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XTS Series - 4" Tube Heater Installation, Operation, Maintenance and Parts Manual
Alternative Wiring Diagrams
For 24VAO (Internal Relay Option), and Retail Super Centers.
T-STAT
TERMINAL
24V
L1
120VAC
L2
If any of the original wire as supplied with the appliance must be replaced, it must
be replaced with wiring material having a temperature rating of at least 105°C.
For Obsolete Dual Switch Line Voltage, and 24VAO.
T-STAT
TERMINAL
24V
L1
120VAC
L2
BLOCK DIAGRAM - MARK17DU-117 WITH LIGHTS
TERMINAL BLOCK
BK
BK
BK
BK
BK
W
BLOWER
BLOCK DIAGRAM - MARK17DU-117 WITH LIGHTS
BK
TERMINAL BLOCK
PRESSURE
SWITCH
BK
BK
BK
BK
BK
W
BLOWER
BK
PRESSURE
SWITCH
BK
W
INDICATOR
LIGHTS
M
1
C
2
BK
P
3
M
1
C
2
3
P
NO
OFF
GAS VALVE
O
BK
W
INDICATOR
LIGHTS
M
1
C
2
BK
P
3
M
1
C
2
P
3
NO
OFF
GAS VALVE
7
BURNER
O
IGNITOR
BK
PROBE
SIC1
LINE1
TH
W
NEUT
R
VALVE
W
NEUT
G
GND
BURNER
IGNITOR
BK
MARK 17DU-117
PROBE
SIC1
LINE1
TH
W
NEUT
R
VALVE
W
NEUT
G
GND
FLAME
ROD
BR
MARK 17DU-117
IGNITION
MODULE
LLWT39
FLAME
ROD
BR
IGNITION
MODULE
LLWT23
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