Hitachi RPC-2.0FSR - Page 19

Maximum Minimum
Cooling operation
Indoor 30 DB 21.5 DB
Outdoor 43 DB* -5 DB*
Heating operation
Indoor 25 DB 17 DB
Outdoor 15.5 WB* -10 WB*
DB: Dry Bulb, WB: Wet Bulb (Temperature ºC)
*The temperature may change depending on the outdoor unit.
4 BEFORE OPERATION
! CAUTION
• 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.
• 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.
4.1 EFFICIENT USE OF INDOOR UNIT
• Do not leave a window or a door open.
The operating e󰀩ciency will be decreased.
It may cause dew condensation of the indoor unit. (Ventilate
a room su󰀩ciently too.)
• Attach a curtain or a blind to a window.
Direct sunlight is prevented and the cooling e󰀩ciency will be
increased.
• Do not use heating appliances during the cooling operation
as possible.
The cooling e󰀩ciency will be decreased. It may cause dew
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.
4.2 EFFICIENT USE OF COOLING AND HEATING
COOLING HEATING
1 Air ow direction: the appropriate air outlet angle is approx.
10º. If the cooling is not su󰀩cient, change the air ow
direction.
Louver angle
Air outlet angle
1 Air ow volume: ”MED” should be usually used. If the air
ow volume is set as “HIGH”, the air ow will be spread
wider than “MED”.
2 Temperature: the recommended set temperature is 26 to 28 ºC.
If the cooling is not su󰀩cient, set the lower temperature.
1 Air ow direction: the appropriate air outlet angle is approx
35º. If the heating is not su󰀩cient, change the air ow
direction.
Louver angle
Air outlet angle
2 Air ow volume: ”MED” should be usually used. If the air
ow volume is set as “HIGH”, the air ow will be spread
wider than “MED”.
2 Temperature: the recommended set temperature is 18 to 22 ºC.
If the heating is not su󰀩cient, set the higher temperature.
? NOTE
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.
BEFORE OPERATION
PMML0551 rev.4 - 07/2023 - A10762310A
3
EN