Mechanical Settings - WMF Series 8400 bistro Service Manual

WMF bistro! Service manual
8

Mechanical settings

8.1 Setting basic grinder clearance
™ Turn grinding-disk on block, turn central screw clockwise
until a slight contact of the running grinder disks is audible.
™ Fit grinding-disk scale
™ Turn grinding-disks 4 scale steps backwards (1 scale step
equals 0.05 mm) which gives the basic clearance of 0.2 mm
™ Fit disc 33.1324.7000 in such a way that its cam prevents
further screwing down.
™ Set scale with the number 0 towards the upper marking and
stick it on.
Setting standard grinding-discs ("Rossi" 33.0693.000:
Basic settings for left grinder (espresso): 1.5
Basic setting right grinder (Café creme): 3.5
Basic setting for 1 grinder only: 2.6
Settings for Ditting grinding-disks 33 .9462.6000:
Grinding degree is 1 degree finer than standard.
8.2 Adjusting pressure reducer
™ Turn off external water tap
™ Open stopcock on water filter, depressurize and close cock
again.
™ Open front panel, remove front protective cover.
™ Remove blind nipple from the plug-in connector of the
espresso pump
™ Connect adjusting tool 33.2730.0000, to the plug-in
connection of the espresso pump. Hold loose end into the
drip tray.
™ Turn on external water-tap again.
(Attention, water will run out of the setting-tool).
™ Adjust pressure reducer by turning the set-screw to 0,23
+/- 0,01 MPa (2,3 +/- 0,1 bar) flowing pressure.
™ Static pressure can be measured with the blind nipple of
the setting-tool, Setpoint 0,26 ± 0,036 MPa (2,36 ± 0,36
bar) turn of external water-tap.
™ Dismantle setting-tool, replace blind nipple, turn on
external water-tap again.
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Service manual WMF bistro! Edition 08/2011