HXY48TAVJU
VRV System indoor unit
3P616151-1A – 2021.12
Installation and operation manual
21
Note that the Lo_Ti value should be higher than Hi_Ti, as for colder
outdoor temperatures (i.e. Lo_A) warmer water is required.
[3-03]
Set point at high ambient temperature (Hi_Ti): the target
outgoing water temperature when the outdoor temperature
equals or rises above the high ambient temperature (Hi_A).
Note that the Hi_Ti value should be lower than Lo_Ti, as for
warmer outdoor temperatures (i.e. Hi_A) less warm water
suffices.
[4] Settings are not applicable
[5] Automatic setback
[5-00]
Setting is not applicable.
[5-01]
Setting is not applicable.
[5-02]
Leaving water setback temperature.
[5-03]
Room setback temperature.
[5-04]
Setting is not applicable.
[8] Option setup
[8-00]
User interface temperature control.
[8-00]
=0 the unit operates in leaving water temperature
control. This is the default setting.
[8-00]
=1 the unit operates in room temperature control. This
means that the user interface is used as room thermostat, so
the user interface can be placed in the living room to control
the room temperature.
[8-01]
Setting is not applicable.
[8-02]
Setting is not applicable.
[8-03]
Setting is not applicable.
[8-04]
Freeze-up prevention.
The unit has a freeze-up prevention functionality for which
3 levels can be selected:
[8-04]
=0 prevention level 0 (default: no prevention).
[8-04]
=1 prevention level 1.
[8-04]
=2 prevention level 2.
The freeze-up prevention is only active when the unit is in thermo
OFF condition. If prevention level 1 is enabled, the freeze-up
prevention will start if the outdoor ambient temperature <39°F
(4°C) and if leaving or return water temperature <45°F (7°C). For
prevention level 2, the freeze-up prevention will start as soon as
the ambient temperature <39°F (4°C).
For both cases the pump will operate and if leaving or return
water <50°F (10°C) for 5 minutes the unit will start up to prevent
too low temperatures.
[9] Automatic temperature compensation
If needed, it is possible to adjust some thermistor value of the unit by
a correction value. This can be used as countermeasure for
thermistor tolerances or capacity shortage.
The compensated temperature (= measured temperature plus
compensation value) is then used for controlling the system and will
be displayed in the temperature read-out mode.
[9-00]
Leaving water temperature compensation value for
heating operation.
[9-01]
Leaving water thermistor auto corrective function.
When enabled, this function will take into account the outdoor
ambient conditions and correct the measured value which will be
used for the logic.
Eg. when the ambient temperature is high during cooling mode,
the logic will correct the measured value of the leaving water
thermistor to a lower value to take into account influence of high
ambient temperatures in the measurement.
[9-02]
Setting is not applicable.
[9-03]
Leaving water temperature compensation value for
cooling operation.
[9-04]
Setting not applicable.
[A] Option setup
[A-00]
Setting is not applicable.
[A-01]
Setting is not applicable.
[A-02]
Pump target ΔT setting (heating).
Depending on the systems emitter type, the ΔT over the emitter
can be modified within the range 5.4~14.4°F (3~8°C). Default
value is 9°F (5°C) for fancoil units or floor heating loops.
[A-03]
Leaving water temperature overshoot/undershoot value
This setting makes it possible to set the allowable overshoot
(heating)/undershoot (cooling) when operating the unit during
leaving water control.
[A-04]
Setting is not applicable.
[b] Settings are not applicable
[C] Leaving water temperature limits
[C-00]
Maximum leaving water set point in heating operation.
[C-01]
Minimum leaving water set point in heating operation.
[C-02]
Maximum leaving water set point in cooling operation.
[C-03]
Minimum leaving water set point in cooling operation.
If a leaving water temperature of 50°F (10°C) is wanted, this limit
needs to be adjusted. Be aware this can have an impact towards
the efficiency of your system.
[C-04]
Setting is not applicable.
[d] Settings are not applicable
[E] Service mode
[E-00]
Setting is not applicable.
[E-01]
Setting is not applicable.
[E-02]
Setting is not applicable.
[E-03]
Setting is not applicable.
[E-04]
Pump only operation (air purge function)
When installing and commisioning the unit it is very important to
get all air out of the water circuit.
Through this field setting the pump can be operated without
actual operation of the unit. By doing so this will enhance the air
removal from the unit.
[E-04]
=0 normal operation of the unit (default)
[E-04]
=1 low pump speed operation
[E-04]
=2 high pump speed operation
If you select [E-04]=1 or 2, the unit will activate the air
purging function. This function is a helpful feature to get all air
removed out of the system (as well in space heating as
space cooling).
[F] Option setup
[F-00]
Pump target ΔT setting (cooling).
Depending on the systems emitter type, the ΔT over the emitter
can be modified within the range 5.4~14.4°F (3~8°C). Default
value is 9°F (5°C) for fancoil units or floor heating loops.
[F-01]
Setting is not applicable.
[F-02]
Setting is not applicable.
[F-03]
Setting is not applicable.
[F-04]
Setting is not applicable.
INFORMATION
If by mistake the value of [3-03] is set higher than the value
of [3-02], the value of [3-03] will always be used.
[E-04]=1 or 2
W
Pump operation for 40 minutes
01_EN_3P616151-1A.fm 21 ページ ２０２１年１２月１４日 火曜日 午後１時２９分
