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V9055A,D
WIRING • ADJUSTMENTS
Fig. 5—Hookup of V9055 for firing rate control
with a 4-20 mA input.
12
15
12
10
13
11
14
14
TERMINALS OF 203422C ADAPTER.
TERMINALS TO V9055.
[ ]
TERMINALS OF R4140 OR BC7000.
TERMINALS OF RM7800.
203422C—V9055 ADAPTER (FOR 4-20 mA INPUT)
INSTALLATION
The 203422C Adapter Board allows the V9055 Modulat-
ing Fluid Power Gas Valve Actuator to be controlled with a
4-20 dc mA input. The adapter mounts in the wiring com-
partment and provides screw terminals for field wiring.
1. Remove the screws from terminals R,B and W on the
V9055 Actuator.
2. Position the adapter board to the R, B and W terminals
and install and tighten three screws (four screws provided in
bag assembly) to the R, B, and W terminals.
3. Connect field wiring from 4-20 mA controller to the +
and - terminals on the 203422C adapter board Be sure to
observe polarity.
CAUTION
Be sure to observe polarity from the controller to
the 203422C Adapter Board.
4. Reconnect power.
5. With manual shutoff gas valve Closed, apply power to
the V9055 and check its operations with the 4-20 mA
IMPORTANT: When using the V9055D with the V5055C
or E (two seals) Valves, match low-fire minimum
adjustment to the burner and the application. Too low
of an adjustment could result in loss of burner flame.
Also plan to check this low-fire adjustment at periodic
maintenance intervals.
ADJUST LOW-FIRE SETTING
The low-fire setting is adjustable from approximately
0.14 to 0.65 inch valve stem travel (with respect to V5055B
Gas Valve). The low-fire adjustment is factory-set at the
60-2311—6
+
[B]
+
–
–
[R]
4 – 20 m A
CONTROLLER
[W]
M2494A
temperature controller by manually incrementing and
decrementing the output—4 mA input will drive the V9055
to low-fire position; 20 mA drives to high-fire. Assure
V9055 completes a full stroke.
6. Turn manual shutoff gas valve to the open position and
test the remainder of the system for proper operation.
7. If the V9055 is being used for firing rate control,
connect system according to the drawing in Fig. 5.
8. Sequence the burner through a normal startup.
CAUTION
Label all wires prior to disconnection when servic-
ing valves. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing.
Fig. 6—V9055 connected to R4795 in typical
application.
SERIES 90
PROPORTIONING
CONTROLLER
V9055
ACTUATOR
R4795 FLAME SAFEGUARD
PRIMARY CONTROL
8
5
AIR
4
7
SWITCH
6
3
X
F
1
FLAME
DETECTOR
G
X
2
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
maximum position (approximately 50 percent of full gas
flow capacity). Refer to form 70-8311 for valve flow (capac-
ity) curves. Check to be sure the low-fire setting is at
maximum (fully clockwise) before starting the adjustment
procedure. To adjust:
1. Remove the lead to the V9055 terminal R. Jumper
terminal R to W. This will prevent the actuator from going to
the high-fire position.
2. Using a Phillips screwdriver, turn the low-fire adjust-
ing screw to the desired low-fire position. Do not push
inward on screw.
6
W
R
B
R
W
B
1
2
IGNITION
PILOT
VALVE
L1
(HOT)
CON-
LIMIT
TROLLER
1
L2
FAN
MOTOR
M7324
Adjustments
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