Air Change WM-ERV Manual

Air Change Pty Ltd
ACN 003 508 996
New South Wales
12 Parraweena Road, Taren Point, NSW 2229
PO Box 2403 Taren Point NSW 2229
Phone [phone], Fax [phone]
Email [e-mail]
South Australia
239 Magill Road, Maylands, SA 5069
PO Box 171 Stepney SA 5069
Phone [phone], Fax [phone]
Email [e-mail]
Queensland
Unit 2/10 Central Court, Hillcrest, QLD 4118
PO Box 1175 Browns Plains QLD 4118
Phone [phone], Fax [phone]
Email [e-mail]
Victoria
1 Tangara Lane, Harkaway VIC 3806
Phone [phone], Fax [phone]
Email [e-mail]
LEADERS IN HEAT EXCHANGE TECHNOLOGY
www.air-change.com
INSTALLATION AND MAINTENANCE MANUAL
WALL MOUNT
ENERGY RECOVERY VENTILATOR
Model: WM-ERV
VERSION 2005.2

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1 INTRODUCTION ..................................................................................................................3
1.1 Safety Considerations .....................................................................................................3
1.2 Note to Installer...............................................................................................................3
1.3 Inspection and Unpacking...............................................................................................4
1.4 Unit Handling..................................................................................................................4
2 INSTALLATION OF WM-ERV............................................................................................5
2.1 Location ..........................................................................................................................5
2.1.1 General...........................................................................................................................5
2.1.2 Internal Inlet/Outlet Considerations........................................................................5
2.1.3 External Inlet/Outlet Considerations.......................................................................5
2.2 Installation and fitting of Ventilation unit.......................................................................5
2.3 Electrical .........................................................................................................................6
3 SYSTEM COMPONENTS.....................................................................................................7
3.1 General............................................................................................................................7
3.2 System Components........................................................................................................7
3.2.1 Cabinet...........................................................................................................................7
3.2.2 Fans................................................................................................................................7
3.2.3 Heat Exchanger..............................................................................................................7
3.2.4 Filters .............................................................................................................................8
3.2.5 Electrical ........................................................................................................................8
3.3 Schematic Dimensional Data and Wiring Diagram -Following Pages..........................8
4 SERVICE AND MAINTENANCE........................................................................................9
4.1 Ventilation unit General..................................................................................................9
4.2 Heat exchangers -Air Change Enthalpy Heat exchangers ...........................................9
5.1.1 Enthalpy Heat exchanger Maintenance..........................................................................9
4.3 Fans...............................................................................................................................10
4.4 Maintenance Schedule ..................................................................................................10
4.4.1 General.........................................................................................................................10
4.4.2 Monthly Maintenance Schedules..........................................................................10
4.4.3 Three-Monthly Checks .........................................................................................10
4.4.4 Annual Maintenance....................................................................................................10
WARRANTY INFORMATION, TERMS & CONDITIONS......................................................12

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AIR-CHANGE 100% OUTDOOR AIR WALL MOUNTED
ENERGY RECOVERY VENTILATOR (WM-ERV)
1INTRODUCTION
1.1 Safety Considerations
IMPORTANT
DO NOT LEAVE HEAT EXCHANGER EXPOSED TO DIRECT SUNLIGHT. Prolonged
exposure to UV light can cause severe damage to the structure of the heat
exchanger, and will void the warranty.
WARNING
Improper installation, service, maintenance or use can cause fire, electrical shock or
other conditions which may cause personal injury or property damage and will void the
warranty. Check with Air Change or nearest Air Change dealer for any information
required on the ventilation unit equipment.
DANGER
Electrical shock can cause personal injury or death. Before performing any work
on this equipment, the electrical supply must be turned off at the electrical
service box to avoid the possibility of shock, injury or damage to equipment.
Note: There may be more than one power supply circuit.
1.2 Note to Installer
•Only trained and qualified personnel should install,repair or service air
conditioning equipment. Untrained supervised operatives can perform basic
maintenance functions such as cleaning or replacing filters. Service personnel
must perform all other operations.
•Installing and servicing air conditioning equipment can be hazardous due to
electrical and mechanical components.
•When working on electrical equipment, observe precautions in all literature, tags
and labels attached to or shipped with unit. Follow all safety codes and
guidelines. Wear safety goggles, work gloves and any protective clothing.
•All work must comply with relevant SAA wiring rules and local authority codes.
Installers must ensure that all statutory regulations and by laws have been
addressed.

