Operating The Boiler; Sealed Central Heating Systems Only; All Systems; User Controls - Vaillant ecoMAX pro Instructions For Use Installation And Servicing

3 Operating the boiler

3.1 Sealed Central Heating Systems only

CAUTION: A sealed water system must be filled and
pressurised by a competent person.
Only light the boiler when you are sure that the system
and boiler have been filled and pressurised.
The pressure should read at least 0.7 bar, when the
system is cold. If the needle displays a value below this,
follow the instructions left by your installer to refill the
system. Alternatively your installer should be called to
refill the system.

3.2 All Systems

Check that the electrical supply to the boiler is ON at the
external isolator.
Set any remote heating system controls as required.

3.3 User Controls

Slide the On / Off control down to the I position to turn on
the boiler. The operating indicator will illuminate (green)
to show that the boiler is on.
The temperature of the central heating water can be
adjusted by pushing the mode button (
radiator symbol is displayed. Pushing the + or - buttons
will then set the water temperature as desired. (Typical
setting temperatures for a normal radiator heating system
will be in the range of 60 °C to 80 °C. Note that set
temperatures below 60 °C will not sufficiently heat any
hot water cylinder). To return to the normal mode push
the mode button ( ) until the display shows the current
temperature of water in the boiler.
When the boiler is operating the flame symbol will be
shown in the display. The bar symbol is also shown and
this indicates the modulating output of the boiler. The
boiler will automatically modulate to the output needed
by the heating system - the more bars that are displayed,
the higher the output.
The ecoMAX pro is a fan flue appliance and the
operation of the fan may be heard when the boiler
is running and for a short period after the boiler has
stopped. Should a fault condition occur the operating
indicator will flash red and will be accompanied by
an "F" symbol in the display. To reset the boiler slide
the On / Off control to the Off (O) position and after 5
seconds back to the On (I) position. The boiler should
now operate. If the fault persists contact your installer /
service provider. The ecoMAX pro has a Holiday / frost
mode. If you are going on holiday and do not want the
boiler to be operated by the external heating controls
press the mode button (
flashes in the left hand edge of the display. Then press
the + or - button until the arrow indicator points to the
holiday symbol ( ). The boiler will now only operate if
necessary for frost protection of the boiler itself as well
as running a daily pump exercise programme to prevent
sticking. It will not be turned on and off by the external
heating controls. If a system frost protection thermostat
has been fitted this will remain active.
Instructions for Use, Installation and Servicing ecoMAX pro
) until the
) until the MODE indicator

3.4 To Turn the Boiler Off

Normally the boiler will be turned off by the heating
system controls. The mains On / Off control may be used
to switch off the boiler, however it is preferable to leave
the electrical supply on whenever possible to permit
operation of the built-in frost protection and daily pump
exercise programme.
Fig 3.1
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