High Reliability; Nr. 1 Anti-Corrosion Treatment - Vrvii - Daikin VRV II Series Technical Data Manual

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High reliability

3-1

Nr. 1 anti-corrosion treatment - VRVII

• Special anti corrosion treatment of the heat exchanger provides 5 to 6 times greater resistance against acid rain and salt corrosion. The provision of
rust proof steel sheet on the underside of the unit gives additional protection.
Improvement in corrosion resistance
Salt corrosion
Acid rain
Performed tests
contents of 1 cycle (7 days):
• 24 hours salt spray test SS DIN 50021
• 96 hours humidity cycle test KFW DIN 50017
• 48 hours room temperature & room humidity
testing period : 5 cycles
contents of 1 cycle (48 hours):
according to DIN50018 (0.21)
testing period : 40 cycles
• VRVII & VRV-WII features
Corrosion resistance rating
Heat exchanger
2 Kesternich test (SO2)
10
9
8
7
6
5
4
3
2
1
0
1 2 3
• Systems • VRVII & VRV-WII features
Non-treated
1
1
1 VDA Wechseltest
8
6
4
2
0
1 2
4 5 6 10
Cycle
Anti-corrosion treated
5 to 6
5 to 6
An anti-corrosion heat exchanger cutaway view
Hydrophilic film
Aluminium
Corrosion-resistant Acrylic resin
3 4 5
Cycle
20 30 40
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Bare aluminium
Daikin P.E.
Bare aluminium
Daikin P.E.
9