Operation Range; Operating The System; About Operating The System - Daikin VRV IV+ RYYQ8U7Y1B Series Installer And User Manual

7 | Operation

7.2 Operation range

7.3 Operating the system

7.3.1 About operating the system

Installer and user reference guide
26
CAUTION
Do NOT operate the system when using a room fumigation-type insecticide.
Chemicals could collect in the unit, and endanger the health of people who are
hypersensitive to chemicals.
NOTICE
Be sure to turn ON the power 6 hours before operation in order to have power
running to the crankcase heater and to protect the compressor.
This operation manual is for the following systems with standard control. Before
initiating operation, contact your dealer for the operation that corresponds to your
system type and mark. If your installation has a customised control system, ask
your dealer for the operation that corresponds to your system.
Operation modes (depending on indoor unit type):
▪ Heating and cooling (air to air).
▪ Fan only operation (air to air).
▪ Heating and cooling (air to water).
Dedicated functions exist depending on the type of indoor unit, refer to dedicated
installation/operation manual for more information.
Use the system in the following temperature and humidity ranges for safe and
effective operation.
Outdoor temperature
Indoor temperature
Indoor humidity
(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.
▪ 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.
Cooling
–5~43°C DB
21~32°C DB
14~25°C WB
(a)
≤80%
Heating
–20~21°C DB
–20~15.5°C WB
15~27°C DB
RYYQ+RYMQ+RXYQ
VRV IV+ heat pump
4P546228-1C – 2021.11