VOKERA Linea Max HE Installation & Servicing Instructions Manual - page 29
Supplied By www.heating spares.co Tel. 0161 620 6677
LINEA MAX HE
25
4. Ensure central heating valves are open. See
6.3.2.2.
Observe pressure gauge reading (fig. 1, 28)
which should be approximately 1 bar when the
system is cold See 6.3.4
5. Turn off mains electricity and turn off gas ser-
vice tap on the appliance.
6. Gain general access as described in clause
8.4.
7. Remove main burner (see clause 8.8).
Lightly clean with a soft brush and inspect for
damage. If during initial inspection any combu-
stion irregularity was suspected, remove injectors
and clean or replace.
8. Place cloth below combustion chamber to
catch debris. Clean heat exchanger using suita-
ble brushes and rods if necessary.
9. Inspect combustion chamber lining. The insula-
ting material is easily damaged. Do not scrape,
but clean off lightly.
If any panels are damaged these should be repla-
ced (see clause 8.7).
10. Replace all parts in reverse order but leave
the controls fascia open and outer casing off.
11. Undertake a complete commissioning check
as detailed in section 6.
12. Close up control fascia and refix front casing.
13. Clean off casing using soft cloth and dilute
detergent.
14. Complete details of service undertaken in the
boiler log book.
15. Check the correct operation of the safety
valve (the safty valve is designed to open and
release excess pressure at 3 bar).
16. Check the expansion vessel charge. The
expansion vessel charge. The expansion vessel
is charged at 0.8 bar (see 8.20 for the correct pro-
cedure).
17. Ensure both flue venturis are clean and free
from any debris or obstruction.
18. Ensure the burner, main heat exchanger and
latent heat collector are clean and free from any
debris or obstruction.
NOTE:
there is a flue gas analysis test point incorporated
in the flue outlet. (see 8.25.6)
8.3.2
Replacement of Parts
1. The life of individual components varies and
they will need servicing as and when faults deve-
lop. The fault finding sequence charts in section 9
will serve to locate which component is the cause
of any malfunction. Instructions for removal,
inspection and replacement of the individual
parts are given in the following pages.
2. The domestic hot water heat exchanger may in
certain conditions become partially blocked by
scale deposits. Evidence of this will be deteriora-
tion in performance.
This condition could well be treated using pro-
prietary descalants following makers' instructions
without dismantling the appliance by circulating a
fluid through the dhw coil. To do this, disconnec-
tion from hot and cold services is necessary.
Reconnect only after thorough flushing with clean
water.
3. Occasional maintenance of mechanical
working parts will be necessary (three port valve,
flow diaphragm). Service kits are available from
your local Vokèra stockists. Vokèra Service Kit
No.T0019
8.4
To Gain General Access/Assembly
To remove components access to the interior is
essential.
Ensure electricity supply is isolated before
carrying out any servicing.
8.4.1
To remove front casing.
Push to release front door panel and lower to
reveal controls. Found magnetised on the inside
of the door panel will be a small tool.
Using the tool loosen the 2 captive screws secu-
ring the front control panel door to the appliance,
lift away to reveal the inside of the appliance (fig.
24).
8.4.2
Reassembly is always carried out in reverse
order to dismantling, unless otherwise stated.
Electrical connections must be remade in accor-
dance with the wiring diagram (fig. 53).
8.4.3
Where gas control components are replaced,
check the burner pressures and adjust if neces-
sary (See 8.25).
Fig. 24