Checklist Before Starting Main Nx Drives - Danfoss VACON NX Commissioning And Maintenance Manual

4 4 VACON
2
1,9
1,8
1,7
1,6
1,5
1,4
1,3
1,2
1,1
1
0%
Diagram 5.4-4 Converting table for the FTSA11 flow switch
Converting formula for the FTSA11 flow switch:
HXL-120 AISI
x = 5.7 * y *B
y = x / 5.7 / B
5.4.3 Checklist befor e star ting main NX dr ives
After the de-airing, when the control unit setup and the flow adjustment are performed and the HX-
unit has been running for 30 minutes without any alarms, the main drive can be brought online. If
there is more than one AC drive, it is recommended that they be started up one by one to avoid any
sudden changes in the temperature. The load of the drives should also be increased step by step,
otherwise the temperature might change too fast and cause an alarm, or in the worst case, a drive
malfunction.
Before starting the drives:
5
HX_-120 Glycol content factor B
20%
GLYCOL CONTENT
Local contacts: http:/ / dr ives.danfoss.com/ danfoss- dr ives/ local - contacts/
, where y = FTSA11 display (%)
x = flow l/min
B = Glycol content factor:
100% water -> B =1
20% glycol / 80% water -> B=1.35
40% glycol / 60% water -> B=1.82
COMMI SSI ONI NG
40%