User Guide

V4943/V8943B,C,N; V4944/V8944B,C,L,N REGULATING DIAPHRAGM GAS VALVES
65-0214—5 8
Wiring
WARNING
Electrical Shock Hazard.
Can cause serious injury, death or equipment
damage.
Disconnect the power supply before making
connections to prevent electrical shock and equipment
damage.
1. All wiring must comply with applicable electrical codes,
ordinances and regulations. Use NEC Class 1 (line
voltage) wiring.
2. For normal installations, use moisture-resistant No. 14
wire suitable for at least 167°F (75°C) when using a
flame safeguard primary control, or for at least 194°F
(90°C) when using a flame safeguard programming
control.
3. For high temperature installations, use
moisture-resistant No. 14 wire selected for a temperature
rating above the maximum operating temperature.
4. Check the power supply circuit. The voltage and
frequency must match those of the valve.
5. See Fig. 11 through 14 for typical field wiring
connections. Follow the burner manufacturer wiring
diagram, if provided.
6. Make wiring connections at the electrical wires provided
at the top of the valve.
CAUTION
Equipment Damage Hazard.
Miswiring can cause equipment damage.
1. Label all wires prior to disconnection when servicing
valves. Wiring errors can cause damage to the
equipment through improper and dangerous
operation.
2. Verify proper operation after servicing.
3. After the installation is complete, cycle the valve
several times with the manual fuel shutoff cock
closed. Make sure the valve and actuator function
properly.
4. If the installation is gas tight and functioning properly,
proceed to the Checkout section.
Fig. 11. Typical wiring diagram for V4943B,N.
Fig. 12. Typical wiring diagram for V8943B,C,N.
Fig. 13. Typical wiring diagram for V4944B,C,L,N with three
leadwire electrical termination.
Fig. 14. Typical wiring diagram for V8944B,C,L,N with three
leadwire electrical termination.
L1
(HO
T)
L2
1
LIMIT(S)
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
M6887
FLAME
SAFEGUARD
CONTROL
1
JUNCTION
BOX
LINE VOLTAGE
THERMOSTAT
OR CONTROLLER
V4943B,C,N
SINGLE-STAGE
VALVE
PV
PV
MV
BLACK ORANGE
L1
(HOT)
L2
1
LIMIT(S)
TRANSFORMER
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
M6888A
24-VOLT
THERMOSTA
T
FLAME SAFEGUARD
CONTROL
V8943B,C,N
SINGLE-STAGE
VALVE
PV
PV
MV
ORANGE
BLACK
L1
(HOT)
L2
1
LIMIT(S)
FLAME
SAFEGUARD
CONTROL
TWO-STAGE
CONTROLLER
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
M6886A
COM
STG 1 STG 2
ORANGE
BLACK BLUE
V4944B,C,L,N
TWO-STAGE VALVE
PV
PV
MV
MV
L
1
H
OT
L
2
1
LIMIT(S)
FLAME
SAFEGUARD
CONTROL
PV MV
PV
MV
TWO-STAGE
CONTROLLER
TRANSFORMER
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
M6889A
V8944B,C, L, N
TWO-STAGE VALV
E
ORANGE
BLACK
BLUE
2
2
V8944B1050, V8944B1068, V8944B1076, V8944B1084,
V8944C1041, V8944C1058, AND V8944C1066 HAVE A
MOLEX® CONNECTOR WITH 72 IN. (1829 MM) LEAD
WIRES: ORANGE (MV), PINK (PV), GREY (COM).