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INSTALLATIoN
Specification
9.2
Non-return valve
9.2.1 Checking the non-return valve
f Check the non-return valve annually.
f Draw off hot water until the heater of the DHW cylinder
switches on.
1 Shut-off valve
2 Pressure gauge screw
f Remove the cap from the shut-off valve.
f Turn the shut-off valve clockwise to shut off the cold water
inlet.
f Remove the pressure gauge screw.
No water must drip from the shut-off valve.
f If water drips out, the non-return valve is not leaktight. Re-
place the safety assembly.
f If cold water drips, turn the shut-off valve anti-clockwise
briefly to open it and flush out any dirt. Then close the shut-
off valve again. If water continues to escape, replace the
safety assembly.
9.3
Shut-off valve
The shut-off valve is maintenance-free.
f If the shut-off valve proves to be faulty, replace the safety
assembly.
9.4
KV 40: Pressure reducing valve
9.4.1 Checking the pressure reducing valve
f Open the water supply pipe (floor shut-off valve, for
example).
f Remove the cap from the shut-off valve.
f Turn the shut-off valve clockwise to shut off the cold water
inlet.
f Remove the pressure gauge screw and replace it with a pres-
sure gauge.
f Open the shut-off valve and check the pressure.
f If the pressure does not correspond to the maximum per-
missible pressure (see chapter "Specification / Data table"),
regulate the pressure by turning the quadrant at the pressure
reducing valve.
14
| KV 30 | KV 307 | KV 40
f Check by drawing off water briefly. If the pressure rises,
clean or replace the pressure reducing valve.
9.4.2 Removing / cleaning the pressure reducing valve
f Close the water supply pipe (e.g. floor shut-off valve) to shut
off the cold water supply.
f Open the tap to drain the DHW cylinder.
1
2
1 Top part, valve
f Pull the cap off the pressure reducing valve.
f Unscrew the top part of the valve.
f Remove the washer and spring.
f Raise the working part with a screwdriver. Remove the work-
ing part of the pressure reducing valve from the casing.
f Clean the working part with clear, cold water.
f Reinsert the working part. The selected output pressure re-
mains unchanged.
f Install the top part of the valve.
f Replace the pressure reducing valve if this does not fix the
problem.
10. Specification
10.1 Dimensions
KV 30
100
G ½
G ½
6
14x1
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1
100 ±5
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