Airflow Entro DV250 User manual

80000496 –Issue 310/18
DV250/DV300/DV400 Entro
Part No: 90000397/90000398/90000399
Use, maintenance and installation manual

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1. Contents
1. Contents.......................................................................................................................................................................... 2
2. Operating the equipment –CPA controller...................................................................................................................... 3
2.1. Performance settings .............................................................................................................................................. 3
2.2. Unit’s operating modes............................................................................................................................................ 4
2.3. Description of controls............................................................................................................................................. 4
2.3.1 Basic menu....................................................................................................................................................... 4
2.3.2 “MODE” menu (operating mode)...................................................................................................................... 5
2.3.3 Menu “PROGRAM” (weekly program).............................................................................................................. 5
2.3.4 “PARTY” and “HOLIDAY” menu (temporary operating modes)........................................................................ 6
2.3.5 “REHEAT” menu (air reheat) ............................................................................................................................ 6
2.4. User system settings............................................................................................................................................... 6
2.4.1 “FILTER” menu ................................................................................................................................................. 6
2.4.2 “TIME” menu..................................................................................................................................................... 7
2.4.3 “INPUT” menu .................................................................................................................................................. 7
2.4.4 “SWITCH” menu (binary input DI1) .................................................................................................................. 7
2.4.5 “SENSOR” menu (analogue input IN1) ............................................................................................................ 7
2.4.6 “LIMIT” menu .................................................................................................................................................... 8
2.4.7 “TEMPERATURE” menu .................................................................................................................................. 8
2.4.8 “DISPLAY” menu .............................................................................................................................................. 8
2.4.9 “LANGUAGE” menu......................................................................................................................................... 8
2.4.10 Automatic ventilation modes............................................................................................................................. 8
2.4.11 Constant pressure in a supply line.................................................................................................................... 9
2.4.12 Warning messages........................................................................................................................................... 9
2.4.13 Supply air reheat mode..................................................................................................................................... 9
2.5. Operating the equipment –the CPB controller........................................................................................................ 9
2.6. Performance settings ............................................................................................................................................ 10
2.7. Description of controls........................................................................................................................................... 10
2.8. Limiting ventilation capacity................................................................................................................................... 10
3. Equipment maintenance by the user ............................................................................................................................ 10
3.1. Basic instructions, filter replacement, maintenance and cleaning......................................................................... 10
3.2. G4 / F7 filter cloth replacement............................................................................................................................. 10
3.3. Cleaning the plastic heat recovery exchanger .......................................................................................................11
3.4. Cleaning the CPA controller................................................................................................................................... 13
3.5. Other miscellaneous maintenance........................................................................................................................ 13
4. Faults, errors and troubleshooting ................................................................................................................................ 13
4.1. Description of fault messages and their causes.................................................................................................... 13
5. Storage and transport device........................................................................................................................................ 14
6. Equipment installation and commissioning................................................................................................................... 14
6.1. Package content.................................................................................................................................................... 14
6.2. Key dimensions of the equipment......................................................................................................................... 14
6.3. Overview of installation positions and versions..................................................................................................... 15
6.4. Mounting the unit, fixing points.............................................................................................................................. 16
6.5. Fitting the unit, sloping, distances ......................................................................................................................... 17
6.6. Fitting the condensate drain.................................................................................................................................. 18
6.7. Connecting the condensate drain –under-ceiling installation............................................................................... 18
6.8. Connecting the condensate drain –floor-standing................................................................................................ 18
6.9. Connecting the condensate drain –floor-standing flat.......................................................................................... 19
6.10. Fitting the line on the sleeve........................................................................................................................... 20
6.11. Installation of additional SK cover................................................................................................................... 20
6.12. Filter types...................................................................................................................................................... 21
6.13. Installing optional accessories........................................................................................................................ 21
7. Installing controllers, changing positions, electrical connections.................................................................................. 21
7.1. Installing the controller........................................................................................................................................... 21
7.2. Permanent imbalancing of supply and exhaust fans............................................................................................. 22
7.3. Changing the orientation of Entro units................................................................................................................. 22
7.4. Wiring diagram...................................................................................................................................................... 24
7.5. Equipment’s manufacturing label .......................................................................................................................... 25
8. Important notices .......................................................................................................................................................... 25
9. Declaration of conformity.............................................................................................................................................. 26
10.Commissioning the unit................................................................................................................................................. 27
11.Warranty........................................................................................................................................................................ 28

