Xvent Xflat Instruction manual

Xvent s.r.o.
Poděbradská 289
53009 Pardubice
-
Trnová
Verze 001-GBR (25.8.2022) Page 1 z 6 D-502-0283
QUICK USER AND INSTALLATION MANUAL
Heat recovery unit
X
flat
Quick manual will guide you thru quick installation of the unit, but in any case, can not replace full manual. Full manual is available at out web
page, www.xvent.cz or you can download it by QR code.
Check, that in the spot where you will install the unit, there are not any electric wires, water, waste or gas pipes, which you can
brake during installation. Check, that the parameters of electric power network, you would like to connect the unit to, comply
with requests of the unit (production label).
Make sure that the installation of the unit will not interfere the static of the building and comply with all safety legislative requests.
Before starting the installation, check the possibility of connection to the sewage system for draining the condensate from the unit.
Read the QR code by smart
device enabling QR code
reading.
.
1) Usage
- The Xflat unit is an air-conditioning device using ventilation technology with
the recovery of heat (counter-current recovery exchanger) and humidity
(enthalpy exchanger) with the option of automatic control of air output using
AQS air quality sensors (accessories) or permanent ventilation - manual mode.
The unit also has a burst ventilation mode - BOOOST, which is started either on
the control panel or with an external switch EXT2 with a return flap, using e.g.: in
the toilet, in the bathroom. The regulation of the unit also enables remote
ON/OFF control using the external contact EXT1 or, with the help of the
accessory (XCONT-HUB-0A0), control using the superior BMS system (modbus
RTU protocol). - The Xflat unit also enables the fan offset function for use, for
example: in buildings with a fireplace. Air output, running time of BOOST mode
and fans offset can be adjusted separately in the customer menu.
- The unit can be used in spaces with a maximum nominal flow rate of approx. 150 m3/h (depending on the type) at 150Pa ext. stat. pressure.
- The unit is intended only for horizontal or vertical installation on the wall and on the ceiling, so that it is possible to ensure the supply of
fresh air and the extraction of waste air. The unit is equipped with three blind condensate outlets for each installation position.
- The unit is intended for indoor, covered and dry spaces with room temperature from +5 °C to +30 °C and with a maximum relative
humidity of 70% non-condensing.
The supplied fresh air temperature from the outside environment can be in the range from -20 °C to +40 °C (applies to the
version with preheating). If the temperature of the supplied air is lower than -20 °C, the unit may be automatically switched off
to protect against possible damage.
2) Technical parameters
- The unit must not be used to extract burning, glowing substances, flammable or explosive gases, aggressive media, liquids.
- The unit must not be installed close to the electricity socket, el. box, flammable materials, in environments with increased
occurrence or risk of explosion, flammable substances, with increased dust and in
environments with greater humidity.
Prohibited use of Xflat
3) Installation of Xflat
- Minimum installation distances
- Installation positions: The Xflat unit must be installed and put
into operation in accordance with the
general and locally valid safety
regulations, by a person with adequate
education, experience and knowledge
of the relevant regulations, standards
and possible risks and possible dangers,
or by a suitably trained service
technician. Failure to follow the
installation procedure may result in
damage to the unit, malfunction, and
possible injury to the user's health and
property.
- Neither the manufacturer nor the supplier is liable for damages caused by incorrect use of the units. The risk is borne by the user.

Xvent s.r.o.
Poděbradská 289
53009 Pardubice
-
Trnová
Verze 001-GBR (25.8.2022) Page 2 z 6 D-502-0283
- How to install Xflat unit
a) Remove the unit from its
b) Choose the installation position taking into account the location of the
condensate outlet. Align the anchor holes according to the dimensions on the
unit, drill and mount the unit leveled using suitable screws. Do not tilt the
unit.
