Kemper PROTECT RPZ Bedienungsanleitung Seite 25

EN
8
1. 1.
Close cut-off valves 1 and 2 (see Illustrati-
on 3).
2. 2.
Reduce pressure by opening ball valves 3,
4, and 5 (see Illustration 3).
3.
3.
Take off cover.
4.
4. Remove the anti-pollution check-valve.
• For DN 65-150, first unscrew the
discharge anti-pollution check valve
and then the supply anti-pollution
check valve. You can obtain an assem-
bly tool as an accessory.
Warning! Danger of injury!
The anti-pollution check-valve is
spring preloaded.
5. 5. Check for leakproofness by filling water
from the rear.
• Leaky anti-pollution check-valves must
be replaced. Repair is not possible.
9
Troubleshooting
Errors
Drain valve opens
without any apparent
reason
Drain valve does not
close
Drain valve does not
open
25/ 28 – K410036100002-00 / 11.2020 – © www.kemper-olpe.de
Removal, installation and inspecting the anti-
pollution check valve
Possible causes
Strong pressure fluctuations in the
water network.
Fluctuating admission pressure
Supply-side anti-pollution check
valve or drain valve is soiled
Leaky supply anti-pollution check
valve
Deposits on the valve seat
Damaged O-rings
Leaky drain valve
Clogged pressure control line
6.
6. Assemble in the reverse sequence.
•
Grease O-ring and thread well on the
anti-pollution check valve with Unisili-
kon 250.
•
Do not damage the O-ring when
installing.
•
The tightening torque for the anti-
pollution check-valve is 100-120 Nm.
7.
7. Close the ball valves.
8. 8.
Open the cut-off valves.
9.
9. Vent the system through the ball valves.
10. Check the backflow preventer.
10.
12 Connect the dust plugs to the ball valves.
11.
Remedy
Install a water surge (hammer) damper
behind the backflow preventer
Install a pressure reducer before the
backflow preventer
Remove and clean anti-pollution
check valve
Remove the old clean anti-pollution
check valve, install the new one
Remove the drain valve
Remove drain valve and replace O-ring
Remove the drain valve
Remove and clean the pressure
control line