jablotron Futura User manual

Heat recovery unit

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TABLE OF CONTENTS
Introduction ................................................................................................................................................................................ 2
1. Identification and application....................................................................................................................................... 2
2. Safety instructions............................................................................................................................................................3
3. Heat recovery operation principle...............................................................................................................................3
4. Structural parts of the heat recovery unit ..............................................................................................................4
4.1. Unit body .............................................................................................................................................................................................................................4
4.2. LED backlight .....................................................................................................................................................................................................................4
4.3. Filters and filter replacement ...................................................................................................................................................................................4
4.4. Enthalpy exchanger .......................................................................................................................................................................................................6
4.5. Fans........................................................................................................................................................................................................................................6
4.6. Display of the control....................................................................................................................................................................................................6
4.7. Summer by-pass .............................................................................................................................................................................................................6
4.8. Icing protection ................................................................................................................................................................................................................ 7
4.9. Operation together with fireplaces........................................................................................................................................................................ 7
5. Operation modes................................................................................................................................................................ 7
6. Functions of the heat recovery system.....................................................................................................................8
7. Control of the heat recovery system .........................................................................................................................9
7.1. Local control ......................................................................................................................................................................................................................9
7.1.1. Wall-mounted control.......................................................................................................................................................................................9
7.1.2. Optional accessories…....................................................................................................................................................................................10
7.1.2.1. Boost ventilation switch...............................................................................................................................................................10
7.1.2.2. CO2sensor............................................................................................................................................................................................10
7.2. Remote control...............................................................................................................................................................................................................10
8. Guarantee ............................................................................................................................................................................ 11
9. Disposal of the equipment ............................................................................................................................................ 11
Appendices
Appendice 1 Control – dimensions.......................................................................................................................................................................................12
List of figures
Obr. 1 Identification label..........................................................................................................................................................................................................2
Obr. 2 Illustrative diagram of the operation of the ventilation with heat recovery system..................................................................3
Obr. 3 System design..................................................................................................................................................................................................................4
Obr. 4 Button of initialization of new filters....................................................................................................................................................................5
Obr. 5 Filter replacement...........................................................................................................................................................................................................5
Obr. 6 Display of the control....................................................................................................................................................................................................6
Obr. 7 Switching between functions...................................................................................................................................................................................9
Obr. 8 Changing the operation mode................................................................................................................................................................................10
List of tables
Tab. 1 Symbols used....................................................................................................................................................................................................................2
Tab. 2 Colored LED backlight ...................................................................................................................................................................................................4
Tab. 3 Operation modes............................................................................................................................................................................................................. 7
Tab. 4 Time characteristic of the functions of the heat recovery unit ..............................................................................................................8

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Symbol Explanation
IMPORTANT WARNING!
CAUTION! IMMINENT DANGER!
(risk of injury of the user or the service staff;
risk of damage of the heat recovery equipment or risk of affecting
its proper function and operation).
DANGER! CAUTION! RISK OF HAND INJURY!
CAUTION! ELECTRIC EQUIPMENT!
Tab. 1 – Symbols used
Please, pay increased attention to the used symbols and in the interest of your safety and proper operation of the heat
recovery equipment follow the instructions that accompany every symbol.
Introduction
The User Manual deals with the Futura heat recovery system, which is designed for controlled ventilation and treatment
of the indoor environment of residential premises. The heat recovery system ensures recovery of heat and humidity, filters
supplied air, helps maintain optimum humidity and provides after-cooling by means of an integrated automatic by-pass in
summer, in the night mode.
Before you put the heat recovery system in operation, read the User Manual carefully. It will provide you with information
about the principle of heat recovery, structural design of the heat recovery system and its modes, functions, operation and
simple maintenance. Pay attention to all specifications and instructions included in it and follow them accordingly. This is
the only way of ensuring proper and safe operation of the heat recovery system.
This device complies with Directive of the Commission (EC) no. 1253/2014, requirements for the environment-friendly design
of ventilation units and Directive of the Commission (EC) no. 1254/2014.
ANY CHANGES RESULTING FROM TECHNICAL DEVELOPMENT ARE RESERVED. WE RESERVE THE RIGHT TO CHANGE THE CON-
TENTS OF THE MANUAL ANY TIME WITHOUT PRIOR NOTICE.
1. Identification and application
The Futura heat recovery unit represents HVAC equipment with heat recovery and active control of humidity recovery that
is designed for comfortable and energy-efficient controlled ventilation of family houses. The heat recovery unit provides
controlled ventilation of residential premises with the required ventilation volume of 110 –350 m3, at the outdoor air tem-
perature range from -19 °C to +45 °C.
Fig. 1 – Identification label

