37
Pneumatic Installation
Special cover plate with an
inside connection from "A" to "R"
for a free valve seat
(featured in the color green)
(order no. 2333187)
Procedure:
→
Open the housing following the instructions in Chapter "8. Opening and Closing the Housing".
→
Unscrew the cover plate of an unused valve seat, ensure that the white non-return valve underneath does not
fall out.
→
Fasten the cover plate with connection A-R instead of the previous cover plate (max. torque: 1 Nm).
→
Close the housing again - see also chapter "8. Opening and Closing the Housing".
→
Replace the dummy plug on the corresponding working connection 2/AX with a suitable air connection and
connect it to the process valve actuator.
Recommendation!
Because
moist air can still be drawn through the silencer
into the exhaust air connection (3/R) of the
control head during external cleaning and thus could enter the control head via the non-return valve, it is
recommended not to screw the silencer directly into the 3/R connection, but to connect and fix it e. g. to
an
interposed angular quick fitting gland
and a piece of hose (with the opening downwards).
9.3.
Flow restriction function of the solenoid valves
Set the flow restriction screws of the solenoid valves only when needed and after completion of all nec-
essary installations!
The flow restriction screws of the solenoid valves (see "Fig. 13: Flow restriction screws of the solenoid valves")
are used for setting the air intake and exhaust for the working connections:
• Factory setting: QNn approx. 110 l/min.
• The flow restriction screws do not serve any sealing function.
• Only tighten the flow restriction screws to the stopper, otherwise damage to device may occur.
• Only use appropriate screwdrivers (b
≤
3 mm).
english