Pressure Relief; Start-Up; Normal Operation; Filters Without A Maintenance Indicator - Filtration Group Pi 370 Betriebsanleitung Und Montageanleitung

9.2

Pressure relief

Design measures must be incorporated to prevent
inadmissible excess pressure on the dirty side.
 Install pressure relief valves if necessary.
10

Start-up

This duplex filter must not be put into service until the
relevant machinery into which it is to be incorporated has
been declared in conformity with the applicable EC
ectives, harmonised standards, European standards or
equivalent national standards.
 Loosen the vent screws of the two filters at least one
turn.
 Operate the switch-over handle.
 The safety catch is released.
 The pressure compensation lever opens.
 Shift the switch-over handle to the middle position.
 Fluid flows through both filters.
 Close the vent screws as soon as medium exits from
them (torque: 25 Nm).
 Recover any leaking fluids in a suitable vessel.
 Shift the switch-over handle to the required position so
that it contacts the stop.
 Check that all pipe connections are tight.
 The duplex filter is ready for operation.
11

Normal operation

Please always ensure that you have a
sufficient quantity of original FG replacement
elements in stock. Disposable elements (PS /
Mic) cannot be cleaned.
The following parameters must be monitored daily
during normal operation:
 Differential pressure (if the optional maintenance
indicator is installed)

11.1 Filters without a maintenance indicator

 Replace the filter element after the trial run or after
flushing the unit.
 Comply with the instructions provided by the system
manufacturer.
11.2 Filters with a maintenance indicator
(optional)
During cold starts, the maintenance indicator may give a
warning signal (refer to the accessories documentation for
the maintenance indicator).
 Do not depress the red button of the maintenance
indicator until operating temperature has been reached.
 If it immediately pops out again and / or the electrical
signal is not switched off after reaching operating
temperature, the filter element must be replaced.

11.3 Filtration of cooling lubricants

Fine dirt particles can obstruct the parallel unit when
filtering cooling lubricants.
 Operate the parallel unit regularly, even if the
maintenance indicator has not tripped.
Translation of the original instructions with installation instructions Pi 370 / Pi 3700, Filtration Group GmbH, 28.06.2020, Mat. No. 72412144, Version 06
DANGER!
12

Troubleshooting

Fault Possible cause
Warning signal Cold start
from

maintenance

indicator
Filter element dirty
13 Maintenance
Danger if unauthorised work is carried out on the
unit!
 Risk of injury.
 All maintenance work must be carried out by a suitably
trained person.

13.1 Maintenance work on the parallel unit

 Shut down the duplex filter.
 Take steps to prevent the unit from being switched on
again by unauthorised persons.
 Take any necessary safety precautions
(protective clothing, eye protection, etc.).
 Carry out the maintenance work.
 Start up the duplex filter again.
 Observe the duplex filter.
Does it operate normally?
Remedy
Reset the signal
after reaching
operating
temperature
Replace the filter
element
CAUTION!
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