Specifications For Propane Use; Controlling Combustion - baltur BTG 3,6 Notice D'instructions

SPECIFICATIONS FOR PROPANE USE

We wish to inform you of a number of considerations regarding the
use of liquid propane gas (L.P.G.).
• Operating costs approximate assessment
- 1 m of liquid gas in gaseous phase has a lower calorific power,
3
of about 22,000 kcal.
- To obtain 1 m of gas we need about 2 Kg or about 4 litres
3
of liquid gas.
• This reveals that the use of liquid gas (L.P.G.) yields
approximately the following equivalence: 22,000 kcal = 1 m
(in gaseous phase) = 2 kg of L.P.G. (liquid) = 4 l L.P.G. (liquid)
from which the operating cost can be assessed.
• L.P.G. has a greater calorific value than natural gas, which
means that to burn completely, L.P.G. requires higher quantities
of combustion air.
• Safety provisions
Liquefied petroleum gas (L.P.G.) in the gaseous phase 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 natural gas, which has a lower specific weight than
air (specific weight of natural gas relative to air = 0.60), but
precipitates and spreads out at ground level (as if it were a
liquid). In view of the above principle, the Italian Ministry of the
Interior has set limitations to the use of liquid gas in a specific
regulation. The most important concepts are listed below.
If the burner is installed abroad, comply with the regulations
currently in force in that country.
- Liquefied petroleum 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 gas are
not allowed in underground or semi-underground premises.
- Premises where liquid gas is used must have ventilation
openings which cannot be closed on their outside walls with
a surface area measuring at least 1/15 of the surface area of
the room, with a minimum of 0.5 m
- At least one third of the total opening ventilation surface area
must be in the lower part of the outside wall, flush with the floor.
Minimum temperature
990 l tank
3000 l tank
5000 l tank
3
.
2
- 15 °C - 10 °C
1.6 Kg/h 2.5 Kg/h
2.5 Kg/h 4.5 Kg/h
4 Kg/h 6.5 Kg/h
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• measures to be taken for liquid gas system to ensure
correct, safe operation. 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.
• 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 sizing is foreseen for a supply pressure of
approximately 300 mm W.C. You are recommended to check
the burner gas pressure using a water column manometer.
•

Controlling combustion

To limit consumption and avoid serious trouble, adjust
combustion using the appropriate instruments. 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
combustion analyser or other similar instrument). The warranty
does not cover burners burning liquid gas (L.P.G.) in installations
in which these measures have not been taken.
- 5 °C
3.5 Kg/h
6.5 Kg/h
11.5 Kg/h
- 0 °C + 5 °C
8 Kg/h 10 Kg/h
9 Kg/h 12 Kg/h
16 Kg/h 21 Kg/h