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Warning
The gas valve group is set for a maximum supply pressure of 60 mbar.
If the supply pressure exceeds this value, the valve safety membrane may rupture and put the valve into a
permanent safety block.
Warning
Before starting the heater in heating mode, check the direction of fan rotation:
• Make sure that the two switches, A and B are in the off position (0)
• Connect the power line to the space heater
• Start only the ventilation (switch B) for a few seconds
• Check that the direction of rotation of the fan matches the direction shown on the fan itself
To check or change the gas valve setting, it will be necessary to first check that the gas supply pressure, p
gas valve inlet) and the burner pressure, p
set as indicated in Table I or II for the selected gas category.
Therefore, measure the two pressures p
ranges. Then:
1) Turn off the space heater and disconnect the power supply.
2) Close the gas supply stopcock (10).
3) Open the pressure tap (12) at the gas valve inlet and connect the first pressure gage to read the supply pressure,
p
.
a
4) Open the pressure tap (13) at the gas valve outlet and connect the second pressure gage to read the burner
pressure, p
.
b
L-L 299.00-BM
EN
, (at the gas valve outlet) correspond exactly to the pressure values to be
b
13
12
16
SIT 822 NOVA
and p
, at the same time, using two digital pressure gages with suitable
a
b
14
15
, (at the
a
65 / 116
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