Nuaire Group MRXBOX95-WALL Instruction Manual

MRXBOX95-WALL
Mec anical Ventilation Unit wit
Heat Recovery for Wall Mounting
Installation and Maintenance
Unit must not be switc ed off during normal operation, t e
product is designed to run continuously.
1.0 Introduction
MRXBOX95-WALL is designed to provide mec anical supply
and extract ventilation wit eat recovery.
T e unit is fitted wit two independent fans. Eac fan as full
speed control for background and boost ventilation rates as
well as a run-on timer facility. To recover eat from t e extract
air t e eat exc anger block is utilised. T is eat exc anger
can recover up to 95% of t e normally wasted eat.
2.0 Installation
Installation must be carried out by competent personnel in
accordance wit t e appropriate aut ority and conforming
to all statutory governing regulations.
All mains wiring must be in accordance wit t e current I.E.E.
Regulations, or t e appropriate standards. Ensure t at t e
mains supply (Voltage, Frequency and P ase) complies wit
t e rating label.
Please note a clear working space is required around t e
installed unit to allow t e cover to be removed and provide
sufficient access for maintenance suc as filter c ange.
T e fan must be installed indoors, on a wall away from direct
sources of frost, eat, water spray or moisture generation. For
a vibration-free result t e unit must be mounted to a solid wall.
T e unit is designed for wall mounting only.
1. One part of t e mounting bracket s ould be offered up to
t e wall, ensuring it’s located orizontally. Mark t e fixing
points t roug t e pre drilled oles in t e bracket and
install wit screws (by ot ers), ensuring t e interlock side
is at t e top (fig. 2).
2. Fix t e remaining part of t e bracket to t e unit using t e
M6 screws ensuring t e interlock side is at t e bottom (fig. 3).
3. Install t e unit on t e wall by ensuring t e bracket on t e
unit interlocks over t e wall mounted bracket (fig. 4).
2.1 Condensate Drain
1. Remove t e front cover from t e unit.
2. Insert t e drain connector t roug t e base of t e unit from
outside. T e condensate must be disc arged under a water
level in a U-trap drainpipe or an alternative drain met od
w ic acts as an airlock.
3. Ensure t e drain connector forms a seal wit t e drain tray
applying sealant if necessary. T is condensate disc arge
connection is suitable for 21.5mm dia. overflow pipe.
Solvent cement s ould be used to make t e joint.
4. Pour water into t e drip tray to create an air trap.
Nuaire Limited Western Industrial Estate Caerp illy United Kingdom CF83 1NA
T: 029 2085 8400 F: 029 2085 8444 E: [email protected] W: www.nuaire.co.uk
102. 07. 15. Leaflet Number 671437
Extract air
from house
Intake air
from outside
Exhaust air
from house
to outside
Supply air
to house
Figure 1. Airflow t roug unit.
Te EMC Directive
2004/108/EC
T e Low Voltage
Directive
2006/95/EC
Figure 3. Fixing t e mounting
bracket to t e rear of unit.
Figure 4. Mounting t e unit
on t e wall mounted bracket.
Figure 5. Condensate pipe connection to unit and a typical example
of a “U” trap drainpipe.
Figure 2. Fixing t e mounting bracket to t e wall.
21.5mm dia. condensate pipe.
See point 3 above for sealing.
5o Drop
Collar

Any air intake terminal MUST be installed in accordance
wit t e appropriate regulation.
As a guide, t e BS5440 series of Britis Standards
deals wit t is issue and currently states t at an air
intake must be at a minimum distance of 300mm from
a gas boiler balanced flue. Installers are advised to
be aware of t e requirements of t is standard w en
installing ‘t roug t e wall’ supply air ducting.
Similarly, supply and extract air grilles s ould be at
least 300mm apart.
2.3 Ducting
T e use of flexible ducting must be kept
to a minimum and s ould always be
pulled taut.
To prevent condensation on t e outside
of t e outside air inlet duct and t e air
outlet duct from t e MRXBOX95-WALL,
t ese ducts s ould be insulated.
Ducting must be installed in suc a way
t at resistance to airflow is minimised.
A minimum distance of 200mm between
t e appliance and any bends in ductwork
is recommended.
Ducting joints must be sealed wit ducting
tape and or silicone type sealant.
202. 07. 15. Leaflet Number 671437
Installation and Maintenance MRXBOX95-WALL Mec anical Ventilation wit Heat Recovery
Mounting bracket
on wall and rear of
unit.
Figure 6. Main unit components and spigot location.
Unit eat
exc anger pod.
