26
6 COMMISSIONING
Fig. 6.1
When commissioning the boiler, ensure the Benchmark Checklist at the back of these instructions is
completed.
6.1
FILL THE SYSTEM
1. The boiler is fitted with an automatic air vent positioned on the pump (see Fig. 8.5), ensure that the vent is always open.
2. Open the central heating flow and return valves (vertical slot in-line with valve) (see Fig. 5.3).
3. Open the fill point valves on the filling loop until water is heard to flow.
4. To remove the air - Vent each radiator in turn, starting with the lowest in the system.
5. Vent air from the primary heat exchanger via the manual vent at the top left hand side (see Fig. 7.1).
6. Check the operation of the pressure relief valve (see Fig. 8.5) by turning the head anti-clockwise until it clicks. The click
is the valve lifting off its seat allowing water to escape from the system - check that this is actually happening.
7. Continue to fill the system until the pressure gauge indicates 1.0 bar. Close the fill point valve and check the system for
water soundness, rectifying where necessary. Disconnect the filling loop from the mains supply.
Water may be released from the system by manually opening the drain point (see Fig. 8.5) until the system design
pressure is obtained. The system design pressure (cold) should be between 0.75 and 1.25 bar.
Refer to Sections 3.8 and 3.9. Filling and Flushing the system.
8. Open the cold water mains inlet valve (see Fig. 5.3). Turn on all hot water taps and allow water to flow until no air is
present. Turn off taps.
9. Ensure that the flue gas heat recovery unit and condensate trap have been filled with water. Refer to Section 5.5,
paragraph 4.
6.2 BOILER CONTROLS - Fig. 6.1
6.3 TEST FOR GAS TIGHTNESS AND PURGE THE SUPPLY
1. With the boiler connected, pressure test the gas supply and inlet pipework
connected to the boiler for tightness in accordance with BS 6891.
2. Loosen the gas inlet pressure test point screw on the gas valve (see Fig. 6.2) and purge in accordance with BS 6891.
3. Retighten the test point screw and test for gas tightness. Close the boiler gas service cock.
Alpha InTec 40GS2 - Commissioning
1 On-Off/Standby button
2 Summer/Winter button
3 Reset button
4 Information button
5 Domestic hot water temperature
selector switch
6 Central heating water temperature
selector switch
7 Heating system pressure gauge
8 DHW mode active
9 Boiler locked does not require reset via
“RESET” button
10 Flame present symbol and relative
power scale
11 Operating in summer mode
12 Operating in winter mode
13 Central heating mode active
14 Temperature indicator, boiler info and
error codes
15 Boiler in Stand-by mode
16 Presence of external connected devices
17 Solar function active
18 Functioning with external temperature
probe active (optional)
19 Boiler connected to remote control
(optional)
20 FlowSmart option on
21 Optional boiler controls (if fitted)
bar
0
4
3
2
2.5
3.5
1.5
0.5
1
CORRECT PRESSURE
WHEN COLD
RESET
INFO
RESET
BOOST
bar
°C
x100rpm
1
2
3
4
5
6
7
21
RESET
BOOST
bar
°C
x100rpm
8
9
10
11
12
13
14
15
16
17
18
19
20