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2. Operating the equipment –CPA controller
The equipment operated using a CPA controller with touch-screen display.
Description of functions:
Controls are divided into user and servicing sections (accessible by service technicians only).
Ventilation capacity can be set in a range of 0-100 %.
Options to switch on the air reheater, air preheater and shut-off damper servo drive.
Control in manual mode or via separate weekly programs for ventilation capacity and air reheating.
Additional operating mode “Party” (a temporary increase in capacity) and “Holiday” (temporary ventilation switch-off).
An option to control ventilation automatically by external sensors (air quality, CO2, relative humidity etc.).
An option to start increased ventilation using external switches, e.g. in the bathroom or toilet.
An option to limit maximum and minimum ventilation capacity.
Displays the current room temperature and operating mode.
Alerts to the need for air filter replacement.
Display:
1. Time
2. Alerts (e.g. the need for filter replacement)
3. Date
4. Current room temperature
5. Air reheating indication (if the system includes a
reheater)
6. Ventilation capacity setting in %
7. Selected operating mode
Description of controls:
Short press –general controls and parameter settings
Long press (3s) of the ventilation capacity symbol –quick operation on / off
Long press (5s) at the top of the display –entering the service menu
2.1. Performance settings
When a CPA controller is used for controlling and programming, the capacity is shown (displayed) in per cents of the maximum.
The table shows approximate air flow rates (m3/h); they may vary depending on the duct network.
Entro
Off
0
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
DV250
OFF
Unit responds to
sensors and external
inputs
20
35
95
120
155
180
200
220
240
250
DV300
OFF
Unit responds to
sensors and external
inputs
20
40
110
160
200
230
250
275
305
315
DV400
OFF
Unit responds to
sensors and external
inputs
30
50
140
200
260
300
320
350
380
400

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2.2. Unit’s operating modes
The HVAC unit works according to settings made by the controller, external inputs from the bathroom, toilet or kitchen and air quality
sensors in following modes:
2.3. Description of controls
The operating modes of the unit can be changed by selecting functions and parameters in the respective menus by using the touch-
screen display.
The requested option (changing the function or parameter) in each menu must be confirmed by pressing the "OK" symbol
or a symbol of "arrows" to move to the next menu. If you press the symbol "Esc", then the option is ignored and the system
automatically returns to basic (Information) menu.
Note –in idle (display) state is the touch screen CPA glazed over, at the first touch automatically activates the backlight display, next
touch can change particular functions (see description below).
2.3.1 Basic menu
Operating mode selection
Ventilation capacity selection or operation start / end
Switching on air reheating (if a reheater is installed in the system)
Displayed
mode
Description
Suitable application
(data may vary depending on national regulations)
“Manual mode” –a general ventilation mode,
with ventilation provided by the unit according
to current settings.
Continuous ventilation during occupancy, with the capacity
set at outside temperatures as follows:
Above approx. -5°C to approx. 25 m3/h/person, i.e. for
4 persons 100 m3/h, with 70 m3/h set at night.
Below approx. -5°C to approx. 20 m3/h/person, i.e. for
4 persons 80 m3/h, with 50 m3/h set at night.
“Weekly program” –a general ventilation
mode, with a required rate of ventilation
provided by the unit according to schedule
parameters.
“Automatic mode” –the capacity of ventilation
is set by an active external input, i.e. the
user's request from the bathroom / toilet /
kitchen or according to an air quality, CO2,
humidity etc., if installed.
The unit switches over to these modes automatically if
current ventilation demand exceeds the capacity set in
manual mode or a weekly program.
“Ventilation run-down time” –a temporary
ventilation mode which stops automatically
after the pre-set time has elapsed.
The unit switches over to this mode automatically after a
request from the bathroom / toilet / kitchen has expired
(if a run-down time is set).
The “Party” mode is temporary and stops
according to the pre-set time.
A temporary mode for less frequent use of the building,
such as a party attended by a large number of people
(a request for higher ventilation capacity).
The “Holiday” mode is temporary and stops
according to the pre-set date and time; after
that a weekly program is activated
automatically.
A temporary mode for less frequent use of the building,
such as a holiday (a unit deactivation request).