598
435
VIEW FROM FRONT
WITH COVER REMOVED
SIDE VIEW
Mounting
bracket
285
VIEW FROM TOP Mounting bracket
21.5mm dia. condensate drain
2.2 Extract/input areas
T e unit is designed to extract air from
all wet rooms e.g. bat room, kitc en,
en-suite, utility room (wit sink).
WC’s do not need to be ventilated
if openable windows are fitted.
Supply air s ould be to all abitable
rooms e.g. bedrooms and lounge.
Extract / input grilles s ould be
adjustable valve types (not supplied).
Removable access cover.
Two removable
G2 filters.
1
2
4
3
Spigot Location and Ducting references (see figure 6)
Spigot 1. 125mm dia. = extract air from dwelling.
Spigot 2. 125mm dia. = ex aust air to outside.
Spigot 3. 125mm dia. = intake air from outside.
Spigot 4. 125mm dia. = supply air to ouse.
3.0 Dimensions
Condensate
tray.

302. 07. 15. Leaflet Number 671437
Installation and Maintenance MRXBOX95-WALL Mec anical Ventilation wit Heat Recovery
Fuse 2A
Unit serving Kitchen and Bathroom
MAINS
230V
50Hz
Room
light
Light
switch
(Double
Pole)
N
L
SL
N
L
Fan
Unit
3 Pole
isolator
Kitchen switch
Unit serving Kitchen and two Bathrooms
Fuse 2A
MAINS
230V
50Hz
Room
lights
Light
switches
(Double
Pole)
N
L
SL
N
L
Fan
Unit
3 Pole
isolator
Kitchen switch
Figure 8.
Figure 9.
For good EMC engineering practice, any sensor cables
or switc ed live cables s ould not be
placed wit in 50mm of ot er cables or on t e same
metal cable tray as ot er cables.
4.0 Electrical Connection Please note: t e electrical connection of t e unit must be be carried
out by a qualified electrician.
Electrical details:-
Voltage: 240V 1p 50Hz
Consumption: 75W (max) 0.6 amps
Fuse rating: 3 Amp
NOTE T is unit must be eart ed
SLNL
Connections for
optional controls
Volt free relay
contacts I Run
Fan connections
230V IN
50Hz
Mains
Earth point
Fault
Internal wiring
Figure 7a. Power supply PCB.
230V in, 24V dc out.
Figure 7b.
Control PCB. 24V

402. 07. 15. Leaflet Number 671437
Installation and Maintenance MRXBOX95-WALL Mec anical Ventilation wit Heat Recovery
Electrical connection cont.
Figure 10. Detail of unit control on front panel.
Optional Connections
Ecosmart control (see figure 7b)
(a) J11/12/13
Te IDC plug-in connectors are provided for t e connection of
compatible sensors.
NOTE: Do not run t e data cable in t e same conduit as t e
mains cable and leave a 50mm separation wit any power
cables.
(b) Volt Free Relay Contacts
Note t at t e volt free contacts are not fused. If t ese are used
to power any external equipment, t e installer must provide
adequate fusing or ot er protections. T ese contacts are rated
at 5A resistive, 0.5A inductive.
Run connections (J5) - T ese contacts are closed w en t e
fan is running.
Fault connections (J7) - No fault = t e contacts are closed.
Fault = t e contacts are opened (t is includes no power supply
at t e unit).
(c) Data Cable installation
A 4-core data cable is used to connect devices suc as sensors
to t e fan and for interconnecting multiple fan units.
Do not run data cable in t e same conduit as t e mains cables
and ensure t ere is a 50mm separation between t e data cable
and ot er cables. T e maximum cable run between any two
devices is 300m w en it is installed in accordance wit t e
instructions.
Please note t at t e total data cable lengt used in any system
must be less t an 1000m. Keep t e number of cable joints to a
minimum to ensure t e best data transmission efficiency
between devices.
LED Indication
PWR GREEN: Power on and OK,
RED: Standby LED on w en fan is not running.
As t e unit runs continuously t is LED s ould
be off. If it is illuminated locate t e trickle
switc and c ange its position.
Fan 1 GREEN: Fan 1 is running, RED: Fan 1 faulty.
Fan 2 GREEN: Fan 2 is running, RED: Fan 2 faulty.
5.0 Ancillaries
Passive Infra red detector MRXBOX95-PIR
External Humidity sensor MRXBOX95-HUM
Remote Fail Indicator MRXBOX95-RFI
6.0 Commissioning
1. For t e required airflow rates refer to t e design
specification for t e property or refer to Building
Regulations Part F.
