Danfoss PAHT G, Руководство по эксплуатации

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180R9383 | AQ121686503103en-000803 | 33 © Danfoss | 2023.03
Data sheet Product type
7.3 Open-system design
A Inlet line:
Dimension the inlet line to obtain minimum
pressure loss (large flow, minimum pipe
length, minimum number of bends/
connections, fittings with small pressure
losses and restrictions).
B Inlet filter:
Install the inlet filter (1) in front of the
PAHT G pump (2). Please consult the
Danfoss filter data sheet for guidance on
how to select the right filter.
C Monitoring pressure switch:
Install the monitoring pressure switch (3)
between the filter and the pump inlet. Set
the minimum inlet pressure according to
specifications described in item 4, technical
data. The monitoring pressure switch stops
the pump if inlet pressure is lower than the
set minimum pressure.
D Monitoring temperature switch:
Install the monitoring temperature switch
(4) between the filter and the pump, on
either side of the monitoring pressure
switch. Set the temperature value accord-
ing to technical data, item 4. The monitor-
ing temperature switch stops the pump if
inlet temperature is higher than the set
value.
E Hoses:
Always use flexible hoses (5) to minimize
vibrations and noise.
F Inlet pressure:
In order to eliminate the risk of cavitation
and other pump damage, pump inlet
pressure must be maintained according to
specifications described in item 4, technical
data.
G Non-return valve (6):
Should be installed after the outlet to
prevent pump backspin, which may ruin
the pump.
H Pressure relief valve:
As the Danfoss PAHT G pump begins to
create pressure and flow immediately after
start-up regardless of any counter pressure,
a pressure relief valve (7) should be
installed to prevent system damage.
Note: If a non-return valve is mounted in the
inlet line, a low-pressure relief valve is also
recommended between the non-return valve
(8) and the pump to protect against high-pres-
sure peaks.
M
2
SYSTEM
1 4 5 5 6
7 3
PI
PI
8
Data sheet