59
Danger
Contact with live components can lead to seri-
ous injury from electric current. Some compo-
nents on PCBs remain live even after the power
supply has been switched off.
■
Never touch
the wiring chambers (see chap-
ter "Overview of connections: indoor unit" and
"Overview of connections: outdoor unit").
■
When working on the appliances (indoor/
outdoor units), isolate the system from the
power supply, e.g. at the separate MCB/fuse
or a mains isolator. Check that it is no longer
live. Safeguard against unauthorised recon-
nection.
■
Prior to working on the appliance, wait at
least 4 min until the voltage has completely
dropped out.
Danger
The absence of system component earthing can
lead to serious injury from electrical current and
component damage in the event of an electrical
fault.
All earth connectors
must
be reconnected.
The appliance and pipework must be connected
to the equipotential bonding of the building.
!
Please note
Commissioning immediately after siting the
appliance can lead to appliance damage.
Wait
at least 30 min
between siting and com-
missioning the appliance.
!
Please note
Refrigerant can escape when working on the
refrigerant circuit.
Work on the refrigerant circuit must
only
be car-
ried out by a certified contractor (in accordance
with EC 842/2006 and 303/2008).
1.
Remove front panel: See page 30.
2.
When work is complete, close the heat pump: See
page 56.
For commissioning the appliance, see also the
"Vitotronic 200" operating instructions.
Compiling reports
Enter the readings taken during commissioning into
the reports on page 128 onwards and the operator's
log (if available).
Checking the refrigerant circuit for leaks
Check the connections for refrigerant leaks.
Danger
Direct contact with refrigerant can be harmful to
the skin.
Wear safety goggles and protective gloves when
working on the refrigerant circuit.
!
Please note
Refrigerant can escape when working on the
refrigerant circuit.
■
Always observe regulations and guidelines on
handling this type of refrigerant.
■
Work on the refrigerant circuit must
only
be
carried out by a certified contractor (in accord-
ance with EC 842/2006 and 303/2008).
Filling and venting on the secondary side
Unsuitable fill and top-up water increases the level of
deposits and corrosion. This can lead to system dam-
age.
Hard water can also cause damage to the instantane-
ous heating water heater in particular.
Observe VDI 2035 regarding quality and amount of
heating water, including fill and top-up water.
■
Flush the heating system thoroughly before filling.
■
Only fill with water of potable quality.
■
Only fill and operate appliances that have an instan-
taneous heating water heater with softened water.
Commissioning, inspection, maintenance
Opening the heat pump
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