagram
CAUTION
USE CARE TO PREVENT DAMAGE TO INTERNAL HEATER
WIRING WHEN CLEANING ELEMENT. MAKE SURE ALL
CONNECTIONS REMAIN TIGHT AND ALL WIRING IS ROUT-
ED AWAY FROM ELEMENT FINS WHEN REASSEMBLING
THE UNIT. ALLOWING WIRING TO TOUCH THE ELEMENT
FINS COULD RESULT IN A FIRE HAZARD.
!
CAUTION
USE CARE TO PREVENT DAMAGE TO INTERNAL HEATER
WIRING. MAKE SURE ALL CONNECTIONS REMAIN TIGHT.
!
TO PREVENT POSSIBLE ELECTRICAL SHOCK, ALL
POWER MUST BE SHUT OFF AT THE MAIN SERVICE
BEFORE INSPECTING OR CLEANING.
WARNING
!
FAN AND MOTOR
SCREWS (4)
PROTECTIVE GRILL
SCREWS (4) FRONT CABINET
ASSEMBLY
Figure 6