54
Observe engineering information.
Technical guides for heat pumps
Cleaning the DHW cylinder
Danger
Uncontrolled escape of DHW or heat transfer
medium can cause scalding and building dam-
age.
Only open DHW and heating water connections
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 vacuum pump.
!
Please note
Pointed or sharp-edged objects will damage the
DHW cylinder.
Use only suitable cleaning utensils to clean the
cylinder.
!
Please note
Cleaning agents containing hydrochloric acid
attack the DHW cylinder material.
Only use pH-neutral cleaning agents.
1.
8x
B
A
2.
Fig. 50
!
Please note
A short circuit between the magnesium anode
and the internal indirect coil negates the protec-
tive effect of the magnesium anode. This leads
to corrosion damage on the DHW cylinder.
Before connecting the electrical cables, check
the resistance across terminals
A
and
B
. If the
resistance is significantly less than infinity, check
whether the magnesium anode is touching the
internal indirect coil.
Commissioning, inspection, maintenance
Checking expansion vessel and heating circuit pressure
5700 582 GB
