Honeywell ST9103A - Manual (Page 3)

S9103A ELECTRONIC FAN TIMER
3 69-0771B
Fig. 2. ST9103A internal schematic.
K2 COOL
ST9103A OIL
ELECTRONIC
FAN TIMER
R
W
Y
G
C
THERMOSTAT
C
N2
M1
M2
CN6-9
K1
CIRCULATION
BLOWER
R8991
OIL PRIMARY
CONTROL
NOTE: DOTTED LINES REPRESENT PRINTED CIRCUIT BOARD WIRING. M5552
ELECTRONIC
AIR CLEANER
(OPTIONAL)
TO 120 VAC
POWER SUPPLY
R8991
LIMIT SENSOR
CIRCULATION
BLOWER
K1 K2 R8991
CONTROL
K3
MED
HIGH
LOW
FUSE
INTERLOCK
S2
N3
K2 HEAT
K1
CONSTANT
MED-HIGH
N1
LIMIT
CN6-1
1
CN6-2 CN6-4
L1 L2
CN6-7
T1 T2
R8891
CN6-6 CN6-3
X
24 VAC
120 VAC
S1
BURNER
MOTOR
HUMIDIFIER
(OPTIONAL)
ACCESSORY
(OPTIONAL)
S3
CN6-8 CN6-5
N7
N4
N6
HUM
1 DENOTES OPTIONAL CONNECTIONS, COMPONENTS AND ACCESSORIES.
1
1
1