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125205-01E
23
INSTALLATION
Continued
Var
iabl
e
Fan
Sw
itch
W
hite
W
hite
Bla
ck
Gr
een
On
110
/11
5
V.A
.C.
Blo
we
r
Mo
tor
Bla
ck
Bla
ck
Bla
ck
Of
f
Figure 43 - Location of Wiring Diagram
Decal (Model May Vary From Illustration)
Wiring Diagram Decal
12" in Front of Blower
BLOWER WIRING DIAGRAM
Figure 44 - Blower Wiring Diagram for
Thermostat-Controlled Models
Blue
Variable
Fan Switch
Fan Switch
(N.O.)
Green
White
On
110/115
V.A.C.
Blower
Motor
Black
Off
1
2
Black
DO NO
T
CONNECT TO
120V
RE
D
REPLACE
FA
CT
OR
Y
WIRING WITH 105°
C
EQUI
VA
LENT
OR
HIGHER RA
TIN
G
EXTERNA
L
WIRIN
G
USE ON
LY
CLASS
2
THERMOST
AT
WIRE
18 GA. RED/WHITE
WHITE
TH/TP
TP
TH
WA
LL
SWITC
H
THERMOPILE
PILO
T
BURNE
R
IGNIT
OR
PILO
T
GA
S
LINE
O
F F
PIL
OT
ON
PILO
T
SAFET
Y
VA
LV
E
INCOMING MAIN GA
S
SUPPL
Y
Figure 45 - Millivolt Ignition Wiring Diagram
BURNER FLAME ADJUSTMENT
WARNING: Improper installa
-
tion, adjustment, alteration, ser
-
vice or maintenance can cause
injury or property damage. Refer
to this manual for assistance.
Consult a qualified installer for
additional information.
Burner flame adjustment (shutter opening)
has been factory preset (for natural gas) to
proper air-to-gas ratio. This ratio results in an
even, clean burning flame across burner (see
Figure 46, page 24).
If adjustment is necessary, you can restore
proper flame setting by loosening air shutter
screw and rotating air shutter until proper
setting is achieved (see Figure 47, page 24).
Correct shutter openings are 3/16'' for natural
gas and fully open for propane/LP gas.
Tube Burner
Pan Burner
Model
NG
LP
NG
LP
CD36M-LS 0.188"
Max
—
—
CD42M-LS 0.188" 0.313" 0.188" 0.500"
9. Check to make sure that power cord is
completely clear of blower wheel and
that there are no foreign objects in blower
wheel. Turn blower on and check for op-
eration. Turn blower off by turning knob
fully counterclockwise before continuing.
10. Peel off backing paper and stick supplied
wiring diagram decal on firebox bottom
approximately 12" in front of blower (see
Figure 43).