Starting The Heat Pump - Viessmann VITOCAL 242-S Installation And Service Instructions Manual

Further details regarding the individual steps

Starting the heat pump

!
Please note
Operating the appliance with
insufficient refrigerant results in
appliance damage.
■ Before switching on the appli-
ance, the internal unit and the
refrigerant lines must be
charged with the indicated
amount of refrigerant. The
refrigerant circuit must be
checked for leaks: See chapter
"Charging the refrigerant lines
and internal unit" and "Check-
ing the refrigerant circuit for
leaks".
■ The fill valves on the external
unit must be open when the
appliance is switched on: See
chapter "Charging the refriger-
ant lines and internal unit".
Commissioning the system
Commissioning (configuration, parame-
ter settings and function check) can be
carried out with or without the commis-
sioning wizard (see following chapter
and service instructions for the heat
pump control unit).
Commissioning with the commissioning wizard
The commissioning wizard automatically
guides you through all the menus where
settings have to be made. For this, "Cod-
ing level 1" is automatically active.
Commissioning, inspection, maintenance
(cont.)
Follow the sequence shown
1. Switch ON external unit voltage.
2. Wait 2 min.
3. Switch ON internal unit voltage.
4. Start internal unit at the ON/OFF
switch.
Note
If the internal unit is switched on before
the external unit or the waiting time is
shorter than 2 min, the fault message
"0A Fault external unit" appears.
"Vitotronic 200" heat pump con-
trol unit service instructions
Note
The type and extent of the parameters
depend on the appliance type, on the
selected system scheme and the acces-
sories employed.
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