VOKERA Maxin 24e, Инструкция по установке и обслуживанию

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MAXIN 24e & 28e
SECTION 8 SERVICING INSTRUCTIONS
8.1 General
To ensure the continued safe and efficient
operation of the appliance, it is recom-
mended that it is checked and serviced as
necessary at regular intervals.
The frequency of servicing will depend upon
the particular installation conditions and
usage, but in general, once per year should
be adequate.
It is the law that any servicing work is carried
out by a competent person such as a
Vokera approved service agent, British Gas
or other CORGI registered personnel.
The following instructions apply to the boiler
and its controls, but it should be remem-
bered that the central heating and domestic
hot water systems will also require attention
from time to time.
8.2 Important Notes
WARNING: Having carried out preliminary
flame checks and before starting any servic-
ing work, switch OFF the mains electricity
supply and disconnect the plug at the main
isolating switch and socket. (If a switch is
used remove the fuse.)
Turn off gas supply at the gas service tap
fitted to the appliance.
Always test for gas soundness after any
service work and after exchanging any gas
carrying component.
8.3 Recommended Routine Servicing
8.3.1 Annual Servicing
When servicing is required the following
procedures should be carried out.
1. Inspect exterior for signs of damage and
deterioration particularly of flue pipework and
electrical connections.
2. Turn off mains electricity and remove
front casing (see clause 8.4.).
3. Replace fuse if previously removed (8.2.
above) and turn on electricity, run the boiler
for a few minutes in the domestic hot water
mode to permit inspection of its operation.
This is accomplished by opening a domestic
hot water draw off tap and inspect burner for
yellowing of flame tip, flame lift off or
sooting.
4. Ensure central heating valves (see fig.
6a) are open. Note these are 1/4 turn
valves which are open when the butterfly
top is in line with the valve, closed when
the butterfly top is across the valve.
Observe pressure gauge reading fig. 1, 19
which should be approximately 1 bar when
the system is cold (see 6.3.4)
5. Turn off mains electricity and turn off gas
service tap on the appliance.
6. Gain general access as described in 8.4.
7. Remove main burner (see 8.6).
Lightly clean with a soft brush and inspect for
damage. If during initial inspection any
combustion irregularity was suspected,
remove injectors and clean or replace
(see 8.7).
8. Place cloth below combustion chamber to
catch debris. Clean heat exchanger using
suitable brushes and rods if necessary.
9. Inspect combustion chamber lining. The
insulating material is easily damaged. Do not
scrape, but clean off lightly.
If any panels are damaged these should be
replaced (see 8.11).
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.
NOTE: There is a flue gas analysis test point
incorporated in the flue outlet. (see fig. 26)
8.3.2 Replacement of Parts
1. The life of individual components varies
and they will need servicing as and when
faults develop. The fault finding sequence
charts in section 9 will serve to locate which
component is the cause of any malfunction,
and 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 deterioration in performance.
This condition could well be treated using
proprietary descalants following makers
instructions without dismantling the appli-
ance by circulating a fluid through the dhw
coil. To do this, disconnection 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 Vokera stockists.
Vokèra Service Kit No.T0019.