14
EN
H
Tighten connections using a spanner and a torque
wrench; apply specified torque (see table).
J
Air purging of internal unit and refrigerant tubes.
Connect the vacuum pump to the outside unit
as shown in the figure. Air and moisture have
undesiderable effects on the refrigerant system.
K
Connect the indoor units using, if required, the
adapter on the low pressure valves. Remove
caps from service valves of both tubes. Then start
vacuum pump and let it run for the time indicated
in the table (vacuum 10 mm Hg abs.).
G
A good flare has the following characteristics:
- inside surface is glossy and smooth
- edge is smooth
- tapered sides are of uniform length.
Apply refrigerant lubricant to the matching surface
of the flare and union before connecting them
together.
Lubricate
-3 mm
45°
TUBE DIA.
6,35 mm (1/4”) Approx. 150 – 200 kgcm (15 - 20 Nm)
9,52 mm (3/8”) Approx. 350 – 400 kgcm (30 - 40 Nm)
12,7 mm (1/2”) Approx. 500 – 550 kgcm (50 - 55 Nm)
TIGHTENING TORQUE
I
Insulate tubes leaving connections uncovered for
leak test.
VACUUM PUMP CAPACITY
100 /h
Tubing length: Tubing length
less than 10 m longer than 10 m
10 min. or more 15 min. or more
Low pressure
High pressure
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