Desa CD36TN-M - Manual (Page 21)

www.desatech.com 118531-01A 1
Blue
Variable
Fan Switch Fan Switch
(N.O.)
Green
White
On
110/115
V.A.C.
Blower
Motor
Black
Off
1
2
Black
FIREPLACE
INSTALLATION
Continued
3. Place the blower against the lower rear wall of
the firebox outer wrapper with the exhaust port
directed upward and the thermodisc positioned up
near the fireplace bottom. The thermodisc must
be oriented near the fireplace bottom as shown in
Figure 30, page 20, in order to sense temperature
and properly operate. The blower will be held in
position against the back wall by the magnets
incorporated onto the blower housing (see Figure
30, page 20).
4. Be certain that all wire terminals are securely at-
tached to terminals on blower motor and thermal
switch and that the screw for the thermodisc
bracket and green ground wire is tight.
5. Mount speed control box by placing plastic
control shaft through opening in switch
bracket (see Figure 28, page 19).
6. While supporting speed control, secure control
shaft with lock nut by pushing and turning lock
nut with pliers clockwise until it is tight against
mounting plate. Place control knob provided on
shaft (see Figure 28, page 19).
7. Check to make sure that power cord is com-
pletely clear of blower wheel and that there are
no other foreign objects in blower wheel. Also
double check all wire leads and make sure
wire routing is not pinched or in a precarious
position. Correct accordingly.
8. Turn on power to duplex outlet if previously
turned off per warning in column 1, page 19.
9. Plug in blower power cord to duplex outlet.
10. The blower will only run when the speed control
knob is in the ON position and the thermal switch
senses temperature after the fireplace begins to
heat up. The blower speed can be adjusted by
rotating the control knob. To turn off, turn knob
fully counterclockwise until it clicks off. If the
blower is ON and has been running with the
fireplace operating, the blower will continue to
run for a short time after the fireplace has been
turned off. As the thermal switch cools down,
the blower shuts down automatically.
11. Peel off the backing paper and stick the sup-
plied wiring diagram decal on the firebox bot-
tom approximately 12" in front of the blower
(see Figure 29, page 20).
WIRING DIAGRAMS
CAUTION: Label all wires
prior to disconnection when
servicing controls. Wiring errors
can cause improper and dan-
gerous operation. Verify proper
operation after servicing.
Figure 31 - Blower Wiring Diagram for
Thermostat-Controlled Models
DO NOT CONNECT
RED
REPLACE F
ACT
OR
Y
WIRING WITH 105°C
EQUIV
ALENT
OR HIGHER RA
TIN
G
THERMOS
TA
T
WIRE 18 GA. RED/WHITE
EXTERNA
L
WIRING USE ONL
Y
CLASS
2
WHITE TH/TP TP TH
W
ALL
SWITC
H
TO
120V
THERMOPILE
PILO
T
BURNER
IGNI
TO
R
LIN
E
PILO
T
GAS
O F F
PIL OT
ON
PILO
T
SAFET
Y
VA
LV
E
MAIN GAS INCOMING SUPPL
Y
Figure 32 - Millivolt Ignition Wiring
Diagram