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If operation is ended by setting ventilation capacity to “OFF”, the unit does not respond to an external request, i.e. switches
in the bathroom / toilet / kitchen and the air quality sensor are ignored).
If power is set to "0 %", then the fans are stopped and the unit is not ventilating. In contrast to the "OFF" state, in this "0 %" mode
is still active automatic start according to external switches.
Note –if none of buttons in submenus is pushed for a long period of time, then the CPA driver automatically switches to the main
menu.
2.3.2 “MODE” menu (operating mode)
Selecting a weekly program / manual mode / Party mode / Holiday mode
If more than one parameter is shown in the menu, you can switch between these by a short press; a parameter can be set by
pressing “+” and “-“repeatedly (setting can be faster if you press and hold the symbol).
2.3.3 Menu “PROGRAM”(weekly program)
Setting a weekly program (time schedule) for ventilation capacity
Setting a weekly program for starting air reheat
Changes made in a weekly program for a selected period of Mon-Sun / Mon-Fri / Sat-Sun are effected in all selected days
together, while changes made for a period of Mon / Tue / Wed / Thu / Fri / Sat / Sun are effected only for the specific selected day.
Warning:
If one or more days of the week have been set individually, parameters for these individual days will be rewritten according
to the new settings when a period of Mon-Sun / Mon-Fri / Sat-Sun is subsequently selected in adjustment mode (the pencil symbol).

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2.3.4 “PARTY”and “HOLIDAY” menu (temporary operating modes)
Setting the required ventilation capacity of the “Party” mode in a range of 20 –100 %
Setting the duration of the “Party” mode in a range between 10 minutes and 5 hours
Setting the time and date of ending the “Holiday” mode
After the “Party” mode has finished, the unit automatically returns to the operating mode selected before that; when the “Hol iday”
mode has finished, the unit automatically switches over to operating mode which is current according to a weekly program.
Note –The “Party” and “Holiday” modes can be stopped early by selecting another operating mode.
2.3.5 “REHEAT” menu (air reheat)
Starting air reheat in manual mode
This menu is accessible only provided that an electric or hot-water air reheater is installed (selection in the service menu).
Information on air reheater operation is indicated in the basic menu by symbols and .
Note –Air reheating with an electric heater is only possible with a minimum ventilation capacity of 30 % due to a sufficient air flow
rate for cooling the heating elements.
2.4. User system settings
Using directional arrows you can move between individual user menus:
MODE / VENTILATION / REHEAT / FILTER / TIME / SETTINGS
By pressing “OK” in the “SETTINGS” menu other parameter menus become accessible:
INPUT / SWITCH / SENSOR / SENSOR / LIMIT / TEMPERATURE / DISPLAY / FIRMWARE / LANGUAGE / LANGUAGE /
LANGUAGE
WARNING –The wrong parameter settings can have a negative influence on the proper operation of the
equipment!
2.4.1 “FILTER”menu
Indication of the number of days left until the air filter must be replaced
Setting the regular filter replacement interval in a range of 30 –150 days (by 10 day periods)
Filter replacement confirmation (a new countdown automatically starts after confirmation)
The regular filter replacement interval should be set according to the dust and pollen load of the outdoor environment.

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2.4.2 “TIME” menu
Date and time setting
Selecting between 12 and 24 hour time format
Note –Automatic switching between summer and winter times (DST) is not supported.
2.4.3 “INPUT” menu
An option to allow / disallow the increased ventilation capacity function.
Binary input DI1 for connecting external voltage-free switches in bathrooms, toilets or kitchens.
An option to allow / disallow the function of automatic ventilation control according to the concentration of the quantity being
measured.
Analogue input IN1 for connecting an external sensor (sensor “S“) with a 0-10V signal output which can monitor air quality,
CO2concentration, relative humidity etc.
2.4.4 “SWITCH” menu (binary input DI1)
Setting ventilation capacity in a range of 10 –100 % with input DI1 closed
Setting a function’s start delay time in a range of 0 –300 s (in 10 second steps)
Setting a function’s run-down time in a range of 0 –300 s (in 10 second steps)
If a button is used the start delay time must be set to “0 s” in order for the short press of the button to be accepted, and the run-down
time must be set to a non-zero value.
2.4.5 “SENSOR” menu (analogue input IN1)
Setting the ventilation curve in relation to the level of the 0-10V signal from an external sensor
This function allows suitably adjusting the unit’s response (ventilation capacity) to a gradual increase in the concentration of the
quantity being measured, e.g. for economical or noise reasons.
The “inverse” setting of ventilation capacity response to the 0-10V control signal is also supported, i.e. the reverse direction of curve
A-B).
This function allows connecting also a sensor with a different output voltage range, e.g. 0-5V or 2-10V.

