Bartscher 70 Serie Manual página 79

the market have a tolerance for the operating tension of less than the 50%; therefore, a
suitable switch has to be chosen.
- Connect only a single appliance to each switch.
- In some cases, after long periods of inactivity or in case of a new installation, it is possible
that the appliance switches off during the setting-up. The main reason is usually the moist
produced during the isolation. The problem can be easily solved through a short pre-heating
bypassing the safety thermostat.
Checking gas tightness and pressure (fig. 25 – p. 12).
Before checking the gas pressure, it is necessary to check the tightness of the gas installation up to
the nozzle with a leak-finder spray to ensure that no damage has been done to the appliance during
transportation. Then, it is possible to check the inlet pressure, which can be carried out by means of
a pressure gauge, either a "U" gauge or an electronic gauge with a minimum definition of 0,1 mbar.
In order to measure the gas pressure, remove the screw (1) from the pressure outlet (2) and connect
it to the pressure gauge pipe. Open the appliance gas supply valve, check the pressure output, and
close the valve. Remove the pressure gauge pipe and screw the screws correctly into the pressure
outlet. The pressure valve has to be within the minimum and maximum values shown down below:
(*These gases belong to II
If the pressure measured is not within the limits shown in the table, find out the cause. After solving
the problem, check the pressure again.
Checking the appliance power
Normally it is sufficient to check that the nozzles installed are the right ones and that the burners
function properly. If desired, it is possible to check the power absorbed by using the "Volumetric
Method", measuring the volume of gas output supplied to the appliance in time units with the aid of
a chronometer and a counter. The right comparison volume [E], measured in litres per hour (l/h) or
in litres per minute (l/min), can be obtained using the formula shown below dividing the nominal
and minimum outputs (power) shown in the table of burner features by the lowest heat capacity of
the gas type pre-arranged for the appliance. This value can be found in the norm tables or can be
provided by the local gas supply company.
The reading has to be done when the appliance is already in function.
Type of gas
G20 (Methane)
G20 (Methane)*
G25 (Methane)
G25.1 (Methane)*
G30 (Butane) (3B/P)
G30 (Butane) (3+)
G30 (Butane) (3B/P)
G31 (Propane) (3B/P)
G31 (Propane) (3P, 3+)
G31 (Propane) (3B/P)
category, which is used only in Hungary)
2HS3B/P
E =
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P P P
n min MAX
[mbar] [mbar] [mbar]
20 17 25
25 20 30
25 20 30
25 20 30
28-30 25 35
28-30 20 35
50 42,5 57,5
28-30 25 35
37 25 45
50 42,5 57,5
Power
Heat capacity