Renfert Vario jet Mode D'emploi page 18

6. Cleaning / Maintenance
From time to time your Vario Jet automatic will need
maintenance. This consists of checking the connec-
tion leads and pipes for seals and damage as well
as cleaning the plate. Use only solvent-free cleaning
fluid when cleaning (e.g. soapy water).
6.1 Condensed Water
Occasionally check whether water has formed in the
maintenance unit. If so, press the drainage valve on
the maintenance unit (Fig. 20-A).
6.2 Removal of blasting
residue
A sieve which is divided into two sections is used for
retaining the blasting material residues. (Fig.24).
Removing the blasting material:
1. Remove the basket (see chapter 5.7).
2. Remove the left hand sieve. Blasting material
residues can be carefully emptied into the right
hand sieve. (Fig. 25).
3. Remove the right hand sieve and dispose of the
blasting material residues. (Fig. 26).
4. Replace the right hand sieve.
5. Replace the left hand sieve.
6. Insert the basket.
6.3 Changing the Blasting
Material
To change the blasting material stand the unit on the
table and pull it slightly over the edge of the table
until the drainage lid on the bottom of the unit is visi-
ble (Fig. 27).
Attention: risk of tilting over!
Place a suitable vessel underneath this opening
(Fig. 28) and loosen both knurled screws to let out
the sandblasting material (Fig. 29).
Tighten the lid again using the knurled screws and
check that the sieve at the base of the sand silo has
no impurities in it (Fig. 30) >>> if it does remove
them. Fill with new sandblasting material (Fig. 17).
Tips & Tricks:
Long-term tests have shown that optimum
blasting efficiency is achieved with 125 µm
[115 mesh] grain size.
6.4 Changing the Nozzles
• Remove the sandblasting nozzle from the holder.
• Loosen the knurled screw (Fig. 31).
• Pull the nozzle out (Fig. 32).
• Inspect the mixing chamber for wear and remove
any abrasive residue (Fig. 33).
• Insert the new nozzle.
• Retighten the knurled screw hand-tight.
Note:
A setscrew was used in previous versions in-
stead of the knurled screw. Loosen the setscrew
using the Allen key included in the accessory kit
and retighten it HAND-TIGHT after insertion of
the new nozzle (Fig. 31a).
EN
6.5 Changing the Viewing
Pane
Loosen the crosshead screws on the top hinge
(Fig. 34). Remove the pane (Fig. 35). The new pane
can now be easily mounted by feeding it through the
upper holder from one side and then carefully tight-
ening the crosshead screws.
Make sure the coated side of the pane is facing
into the chamber!
Note: The slight dents in the glass coating will
disappear after a short time.
Tips & Tricks:
Occasionally clean the inside of the pane using
a damp cloth in order to remove the cloudiness
caused by fine dust.
6.6 Changing the Fluorescent
Lamp
Unplug the mains cable!
Pull down the fluorescent lamp out of its clamps
(Fig. 36 - 37). Now completely remove the protec-
tive pipe from its socket (move to the right) and take
out the fluorescent lamp (Fig. 38). Replace the lamp
by carrying out the above process in reverse. Make
sure that the fluorescent pipe is fed correctly into
the rubber holder in the protective pipe (Fig. 39) and
that the reflector is positioned correctly. In order to
guarantee perfect functioning of the unit you should
also make sure that no blasting material get into the
lamp. Only use original lights with inte-grated starter
and 11 Watt power (see replacement parts list)!
When changing the lamp do not bend it
(danger of breakage!). Wear gloves or use
a cloth to avoid glass splinters.
Do not pull the power supply cable of the
lamp!
6.7 Changing the Hose within
the Blasting Chamber
The blasting hoses are prone to natural wear and
tear and must, therefore, occasionally be replaced.
Disconnect the Vario jet from the compressed air
supply. Loose the hose clip and insert new hoses
(Fig. 40 - 41).
Only use Renfert replacement hose!
7. Spare Parts
You can find components subject to wear and the
spare parts on the spare part list in the internet at
www.renfert.com/p918.
The components excluded from the warranty (such
as consumables or parts subject to wear and tear)
are marked on the spare part list.
Serial number and date of manufacturing are shown
on the type plate of the unit.
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