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2. Safety instructions
Always follow the safety instructions that are included in the User Manual. Failure to observe them may result in personal
injury or damage of the heat recovery system.
(1) The equipment has been developed and produced to provide controlled ventilation in residential buildings and premises.
(2) The equipment may only be used for purposes for which it has been developed and produced and for which it has
adequate technical capabilities – in line with the conditions defined by the manufacturer, its design, construction and
technical condition complying with safety regulations.
(3) The heat recovery equipment must be installed in compliance with general and locally valid safety regulations.
(4) The heat recovery equipment may only be installed, connected, commissioned and maintained by an authorized service
technician with respective professional qualifications. A service technician is a person with adequate qualifications,
experience and knowledge of respective regulations, standards as well as possible risks and dangers.
(5) The equipment may only be independently operated by physically and mentally apt persons that have thoroughly read
and understood the User Manual. The User Manual must be stored in an accessible place.
(6) Do not change or modify the heat recovery system in any way!
(7) Follow the time intervals for regular filter replacement.
(8) Do not repair the heat recovery equipment! If you find a defect or damage, make sure you switch off the unit and con-
tact a service technician immediately.
(9) We do not recommend you to leave the heat recovery system off for prolonged periods even in the periods of absence
of persons. Always let the system run at the lowest ventilation level or in the Automatic Mode.
Any maintenance activities, incl. filter replacement may only be carried out on the heat recovery equipment
if the unit has been disconnected from the electric mains!
During the replacement of filters do not reach into the filter space with your hand! Avoid the risk of hand injury!
The equipment must not be operated together with an open fireplace or with any fireplace without
its own air supply!
3. Heat recovery operation principle
The heat recovery system ensures continuous replacement of used air with fresh, clean air. Heat recovery takes place in
the exchanger, where the supplied air receives a part of heat and humidity from the exhausted air (mainly from the kitchen,
bathroom, WC etc.). So the fresh air, which continuously flows into the interior (living room, children’s bedroom, study etc.)
is thermally optimized and also filtered. The air that is exhausted from the interior is also filtered. The individual streams
are mutually separated so they will not get mixed.
An automatic by-pass is integrated in the heat recovery unit that enables after-cooling of the residential premises in the
summer months, in the night mode. In this season, heat transfer is not desirable so the by-pass channel leads air outside
the exchanger and prevents the colder night air from being heated up by the warm exhausted air.
The functional principle of heat recovery is illustrated in fig. 2.
AMBIENT
AIR
WASTE
AIR
FRESH
AIR
INDOOR
AIR
BYPASS
Fig. 2 – Illustrative diagram of the operation of the ventilation with heat recovery system

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4. Structural parts of the heat recovery unit
The heat recovery unit consists of the following structural parts:
Ambient air
Supply filter
Bypass servo
D servorying
Exhaust filter
Pwr Board
Power inlet
and fuse
Fresh
T+RH sensor
Indoor
T+RH sensor
Heating
Condensate drain
Power supply
Waste air Fresh air Indoor air
Ambient
T+RH sensor
IO board
Main board
Connectors
Waste
T+RH sensor
Fig. 3 – System design
4.1. Unit body
The outer jacket of the heat recovery unit is made of high-quality plastic. The internal structure is made of monolithic
polypropylene, which serves as heat and noise insulation without thermal bridges. The orifices of the heat recovery unit
(∅150 mm) for air supply and exhaust are situated in its top part.
4.2. LED backlight
On the front side of the unit there is a colored LED backlight that provides a clear indication of the current status of the
unit. During normal operation, green color pulses on the unit in regular intervals. A change of the backlight color indicates
the need to replace the filters, error statuses and active Bluetooth. The meaning of individual colors is explained in table 2.
RGB LED color Explanation
green Constant power, Automatic Mode, Stand-by
yellow Replace filter! The filter is clogged!
red Error! Fault!
blue Active Bluetooth
Tab. 2 – Colored LED backlight
Pay attention to changes of the colored backlight!
4.3. Filters and filter replacement
The heat recovery unit contains F7 filters at the air supply as well as exhaust. The necessity to replace the filters is indica-
ted automatically. The recommended interval of their replacement depends on the air quality in the environment where the
equipment is used (1× approx. 2 –6 months). The basic filtration can be supplemented with an optional carbon filter, which
is inserted directly into the unit under the supplied air filter.

