[2-10 Restrictions on Refrigerant Pipes ]
(3) Size of the pipe that fits the sub BC controller ports
To Main BC controller
*1
Reducer
(Standard supplied parts)
Indoor
P18 model or below P24 - P54 models P72 - P96 models
The ports of the BC controller accommodates the pipes on P24 - P54 models of indoor units. To connect other types of indoor
units, follow the procedure below.
1) To connect P06 - P18 models of indoor units use the reducer that is supplied with the BC controller.
2) To connect the P72 through P96 models of indoor units (or when the total capacity of indoor units is P55 or above), use
an optional twinning pipe kit (Model: CMY-R160-J) to merge two ports before connecting them.
3) To connect multiple indoor units to a port (or to a junction pipe)
Maximum total capacity of connected indoor units: P54 or below (in a system with a junction pipe: P96 or below)
Maximum number of connectable indoor units: 3 units
Branch joint: Use CMY-Y102S-G2 (optional accessory).
Refrigerant pipe selection (size of the pipes in sections A and B in the figure above): Select the proper based on the total
capacity of the downstream indoor units, using the table below as a reference.
Total capacity of indoor units
P54 or below
P55 - P72
P73 - P96
Operation
On the BC controller
side
HWE13080
Connection: Brazed connection
*2
Junction pipe kit
BC controller (sub)
(Model name:
CMY-R160-J)
(Optional accessory)
Indoor
Indoor
Liquid pipe
ø9.52 [3/8"]
ø9.52 [3/8"]
ø9.52 [3/8"]
Total capacity of the in-
door units that are con-
High-pressure side
nected to the BC
controller
ø15.88 [5/8"]
P72 model or below
(Brazed connection)
P73 - P108
ø19.05 [3/4"]
(Brazed connection)
P109 - P126
P127 - P144
(Brazed connection)
P145 - P168
- 61 -
Branch joint (Model name:CMY-Y102S-G2)
(Optional accessory)
A
B
Indoor
Indoor
3*
Maximum of 3 units per port
Total capacity of P54 or below
(All units connected to the same port
must be in the same operating mode.)
Pipe sections
Low-pressure side
(liquid)
(gas)
ø19.05 [3/4"]
(Brazed connection)
ø22.2 [7/8"]
(Brazed connection)
ø28.58 [1-1/8"]
ø22.2 [7/8"]
(Brazed connection)
Indoor
Unit : mm [inch]
Gas pipe
ø15.88 [5/8"]
ø19.05 [3/4"]
ø22.2 [7/8"]
Unit : mm [inch]
Liquid pipe side
ø9.52 [3/8"]
(Brazed connection)
ø12.7 [1/2"]
(Brazed connection)
ø15.88 [5/8"]
(Brazed connection)
GB
Need help?
Do you have a question about the PURY-HP72 and is the answer not in the manual?
Questions and answers
what is the set up mode for recovery, and charging of sys?
Why can control my indoor unit with centralize control
You may not be able to control your Mitsubishi Electric PURY-HP72 indoor unit with centralized control for the following reasons:
1. The power jumper connector on the outdoor unit may not be correctly set. It should be connected to CN40 on only one outdoor unit.
2. The central control switch (SW5-1) on the control board of all outdoor units must be set to "ON."
3. Address settings may not be correctly configured. The main indoor unit should be assigned the smallest address (e.g., IC00), and correct port number settings are required.
4. If using a remote controller alone, an interlock setting from the remote controller is needed.
5. Both ME and MA remote controllers cannot be connected to the same indoor unit group.
6. System controller power issues may occur if the outdoor unit fan rotates due to external forces, causing the system controller to detect an error.
7. Improper wiring or incorrect voltage at TB7 may also prevent operation.
Check each of these conditions to ensure proper centralized control.
This answer is automatically generated
Why can’t control indoor unit with centralize control and stay the MA control set up can’t. Control the mode
The Mitsubishi Electric PURY-HP72 indoor unit cannot be controlled with centralized control and the mode control setup does not function due to the following reasons:
1. Central control is not possible if the indoor/outdoor transmission line is used, even if TB7 terminals are daisy-chained.
2. Shielded cables must be used, and the connection must only be made after confirming the voltage is below 20 VDC.
3. Improper connection of the transmission line for centralized control, such as not correctly daisy-chaining terminals M1 and M2 or not short-circuiting the earth and S terminals on TB7.
4. If a power supply unit is not connected to the centralized control line, the power jumper connector must be moved from CN41 to CN40 on one outdoor unit—if this is not done, mode control will not function.
5. Overlapped indoor unit addresses or noise interference on the remote controller lines can also prevent proper control.
6. Failure to set one MA remote controller to MAIN or exceeding its capacity can result in control failure.
All these factors must be correctly configured for centralized and mode control to function properly.
This answer is automatically generated