- Before starting the unit for the first time or after a longer standstill, check the water trap. If you make a bend on the hose, pay
attention to the correct bend radius to avoid "breaking the hose". To extend the siphon hose, always choose a hose - pipe of the same
or larger diameter. Always choose the hose-pipe coupling with the smallest reduction of the inner diameter.
- All pipe connections that are connected to the unit must be sufficiently sealed so that there were no unwanted leaks and subsequent
problems, e.g.: condensation. the connected piping must be of the same diameter as the unit's connection sockets. If a pipe with a
smaller diameter is used, it may affect the air performance of the unit and thus reduce the lifespan of the fans.
f) Fill the siphon by water,
connect the hose to the outlet of
the unit and secure with a strap
h) connect the air ducts to
the Ø100mm nozzles
according to the purpose
c) cut off the edge of the condensation outlet and remove
any burrs
e) choose the correct siphon position
for connection to the sewer
min 150m
m
min 150m
m
g) connect the siphon
to the sewage system
i) seal and insulate the joint - use the
thermal insulation of the throats
min 150mm
INSULATION NECESSARY
d) create a siphon by attaching
the hose and tie straps
Ho
rizontal
on the wall
Verti
cal on the wall
Under the ceiling

Xvent s.r.o.
Poděbradská 289
53009 Pardubice
-
Trnová
Verze 001-GBR (25.8.2022) Page 3 z 6 D-502-0283
4) Electro installation – connection to the electric power network
- Before starting any installation work, make sure that the wiring box or mains power socket you want to use to connect the unit is
equipped with a protective (green-yellow) wire or contact (pin).
- If you use main plug to connect the unit, it must remain accessible at all times so that the unit can be safely disconnected from the
mains in the event of an emergency.
- The relevant current circuit must be protected by a maximum of 16 A in the electrical power distribution.
- The electrical connection of the unit to the network may only be carried out by persons qualified for this activity with a valid
authorization and knowledge of the relevant standards and directives.
- This unit belongs to the group of products with Y-type connection. If the power supply is damaged, it must be replaced by the
manufacturer, its service center or a similarly qualified person in order to avoid a hazardous situation.
-
The supply voltage to the unit 1~230V/50
-
60Hz must not be adjusted in any way, otherwise there is a risk of unit damage.
4)
Installation of controls for
Xflat
- The controller is connected to the regulation of the unit by connection and communication cable with a length of 3 m.
- The controller is designed to be installed on the wall in the following way:
A) Surface-mounted installation - cables into the rail
- For installation, use electrical cable rails and an electrical
installation surface-mounted box of the appropriate size with the
possibility of connecting cables from the side.
- Open the controller – picture a)
- Disconnect all cables from controller - spring clamps with manual
wire lock are used. Proceed with care to avoid damage.
- Install the controller box on the wiring box according to the
mounting holes.
- Drill the central hole in the back of the controller to pass the cables
- Pull the cable through and connect according to the attached
diagram in the controller box.
B) Concealed installation - cables in the wall
- The connection cables between the unit and the controller must be
part of the construction preparation - under the plaster. One end ends
at the installation location of the unit, the other at the location of the
controller in the flush-mounted box.
- Cables required for installation:
- 8-cores UTP cable without terminals - connection of power supply
and motor control
- 8-cores UTP cable with RJ45 8/8 terminals - communication
connection between the unit and the controller.
- Max length of connecting cables is 10m.
- Loosen the grommet nuts and unscrew the regulation cover plate
from the unit (see chapter 5.) and disconnect the connection and
communication cable according to the diagram
.
a) Open the controller
b) Controller dimensions
c) Connection diagram
ovladače
Connection cable
Communication cable
d) koncovky komunikačního kabelu
Pay attention to the correct connection - observing the positions of the cables and correctly inserting the cables into the.
terminals. There is a risk of unit malfunction
- Equip the communication cable
with terminals - RJ45 8/8 connectors
- The RJ connectors on the UTP cable
must be connected as a direct
connection (both connectors are
connected the same)
Direct connection
PRESS AND DRAG

Xvent s.r.o.
