SS-SVN03B-EN
7
System Evacuation and Purge
1. The outdoor unit is supplied with
refrigerant pre-loaded in factory . The
load indicated on the nameplate is
the total amount required by a system
with a refrigerant line lenght of up to
7.5 meters (295.3”). Considering that
the outdoor unit does not require
evacuation, except in cases of
refrigerant leakage, the suction and
liquid valves should remain closed.
2. After installation is finished, apply
vacuum in refrigerant lines and indoor
unit.
3. The system should be evacuated until
the vacuum gauge shows a reading
of 350 microns (5.9 x 10
-2
inHg).
4. Close the vacuum pump valve, and
observe the vacuum gauge. If the
reading is more than 500 microns
(8.3 x 10
-2
inHg) in an interval of one
minute, the evacuation is not
complete, or there is a system
leakage.
5. If the vaccum gauge does not pass
500 microns (8.3 x 10
-2
inHg) within
the interval of one minute, the vaccum
is finished.
6. With the vacuum pump off and the
manifold closed, open the service
valves in the liquid and suction lines.
System
Evacuation
7. Replace the register and valve caps
to prevent leakages.
Table 02 - Additional refrigerant load
The refrigerant load will have to be
completed when the distance between
internal and external units is more than
7.5 meters (295.3”). Use table 2 for
recommended additional loads.
Obturator
Cap
Service
Valve
Flange Nut
Thread
Threaded
Cap
Service hose for
Schrader-type valve
Outdoor
Unit
Suction
Pressure
Liquid
Pressure
Electronic
Vacuum
Gauge
Vacuum
Pump
Suction Line
Liquid
Line
Electric
Connection
Figure 03 - Service Valve
Figure 04 - Evacuation System
Obs: Notice that the position of suction and liquid lines is different for some models, refer to page 06 - fig. 02
Tubing Sizes
Liquid - Suction
1/4" - 1/2"
26 g/m
17.5x10
-3
lbs/ft
1/4" - 5/8"
30 g/m
20.2x10
-3
lbs/ft
3/8" - 5/8"
59 g/m
39.6x10
-3
lbs/ft
3/8" - 3/4"
60 g/m
40.3x10
-3
lbs/ft
3/8" - 7/8"
62 g/m
41.7x10
-3
lbs/ft
3/8" - 1 1/8"
68 g/m
45.7x10
-3
lbs/ft
Additional Load