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Part Number 550-141-816/07986
LGB-6 to LGB-20 Series 2 – Control Supplement
Part Number 550-141-816/0798 7
CSD-1 Control System – Propane gas
Figure 3
Wiring diagram
SENSOR
MAIN FLAME
FIRING RATE CONTROL
(WHEN USED)
STAGE COMBINATION
VALVE W/REGULATOR
MAIN GAS VALVE - TWO
MAIN GAS VALVE TERMINAL.
FIELD WIRED TO GAS VALVE OR FIRING
IGNITION CONTROL PANEL TERMINAL.
TRANSFORMER TERMINAL.
CONTROL MODULE TERMINAL.
FACTORY WIRED TO CONTROL -
24120
DISCONNECT
A. U.S.A. - NATIONAL ELECTRICAL CODE AND ANY OTHER NATIONAL, STATE, OR LOCAL
3. IF ORIGINAL WIRE AS SUPPLIED WITH THE APPLIANCE MUST BE REPLACED, TYPE
ELECTRICAL SHOCK HAZARD, CAN CAUSE SEVERE INJURY OR DEATH.
A. U.S.A. - N.E.C. CLASS 1.
APPLICATION INFORMATION.
105 DEGREES C OR ITS EQUIVALENT MUST BE USED. EXCEPTION, SEE NOTE 6.
4. REFER TO CONTROL COMPONENT INSTRUCTIONS PACKED WITH BOILER FOR
DISCONNECT POWER BEFORE INSTALLING AND/OR SERVICING.
1. ALL WIRING MUST BE INSTALLED IN ACCORDANCE WITH:
B. CANADA - C.S.A. C22.1 CANADIAN ELECTRICAL CODE PART 1 AND ANY OTHER
2. ALL WIRING EXTERNAL TO BOILER JACKET MUST BE:
B. CANADA - C.S.A. C22.1 C.E.C. PART 1.
NOTES:
NATIONAL, PROVINCIAL, OR LOCAL CODE REQUIREMENTS.
CODE REQUIREMENTS.
TRANSFORMER
WIRE NUTS (2)
24
V.A.C.
120
W
V.A.C.
BK
C
R
N
EQUIPMENT
GROUND
(NOTE 9)
V.A.C.
WIRE NUTS (3)
W
V.A.C.
C
HIGH VOLTAGE FACTORY
10. ALL CONTACTS SHOWN WITHOUT POWER APPLIED - OFF SHELF CONDITION.
CONNECTED TO GAS VALVES AND FIRING RATE CONTROL TERMINALS (WHEN USED).
7. WIRES ARE FACTORY INSTALLED TO CONTROL PANEL, BUT MUST BE FIELD
6. REFER TO CONTROL SUPPLEMENT FOR GROUND LEADWIRE ATTACHMENT.
5. TERMINAL ON MAIN GAS VALVE IS A SINGLE TERMINAL (COMMON)
IF ORIGINAL GROUND LEADWIRE AS SUPPLIED WITH THE APPLIANCE MUST BE REPLACED,
8. PILOT LEADWIRES ARE NOT FIELD REPLACEABLE. REPLACE PILOT ASSEMBLY IF NECESSARY.
9. DENOTES FIELD INSTALLED CHASSIS GROUND.
TYPE 125 C OR ITS EQUIVALENT MUST BE USED.
FOR LOW AND HIGH FIRE OPERATORS.
11. ALARM CONTACT RATINGS - 15 AMP @ 250 VAC.
MV/PV
IGNITION/SENSING CABLE
PANEL LAMP
RATE CONTROL.
NO. 2 BASE WIRING
(SIZES 13 THRU 20)
HIGH GAS
(WHEN USED)
SWITCH
PRESSURE
(NOTE 8)
PILOT
LOW VOLTAGE FIELD
HIGH VOLTAGE FIELD
LOW VOLTAGE FACTORY
WATER
LWCO
RESET
MANUAL
FROM TRANSFORMER
LIMIT CIRCUIT
TO LIMIT CIRCUIT
SERVICE SWITCH
(BY OTHERS)
H
FROM
FUSED
TRANSFORMER
BK
R
FROM TRANSFORMER
TEMPERATURE
OPERATING/LIMIT
CONTROL
COMBINATION
RESET
MANUAL
HIGH LIMIT
STEAM
LIMIT CIRCUIT
LOW WATER
BOX
JUNCTION
OPERATING
CONTROL
CUT-OFF
WIRE NUTS (4)
RESET
HIGH
LWCO
LIMIT
MANUAL
RESET
HIGH LIMIT
MANUAL
(NOTE 8)
(SIZES 6 THRU 20)
NO. 1 BASE WIRING
SOLENOID
SWITCH
(WHEN USED)
