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7 68-0063—3
L8104A,B,C,D
INSTALLATION
Fig. 7—L8104B with remote potentiometer in a standing pilot application.
Fig. 8—L8104B with board-mounted potentiometer in an electronic ignition application.
M130C
POWER SUPPLY. PROVIDE DISCONNECT
MEANS AND OVERLOAD PROTECTION
AS REQUIRED.
FACTORY JUMPER INSTALLED, DO NOT
REMOVE.
1/4 IN. TAB TERMINALS (3).
3/16 IN. TAB TERMINALS (5).
SENSING BULB WITH
ECO SWITCH
SENSING BULB
1
L1
(HOT)
L2
1
2
3
4
2
4
4
4
4
3
3
3
4
L8104B
BLACK
BLACK
BLACK
BLACK
RED
RED
SEN-1
LOWER
24V
ONLY
HOT
COM.
RELAY
NO
ECO
CONNECTOR
TH TR
VR8200
GAS VLAVE
24V
Q308
1
2
3
SETPOINT
POTENTIOMETER
(SHOWN FROM BACK)
UPPER
SEN-2
POT
M129B
POWER SUPPLY. PROVIDE DISCONNECT
MEANS AND OVERLOAD PROTECTION
AS REQUIRED.
SENSING BULB WITH
ECO SWITCH
SENSING BULB
1
L1
(HOT)
L2
1
2
3
4
2
4
4
4
4
4
3
3
3
L8104B
BLACK
BLACK
BLACK
BLACK
RED
RED
SEN-1
LOWER
24V
HOT
ONLY
COM.
RELAY
NO
24V
UPPER
SEN-2
1
4
0
120
160
180
100
1ST
OPERATOR
2ND
OPERATOR
PILOT
VALVE
COM
MAIN
VALVE
VR8440 OR
VR844
S8600F,H,M;
S8610F,H
MV MV/PV PV
GND
(BURNER)
24V
GND
24V
TH-W
(OPT)
SPARK
VENT
DAMPER
PLUG (OPT)
TERMINAL DESIGNATIONS
GAS CONTROL
VR844, VR8440
PILOT COM MAIN
TH TH-TR TR
1/4 IN. TAB TERMINALS (3).
3/16 IN. TAB TERMINALS (5).