Alpha Evoke 28NX and 33NX - Routine Servicing
7.1 IMPORTANT NOTES PRIOR TO SERVICING
1. Check the entire flue length and joints including the flue terminal outside. Ensure that all of the flue assembly has been
installed correctly and there are no blockages.
2. Run the boiler and check the operation of its controls.
3. Ensure that all system connections and fittings are sound. Remake any joints and check the tightness of any fittings that
may be leaking.
4. Refill, vent and re-pressurise the system as necessary. (Refer to Commissioning, Section 6.1).
If the system pressure exceeds 2.5 bar when operating at maximum temperature, the heating expansion vessel should
be checked and re-pressurised, if necessary.
Note: 1. Check the expansion vessel charge only when the system pressure is zero.
2. The expansion vessel pressure test point is accessible from on top at the top left side.
5. Check that the condensate trap drain pipe is connected and all joints are sound.
6. Record details of the service in the Service Record at the back of these instructions.
7.2 CASING REMOVAL - Figs. 7.1, 7.2, 7.3 and 7.4
To facilitate boiler servicing and maintenance the casing can be completely removed as follows:
Fig. 7.1
Case front panel - Fig. 7.1
1. Remove the two screws 'A'.
2. From the bottom pull the front panel 'B' slightly towards you.
3. Release the front panel 'B' from pins 'C' pulling it towards you
while pushing it upwards at the same time.
Combustion panel - Fig. 7.2
4. Remove the two screws 'D'.
5. Pull the combustion panel 'E' slightly towards you.
6. Release the combustion panel 'E' from the pins 'F' pulling it
towards you while pushing it upwards at the same time.
3
1
1
3
2
A
A
B
C
C
4
D
4
D
E
6
6
F
Fig. 7.2
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