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UR610/690
R E T U R N L I N E F I L T E R S
WARNING:
USE FITTINGS OR ADAPTORS COMPATIBLE WITH
PORTS SUPPLIED AS SHOWN BY PART NUMBER
ON NAMEPLATE AND NOTED IN DATA SHEETS:
USE OF INCORRECT FITTINGS OR ADAPTORS CAN
CAUSE FILTER HOUSING OR MANIFOLD FAILURE
RESULTING IN LOSS OF PRESSURE AND POSSIBLE
SYSTEM FAILURE OR PERSONAL INJURY.
Note: Painting of the filter housing is optional. The coating on the
filter housing is a suitable painting base. Cover the differential
pressure warning device and nameplate if painting of the housing
takes place.
4.8
Bleed filter by opening the vent plug (9) on the cover (4) of the
filter one and one half turns. Jog system and fill filter until all
air bleeds through the plug (filter can be optionally filled using
the fill port (11)), then tighten plug. Pressurize system fully and
check for leaks; if leaks occur refer to section 5.
CAUTION:
Failure to bleed the filter housing adequately will
increase the dissolved air content of the system fluid
which will shorten fluid life and may cause other
problems in the system.
5
Routine maintenance
5.1
Pall filters do not normally require special attention except for
periodic monitoring of the differential pressure warning device.
Schedule replacement of filter element every six months or
sooner, and have ample supply of spare elements available.
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. Body assembly is permanently
assembled at the factory: do not attempt to disassemble the
head (1) or, body tube (2).
5.3
Differential pressure devices actuate when the filter element
(7) 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 stabilize 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 element change labels are clean and undamaged.
Replace illegible labels with the appropriate new labels.
CAUTION:
Continued operation of 610/690 series bypass filters
(valve options A and G), with differential pressure
device actuated, can allow unfiltered flow downstream.
Refer to element change instructions in section 7.
UR610/690 Series
s e r v i c e i n s t r u c t i o n s
6
Differential pressure devices
Reference should be made to product literature 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 stainless steel visual indicator is fitted and actuates
during 'cold start' (red button extends 5mm, 3/16"), reset
by depressing the button when the normal operating
temperature is reached. If indicator actuates after resetting,
replace element. If brass visual indicator is fitted and actuates
during 'cold start' (flag inside indicator changes to red), it
will automatically reset when normal operating temperature
is reached. If indicator is still actuated after normal operating
temperature is reached, replace element.
NOTE: Option 'P' visual indicator has thermal lockout and manual
reset. No signal below 0°C (32°F), signal above 29°C (80°F).
6.3
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 temperature.
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.
6.4
Use of both positive indication (green light) and negative
indication (red light for dirty element) is recommended to
effectively monitor filter element life.
Electrical connections and ratings are dependent on
indicator chosen. Typical values only are shown below:
110 VAC
=
4A (inductive),
4A (resistive)
220 VAC
=
4A (inductive),
4A (resistive)
28 VDC
=
3A (inductive),
5A (resistive)
48 VDC
=
1A (inductive),
1.5A (resistive)
125 VDC
=
0.25A (inductive),
0.5A (resistive)
Maximum inrush - 24 amps.
Underwriter's lab. Inc. listed ratings of pressure switch (Microswitch)
options are:
4 amps at 250 VAC
0.25 amp resistive at 220 VDC
0.50 amp resistive at 110 VDC
Electrical differential pressure switch operation:
When preset differential pressure is exceeded continuity switches
from Normally Closed (NC) - Common to Normally Open (NO) -
Common.
When differential pressure decreases below pre-set value, continuity
returns to Normally Open (NO) - Common to Normally Closed (NC)
- Common.
Figure 1 - Switch Circuit Diagram
NORMALLY
CLOSED
(NC) Pin 2
NORMALLY
OPEN (NO)
Pin 3
See individual indicator options for connection details.
3
LOW DIFFERENTIAL PRESSURE
COMMON
Pin 1
HIGH DIFFERENTIAL PRESSURE
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