V4062A,B,D HI-LO-OFF FLUID POWER GAS VALVE ACTUATOR

60-2099—8 6
Fig. 4. Typical hookup for V4062 Actuator.
Fig. 5. Connecting Max Flow Limit Switch
to the actuator.
2
1
4
3
5
6
2
1
34
AUXILIARY
SWITCH
L1
HOT L2
POWER FROM FLAME SAFEGUARD CONTROL.
ACTUATOR OPENS TO LOW-FIRE POSITION WHEN FIRING RATE
CONTROLLER SWITCH IS OPEN AND LINE VOLTAGE IS SUPPLIED
TO TERMINALS L1 AND L2. ACTUATOR OPENS FULLY WHEN THE
FIRING RATE CONTROLLER SWITCH IS CLOSED AND POWER IS
SUPPLIED TO TERMINALS L1 AND L2.
3INTERNAL JUMPER.
4FOR LOW-FIRE ADJUSTMENT AFTER BURNER IS IN OPERATION.
DISCONNECT FIRING RATE CONTROLLER LEADWIRE FROM
TERMINAL 4.
5SWITCH BETWEEN THESE TWO LEADS IS CLOSED WHEN VALVE IS
SHUT (DE-ENERGIZED).
6SWITCH BETWEEN THESE TWO LEADS IS OPEN WHEN VALVE IS
SHUT (DE-ENERGIZED).
NO
NC
C
NO
NC
C
5
6
1
2L2
FIRING
RATE
CONTROLLER
FLAME SAFEGUARD
PROGRAMMER–MAIN
VALVE CONNECTIONS
PROOF-OF-
CLOSURE SWITCH
M7339
ADJUSTMENTS

Low-Fire Adjustment

The low-fire position is adjustable from 0.16 in. to 0.64 in.
(with respect to V5055/V5097B Valve) valve stem travel. A
dial on the low-fire cam (Fig. 6) indicates the low-fire setting.
Because the cam rotates as the valve opens, scales are
marked on the dial so the low-fire setting can be observed
with the valve in any position. One scale is visible when the
actuator is closed, and the other is visible when it is open.
These scales are not independent; the same setting applies
to both. The low-fire setting is adjusted either before the
actuator is installed or after the entire system is operational.
Refer to form 70-8311 for valve flow (capacity) curves.
IMPORTANT:
When using the V4062 with a V5055/V5097C or E
Valve (with double seal), match low-fire minimum
position to burner and application. Too low a
position could result in loss of burner flame. This
low-fire position should also be checked at periodic
maintenance intervals.
For most effective use of the V4062/V5055 or V4062/V5097,
be sure to select a valve body size closely corresponding to
burner capacity. An oversized valve might not allow the low-
fire rate to be adjusted to the desired minimum setting.
The V4062 Actuator is shipped from the factory with the low-
fire setting at MAX to provide a valve gas flow of
approximately 50 to 60 percent, which is adequate for safe
lightoff until the final setting can be determined.
M12798
C
7800 SERIES
RELAY
MODULE
NC
NO ADJUSTABLE
MAX
FLOW
LIMIT
SWITCH
FIELD WIRING
INTERNAL WIRING
TRAVEL
LIMIT
SWITCH
PUMP
MOTOR
PUMP
VALVE
1
L2
9
2
34
MAX
MAX
E
LOW-
FIRE
CAM
MIN
D
C
B
A
LO FIRE
SETSCREW
DUAL
LOW-FIRE
SETPOINT
INDICATORS
(SHOWN AT
MAX WITH
VALVE OPEN)
DIAL
M7340
Fig. 6. Low-fire position can be adjusted from 0.16 in. to
0.64 in. (with respect to V5055/V5097B) valve stem travel.