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2.4.6 “LIMIT” menu
Setting maximum and minimum permitted ventilation capacity limits
An option to allow / disallow the operation OFF function (ventilation capacity = OFF)
Attention –Settings in the “LIMIT” menu subsequently affect (limit) all operating modes and parameter settings in other user
menus.
If the “Min:”parameter is set to a non-zero value, the unit can be switched off only by a long press (3 s) of the ventilation symbol in
the basic menu or manually selecting ventilation capacity OFF (if permitted).
2.4.7 “TEMPERATURE” menu
Setting the calibration of the internal air temperature in a range of +/- 3°C (in 0.5 °C steps)
2.4.8 “DISPLAY” menu
Setting the display brightness and contrast (recommended values are 70 % and 50 %)
2.4.9 “LANGUAGE” menu
Setting the menu language
Note –If the controller has been disconnected from power supply for more than 48 hours, the language is automatically set to
English when switched on again.
2.4.10 Automatic ventilation modes
If there is a discrepancy between the operating mode displayed and the one set manually by the user or a weekly program, then the
current operation of the equipment (ventilation capacity) is affected by external request via a contact or analogue input (sensor).
- A request from a switch in A request from an air quality
the bathroom / toilet / kitchen / CO2/ relative humidity sensor

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2.4.11 Constant pressure in a supply line
If the unit is operated under constant pressure in the supply line (set in the service menu), then in the "FANS" and "PROGRAM"
options are available: OFF / 0% / /
The symbols "sun" and "moon" are the two possible levels of pressure required, is standard operating (daily) pressure value,
symbolizes the lower pressure value specified for night setback (e.g. due to noise).
This special mode in cooperation with the duct pressure sensor is able to provide automatic control of ventilation capacity by varying
the number of ventilated rooms in the building (e.g. central ventilation of residential house)
Note –If a problem occurs during operation, the measurement of pressure in the supply line (e.g. due to pressure sensor failure),
it is possible to cancel CS ("constant sensor") in the user menu "Inputs" and to deactivate ventilation on constant pressure.
Now you can control the fans performance standard way in manual mode or by setting a weekly program (see description in chapter
2.3.1 and 2.3.2).
2.4.12 Warning messages
The controller may display some warning messages during operation which alert to the need for replacing an air filter or flat battery;
if the equipment has a defect, a warning message is shown recommending contacting the service department.
Replacing the controller's battery:
Before replacing the battery, disconnect the equipment from power supply!
Then use a tool such as a flat screwdriver to apply pressure onto "lock" on the bottom of the controller and remove the front panel
with display. Now it is possible to replace the CR1632 battery and put the two parts of the controller back together. After turning it on
it is necessary to set the correct time and date.
2.4.13 Supply air reheat mode
Only external EPO-PTC series duct electric air heaters, fitted with their own thermostat to set air temperature downstream
the heater, can be connected to the equipment.
Up to two such heaters may be connected simultaneously can be connected in the following configuration:
As a fresh air pre-heater (before the unit's inlet)
The heater works fully automatically without being switching by the user, solely based on the temperature setting; this
function (air preheating) only works when the unit is running.
As a reheater of air supplied into the building (it is located at the unit's outlet, downstream heat recovery)
The heater is started by the user with the controller in manual mode or according to weekly program settings. The reheating
function is only active when the unit is running.
Heaters must be fitted and connected according to the wiring diagram and only by a person with a relevant licence.
Before the heater is put into operation, the temperature required downstream the heater must be set on the thermostat:
For a pre-heater: from 0 °C to +4 °C
For a reheater: between 10 and 35 °C
2.5. Operating the equipment –the CPB controller
As standard, the equipment is operated using a simple CPB controller.
Description of functions:
Ventilation capacity setting in a range of 0-100 %.
An option to start the air reheater.
An option to start the shut-off damper servo drive.
An automatic ventilation control option according to an external sensor (air quality, CO2, relative humidity etc.).

