6
10/2018
EN1377027BA
11
Operation
NOTICE
Thermal destruction of AC solenoids
Operating AC solenoids in unmounted
state will cause them to burn out.
→
Do not operate AC voltage solenoids
without being mounted above core tube
with core.
Actuate valve periodically
→
NOTICE
Actuate the valve at least
once a
month
to prevent functional parts getting
blocked.
12
Maintenance
Maintenance work must only be carried out by
qualified personnel (refer to section
1.8
).
info
Deposits of the medium, dirt par-
ticles, aged or worn out seals may lead
to malfunctions.
→
Individually determine as the operator ap-
plication specific maintenance intervals.
12.1
Cleaning and visual inspection
→
Periodically clean the valve and perform a
visual inspection at the same time.
1.
!
DANGER
Disconnect the solenoid from
power supply.
2.
!
CAUTION
Leave the solenoid to cool
down.
3. Clean the outside of the valve and check for:
•
tightness of cover screws
•
firmly sealing of cable gland,
•
Damages and leakages.
12.2
Checking for tightness and strength
NOTICE
Risk of damaging the valve
Invalid test conditions may lead to damage
of the valve.
→
Do not exceed the maximum operating
pressure during the test for internal tight-
ness (valve seat closed).
→
The test for strength and external leakage
(valve seat opened) according to EN12266
is permitted with maximum 1.5 times of
the nominal pressure rating (PN) at room
temperature.
→
The valve must not be operated during
these tests.
→
Ensure to increase the pressure slowly.
→
After each test, depressurize the valve
outlet first.
Test for internal tightness
1. Close the valve (solenoid of NC valves
de-energized; NO valves energized).
2. Flood the valve.
3. Gradually pressurize up to the maximum
operating pressure. There must no fluid
escape.
Test for strength and external leackage
1. Open the valve (solenoid of NC valves ener-
gized; NO valves de-energized).
2. Flood the valve.
3. Gradually pressurize maximum up to 1.5
times of the nominal pressure rating (PN) at
room temperature.
4. Apply soap sud to the outer sealing edges
and check for the formation of bubbles.
There must no bubbles appear.
1
1
Check sealing edges
12.3
Preparing maintenance
1.
!
DANGER
Disconnect the solenoid from
power supply.
2.
!
WARNING
Depressurize the pipe system.
3.
!
CAUTION
Leave the solenoid to cool
down.
Component overview
3
4
1
5
2
External components
7
6
9
11
10
12
8
Internal components
1
Solenoid with device socket
2
Fixing clamp
3
Valve cover
4
Valve body
5
Fixing screws
6
Diaphragm*
7
Compression spring*
8
Compression spring inside core*
9
Core*
10
Core tube
11
O-ring
12
O-ring
12.4
Dismantling valve
Unmount solenoid
→
Slightly bend back spring clip
2
and pull
Click-on
®
solenoid
1
upwards.
1
2
Unmount solenoid 9101
Dismantle core tube
Tool: wrench size 27 for 1502
1. Loosen the core tube at its
screw piece
2
.
2. Take off core tube together
with spring clip. Take care
for the loose core
9
and the
compression spring
8
.
Dismantle valve cover
1. Loosen fixing screws
5
(Torx M4) at the
valve cover
4
.
5
Loosen fixing screws
2. Take off valve cover
4
.
3. Take off compression spring
7
and
diaphragm
6
from valve seat.
2
