Installation instructions E-SHR series page 21
12 Commissioning
Work on the boiler must be carried out by a
competent person, (Ref: Gas Safety
Installation and Use ) using correctly
calibrated instruments with current test
certification.
The casing is fixed by 4 quick release clamps and 5
screws (4x 1 clamp and 1 behind door). After removing the
screw, unlock the clamps, now the casing can be
removed.
With the E-SHR settings such as burner pressure and
adjustment of the air quantity are unnecessary, due to the
fact that the boiler operates with a so-called zero pressure
control. By this means the correct gas quantity is
controlled by the suction operation of the fan. The fine
adjustment which is carried out at the factory is once-
only, which means that adjusting of these values is
unnecessary.
Following maintenance or other activities;
always check the installation of all parts through
which gas flows (using leak-search spray).
12.1 Checking for contamination
In order to be able to check the boiler for
contamination in the following running years
it is advisable to measure the maximum air
displacement in the boiler when putting the
boiler into operation. This value can be diffe-
rent with each type of boiler.
In order to be able to measure this value the following
operations must be carried out:
- in order to enter the service chapter feed in the access
code as described on page 18-20;
- select the manual fan setting without burner action
Step
, by means of the Step key which will
indicate that the fan is off
;
- connect the digital pressure gauge hose to the
uppermost measuring nipple of the gas block
according to figure 13 (open it before fitting the hose);
- take the fan to its maximum number of revolutions by
means of the + key;
- measure the pressure difference and write down this
value;
- when next servicing the boiler the value of the fan
output may not have reduced by more that 20%
compared to the value during commissioning. If this
value is lower than 20% the boiler does not require
maintenance.
measuring point air pressure difference
figure 13