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An option to increase ventilation capacity using external switches, e.g. in the bathroom or toilet.
An option to limit maximum and minimum ventilation capacity.
Equipment operation indication. Description of controls:
1. Ventilation capacity setting
2. Signaling LED
3. Operation indication
2.6. Performance settings
Identical to those the table in chapter 2.1. The HVAC unit operates according to settings by the controller, the closing of external
inputs from the bathroom, toilet or kitchen, or an air quality sensor.
2.7. Description of controls
Selecting ventilation capacity or starting / stopping operation
-Rotate the controller to set the required ventilation capacity in a range of 10–100 %.
-Ventilation is stopped by turning the controller anti-clockwise until it reaches the symbol "0" at the end position; however the
equipment still responds to external commands –see the chapter 3.3.
Starting air reheat
-The setting applies only provided that an external air heater with its own thermostat is fitted.
-Start air reheat by pressing the button in the right hand bottom corner of the controller next to the thermometer symbol (stop by
pressing again)
Note:
-Air is reheated only when the unit is running.
-The thermostat temperature is set by the technician in charge of installing the equipment in a range between 15 and 35 °C
2.8. Limiting ventilation capacity
Removing the rotary controller provides access to other control features, the turning of which sets the minimum and maximum
ventilation capacity levels (a full range of 0-100 % is set by the manufacturer).
Description:
1. Setting of min. ventilation capacity
2. Setting of max. ventilation capacity
3. Equipment maintenance by the user
3.1. Basic instructions, filter replacement, maintenance and cleaning
Maintenance involves visually checking the equipment, regularly replacing filters and cleaning the heat recovery exchanger.
During maintenance observe the rules of personal hygiene and use protective equipment (a face mask, packaging for
contaminated filters).
Before starting maintenance of the unit, always disconnect the equipment from power supply by unplugging the plug
from the power socket.
During maintenance observe safety instructions contained in the manual (“Important notice”), follow the fundamental rules of
safe work and use suitable means of accessing HVAC equipment (ladders, stepladders).
3.2. G4 / F7 filter cloth replacement
You should replace the filter cloth only provided that you do not suffer from allergic reactions to dust particles. Do not conduct
replacement when people with such a level of sensitivity are present.
Replace the filter cloth from the filter frame in a well-ventilated area or out of doors.
Before removing the frame with cloth, we recommend that you should have an air-tight bag (a plastic carrier bag etc.) ready to
carry the frame to a suitable area to conduct replacement and subsequently use it to dispose of the contaminated cloth, e.g. with
common waste.
Replacement is carried out depending on the dust load of the ambient environment between every 500 and 2,000 operation
hours (usually approx. 2 - 3 months). The recommended inspection interval is indicated on the controller's display.
Green - ON=> The unit's ventilation power matches the level set on the
controller
Red - ON=> The pre-heater is running (if installed)
Red - long-interval flashing=>The red LED is on for 0.3s and then off for
4.7s; this flashing indicates that filters must be replaced.
Red - short-interval flashing=> The red LED is on for 0.1s and then off for
0.2s; this flashing indicates a controller fault - contact a service technician.

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When replacing filters, do not remove the unit’s door – use the special cover for filter replacing.
Sliding the filter frame out of the unit and replacing the cloth
Release the filter plugs in the
housing unit using the product in
the package –pull straight on
Do not pull on a slant!
Remove the cover on the unit’s
enclosure
-start from the bigger recess
Take out the frame with filter cloth
Slide a new filter cloth onto the frame - the
fibre is to be slid onto the frame
Properly fitted cloth –the blue /
red side faces the unit’s ports
and the white one the heat
recovery exchanger
Fitting filter covers
-proceed from one side to another
Press the cover into the unit’s enclosure so
that it is flush with the lid’s edge along the
entire perimeter
3.3. Cleaning the plastic heat recovery exchanger
The recommended interval of heat recovery exchanger cleaning is about 2 years, depending on the nature of the operating
environment.
If necessary, wash the heat recovery exchanger block with warm water with a detergent several times; the water temperature
should be up to 60 °C, ideally such that you could keep your hands in it comfortably (e.g. BODE Kohrsolin FF).
Do not expose the heat recovery exchanger to ultraviolet light and sunlight; store it in a dark place if necessary.
ATTENTION: Never use cleaning agents that might contain organic solvents to clean the heat recovery exchanger as they
could cause its irreversible damage!

