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ENG
“EVD mini” +0300036EN - rel. 1.2 - 23.04.2018
4. COMMISSIONING
Note:
•
If the controller does not have a display, see “Network connection”;
•
the default pressure probe is the ratiometric probe, with a measurement
range of -1…9.3 barg;
•
note the unit of measure (K/°F) when setting the superheat set point. To
change the unit of measure, see the “Functions” chapter.
4.1 Commissioning
procedure
Once the electrical connections have been completed (see the chapter
“Installation”) and the power supply has been connected, the operations
required for commissioning the driver depend on the type of interface
used, however essentially involve setting just 3 parameters: refrigerant,
functioning mode
, superheat setpoint.
Important:
• until the commissioning procedure has been completed, control will
not be active;
• (only during commissioning) changing the refrigerant also means
having to change the type of pressure probe.
Power on the driver: the display lights up and the driver awaits the
commissioning parameters, as indicated by the bar on the display:
1. Refrigerant (default = 3: R404A);
2. Type of control (default = 1: multiplexed showcase/cold room);
3. Superheat set point (default= 11 K).
Procedure:
GAS Type
Mode
Super Heat
1.
The display shows the bar at the top: refrigerant (GAS Type)
GAS Type
Mode
Super Heat
2.
Press PRG/Set to display the refrigerant setting
GAS Type
Mode
Super Heat
3.
Press UP/DOWN to modify the value
GAS Type
Mode
Super Heat
4.
Press PRG to save the setting and return to the refrigerant parameter
code (bar at top)
GAS Type
Mode
Super Heat
5.
Press DOWN to move to the next parameter: Mode, indicated by the
bar in the middle.
6.
Repeat steps 2-4 to set superheat settings 1-7 and bypass 8-9;
GAS Type
Mode
Super Heat
7.
Press DOWN to move to the next parameter. For the superheat set
point, the bar at the bottom is shown. Set the superheat set point;
GAS Type
Mode
Super Heat
8.
In the event of bypass control by pressure, parameter _P is shown.
Set the bypass pressure set point.
GAS Type
Mode
Super Heat
9.
In the event of bypass control by temperature, parameter _t is
shown. Set the bypass temperature set point.
GAS Type
Mode
Super Heat
10. Press PRG/Set for 2 s to save the settings, exit programming mode
and activate control. The standard display is shown.
