KKT chillers nBoxX 1.5, Operating Instruction, Page: 35 / 48

35 / 48 83000902.Ka
Distilled or demineralised water may only be used in cooling units that have been specified for this
purpose.KKT recommends the use of water-glycol mix or Antifrogen N by Clariant as a concentrate.
water-glycol mix relation Quantity
Glycol + Water
Outdoor 1:2 10 l
25 l
200 l
=
Ready-mix (water-glycol mix)
Indoor 1:4 10 l
25 l
200 l
20 – 30% MAX 70 – 80% MAX
Check the cooling medium circuit:
Check the cooling medium circuit: Check the cooling medium circuit:
Check the cooling medium circuit:
•
Regularly check the level in the cooling medium tank.
•
Regularly check the quality of the cooling medium. Measure the glycol content with a refractom
refractom refractom
refractome-
e- e-
e-
ter
ter ter
ter. If necessary, improve the quality as described above. If you have any questions about this,
please contact our service department.
The accordant refractometer to fill in the right mixture is available as a spare part at the KKT chillers
service.
Note! Note! Note! Note!
A significant growth in fouling or germs may be the result if water is used on its own.
Note!
Note! Note!
Note!
When glycol is used, the cooling performance may be reduced, depending on the
glycol concentration. See the following table.
water water water water----glycol mix glycol mix glycol mix glycol mix
Temp.
Temp. Temp.
Temp.
[°C]
[°C] [°C]
[°C]
Loss of
Loss of Loss of
Loss of cooling performance compared with
cooling performance compared with cooling performance compared with
cooling performance compared with
pure water [%]
pure water [%] pure water [%]
pure water [%]
Antifrogen standard (20% glycol)
Antifreeze: –10°C
10 –6
15 –6
18 –6
Antifrogen outdoor (30% glycol)
Antifreeze: –20°C
10 –13
15 –13
18 –13
Note! Note! Note! Note!
Other types of antifreeze are possible in specific cases, however only in consultation
with the manufacturer.