Poděbradská 289
53009 Pardubice
-
Trnová
Verze 001-GBR (25.8.2022) Page 4 z 6 D-502-0283
- Xhouse unit connection to the power - Connection of the unit in to the electric box
- Input wire is ready from the manufacturer for connection in to the
electric box.
- For connection of the income wire to the electric power network use
appropriate components. (IE connectors, spring clamps)
- Connection of the unit to the electric socket
- Income wire is possible to connect with plug with security connector
(pin) – this is not part of the delivery.
Installation of the income wire to the electric box or installation of the plug to the income wire and connection to the electric
power network has to be performed only by authorised person and inline with safety law instructions valid in the area of the
installation.
.
5) Controls – electro accessories to the Xflat
- For the correct operation of the unit (in manual mode), there is no need to connect anything else. It is ready for immediate use after installation
on the wall. For operation in automatic mode, you must connect the air quality sensor accessories CO2 (NL-ECO-CO2) or RH (NL-ECO-RH).
- Connection of electrical accessories
- Before connecting electrical accessories, always switch off the unit at the remote control and the main switch.
- Connect the electrical accessories in the control box. To connect accessories, use the membrane multi-through. To access the control
box, proceed as follows:
- Connection of CO2 (NL-ECO-CO2) and RH (NL-ECO-
RH) sensors
-
AQS sensors (AQS CO2
- Spring clamps with manual wire locking
are used to connect the individual
components. Both a licna-type conductor
(cable with a sleeve) and a solid conductor
(wire) can be installed in the terminals
with a cross-section ranging from 0.5 to
1.5 mm², exposed length 10 mm. Before
inserting the wire into the terminals, first
press the locking orange button. Then
insert the wire, release the lock and check
that the wire is properly secured by pulling
slightly on the clamp. If you need to
remove the wire from the terminal, the
procedure is the same. Choose the
optimal conductor cross-section according
to the length of the conductor route
.
a) loosen the grommet nuts
e) Connect the cable to the appropriate terminals in the motherboard according to the
- K It is possible to connect 2x AQS sensors (1xCO2 and 1xRH) to
the unit, which are used to measure the content of CO2
concentration and humidity – RH in the air at the place where the
sensors are installed. Thanks to the sensors, it is possible to
operate the unit in automatic mode, which automatically controls
the operation and air output of the unit according to the current
need in the given space where the sensors are installed. At the
same time, this method of management is the most efficient in
terms of economy of operation – it only ventilates as needed. If
necessary, it is possible to connect up to 8 sensors of one type to
the unit using the "PRO-SUM-08" accessory.
Sensor AQS
RH
Sensor AQS
CO2
b) unscrew the securing screws of the
regulation cover - remove the cover
c) pass the cable through the membrane
Terminal
bridge for
switching NC
and NO
switching logic
GREEN-YELLOW (PE) –
SECURITY WIRE
BLUE
(N)
–
NEUTRAL WIRE
BLACK/BROWN (L) – PHASE
WIRE

Xvent s.r.o.
Poděbradská 289
53009 Pardubice
-
Trnová
Verze 001-GBR (25.8.2022) Page 5 z 6 D-502-0283
- Technical parameters of AQS sensors for connection to the unit
o Power supply 24VDC
o Analogue output 0- 10VDC
o Max input 5W
o Analogue input resistance 100kΩ
- Functionality of the unit for connecting AQS sensors
- The unit responds with continuous control to the need for
ventilation triggered by the sensor in real time
- the switching concentration of the CO2 sensor is 800ppm, RH 65%
- cut-off concentration of the CO2 sensor is 700PPM, RH 60%
- External contact connection - EXT 1
- The regulation of the unit allows the connection of an external contact for remote switching on and off of the unit (remote ON/OFF control).
- The external contact is designed as potential-free, it can be switched by e.g.: magnetic contact, remote switch, time relay.
