Ensy AHU 200B, Руководство пользователя, Страница: 4 / 72

393930-2 Rev 0: 01.04.2020
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Functions of the Air Handling Unit Controller
The Air Handling Unit controller is designed for domestic and smaller industrial ventilation systems. Heat
recovery can be either passive or active using a heat pump. Air heater can be added to either pre-heat or
after-heating the inlet air.
The air handling unit can also be extended with hot tap water production using a heat pump taking energy
from the exhaust air.
Depending on the complexity and size of the ventilation system the following functionality is available:
•
Ventilation control
•
Temperature control
• Heat recovery
–
via rotor heat exchanger
• Air heater
–
after-heater
• Defrosting
• User functions
• Week program
• External heat source control
•
Filter monitoring via pressure-drop measurement (optional)
2.1
Ventilation control
2.1.1
Start-up
Unit with outputs for air dampers can be configured for a delayed start of the ventilation fans. This gives the air
dampers time to be fully opened before pressure builds up. Via a menu the ventilation start delay can be
adjusted. Inlet starts another 1 minute after the exhaust fan has started.
If low winter ventilation is activated, the unit will always start up at the selected winter low step the first 2
minutes.
2.1.2
Ventilation based on humidity and CO
2
level
A humidity sensor (included) and a CO
2
level sensor (optional) can be connected to the unit controller. The
controller will adjust ventilation based on the desired settings in the Air quality menu.
The installer configures the humidity levels where ventilation should change speed either up or down.
NOTE!
REMOVE THE DUST CAP FROM THE SENSOR AFTER THE UNIT WAS INSTALLED!!!
In the same menu the settings for ensuring a comfortable CO
2
level can be configured. There are two CO
2
levels,
a normal level and a high level where the ventilation speed will be increased.
Both sensors have 3 minutes settling time after start from ventilation step Off. Average = 24 hours average. RH
(high) = A 10%; RH (low) = a 3%
2.2
Temperature control
2.2.1
Low room temperature alarm
This function ensures the room temperature is not getting too cold. If the room temperature is getting below
the room low-temperature limit, the inlet speed is reduced 1 step. After 5 minutes the speed is reduced
again until temperature can be maintained.
If the room temperature cannot be maintained, the fans are stopped, and a Low Room Temp warning is set.
An external room temperature sensor is mounted.
The function can be disabled by setting the Room low limit to off in the Room control menu.
2.2.2
Summer/Winter operation
The controller can automatically switch between summer and winter operation based on the outdoor
temperature. After each shift, the unit stays here for 15 min before another shift is allowed.
The difference between summer/winter operations is the minimum temperature of the inlet air and that the
bypass damper is normally not opened in wintertime.
2.2.3
Control sensor
The controller can use different controlling sensors. Supply: The inlet temperature sensor is used; there is no
room temperature control. Extract: The extract temperature sensor is used.