baltur BGN 17 DSPGN, Инструкция по эксплуатации

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35
EN
FASTENING THE BURNER TO THE BOILER
The burner must be applied to the boiler’s iron plate, where the stud bolts given as standard accessories have
already been fitted in accordance with the plate drilling.
It is advisable to electrically weld the stud bolts to the internal part of the plate to avoid extracting them together with
the unit’s locking nuts, should the burner be disassembled.
To fit the asbestos flange between the burner and the boiler plate, remove the end section of the combustion head.
The relative nuts and washers required for connecting the burner to the boiler have been supplied as standard
accessories.
The unit is equipped with a cylindrical combustion head; it is advisable to fasten the boiler’s iron plate first and then
the burner. When the boiler door is not fitted with heat insulation, it is necessary to insert an asbestos protection at
least 10 mm thick between the plate and the boiler. The boiler plate should be according to our drawing and have a
minimum thickness of 10 mm in order to avoid possible deformation.
Before fastening the burner to the boiler, put the sliding flange in the position considered necessary to allow the
burner head to penetrate the combustion chamber as far as required by the boiler manufacturer. When this
operation has been completed, connect the burner to the gas pipeline according to the instructions contained in the
following pages and in function with the type of gas available (low pressure or medium pressure).
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
and BT 1387). 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 and 0002910640).
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 onto 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.