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9.4
M
AX
.
CAPACITY ADJUSTMENT
9.4.1
To reduce the max. capacity fit a 3 mm hexagon socket screw in the suitable
seat on the lower part of the valve body and rotate it counterclockwise
4
.
9.4.2
The MPV valves are supplied by the factory adjusted for the max. capacity.
10.
START-UP
10.1
Before starting the system up, carefully check the following points of the MPV
valve:
- correct installation according to the flow direction
- gas
outer
seals
- correct electric connections and grounding
- perfect electric and mechanical operation by opening and closing with closed
gas main cock.
Once preliminary conditions compliance, the gas main cock can be opened and
the operating test can be carried out.
11.
MAINTENANCE AND CHECKS
11.1
The MPV valve does not require any special maintenance.
Both the valve body and the actuator do not need any lubrication.
11.2
At least once a year, and above all for systems subject to vibrations, it is
recommended to check the harness for faulty contacts of the terminal board
and to tighten the screws.
12.
REPLACEMENT
For replacement of MPV valve, operate as follows:
12.1
Close the gas main cock.
12.2
Cut off the supply voltage to the valve.
12.3
Remove the actuator cover.
12.4
Disconnect all the electric connections, noting the cable numbers.
12.5
Remove the valve body from the piping.
12.6
Install the new valve according to the instructions of the previous chapters.
These instructions can be subject to possible variations without notice.
