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4.MAINTENANCE AND DRAINING
Maintenance should be carried out by persons
over 18 years of age, with sufficient understand-
ing. If in doubt, contact authorized installer.
4.1 Checking the manometer
Check manometer 2 times/year. It is particu-
larly important to check the manometer after
a new installation. The manometer showing
the pressure within the radiator system should
display between 0.5 – 1.2 bar. If needed, fill the
system with water until the manometer shows
1.0 bar. If you feel uncertain contact your in-
staller.
4.2 Checking the temperature & pressure re-
lief valve
Exercise the T&P relief valve once every year
by turning its wheel until water is streaming
out of the valve. The test is performed to safe-
guard the function of the valve.
The temperature variations within the system
make the water expand, which may lead to wa-
ter occationally dripping out of the overflow
pipe. This is normal and no action is necessary.
The overflow from the T&P safety valve must
NOT be blocked, sealed or plugged.
4.3 Checking the protective anode
(if installed) / PAW-TD23B6E5AN
1.
Shut the system down using the on/off but-
ton on the control panel. Switch control fuse
off.
2.
Turn off the cold water supply to the tank.
3.
De-pressurize the buffer tank to less than 0.5
bar.
4.
Open a domestic hot water tap to release
pressure from the tank. Leave open.
5.
Open the drain valve for the DHW tank. The
product will drain.
6.
Unscrew, pull out and clean the anode (A).
7.
Measure the diameter. If the diameter of the
anode is less than 10 mm it must be replaced.
8.
Refit the anode with torque 40Nm.
9.
Close the domestic hot water tap.
12
!
WARNING
10. Open incoming cold water supply to the tank.
11.
Re-pressurize the buffer tank to previous set-
ting.
12. Restart the system by turning the control fuse
on and push the on/off button on the unit
control panel.
control panel.
A
!
Replace the anode if the diameter is less than
10 mm. The anode protects the tank from ag-
gressive chemical substances in the water.
4.4 Draining the product
1.
Shut the system down using the on/off but-
ton on the control panel. Switch control fuse
off.
2.
Turn off the cold water supply to the tank.
3.
De-pressurize the buffer tank to less than 0.5
bar.
4.
Open a domestic hot water tap to release
pressure from the tank. Leave open.
5.
Open the drain valve for the DHW tank. The
product will drain.
To refill the product see pt. 3.5.3.
WARNING
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