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INSTALLATIoN
Initial start-up
7.
Initial start-up
f Check the safety valve (see chapter "Maintenance").
f Check the non-return valve (see chapter "Maintenance").
f KV 40: Check the pressure reducing valve (see chapter
"Maintenance").
Adjusting the flow rate
f Set the flow rate at the shut-off valve of the safety assembly.
KV 40: Adjusting the pressure reducing valve
The pressure reducing valve is set to 0.4 MPa at the factory (for
setting range, see chapter "Specification / Data table").
1 Quadrant
f Remove the cap in order to adjust the pressure reducing
valve.
f Turn the quadrant anti-clockwise to reduce the pressure or
clockwise to increase it.
8.
Troubleshooting
Problem
Cause
During heating, no water
The non-return valve is
drips from the safety
faulty.
valve.
After heat-up has ended,
The safety valve is con-
water drips from the
taminated.
safety valve.
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9.
9.1
9.1.1 Checking the safety valve
f For safety reasons, check the safety valve twice a year.
f Remove the cap. Turn the bleed cap 2 to 3 times anti-clock-
f Draw off hot water until the heater of the DHW cylinder
During the heat-up process, expansion water will drip from the
1
safety valve into the tundish.
f Check the function of the non-return valve if no water drips
No water must drip out after heat-up has been completed.
f Should water nevertheless drip after heat-up, clean the safe-
f KV 30 | KV 307: If necessary, install a pressure reducing valve.
9.1.2 Removing / cleaning the safety valve
f Isolate the DHW cylinder from the power supply.
f Remove the cap from the shut-off valve. Turn the shut-off
f Drain the DHW cylinder.
f Undo the safety valve.
f Clean the seat and gasket of the safety valve.
f Refit the safety valve.
Remedy
f Check the safety valve.
Check the function of the
non-return valve. If nec-
essary, replace the safety
assembly.
Clean or replace the safe-
ty valve.
Maintenance
Safety valve
Note
The safety valve cannot be repaired.
f In the case of faulty operation, replace the complete
safety valve.
wise. Water should then drain into the tundish.
switches on.
during heat-up.
ty valve and check the water inlet pressure.
KV 40: Check the function of the pressure reducing valve. If
necessary, clean or replace the pressure reducing valve.
valve clockwise to shut off the cold water inlet.
KV 30 | KV 307 | KV 40 |
13
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