SYSTEMP – Installation Operation Manual (IOM SYSTEMP rev.N)

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12.2.8 REPLACEMENT OF WATER VALVE ACTUATORS WITH RING NUT CONNECTION
To replace the actuators of the water valves, proceed as follows:
1) Set the main switch to "0".
2) Open the panels via the relevant safety locks.
3) Disconnect the electrical connections from the actuator.
4) Remove the actuator by means of the ring nut. Do not use equip-
ment.
5) Replace with an original spare.
6) Make the electrical connections of the actuator as per the wiring
diagram.
7) Close the panels and return the main switch to “I”.
12.2.9 REPLACEMENT OF MAIN COMPONENTS OF THE WATER CIRCUITS
To replace the components of the circuits (pumps, coils, valves, etc.) the following instructions must be observed, as well as
full compliance with safety obligations regarding use of the equipment:
1) Set the main switch to "0".
2) Open the panels via the relevant safety locks.
3) Close the shut-o valves placed on the water circuit upstream of the valve.
4) Manually open the valve, as specied in the previous chapters.
5) Open the vents placed next to the coil and the cock on the circuit and drain the water.
6) Remove the component from its seat.
7) Replace with an original spare.
8) Open the water circuit paying close attention to vent the air.
9) Check for any leaks.
10) Restore the regulation valve
11) Close the panels and return the main switch to “I”.