54
3.
Connect tester (up to 5 mA) in series between tab
C
and earth cable
B
.
■
If the current measures
>
0.3 mA the anode is
OK.
■
If the current measures < 0.3 mA or if there is no
current at all, inspect the anode visually (see
page 55).
Draining the boiler on the DHW side
Fig. 46
1.
Connect the hose to the drain valve and route it into
a suitable container or drain outlet.
Note
Ensure adequate ventilation in the DHW pipework.
2.
Turn drain valve from lever position
A
to lever
position
B
or
C
as required.
■
Lever position
B
: To drain the heating system
but
not
the cylinder via the cold water connection.
■
Lever position
C
: To drain the heating system
and
the cylinder via the hot water connection.
Cold water connection remains filled.
Commissioning, inspection, maintenance
Testing the anode earth current with an anode…
(cont.)
5773 238 GB