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Removing the heat recovery exchanger
Disconnect the unit from power supply, disconnect the condensate drain in ceiling units, open the unit and unlock the heat recovery
exchanger on both sides.
Note down the position of the heat exchanger (the number depends on the equipment type) for seal fitting. The sticker with letter A
must be by the edge of the fan enclosure.
Remove the cover and unscrew the
locking screws from the unit's lid –4 in
the corners
Remove metal elements
Open the unit’s door carefully and
gradually from one side. Start from the
wiring entry side. With in-ceiling units,
disconnect the condensate drain.
When lifting the lid from the top of locks
hanging from the other side of the lid.
Remove the metal grills on both sides of
the heat exchanger
Remove the screw and loosen the metal
grill.
Unlock the butterfly nut on one side of the exchanger
Eject block recovery exchanger
Follow the procedure in reverse to slide the heat recovery exchanger back in. Before sliding exchangers in, we recommend
lubricating only the seal with silicon oil for easy sliding and increasing the flexibility and life span of the seal.
Side A

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3.4. Cleaning the CPA controller
The CPA controller requires the same maintenance as the lighting switch –cleaning is only possible using a dry cloth; no water may
enter the inside of the controller. Liquids which might damage its surface must not be used for its cleaning (e.g. organic
solvents).
3.5. Other miscellaneous maintenance
Before any intervention with the unit it must be disconnected from power supply!
During filter cloth or cassette replacement and every time you are opening the unit check the following:
The condensate drain in the unit's door or bottom for cleanliness.
Any blockage of the condensate drain might cause serious trouble.
The water level in the condensate drain, especially in summer and autumn. If the level is not high enough, air from the sewer
might be drawn in; flood the condensate drain. If any parts of the equipment are covered in dust, clean them with a slightly damp
cloth.
4.Faults, errors and troubleshooting
4.1. Description of fault messages and their causes
Fault
Description
Possible cause
Troubleshooting
The equipment
cannot be started
The equipment
remains idle even
after the required
performance level
was selected
Power supply is not connected
Connect the equipment to power
supply (switch on upstream safety
circuit breakers)
Not found
Disconnect from power supply and
contact a service technician
The equipment is
not supplying
enough air
The equipment is
providing a
significantly lower
volume of air
Blocked filter
Disconnect the equipment from
power supply
Replace the filter cloth or cassette
If the equipment has been in operation
for more than approx. 4 years, clean
the heat recovery exchanger/s
A mechanical obstacle at fresh
air suction or supply air outlets
Check whether the suction openings of
fresh air or supply air outlets are not
mechanically covered
Remove any obstacles
Visually and by listening check whether
the dampers open properly
Not found
Disconnect from power supply and
contact a service technician
The equipment is
not heating or is
heating
insufficiently
When the heater
has been started,
supply air
continues to be
cold
The electric heater is not
connected to power supply
Connect the equipment to power
supply (switch on upstream safety
circuit breakers) –can only be done by
an authorized person
Response of the electric
heater’s heat protection
Wait to see if the fault does not sort
itself out after approx. 1 hour
Low maximum capacity of the
heater
Does not constitute a fault (insufficient
capacity designed)
Not found
Disconnect from power supply and
contact a service technician
Water is dripping
from the
equipment
Water droplets
form between the
door and body of
the equipment
during operation
The condensate drain siphon is
insufficiently flooded
Disconnect the equipment from
power supply and flood the
condensate drain siphon
The condensate drain is blocked
with dirt
Disconnect the equipment from
power supply and clean the
condensate drain including the siphon
The seal groove is damaged
(the fault can be accompanied
by a whistling sound caused by
air flowing through the gap)
Disconnect the equipment from
power supply and replace the seal
Water droplets
form at the
condensate drain
connection point
The condensate drain seal or
line is damaged
Disconnect the equipment from
power supply and re-seal the
condensate drain
Not found
Disconnect from power supply and
contact a service technician

