Vaillant aquaPlus - To Turn off Central Heating and Hot Water for Short Periods of Time; Care and Maintenance; Frost Protection; Troubleshooting

11
Operation 3
Instructions for use VUI 362-7 11
3.7.2 To turn OFF central heating and hot water for
short periods of time
• Turn the main ON/OFF control (2) to the "0" position.
Note!
If you want to turn the aquaPLUS boiler OFF for
a longer period of time (e.g. holidays), and there
is no danger of frost, then you should also turn
off the gas supply, the cold water service valve
and the electrical supply. Please note the frost
protection hints in this regard.
Fig. 3.14: Shutting down the unit completely
3.8 Care and maintenance
Clean the outer casing of your boiler with a damp cloth
and a little soap. Do not use abrasive or solvent
cleaning agents that may damage the case or the plastic
fittings.
The appliance should be serviced at least once per year.
To ensure regular servicing, it is strongly recommended
that arrangements are made with your service agent or
Vaillant Ltd. For further details please contact Vaillant
Service Solutions: (0870 6060777).
3.9 Frost protection
Your boiler is equipped with a frost protection function:
If the heating water temperature drops below 5 °C when
the main switch is ON, then the boiler goes into
operation and heats the boiler circuit to approx. 30 °C.
Warning!
It cannot be guaranteed that water will circulate
throughout the entire heating system.
VRC-VC
C
o
0
I
C
o
C
o
C
o
I
0
2
If the boiler is not operated for several hours during
very cold weather there is therefore the possibility of
the system freezing. Please ensure that if you are
absent during a period of frost the central heating
remains in operation and all rooms are kept above
freezing point.
It must be remembered, however, that the boiler will be
automatically switched off by the built in monitoring
devices if certain faults occur, e.g. interruption in the gas
or electricity supply or faults in the flue gas system. To
overcome this possibility you can drain both the central
heating system and boiler.
Warning!
Frost protection and monitoring devices can
only function when the main switch of the unit
is set to the "I" position and the boiler is
connected to the electrical supply.
3.10 Troubleshooting
In the unlikely event that a problem occurs with the
operation of the aquaPLUS boiler, the following points
should be checked:
Boiler fails to operate:
• Is the gas supply turned on?
• Is the water supply turned on?
• Is there enough water in the heating system?
• Is the electrical supply switched on?
• Is the main ON/OFF control in the "On" position?
(switch position "I")
• Dry-running protection activated?
• Is the burner lock out indicator illuminated?
Hot water operates but no central heating
• Is the heating turned on?
• Are all external heating controls ON?
Warning!
If your boiler still does not operate then please
consult your installer or Vaillant Service
Solutions (0870 6060 777).
834641_12GB_032005.qxd 09.03.2005 16:42 Uhr Seite 11
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