- Technical parameters of the external contact EXT 1
o Switching voltage 24 VDC / 5mA
o The contact can change the switching logic by switching the
terminal bridge to NC or NO switching logic (factory setting).
o
- Functionality of the unit when controlled by
an external contact EXT 2
- The external contact switches the unit on and
off (same functionality as the ON/OFF button
on the controller) with logical termination or
activation of all running processes at the time
of switching off, switching on.
The supply GND is common with the Analog input GND. If the connection is not followed, there is a risk of destroying the
control board.
- If the unit is turned on/off by an external contact, it can be turned off/on by the controller on the unit.
- Připojení externího kontaktu – EXT 2 - BOOST
- Regulace jednotky umožnuje připojení externího tlačítka (klapkový vypínač s automatickým vracením klapky – např.: zvonkové tlačítko s
vratnou pružinou) pro spuštění režimu nárazového větrání po nastavenou dobu
–
BOOST (dále jen BOOST)
pro použití např.: v koupelně
- Technical parameters of the external contact EXT 2 - BOOST
o Switched voltage 24 VDC / 5mA
o The external contact is designed as potential-free
o The factory setting is max. air output, run time 1 min.
- Functionality of BOOST mode – EXT 2
- An external switch turns on the BOOST mode at the set air
output and run time. After the running time of the BOOST
mode is over, the unit returns to the previous mode.
- To prematurely end the BOOST mode, hold the button for approx. 2 seconds. BOOST mode can also be turn on from the controller.
.
- Jednotku lze připojit k nadřazenému systému BMS pomocí komunikačního
protokolu modbus RTU pomocí příslušenství „XCONT-HUB“.
- Komunikační kabel připojte do ovladače do konektoru s označením BMS-
RS485, druhý konec zapojte do příslušenství „XCONT-HUB“ do konektoru
s označením BMS-RS485.
- Popis komunikačního protokolu je uveden v samostatném dokumentu
„D-502-xxx-Vxxx-xxx-MN-CENTRAL-MODBUS“.
- It is possible to connect an external electric heater with a maximum
power of 1500W, voltage 1x230V to the unit.
- The unit switches only the supply phase – potential (L-IN) to the
heater (L-OUT) in logic:
○ If the unit ventilates, the phase is switched - the potential is closed
- Connecting the unit to the superior BMS system
- Connecting an external electric postheater - POSTHEATER
○ If the unit is standing, the phase is switched - the potential is
open - the post-heating cooling function is active - 3 min
- the unit's regulation cannot detect the presence/absence of
reheating, therefore the reheating cooling function is always
active.
- It is possible to connect an external electric heater - preheating (see
accessory "XF-PH-100-03-1f") with a maximum power of 1500W, voltage
1x230V to the unit.
- Recommended heater power min 300W to 500W.
- The unit switches only the supply phase - potential (L-IN) to the heater (L-
OUT).
- The preheating switching logic is subject to the temperature on the
antifreeze sensor, which is located in the recovery exchanger in the exhaust air
branch.
o Switching temperature – 3°C (temperature on the antifreeze sensor).
o Opening temperature - 5°C – termination of anti-freeze protection –
- If the preheating is not enough, additional logics are triggered for preheating.
- Connecting an external electric preheater - PREHEATER

Xvent s.r.o.
Poděbradská 289
53009 Pardubice
-
Trnová
Verze 001-GBR (25.8.2022) Page 6 z 6 D-502-0283
- Block diagram of the connection of the Xflat unit
- further information on unit operation, service is given in the full manual or in Quick-first start-up (placed on the cover of the unit).
- Install the heater according to the heater manufacturer's instructions. The manufacturer of the unit is not responsible for
incorrect installation of pre-heating or post-heating or for damage to property or health.
- The supply wiring for powering the reheater must be handled by a separate supply including the switched phase controlled
by the unit, in no case may the reheater be powered from the unit.