Dungs AA C2 Series Instrucciones de instalación - Página 2
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SWITCH HYSTERSIS AND PRESSURE CONNECTIONS
Definition of switching hysteresis ∆p
The pressure difference between the upper and
lower switching pressures.
Connection p1
Connection p2
must remain open
System vacuum monitor
AA...C2 is connected to the air duct
with the p2 (-) connection. p1 (+) is not
connected with the air duct.
Do not seal the p1 (+) connection; it must
be open to the atmosphere.
Caution: Prevent dirt from entering into
the device through connection p1(+).
Always connect higher pressure to
connection p1 (+).
Always connect higher vacuum to
connection p2 (-).
APPLICATION AND CONNECTION EXAMPLES
Connection p1
Filter monitoring
To monitor a filter, the AA...C2 can be
connected as shown above.
Example of pressure connections
higher pressure:
e.g. 3.5 in W.C.: connection p1 (+)
lower pressure:
e.g. 3 in W.C.: connection p2 (-)
4 x o 0.1
(4 x o 2.5)
0.5 (12) deep
Connection p2 Connection p2
Connection p1
Blower monitoring
For blower monitoring, connect con-
nection p1 (+) to the air duct on the
downstream side of the blower and con-
nection p2 (-) to the air duct upstream
of the blower.
Example of vacuum connections
lower vacuum:
e.g. -1 in W.C.: connection p1 (+)
higher vacuum:
e.g. -3 in W.C.: connection p2 (-)
2 ... 4