Operation Manual
PIPES CONNECTION
AND FLARRING THE PIPES
PIPE INSULATION
PIPES CONNECTIONS TO THE UNIT
EVACUATION OF PIPES AND INDOOR UNIT
Please use the pipe cutter for cutting the pipes.1.
Remove all burrs by using reamer. Gas leakage might 2.
happen If burrs are not removed! Turn pipes edge
down to avoid metal powder from entering down the
pipes.
After inserting the flare nut into the cooper pipes, 3.
please make a flare.
0.0-0.5mm
Bar
Coppet pipe
Coppet pipe
Reamer
To cut
Inclined
Surface
damaged
Cracked
Uneven
thickness
Please carry out insulation at pipe connection portion 1.
as mentioned in Indoor/ Outdoor Unit Installation
Diagram. Please wrap the insulated piping end to
prevent water from going inside the piping.
If drain hose or connecting pipes is in the room (where 2.
dew may form). Please increase the insulation by using
POLY-E FOAM with thickness of 9 mm or more.
Vinyl tape
Connecting to the indoor unit
Align the center of the pipes and finger tight the flare 1.
nut.
Use the torque wranch to tighten the nut firmely.2.
Connecting to the outdoor unit
Align the center of the pipes to the valves.1.
Use the torque wranch to tighten the valves firmely 2.
according to table:
Flare Nuts
Valve Cap
Service Port Cap
1/4
13-18
13-20
11-13
TUBE (Inch)
Torque(
N.m
)
3/8
40-45
13-20
11-13
1/2
60-65
18-25
11-13
5/8
70-75
18-25
11-13
3/4
80-85
40-50
11-13
After connection the unions of the indoor and outdoor units,
evacuate the air from the tubes and from the indoor unit is
follow:
Connect the charging hoses with a push pin to the low and high 1.
sides of the charging set and the service port of the suction and
liquid valves. Be sure to connect the end of the charging hose
with the push pin to the service port.
Connect the center hose of the charging set to a vacuum pump.2.
Turn on the power switch of the vacuum pump and make sure 3.
that the needle in the gauge moves from 0MPa (0cm Hg) to - 0.1
MPa (-76cm Hg). Let the pump run for fifteen minutes.
Close the valves of both the low and high sides of the charging 4.
set and turn off the vacuum pump. Note that the needle in the
gauge should not move after approximattely five minutes.
Disconnect the charging hose from the vacuum pump and from 5.
the service ports of the suction and liquid valves.
Tighten the service port caps from both valves, and open them 6.
using a hexagonal Allen wrench.
Remove the valve caps from both valves, and open them using 7.
a hexagonal Allen wrench.
Remount valve caps onto both of the valves.8.
Check for gas leaks from the four unions and from the valve caps. 9.
Test with electronic leak detector or with a sponge immersed in
soapy water for bubbles.
1. Charging set
2. Vacuum pump
3. OUTDOOR UNIT
4. Service valve
5. Cap
6. Suction valve
7. Service valve*
8. Cap
9. Liquid valve
10. INDOOR UNIT
11. Suction flare connection
12. Liquid flare connection
1
2
3
4
5
6
7
8
9
10
11 12
NOTE: For additional charge of various tubing
lengths, refer to outdoor unit table.
Sample
8
CUTTING