PRESSURE
HIGH GAS
NOTE 11
PILOT
MV
MV/PV
PV
R
NOTE 6
W
BL
NO.1 RED FLAME FAILURE LAMP
PILOT
SCHEMATIC WIRING DIAGRAM
PILOT PROVING MODULE
A United Dominion Company
Michigan City, IN 46360-2388
550-141-835/0798WM
PILOT PROVING MODULE
LGB
Propane Gas
NO. 2 BASE
PART NUMBER
Steam or Water
Intermittent Pilot
CSD-1 Control System
6 thru 20
Weil-McLain
500 Blaine St.
HIGH GAS
(WHEN USED)
SWITCH
PRESSURE
MAIN FLAME PROVING MODULE
NO. 2 BASE
R
OPERATOR (NOTE 5)
MAIN GAS VALVE HIGH FIRE
(NOTE 5)
MV/PV
SECONDARY GAS VALVE
PILOT SOLENOID VALVE
MAIN GAS VALVE LOW FIRE OPERATOR
(WHEN USED)
NOTE 11
ALARM
ALARM
24V
(WHEN USED)
SWITCH
PRESSURE
HIGH GAS
SENSE
NO. 1 BASE
SPARK
(GND)
24V
PV
1
N/A
SEE
NO. 1 BASE
PILOT FLAME SENSOR
MAIN FLAME PROVING MODULE
PILOT BURNER
(NOTE 8)
2
ALARM
ALARM
(GND)
SENSE
24V
24V
PV
MV/PV
MV
MAIN FLAME SENSOR
PV
MV
(STEAM ONLY)
LADDER WIRING DIAGRAM
LOW WATER
CUT-OFF
(BY OTHERS)
R
SERVICE SWITCH
R
OPERATING
CONTROL
H
FIRING RATE CONTROL
120 V.A.C.
MANUAL
LWCO
RESET
RESET
MANUAL
HIGH LIMIT
24 V.A.C.
PRIMARY
HIGH
LIMIT
PRIMARY
24 V.A.C.
MV/PV
GROUND
C
C
(NOTE 9)
EQUIPMENT
N
AA
21
VALVE
R
N/A
SPARK
SENSE
(GND)
24V
PV
1
24V
ALARM
ALARM
SENSE
PV
NOTE 11
A
1
A
2
SEE
MV/PV
MV
PILOT SOLENOID VALVE
MV/PV
(NOTE 5)
MAIN GAS VALVE LOW FIRE OPERATOR
MAIN GAS VALVE HIGH FIRE
OPERATOR (NOTE 5)
MV/PV
PILOT FLAME SENSOR
PILOT BURNER
(NOTE 8)
MAIN FLAME SENSOR
2
(GND)
24V
ALARM
ALARM
24V
PV
FIRING RATE CONTROL
(WHEN USED)
MV
SOLENOID
VALVE
PILOT
NOTE 11
NOTE 6
R
VALVE W/REGULATOR
STAGE COMBINATION
MAIN GAS VALVE - TWO
MV
MV/PV
PV
BL
W
FIRING RATE CONTROL
(WHEN USED)
MAIN FLAME
SENSOR
NO.2 RED FLAME FAILURE LAMP
MV/PV
MV
MV/PV
MV
MOMENTARY
SWITCH
R
TERMINAL
BLOCK
24 V
IGNITION CONTROL
SPARK
SENSE
SPARK
24V (GND)
PILOT PROVING
MODULE
MV/PV
MV
ALARM
ALARM
PV
PRE-WIRED PANEL
12
A
1
A
2
IMPULSE
RELAY
IGNITION CONTROL
SENSE
24V (GND)
PROVING MODULE
MAIN FLAME
ALARM
24 V
ALARM
PV
MV/PV
MV
WIRE TIE
CLIP
MOMENTARY
SWITCH
R
TERMINAL
BLOCK
24 V
IGNITION CONTROL
SPARK
SENSE
SPARK
24V (GND)
PILOT PROVING
MODULE
MV/PV
MV
ALARM
ALARM
PV
PRE-WIRED PANEL
12
A
1
A
2
IMPULSE
RELAY
IGNITION CONTROL
SENSE
24V (GND)
PROVING MODULE
MAIN FLAME
ALARM
24 V
ALARM
PV
MV/PV
MV
WIRE TIE
CLIP
THERMOCOUPLE LEAD
BOX
SWITCH
PILOT
THERMOCOUPLE
THERMOCOUPLE
SWITCH
PILOT
BOX
PILOT
STANDING
SWITCH
PILOT
BOX
PILOT
STANDING
THERMOCOUPLE
SWITCH
PILOT
BOX
THERMOCOUPLE
MV/PV
PV
SECONDARY GAS VALVE
MV/PV
PV
BLW
WBL
MV/PV
MV
PV
SECONDARY
GAS VALVE
BK
BK
BLW
WBL
MV/PV
MV
PV
SECONDARY
GAS VALVE
BK
BK