Lennox GWB9

34
DRAFT INDUCER
CASTING TEMPERATURE
AQUASTAT
CONTROL
MICROPROCESSOR
ELECTRONIC
LOGIC & TIMERS
INDICATOR
VALVE
IGNITER
PURGE
POWER
5K
4K
3K
2K
1K
P3-7
W
SAFETY SWITCH
TRANSFORMER
R
P3-4
P3-6
P3-3
4K1 3K1
P2-1
P1-1
P1-3
P2-2
24
120
P3-1
L1
HOT
L2
P7-2
2K1
CIRCULATOR MOTOR
1K1
5K1
P6-1
P6-2
5K2
HOT SURFACE IGNITER
POWER SUPPLY
THERMOSTAT
1
1
POWER SUPPLY. PROVIDE
REQUIRED USE ONLY COPPER
DIFFERENTIAL AIR
P3-9
HIGH LIMIT
(MANUAL RESET)
PRESSURE SWITCH
4
5
1
3
VR8205A
P12-1 P12-2
LOCATION OF CONNECTOR PLUG
BETWEEN SCHEMATIC AND
BLK
WHT
AND THE UNIT
RECEPTACLE IS LIVE WHEN
* CAUTION:
*
ON/OFF SWITCH
1
2
3
1
P10-2
BOILER SWITCH IS OFF
LADDER DIAGRAM
NOTE: "P" LABEL REFERENCE
WIRE BETWEEN DISCONNECT
OVERLOAD PROTECTION AS
DISCONNECT MEANS AND
120 VOLT
VAC
VAC
LIGHTS
BLOWER
SAFETY SWITCH
TEMPERATURE
P3-5
P9-3
P9-2
P3-2
MV
MV
GAS VALVE
P4-1
P10-1
FLAME
1013-10 CONTROL
REFERENCES PLUG CONNECTION
P5-3
P7-1
P7-3
P4-3
P5-1
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