baltur BGN 100 DSPGN, Instructions Manual

Page: 9 / 48

9
GAS FEED SYSTEM AT LOW PRESSURE ( max. 400 mm.C.A )
When the burner has been correctly fastened to the boiler, proceed with connecting it to the gas pipeline (see BT 8780).
The dimension of the gas adduction pipeline should be in proportion to its length and to gas delivery and the load loss
should not exceed 5 mm W. C. (see diagram). It must also be perfectly hermetic and adequately tested before the
burner’s general inspection. It is indispensable to install a proper fitting on the pipeline, in proximity to the burner, to allow
for easy disassembling of the burner and/or opening of the boiler door.
In addition, the following should be installed: a cut -off cock,
a gas filter, a stabilizer or a pressure regulator (when the
feed pressure is superior to 400 mm W. C. = 0,04 Kg/cm
2
),
and an antivibration joint. These parts should be installed as
described in our drawing (see BT 8780).
We consider it useful to give the following practical tips for
installing the essential accessories on the gas pipeline near
to the burner:
1) To avoid big drops in pressure on ignition, the length of
the pipeline between the point where the stabilizer or
reducer is fitted and the burner should be from 1,5 to 2 m.
This pipe must have a diameter equal or superior to that of
the burner attachment fitting.
2) The fitting must be applied on horizontal pipes.
This is to avoid any impurities falling into the pipes or
entering the stabilizer during cleaning.
3) To get the best performance out of the pressure stabilizer,
it is advisable to fit it onto horizontal pipes, after the filter.
In this way, the vertical movement of the entire mobile part
(shutter) of the stabilizer is rapid. (If the movement of the
mobile part were horizontal - with the stabilizer fitted into
vertical pipes - friction to the guide bush/es of the pin to
which the entire mobile part is fitted would delay movement).
4) We advise installing a bend directly onto the burner gas
ramp before applying the removable fitting.
This layout makes it possible to open the boiler door, if
there is one, after the pipe fitting itself has been opened.
The above information is clearly illustrated in drawing BT
8780.
GENERAL DIAGRAM FOR INSTALLATION OF
GATE-FILTER-STABILIZER-ANTIVIBRATION JOINT
OPENABLE PITTING
N° BT 8780