Vacon NX User Manual page 59

INSTALLATION
45,0
40,0
35,0
30,0
25,0
20,0
15,0
10,0
0,00
The liquid carrying hoses from the network to the cooling elements of the drive must not be
electrically conductive. Risk of electrical shock and device damage! To avoid electrochemical
corrosion, it is necessary to add an inhibitor (e.g. Cortec VpCI-649l in the cooling liquid.
The following main line hose materials are allowed for a liquid cooled drive including an aluminum
heatsink:
• plastic (PVC)
• rubber (EPDM & NBR only)
The following main line hose materials are allowed for a liquid cooled drive including a nickel
coated aluminum heatsink:
• plastic (PVC)
• rubber (EPDM & NBR only)
• copper
The hoses must tolerate a peak pressure of 30 bar.
Connect the line hose to its counterpart (screw connector or fast connector) on the cooling element
of the frequency converter/inverter. The coolant inlet connector is the one closer to the mounting
plate and the outlet connector the one closer to the face of the drive, see Figure 32. Due to high
pressure in the line hose, it is recommended to equip the liquid line with a shut-off valve, which
makes the connection easier. In order to prevent water from spraying in the installation room we
also recommend to wrap e.g. linters around the connection on installing.
Vacon furthermore recommends to equip the pipe branches to the cooling elements with valves.
5.2.2.2 Installation of flow switch
As stated on page 51, Vacon recommends the installation of flow supervision in the liquid cooling
system. If requested, Vacon delivers the flow switch as option. The specification of the flow switch
as well as notes as concerns its installation are given below.
About the installation
Vacon recommends to mount the flow switch on the inflow side of the system (see Figure 24). Pay
attention to the direction of flow. The switch reaches the highest accuracy when it is mounted in
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
CH7, pressure loss
0,50 1,00 1,50 2,00
Pressure loss, bar
Figure 30. Pressure loss, CH7x
• aluminium
• other stainless and acid-proof materials
• aluminium
• brass
• other stainless and acid-proof material
Pressure loss; element (SEE-
PEJ)
Pressure loss; outflow hose;
(PEJ-PLJ)
Pressure loss; inflow hose (SEL-
SEE)
Pressure loss; Tema, inflow
(SET-SEL)
Pressure loss; Tema, outflow
(PLJ-PTJ)
Pressure loss total (inflow hose,
element and outflow hose)
2,50
Pressure loss total (Tema, inflow
and outflow hoses, element)
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