Branch Pipes; Selection Procedure; Installation Work - Fujitsu AU*G36LRLA Design & Technical Manual

2-4.

BRANCH PIPES

SELECTION PROCEDURE

„ „
Type Kit name
UTP-SX236
Twin connection
UTP-SX254
Triple connection UTP-SX354
*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
unit.

INSTALLATION WORK

„ „
• 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)
(1) Check the direction of connection.
Twin connection type
Indoor unit
Outdoor unit
(2) When installing UTP-SX254
indoor unit.
Half union
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.
Model
Number
(Outdoor unit
of kits
connection)
□
1 36 model
45 model
□
1
54 model
□
1 54 model
□
, it is necessary to install the adapter on the half union at the liquid pipe of the indoor
Triple connection type ( Liquid )
Indoor unit
Outdoor unit
□
, install the adapter on the half union at the liquid pipe of the
to branch pipe
Adapter
Piping diameter
kit to outdoor unit
(Standard) *1
Ø 9.52 (Liquid)
Ø 15.88 (Gas)
Ø 9.52 (Liquid)
Ø 15.88 (Gas)
Ø 9.52 (Liquid)
Ø 15.88 (Gas)
CAUTION
Indoor unit
Indoor unit
Indoor unit
Outdoor unit
Adapter tightening torque
Adapter type Tightening torque [N•m] (kgf•cm)
Ø6.35 → Ø9.52
- (05-17) -
Piping diameter
of indoor
kit to indoor unit
Ø 6.35 (Liquid)
Ø 12.70 (Gas)
Ø 9.52 (Liquid) *2
Ø 15.88 (Gas)
Ø 6.35 (Liquid)
Ø 12.70 (Gas)
Triple connection type ( Gas )
Indoor unit
Indoor unit
Indoor unit
14 to 18 (140 to 180)
Number
units
2
2
3