Weil-McLain LGB-23 - Manual (Page 6)

6
LGB-6 to LGB-23 Series 2 – Control Supplement
Part Number 550-141-916/1001
9. PILOT LEADWIRES ARE NOT FIELD REPLACEABLE. REPLACE PILOT ASSEMBLY IF NECESSARY.
IF ORIGINAL GROUND LEADWIRE AS SUPPLIED WITH THE APPLIANCE MUST BE REPLACED,
B. CANADA - C.S.A. C22.1 C.E.C. PART 1.
A. U.S.A. - N.E.C. CLASS 1.
2. ALL WIRING EXTERNAL TO BOILER JACKET MUST BE:
B. CANADA - C.S.A. C22.1 CANADIAN ELECTRICAL CODE PART 1 AND ANY OTHER
CODE REQUIREMENTS.
1. ALL WIRING MUST BE INSTALLED IN ACCORDANCE WITH:
ELECTRICAL SHOCK HAZARD, CAN CAUSE SEVERE INJURY OR DEATH.
DISCONNECT POWER BEFORE INSTALLING AND/OR SERVICING.
4. REFER TO CONTROL COMPONENT INSTRUCTIONS PACKED WITH BOILER FOR
ITS EQUIVALENT MUST BE USED. EXCEPTION, SEE NOTE 7.
APPLICATION INFORMATION.
3. IF ORIGINAL WIRE AS SUPPLIED WITH THE APPLIANCE MUST BE REPLACED, TYPE 105 C OR
NATIONAL, PROVINCIAL, OR LOCAL CODE REQUIREMENTS.
A. U.S.A. - NATIONAL ELECTRICAL CODE AND ANY OTHER NATIONAL, STATE, OR LOCAL
NOTES:
FOR LOW AND HIGH FIRE OPERATORS.
TYPE 125 C OR ITS EQUIVALENT MUST BE USED.
5. STANDARD EQUIPMENT FOR LGB-21 THRU LGB-23.
10. DENOTES FIELD INSTALLED CHASSIS GROUND.
6. TERMINAL ON MAIN GAS VALVE IS A SINGLE TERMINAL (COMMON)
7. REFER TO CONTROL SUPPLEMENT FOR GROUND LEADWIRE ATTACHMENT.
8. WIRES ARE FACTORY INSTALLED TO CONTROL PANEL, BUT MUST BE FIELD
CONNECTED TO GAS VALVES AND FIRING RATE CONTROL TERMINALS (WHEN USED).
11. ALL CONTACTS SHOWN WITHOUT POWER APPLIED - OFF SHELF CONDITION.
HIGH VOLTAGE FACTORY
IGNITION/SENSING CABLE
HIGH VOLTAGE FIELD
LOW VOLTAGE FACTORY
LOW VOLTAGE FIELD
FIELD WIRED TO GAS
CONTROL MODULE TERMINAL.
TRANSFORMER TERMINAL.
IGNITION CONTROL
VALVE OR FIRING RATE CONTROL.
MAIN GAS VALVE TERMINAL.
FIRING RATE CONTROL
(WHEN USED)
FIRING RATE CONTROL
NO. 1 BASE WIRING
WIRE NUTS (2)
TRANSFORMER
(SIZES 13 THRU 23)
NO. 2 BASE WIRING
(NOTE 5)
SWITCH
PRESSURE
(WHEN USED)
HIGH GAS
V.A.C.
W
120
V.A.C.
24
BK
C
R
GROUND
(NOTE 10)
EQUIPMENT
WIRE NUTS (3)
(NOTE 7) PILOT
PRE-WIRED PANEL
(NOTE 9)
BLOCK
TERMINAL
PILOT SOLENOID
VALVE
SPARK
UNIVERSAL
CONTROL
IGNITION
G
(NOTE 7)
G
(SIZES 6 THRU 23)
CUT-OFF
LOW WATER
(BY OTHERS)
SERVICE SWITCH
FROM TRANSFORMER
LIMIT CIRCUIT
STEAM
DISCONNECT
N
FROM
FUSED
H
JUNCTION
BOX
CONTROL
OPERATING
SWITCH
(NOTE 5)
HIGH GAS
PRESSURE
(WHEN USED)
TRANSFORMER
V.A.C.
24
W
V.A.C.
120
TO LIMIT CIRCUIT
BK
C
R
LOW WATER
OPERATING/LIMIT
FROM TRANSFORMER
WIRE NUTS (4)
CONTROL
COMBINATION
CONTROL
LIMIT
TEMPERATURE
NOT USED
WHEN L.W.C.O. IS
TO BE JUMPERED
THESE TERMINALS
CUT-OFF
PRE-WIRED PANEL
1 2
TERMINAL
BLOCK
PILOT SOLENOID
VALVE
SPARK
IGNITION
CONTROL
UNIVERSAL
MODULE
PILOT PROVING
G
PILOT
(NOTE 9)
(NOTE 7)
(NOTE 7)
G
SCHEMATIC WIRING DIAGRAM
LIMIT CIRCUIT
WATER
HIGH
MAIN FLAME
SENSOR
STAGE COMBINATION
MAIN GAS VALVE - TWO
VALVE W/REGULATOR
(WHEN USED)
R
BL W
WIRE TIE CLIP
(NOTE 8)
MAIN FLAME
SENSOR
STAGE COMBINATION
VALVE W/REGULATOR
MAIN GAS VALVE - TWO
BL W
R
WIRE TIE CLIP
(NOTE 8)
2 1
SPARK
MV/PV
(BURNER)
24V (GND)
24V
SENSE
GND
PV
MAIN FLAME
PROVING MODULE
MV
SENSE
SPARK
MV
MV/PV
GND
24V
24V (GND)
PV
(BURNER)
SPARK
MV/PV
(BURNER)
24V (GND)
24V
SENSE
GND
PV
MAIN FLAME
PROVING MODULE
MV
SENSE
SPARK
MV
MV/PV
GND
24V
24V (GND)
PV
(BURNER)
MODULE
PILOT PROVING
MV/PV
PV MV
MV/PV
PV MV
MV/PV
W BL W BL
MV/PV
MV PV
SECONDARY
GAS VALVE
BK
BK
W BL W BL
MV/PV
MV PV
SECONDARY
GAS VALVE
BK
BK
FACTORY WIRED TO CONTROL -
PANEL TERMINAL.
III
Wiring
– continued