baltur BGN 40 DSPGN-ME, Instruction Manual

Page: 25 / 72

25
ENGLISH
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.. 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.
8780GB.tif
GENERAL DIAGRAM FOR INSTALLATION OF
GATE-FILTER-STABILIZER-ANTIVIBRATION JOINT
OPENABLE PITTING