GB-20
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Maintenance
CAUTION
To ensure that no damage occurs during operation
and maintenance, please observe the following
instructions. Otherwise, injuries or damage to the
device may occur and/or the function of the device
may be impaired. The supplier/manufacturer cannot
accept liability for damage resulting thereof.
– Have the heater cleaned at least once a year
by qualified maintenance personnel.
– Have the safety functions checked at least once
a year by qualified maintenance personnel, see
page 21 (Checking the safety functions and
burner operation).
– Check the chimney once a year with your local
chimney sweep to find whether the flue gas and
air supply routes are clear.
– Sharp-edged metal sheets. Always wear protec-
tive gloves.
– After cleaning or repair work, check that the
components on and in the heater are in good
condition. The device may only be restarted
if all safety devices have been installed and
the safety functions have been checked, see
page 21 (Checking the safety functions and
burner operation).
1
Switch off the burner control unit.
Visual inspection
2
Check all heaters for dirt and clean them accord-
ingly, see page 12 (Cleaning).
3
Check all heaters for damage and loose parts.
4
The rubber seals between the electrodes and
terminal boots may be displaced by the water
jet. Check whether the seals are fitted correctly.
5
Check the internal air hose
5
for damage.
5
6
Check the wiring.
7
Check the cable glands.
8
Depending on the number of operating cycles,
we recommend that the spark electrode and
flame rod be replaced once per year.
9
Check the seal on the housing cover of the burner
control unit. Replace it if necessary.
10
Check the inside of the housing cover for traces
of dust, dirt or moisture. If you find such traces,
the cause must be rectified at all times, e.g. by
sealing an open cable gland.
11
Check the cable harness and wiring for signs of
damage.
Number of operating cycles
2
Check the number of operating cycles (heater ON):
the number of operating cycles can be displayed
by pressing and holding the RESET button. The
number of operating cycles is composed as fol-
lows in alternating displays:
The first character (X.) stands for X,000,000 op-
erating cycles, the second character (Y) stands
for Y00,000 operating cycles. For example, the
first character is the number 2.: the unit has ex-
ceeded 2,000,000 operating cycles. The second
character is the number 3: the unit has exceeded
300,000 operating cycles. The total number of
operating cycles is composed of the numbers
2 and 3. This gives a total number of operating
cycles of 2,300,000.
3
Disconnect the system from the electrical power
supply.
▷
The heater may only be disconnected from the
electrical power supply once the device has been
switched off and post-cooling is complete.
4
Shut off the gas supply.
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