S+S Regeltechnik PREMASREG DS2 Notice D'instruction page 7

G
Mounting and Installation
Mounting diagram
– +
P2 P1
(A)
TYPES OF MONITORING:
(A) Below-atmospheric pressure:
P1 (+) is not connected but open against atmosphere
P2 (–) connected to inside of duct
(B) Filter:
P1 (+) connected upstream of filter
P2 (–) connected downstream of filter
(C) Ventilator:
P1 (+) connected downstream of ventilator
P2 (–) connected upstream of ventilator
Pressure connections at the pressure switch are marked with
P1 (+) for higher pressure and P2 (–) for lower pressure.
Connection
Setting potentiometer
(internal setting)
Conversion table for pressure values:
Unit =
1 Pa
1 kPa
1 bar
1 mbar
1 mH O
0.0980665 bar
2
+ –
P1 P2
(B)
Connecting terminals
secured against turning
bar
0.00001 bar 0.01 mbar
0.01 bar 10 mbar
1 bar 1000 mbar
0.001 bar
98.0665 mbar
DS 2
Connecting diagram
– +
P2 P1
(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.
DS 2
Simultaneously, contacts 1 - 3 close and
can be used as signal contact.
mbar
1 Pa
1000 Pa
100000 Pa
1 mbar 100 Pa
9806.65 Pa
1 3 2
Pa kPa
0.001 kPa
1 kPa
100 kPa
0.1 kPa
9.80665 kPa
Rev. 2021 - V17
DS 2
P
∆
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