Servicing; Parts Replacement - Trianco Aztec Gold Installation & Opersting Instructions

SERVICING

To ensure the continued safe and reliable operation of the
boiler, it is recommended that it is serviced at least once a
year
Please note that the person(s) who carries out any remedial
work, e.g. electrical fault-finding, should have suitable
engineering qualifications.
PROCEDURE
1) Isolate the mains supply to the boiler.
2) Check that all electrical connections to and from the PCB
and heat exchanger are secure and clean.
3) Check electrical insulation on wiring.
4) Ensure all air grilles are clean and free from any
obstruction.
5) Check water pressure and re-pressurise as necessary.

PARTS REPLACEMENT

IMPORTANT: Isolate mains electricity supply to the boiler
before carrying out any maintenance work. All electrical
connections should be checked as loose connections can
cause problems.
FRONT CASING REMOVAL
Remove the 2 x screws from the top of the boiler and the
single screw on the underside. The door can then be
removed safely.
PCB REPLACEMENT (Fig. 19)
1) Ensure the electrical supply to the boiler is isolated.
2) Remove the front casing as described above.
3) Unscrew the 2 x fixing screws holding the PCB mounting
bracket in position, allowing the unit to be pulled forward.
4) Holding the PCB assembly firmly in one hand,
disconnect the thermistor plug, pump and call plug on the
left hand side and the high limit thermostat plug on the
right hand side.
5) Taking care not to damage the PCB, pull the assembly
out a little further and disconnect the remaining mains
and element cables from the PCB.
6) Remove the 4 x fixing screws securing the PCB onto the
mounting bracket and replace with the new PCB unit.
7) Re-fit in reverse order, taking care to replace all cables
back into their original positions. Refer to wiring
diagrams on pages 6/7 for assistance.
FIG. 19 - PCB CONTROLLER
18