65
1.
Remove the protective magnesium anode.
Danger
The uncontrolled escape of DHW can cause
scalding and building damage.
Only open DHW and heating water connec-
tions with a depressurised DHW cylinder.
!
Please note
Negative pressure in the DHW cylinder can
cause material damage.
The air vent valve must always be open
when draining the DHW cylinder with a suc-
tion pump.
3.
To prevent contaminants entering the pipework,
separate the DHW cylinder from the pipework.
4.
Remove loose deposits with a pressure cleaner.
!
Please note
Pointed or sharp cleaning tools will damage
the cylinder interior.
Only use plastic tools to clean the inside.
5.
Use a chemical cleaning agent to remove hard
deposits that cannot be removed with a pressure
cleaner.
!
Please note
Cleaning agents containing hydrochloric acid
will attack the DHW cylinder material.
Only use pH-neutral cleaning agents.
Danger
Cleaning agent residues can result in poi-
soning.
Fully drain all cleaning agent.
Always observe the information provided by
the cleaning agent manufacturer.
6.
Flush the DHW cylinder thoroughly after cleaning.
7.
Fit the protective magnesium anode.
!
Please note
A short circuit between the protective mag-
nesium anode and the indirect coil negates
the protective effect of the magnesium
anode. This leads to corrosion damage on
the DHW cylinder.
Before connecting the cables, check the
resistance across terminals
A
and
B
. If the
resistance is significantly less than infinity,
check whether the protective magnesium
anode is touching the indirect coil.
Checking the indoor unit electrical connections for firm seating
Checking that the fan in the outdoor unit can run freely
Danger
Contact with the fans while they are operating
can result in serious cutting injuries.
■
Isolate the outdoor unit from the power supply.
Safeguard against unauthorised reconnection.
■
Do not open the appliance until the fan has
come to a stop.
Commissioning, inspection, maintenance
Cleaning the DHW cylinder
(cont.)
5831412
