21
Regulation and servicing
fo
r the technician
I
NSTRUCTIONS
FOR
FIRST
IGNITION
,
REGULATION
AND
MAINTENANCE
ATTENTION: the operations described below
must be carried out only by qualified personnel
[authorized by HERMANN]
.
When regulation/measuring is over, remember
to tighten pressure tapping point screws and
check for gas leaks!
Access to the regulation
devices
1. Unscrew the screws [1] and let the catches slide [2]
in order to release the front casing [3];
2. Push the front casing [3] upwards and remove it;
3. Unscrew the screws [4] and overturn downwards the
control panel [5];
4. After the regulations, close the boiler repeating everything in the other sense, paying attention
to insert the flexible shaft of the DHW temperature knob in its clutch on manual mixing valve.
Hook the frontal casing to the heads of the four screws [6] (which must not be released) and
remember to stop it through the catches [2] and through the screws [1].
Opening of the sealed
chamber
In order to execute all the operations for the cleaning and
maintenance of the boiler it is necessary to put the closing of
the sealed chamber down, making the following actions:
— Release the screws [1]
— Release the screw with hexagonal head [2] (only model
30 SE)
— Pull out the closing of the sealed chamber.
When all the operations have been done, put the closing of
the sealed chamber up making the previous actions in the
opposite order.
ATTENTION: it is important to put up ALL the screws
for the fixing of the closing in order to ensure the seal
of the sealed chamber and avoid eventual vibrations
and noise.
3
774R01
6
6
5
6
6
4
1
2
4
1
1
2
7
8
0R
0
0
