Airflow Entro-V User manual

80001022–Issue 108/20
Entro-V Controls
Part No: 90001308/90001299
BASIC CONTROLLER, DIGITAL CONTROLLER AND
OTHER CONTROL OPTIONS
User manual

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Contents
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PART I – GENERAL DEFINITIONS . .....................................................................................................3
1. General Information . ...............................................................................................................3
1.1. Introduction . .......................................................................................................................3
1.2. Functions . ..........................................................................................................................4
1.3. Accessories . ......................................................................................................................5
1.3.1. Temperature Sensor . .............................................................................................5
1.3.2. Humidity Sensor . ....................................................................................................5
1.3.3. CO2 Sensor . ...........................................................................................................5
1.3.4. Humidity & CO2 Sensor . .........................................................................................5
1.3.5. Pressure transmitter . ..............................................................................................5
2. Controller PCB Connections . ...............................................................................................5
2.1. Options . .............................................................................................................................5
2.2. Control Board Input / Output . ............................................................................................6
2.3. Control Board Connection Diagram (PWM) . .....................................................................9
3. Controller Options . .................................................................................................................1 0
3.1. Basic Controller. ...............................................................................................................1 0
3.1.1. Buttons . .................................................................................................................1 0
3.1.2. Leds . ......................................................................................................................1 1
3.2. Digital Controller. ..............................................................................................................1 2
3.2.1. Buttons . .................................................................................................................1 2
3.2.2. Screenshots ..........................................................................................................1 3
PART II – WORKING SCENARIO . ..................................................................................................... 18
1. Fan Speed Control . .................................................................................................................18
2. Boost Function . ......................................................................................................................18
3. Filter Control . ..........................................................................................................................18
4. By-Pass & Rotor Control . ......................................................................................................19
4.1. By-Pass Control . ..............................................................................................................19
4.2. Rotor Control . ...................................................................................................................19
5. Heating & Cooling Control. ....................................................................................................19
5.1. Electric Heater or Water Heater Control . .........................................................................19
5.2. Water Heating & Cooling Coil Control . .............................................................................19
5.3. Water Cooling Coil Control . ..............................................................................................20
6. Frost Protection . .....................................................................................................................20
7. Room Temperature Function . ...............................................................................................20
8. BMS Function . ........................................................................................................................20
8.1. External on/off control [BMS]. ...........................................................................................20

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8.2. Status info (Run out) [RUN]. ..............................................................................................20
8.3. Fault info (Fault out) [FLT] . ................................................................................................21
9. Modbus Function . ....................................................................................................................21
9.1. Properties . .........................................................................................................................21
9.2. Physical Connection . .........................................................................................................21
9.3. Modbus Function . ..............................................................................................................21
9.4. Modbus Register List . ........................................................................................................23
10. Timer Function . ......................................................................................................................23
11. Fire Scenario [FRE] . ..............................................................................................................23
12. Child Proof Protection Function . .........................................................................................24
13. Unit Status When Power On . ................................................................................................24
PART III – ALARM (Failure) . ............................................................................................................. 25
1. Fault Info (Fault out) [FLT] . ......................................................................................................2 5
2. Fault Code List . .........................................................................................................................2 5
Annex.A – SERVICE OPERATIONS . ................................................................................................ 26
1. Basic Controller.........................................................................................................................2 6
2. Digital Controller........................................................................................................................2 6
3. Register List . .............................................................................................................................2 8

