baltur BGN 250 P, Инструкция по использованию

Страница: 18 / 60

18 / 20
0006081525_201112
ENGLISH
SPECIFICATIONS FOR PROPANE USE
1) Approximate assessment of operating cost
a) 1 m
3
of liquid gas in gaseous form has less heating power, about
22,000 kcal.
b) To obtain 1 m
3
of gas we need about 2 Kg or about 4 litres of
liquid gas.
This reveals that use of liquid gas (L.P.G.) yields approximately the
following equivalence: 22,000 Kcal = 1 m3 (in gaseous state) = 2
Kg of L.P.G. (liquid) = 4 litres L.P.G. (liquid). From this, operating
costs can be calculated.
2) Safety regulations
Liquid propane gas (L.P.G.) in the gaseous state has a greater
specific weight than air (specific weight relative to air = 1.56 for
propane), which means it does not disperse in air like methane
gas, which has a lower specific weight than air (specific weight of
methane relative to air = 0.60), but precipitates and spreads out at
ground level (as if it were a liquid). The Italian Ministry of the Interior
has set limits on the use of liquid propane gas in memorandum no.
412/4183 dated February 6
th
1975, of which we sum up the most
relevant concepts below.
a) Liquid propane gas (L.P.G.) burners and/or boilers may be used
only in premises located above ground level and certified toward
free spaces. Installations using liquid propane gas may not be
installed in underground or semi-underground premises.
b) Premises where liquid propane gas is used must have ventilation
openings which cannot be closed on their outside walls with a
surface area measuring at least 1/15 the surface area of the
room, with a minimum of 0.5 m
2
. At least one third of the entire
area of these inlets must be located in the lower part of the
external wall, flush with the floor.
3) Construction of the liquid propane gas installation for
ensuring correct operation and safety.
Natural gasification, from a cylinder bank or tank, can be used only
for systems having low power.
Gas supply capacity on the basis of tank size and minimum outdoor
temperature are shown in the table below, as an approximate
indication only.
4) Burner
The burner must be ordered specifically for use with liquid gas
(L.P.G.) so that it is equipped with gas valves of sufficient dimensions
to ensure correct ignition and gradual adjustment.
The valve size is foreseen for a supply pressure of about 300 mm
W.C. We suggest to check gas pressure at the burner by using
a water column pressure gauge.
!
Maximum and minimum burner power (Kcal/h) is, of
course, the same as for the original methane burner.
L.P.G. has greater heating capacity than methane gas,
which means that to burn completely, it requires a quan-
tity of air proportionate to the heating power produced.
5) Controlling combustion
To limit consumption and avoid serious trouble, adjust the combus-
tion by using appropriate tools.
It is absolutely essential to check that the percentage of carbon
monoxide (CO) does not exceed the maximum permitted value of
0,1 % (use a phial analyser).
!
The warranty does not cover burners burning liquid
propane gas (L.P.G.) in installations in which these
prescriptions have not been applied .
Minimum
temperature
- 15 °C - 10 °C - 5 °C - 0 °C + 5 °C
990 l tank 1.6 Kg/h 2.5 Kg/h 3.5 Kg/h 8 Kg/h 10 Kg/h
3000 l tank 2.5 Kg/h 4.5 Kg/h 6.5 Kg/h 9 Kg/h 12 Kg/h
5000 l tank 4 Kg/h 6.5 Kg/h 11.5 Kg/h 16 Kg/h 21 Kg/h