Specifications
ADPS
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Thermistor (inside unit)
Wide tubing
Dampened shopcloths
3-38. Installing the Refrigerant Tubing
The size of the refrigerant tubing is as shown in the
table below.
Table 3-8
● When brazing the wide tubing, cool the tubing with
dampened shopcloths as you work, as shown in
the figure at right, to protect the unit’s thermistor
from the heat generated by brazing.
● Be sure to insulate both the wide tubing and nar-
row tubing. In addition, wrap the supplied insulation
material around the tubing joints, and fasten in
place with vinyl tape or other means. Failure to
insulate the tubing may result in water leakage
from condensation.
● Plug all gaps at tube through-holes in the unit with
insulation or a similar substance to prevent air
leakage.
● When connecting an embedded ceiling type unit
(like this one) to a refrigerant system where individ-
ual operation is possible, install 2 RAP valve kits
(EEV22-28) in parallel. (For details on connecting
the RAP valve kit, refer to the manual that came
with the kit.)
224 Type 280 Type
Wide tube (mm) φ19.05 (Brazing connection) φ22.22 (Brazing connection)
Narrow tube (mm)
φ9.52 (Flare connection) φ9.52 (Flare connection)
Fig. 3-118
04-396 InverterW_p51-108 ARGO 12/21/04 10:17 AM Page 70