6.3.
Virtual Preheat
Virtual preheat ensures unit operation (along with the
preheat process) at low outside temperatures for the CV80,
AML100, CV200, AML/AMP300 and DV1000 units.
It can operate in two different modes: “Comfort mode” as
standard and “Green mode” as an option.
Settings are made using a PC running the Airlinq Service
Tool.
Comfort mode:
The bypass damper will be opened gradually to direct the
supply air past the heat exchanger direct to the comfort
heater, which will heat the air to inlet temperature (IT).
If the heater’s capacity is utilised to its maximum, the unit
will start to operate as described in the internal control
function “Low Temperature” on page 25.
Green mode:
This setting works in the opposite way to “Comfort mode”.
The function begins by creating unbalanced ventilation
and if this is insufficient, will regulate the bypass damper
as described in “Comfort mode”.
6.4.
High Temperature (“High Temp”)
“High Temperature” automatically reduces the inlet tem-
perature (IT) or the room temperature (RT) to a limited
extent if necessary. The internal control function requires
that the unit is fitted with a bypass damper.
Inlet temperature (IT):
The control function gradually opens the bypass damper
if the inlet temperature (IT) rises 2 °C above the setpoint.
When the bypass damper opens, some of the air is directed
past the heat exchanger. This reduces supply air heating.
Room temperature (RT):
High room temperature is preprogrammed at 25°C. At this
temperature, the upper limit of the temperature range
described as “comfort temperature” is exceeded.
When the room temperature (RT) exceeds the setpoint,
the inlet temperature (IT) is reduced automatically. This
means that the room temperature (RT) can be limited to
an acceptable level.
Setpoint is set using the control panel menu point “High
room temperature” (see also page 18) or a PC running Airlinq
User Tool or Airlinq Service Tool.
NB: To ensure trouble-free operation, we recommend
programming high room temperature higher than the
normal room temperature.
The control function can regulate the inlet temperature
(IT). Similarly, the control system can increase air flow to
100%, if the inlet temperature is at least 5°C under the
room temperature.
The control function is active until the room temperature
(RT) falls 1 °C under the programmed limit “High room
temperature”.
If the air handling unit is fitted with a cooling module, it
will be triggered automatically when the bypass damper
is fully open.
The bypass damper will still be used for regulating inlet
temperature (IT).
The cooling module will stop again when the bypass damper
has been closed for 5 minutes.
26
Summary of Contents for AML 100
Page 39: ...39 Notes ...
