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4.1 - DETECTION LIMIT
The device must be capable of detecting a leakage rate of at least 50 dm
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
• Valve leakage rate:
(P
– P
i
V
=
1.2
System with 2 Pressure switches:
• Valve V
leakage rate:
1
(P
) x V
set1
V
=
1
P
• Valve V
leakage rate:
2
(P
– P
i
V
=
2
P
: Inlet pressure
i
P
: Pressure switch setting pressure (P
set
P
: Low pressure switch setting pressure
set1
P
: High pressure switch setting pressure
set2
V
: Test volume
p
P
: Atmospheric pressure
atm
t
: Test time
test
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:
TYPE OF SETTING
STD
EVA
EVP
The type of operation is selected with the cursors of the deep-switch (3) on the side of the terminal board.
Madas Technical Manual - 9|9.4 - REV. 0 of 8
) x V
x 3600
set
p
P
x t
atm
test
x 3600
p
x t
atm
test
) x V
x 3600
set2
p
P
x t
atm
test
/2)
i
DEEP SWITCH SETTING
Feb 2019
th
/h or 0.1% of the burner thermal output. Otherwise,
3
/2:
i
[mbar]
[mbar]
[mbar]
[mbar]
[dm
]
3
[mbar]
[s]
ON DIP
1
2
3
4
OFF
OFF
OFF
OFF
ON DIP
1
2
3
4
OFF
OFF
ON
ON
ON DIP
1
2
3
4
ON
OFF
ON
OFF
19
LED
MTC10
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