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Users are alerted to the need to replace filters by:
a) a change of the colored LED backlight on the front side of the unit (see page 4, Tab. 2 – Colored LED backlight),
b) a message in the MyCOMPANY application.
Indication of a clogged filter: Filter
The heat recovery system must not be used without filters! During the replacement of filters and any mainte-
nance activity, the unit must be off!
During the replacement of filters do not reach into the filter space with your hand! Avoid the risk of hand injury!
During the replacement of the filters, proceed as follows:
(1) Switch off the heat recovery unit with the On/Off button.
(2) Remove the cover from the filter drawer and remove the filter out of the drawer.
(3) Insert the new filter into the drawer and fit the cover onto it. Be sure to insert the filters correctly, observing the arrows
indicating the air flow direction!
(4) Switch on the heat recovery unit with the On/Off button.
(5) Press the respective button on the control board (see page 5, fig. 4 – Button of initialization of new filters) or start filter
replacement from the MyJABLOTRON application.
Before the start of the initialization process, both the new filters must be inserted in the filter drawers and the
filter covers must be fitted!
LAN
X1
RS-485
X2
RS-485
GND GND GND
BST
GND
B- B-
AIN
LED NTC
A+ A+
DIN1
+24V +24V
DIN2
Button
X3
NTC
X4
Inputs/Outputs
X5 T1
Short press - activating initialization
of new filters
Fig. 4 – Button of initialization of new filters
After the initialization of new filters, the unit will return to the previous setting.
Fig. 5 – Filter replacement

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Clogged filters that are not replaced regularly can cause higher pressure losses, poor air flow, settling of dust
on the fan blades, which changes their characteristic, higher power consumption and higher power of the fan
motors. This results in excessive wear, imbalance of the system and generally improper operation of the heat
recovery system. In an extreme case this may lead to its irreversible damage and impaired functionality of
comfortable ventilation.
Replace the filters in regular intervals!
4.4. Enthalpy exchanger
In the heat recovery unit, an enthalpy counter-current exchanger is installed, which transfers not only heat, but also humi-
dity from the exhausted air, which means that it helps optimize the humidity level in the indoor environment.
4.5. Fans
The heat recovery unit contains two economical fans with an integrated electronic unit and the function of maintaining
a constant air flow.
4.6. Display of the control
The display of the control of the heat recovery unit can be divided into five sections with the set of individual symbols.
1
2
4
5
3
Fig. 6 – Display of the control
1 Symbols for the Days of the Week and Error Statuses (Error No. 1 – 9)
2 Symbols for functions of the heat recovery system, Indoor Temperature Setting, Time Schedule and Settings
3 Symbols for temperature values – Temperature IN and Temperature OUT (displayed in °C or °F), Humidity IN, Humidity
OUT (displayed in % rH)
4 Symbols for Switching off, Filters, Too Low Outdoor Temperatures, Warning
5 Symbols for Stand-by, Constant Power and Automatic Mode
4.7. Summer by-bass
The summer bypass consists of a supplementary bypass channel that directs the supplied air around the exchanger, namely
during colder summer nights. This prevents the warm exhausted air from transferring its heat to the colder air from the
outside and heating it up. The by-pass works in the automatic mode and it is controlled depending on the temperature
setpoint. The by-pass is not activated at a lower outdoor temperature than +15 °C, at active Drying, Circulation and Stand-
by. The automatic by-pass function can be enabled or disabled from a mobile application.

