Mitsubishi Electric CMB-WM108V-AA Service Handbook page 71

[ II Restrictions ]
2. Connecting the HBC controller
(1) Size of the pipe that fits the standard HBC controller ports
(A)
(B)
(C)
(J)
(H)
(J)
(E)
(E)
HWE1708A
(D)
(F)
(J)
(K)
(J)
(E)
(E) (E)
(G)
(A) To outdoor unit
(B) End connection (brazing)
(C) Main-HBC controller
(D) Sub-HBC controller
(E) Indoor unit
(F) Branch joint (field supply)
(G) Up to three units for 1 branch hole; total capacity: below 80
(I)
(but in same mode, cooling/heating)
(H) Shutoff valve (field supply)
(I) Pressure control valve (field supply)
(E)
(J) Auto air vent valve (Highest point on the water pipe for each branch)
(field supply)
(K) Water pipework
- 62 -
GB