McQuay MDS080B R Installation Manual page 16

（ 3 ） Multi bifurcation and distributors
● It is not allowed to connect bifurcation with distributor, as shown as below:
Wrong connection
Indoor unit
Controller
7． ． ． ． 3 Connecting of refrigerant piping
● Copper tube selection: to select the main tube and branch tube and get them connected, the table is shown as below:
Outdoor model
Liquid
Gas
<16kW
16kW ≤ C<22.5kW
Liquid
Capacity
22.5kW ≤ C<50kW
50kW ≤ C<85kW
9kW ≤ C<16kW
16kW ≤ C<22.5kW
22.5kW ≤ C<36kW
Gas Capacity
46kW ≤ C<50kW
50kW ≤ C<69kW
69kW ≤ C<85kW
Liquid Tube diameter of indoor unit
Gas Tube diameter of indoor unit
Note: For choosing the piping materials and radial thickness, please refer to Appendix B: R22 Piping Materials/Radial Thickness
●
Selection of bifurcation
According to the diameter tube connected, to use the below table to select the right bifurcation;
Indoor
unit
Controller
Bifurcation
MDS080B(R)/
MDS100B(R)
Outdoor and the first bifurcation
φ 12.7
φ 28.6
φ 12.7
——
<9kW
——
——
——
Branch tube connector and indoor units
Distributer
Wrong connection
Wrong connection
MDS150B(R)/MDS180B(R)
MDS120B(R)
/MDS200B(R)
φ 15.88 φ 15.88
φ 28.6 φ 34.9
Between the gas distributors
—— ——
——
—— ——
—— ——
Same as the indoor connector
Same as the indoor connector
Distributor
MDS220B(R)/ MDS260B(R)/MDS280B(R)
MDS240B(R) /MDS300B(R)/ MDS320B(R)
φ 19.05
φ 38.1
φ 9.52
φ 12.7
φ 15.88
φ 15.88
φ 19.05
φ 22.23
φ 28.6
φ 34.9
——
©2005 McQuay International
15
φ 19.05
φ 41.3
φ 19.05
φ 38.1
φ 41.3