Daikin VRV IV User Manual

8 | Operation
Installer and user reference guide
26
RXMLQ8 + RXYLQ10~14T7Y1B*
VRV IV system air conditioner
4P543427-1A – 2020.10
8 Operation
In this chapter
8.1 Operation range...................................................................................................................................................................... 26
8.2 Operating the system ............................................................................................................................................................. 26
8.2.1 About operating the system .................................................................................................................................. 26
8.2.2 About cooling, heating, fan only, and automatic operation ................................................................................. 27
8.2.3 About the heating operation ................................................................................................................................. 27
8.2.4 To operate the system (WITHOUT cool/heat changeover remote control switch) ............................................. 27
8.2.5 To operate the system (WITH cool/heat changeover remote control switch)..................................................... 28
8.3 Using the dry program............................................................................................................................................................ 29
8.3.1 About the dry program .......................................................................................................................................... 29
8.3.2 To use the dry program (WITHOUT cool/heat changeover remote control switch)............................................ 29
8.3.3 To use the dry program (WITH cool/heat changeover remote control switch) ................................................... 29
8.4 Adjusting the air flow direction.............................................................................................................................................. 30
8.4.1 About the air flow flap ........................................................................................................................................... 30
8.5 Setting the master user interface .......................................................................................................................................... 31
8.5.1 About setting the master user interface ............................................................................................................... 31
8.5.2 To designate the master user interface (VRV DX and Hydrobox) ......................................................................... 31
8.6 About control systems............................................................................................................................................................ 32
8.1 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
–25~15.5°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.
8.2 Operating the system
8.2.1 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.

Daikin VRV IV Specifications

General

Type	Variable Refrigerant Volume (VRV)
Series	VRV IV
Refrigerant	R410A
Energy Efficiency	High
Operating Temperature Range (Cooling)	-5°C to 46°C
Operating Temperature Range (Heating)	-20°C to 15.5°C
Installation	Professional installation required
Control	Centralized control system
Indoor Unit Options	Various types including ceiling cassette, wall-mounted, ducted, and floor-standing
Power Supply	380-415V, 3-phase, 50Hz