Hitachi RPC-1.5FSR Installations- Und Betriebshandbuch Seite 19

BEFORE OPERATION
Cooling operation
Heating operation
DB: Dry Bulb, WB: Wet Bulb (Temperature ºC)
*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 50 ºC). If the
water temperature is higher than 50 ºC, 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.
It may cause dew condensation of the indoor unit. (Ventilate
a room sufficiently too.)
• Attach a curtain or a blind to a window.
Direct sunlight is prevented and the cooling efficiency will be
increased.
• Do not use heating appliances during the cooling operation
as possible.
The cooling efficiency will be decreased. It may cause dew
4.2 EFFICIENT USE OF COOLING AND HEATING
1 Air flow direction: the appropriate air outlet angle is approx.
10º. If the cooling is not sufficient, change the air flow
direction.
Air outlet angle
1 Air flow volume: "MED" should be usually used. If the air
flow volume is set as "HIGH", the air flow will be spread
wider than "MED".
2 Temperature: the recommended set temperature is 26 to 28 ºC.
If the cooling is not sufficient, set the lower temperature.
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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 PMML0551 rev.4 - 07/2023 - A10762310A
Indoor
Outdoor
Indoor
Outdoor
COOLING
Louver angle
Maximum
30 DB
43 DB*
25 DB
15.5 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.
condensation and dropping dew.
• Use a circulator if warm air stays around ceiling.
The comfort will be increased. Contact your distributor for the
detail.
• Turn OFF the main power source 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
35º. If the heating is not sufficient, change the air flow
direction.
Air outlet angle
2 Air flow volume: "MED" should be usually used. If the air
flow volume is set as "HIGH", the air flow will be spread
wider than "MED".
2 Temperature: the recommended set temperature is 18 to 22 ºC.
If the heating is not sufficient, set the higher temperature.
Minimum
21.5 DB
-5 DB*
17 DB
-10 WB*
Louver angle