© LNS FOX Instruction manual series WS (USA) pag. 20 of 28 - rev. 06-2014
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Secure the draw latches to the upper part of the unit and rotate them until safety springs snap.
“integrity of the unit”
The length of the latch is adjustable and it is preset from factory in order to have correct load and
sealing. Do not change their setting in order to avoid possible problems.
6.2.2. Main filter (stage 3) maintenance for OIL and EMULSION versions
“Personal safety”
Never remove the main filter (stage 3) while the unit is on. Removal of main filter while the unit is
functioning can result in mechanical damages due to the rotation of the impeller.
The clogging status of the main filter is monitored by the pressure gauge located to the left of the control panel
box.
Replacement of the main filter is suggested when the pressure gauge indicates the following values:
Model
WS 170
WS 330
WS 700
WS 1020
WS 1250
Max Pressure at 60 Hz
380 Pa
450 Pa
800 Pa
850 Pa
900 Pa
“Safety of the people”
Do not remove the main filter cartridge (stage 3) while the unit is on. In order to avoid accidental
removal of this filter by unauthorized personnel secure the nut with a tool.
Removal of this filter, while the unit is on, can cause dangerous mechanical problems due to rotation
of the impeller
Replacement of the main filter :
2a check pressure gauge
2b remove upper cover (WS170-
300-1700 with magnetic catches)
2c remove upper cover (WS1020,
WS1250 with
Quarter Turn Fasteners)
2d unscrew nut
2e remove main filter cartridge
2f Replace the filter cartridge with a
new one and securing it with the nut
“Note”
The main cartridge (stage 3) is made of fibreglass and can not be regenerated.
6.3. Special maintenance
6.3.1. Centrifugal filtration (stage 2) maintenance
Normally the centrifugal stage does not require any maintenance. On some applications it may be necessary to
periodically clean the drainage ring and the relative holes according to the following procedure:
•
Unlock the 2 draw latches hinges and lift the upper part of the unit
•
Unscrew knob and remove filter
•
Unscrew nuts securing impeller case/drainage ring
•
Only if necessary proceed with the removal of the impeller (see cleaning of the impeller)