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PART I – GENERAL DEFINITIONS
1. General Information
1.1. Introduction
Lately, most of the people's life is spent indoors (at home, office, etc) and indoor air quality has become a
very important topic. To help reducing the indoor air pollution, heat recovery units have been designed.
Mechanical Ventilation with Heat Recovery (MVHR) ensures that the stale air is extracted from the indoor
environment, heat is recovered within the plate heat exchanger, and fresh filtered air is supplied
indoors being warmed-up within the heat recovery core at a requested temperature. Many design building
projects include heat recovery units being requested by the users. The biggest challenge in using
these units is the controller. The main difference between basic heating-cooling systems (fan-coil, duct type
fan, duct type indoor units, etc.) and ventilation units is that the ventilation units have two fans to control
(supply and extract fans). Both fans must be controlled separately in various operating conditions.
For instance, in some cases it may be requested to keep the ventilated environment to a positive
pressure (supply only) or a negative pressure (extraction only). In this case, it is required to set both
fans at different speeds or one fan on and the other fan off. Also, it is possible to adjust the
ventilation amount automatically depending on the amount of CO2 or moisture in these units, which
leads to saving energy, thanks to the on-demand ventilation. In addition, according to the latest building
regulations, the summer by-pass function is a requirement (the fresh air is bypassing the plate
heat exchanger, being supplied indoors directly). Thanks to the HRU Controller developed by our
company, all functions and safety requirements expected from a heat recovery unit can be met.
Different working scenarios have been created for customer's demands and control of different
ancillaries to be used with the units.

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1.2. Functions
Function Definition
Fan Speed Control
•Manual: 3 steps fan speed control for EC or AC fans
oSingle fan mode
oIndividual speed control of the fans
•Automatic
oWith sensors (Humdity, CO2, etc.)
oConstant volume or Constant pressure
Boost Function
It is used for increasing fan speed if necessary
•Manual: Boost button on Control panel
•Automatic: Dry contact on control board
Filter Function
It warns the user when the filters are dirty.
•Alternative-1: Dependson time
•Alternative-2: Pressure switch
By-Pass Function
Rotor Function
Electric Heater Control
Function
Coil Control Function
Frost Protection Function
Filtered fresh air is supplied indoor without passing through heat exchanger
It controls the rotor on/off in the ventilation units with rotor type heat
recovery exchanger.
Electric Heater steps control.
Cooling or Heating/Cooling water coil control.
Heat exchanger frost protection
•Alternative-1: By-Pass damper
•Alternative-2: Fan speed control
•Alternative-3: Electric Preheater steps control
Preheater Function Electric preheater steps control for frost protection.
Room Temperature Function Enables selection of return air temperature or control panel temperature as
room temperature.
BMS Function
It allows simple control of the unit from a central control system and
monitoring of the situation.
•BMS: Unit can be on/off via dry contact on control board
•Run out: Information of “unit status”
•Fault out: Information of “fault”
Modbus
Timer
Log Function
Fire Function
Child-Proof Protection
Function
Wireless Control
IoT Function
Service Interface
It controls all functions ofunit via PCorcentral control system.
Unit can be programmed to operate on certain days of the week.
All possible working options of the unit can be recorded.
It is used for changing working status of the unit in case of fire.
It is used to lock the key on control panel.
It provides the connection of wireless (RF) control panel and wireless room
sensors to the unit.
It allows the features of the unit to be followed over the internet.
The unit provides adjustment of all operating parameters and functions.

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1.3. Accessories
1.3.1. Temperature Sensor
NTC 10kΩ (@25°C) type sensor is used for air temperature measurement. The control card has been
calibrated according to this sensor. It is suitable for duct type installation.
1.3.2. Humidity Sensor
This sensor is used for air humidity measurement. The control card has been calibrated according to this
sensor. It is suitable for duct type installation.
1.3.3. CO2 Sensor
This sensor is used for amount of CO2 measurement in air. The control card has been calibrated according to
this sensor. It is suitable for duct type installation.
1.3.4. Humidity & CO2 Sensor
This sensor is used for air humididty and amount of CO2 measurement in air. It is formed by the combination
of 2 sensors (1.3.2 and 1.3.3). The control card has been calibrated according to this sensor. It is suitable for
duct type installation.
1.3.5. Pressure transmitter
It is the sensor used to measure the air pressure difference. It can be used for constant flow, constant
pressure functions and filter pollution measurement. The control card has been calibrated according to this
sensor. It is suitable for duct type installation.
2. Controller PCB Options
2.1. Options
Fan control options
PWM (0~10V)
Voltage control (AC)
Connection type options
Connector
Socket
RF control options
With RF control
Without RF control

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2.2. Control Board Input / Output

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2.3. Control Board Connection Diagram (PWM)