Fujitsu AB*G18LVTB Series, Design & Technical Manual

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BRANCH PIPES 2-4.
SELECTION PROCEDURE
„ „
Type Kit name
Number
of kits
Model
(Outdoor unit
connection)
Piping diameter
kit to outdoor unit
(Standard) *1
Piping diameter
kit to indoor unit
Number
of indoor
units
Twin connection
UTP-SX236
□
1 36 model
Ø 9.52 (Liquid)
Ø 15.88 (Gas)
Ø 6.35 (Liquid)
Ø 12.70 (Gas)
2
UTP-SX254
□
1
45 model
54 model
Ø 9.52 (Liquid)
Ø 15.88 (Gas)
Ø 9.52 (Liquid) *2
Ø 15.88 (Gas)
2
Triple connection UTP-SX354
□
1 54 model
Ø 9.52 (Liquid)
Ø 15.88 (Gas)
Ø 6.35 (Liquid)
Ø 12.70 (Gas)
3
*1: For the diameter of the connection piping between the outdoor unit and the branch pipes, please refer to the
Installation Manual of the outdoor unit.
*2: When installing UTP-SX254
□
, it is necessary to install the adapter on the half union at the liquid pipe of the indoor
unit.
INSTALLATION WORK
„ „
CAUTION
Do not mistake the direction of connection. •
Set the piping from the branch pipe to the indoor units to be of the same length. •
(Max. difference: 8m)
Shorten the length of the piping after branching as much as possible. (Max. length: 20m)
•
Check the direction of connection. (1)
Twin connection type Triple connection type ( Liquid ) Triple connection type ( Gas )
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Outdoor unit
Outdoor unit
Indoor unit
Indoor unit
Outdoor unit
When installing UTP-SX254 (2)
□
, install the adapter on the half union at the liquid pipe of the
indoor unit.
Half union
to branch pipe
Adapter
indoor unit
(Liquid pipe)
• When using the Adapter, be careful not to overtighten the nut, or the smaller pipe may be damaged.
• Use appropriate wrenches to avoid damaging the connection thread by overtightening the flare nut.
• Apply wrenches on both of flare nut (local part), and Adapter to tighten them.
Adapter tightening torque
Adapter type Tightening torque [N•m] (kgf•cm)
Ø6.35 → Ø9.52 14 to 18 (140 to 180)