Manual Override; Troubleshooting - Distech Controls VA-056P Series Hardware Installation Manual

Manual Override

A 3 mm hex wrench can be used to move the actuator to any position
between 0 and 1.
A control signal from the controller takes priority in
determining the position.
To retain the manually set position, unplug the
connecting cable or switch off power and the control
signal.
Turn the wrench clockwise
(counterclockwise to retract). The actuator will maintain its position
until power is provided or restored.
VA-056PNX024P/VA-056PSX024P: If an override is
performed while the power supply is connected, the
actuator will not track accurately when the control signal
is applied. A short power off/power on sequence is
required to recalibrate the actuator.
(A) Turn hex wrench counterclockwise to retract the shaft.
(B) Turn hex wrench clockwise to extend the shaft.
Figure 15. Manual Override.
Removing an VA-056PNX024P/VA-056PNX024F Actuator from
a Valve
1. Loosen the terminal connector with a flat-blade screwdriver.
2. Remove the terminal connector and the terminal plug from the
actuator.
Figure 16. Removing Terminal Plug.
to extend the actuator
3. Remove the terminal plug from the connector and save.
4. Loosen the actuator coupling, turn counterclockwise.
5. Remove the actuator from the valve.
Removing an VA-056PSX024P/VA-056PSX024F Actuator from
a Valve
1. Remove the terminal cover (Figure 17) using a Phillips head
screwdriver.
2. Identify and disconnect wiring from the terminals.
3. Remove wiring retention screw.
4. Do one of the following:
shaft
a) Remove plenum cable adapter and plenum cable; or
b) Remove flex conduit.
5. Loosen the actuator coupling on the valve (Figure 8, reverse #2).
6. Remove the actuator from the valve.
Figure 17. VA-056PSX024P/VA-056PSX024F Actuator Components.

Troubleshooting

-
Check the wiring for the proper connections.
-
If actuator becomes inoperable, replace the unit.
Service Envelope
Minimum access space recommended:
1. 8 inches (200 mm) above the actuator.
2. 8 inches (200 mm) beside the terminal cover.
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