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11.0 Commissioning
© Baxi Heating UK Ltd 2008
11.1 Commissioning the Boiler
1. Reference should be made to BS 5449 Section 5 when
commissioning the boiler.
2. Open the mains water supply to the boiler.
IMPORTANT: The heat exchanger air vent on top of the
boiler (Fig. 62) MUST be opened before filling the
primary system.
3. Open all hot water taps to purge the DHW system.
4. Ensure that the filling loop is connected and open, then
open the heating flow and return valves on the boiler.
5. Open the screw on the automatic air vent on the pump
body (Fig. 63).
6. The system must be flushed in accordance with BS 7593
(see Section 6.2) and the flushing agent manufacturers
instructions.
7. Pressurise the system to 1.5 bar (Fig. 64) then close and
disconnect the filling loop.
8. Turn the gas supply on and purge according to in GB BS
6891 and in IE I.S. 813 “Domestic Gas Installations”.
9. Test for gas soundness.
10. Hinge the facia panel upwards and refit the case front
panel. Tighten the securing screws.
11. Turning either of the temperature control knobs will set
the relevant temperature. When the knob is turned the
display will alter and show the selected temperature. After a
few seconds the display reverts to show the current boiler
temperature (Fig. 65).
Pump
Automatic Air
Vent
Pressure Gauge
Screw
bar
0
1
2
3
4
Fig. 63
Selector Switch
Central Heating
Temperature Control
Domestic Hot Water
Temperature Control
Reset
1
2
3
4
5
PM
7
8
9
10
11
12
1
2
3
4
5
AM
7
8
9
1
0
11
12
0
bar
0
2
3
4
Pump
Fig. 65
Fig. 64
Display
Heat Exchanger
Automatic Air Vent
Fig. 62