Trianco AZTEC 12, Инструкция по установке, эксплуатации и обслуживанию.

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16
SERVICING
To ensure reliable operation of your Aztec electric
combination boiler, it is recommended that you have your
boiler serviced once a year.
The person(s) who services or carries out any remedial
work, i.e. electrical fault finding must have suitable
engineering qualifications.
Isolate mains supply before carrying out any service
work.
Check all electrical connections on PCB and electric
elements to ensure they are secure and clean.
Check electrical insulation on wiring.
Ensure all air grilles are clean and free from obstructions.
Inspect seals around elements and the heat
exchanger’s top and bottom flanges.
PARTS REPLACEMENT
Casing Removal
Isolate electrical supply to the boiler.
Remove 2 top fixing screws securing front case in position.
Lift front panel upwards and away from boiler.
IMPORTANT: All electrical connections should be
checked. Loose connections can cause problems.
The boiler is fitted with two manual reset high limit
thermostats. Before replacing any part, ensure that
thermostat does not require resetting.
PCB ASSEMBLY REPLACEMENT
Note: The PCB is supplied with the element jumper fitted
suitable for 12kW boiler. When a 6kW or 9kW output
boiler is required, the element jumper must be
repositioned.
Ensure electrical supply to the boiler is isolated.
Remove the front casing and disconnect the temperature
button cables from the PCB.
Disconnect the pump and call plug, the thermistor
plug, the fan (where fitted) and high limit thermostat plug.
Disconnect all element cables.
N.B. Take note of wiring
arrangement before disconnecting.
With all elements disconnected, again taking note of
wiring arrangement, carefully disconnect and remove the
element cables from the PCB.
Important: Care must be
taken.
Disconnect the remaining red and black power cables from
the PCB.
Finally remove the 2 fixing screws holding the PCB
mounting bracket in position and remove the PCB from the
unit.
Re-fit in reverse order on reassembly always refer to wiring
diagram.
HIGH LIMIT THERMOSTAT REPLACEMENT
Ensure electrical supply is isolated to boiler
The high limit thermostat can be found fixed to top front
face of boiler.
Remove 2 terminal connectors from high limit thermostat,
loosen retaining straps and slide thermostat out from
behind.
Important when replacing thermostat ensure a heat sink
compound is used between back of thermostat and face of
boiler. (See Fig. 10 for positioning).
Inspect retaining straps and replace where necessary.
THERMISTOR REPLACEMENT
Isolate electrical supply to boiler.
The thermistor is located fixed to top front face of the
boiler above the high limit thermostat.
Disconnect from PCB board and slide out from behind
retaining strap.
Important when replacing thermistor ensure a heat-sink
compound is used between thermistor and boiler body
(see Fig. 10 for positioning).
Fig. 10