Opening The Heat Pump; Writing Reports; Checking The Refrigerant Circuit For Leaks - Viessmann VITOCAL 242-G Installation And Service Instructions Manual

Opening the heat pump

Danger
Contact with 'live' components can lead to seri-
ous injury from electric current.
■ Never touch the wiring chambers (for heat
pump control unit and power supply connec-
tions: See chapter "Overview of the heat pump
control unit electrical connections".
When working on the appliance, isolate the
■
system from the power supply, e.g. at a sepa-
rate MCB/fuse or a mains isolator. Check the
system is no longer 'live' and safeguard
against reconnection.
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.
Always remake all earth connections.
The appliance and pipework must be connected
to the equipotential bonding of the building.

Writing reports

Enter the readings taken during commissioning into
the reports from page 88 and the operator's log (if
available).

Checking the refrigerant circuit for leaks

Danger
The refrigerant is a non-poisonous gas that dis-
places air. Unregulated escape of refrigerant in
enclosed spaces can lead to breathing difficul-
ties and suffocation.
■ Ensure adequate ventilation in enclosed
spaces.
■ Always observe regulations and guidelines on
handling this type of refrigerant.
Danger
Direct contact with refrigerant can be harmful to
skin.
Wear safety goggles and protective gloves when
working on the refrigerant circuit.
!
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).
Commissioning, inspection, maintenance
!
Please note
Commissioning immediately after installation
can lead to appliance damage.
Wait at least 30 min between installing and
commissioning 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 11.
2. When work is complete, close the heat pump: see
page 37.
Commissioning the appliance
"Vitotronic 200" operating instructions
Check the floor area, valves and all visible solder joints
for traces of oil.
Note
Traces of oil indicate a leak in the refrigerant circuit.
Have your heat pump checked over by a refrigeration
engineer.
In the case of leaks, the heat pump compact appliance
must be checked by a refrigeration engineer.
39