Carrier B Series - Page 16

Fig. 14—Wiring Diagrams for Intermittent Ignition Boilers with Float-Type Low Water Cut-Off
NOTE: If any of the original wire as supplied with this appliance must be replaced, it must be replaced with type 105°C thermoplastic
wire or its equivalent.
A03104
VENT DAMPER
MOLEX PLUG
4123
BK
BR
OY
115V/60HZ/1Ø
POWER SUPPLY
NEUT
HOT
OVERCURRENT PROTECTED
DISCONNECT
24 VOLT
TRANSFORMER
BK
W
BK
BT
1
3
2
OPTIONAL WF-2U-24
WATER FEEDER
t´
BK
O
THERMOSTAT
PRESSURE LIMIT
Y
BK
LOW WATER
CUT OFF
1
24
3
BK
FLAME ROLLOUT
SAFETY SHUTOFF
BLOCKED VENT
SAFETY SHUTOFF
NOTE:
TERMINAL NO. 3 APPEARS ONLY
ON WATER FEEDER MODELS WITH
MANUAL FEED PUSH BUTTON.
UT 1003-620 SERIES
INTERMITTENT PILOT CONTROL
COLOR CODE
BK
BR
0
Y
R
BT
W
G
- BLACK
- BROWN
- ORANGE
- YELLOW
- RED
- BLACK WITH TRACER
- WHITE
- GREEN
- WIRE NUT
OVERCURRENT
PROTECTED
DISCONNECT
FLAME ROLLOUT
SAFETY
SHUTOFF
BLOCKED VENT
SAFETY
SHUTOFF
P1-01
W
24 V.
SECONDARY
BK
BK
BT
Y
P1-04
NOTE:
1) S1A AND S1B ARE THE AUTOMATIC
OPERATION / HOLD DAMPER OPEN SWITCH.
SWITCH SHOWN IN AUTOMATIC POSITION.
S2, S3, AND S4 ARE CAM ACTUATED SNAP SWITCHES.
VENT DAMPER CABLE
4 POLE CONNECTOR
P1-03
P1-02
THERMOSTAT
NEUTRAL
HOT
115V/60HZ/1Ø
PRESSURE
LIMIT
120 V.
PRIMARY
TO
VENT
DAMPER
BR
O
BK
2
1
LWCO
MV MV/PV PV
(24V)
GND.
(24V) (GND.) SPARK
RGW BK BK BT BL
TO PILOT BURNER
GAS VALVE
VR8204A / VR8304M
R
G
W
GND.
PV
PV/MV
MV
BK
PV
GND.
PV/MV
MV
GAS VALVE
VR8204A / VR8304M
UT 1003-620 SERIES
INTERMITTENT PILOT CONTROL
RGW BK BTBK
MV MV/PV PV
GND.
(24V) (GND.)
(24V)
SPARK
TO PILOT BURNER
W
G
R
BL
BK
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