Adding Corrosion Inhibitor When Using A Fresh Water System; Step 2, Electrical Part; Power Supply - Danfoss VACON NX Commissioning And Maintenance Manual

COMMISSIONING
5.1.8 Adding cor r osion inhibitor when using a fr esh water system
If you are using a fresh water system to add water it is more difficult to add the corrosion inhibitor.
The corrosion inhibitor can be added through the manual de-airing valve V162. To do this the water
level has to be lowered in the HX11 and a funnel has to be used (Figure 5.1-13).
1. The corrosion inhibitor should be added after all the main drives have been de-aired. Check
that all the main drive valves, V310...V3xx, are closed.
2. Lower the liquid level in the plate heat exchanger HX11 by opening the valve V301 and letting
out 2 litres of water. This will lower the level inside the HX11 and make the necessary space
for the corrosion inhibitor.
3. Remove the hose from the valve V162 and replace
it with a one (1) meter long hose. Connect a
funnel to the loose end of the hose.
4. Keep the funnel higher up than the heat
exchanger HX11, and pour the corrosion inhibitor
into the HX11 using a jug. Refer to the Cortec
VpCl-649 product description for calculating the
right amount of corrosion inhibitor (refer to the
technical specifications for Cortec found in the
Commissioning and Maintenance folder).
5. After all the corrosion inhibitor is added use the
same jug to fill the HX11 all the way up with
water. When no more water will go into the HX11
then close the manual de-airing valve V162 and
remove the hose.
6. Now open the filling valve V161 and increase the
pressure back to 1.5 bar. The corrosion inhibitor
will get mixed when the pump is rotated for a while.
5.2

STEP 2, ELECTRICAL PART

Only qualified and authorized electricians are allowed to perform electrical work
on the HX-unit.
WARNING

5.2.1 Power supply

The HX-unit uses 3 ~, 400VAC (50Hz) or 3 ~,
440VAC (60Hz), 16 A power supply. The supply
cable has to be dimensioned according to
these values and use cable with heat
resistance of at least +70°C. There are two
alternatives to bring the supply cables to HX-
unit: from under or from above (Figure 5.2-1,
Figure 5.2-2).
Local contacts: http:/ / dr ives.danfoss.com/ danfoss- dr ives/ local - contacts/
Figure 5.2-1 Figure 5.2-2
VACON 2 7
Figure 5.1-13
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