LRYEQ16A7Y1
CONVENI-PACK
4P448939-1A – 2016.07
Installation manual
12
7. Expansion Valve Selection
This model has a larger degree of subcooling (subcooling ratio= condensing temperature - liquid refrigerant temperature at outdoor unit outlet) for
the liquid refrigerant of a refrigerator than that of refrigerators without a subcooling mechanism as it cools the liquid refrigerant with a plate type heat
exchanger.
When selecting an expansion valve for the load, select one based on the subcooling ratio for the liquid refrigerant in the following table.
• Calculated example: The subcooling ratio with evaporative temperature at –10°C and condensing temperature at 45°C is equal to 19K (liquid
refrigerant temperature at 26°C).
The liquid temperature in the booster unit is further decreased.
The liquid temperature of the refrigeration showcase inlet is approximately +10 degrees of the target evaporating temperature of the outdoor unit.
8. FIELD WIRING
To Electric Engineering Contractors
• Be sure to install an earth leakage breaker. The product incorpo-
rates inverter equipment. In order to prevent the malfunctioning of
the earth leakage breaker, make sure that the earth leakage
breaker withstands harmonic interference.
• Do not operate the CONVENI-PACK until refrigerant piping work is
completed, or otherwise the compressor will malfunction.
• Do not remove any electrical components such as thermistors or
sensors when connecting power supply wires or transmission
wires. The compressor may malfunction if the CONVENI-PACK is
operated with such electrical components removed.
• All field wiring and components must be installed by a licensed
electrician and must comply with relevant local and national regu-
lations.
• Be sure to use a dedicated power circuit. Never use a power supply
shared by another appliance.
• Never install a phase advancing capacitor. As this unit is equipped
with an inverter, installing a phase advancing capacitor will not only
deteriorate power factor improvement effect, but also may cause
capacitor abnormal heating accident due to high-frequency waves.
• Only proceed with wiring work after blocking off all power.
• Always ground wires in accordance with relevant local and national
regulations.
• This machine includes an inverter device. Connect earth and leave
charge to eliminate the impact on other devices by reducing noise
generated from the inverter device and to prevent leaked current
from being charged in the outer hull of the product.
• Do not connect the ground wire to gas pipes, sewage pipes, light-
ning rods, or telephone ground wires.
Gas pipes: can explode or catch fire if there is a gas leak.
Sewage pipes: no grounding effect is possible if hard plastic pip-
ing is used.
Telephone ground wires and lightning rods: dangerous when
struck by lightning due to abnormal rise in electrical potential in the
grounding.
• Be sure to install an earth leakage circuit breaker.
This unit uses an inverter, so install the earth leakage circuit
breaker that be capable of handling high harmonics in order to pre-
vent malfunctioning of the earth leakage circuit breaker itself.
• Earth leakage circuit breaker which are especially for protecting
ground-faults should be used in conjunction with main switch or
fuse for use with wiring.
• Electrical wiring must be done in accordance with the wiring dia-
grams and the description herein.
• Do not operate until refrigerant piping work is completed.
(If operated before complete the piping work, the compressor may
be broken down.)
• Never remove thermistor, sensor or etc. when connecting power
wiring and transmission wiring.
(If operated with thermistor, sensor or etc. removed, the compres-
sor may be broken down.)
• This product have reversed phase protection detector that only
works when the power is turned on. If there exists black out or the
power goes on and off which the product is operating, attach a
reversed phase protection circuit. Running the product in reversed
phase may break the compressor and other parts.
• Attach the power wire securely. Introducing power with a missing
N-phase or with a mistaken N-phase will break the unit.
• Never connect the power supply in reversed phase.
The unit can not operate normally in reversed phase.
If you connect in reversed phase, replace two of the three phases.
• Make sure the electrical unbalance ratio is no greater than 2%. If it
is larger than this, the unit’s lifespan will be reduced.
If the ratio exceeds 4%, the unit will shut down and an malfunction
code will be displayed on the indoor remote controller.
• Connect the wire securely using designated wire and fix it with
attached clamp without applying external pressure on the terminal
parts (terminal for power wiring, terminal for transmission wiring
and earth terminal).
• Install a switch that allows you to switch all poles from the main
power supply.
Subcooling ratio (K) (subcooling ratio = condensing temperature - liquid refrigerant temperature)
Condensing
temperature
Evaporative
temperature
-45°C -40°C -35°C -30°C -25°C -20°C -15°C -10°C -5°C -0°C 5°C 10°C
20°C 31K 28K 26K 23K 20K 18K 15K 13K 11K 9K 6K 4K
25°C 31K 29K 26K 24K 21K 19K 16K 14K 12K 10K 8K 6K
30°C 32K 29K 27 24K 22K 19K 17K 15K 13K 11K 9K 7K
35°C 32K 30K 27K 25K 23K 20K 18K 16K 14K 12K 10K 9K
40°C 32K 30K 28K 26K 23K 21K 19K 17K 16K 14K 13K 10K
45°C 33K 31K 29K 26K 24K 22K 21K 19K 17K 15K 14K 12K
50°C 34K 31K 29K 27K 25K 24K 22K 20K 18K 17K 15K 14K
55°C 34K 32K 30K 28K 27K 25K 23K 22K 20K 18K 17K 16K
4PEN448939-1A.book Page 12 Monday, September 5, 2016 7:12 PM
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