INSTALLATION
Specification
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| KV 30 | KV 307 | KV 40
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9.2 Non-return valve
9.2.1 Checking the non-return valve
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Check the non-return valve annually.
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Draw off hot water until the heater of the DHW cylinder
switches on.
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1
2
1
1 Shut-off valve
2 Pressure gauge screw
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Remove the cap from the shut-off valve.
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Turn the shut-off valve clockwise to shut off the cold water
inlet.
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Remove the pressure gauge screw.
No water must drip from the shut-off valve.
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If water drips out, the non-return valve is not leaktight. Re-
place the safety assembly.
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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.
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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
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Open the water supply pipe (floor shut-off valve, for
example).
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Remove the cap from the shut-off valve.
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Turn the shut-off valve clockwise to shut off the cold water
inlet.
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Remove the pressure gauge screw and replace it with a pres-
sure gauge.
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Open the shut-off valve and check the pressure.
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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.
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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
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Close the water supply pipe (e.g. floor shut-off valve) to shut
off the cold water supply.
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Open the tap to drain the DHW cylinder.
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1 Top part, valve
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Pull the cap off the pressure reducing valve.
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Unscrew the top part of the valve.
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Remove the washer and spring.
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Raise the working part with a screwdriver. Remove the work-
ing part of the pressure reducing valve from the casing.
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Clean the working part with clear, cold water.
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Reinsert the working part. The selected output pressure re-
mains unchanged.
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Install the top part of the valve.
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Replace the pressure reducing valve if this does not fix the
problem.
10. Specification
10.1 Dimensions
KV 30
100
G ½
G ½
G
½ A
G 1A
100
127
6
51
100 ±5
14x1
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1