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5. Storage and transport device
During transport and storage the prescribed position indicated by the sticker on the box must be observed!
The equipment may only be stored in dry, clean places with ambient temperatures between 0 °C and 50° C. Up to 7 units
may be stored horizontally. The equipment must be placed on a flat, hard surface to avoid damaging it or its packaging.
During storage the equipment must be kept in its original, intact packaging including all spacing, tightening and
indicating elements.
The transport packaging may not be removed until the unit has been delivered at the site of final installation. All parts
which are to come into contact with flowing air must be checked for cleanliness and cleaned if necessary before
installation.
If the equipment is to be handled using a forklift or palette truck, it must be placed on a transport EUR pallet.
During transport the equipment must be protected against any falls, mechanical damage, water leaks and any other
adverse effects that could damage the equipment or its packaging.
6. Equipment installation and commissioning
6.1. Package content
The basic package of Entro units contains the following accessories:
The operation, maintenance and installation manual
An abridged control manual
A CPA controller connected, with a 230 V power supply plug (with a connecting cable length of 3 lm).
Plastic components for connecting the condensate drain line
2 pcs of condensate drain installation kits for floor-standing and floor-standing flat positions (a bushing, seals, nuts)
A mounting kit for fixing the unit (a high nut, 2 washers, a hexagonal screw, a plastic cover).
6.2. Key dimensions of the equipment
DV250 Entro
DV300 Entro
DV400 Entro
Dimensions
W
mm
850
850
850
H
mm
660
820
820
D
mm
280
280
280
Ports
e1
mm
160
160
160
e2
mm
160
160
160
i1
mm
160
160
160
i2
mm
160
160
160
Weight
kg
20
21
21
Condensate drains
mm
2 x ø14 (prepared for 4 more)
Fixing
mm
4 x Ø8
4 x Ø8
4 x Ø8

15
6.3. Overview of installation positions and versions
DV250, DV300, DV400 Entro units can only be installed in the positions indicated. Installation in a different position is not
permitted. Apositional configuration change can only be done as indicated in par. 7.
LEGEND:
e1 –Fresh air supply from the outside
e2 –Supply of air after heat recovery to the interior
i1 –Exhaust air extraction from the interior
i2 –Exhaust air discharge into the atmosphere
K, K1, K2 –Condensate drain
Installation
position
View
Configuration of ports and condensate drain positions
Under-
ceiling
PODSTROPNÍ
PODLAHOVÁ
PARAPETNÍ
K
K
K
K K
PODSTROPNÍ
PODLAHOVÁ
PARAPETNÍ
K
K
K
K K
Floor-
standing
PODSTROPNÍ
PODLAHOVÁ
PARAPETNÍ
K
K
K
K K
PODSTROPNÍ
PODLAHOVÁ
PARAPETNÍ
K
K
K
K K
Floor-
standing flat
PODSTROPNÍ
PODLAHOVÁ
PARAPETNÍ
K
K
K
K K
K1K2

16
6.4. Mounting the unit, fixing points
Before installing the unit, it is necessary to:
Release the filter plugs in the unit housing
Location of safety elements (metal holders)
Remove filters and metal holders
Open the unit’s door carefully, gradually
from one side. Start from the wiring
entry side.
Remove the fan-protecting scrolls.
Check the unit orientation and the
position of internal parts (sensors).
After removing the scrolls insert the air filters back into
the unit including metal holders.
Close the lid and air filters to get the unit to its original state.

17
Anchoring points
DV250 Entro
DV300 Entro, DV400 Entro
4xO9
805
775
280
618
4xO9
280
805
4xO9
805
775
280
618
4xO9
280
805
Anchoring detailed view
1. 1.Entro unit
2. 2.Threaded rod M8 –NOT INCLUDED
3.Wall / ceiling anchor –NOT INCLUDED
3. 4.DIN 9021 M8 washer –INCLUDED
4. 5.DIN 6334 M8 nut –INCLUDED
5. 6.ISO 7380 M8 screw –INCLUDED
6. 7.Plastic cover –INCLUDED
6.5. Fitting the unit, sloping, distances
If the unit is installed to ventilate a general use indoor environment, its interior design (only for floor-standing and under-ceiling
installation) ensures the transport of condensate to the required point without the need for additionally sloping the unit.
For all positions it is necessary to keep the unit slope towards the condensate outlet. Recommended sloping of the unit is:
-3 % (25 mm) for Floor-standing and under-ceiling position
-10 % and 12 % (75 mm and 100 mm) for Floor-standing flat position
To achieve acceptable acoustic values it is necessary to install air distribution with guaranteed acoustic attenuation. The
minimum distance of the nearest outlet from the ventilation unit in the supply line (behind supply fan) is 2-3 m. The line
before the first diffuser must be done with noise attenuation - fixed or flexible distribution silencer with sound dampening
insulation.
Under-ceiling
Floor-standing
Floor-standing flat

