9.0
COMMISSIONING
28
9.1
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.
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 (Fig. 30).
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 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. 32).
Automatic
Air Vent
Pressure
Gauge
Screw
2
1
0
4
3
bar
Fig. 30
Selector Switch
Central Heating
Temperature Control
Domestic Hot Water
Temperature Control
2
1
0
4
3
bar
Reset
1
2
3
4
5
PM
7
8
9
10
11
12
1
2
3
4
5
A
M
7
8
9
10
11
12
GRASSLIN
0
Pump
Fig. 32
Fig. 31
Display
Publication No. 5116282