Connecting Tubing Between Indoor And Outdoor Units; Insulation Of Refrigerant Tubing - Sanyo XHS1271 Technical & Service Manual

5-4. Connecting Tubing between Indoor and
Outdoor Units
a) Tightly connect the indoor side refrigerant tubing exten-
ded from the wall with the outdoor side tubing. (Fig. 21)
b) To fasten the flare nuts, apply specified torque as:
Table 5
Tube Dia.
1/4" (6.35 mm) Approx. 120 – 160 lbs·in (140 – 180 kgf·cm)
3/8" (9.52 mm) Approx. 300 – 360 lbs·in (340 – 420 kgf·cm)
1/2" (12.70 mm) Approx. 430 – 540 lbs·in (490 – 610 kgf·cm)
5/8" (15.88 mm) Approx. 590 – 710 lbs·in (680 – 820 kgf·cm)

5-5. Insulation of Refrigerant Tubing

IMPORTANT
To prevent heat loss and wet floors due to dripping of con-
densation, both tubes must be well insulated with a
proper insulation material.
The thickness of the insulation should be a minimum 5/16"
(8 mm). (Fig. 22)
Taping the flare nuts
Wind the insulation tape around the flare nuts at the
tube connections. Secondly cover up the tubing connec-
tions with the flare insulation (1/8" (T3, supplied)). Then
wind the other flare insulation (3/16" (T5, supplied)).
Finally, fasten the insulation at both ends with the sup-
plied vinyl ties. (Fig. 23)
Insulation material
The material used for insulation must have good insula-
tion characteristics, be easy to use, be age resistant,
and must not easily absorb moisture.
After a tube has been insulat-
CAUTION
ed, never try to bend it into a
narrow curve because it can
cause the tube to break or
crack.
Tightening Torque
Torque wrench
Indoor unit
Min.
5/16"
(8 mm)
Insulation tape (supplied)
Flare nut
Vinyl tie (supplied)
Drain hose insulation
and vinyl tie
(supplied)
Drain hose
and hose band
(supplied)
Never grasp the drain or refrigerant connecting out-
lets when moving the unit.
16
Spanner
Outdoor unit
Fig. 21
Insulation
Thickness:
min. 5/16"
(8 mm)
Fig. 22
Flare insulation (3/16"(T5, supplied) )
Flare insulation (1/8"(T3, supplied) )
Tube insulation
(not supplied)
Fig. 23
Drain pipe and insulation Refrigerant tubing
(not supplied) and insulation
(not supplied)
Insulation tape
Vinyl tie (supplied)
Flare
insulation
The procedure used for installing
the insulation for both wide and
narrow tubes are the same.
Fig. 24