3-4. Branch pipes
¢
Branch pipe selection
Twin connection Triple connection Double twin connection
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
1st branch
1st branch
2nd branch
1st branch
Connection
type
Kit name
Number of
kits
Outdoor unit
Piping diameter Number of
indoor
unit
Place of use
(branch)
Kit to outdoor unit *
1
Kit to indoor unit
Twin UTP-SX272A 1
AOYG72LRLA Liquid: 12.70 (1/2)
Gas: 25.40 (1)
Liquid: 9.52 (3/8)
Gas: 15.88 (5/8)
2 1st
AOYG90LRLA
Triple UTP-SX372A 1
AOYG72LRLA
Liquid: 12.70 (1/2)
Gas: 25.40 (1)
Liquid: 9.52 (3/8)*
2
Gas: 15.88 (5/8)
3 1st
AOYG90LRLA
Liquid: 12.70 (1/2)
Gas: 25.40 (1)
Liquid: 9.52 (3/8)
Gas: 15.88 (5/8)
Double twin
UTP-SX272A 1
AOYG72LRLA
Liquid: 12.70 (1/2)
Gas: 25.40 (1)
Liquid: 9.52 (3/8)
Gas: 15.88 (5/8)
4
1st
UTP-SX236A 2
Liquid: 9.52 (3/8)
Gas: 15.88 (5/8)
Liquid: 6.35 (1/4)
Gas: 12.70 (1/2)
2nd
UTP-SX272A 1
AOYG90LRLA
Liquid: 12.70 (1/2)
Gas: 25.40 (1)
Liquid: 9.52 (3/8)
Gas: 15.88 (5/8)
4
1st
UTP-SX254A 2
Liquid: 9.52 (3/8)
Gas: 15.88 (5/8)
Liquid: 9.52 (3/8)*
2
Gas: 15.88 (5/8)
2nd
*1: For the diameter of the connection piping between the outdoor unit and the branch pipes, refer to
the installation manual of the outdoor unit.
*2: It is necessary to attach the adapter (accessory) to the half union of the liquid pipe of the indoor
unit.
Half union
To branch pipe
Adapter
indoor unit
(Liquid pipe)
NOTES:
• When using the adapter (accessory), be careful not to overtighten the nut, or the smaller pipe
may be damaged.
Adapter type Tightening torque (N•m [kgf•cm])
6.35 → 9.52 14 to 18 (140 to 180)
• Use appropriate wrenches to avoid damaging the connection thread by overtightening the flare
nut.
• Apply wrenches on both the flare nut (locally purchased), and adapter to tighten them.
- 202 -
3-4. Branch pipes 3. Pipe installation
SYSTEM
DESIGN
SYSTEM
DESIGN
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