Aereco DXA 230 PREMIUM Technische Daten
INSTALLATION AND MAINTENANCE INSTRUCTION (ENGLISH VERSION)
dx system
DXA 230 PREMIUM
Heat recovery unit with demand control for cupboard installation
TF6400_A Aereco S.A.
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TF6400_A Aereco S.A.
1. Introduction 3
1.1. Warnings 3
1.2. Pictograms 3
2. Description 4
2.1. General information 4
2.2. Construction / Dimensions 6
2.3. DXA Assembling 6
3. Installation 7
3.1. Location of the installation 7
3.2. DXA Unit 7
3.2.1. Location 7
3.2.2. Accessibility 8
3.2.3. Fixing of the DXA Unit 8
3.2.4. Duct connections to the DXA Unit 10
3.2.5. Evacuation of condensates 11
3.3. Exhaust compensation valve (MCP 125) 12
3.4. Defrosting 13
3.5. Sensors 14
3.5.1. Presence sensors (DX S-PRE) 14
3.5.2. C02sensors (DX S-CO2) 14
3.6. DXA user’s interface 15
3.7. Special care for the ductwork 16
3.8. Fire protection 16
4. Electrical connections 17
4.1. Electrical connection on the DXA Unit 18
4.2. Electrical connection of the defrosting 19
4.3. Electrical connection of the condensate pump (optional) 19
5. Starting and settings of the DXA 20
6. Maintenance 20
6.1. Regular maintenance of the installation 20
6.2. Fuse 20
6.3. Replacement of supply cable 20
6.4. Power supply and motor material protections 21
6.5. Filters 21
7. Troubleshooting 22
8. Acceptance of works 23
8.1. Visual inspection 23
8.2. Measurements 23
9. Specific recommendations for airtightness and insulation of the installation 24
9.1. Insulation of the installation 25
9.2. Airtightness of the installation 25
10. Supply and exhaust units 27
10.1. Supply units 28
10.2. Exhaust units 28
10.3. Fresh air inlet and exhaust air outlet 29
11. Environmental concerns 29
12. Warranty 29
13. Conformity and standard 29
14. Characteristics 30
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1.1. WARNINGS
PLEASE READ THE FOLLOWING INSTRUCTIONS BEFORE THE
INSTALLATION:
In case of non-compliance with advice and warnings contained
in this manual, the manufacturer can not be considered
responsible for damages to persons or property.
The manual describes how to install, use and maintain correctly
the appliance. The only way to ensure the eciency and longevity
of the product is to comply with these requirements.
Do not use this appliance for any applications for which it is not
intended.
The system must be installed by experienced contractors, trained
in the specificities of the process and having the necessary skills
in aeraulics and electricity.
The use of gloves to carry on the installation is recommended.
After unpacking the appliance, make sure it is not damaged. Any
functional default must be reported to your reseller.
The use of an electrical appliance implies the following
fundamental rules:
· Do not touch the appliance with a wet or damp body (hands, feet,
etc.).
· This appliance is not intended for use by persons (including
children) with reduced physical, sensory or mental capabilities,
or lack of experience and knowledge, unless they have been
given supervision or instruction concerning use of the appliance
by a person responsible for their safety. To avoid any risk, do not
allow them to play with the appliance.
· The electrical installation and electrical connections must
be carried out by a qualified technician according to the
manufacturer’s instructions and in compliance with the
characteristics listed on the nameplate of the unit.
· Before carrying out any operation on the appliance, unplug or
disconnect it from the power supply, and ensure it can not be
accidentally restored.
· Power cable modification or replacement must only be carried
out by qualified personnel or by After-sales Service in order to
avoid any accident.
· Children being supervised not to play with appliance.
1.2. PICTOGRAMS
Warnings
Risks of:
· Appliance damage
· Bad eciency and longevity of the appliance.
Risk of electric shock.
Electrical component: ground.
1. INTRODUCTION
This document presents the installation and maintenance schemes for the whole system.
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The Heat Recovery Unit : DXA Unit
The DXA has been specifically designed for
wall or cupboards installation. Thanks to
its wellfitted dimensions, the DXA can be
installed in technical rooms, wallmounted.
A creamy white metal sheet covers the front
face of the the DXA which allows it to be
unnoticed as a technical equipment. The DXA
unit is compatible with two demand control
strategies used in the DX System “Premium”
and “Excellence”.
2. DESCRIPTION
2.1. GENERAL INFORMATION
The DX System is a range of smart heat recovery ventilation systems that continually supply pollen-free and dust-free preheated fresh air to living areas,
ensuring a comfortable feel-good climate.
