F310 Series
s e r v i c e
i n s t r u c t i o n s
3
5
Routine maintenance
5.1 Pall filters do not normally require special attention
except for periodic monitoring of the differential
pressure warning device. If no such device is fitted, a
specified scheduled time period for replacement must
be adopted.
5.2 If external leakage is noted, replace O-ring at leak.
If leakage persists, check sealing surfaces for scratches
or cracks; replace any defective parts.
5.3 Differential pressure devices actuate when the element
needs changing or because of high fluid viscosity in
‘cold start’ conditions. If ‘cold start’ conditions exist,
see Section 6.2 and 6.3.
5.4 A dirty system can quickly plug a new filter element,
especially with Pall high efficiency filter media.
It may require one or two initial element changes to
reach a stabilized element life. If element life is short
or differential pressure is excessive, filter may be
undersized; refer to the sizing and selection section
of the product literature or contact your local
Pall representative.
5.5 Make sure replacement elements are stored clean and
undamaged, and that a supply of replacement
elements is available.
6
Differential pressure devices
Reference should be made to product literature M&ERCAEN
for dimensions, operating parameters, part numbering, ordering
information and specifications.
6.1 Differential pressure devices actuate when the element
needs changing or because of high fluid viscosity in
‘cold start’ conditions.
6.2 If visual indicator is fitted and actuates during ‘cold start’
(button changes from white to red), it will automatically
reset when the normal operating condition is reached. If
indicator actuates after resetting,
replace element.
6.3 If electrical differential device is fitted the use of both
positive indication (green light) and negative indication
(red light for dirty element) is recommended to
effectively monitor filter element life.
6.4 If the electrical switch actuates (e.g. red light comes on)
during cold start, continue operating until the signal (red
light) goes out as system warms to normal operating
conditions. This feature can be used as ‘warm up’
indication in operating procedures. If the warning signal
(red light) remains or appears when system is warm,
replace the filter element.
All electrical pressure switches have automatic reset.
Electrical connections and ratings for “C” and “U” (normally
closed) differential pressure switch options:
The switch is wired normally closed. Using normally closed
configuration allows for the detection of damaged or broken
cables or disconnection.
All electrical pressure switches have automatic reset.
Maximum Voltage Break AC or DC 48V
Switching Current 0.5A Max
If switch is to be connected to an inductive load or load where
surge current or in rush current flows, then protective circuitry
may be required to lengthen the life of the switch contacts.
PIN 1
PIN 2
V E r S a l o N M E D I U M P r E S S U r E F I l T E r S
F310
EN
