Installation instructions E-SHR series page 22
13 Maintenance
Maintenance or changes to the unit may only
be carried out by an authorised technician.
13.1 The frequency of maintenance
We advise to carry out an inspection to the boiler every
two years and an overhaul every four years. When doing
this the circumstances of the boiler’s location must be
taken into account, From this one can determine whether
to deviate from this advice.
13.2 Maintenance activities
If it is necessary to clean the boiler the following actions
to the following components must be carried out:
The air unit (casing of the boiler)
Dirt which is sucked in by the air supply pipe will end up
at the bottom of the casing. This dirt can be cleaned with
a cloth with a simple (non-abrasive) cleaning agent.
The burner ceramic bricks and heat exchanger
These components should only be cleaned if it is
determined that the maximum Pa is no longer obtained as
described in chapter 12.1.
The fan unit must be removed in order to be
able to inspect the heat exchanger.
In this case the following actions must be carried out:
- close the gas valve and isolate the boilers electrical
supply;
- loosen the nut of the gas pipe under the gas block;
- loosen the small crosshead screw on the red
electrical connection adaptor of the gas block;
- remove the electrical connection plug from the fan
motor;
- loosen the front crosshead screw of the black plastic
air inlet damper;
- after this turn the two clamping rods ¼ turn and remove
them by pulling them forward;
- slightly lift the fan unit and remove it towards the front
of the heat exchanger;
- the fan unit and the air inlet damper can be checked
for contamination and if necessary cleaned;
- now remove the burner ceramic bricks by slightly
lifting them upward and removing them in the same
direction as the heat exchanger fan unit;
- the burner ceramic bricks and the heat exchanger can
be cleaned by means of a soft brush;
Do not flush the heatexchanger through with
water
Refitting of the components is done in reverse.
12.2 Checking the CO
2
The CO
2
percentage is factory-set. This has to
be checked during check up, service and
error intervalls.
- remove the black cover from the gas valve by means
of unscrewing the by paint sealed screw.
- put the boiler into operation by means of the service
chapter as described in chapter 10.3;
- place the lance of the CO
2
gauge in the location
according to figure 14;
adjustment screw CO
2
figure 15
measuring point for CO
2
figure 14
- adjust to maximum load by means of the “+” key;
- ending the manual selection is done by pressing the
“-” key until the minimum load is shown. After pressing
this key again the text
is shown which means
that the selection is off.
- adjust the CO
2
percentage according to table 12. The
CO
2
percentage can be adjusted by means of the
adjustment screw according to figure 15.
- replace the black cover and tihgten it with the screw.