The DXA is a heat recovery unit with demand-controlled airflows for vertical installation (on the wall) in the apartment or in the house, from 2to 5 main
rooms, and from 1 to 5 technical rooms (kitchen, bathroom, others wet rooms). The dwelling has to be limited to 2 floors (1 ground floor and 1 floor
maximum), and has a maximum surface of 210m². This HRVsystem can also be used in oces, hostels, etc., if the required airflow is in accordance
with the one oered by the system.
General working of the DX System, Premium Version
The DXSystem is comprised of a heat recovery unit (DXA Unit 1 ) con-
nected to exhaust and supply ductworks. The counter-flow heat exchanger,
integrated into the main unit, ensures the recovery and transfer of most of
the energy from the exhaust air to the supply air, thus limiting the energy
required to heat the fresh air.
Airflows are automatically controlled according to the needs of each
dwelling’s room: a room by room DCV is ensured on the exhaust side while
on the supply side, airflow are managed globally by the mean of one or
several indoor air quality sensors 4. Preheated 8fresh air is supplied
3in the bedrooms and in the living room. Stale air is extracted 5from
the kitchen, bathroom and WC. To manage supply airflows, one or several
C02or presence sensors 4drive the exhaust compensation valve. If
several sensors are connected, a weighted average of the ventilation need
is calculated by the system to adap the airflow. With this strategy, the
exhaust airflow 5increase depending on the sensors measurement,
which will drive consequently the supply airflows. Supply airflows, as
they are distributed through a passive distribution box 2, are identical
in all the dierent main rooms (to the nearest drop pressure losses). On
the exhaust side, the exhaust units 5 adjust automatically the airflow,
according to parameters read by various sensors: humidity (used in the
kitchen, in the bathroom and in WC), presence (used in WC). Versions
with switch, presence, remote, CO2or VOC sensors can also be used for
exhaust units. In order to have a balanced system, supply airflows are
similar to exhaust airflows.
The use of an exhaust compensation valve 7 , connected to a specific
supply unit 6 , is also a solution to increase the airflows. This scenario
is used in order to get a very ecient over-ventilation mode, also called
free-cooling mode.
Supply airflows and exhaust airflows are measured by the use of accurate
pressure sensors placed in the heat recovery unit. This allows to calculate
with a high accuracy supply and exhaust airflows, without influence of
clogging filters or ductwork pressure drop. It ensures the highest eciency
for the system. So that, energy savings are at their maximum.
CO2 detection
Based on the level of CO2in the room, a
consequence of people occupancy, CO2
sensors are a really good indicators to
modulate the supply airflows, and allow reliable
measurement of the concentrations of CO2
in a zone. The analysis principle consists in
measuring the absorption of infrared light in
order to determine the concentration in a room.
This method gives a very accurate response
and is not aected by any other pollution
(humidity, dust, etc.).
Presence detection
The presence sensors located in the main rooms
(at least 1 sensor in one or several main rooms)
send the information to the system (presence
detected or not) with a timer that depends on
the period through luminosity measurement
(day or night). This timer keeps the detection
at the maximum level during 20 or 45 minutes
after the last detection, to optimize the quality
of detection. Timer day = 20 min ; Timer night
= 45 min. When there is detection, the local
supply airflow is increased to ensure the best
air quality. If there is no detection, the local
supply airflow is reduced to optimize energy
savings.
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TF6400_A Aereco S.A.
1
3
33
3
8
34
9
9
10
4
4
4
2
5
76
5
Typical apartment equipped with the DXA Premium system
DXA Unit
1Distribution box (not specific)
2
Passive distribution box for supply airflows (no control)
BXC b
6
Exhaust unit for balance
Interface
Heat recovery unit with balanced demand controlled airflows
Preheater
8
Galvanised steel body
with built-in resistance
MCP 125
7
Exhaust compensation valve
S-CO2
4
CO2 sensor
SDC 100
3
Supply unit
S-PRE
Presence sensor
Air intake and outlet grilles
9
BXC
5
Exhaust units (various sensors)
RJ 12 - RJ 45 cables
Acoustic attenuation
10
List of components
supply aiflows
exhaust aiflows
technical room
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TF6400_A Aereco S.A.
Dimensions of DXA Unit (mm)
2.2. CONSTRUCTION / DIMENSIONS
DXA Unit 230m3/h– Heat recovery unit
ø160 ø160 88
101
166
164
210
248 151 155
1189
240
R2,50
80
1184
130
545
40
482
545
138 118
151
R80
248 155
554
R80
101
See the characteristics of the DXA Unit system on page 30
· Envelope in EPP, covered by a white creamy metal sheet.
· 2 low energy consumption fans driven by EC (electronic commutation) motors (supply air and
exhaust air).
