Supplied By www.heating spares.co Tel. 0161 620 6677
21
Linea Plus AG
SECTION 8 SERVICING INSTRUCTIONS
8.1
General
To ensure the continued safe and efficient
operation of the appliance, it is recommended
that it is checked and serviced as necessary at
regular intervals.
The frequency of servicing will depend upon
the particular installation conditions and us-
age, 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 Vokèra
service engineer, approved service agent,
British Gas or other CORGI registered per-
sonnel.
The following instructions apply to the boiler
and its controls, but it should be remembered
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 serv-
ice work and after exchanging any gas carry-
ing component.
8.3
Recommended Routine Servicing
8.3.1
Annual Servicing
When servicing is required the following pro-
cedures 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 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 inspecting burner
for yellowing of flame tip, flame lift off or
sooting.
4. Ensure central heating valves are open.
See 6.3.2.1.
Observe pressure gauge reading (fig. 1, 31
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 dam-
age. If during initial inspection any combus-
tion irregularity was suspected, remove injec-
tors 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 cas-
ing 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 (fig. 1, 23).
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.
Instructions for removal, inspection and re-
placement 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' in-
structions without dismantling the appliance
by circulating a fluid through the dhw coil. To
do this, disconnection from hot and cold serv-
ices is necessary. Reconnect only after thor-
ough flushing with clean water.
3. Occasional maintenance of mechanical
working parts will be necessary (three port
valve, flow diaphragm). Service kits are avail-
able from your local Vokèra stockists. Vokèra
Service Kit No.T0019.