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•Installers must ensure that the structures built to take the units have been
suitably constructed for the purpose, all safety precautions have been applied
prior to installation, and all preparation work has been constructed and suitably
sized for its purpose.
1.3 Inspection and Unpacking
•The unit should be inspected upon delivery for possible external damage
incurred during transport. If damage is evident it should be noted on the freight
docket and the Air-change sales office contacted. A claim should be lodged with
shipping company within three (3) days if shipment is damaged or incomplete.
•If major damage is apparent, do not lift unit on to site without prior approval from
Air-change.The unit was inspected prior to packing and was in perfect condition
at that time.
•Test load to see if the weight is equally distributed. Do this by lifting the unit a few
centimetres off the floor and holding it there before lifting any further or before
transporting the unit.
•Check unit rating plate to ensure the correct unit matches the job specifications.
1.4 Unit Handling
•Protective packaging should not be removed until the unit is at the point of
installation. When removing packaging, be careful not to damage, scratch or dent
the unit. After removal of packaging or crating, all removable access panels
should be opened to inspect for unit internal damage.
•Exercise extreme caution when lifting.

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2INSTALLATION OF WM-ERV
2.1 Location
2.1.1 General
•The ventilation unit is located through an outside wall or suitable window
•The WM-ERV package is marked with stickers “Fresh air” “Supply Air”,
“Return Air” and “Exhaust Air” showing the air path through the unit.
2.1.2 Internal Inlet/Outlet Considerations
•Whenever possible, the unit should be located where the fresh air can be
mixed with the refrigerated air from the air conditioner.
•The prime function of the unit is to deliver pre-conditioned fresh air by
transferring the energy from the cold stale return air. Therefore the unit must
be located away from where the cold return air can be affected by a heat
source i.e. a frequently opening door to exterior, or near any major source of
heat generation.
•The introduced fresh air should also be above head height to avoid blowing directly
on to occupants.
2.1.3 External Inlet/Outlet Considerations
•The exhaust discharge should be directed in a clear path away from any
windows that can be opened.
•Location of the fresh air inlets should adhere to the Australian Standards
1668.2 Code.
•The fresh air intake should be positioned clear of any objects which could
obstruct the airflow and be clear of any polluted air from other units, exhaust
fans, kitchen or toilet exhausts, etc.
•When the unit is fully installed, make sure the outside inlet grille opening and the
return air inside are completely free and not blocked off in any way.
2.2 Installation and fitting of Ventilation unit
NOTE: Any studs that are cut have to be cross noggined for support of the wall.
Steps:
1Remove front panel by lifting up and out;
2Remove fan drawer by drawing forward towards yourself;
3Remove filter by drawing forward towards yourself;

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4Remove heat exchanger by removing security screws, and drawing forward towards
yourself;
5Cut aperture 715mm wide x 760mm high. The depth of the carcass is 595mm with an
additional 145 mm protruding face panel (see drawing);
6The unit must be inserted from inside the room. Push unit through aperture until flange
seals against the wall;
7Fix through bottom and through sides 460mm up from bottom;
8Timber or metal sealing batons for the rear of the unit will need to be supplied by the
installer;
9Replace fan drawer, heat exchanger and security screws, filter and front grille.
2.3 Electrical
•A power supply rated at 240v +/-10% 1 phase, 50Hz is required to operate two
80W fan motors within manufacturer's tolerances. They are controlled by a
variable speed switch
•Mains cables and control circuit wires are to be connected as per wiring diagram
and all wiring must comply with relevant local wiring rules.
•Single phase fan motors are internally protected and there is no need for
external overload switches.

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3SYSTEM COMPONENTS
3.1 General
•The Air Change Wall Mounted Energy Recovery Ventilator (WM-ERV) has been
developed for Classrooms and other applications to supply fresh air to meet
Ventilation codes. The system pre-cools or pre-heats and dehumidifies outdoor
air by transferring the energy from the return air through the heat exchanger
walls to the incoming outdoor air. The Enthalpy Heat Exchanger inbuilt in the
Ventilator has been designed to return around 75% efficiency.
•The WM-ERV is professionally assembled, internally wired through out, with easy
access for filter change. The Front grille is designed to be removed by lifting
upwards and then pulling towards you, allowing access to filters. Remember to
always turn the power off before removing the front grille.
•The WM-ERV provides 300 l/s outdoor air on low speed and 350 l/s outdoor air
on high speed.
3.2System Components
3.2.1 Cabinet
•Prefabricated wall and ceiling panels of are constructed of 1.2mm galvanised
sheet metal, bonded to 10mm aluminium polyethylene insulation.
3.2.2 Fans
•Supply and exhaust fans are 80W centrifugal direct drive and are constructed
using forward curved vanes fabricated from galvanised steel.
•Fans are controlled by an HPM electronic speed control.
3.2.3 Heat Exchanger
•The Energy Reclaim (enthalpy) heat exchanger uses a combination of cross
flow and counter flow, with enthalpy transfer media between moulded plastic
air guiding frames for a very high efficiency and long life. The heat exchanger
has been secured under pressure by galvanised steel end plates and corner
fittings.
•There is no cross contamination between the air paths.
•The counter flow enthalpy heat exchanger incorporated into the unit will
reclaim up to 75% of the energy (under normal operating conditions) from the
return air and transfer it to the incoming outside air, i.e. to pre-treat the
outside air. This results in a saving of up to 75% on the cost of heating or
cooling the outdoor air. (Typical ERV use with normal air conditioning, see
Plan and Side View schematic).

