System Evacuation; System Evacuation And Purge - Trane TTK 509 E Installation Manual

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.
Flange Nut
Outdoor
Unit
Thread
Service hose for
Schrader-type valve
Figure 03 - Service Valve
SS-SVN03B-EN
System
Evacuation
3. The system should be evacuated until
the vacuum gauge shows a reading
of 350 microns (5.9 x 10
4. Close the vacuum pump valve, and
observe the vacuum gauge. If the
reading is more than 500 microns
(8.3 x 10
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
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.
Service
Valve
Obturator
Cap
Threaded
Cap
Obs: Notice that the position of suction and liquid lines is different for some models, refer to page 06 - fig. 02
-2 inHg).
-2 inHg) in an interval of one
-2
inHg) within
Electric
Connection
Suction Line
Liquid
Line
Figure 04 - Evacuation System
7. Replace the register and valve caps
to prevent leakages.
Table 02 - Additional refrigerant load
Tubing Sizes
Additional Load
Liquid - Suction
1/4" - 1/2" 26 g/m 17.5x10
1/4" - 5/8" 30 g/m 20.2x10
3/8" - 5/8" 59 g/m 39.6x10
3/8" - 3/4" 60 g/m 40.3x10
3/8" - 7/8" 62 g/m 41.7x10
3/8" - 1 1/8" 68 g/m 45.7x10
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.
Suction
Pressure
Liquid
Pressure
Vacuum
Pump
-3
lbs/ft
-3
lbs/ft
-3
lbs/ft
-3
lbs/ft
-3
lbs/ft
-3
lbs/ft
Electronic
Vacuum
Gauge
7