34
REMKO GPM
7) Inspection of the ionisation
current
Carry out the inspection with a
tester that is capable of detecting
microampere values with DC.
- Interrupt power supply to the
unit.
- Disconnect cable from the flame
monitoring unit and connect to
the minus terminal of the tester.
- Connect a cable from the positive
terminal of the tester to the
flame monitoring unit.
- Switch on the unit again and
measure the ionisation current.
The value of the ionisation current
must exceed 2 microamperes.
Lower values are a sign of poor
positioning or oxidised electrodes.
- Remove the fastening screws of
the cladding [A] of the flue gas
collector bin.
- Clean the interior of the pipe
along the entire length with a
suitable pipe brush, whereby the
dirt should be advanced to the
collector bin as far as possible,
where it can then be suctioned
out.
- After completion of cleaning,
reinstall the cladding [A] of the
flue gas collector bin and check
for tightness.
- After the work is completed,
switch on the unit again and
conduct a test run.
Monitoring electrode
Flame
monitoring unit
Micro-
amperemeter
A
Regular care and maintenance,
at the latest after every
heating period, is the basic
requirement for a long service
life and fault-free operation of
the equipment.
NOTE
Adjustment and maintenance
work may only be conducted
by authorised service
technicians.
NOTE
Thanks to the fault-free
combustion of the unit, only
minimal deposits normally
accumulate. However, deposits
may accumulate in the pipes of the
heat exchanger over the course of
time. Therefore, adherence to the
normal maintenance intervals is
mandatory.
A symptom of deposits in the heat
exchanger may be the noticeable
reduction of heat output.
To clean the heat exchanger, carry
out the following steps:
- Allow the unit to cool down
and disconnect from the mains
supply.
- Open the side door of the unit.
8) Inspection and cleaning of the heat exchanger
