→
Fig.
4—Wiring
Diagram
(120-20)
A98061
UNUSED
LO
ML
MH
HI
C
STANDARD HEAT / COOL WIRING DIAGRAM
WITH ST9103 ELECTRONIC FAN TIMER
1
OIL INPUT : 0.85 USGPH
COOLING CAPACITY; 4 TONS MAX.
*
JUMPER: USE JUMPER ONLY WHEN THE COOLING
AND HEATING SPEEDS ARE SAME
OIL INPUT : 1.10 USGPH
COOLING CAPACITY : 5 TONS
OIL INPUT : 1.00 USGPH
COOLING CAPACITY : 4 TO 5
TONS MAX.
LEADS
123
3
H U M
45
6
N
7
2
S
E A C
C O N T
C O O L
H E A T
C
X
WY
R
G
W
RYC
G
L1
T
L2
O
T
F
F
FUSE
CAPACITOR
WHITE
BLACK
BLACK
BLACK
WHITE
LIMIT
CONTROL
RED
RED
YELLOW
BLUE
OIL PRIMARY
CONTROL
CAD CELL
BLACK
WHITE
ORANGE
THERMOSTAT
RED
BLUE
BLACK
BURNER
MOTOR/
TRANSFORMER
R99G001
ST9103
120 VAC
24 VAC
L1 (H)
L2 (N)
120 VAC POWER SUPPLY
CONSTANT LOW SPEED SWITCH
CIRCULATING
FAN
BLACK
TRANS
WHITE
VIOLET
ON
1 2
UNUSED
LO
ML
MH
HI
C
LEADS
123
3
H U M
45
6
N
7
2
S
E A C
C O N T
C O O L
H E A T
CAPACITOR
WHITE
RED
BLUE
BLACK
R99G001
ST9103
CONSTANT LOW SPEED SWITCH
CIRCULATING
FAN
BLACK
WHITE
UNUSED
LO
ML
MH
HI
C
LEADS
123
3
H U M
45
6
N
7
2
S
E A C
C O N T
C O O L
H E A T
CAPACITOR
WHITE
RED
BLUE
BLACK
R99G001
ST9103
CONSTANT LOW SPEED SWITCH
CIRCULATING
FAN
BLACK
WHITE
1
2
3
115 VAC 10 60Hz POWER SUPPLY
(FUSED DISCONNECT ON HOT LEG)
ELECTRONIC AIR CLEANER
L1(H)
S2
EAC
K2
K2
K1
K1
COOL
CIRCULATION
BLOWER
HEAT
CN6-9
LIMIT(S)
CN6-1
CN6-2
CN6-4
CONT
L1
L2
UNUSED MOT. LEAD
HI
LO
C
MH
ML
N6
N3
L2(N)
OIL PRIM CONTROL
HUMIDIFIER
LIMIT SENSE
R
W
Y
C
PRIM
CONTROL
ST9103A ELECTR. FAN TIMER
K3
120VAC
24VAC
BURNER MOTOR & TRANSFO.
CN6-7
CN6-8
CN6-6
T1
T2
PRIMARY
THERMOSTAT
CN6-3
S3
N4
CX
CN6-4
HUM
N7
TRANS
COOL
CONT
HEAT
CIRCULATION
BLOWER
UNUSED MOT. LEAD
HI
LO
C
MH
ML
COOL
CONT
HEAT
CIRCULATION
BLOWER
UNUSED MOT. LEAD
MH
LO
C
ML
HI
2
3
* JUMPER
* JUMPER
GND
GND
G
CIRCULATION
BLOWER
K1
K2
HUM TERMINAL IS 115V
HUM
TERMINAL
IS 115V
HUM
TERMINAL
IS 115V
8