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4.8. Icing protection
The heat recovery system is technically as well as structurally ready for operation at temperatures below the freezing
point without the need of preheating, down to the temperature of -19 °C. During operation, when the outdoor temperatu-
res remain below the freezing point, the drying cycle is activated as necessary – based on the operation logic evaluation.
The interval between drying cycles is not fixed; it is activated approx. 1× every 3 days. In the period of extreme frosts, this
interval may get reduced.
Thanks to this function, no other frost protection in the form of electric preheating is necessary (see page 7, 5. Operation
modes).
4.9. Operation together with fireplaces
The heat recovery system is designed for operation together with a fireplace that is intended for passive buildings, has
a sealed fireplace insert and its own air supply.
The system must not be operated together with an open fireplace or with any fireplace without its own air
supply!
Use together with fireplaces is only possible if the relevant safety and fire regulations and standards are observed. This
operation requires setting and using the Overpressure function (see page 8, 6. Functions of the heat recovery system).
5. Operation modes
The user can set several modes of the heat recovery unit that influence its current output. In the default state, the unit
works in the Automatic Mode. The current mode of the unit can be changed in the Time Schedule or manually (control) The
operation modes of the heat recovery unit are shown in Tab 3.
Off
The unit is off, does not evaluate the connected peripherals, no temperature, humidity or CO2
measurements are carried out. It communicates with the Jablotron cloud in longer time intervals
(of several hours). The unit responds to the On command. The consumption in this mode is below
the threshold of 1 W. If the air temperature at the outlet of the heat recovery system decreases
below 0 °C, the Drying mode will be started and the unit can only be switched off after that.
If the unit is switched on during Drying, this mode must be completed first and the unit can only
be switched on after that.
Stand-by
The heat recovery system is in the standby mode, but the air exchange is not active. Information
from all the connected sensors is available, being continuously evaluated. Thanks to the connection
to the Jablotron Cloud, the heat recovery unit can be activated and its settings can be changed any
time. In the Stand-by mode the unit responds to the Boost function.
Constant Power
This is a mode where the user selects the fan power level in the range of values 1 –5. Depending
on the temperature and humidity setpoint, the system controls the by-pass flap and connected
peripherals. It controls turning of the heat exchanger flaps and the drying flap based on the
actual temperature and humidity.
Automatic Mode
Default mode of the heat recovery unit. This is a mode that uses information from the connected
CO2sensors and controls the fan power based on the current values. The ventilation power
is adapted to the requirements for quality of the indoor environment. The unit remains in this
mode until it is switched to the Time Schedule mode.
Time Schedule A mode where the user adjusts the fan power level in the range of values 1 (minimum)
– 5 (maximum), Stand-by and Automatic Mode.
Drying
A mode started automatically to remove moisture from the heat recovery unit. The drying takes
3 hours and the flaps of the heat exchanger are further turned over in intervals determined
by the dew point temperature. During this mode, the user comfort is not reduced; the air that
is supplied to the indoor space is warmer than the air that is exhausted. If the Boost function
is activated during drying, the forced exhaust time is limited to 2 min.
Too Low Outdoor
Temperature
A mode started automatically when the outdoor temperature drops below -20 °C. Drying is
carried out while the air exchange and ventilation are suspended.
Tab. 3 – Operation modes

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6. Functions of the heat recovery system
The heat recovery unit works in certain modes and functions whose activation and start is accompanied by lighting up of
the respective symbol. The following functions of the heat recovery unit are distinguished:
Boost (forced ventilation)
A top power (5) function used if fast, forced ventilation of the indoor premises is required. The unit is temporarily switched to the
maximum level, the fans working at the top power. This function is available in any mode except the Off mode. It can be activa-
ted from the cloud (for any time), from the LCD control (for a preset value) or with a button connected to the unit (two preset
values for short and long pressing). From the application, short pressing activates the Boost function for a shorter preset time;
after longer pressing, user time selection options are displayed. If Boost is active, the time remaining until the expiration of this
function is displayed next to the respective symbol. After expiration of the given time, the unit will return to the previous mode.
Night Mode
A reduced power function used at night. The unit is switched to the minimum level (1), the fans working at the lowest power
setting. After expiration of the given time, the unit will return to the previous mode.
Holiday
A reduced power function used in periods of absence of the users of the premises. The unit is switched to the minimum level (1), the
fans working at the lowest power setting. On activation of this function, the user sets the return day and time (dd.mm.yy hh:mm).
Party
An increased power function used mainly when a higher number of persons are present on the indoor premises. The unit
works at the 4th power setting. After expiration of the set time the unit will return to the previous mode.
Circulation
A function used if it is necessary to prevent flowing of outdoor air into the indoor space. The indoor air is circulated.
On setting this function, the user sets the duration of this function.
Overpressure
A function designed for simultaneous use with a fireplace and only available from the MyJABLOTRON application. The unit
changes the ratio of the fan speeds for the aspirated and exhausted air. The fan exhausting air from the indoor space works
at a lower power than the fan that supplies air. This prevents combustion products and smoke from getting into the interior.
Functions Duration Increment Default value
Boost 5 min – 2 h 5 min set value
Overpressure 5 min – 2 h 5 min 30 min
Night Mode 15 min – 15 h 15 min 8 h
Holiday 1 day – 1 month 1 h 7 days
Party 15 min – 8 h 15 min 2 h
Circulation 15 min – 2 h 15 min 1 h
Tab. 4 – Time characteristic of the functions of the heat recovery unit
Heating
The heat recovery unit can heat the supplied fresh air by means of an internal heater. The heater output is controlled based
on temperature of exhaust air. This feature can be turned on or off from a mobile application.
Comfort heating
When the heating is switched on, the temperature of the supplied air is heated to the same temperature as the exhaust
air with the internal heater.