125
namely ordinary vacuum drying and special
vacuum drying.
1
Ordinary vacuum drying
When conduct first vacuum drying, connect
pressure gauge to the infusing mouth of
gas pipe and liquid pipe, and keep vacuum
pump running for 1hour (vacuum degree of
vacuum pump shall be reached
-755mmHg).
If the vacuum degree of vacuum pump
could not reach -755mmHg after 1 hour of
drying, it indicates that there is moisture or
leakage in pipeline system and need to go
on with drying for half an hour.
If the vacuum degree of vacuum pump still
could not reach -755mmHg after 1.5 hours
of drying, check whether there is leakage
source.
Leakage test: After the vacuum degree
reaches -755mmHg, stop vacuum drying
and keep the pressure for 1 hour. If the
indicator of vacuum gauge does not go up,
it is qualified. If going up, it indicates that
there is moisture or leak source.
2
Special vacuum drying
The special vacuum drying method shall be
adopted when:
Finding
moisture
during
flushing
refrigerant pipe.
Conducting construction on rainy day,
because rain water might penetrated into
pipeline.
Construction period is long, and rain
water might penetrated into pipeline.
Rain water might penetrate into pipeline
during construction.
Procedures of special vacuum drying are as
follows:
Vacuum drying for 1 hour.
Vacuum damage, filling nitrogen to reach
0.5Kgf/cm2 .
Because nitrogen is dry gas, vacuum
damage could achieve the effect of
vacuum drying, but this method could not
achieve drying thoroughly when there is
too much moisture. Therefore, special
attention shall be drawn to prevent the
entering of water and the formation of
condensate water.
Vacuum drying again for half an hour.
If the pressure reaches -755mmHg,start
to pressure leakage test. If it cannot reach
the value, repeat vacuum damage and
vacuum drying again for 1 hour.
Leakage test: After the vacuum degree
reaches -755mmHg, stop vacuum drying
and keep the pressure for 1 hour. If the
indicator of vacuum gauge does not go up,
it is qualified. If going up, it indicates that
there is moisture or leak source.
13.7 Additional refrigerant charge
After the vacuum drying process is carried
out, the additional refrigerant charge
process needs to be performed.
The outdoor unit is factory charged with
refrigerant. The additional refrigerant
charge volume is decided by the diameter
and length of the liquid pipe between indoor
and outdoor unit. Refer the following
formula to calculate the charge volume.
Diameter
of
liquid
pipe
(mm)
Φ6.35
Φ9.52
Formula
V=15g/m×(L-7.5) V=30g/m×(L-7.5)
V:
Additional refrigerant charge volume (g).
L:
The length of the liquid pipe (m).
Note:
Summary of Contents for KDIP012-H2
Page 8: ...5 2 2 Part names of Indoor Outdoor units Cassette Units ...
Page 9: ...6 KDIR Duct Units ...
Page 10: ...7 KDIP Duct Units ...
Page 11: ...9 Ceiling floor Units ...
Page 12: ...10 HESP DUCT Units ...
Page 19: ...19 2 3 4 7 Outside Water Pump for Optional When Ceiling Installation ...
Page 31: ...33 KSIE024 H220 O KSIR036 H218 inch 37 2 16 1 31 9 40 6 26 5 15 9 ...
Page 34: ...36 Ceiling floor Units ...
Page 39: ...41 KTIR036 H2G1 KTIR048 H2G1 ...
Page 40: ...43 KUIR18 H2 KUIR24 H2 ...
Page 41: ...44 KFUF036 H2G1 KFUF048 H2G1 ...
Page 42: ...45 KFUF060 H2G1 ...
Page 43: ...46 KFUF036 H2G1 KFUF048 H2G1 ...
Page 44: ...47 KDIP090 H2 KDIP012 H2 KDIP018 H2 KDIP24 H2 ...
Page 69: ...74 6 2 Outdoor Unit KSIE018 H220 O KSIE024 H220 O ...
Page 70: ...75 KSIE009 H221 O KSIE012 H220 O ...
Page 71: ...77 KSIR036 H218 ...
Page 77: ...83 KDIR09 H2 Code 0 Code 1 Code 2 Code 3 Code 4 ...
Page 78: ...84 KDIR12 H2 Code 0 Code 1 Code 2 Code 3 Code 4 ...
Page 79: ...85 KDIR18 H2 Code 0 Code 1 Code 2 Code 3 Code 4 ...
Page 80: ...86 KDIR24 H2 Code 0 Code 1 Code 2 Code 3 Code 4 ...
Page 96: ...104 12 Field Wiring 9K 24K 36K 48K 60K ...
Page 97: ...105 ...
Page 147: ...155 P U P V ...
Page 148: ...156 P W P N ...
Page 181: ...191 4 Remove the evaporator fixing clamps to disassemble the evaporator Fixing clamps 1 screw ...
Page 188: ...221 5 Remove the four fixing screws of the fan motor then remove the motor 5 ...