D - Rotation Direction Indicator - Phase Controller; E - Special Oils - Chicago Pneumatic QRS 20 Instruction Manual

6 - Activation/de-activation of no load operating
status
1) Pressing button Item. 1 Fig. 7a the indicator light Item. Q
comes on (flashing), the machine operates on MANUAL
EMPTYING.
2) Pressing button Item. 1 Fig. 7a again the machine returns
to the automatic cycle.
7 - Operating parameters of the controller
The controller is factory set with a value established for the
following parameters :
P0 = Stop pressure (125 - 150 - 175 bar)
P1 = Start pressure (100 - 125 - 150 bar)
r2 = Maximum operating temperature (212 °F)
t3 = Not active
t4 = Not active
C5 = Maximum of on time start ups (10)
Moreover the controller is set to measure pressure in "PSI"
(parameter C7) and temperature in °F (parameter C6).
Pressure and temperature units of measurement are stated in the
table below :
Parameter name
C6
C7
All described parameters may be displayed and changed according
to the procedure stated in paragraph C - 8. The parameter number
appears on the upper screen and the parameter value appears on
the lower screen.
8 - Display and modification of the board's
parameters
Proceed as follows to display the board's parameters :
- Press button Item. 4 Fig. 7a for a few seconds until "P0" appears
(stop pressure) on the upper screen: at the same time, the stop
pressure appears on the lower screen in (125, 150 or 175 PSI).
- Pressing button Item. 1 Fig. 7a displays all board parameters in
sequence on the upper screen (P0, P1, r2, t3, t4, C5, C6, C7)
while the established value for each parameter appears on the
lower screen. To exit the display, press button Item. 3 until a
small point on the screen appears on the symbol.
To change a parameter value, follow the instructions given for
the example below :
E.G. : maximum temperature is top be changed to 203°F.
- Press button Item. 4 fig. 7a for a few seconds until the "P0"
parameter appears on the upper screen.
- Press button Item. 1 Fig. 7a until the "r2" parameter is displayed
(maximum temperature).
Chicago Pneumatic Compressors
62 305 454 65
Parameter value
0 = °C 1 = °F
0 = bar 1 = °PSI
- Press button Item. 4 Fig. 7a : the temperature shown on screen
starts to flash.
- Press button Item. 2 Fig. 7a until 203 is displayed.
- Press button Item. 4 Fig. 7a to confirm the change made ; 203
no stops flashing.
- Exit setting by pressing button Item. 3 Fig. 7a.
From now on the new maximum temperature will be 203°F.
9 - Temperature too low display
The sheet is factory set with a pre-established minimum
temperature at (+36°F), if the value displayed is below this, the
sheet is displayed flashing on the lower screen. This is a fault
warning which does not prevent the compressor from starting,
but informs the operator that ambient temperature is too low.
D - Rotation direction indicator -
Phase controller
1 - Description
The phase controller option enables permanent and easier
verification of the rotation direction of the machine by means of
a LED. This option prevents any risk of physical damage by
disabling the compressor start up in case of phase reversal or if a
phase is disconnected and indicates a machine fault.

E - Special oils

1 - Description
Different oils meet different needs:
Food Grade Oil: use of the compressor in the agricultural food &
beverage industry.
Note: if this option is chosen on a machine that has previously
run on standard oil, the flushing procedure must first be strictly
complied with.
2 - Description of the option
Food Grade Oil
This oil has been specially developed for use as a lubricant that
may come into contact with foodstuffs.
01/2008
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