2. T e unit is supplied wit control of bot t e normal
airflow and boost airflow. (see figure below).
3. Commissioning s ould be carried out using a moving
vane anemometer in conjunction wit a ood.
4. Once commissioned t e ouse owner / tenant s ould
be informed t at t e unit s ould not be adjusted as it
will ave a detrimental effect on t e indoor air quality
and could result in condensation and mould growt .

5
Isolation - Before commencing work make sure t at t e unit,
switc ed live and Nuaire control are electrically isolated
from t e mains supply and switc ed live supply.
7.0 Maintenance/Cleaning
1. We recommend t at t e two G2 fiters are inspected after
6 mont s, and replaced every 12 to 18 mont s.
2. Remove t e front cover and slide out t e filters w ic are
fitted eit er side of t e eat exc anger, return or replace
t em as necessary.
3. Inspect t e eat exc anger every 5 years. Generally c eck
for damage and security of components. Refit cover.
4. Inspecting motors. Motors can be accessed t roug
removal side panels.
02. 07. 15. Leaflet Number 671437
8.0 Replacement of Parts
S ould any component need replacing Nuaire keep extensive
stocks for quick delivery. Ensure t at t e unit is electrically
isolated, before carrying out any work.
Wen ordering spare parts, please quote t e serial number
of t e unit and t e ARC number of t e purc ase if possible.
(T is information will be available on t e fan label).
9.0 Warranty
T e 5 year warranty starts from t e day of delivery and
includes parts and labour for t e first year and parts only for
t e remaining 4 years. T is warranty is conditional on planned
maintenance being undertaken.
10.0 Service Enquiries
Nuaire can assist you in all aspects of service. Our Tec nical
Support department will be appy to provide any assistance
required.
Telep one 029 2085 8400
Installation and Maintenance MRXBOX95-WALL Mec anical Ventilation wit Heat Recovery
Tec nical or commercial considerations may, from time to time, make it necessary to alter t e design, performance and
dimensions of equipment and t e rig t is reserved to make suc c anges wit out prior notice.

602. 07. 15. Leaflet Number 671437
We declare t at t e mac ine named below conforms to t e requirements of
EC Council Directives relating to Electromagnetic Compatibility and Safety
of Electrical Equipment.
Designation of mac inery: MRXBOX95-WALL
I & M Serial No.: 671437
Mac inery Types: Mec anical Ventilation wit
Heat Recovery
Relevant EC Council Directives: 2004/108/EC (EMC), 2006/95/EC
(Low Voltage Directive)
Applied Harmonised Standards: EN55014-1, EN55014-2, EN61000-3-2,
EN61000-3-3, EN60335-2-80
Basis of Self Attestation: Quality Assurance to BS EN ISO 9001
BSI Registered Firm Certificate No. FM 149
Signature of manufacture representatives:
Name: Position: Date:
1) C. Biggs Tec nical Director 29. 12. 09
2) A. Jones Manufacturing Director 29. 12. 09
Nuaire Ltd,
Western Industrial Estate,
Caerp illy CF83 1NA.
Note: All standards used were current and valid at t e date of signature.
To comply wit EC Council Directives 2006/42/EC Mac inery Directive and
2004/108/EC (EMC).
To be read in conjunction wit t e relevant Product Documentation (see 2.1)
1.0 GENERAL
1.1 T e equipment referred to in t is Declaration of Incorporation is supplied by
Nuaire to be assembled into a ventilation system w ic may or may not include
additional components.
T e entire system must be considered for safety purposes and it is t e
responsibility of t e installer to ensure t at all of t e equipment is installed in
compliance wit t e manufacturers recommendations and wit due regard to
current legislation and codes of practice.
2.0 INFORMATION SUPPLIED WITH THE EQUIPMENT
2.1 Eac item of equipment is supplied wit a set of documentation w ic provides
t e information required for t e safe installation and maintenance of t e
equipment. T is may be in t e form of a Data s eet and/or Installation and
Maintenance instruction.
2.2 Eac unit as a rating plate attac ed to its outer casing. T e rating plate
provides essential data relating to t e equipment suc as serial number, unit
code and electrical data. Any furt er data t at may be required will be found
in t e documentation. If any item is unclear or more information is required,
contact Nuaire.
2.3 W ere warning labels or notices are attac ed to t e unit t e instructions given
must be ad ered to.
3.0 TRANSPORTATION, HANDLING AND STORAGE
3.1 Care must be taken at all times to prevent damage to t e equipment. Note t at
s ock to t e unit may result in t e balance of t e impeller being affected.
