OPERATING THE APPLIANCE
PRESSURE GAUGE:
The pressure gauge indicates the boiler/heating
system water pressure and has two pointers:
Red (external) pointer is set manually to indicate
the normal system pressure (1 to 1.5 bar for
sealed systems, 0 to 0.5 bar for open vent
systems).
Grey (internal) pointer shows the actual system
pressure (on sealed systems the pressure will
rise when the boiler/system heats up from cold).
Please check with your installer what type of
system you have.
On sealed systems the red pointer should be set
to the normal operating pressure (1 to 1.5 bar)
and the grey pointer will fluctuate around this
pressure depending on whether the system is
hot or cold. If a sealed system pressure drops
below 1 bar the system should be repressurised
to 1.5 bar and the cause of the drop
investigated. If the pressure rises to more than
2.5 bar please contact your installer for advice.
Regularly check that the pressure is maintained
and contact your installer or maintenance
engineer if a permanent significant drop in
pressure occurs.
On open vent systems the pressure gauge is not
used and the grey needle will remain at the
bottom of its scale. If the pressure rises to more
than 1 bar please turn off the appliance and
contact your installer for advice.
