LG GVH282PAB Manual page 9

LG Electronics
※ This guide contains many important safety messages. Always read and obey all safety messages.
You can be killed or seriously injured if you don't follow instructions.
3.2 Application Limit
Refrigerant Charge Limit
Liquid Refrigerant Back
Δ T : Temp. Difference
Pressure Difference
in Operating
ON/OFF Operation
Pressure Difference
at Starting
Tilt in Operation
System Accumulator
Protecting Reverse
Operation
GVH282PAB
Max 2,500g
(Charge limit depends on
System should be designed not to allow the liquid to go back to
compressor which cause knocking noise , current increase or
undesirable vibration and make short compressor life time.
Δ T = Case Bottom Temp.－ Condensing Temp.
It must be kept Δ T ≥ 5℃
The Pressure difference in operating shall be 5.0㎏f/㎠ or more,
but 3 minutes starting excluded.
Each cycle should be at least 6 minutes
(ON Time : at least 3 minute , OFF Time : at least 3 minutes) (ON Time : at least 3 minute , OFF Time : at least 3 minutes)
When starting, discharge pressure is balanced with suction pressure.
( Pd – Ps ≤ 0.5 ㎏f/㎠ )
The allowable tilt of the compressor in operation shall be 5˚ or less.
The Accumulator volume should be enough to cover 50% of
maximum system refrigerant volume.
Ratio coefficient 'K' should be over 0.6(heating system) or 0.4(cooling
system)
Effective Volume of Accum. × Specific gravity of Refrigerant
K = --------------------------------------------------------------------------
※ Effective Volume of Accumulator = 580 ㎤
※ Specific Gravity of Refrigerant (R410A) = 1.085 g/㎤ ( at 20℃ )
If coefficient "K" does not meet recommendation, refrigerant system
must check liquid back phenomenon at accumulator.
The compressor must be operated by proper voltage in accordance
with the frequency without reverse revolution condition. The reverse
revolution condition can be avoided by just keeping right order of
phase supplied power source.
Page 9 / 24
LGETH -180704-054 / Rev. 0
Oil Dilution Rate** note 2
Charged Weight of Refrigerant
& accumulator 'K'
)