Daikin VRV IV+, Инструкция для установки и пользователя

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16 | Operation
Installer and user reference guide
141
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
16 Operation
16.1 Operation range
Use the system in the following temperature and humidity ranges for safe and
effective operation.
Cooling Heating
Outdoor temperature –5~43°C DB –20~21°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 IV system.
Special operation ranges are valid in case of using Hydrobox units or AHU. They can
be found in the installation/operation manual of the dedicated unit. Latest
information can be found in the technical engineering data.
16.2 Operating the system
16.2.1 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.
16.2.2 About cooling, heating, fan only, and automatic operation
▪ Changeover cannot be made with a user interface whose display shows
"change-over under centralised control" (refer to installation and operation
manual of the user interface).
▪ When the display "change-over under centralised control" flashes, refer to
"16.5.1 About setting the master user interface" [
4
146].
▪ 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.
16.2.3 About the heating operation
It may take longer to reach the set temperature for general heating operation than
for cooling operation.