IT
EN
FR ES
19
Madas Technical Manual - 9|9.4 - REV. 0 of 8
th
Feb 2019 MTC10
4.1 - DETECTION LIMIT
The device must be capable of detecting a leakage rate of at least 50 dm
3
/h or 0.1% of the burner thermal output. Otherwise,
it must prevent ignition and opening of the burner valves.
4.2 - CALCULATING THE LEAKAGE RATE
The leakage rate can be calculated by using the following formulas:
System with 1 Pressure switch calibrated to P
i
/2:
• Valve leakage rate:
(P
i
– P
set
) x V
p
x 3600
V
1.2
=
P
atm
x t
test
System with 2 Pressure switches:
• Valve V
1
leakage rate:
(P
set1
) x V
p
x 3600
V
1
=
P
atm
x t
test
• Valve V
2
leakage rate:
(P
i
– P
set2
) x V
p
x 3600
V
2
=
P
atm
x t
test
P
i
: Inlet pressure [mbar]
P
set
: Pressure switch setting pressure (P
i
/2) [mbar]
P
set1
: Low pressure switch setting pressure [mbar]
P
set2
: High pressure switch setting pressure [mbar]
V
p
: Test volume [dm
3
]
P
atm
: Atmospheric pressure [mbar]
t
test
: Test time [s]
The test time is a fixed value set on the control board and is equal to 20”.
4.3 - TYPES OF OPERATION
The device can operate in three modes:
The type of operation is selected with the cursors of the deep-switch (3) on the side of the terminal board.
TYPE OF SETTING DEEP SWITCH SETTING LED
STD
EVA
EVP
ON DIP
ON DIP
ON DIP
1
1
1
OFF
OFF
ON
2
2
2
OFF
OFF
OFF
3
3
3
OFF
ON
ON
4
4
4
OFF
ON
OFF
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