McQuay MDS080B R - Page 16

©2005 McQuay International
15
Controller
Indoor
unit
Distributor
（ 3 ） Multi bifurcation and distributors
● It is not allowed to connect bifurcation with distributor, as shown as below:
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
MDS080B(R)/
MDS100B(R)
MDS120B(R)
MDS150B(R)/MDS180
B(R)
/MDS200B(R)
MDS220B(R)/
MDS240B(R)
MDS260B(R)/MDS280B(R)
/MDS300B(R)/ MDS320B(R)
Outdoor and the first bifurcation
Liquid
φ 12.7 φ 15.88 φ 15.88 φ 19.05 φ 19.05
Gas
φ 28.6 φ 28.6 φ 34.9 φ 38.1 φ 41.3
Between the gas distributors
<16kW
φ 9.52
16kW ≤ C<22.5kW
φ 12.7
22.5kW ≤ C<50kW
φ 12.7 φ 15.88
Liquid
Capacity
50kW ≤ C<85kW
—— —— ——
φ 19.05
<9kW
φ 15.88
9kW ≤ C<16kW
φ 19.05
16kW ≤ C<22.5kW
φ 22.23
22.5kW ≤ C<36kW
φ 28.6
46kW ≤ C<50kW
—— ——
φ 34.9
50kW ≤ C<69kW
—— —— ——
φ 38.1
Gas Capacity
69kW ≤ C<85kW
—— —— —— ——
φ 41.3
Branch tube connector and indoor units
Liquid Tube diameter of indoor unit
Same as the indoor connector
Gas Tube diameter of indoor unit
Same as the indoor connector
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;
Wrong connection
Indoor unit
Controller
Bifurcation
Distributer
Wrong connection
Wrong connection