3.2 W en andling t e equipment, care s ould be taken wit corners and edges and
t at t e weig t distribution wit in t e unit is considered. Lifting gear suc as
slings or ropes must be arranged so as not to bear on t e casing.
3.3 Equipment stored on site prior to installation s ould be protected from t e
weat er and steps taken to prevent ingress of contaminants.
4.0 OPERATIONAL LIMITS
4.1 It is important t at t e specified operational limits for t e equipment are
ad ered to e.g. operational air temperature, air borne contaminants and unit
orientation.
4.2 W ere installation accessories are supplied wit t e specified equipment eg.
wall mounting brackets. T ey are to be used to support t e equipment only.
Ot er system components must ave separate provision for support.
4.3 Flanges and connection spigots are provided for t e purpose of joining to
duct work systems. T ey must not be used to support t e ductwork.
4.4 In t e event of RF interference t e fan may c ange speed. T is is normal and will
ave no adverse effect on t e fan. T e speed will return to normal once t e
interference as subsided.
5.0 INSTALLATION REQUIREMENTS
In addition to t e particular requirements given for t e individual product, t e
following general requirements s ould be noted.
5.1 W ere access to any part of equipment w ic moves, or can become electrically
live are not prevented by t e equipment panels or by fixed installation detail
(eg ducting), t en guarding to t e appropriate standard must be fitted.
5.2 T e electrical installation of t e equipment must comply wit t e requirements
of t e relevant local electrical safety regulations.
5.3 For EMC all control and sensor cables s ould not be placed wit in 50mm or on
t e same metal cable tray as 230V switc ed live, lig ting or power cables and
any cables not intended for use wit t is product.
6.0 COMMISSIONING REQUIREMENTS
6.1 General pre-commissioning c ecks relevant to safe operation consist of t e
following:
Ensure t at no foreign bodies are present wit in t e fan or casing.
C eck electrical safety. e.g. Insulation and eart ing.
C eck guarding of system.
C eck operation of Isolators/Controls.
C eck fastenings for security.
6.2 Ot er commissioning requirements are given in t e relevant product documentation.
7.0 OPERATIONAL REQUIREMENTS
7.1 Equipment access panels must be in place at all times during operation of t e
unit, and must be secured wit t e original fastenings.
7.2 If failure of t e equipment occurs or is suspected t en it s ould be taken out of
service until a competent person can effect repair or examination. (Note t at
certain ranges of equipment are designed to detect and compensate for fan failure).
8.0 MAINTENANCE REQUIREMENTS
8.1 Specific maintenance requirements are given in t e relevant product documentation.
8.2 It is important t at t e correct tools are used for t e various tasks required.
8.3 If t e access panels are to be removed for any reason t e electrical supply to t e
unit must be isolated.
8.4 A minimum period of two minutes s ould be allowed after electrical disconnection
before access panels are removed. T is will allow t e impeller to come to rest.
NB: Care s ould still be taken owever since airflow generated at some
ot er point in t e system can cause t e impeller to “windmill” even w en
power is not present.
8.5 Care s ould be taken w en removing and storing access panels in windy
conditions.
INFORMATION FOR SAFE INSTALLATION, OPERATION AND MAINTENANCE
OF NUAIRE VENTILATION EQUIPMENT
DECLARATION OF INCORPORATION AND INFORMATION
FOR SAFE INSTALLATION, OPERATION AND MAINTENANCE
DECLARATION OF CONFORMITY
We declare t at t e mac inery named below is intended to be assembled
wit ot er components to constitute a system of mac inery. All parts
except for moving parts requiring t e correct installation of safety guards
comply wit t e essential requirements of t e Mac inery Directive. T e
mac inery s all not be put into service until t e system as been
declared to be in conformity wit t e provisions of t e EC Mac inery
Directive.
Designation of mac inery: MRXBOX95-WALL
Mac inery Types: Mec anical Ventilation wit
Heat Recovery
Relevant EC Council Directives: 2006/42/EC (Mac inery Directive)
Applied Harmonised Standards: BS EN ISO 12100-1, BS EN ISO 12100-2,
EN60204-1, BS EN ISO 9001,
BS EN ISO 13857
Applied National Standards: BS848 Parts 1, 2.2 and 5
Signature of manufacture representatives:
Name: Position: Date:
1) C. Biggs Tec nical Director 29. 12. 09
2) A. Jones Manufacturing Director 29. 12. 09
Note: All standards used were current and valid at t e date of signature.