Hoval UltraGas 1550, Техническая информация Инструкции по установке

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INITIAl COMMISSIONING
5.7.1 Checking pressure in the burner cylinder
( safety check)
During the pre-aeration phase, the maximum pressure in
the burner cylinder is measured and compared with the
nominal measured value (see table below).
If the measured maximum pressure differs more than
10% from the nominal measured value, the settings of
the pressure switches B17 and B18 must be adjusted to
the conditions on site.
!
WARNING
The settings must only be changed by a spe-
cialist trained by Hoval or by Hoval customer
service.
1. Slightly loosen the screw at the top in the test port of
pressure switch B17.
B17
B18
2. Connect pressure measurement device to the test
port of pressure switch B17 and measure the maxi-
mum pressure during the pre-aeration phase.
3. Tighten screw in the test port.
4. Check whether the factory settings are suitable for
the local conditions:
Compare measured value with the nominal measu-
red value in the following table (the difference bet -
ween the measured value and the nominal measured
value must be no more than 10%).
UltraGas
®
Type
Nominal
Measured
value
Factory setting
Pressure switch
B17
Pressure switch
B18
(1550) 7.4 mbar 5.5 mbar 11 mbar
5. Disassemble pressure measurement device.
6. Tighten upper screw on pressure switch B17.
7. Correct pressure switch B17 or B18 settings if neces-
sary (if the measured value differs more than 10%
from the nominal measured value):
- Calculate setting value of the pressure switches
and compare with the setting position of the dials:
- Pressure switch B17 setting value:
Measured value x 0.6 (safety factor)
Example: 6.5 mbar x 0.6 = 3.9 mbar
- Pressure switch B18 setting value:
Measured value x 1.4 (safety factor)
Example: 6.5 mbar x 1.4 = 9.1 mbar
- Disassemble pressure switch covers.
- Set the pressure switch dials so that the outward-
facing arrow points to the calculated setting value.
- Fit pressure switch covers.
!
WARNING
Check pressure monitoring device for correct
fastening and leaks.