Installation Manual

BU Module

Table 8

NO. Name Port A

(mm)

Port B

(mm)

1 ĭ15.9ĺĭ19.05 ĭ15.9 ĭ19.05

2 ĭ9.52ĺĭ12.7 ĭ9.52 ĭ12.7

3 ĭ9.52ĺĭ15.9 ĭ9.52 ĭ15.9

4 ĭ6.35ĺĭ9.52 ĭ6.35 ĭ9.52

Fig. 17

2) Install the piping adapter

ķ Refer to the piping connection size of the outdoor unit and indoor units, the appropriate piping

adapter should be adopted.

ĸ Align the flared end of copper tube with the center of pipe joint. Tighten the nuts with hands.



Fig. 18

3) Sealing the unconnected port

If the port of BU module indoor side does not connected to one indoor unit, the port must be

sealed to prevent refrigerant leaks. Please tighten the flaring nuts of the unconnected port with torque

wrench until you hear a “click”.

5.4 Installation of Piping Adapter (RFX12A and RFX13A)

If the piping connection size of BU module does not match with that of the outdoor unit and

indoor units, it should prevail with the piping connection size of the outdoor unit and indoor units.

Braze the optional piping adapters to the BU module, so that the piping connection size of BU

module can match with that of the outdoor unit and indoor units.

1) Piping adapter(Standard accessories)