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BEFORE OPERATION
Cooling operation
Heating operation
DB: Dry Bulb, WB: Wet Bulb (Temperature (ºC))
(*) Temperature and Humidity in Ceiling: DB: lower than 30ºC DB Relative Humidity: lower than 80%
(**)The temperature may change depending on the outdoor unit.
4 BEFORE OPERATION
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C A U T I O N
•
Supply electrical power to the system for approximately 12 hours
before start-up after long shutdown. Do not start the system
immediately after power supply, it may cause a compressor failure,
because the compressor is not heated well.
•
Make sure that the outdoor unit is not covered with snow or ice. If
covered, remove it by using hot water (approximately 50ºC). If the
water temperature is higher than 50ºC, it will cause damage to plastic
parts.
4.1 EFFICIENT USE OF INDOOR UNIT
•
Do not leave a window or a door open
The operating efficiency will be decreased, which may cause
dew condensation of the indoor unit. Also ventilate a room
sufficiently.
•
Hang a curtain or a blind on a window
Direct sunlight is prevented and the cooling efficiency will be
increased.
•
Do not use heating appliances during cooling operation
as much as possible
The cooling efficiency will be decreased, which may cause
dew condensation and dew drop.
4.2 EFFICIENT USE OF COOLING AND HEATING
1 Air Flow Direction: The appropriate air outlet angle is approx.
35º. If cooling is not sufficient, change the air flow direction.
35°
Air outlet angle (above center)
Air Outlet Angle (Above Center)
2 Air Flow Volume: "AUTO" should be usually used.
3 Temperature: The recommended set temperature is 27 to
29ºC. If cooling is not sufficient, lower the temperature setting.
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N O T E
About Multi-Split system
When the number of indoor unit or the operating mode is changed, the air outlet temperature may be changed and the indoor temperature is changed.
In this case, set as follows.
•
During cooling: lower slightly the temperature setting.
•
During heating: raise slightly the temperature setting.
3
PMML0549 rev.1 - 02/2021 - A10761230A
Indoor
Outdoor
Indoor
Outdoor
COOLING
35°
Louver
Louver
Angle
angle
Maximum
32 DB / 23 WB (*)
43 DB (**)
27 DB
15 WB (**)
•
When the system is started after a shutdown longer than approximately
3 months, it is recommended that the system be checked by your
service contractor.
•
Turn OFF the main switch when the system is stopped for a long
period of time. If the main switch is not turned OFF, electricity is
consumed, because the oil heater is always energized during
compressor stopping.
•
Use a circulator if warm air stays around the ceiling
The comfort will be increased. Contact your distributor for
details.
•
Change the air flow direction downward if the ceiling
surface gets dirty
It is recommended to change the air flow direction by
approx. 35º downward from the levelness.
•
Turn OFF the main power supply if the indoor unit is not
used for a long time
If not, the standby electricity charges will have to be paid
even if the indoor unit is unused.
HEATING
1 Air Flow Direction: The appropriate air outlet angle is approx.
60º. If heating is not sufficient, change the air flow direction.
60°
Air outlet angle (above center)
Air Outlet Angle (Above Center)
2 Air Flow Volume: "AUTO" should be usually used.
3 Temperature: The recommended set temperature is 18 to
20ºC. If heating is not sufficient, raise the temperature setting.
Minimum
21 DB / 15 WB (*)
-5 DB (**)
15 DB
-10 WB (**)
60°
Louver
Louver
Angle
angle
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