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VPI Pressure Independent Control Valves & Actuators
Installation of Thermoelectric Actuators (MLP41TNA and MLP71TNA)
IMPORTANT: Do not connect power to the actuator unless the actuator is already fitted on the valve and NEVER
install the actuator in a closed position this may damage the valve.
IMPORTANT: The actuator is supplied in an open position to ensure the easy commissioning of the system.
Procedure to install the Actuator
The procedure to install the actuator is as follow:
1. Install the valve body.
2. The MLP41TNA and MLP71TNA (Thermoelectric) actuators are supplied with a separate black adaptor ring.
3. Mount the adaptor ring on top of the valve and finger tighten. Do not use additional tools.
The MLP71TNA comes with plug-in cable. Make sure that the cable is properly fitted next.
4. The actuator can now be fitted on the adaptor ring. A click noise will indicate that the actuator is correctly fitted as
shown below.
Mounting Position
The actuators can be mounted in any position (IP54 is dependent upon orientation; see Figure 15). Choose a mounting
position permitting easy access to cables and controls. To guarantee IP54, upside-down installation is only
recommended.
Procedure to remove the Actuator
1. Activate the release mechanism. Push the front button and removed the actuator from the adaptor ring.
2. Hereafter finger loosen the connection union. Do not use additional tools as it may damage the actuator.
IMPORTANT: Please make sure that the actuator is electrically opened, before re-fitting it on the valve.
31-00383-01
Figure 14. Installation of thermoelectric actuator on valve (example)
Figure 15. Actuator mounting for IP54
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