Hbc Connection Method - Mitsubishi Electric PURY-M200YNW-A1 Service Handbook

[2-10 Restrictions on Refrigerant Pipes ]
2-10-3

HBC Connection Method

(1) Size of the pipe that fits the standard HBC ports
(J)
(F)
(A)
(D)
(J)
(J)
(B)
(J)
(H)
(L)
(E)
(C)
(K)
6 5 4 3
Pump 1 circuit Pump 2 circuit
Fig. 1
Note: 1
To connect multiple indoor units to a port
Maximum total capacity of connected indoor units: W/WP/WL80
Maximum number of connectable indoor units: 3 units
Branch joints are field-supplied.
All the indoor units that are connected to the same port must be in the same group and perform the Thermo-ON/OFF operation
simultaneously.
The room temperatures of all the indoor units in the group need to be monitored via the connected remote controller.
When connecting a W/WP/WL71 through 125 model indoor unit to an HBC, the pipes that connect the unit to the same set of HBC
ports cannot be branched out to connect additional units.
Selection of water piping
Select the size according to the total capacity of indoor units to be installed downstream.
Do not connect multiple indoor units to the same port when operating each of them in different modes (cooling, heating, stop, and
thermo-OFF). The indoor units connected to the same port must be set to operate in the same mode. Set them to the same group
to make them run/stop in the same mode all together. Alternatively, enable the thermo setting on the remote controller, or set the
common thermostat (optional) to run/stop the units in the same mode based on the representative temperature.
When multiple indoor units are connected to a single port, install a pressure control valve in the pipe to equalize the pressure of
all indoor units.
Pressure control valves are required for the "WP-type" and "WL-type without the optional valve kit" indoor units only, and not for
the "W-type" and "WL-type with the optional valve kit" indoor units.
BS_02_L
(F)
(D)
(F)
(I)
(E) (E) (E)
(G)
2 1
(A) To outdoor unit
(B) End connection (brazing)
(C) Main-HBC
(D) Sub-HBC
(D)
(E) Indoor unit
(F) Branch joint (field supply)
(G) Up to three units for 1 branch hole;
(H) Shutoff valve (field supply)
( I ) Pressure control valve (field supply)
(E) (E) (E) (J) Auto air vent valve (Highest point on
(K) Water pipework
(L) Joint (field supply)
Pump 2 circuit Pump 1 circuit
1 2 3 4 5 6 7 8
Fig. 2
Pump 2 circuit Pump 1 circuit
1 2 3 4 5
Fig. 3
total capacity: below 80
(but in same mode, cooling/heating)
the water pipe for each branch)
(field supply)
Pump 2 circuit Pump 1 circuit
9 10 11 12 13 14 15 16
6 7 8
chapter 2 -
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