Honeywell
• 61
C
OMMISSIONING
6.3
Installation in IT system
If your supply network is an IT (impedance-grounded) system but your drive is EMC-protected according
to class C2 you need to modify the EMC protection of the drive to EMC-level C4. This is done by removing
the built-in EMC jumpers with a simple procedure described below.
NOTE:
Honeywell SmartDrive HVAC 230V products with letter ‘T’ in the end of the product
code (HVAC230-xxx-xxT) are as standard configured to IT-networks and do not need any mod-
ifications.
6.3.1
Frames MR4 to MR6
Figure 51. Locations of the EMC-jumpers in frames MR4 to MR6
Figure 52. Removing the jumper, MR5 as example
Warning! Do not perform any modifications on the drive when it is con-
nected to mains.
1
Remove the main cover of the drive (see pages 28 and 28) and locate the jumpers
connecting the built-in RFI-filters to ground. See Figure 51.
2
Disconnect the RFI-filters from ground by removing the EMC-jumpers using long-
nose pliers or similar. See Figure 52.
MR4
MR6
MR5
