Daikin VRV 5 RXYA8A7Y1B, Инструкция по установке и эксплуатации

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7 | Operation
Installer and user reference guide
31
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P749918-1 – 2023.12
Cooling Heating
Outdoor temperature –5~46°C DB –20~20°C DB
–20~15.5°C WB
Indoor temperature 21~32°C DB
14~25°C WB
15~27°C DB
Indoor humidity ≤80%
(a)
(a)
To avoid condensation and water dripping out of the unit. If the temperature or the
humidity is beyond these conditions, safety devices may be put in action and the air
conditioner may not operate.
Above operation range is only valid in case direct expansion indoor units are
connected to the VRV 5 system.
Special operation ranges are valid in case of using AHU. They can be found in the
installation/operation manual of the dedicated unit. Latest information can be
found in the technical engineering data.
7.3 Operating the system
7.3.1 About operating the system
▪ Operation procedure varies according to the combination of outdoor unit and
user interface.
▪ To protect the unit, turn on the main power switch 6 hours before operation.
▪ If the main power supply is turned off during operation, operation will restart
automatically after the power turns back on again.
7.3.2 About cooling, heating, fan only, and automatic operation
▪ Changeover cannot be made with a user interface whose display shows
"changeover under centralised control" (refer to installation and operation
manual of the user interface).
▪ When the display "changeover under centralised control" flashes, refer to
"7.6.1 About setting the master user interface" [
4
36].
▪ The fan may keep on running for about 1 minute after the heating operation
stops.
▪ The air flow rate may adjust itself depending on the room temperature or the fan
may stop immediately. This is not a malfunction.
7.3.3 About the heating operation
It may take longer to reach the set temperature for general heating operation than
for cooling operation.
The following operation is performed in order to prevent the heating capacity from
dropping or cold air from blowing.
Defrost operation
In heating operation, freezing of the outdoor unit's air cooled coil increases over
time, restricting the energy transfer to the outdoor unit's coil. Heating capability
decreases and the system needs to go into defrost operation to be able to remove