· 2 F7 anti pollen filters for the fresh air.
· G4 filter for the exhaust to protect fans and the exchanger.
· Continously checking of filter clogging, and warning for filter change.
· High eciency heat exchanger with plastic plates, washable.
· Intelligent electronic control unit of the heat recovery, with integrated or remoted control interface.
· Integrated bypass and free-cooling automatically controlled.
· Built-in siphon or condensate pump to evacuate the condensate.
2.3. DXA ASSEMBLING
When delivered, the DXA Unit is furnished with 4 lipseals spigots.
Before removing the 4 plastic caps, pull out carefully the staples
with a screwdriver to not dammage the EPP material. No need to
seal the spigots once they are pushed in the inlets and outlets of
the DXA, the lipseals make it already airtight.
Assembling of the DXA spigots
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wall
(side view)
wall (top view)
3. INSTALLATION
3.1. LOCATION OF THE INSTALLATION
The unit must be installed into the heated space, in parts of the dwelling relatively
insensitive to noise, not in the unheated space (attic, etc.). Upper and lower
temperature limits for the main unit are 5°C and 50°C
Ductwork should be installed in the heated space. If not, they must be insulated
with 50mm minimum of glass wool (or equivalent). The non compliance with these
conditions leads to the degradation of the heat recovery performance.
Features and uses
DXA Unit CO2sensor Exhaust compensation valve
Max. altitude of the product installation 2000 m 2000 m 2000 m
Temperature range of the installation place 5°C – 50°C 5°C – 40°C 5°C – 40°C
Humidity range of the installation place 5% - 95% Max. 80% at 31°C, linear
decrease up to 50% at 40°C. 5% - 95%
3.2. DXA UNIT
The caps on the DXA Unit must stay during the entire duration of the work, in order to
keep dust and pollution from getting into the boxes.
3.2.1. LOCATION
Before the installation, be sure of the solidity of the wall where you plan to install the DXA
Unit.
· Weight of DXA Unit = 23 kg
The DXA Unit must be positioned exactly vertically (max 1° tolerance).
The non compliance to this requirement may lead to serious problems of condensate
evacuation.
Positionning of the DXA Unit
D = 5 mm
D = 5 mm
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TF6400_A Aereco S.A.
3.2.2. ACCESSIBILITY
The DXA Unit, as well as the distribution box, must be positioned so that it is accessible for
the maintenance and in case of access or removal from the wall / false ceiling.
Recommendation for access hatches
The electrical connections must be easily accessible to be able to disconnect the DXA Unit from
the supply before any operation on the appliance. The circuit-breaker must be easily identified and
accessible.
3.2.3. FIXING OF THE DXA UNIT
The DXA Unit is fixed on a wall thanks to the use of two metal brackets, specific to Aereco. The first
bracket is fixed in the DXA while the second bracket is screwed in the wall. The two brackets are
assembled one within the other.
Quick suspension system proposed by Aereco
D > 15 cm
D > 5 cm
D > 5 cm
Wall
D > 2 cm
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TF6400_A Aereco S.A.
Installation of the fixing system
1
5 6
7 8
x2 x12 x12 x12
DXA Unit DXA Unit
2 3 4
Ø6 mm
Note : For plasterboard walls, molly metal anchors may be used instead of provided plastic anchors.
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TF6400_A Aereco S.A.
3.2.4. DUCT CONNECTIONS TO THE DXA UNIT
The connections to the DXA Unit are all in Ø160 mm. Labels on the unit identify the 4 ducts to be
connected (fresh air, used air, supply air, exhaust air). Outdoor fresh air and used air ducts must
be insulated.
Fresh air
(outdoor to indoor)
Used air
(indoor to outdoor)
Fresh air supply
(outdoor to indoor)
Exhaust air
(indoor to outdoor)
DXA top view
Each supply unit can be connected to a distribution box by a Ø100mm for rigid duct or
by a Ø75mm duct for semi-rigid duct. Each semi-rigid duct cannot aord an airflow
bigger than 30m3/h.
1Ø100 or Ø75 mm
2Ø100 mm or Ø125 mm
3Ø160 mm
4Ø160 + 50mm insulation
Supply: rigid or semi-rigid duct
+ flexible connection to the unit (1m max)
(avoid noise in the room)
Exhaust air: rigid (avoid pressure drop)
or semi-rigid duct
Air intake and air outlet: insulated rigid
duct (avoid pressure drop and condensation)
Duct diameters and recommendation concerning the type of ducts
1
1
1
1
2
2
2
3
4
4
SDC100 SDC
100
SDC100
SDC100
BXC BXC
BXC
compensation
to exhaust air outlet
to fresh air inlet
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