© LNS FOX Instruction manual series WS (USA) pag. 17 of 28 - rev. 06-2014
6. Maintenance
“Personal safety – integrity of the unit”
•
Before inspecting the unit:
-
Press the stop button on the thermal switch, lock the control panel and take key
away.
-
Isolate the unit from electrical power source ensuring that nobody can it.
-
Signal with proper signs that maintenance operations are undergoing.
-
During maintenance operations wear appropriate safety protective gears such as:
gloves, goggles, shoes and so on.
•
In order to avoid possible damages to people or objects be sure that maintenance
is undertaken by qualified personnel and in respect of safety procedures.
•
Before reusing nuts and bolts make sure that they are in perfect conditions
otherwise replace them with new ones. Self locking nuts must always be
replaced.
Note
Maintenance intervals displayed on the following table refer to an average situation and they can
change depending on the type and quantity of the pollutant to be eliminated.
6.1. Maintenance schedule
Clean
Replace
Check
PRE-FILTRATION
(Stage 1)
Pre filtration case
1000 hrs
Prefilter
1000 hrs
CENTRIFUGAL FILTRATION
Filterless vibration free
(Stage 2)
Impeller case
2000 hrs
Drainage ring
2000 hrs
Impeller
2000 hrs
MAIN FILTRATION
(Stage 3)
Cartridge
When signalled by
pressure gauge
6.2. Ordinary maintenance
6.2.1. Pre filter (stage 1) maintenance
-
Unlock and open draw latches (a)
-
Hold the handle and lift the upper part of the unit
-
Unscrew wing nut securing the prefilter(b)
-
Remove the prefilter cartridge (c)
“integrity of the unit”
Cleaning must NOT be undertaken with tools such as metallic brushes in order to avoid possible
damages to the surfaces and to the internal sealing of the case
-
unscrews prefilter wind nut
-
remove upper cover and the outer metallic filtration stage (emulsion version only). If clogged, it must be
cleaned with a brush
-
remove the filter media
-
carefully remove possible residuals from the bottom of the unit
-
verify that the drain slotes are not clogged
-
verify the seal placed between the prefilter (stage 1) and the impeller case is intact and without leaks
-
Wrap new filter set on the filter’s structure ensuring proper closing and positioning
-
Reinstall outer metal screen (Emulsion version only), put the top back and secure it.
“Note”
If the drainage slotes are obstructed, remove and clean impeller case as described in “Centrifugal
stage Maintenance”. If seal is damaged or broken it must be replaced as described in “Seals
maintenance”
