SECTION
Boiler Controls: Triple Aquastat (L8124A)
POWER SUPPLY CIRCUIT BREAKER
LOW VOLTAGE THERMOSTAT LOW VOLTAGE THERMOSTAT
L2 (NEUTRAL)
PRIMARY CONTROL
T T JUMPER TRIPLE 6 AQUASTAT 4 CONTROL 2 1 3 5
L1 (HOT) SERVICE OR EMERGENCY SWITCH
SWITCHING RELAY
12
T T
B 2 B1
C2 C1
T T
F F
15 technical information
CIRCULATOR
CIRCULATOR
IGNITION TRANSFORMER 24V WIRE
POWER IN B
W W
B
NOT SHOWN ADDITIONAL ZONE WIRING R845A RELAY
T
T
THERMOSTAT 24V
BURNER MOTOR
6
EMERGENCY SWITCH
WHT 2
2 WIRE
1
4
3
BLUE BLK
WHT
CIR
5
WHT
BLK
BLK
WHT
RED
4 WIRE
2 WIRE
WIRE R845A
T
T
BLK
WHT
L1
L2
WHT
BLUE
BLK
BLK
WHT BLK
T
T
WHT
THERMOSTAT 24V
WHT
2
1 BLUE
3
WHT
CIR
4
WHT
RED
BLK
B1
B2
RED
BLUE
ZC
WHT BLK
5 WHT
L8124A AQUASTAT RELAY
BLUE
6
ZR
C2
C1
BLK WHT
2 WIRE
BLUE WHT
BLK
2 WIRE
4 WIRE
CIR WHT BLK
B CAD CELL
W
1ST ZONE THERMOSTAT 24V
B
B
IGNITION TRANSFORMER
BURNER PRIMARY CONTROL
BB W OR B
BURNER MOTOR
F
F
T T
B = BLACK WIRE W = WHITE WIRE R = RED WIRE
F.W. Webb Heating Catalog
F.W. Webb Company
troubleshooting
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