C0240111-04-05-GB
5.2) USER MENU
The “user menu” is used to display and set important operating, adjustment, setpoint and “recovery”
parameters. The physical principles lying at the heart of some special functions are described below.
5.2.1 ) ADJUSTMENT
Depending on the type of hardware and the type of compressor used, a choice may be made (for inlet or
outlet temperature) between STEP and QUICK MIND adjustment.
N.B.: some functions, such as setting the compressor type and modulating adjustment, can only be set
from the manufacturer menu.
“XL” Hardware
Other Hardware
Hermetic compressor
x
Step adjustment (inlet only)
x
Quick Mind adjustment (outlet
only)
Alternative compressor
x
Step adjustment (inlet only)
x
Quick Mind adjustment (outlet
only)
Screw compressor
x
Step adjustment (inlet only)
x
Quick Mind adjustment (outlet
only)
x
Modulating adjustment (Quick
mind for outlet required)
Centrifuge compressor
x
Proportional step adjustment for
inlet and integral for outlet
Table 5.3
:
adjustment types depending on the type of hardware and the type of compressor
The various adjustment methods are shown in detail below.
x
STEP INLET ADJUSTMENT METHOD:
The procedure for accessing step inlet adjustment is shown in the parameters annex. The step inlet
adjustment type and adjustment band can be set from the relative parameters in the “user menu”.
Some examples of “step” adjustment for the input variable (inlet temperature) are shown below.
Figures 5.1 and 5.2
show the graphs of the variable controlled according to the power delivered by the
machine for two typical cases.
summer ( n° steps=2 )
P
out
T
in
proportional band
Figure 5.1
:
T
in
is the inlet variable, P
out
is the percentage of delivered power (summer).
ů
= Set + proportional band/2
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