Daikin SV1A25AJV1B - Connecting the Refrigerant Piping; To Connect the Refrigerant Piping

15 | Piping installation
Installer and user reference guide
84
SV1A25AJV1B+SV4~8A14AJV1B
VRV 5 safety valve unit
4P749917-1 – 2023.09
15.3 Connecting the refrigerant piping
15.3.1 To connect the refrigerant piping
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c
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g
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a SV unit
b Liquid pipe (field supply)
c Gas pipe (field supply)
d Reducing joints and insulation tubes (accessory)
e Indoor unit connection set
f Liquid pipe (field supply)
g Gas pipe (field supply)
WARNING
Bent header or branch pipes can lead to refrigerant leakage. Possible consequence:
asphyxiation, suffocation and fire.
▪ NEVER bend the branch and header pipes sticking out of the unit. They have to
remain straight.
▪ ALWAYS support the branch and header pipes at a distance of 1m from the unit.
Prerequisite: Mount the indoor, outdoor and SV units.
Prerequisite: Read the instructions in the outdoor unit's manual for information on
how to install piping between the outdoor unit and the SV unit, selecting a
refrigerant branch kit, and installing piping between the refrigerant branch kit and
the SV units.
Prerequisite: Read the instructions in the indoor unit's manual for information on
how to install piping between the indoor unit and the SV unit.
Prerequisite: When connecting piping, respect the guidelines for pipe bending and
brazing.
1 Connect the header pipes to the appropriate field supply pipes. Use a
reducing joint (accessory) if the field supply pipe size does not match the
header pipe size of the SV unit. The diameters of the header pipes of the SV
unit are:
▪ Liquid pipe: 15.9mm
▪ Gas pipe: 22.2mm
2 If necessary, cut the branch pipes as indicated in the illustration below. The
diameters of the branch pipes of the SV unit are indicated in the illustration.