Repressurising System & 'Service Due - Baxi 124 User Manual

Front and Side Panel
removed for clarity
Fig. 1
Fig. 2
'Service Due'
Message
'Sd' will show for
three seconds,
alternating with the
boiler temperature.
Fig. 3
© Baxi Heating UK Ltd 2016
Pressure Gauge
View Under
Appliance
2
1
0
bar
Normal Pressure
2
1
0
bar
Requires
Repressurising
R
4.0 Repressurising System & 'Service Due'
4.1 Central Heating System Pressure
1. The water pressure in the central heating system is indicated
by the pressure gauge and also can be viewed on the display
when there is power to the boiler.
2. To display the water pressure press
alternate with the system pressure. (NOTE: When the pump is
running the gauge under the boiler may show a slightly different
reading to the display) .
3. With the system cold and the boiler not operating the
pressure should be at least 0.5 bar. During operation the
pressure should not exceed 2.5 bar, and will normally be
between 1.0 and 1.5 (Fig. 1).
4. A pressure of 3 or greater indicates a fault (E117 displayed).
The safety pressure relief valve will operate, at a pressure of 3
(Fig. 3). It is important that your Installer or Service Engineer is
contacted as soon as possible.
5. The minimum pressure for correct operation is 0.5. If the
pressure falls below 0.5, this may indicate a leak on the central
heating system (Fig. 2). Error Code E118 will be shown on the
display.
4.2 To Re-Pressurise the System
(Using Temporary Filling Loop)
3
1. It may be necessary to repressurise the system occasionally
(when the water pressure falls below 0.7 bar). A filling device
4
(filling loop) will be fitted on the system. This may be on the
boiler itself or on pipework near to the boiler. Seek advice from
your installer.
2. If the water pressure requires regular re-pressurising a fault or
leak is indicated (see section 4.1). Seek advice from your installer.
3. The filling loop will consist of two isolating taps and a separate
temporary filling pipe with connection fittings.
4. Fit the temporary filling pipe, and tighten the two nuts on the
3
pipe to the taps.
5. Fully open one of the taps first, and then while watching the
4
pressure gauge, carefully open the second tap.
6. When the needle on the pressure gauge indicates between 1
and 2 bar, turn both taps off.
7. The temporary filling loop pipe must be disconnected and
completely removed after the system is pressurised. (Ensure the
two isolating taps are in the OFF position before disconnecting.)
Keep the pipe in a safe place.
4.3 'Service Due' Message (Fig. 3)
1. After 11 months operation the 'Service Due' message will be
shown on the boiler display.
2. Please contact your Installer, Annual Service Provider or Baxi
Customer Support on 0344 871 1545 to arrange your Annual
Service.
6 times. '05' will
7