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8
Setting Operating Parameters
8.1
Generalities
All the control devices are set and tested in the factory before the unit is dispatched. However, after the unit
has been in service for a reasonable period of time you can perform a check on the operating and safety
devices. The settings are shown in Tab. 3 and Tab. 4.
All servicing of the equipment is to be considered extraordinary maintenance and may
be carried out BY QUALIFIED TECHNICIANS ONLY: incorrect settings may cause
serious damage to the unit and injuries to persons.
The operating parameters and control system settings configurable by means of the microprocessor control
are password protected if they have a potential impact on the integrity of the unit.
Tab. 3 Setting of control devices
Control device
Differential air pressure switch (outlet air flow)
Differential air pressure switch (dirty filter)
Tab. 4
Setting of control devices
Control device
Maximum pressure switch
Minimum pressure switch
Modulating condensation control device
Time lapse between two compressor starts
8.2
Maximum pressure switch
The high pressure switch stops the compressor when the outlet pressure exceeds the set value.
The high pressure switch must be manually reset; this is possible only when the pressure falls below the
set differential (see Tab. 4).
8.3
Minimum pressure switch
The low pressure switch stops the compressor when the inlet pressure falls below the set value for more
than 1 seconds. The switch is automatically reset when the pressure rises above the set differential (see
Tab. 4).9
@DNOVA THX_R410A-IOM-1506-E
Warning: do not attempt to change the setting of the maximum pressure switch: Should the
latter fail to trip in the event of a pressure increase, the pressure relief valve will open.
Set point
Pa
50
Pa
50
Activation
Bars-r
42.0
Bars-r
1.5
Bars-r
20
s
300
Differential
30
20
Differential
Resetting
4
Manual
1.5
Automatic
6.5
-
-
17
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