Baxi Duo-tec Combi GA Owner's Manual
4.0 Repressuring System & ‘Service Due’
7
© Baxi Heating UK Ltd 2012
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4.1
Central Heating System Pressure
1. The normal operating water pressure is between 1
and 2.5 bar (Fig. 1). If the pressure exceeds 3 bar the
safety pressure valve will operate and a fault is indicated
(E117 displayed). Contact your installer.
and 2.5 bar (Fig. 1). If the pressure exceeds 3 bar the
safety pressure valve will operate and a fault is indicated
(E117 displayed). Contact your installer.
2. It may be necessary to repressurise the system
occasionally (as Fig. 2 or E118 displayed). A filling device
(the filling loop) will be fitted on the system. This will be
on the boiler itself, or on pipework near to the boiler.
occasionally (as Fig. 2 or E118 displayed). A filling device
(the filling loop) will be fitted on the system. This will be
on the boiler itself, or on pipework near to the boiler.
3. If you are unsure of its position, or cannot identify it,
consult the installer who fitted the boiler.
consult the installer who fitted the boiler.
4. The filling loop consists of two taps and a separate
copper pipe with connection fittings.
copper pipe with connection fittings.
5. Only when repressurising should the copper pipe be
connected between the two taps. Ensure that the nuts
on the pipe ends are tightened onto the taps.
connected between the two taps. Ensure that the nuts
on the pipe ends are tightened onto the taps.
6. Fully open one of the taps first, and then while
watching the pressure gauge, carefully open the second
tap.
watching the pressure gauge, carefully open the second
tap.
7. The system pressure is shown at all times on the
gauge under the boiler and can be viewed on the display
when there is power to the boiler.
gauge under the boiler and can be viewed on the display
when there is power to the boiler.
8. To display the water pressure press 6 times. ‘05’
will alternate with the system pressure. (NOTE: When
the pump is running the gauge under the boiler may
show a slightly differnt reading to the display)
will alternate with the system pressure. (NOTE: When
the pump is running the gauge under the boiler may
show a slightly differnt reading to the display)
9. When the needle on the gauge or figures on the
display indicate 1 or more turn both taps off.
display indicate 1 or more turn both taps off.
10. Disconnect the copper pipe from the taps (a small
amount of water may be present) and remove it. Keep
the pipe in a safe place for future use.
amount of water may be present) and remove it. Keep
the pipe in a safe place for future use.
4.2
‘Service Due’ Message
1. After 11 months operation the ‘Service Due’ message will
be shown on the boiler display.
be shown on the boiler display.
2. Please contact your Installer, Annual Service Provider or
‘heateam’ - The Service Division of Baxi to arrange your
Annual Service. You can contact ‘heateam’ on telephone
number 08448 711 545 or visit www.heateam.co.uk
‘heateam’ - The Service Division of Baxi to arrange your
Annual Service. You can contact ‘heateam’ on telephone
number 08448 711 545 or visit www.heateam.co.uk
Fig. 1
Fig. 2
Normal Pressure
Requires
Repressurising
Pressure Gauge
Front and Side Panel
removed for clarity
View Under
Appliance
R
‘Service Due’
Message
‘Sd’ will show for
three seconds,
alternating with the
boiler temperature.
boiler temperature.