Viadrus G 700, Manual

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The gas flow is specified at the gas temperature and 0 °C and 1013,25 mbar air pressure For a particular
temperature and pressure the real consumption is calculated as follows :
1013,25 . (273 + t)
V = V
E . ----------------------------------------
p . 273
V -
gas volume at a given pressure and temperature
V
E -
gas volume at 0°C and 1013,25 mbar
t - gas temperature (°C)
p - absolute gas pressure (mbar)
273 - absolute temperature (K)
3. Description
3.1.
Boiler construction
The boiler drum (see Fig. no. 1 – individual positions) consists of sections by means of forced on
insertions and secured by anchor bolts. The boiler has three-draught construction and the combustion chamber
and the convective part are created by sections; the boiler water space is inside. The boiler tightness is
guaranteed by the packing cord inserted in a groove on four sides of individual sections and the combustion
chamber plus the silicon sealant deposited in grooves at the point of sections joint after boiler drum constriction.
On the frontal section is there is mounted closing plate with insulation which can open either to the left
or to the right hand side. This must correspond with hinges and closures position. The flange for burner is a part
of closing plate. On the flange there is placed a sight glass with a probe for measuring the overpressure in
combustion chamber.
The opening
φ
126 mm in the upper part of the frontal section is closed by a flange with boring 3 x G 1/2“ for
the reservoir of thermostat, safety thermostat and thermometer and the reverse valve of manometer. In the
lower part of the frontal section there is an opening
φ
126 closed by a blank flange.
Input and output of heat carrier are situated on the rear section and is carried out by means of flanges with
a sleeve DN 100 and intermediate flanges DN 100. On the lower sleeve there is the discharge cock G 3/4“.
The restricting insertion belongs to the flange with the sleeve for heat carrier input. In the riser above the lower
flange with a sleeve there is positioned the outside protective clamp of boiler. In the upper and lower parts of
the rear section there are four small covers for cleaning.
Flue gases are carried away from boiler through the outlet neck positioned on the flue collector. Under the
outlet neck there is the explosive flap with a holder. On the outlet neck there are the measurement points for
temperature and flue gases analysis. .
The boiler drum is perfectly insulated by the mineral wool plates 100 mm thick. The steel shell of boiler
is suspended on two consoles of the shell positioned next to upper anchor bolts. The surface is treated by
comaxit paint. In the frontal part of boiler there is installed the electric panel in which there are installed the
switching, regulation and safety elements and the wiring block.