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

User Manual
1 / 33
Contents
1 / 33
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

User Manual
2 / 33
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

User Manual
3 / 33
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.

User Manual
4 / 33
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.

User Manual
5 / 33
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

User Manual
6 / 33
2.2. Control Board Input / Output

User Manual
7 / 33

User Manual
8 / 33

User Manual
9 / 33
2.3. Control Board Connection Diagram (PWM)

User Manual
10 / 33
3. Controller Options
3.1. Basic Controller
The Basic Controller was designed to allow the user to simply control all the basic
functions of the unit. There are 3 basic buttons and 4 leds on it.
3.1.1. Buttons
Function Button Activity
Unit Start / Stop 1 Press for 3 seconds
To increase fan speed Press
To decrease fan speed Press
To activate “boost” function 2 Press
To reset the unit 3 Press for 3 seconds
To reset the duration of filter
replacement depending on time 4 Press for 3 seconds
To activate VOD mode 5 or Press for 3 seconds
Child lock Press for 3 seconds
1
Cannot open or close if BMS (8.1) is active
2
Cannot change the fan speed if “Boost” function is active
3
Reset works if the unit is off
4
Cannot work if the unit has filter sensor
5
If the VOD mode is active and Sensor connected
Buttons
Fan speed
leds (blue)
Warning
led (red)

User Manual
11 / 33
3.1.2. Leds
H M L ! Description
Unit off
Fan speed is “high”.
Fan speed is “mid”.
Fan speed is “low”.
Fan speed is “boost”.
VOD mode isactive.
Fire function is active.
Failure warning (see Part III).
Led is off Led is on Blink
Cable connection
Cable type: Flat (6x)
Maximum lenght: 20m

User Manual
12 / 33
3.2. Digital Controller
The Digital Controller was designed to control all the functions of the unit and to
change settings related to the unit. It has 4 buttons and 1 graphic display.
3.2.1. Buttons
Function Button Activity
Unit Start / Stop
1
Press for 3 seconds
To switch to screens in between. (If not
select anything on screen)
Next screen Press
Previous screen Press
To change any value on screen (If select
something on screen) Press
To increase existing value Press
To decrease existing value Press
To exit existing menu Press
To activate “boost” function
2
Press for 3 seconds
To reset the unit
3
Press for 3 seconds
To reset the duration of filter replacement
depending on time 4
Press for 3 seconds
To adjust screen brightness and contrast Press for 3 seconds
Child lock Press for 3 seconds
1
Cannot open or close if BMS (8.1) is active
2
Cannot change the fan speed if “Boost” function is active
3
Reset works if the unit is off
4
Cannot work if the unit has filter sensor
Buttons
Graphic
LCD
Screen

User Manual
13 / 33
3.2.2. Screenshots
1.Screen
Main Screen
4.Screen
Adjust
2.Screen
Timer
5.Screen
Company
Logo
3.Screen
Information
“1.Screen” Symbols: Main Screen
“1.Screen” Symbols: Main Screen (for DX Unit)
1
2
3
6
8
11
9
12
10
7
5
4
13
Info
Input
7
14
15
Info
Input

User Manual
14 / 33
1.Symbol: Fresh Air Fan 2.Symbol: Exhaust Fan
Off Off
Fan speed “low” Fan speed “low”
Fan speed “mid” Fan speed “mid”
Fan speed “high Fan speed “high
Fan speed “boost” Fan speed “boost”
VOD mode is active VOD mode is active
3.Symbol: Heat exchanger (Plate or Rotor) & By-Pass damper
Exchanger: Plate type
By-Pass: not available
Unit: Off
Exchanger: Plate type
By-Pass: Available /Closed
Unit: Off
Exchanger: Plate type
By-Pass: not available
Unit: Working
Exchanger: Plate type
By-Pass: Available / Closed
Unit: Working
Exchanger: Rotor type
By-Pass: not available
Unit: Off
Exchanger: Plate type
By-Pass: Available / Open
Unit: Working
Exchanger: Rotor type
By-Pass: not available
Unit: Working
4.Symbol Air temprerature on Panel (T_PA). Temperature set value when selected.
5.Symbol Return air temperature (T_RA)
6.Symbol Outdoor air temperature (T_OA)
7.Symbol Supply air temperature (T_SA). (if sensor is available)

User Manual
15 / 33
8.Symbol: Preheater
Not available
Type: Preheater
Status: Closed
Type: Preheater
Status: Open
9.Symbol: Pymbol for post heater and cooling coil
Not available
Type: Water coil
Status: Closed
Type: Heater
Status: Closed
Type: Water coil
Status: Open / Cooling mode
Type: Heater
Status: Open
Type: Water coil
Status: Open / Heating mode
Type: Water cooling coil
Status: Closed
Type: Water cooling coil
Status: Open
10.Symbol: Sensor
CO
2
sensor is available (1.3.3)
Humidity sensor is available (1.3.2)
Sensor supplied by the user
11.Symbol: Timer
The day of the week
BMS is active
12.Symbol Fault code
13.Symbol: Defrost
Frost protection is active
Frost protection is active for DX
system
14.Symbol: DX System 15.Symbol: DX Coil
DX system is working in
“cooling” mode.
DX coil: DX system isclosed.
DX system is working in
“heating” mode.
DX coil: it works as an
evaporator.
DX system is working in “auto”
mode.
DX coil: it works as
a condenser.
DX system is closed. Ventilation
mode is active.

