Bryant BW9 - Page 22

Fig. 19—Ladder Wiring Diagram
A99305
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED
NOTE: "P" LABEL REFERENCE LOCATION OF
CONNECTOR PLUG
BETWEEN SCHEMATIC AND LADDER DIAGRAM
USE ONLY COPPER WIRE BETWEEN DISCONNECT
AND THE
UNIT
RECEPTACLE IS LIVE WHEN BOILER SWITCH IS OFF
*
CAUTION:
REFERENCES PLUG
CONNECTION
*
RECEPTACLE
DRAFT
INDUCER
CASTING TEMPERATURE
AQUASTAT
CONTROL
MICROPROCESSOR
ELECTRONIC
LOGIC & TIMERS
INDICATOR LIGHTS
VALVE
IGNITER
PURGE
POWER
5K
4K
3K
2K
1K
P3-7
W
SAFETY SWITCH
TRANSFORMER
R
P3-4
P3-6
P3-3
P3-54K1 3K1
P3-2
P2-1
P1-1
P1-3
P2-2
24 VAC
120 VAC
P3-1
L1
HO
T
L2
P7-2
2K1
CIRCULATOR
MOTOR
1K
1
5K1
P6-1 P6-2 5K2
HOT SURFACE IGNITER
120 VOLT POWER SUPPLY
THERMOSTAT
1
DIFFERENTIAL AIR
P3-9
HIGH LIMIT
(MANUAL RESET)
BLOWER TEMPERATURE
SAFETY SWITCH
PRESSURE SWITCH
4
5
1
3
MV MV
GAS VALVE
VR8205A
P12-1
P12-2
P9-2
P9-3
BLK
WHT
P10-1
P5-3
P4-3
P7-3
P4-1
P7-1
P5-1
P10-2
FLAME
1013-10
CONTROL
ON/OFF
SWITCH
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