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Operation
Installer and user reference guide
26
R R8T7V1B
VRV IV heat pump for indoor installation
4P499898-1B – 2021.12
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).
Dedicated functions exist depending on the type of indoor unit, refer to dedicated
installation/operation manual for more information.
7.2 Operation range
Use the system in the following temperature and humidity ranges for safe and
effective operation.
Specification
5 HP
8 HP
Maximum capacity
Heating
16.0 kW
25.0 kW
Cooling
14.0 kW
22.4 kW
Outside ambient design
temperature
Heating
–20~15.5°C WB
Cooling
–5~46°C DB
Ambient design temperature of compressor unit
and heat exchanger unit
5~35°C DB
Maximum relative
humidity around the
compressor unit and heat
exchanger unit
Heating
50%
(a)
Cooling
80%
(a)
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 compressor unit,
heat exchanger 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.
▪
When stopping the unit, the unit might still operate for a few minutes. This is not
a malfunction.
