Piping Connection - Daikin VRV BSF4Q54TVJ Manuel D'installation

5-3 Piping connection

High/low pressure
gas pipe (*1)
Liquid pipe (*1)
Suction gas pipe (*1)
Reducers (*2)
(*1) Indicates field pipe.
(*2) Reducers may be required (field supplied or via separately sold optional Reducer kit
(KHFP26A200T)) if the field pipe size does not suit on the pipe size of the Branch Selector unit
(Table 5).
If there are branch ports left unused (not connected to indoor units)
• If there are unused branch ports, use the stopper pipe (Accessory (4)).
If there are many unused branch ports, be sure to use an optional Closed pipe kit (KHFP26A100C).
5-4 Airtightness test and vacuum drying
• After completing refrigerant piping work for the indoor units, Branch Selector unit, and outdoor unit,
conduct an airtightness test and vacuum drying.
For more information about the airtightness test pressure, refer to the outdoor unit's installation man-
ual.
English
In case of no Branch Selector
unit connected downstream
Branch Selector unit
Unit D Unit C Unit B Unit A
Gas pipe (*1)
Notes
In case of connecting with a 05-18 type indoor
unit, there is no need to cut and connect as it is.
In case of others, cut the outlet pipe and
connect to the connecting pipe in accordance
with the following instructions.
Connection area
Cutting point
(Center of
connection area)
In case of Branch Selector unit
connected in pass through
High/low pressure
gas pipe (*1)
Liquid pipe (*1)
or
Suction gas pipe (*1)
Stopper pipes
(Accessory (6))
Liquid pipe (*1)
Connect
Local pipe
Branch
Selector
unit
Reducers (*2)
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