17
5-4. Connecting Tubing between Indoor and
Outdoor Units
a)
Tightly connect the indoor side refrigerant tubing extend-
ed from the wall with the outdoor side tubing. (Fig. 47)
b)
To fasten the flare nuts, apply specified torque as:
Table 5
5-5. Insulation of Refrigerant Tubing
To prevent heat loss and wet floors due to dripping of con-
densation, both tubes must be well insulated with a prop-
er insulation material. (Fig. 48) The thickness of the insula-
tion should be a minimum 5/16" (8 mm). (Fig. 49)
5-6. Taping the Tubes
a)
At this time, the 2 refrigerant tubes (and electrical wire if
local codes permit) should be taped together with armor-
ing tape. The drain hose may also be included and taped
together as 1 bundle with the tubing.
b)
Wrap the armoring tape from the bottom of the outdoor
unit to the top of the tubing where it enters the wall. As
you wrap the tubing, overlap half of each previous tape
turn. (Fig. 50)
c)
Clamp tubing bundle to wall, using 1 clamp approx. every
47 in. (120 cm).
Do not wind the armoring tape too tightly, since this will
decrease the heat insulation effect. Also, be sure the conden-
sation drain hose splits away from the bundle and drips clear
of the unit and the tubing.
5-7. Finishing the Installation
After finishing insulating and taping over the tubing, use seal-
ing putty to seal off the hole in the wall to prevent rain and
draft from entering. (Fig. 51)
NOTE
IMPORTANT
Tube Dia.
Tightening Torque
1/4" (6.35 mm)
Approx. 130 – 170 lbs.·in. (150 – 200 kg·cm)
3/8" (9.52 mm)
Approx. 300 – 340 lbs.·in. (350 – 400 kg·cm)
1/2" (12.7 mm)
Approx. 430 – 470 lbs.·in. (500 – 550 kg·cm)
5/8" (15.88 mm)
Approx. 520 – 560 lbs.·in. (600 – 650 kg·cm)
Indoor unit
Outdoor unit
Spanner
Torque wrench
Fig. 47
Insulation
Fig. 48
Insulation
Min.
5/16" (8 mm)
Thickness:
min. 5/16" (8 mm)
Fig. 49
Fig. 50
;;;;;;;
;;;;;;;
;;;;;
Clamp
Insulated tubes
Apply putty here
Tubing
Fig. 51
CAUTION
After a tube has been insulated,
never try to bend it into a narrow
curve, as this may cause the tube to
break or crack.
01-385 AirCon 12/11/01 4:42 PM Page 17