18
Recommended distances
min. 250
min. 75
min. 350min. 350
6.6. Fitting the condensate drain
The unit must have a condensate drain fitted in exhaust air outlet section i2 –see paragraph 6.3.
Condensate drains not in use must remain sealed.
The condensate drain line must be connected so that it does not get damaged during handling the unit. In under-ceiling
installation the condensate drain must be disconnected before opening the door of the unit.
For the position condensate drain in various configurations of ports see paragraph 6.3. –must be observed.
6.7. Connecting the condensate drain –under-ceiling installation
A condensate drain outlet from the door in
section i2, with condensate drain accessories
Connecting the condensate
drain with a 90°elbow and
connecting the line
Inserting the line and securing it with a
clip (the clip and the line is provided by
the plumbing installation company)
Connecting a straight condensate drain with
a sleeve to connect the line
Inserting the line and securing it
with a clip (the clip and the line
is provided by the plumbing
installation company)
6.8. Connecting the condensate drain –floor-standing
When the unit is to be installed in a floor-standing position, a condensate drain must be first prepared using the bushing provided
and silicon. All this must be done before putting the unit into operation; the equipment must be disconnected from power supply.
To install the condensate drain use only the points provided on the units in the form of visible recesses.
Holes for the fitting kit are provided and needn’t be cut out - just push out the plug being pushed out.
Fitting the bushing into the unit’s enclosure
Fitting

19
The point designed to fit the condensate drain with
accessories
Push out the middle part of the hole
using just your finger –the hole
below the outlines of the smaller
hole
Remove the plug
Insert the bushing, with the flange on the inside of
the unit
Put on a washer from the other side
and tighten with a nut –tightening to
be done only by hand
6.9. Connecting the condensate drain –floor-standing flat
When the unit is to be installed in a floor-standing flat position, a condensate drain must be first prepared using the bushing
provided and silicon. All this must be done before putting the unit into operation; the equipment must be disconnected from power
supply.
To install the condensate drain use only the points provided on the units in the form of visible recesses.
Holes for the fitting kit are provided and needn’t be cut out - just push out the plug being pushed out.
Condensate drain K1 - prepared as descripted in chapter 6.9.
Condensate drain K2 –the metal part should be prepared according to following instructions:
Accessories for making a drain
Remove the rubber plug from the
metal sheet (back side of the unit)
Silicone gasket put on the threaded sleeve
and insert it from the inner side of the unit
From the outside attach a pad and
then tighten whole set
Use a transparent, sanitary silicone
to seal the inner part side of the
metal sheet
View from the outer on installed condensate
drain tube - prepared for connection of tubes

20
6.10. Fitting the line on the sleeve
A condensate drain from the bottom of
the unit –use the shorter tube first
Direct / elbow condensate drain connection
for inserting the line
Insert the line and secure it with
a clip (the clip is provided by the
plumbing installation company)
6.11. Installation of additional SK cover
Cover SK (Silent kit) is used for a further reduction of sound pressure to the area by about 6 db. This is a separate part that is not
included HVAC unit itself.
Material: painted galvanized 0.75 mm plate in silver colour RAL 9006, kit is supplied with bolts for attaching the cover to the body
of the unit.
The cover consists of two pieces –top and bottom. Attached to the unit via a secured lid using anchor bolts.
Dimensions:
DV250 Entro
DV300/DV400 Entro
Installation:
Bottom section install before mounting the unit
According to filter covers place an upper and lower part
Push toward each other (the cover and the unit)
Tighten four screws for attaching the lid and upper part
of the unit SK cover