Operation Manual

EVACUATION OF THE REFRIGERATION TUBES AND THE
INDOOR UNIT
After connecting the unions of the indoor and outdoor units,
evacuate the air from the tubes and indoor unit as follows:
1. Connect the charging hoses with a push pin to the low and
high sides of the charging set and the service ports of the
suction and liquid valves.
Be sure to connect the end of the charging hose with the
push pin to the service ports.
2. Connect the center hose of the charging set to a vacuum
pump.
3. Open Fully the low and high pressure sides of the manifold
gauge valves.
4. Turn on the vacuum pump. Perform evacuating for at least
30 minutes and than confirm that the needle in the gauge
moves from 0 MPa (0cm Hg) to -0.1 MPa (-76cm Hg).
5. Close the valves of the low and high sides of the charging
set and turn off the vacuum pump. After few minutes, if the
gauge needle has moved, there is a leak which must be
found and repaired before moving to the next stage.
6. Disconnect the charging hose from the vacuum pump and
from the service ports of the suction and liquid valves.
7. Tighten the service port caps of suction and liquid valves.
8. Remove the valve caps from all valves, and open them
using a hexagonal Allen wrench.
9. Securely tighten the caps onto all of the valves.
10. Check for gas leaks from all the connecting position. Test
with electronic leak detector or with a sponge immersed in
soapy water for bubbles.
1
2
3
1
2
3
Fig 9
Fig 10
Fig 11
Tightening
torques of unions
and valve caps:
TUBE SIZE
Liquid line 1/4"
Suction line 3/8"
Suction line 1/2"
Suction line 5/8"
TORQUE
15-20 N.M.
30-35 N.M.
50-54 N.M.
75-78 N.M.
Fig.9
1.Wrench
2.Torque wrench
3 Union.
Fig.10
To prevent refrigerant
leakage, coat the flared
surface with
refrigeration oil
Fig.11
1.Suction valve
2.Service port
3.Liquid 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
Fig.12
1. Charging set
2. Vacuum pump
3. OUTDOOR UNIT
4. Service valve
Fig 12
4
CONNECT THE INDOOR TO THE OUTDOOR UNIT
The indoor unit contains a small quantity of nitrogen. Do
not unscrew the nuts from the unit until you are ready to
connect the tubing. The outdoor unit is supplied with
sufficient refrigerant charge (R410A). Refer to outdoor unit
nameplate.
To prevent crushing, bend tubes using a bending tool.
REFRIGERANT TUBING
NOTE: Use refrigeration type copper tubing only.
2. Use tubing diameter that corresponds to the tubing
diameter of the indoor and outdoor units. Note that the
liquid and suction tubes have different diameters. (See
tube size, torque tightening table.)
3. Place flares nuts on tube ends before preparing them
with a flaring tool. Use the flare nuts that are mounted
on the supplied outdoor and indoor units.
4. Connect the all ends of the tubing to the indoor and
outdoor units.
5. Insulate each tube separately, and their unions, with at
least 6 mm thick of insulation. Wrap the refrigerant
tubing, drain hose and electric cables together with a
vinyl tape (UV protected).
R410A
1. Open the valve cover.
Notice the sign. All ends should
correspond one by one.
Caution!
When unscrewing the
valve caps, do not
stand in front of them or
the spindles at any time,
as the system is under
pressure.
Fig.8
1.INDOOR UNIT
2.Liquid tube (small dia.)
3.Suction tube (large dia.)
4.Plugs
5.Flare nuts
6.Tubing between units
7.Suction tube
8.Liquid tube
9.OUTDOOR UNIT
10.Flare nuts
11.Suction valve (larger)
12.Liquid valve (small)
Fig 8
NOTE: 1. For trio unit use connections
A,BandD
2. For large indoor unit of 5.0KW
Use the lower connection (unit D)