Daikin VRV II-Q RQYQ8-48PY1B Service Manual page 25

SiBE341027
For the existing piping, please check the followings
• The existing piping should meet the condition of design pressure 3.3MPa.
Concretely, it should meet the minimum thickness for VRVIII-Q shown in the table below.
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Existing Daikin R-22 piping meets the minimum thickness of VRVIII-Q.
• The existing piping should not be corroded on the external appearance.
Outer diameter of piping
φ 6.4
φ 9.5
φ 12.7
φ 15.9
φ 19.1
φ 22.2
φ 25.4
φ 28.6
φ 31.8
φ 34.9
φ 38.1
φ 41.3
Taper grade (O type, 1/2H type) in the table indicate the material types specified in JIS H3300.
In case of bending O material, set the round bending to 3xD or more (D: Outer Diameter)
1/2H materials are calculated without setting the bending.
General Information
VRVIII-Q
Minimum thickness
Material
(mm)
0.4
0.5
0.7
0.9
1/2H 0.6
1/2H 0.6
1/2H 0.7
1/2H 0.8
1/2H 0.9
1/2H 1.0
1/2H 1.1
1/2H 1.1
Daikin for R-22 (for reference)
Minimum thickness
Material
(mm)
0.80
0.80
0.80
0.99
0.80
1/2H 0.80
1/2H 0.88
1/2H 0.99
1/2H 1.10
1/2H 1.21
1/2H 1.32
1/2H 1.43
Features
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