User Manual
16 / 33
“2.Screen” Symbols: Timer
1.Field Day of the week selection
2.Field Fan mode selection
3.Field Clock selection
4.Field System time information
“3.Screen” Symbols: Information
1.Field Temperature sensor values [°C]
2.Field Sensor values [mV]
3.Field Fan speed values [rpm] (if fan tacho connection is available)
4.Field Fan speed values [%]
1
2
3
4
Info
Input
1
2
3
4
Info
Input

User Manual
17 / 33
“4.Screen” Symbols: Settings
1.Field Date setting [YYYY.MM.DD]
2.Field Clock setting [HH:MM]
3.Field
1
st
day of the week selection.
For example, if the 1st day of the week is Monday and today is Wednesday, the entry
value should be 3, if the 1st day of the week is Sunday and today is Wednesday, the entry
value should be 4
4.Field Screen contrast value
5.Field Screen brightness value
1
3
2
4
5
Info
Input
The Digital Controller will be wired into the PCB board in the MODBUS connector as per the following wiring
diagram.
Cable type: Cat6
Maximum lenght: 50m
+12V : blue & blue-white
GND : brown & Brown-white
A : orange-white
B : orange

User Manual
18 / 33
PART II – WORKING SCENARIO
1. Fan Speed Control
I/O FAN_OA, FAN_RA
Default values
Fresh air fan “low” speed value
Fresh air fan “high” speed value
Fresh air fan failure data entry method
Exhaust air fan “low” speed value
Exhaust air fan “high” speed value
Exhaust air fan failure data entry method
%30
%80
“tacho”
%30
%80
“tacho”
It is the function of controlling the speed of the fresh air and exhaust fans on the device. There are 3speed
levels (L, M, H) and 1"boost" speed, in total 4 speed levels. Control board medium speed "M"; is calculated
from the arithmetic mean of the low “L” and high “H” speeds. Depending on the type of controller used to
control the ventilation unit,these speed step values can be changed.
Fan failure information is set to "tacho" as standard.
Alternatives such as the following are available in fan speed control.
Alternative-1: Manual control
Single fan mode. Operating only fresh air or exhaust fan (except Basic
Controller)
Separate speed control of 2 fans (except Basic Controller)
Alternative-2: Automatic
VOD mode with humidity, CO2or different sensors
Constant flow /Constant pressure
2. Boost Function
I/O [BST] & Control Panels
Default values
Boost speed value for control panel
Boost duration value for control panel
Boost speed value for control board
Boost duration value for control board
%100
15 min.
%80
1 min.
If necessary, the fan speed of the device is set to the fastest position temporarily.
Manual: By pressing the button on the panel. The fans of the device operate at the highest speed (boost
speed) for a certain period of time. It then continues at normal operating speed.
Automatic: Fans will run at Boost speed when a signal is received from input [BST]. It then the fans run at
Boost speed for a certain time, then continue at normal operating speed.
3. Filter Control
I/O [FIL] & Control Board
Default values Filter contamination time 2000 h
Filters on the device must be cleaned at certain times. It is the function that indicates the time of cleaning.
Alternative-1: Device operating time is monitored and the controller displays a warning to clean the filter
when the set time has expired (default).
Alternative-2: The filter can be controlled mechanically. The function is activated with the differential
pressure switch (NC) to be connected to the control card [FIL] input. Thus, when the filter is dirty, the
controller displays a warning to clean the filter. When this function is active, the filter's time control is
disabled.

User Manual
19 / 33
4. By-Pass & Rotor Control
4.1. By-Pass Control
I/O [BYP]
Default values
It is better not to use the heat exchanger in terms of energy saving and comfort during the transition seasons
such as summer to autumn or spring to summer, when the temperature of the outdoor air changes
suddenly and the indoor air can get overheated. In these cases, the fresh air can be passed directly to the
indoor environment by passing the heat recovery exchanger. Depending on the outside temperature, set
temperature and indoor temperature, the control card decides whether to bypass the by-pass.
It has on/off control feature.
4.2. Rotor Control
I/O [RTR]
Default values
It is used to control the rotor on/off in ventilation devices with rotor type heat recovery exchanger. In the
transition seasons, it is better not to use the heat recovery rotor in terms of energy saving and comfort
when the temperature of the outdoor air drops down suddenly during autumn or spring nights or the
temperature of the outdoor air rises very quickly in the afternoons. In these cases, the rotor is stopped and
fresh air can be delivered directly to the interior. Depending on the outside temperature, set temperature
and indoor temperature, the control card decides whether the rotor will operate or not.
5. Heating & Cooling Control
It provides control of the additional heater and/or cooler used to ensure that the fresh air supplied from the
heat recovery device is in the requested parameters These heaters/coolers can be controlled depending
on room or return air temperature, or depending on the supply air temperature.
5.1. Electric Heater or Water Heater Control
I/O
Default values
[HT1], [HT2], [HT3], [HTI]
Cooling time when equipment is off 60 s
It is the stage control of the electric post heater used to increase the blowing air temperature to the comfort
temperature or the water heater battery valve control (on/off) function. It can be operated according to room
temperature or supply air temperature.
There is a fault input for the electric heater (dry contact NC). If this connection is made; A malfunction in the
electric heater will be shown on the control panel and will disable the electric heater.
5.2. Water Heating & Cooling Coil Control
I/O [CHW]
Default values
The water coil (for heating & cooling) used to ensure that the blowing air reaches the comfort temperature is
the valve control (on/off) function. It can be operated according to room temperature or supply air
temperature.