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•Heat exchanger is secured in place by two screws that secure the heat
exchanger to the cabinet. This ensures that the heat exchanger can only be
removed from inside the room.
3.2.4 Filters
•Filters are supplied and fitted in the factory. A single filter is inserted and
removed via the return air inlet grid and provides filtering for both fresh air
inlet and return air inlet of the heat exchanger.
IMPORTANT: Never operate unit without filters fitted to the return
and fresh air intakes.
IMPORTANT: If these units are being used during construction when
adhesive, sealers, ducts, new and used carpets are being installed make
sure all equipment is fitted and adequately protected. We recommend
using disposable or temporary filters during commissioning and during
pre-hand over running.
3.2.5 Electrical
•Internal controls are all 240V supply.Wiring is done in accordance to
Australian Standards and specific state electrical authorities.
•Single phase fan motors are internally protected and there is no need for
external overloads in the ventilation unit.
3.3 Schematic Dimensional Data and Wiring Diagram -Following
Pages.

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4SERVICE AND MAINTENANCE
4.1 Ventilation unit General
•Ventilation units have been designed for easy maintenance with first quality materials
and components used throughout. Preventative maintenance programs will vary
according to actual working conditions and locations and hours of usage by the client.
Air Change will be pleased to provide advice on special service requirements for
particular installations.
4.2 Heat exchangers -Air Change Enthalpy Heat exchangers
IMPORTANT: Return and Fresh air filters must be changed/cleaned
regularly to ensure airflow is unrestricted. Heat exchanger warranty may be
voided if filters are not cleaned according to maintenance schedule and if
proper filtration standards are not adhered to.
NOTE: Air Change can provide a heat exchanger replacement service on
request.
WARNING: Switch off unit before attempting to remove parts for
cleaning.
5.1.1 Enthalpy Heat exchanger Maintenance
IMPORTANT: DO NOT WASH THE ENTHALPY HEAT EXCHANGER
•The Enthalpy Heat exchanger has a brown paper-based enthalpy exchange
media between the plates which can be vacuumed or brushed gently.
IMPORTANT: DO NOT ATTEMPT TO CHANGE THE LENGTH OF THE
HEAT EXCHANGER BY REMOVING END PLATES AND PLASTIC PLATES.
This can mean that the media between the plates is dislodged from its
position and therefore will cause lack of performance through increased
pressure drop through the heat exchanger or damage to the Sensible
media. Any tampering with the heat exchanger may invalidate our warranty
and Air-Change will not be held responsible for lack of performance or
pressure drop.
If the heat exchanger is the incorrect length, please return to Air-change for
a replacement unit.

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4.3 Fans
Fan shaft and motor bearings are of permanently lubricated, sealed type and require no
regular maintenance other than a check on their general condition.
4.4 Maintenance Schedule
4.4.1 General
•Air-change systems are designed for easy maintenance, with highest quality
materials and components used throughout.
•Preventative maintenance programs will vary according to actual working
conditions and location and hours of usage by the client.
•Air-change will be pleased to provide expert advice on special service
requirements for particular installations.
IMPORTANT: Failure to carry out regular maintenance may render
warranty claims invalid if faults have been caused by lack of proper
maintenance. Air-change may request to see the maintenance schedule
carried out.
4.4.2 Monthly Maintenance Schedules.
•Filters should be inspected frequently immediately after installation to confirm
the frequency of cleaning needed for the particular location. Regular
change/clean of filters is necessary to ensure normal operating conditions.
•Vacuum or wash filters, and dry thoroughly before replacing.
The following is a guide until frequency according to usage is established.
4.4.3 Three-Monthly Checks
•Repeat the Monthly Schedule
•Clean Heat Exchanger (see section 4.1)
•Check fan blower wheels for dirt build-up and tightness on shaft
•Check all cabinet panels for correct fitting, alignment and seals, and clean
cabinet as required. Ensure no insulation has been detached from panels.
•All electrical terminals should be checked for tension on each maintenance
visit with main switch off.
4.4.4 Annual Maintenance
•Repeat monthly and three-monthly checks