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Jaguar Model J-390
20
GND
NEUTRAL
HOT
L2
L1
120V/60HZ
120V
10V
120V
24V
DISPLAY
WATER HIGH
LIMIT
"CALL F OR HEAT"
24V ROOM THERMOSTAT
DHW THERMOSTAT
(IF USED ) OR SENSOR
LOW WATER CUT OFF
(IF USED ) OR JUMPER
120V SECTION OF
CONTROL BOARD
MICRO
PROCESSOR
ON CONTROL
BOARD
OUTDOOR SENSOR
(IF USED)
FLUE G AS
SENSOR
RETURN WATER
SENSOR
SUPPLY WAT ER
SENSOR
GAS
VALVE
BOILER ON/OFF
SWITCH
COMBUSTION
BLOWER
BOILER
CIRCULATOR
DHW CIRCULATOR
(IF USED)
SPARK
ELECTRODE
DISCONNECT
SWITCH
CHASSIS
GND
OR ISOLATED CONTACT
COMBUSTION
BLOWER
M
M
Figure 15c. Ladder wiring diagram.