Temperature Alarm Settings - Danfoss VACON NX Commissioning And Maintenance Manual

3 8 VACON
recommended to add a water/air condenser with built in fan to reduce the temperature inside the
main drive cubicle. If a water/air condenser is used to regulate the temperature inside the main
drive cubicle the drive must be made airtight (e.g. IP54).
A last resort is to install an air conditioner that can regulate both the humidity and the temperature
at the installation (electrical room). This is a safe but usually a very expensive option.
If the temperature of the liquid in the secondary circuit is lower than the room temperature, and the
relative humidity is high, condensation might occur on the secondary circuit piping and the plate
heat exchanger inside the HX-unit. This is not dangerous, however nor is it desirable. If there
appears condensation inside the HX-unit it might trigger the leak sensor (LS11) on the HX-unit floor
customer insulate the secondary circuit piping and the plate heat exchanger inside the HX-unit to
On request the HX-unit secondary circuit and the plate heat exchanger can be insulated before
delivery.
5.3.7 Temper atur e alar m settings
The temperature alarm levels depend on the primary circuit temperature set point. Refer to chapter
5.3.6, Temperature set
The over temperature alarm
•
Activates a function that will activate the yellow indicator light on the HX-unit electrical box.
The value is set to 3
setting of the high-temperature shutoff is 28
•
When this alarm is activated the HX-cont
Exampl e, over temper atur e al ar m
The primary circuit temperature set point is set to 35 degrees, then the over temperature alarm
parameter (P2.10.9) should be set to 38 degrees.
The over temperature fault
•
Activates a function that will shut down the drives but will keep the HX-unit running, is set to

10 C higher than the primary circuit temperature set point. The default setting of the high-
temperature shutoff is 40
•
When this alarm is activated the HX-c
And both the red and the yellow indicators on the electrical box will be active.
Exampl e, over temper atur e faul t
The primary circuit temperature set point is set to 35 degrees, then the over temperatur e fault
parameter (P2.10.10) should be set to 45 degrees.
The HX-unit over temperature fault is designed to work as protection in case of a sudden change in
the primary circuit for example if the flow in the secondary circuit for some reason is stopped.
5
points.

C higher than the primary circuit temperature set point. The default

C.
Local contacts: http:/ / dr ives.danfoss.com/ danfoss- dr ives/ local - contacts/

C.
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