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G
Mounting and Installation
Mounting diagram
(A)
TYPES OF MONITORING:
(A) Below-atmospheric
pressure: ............................... P1 (+) is not connected
(B) Filter: ...................................... P1 (+) connected upstream of filter
(C) Ventilator: ............................. P1 (+) connected downstream of ventilator
Pressure connections at the pressure switch are marked with P1 (+)
for higher pressure and P2 (-) for lower pressure.
Conversion table for pressure values:
Unit =
bar
1 Pa
0.00001 bar
1 kPa
0.01 bar
1 bar
1 bar
1 mbar
0.001 bar
1 mH2O
0.0980665 bar
(B)
but open against atmosphere
P2 ( - ) connected to inside of duct
P2 ( - ) connected downstream of filter
P2 ( - ) connected upstream of ventilator
mbar
0.01 mbar
10 mbar
1000 mbar
1 mbar
98.0665 mbar
DS 2
Connecting diagram
(C)
Specifications regarding switching pressures relate
to vertical mounting and it is recommended to install
the connections downward.
In case of vertical mounting with pressure
connections upward, the switch-on value increases
by 0.2 mbar.
Connection P1 for
higher pressure or less below-atmospheric pressure.
Connection P2 for
lower pressure or more below-atmospheric pressure.
Electrical connections:
Contacts 1 - 2 break when pressure ⁄ differential
pressure rises to the preset value.
Simultaneously, contacts 1 - 3 close and
can be used as signal contact.
Pa
kPa
1 Pa
0.001 kPa
1000 Pa
1 kPa
100000 Pa
100 kPa
100 Pa
0.1 kPa
9806.65 Pa
9.80665 kPa
P
∆
1
3
2
mH
O
2
0.000101971 mH
O
2
0.101971 mH
O
2
10.1971 mH
O
2
0.0101971 mH
O
2
1 mH
O
2
DS 1
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