Danfoss iC7 Series Operating Manual page 28

iC7 Series Cooling Modules
Operating Guide
CORROSION HAZARD WITH DRINKING WATER
Some components are made of aluminum, which has limited corrosion resistance against high chloride concentrations. Drinking
water can have a chloride concentration of 250 ppm, which increases the aluminum corrosion rate. High chloride concentration
exposes aluminum especially to pitting corrosion which can damage the system relatively quickly.
-
Use purified (demineralized, deionized, or distilled) water with corrosion inhibitors.
6.10 Antifreeze Mix as Coolant
The following antifreeze products are a good general solution for liquid cooling since they provide freeze protection and corrosion
protection.
The allowed antifreeze coolants are the following ethylene glycols and propylene glycols.
Ethylene glycols
• DOWCAL 100
• Clariant Antifrogen N
Propylene glycols
• DOWCAL 200
• Clariant Antifrogen L
These glycols already include corrosion inhibitors. Do not add any other inhibitor. Do not mix different glycol qualities because
there can be harmful chemical interactions.
The glycol concentration of the coolant must be 25–55% by volume, according to the specified ambient temperature. Higher con-
centration reduces cooling capacity. Lower concentration results in biological growth and inadequate amount of corrosion inhibi-
tors. Antifreeze must be mixed with purified water according to
6.11 Materials
Allowed materials in the cooling system
These materials are allowed in the cooling system if they are compatible with the coolant.
• Aluminum.
• Stainless steel AISI 304/316.
• Plastic.*
• Elastomers (EPDM, NBR, FDM).*
* If plastic or elastomers are used, check material compatibility within the temperature range of the coolant. See
Specifications.
Do not use PVC, copper, brass, or other materials not compatible with the heatsink material or coolant.
Recommended material for pipes
• PA11.
• PA12.
• PEX with oxygen barrier.
• PEX-AL-PEX.
6.12 Pipe Connections
Standard connections are DN50 pipe end with Axilock couplings. The Axilock couplings are included in the delivery.
For the external circuit side, there are DIN and ANSI flanges available.
If the cooling module is not installed in the same line-up as the drives, organize transfer piping between the cooling module and
the drives. DIN and ANSI flanges are also available as option.
28 | Danfoss A/S © 2022.02
C A U T I O N
6.7 Quality Requirements for the Purified
Cooling Installation
Water.
11.9 Liquid-cooling
AQ339830072437en-000202 / 172F0589