Vent-Axia Lo-Carbon PureAir Home Positive Input Ventilation Unit Instruction Manual

Vent-Axia Lo-Carbon PureAir Home Positive Input Ventilation Unit

Specifications

• Product Name: Lo-Carbon PureAir Home Positive Input Ventilation Unit
• Power Supply : 220-240V~50Hz
• Speed Settings: Trickle and Energy Recovery
• Adjustable Speed Range : 19L/s to 49L/s
• Features: Sensor for temperature monitoring, data logging function
• Weight: Approximately 4 kg

Installation Instructions

Safety and Guidance Notes
Before commencing the installation, read the safety and guidance notes provided in the manual.

Introductory Notes
The Lo-Carbon PureAir Home is a positive input ventilation unit designed for continuous fresh air supply. It includes a fan unit, a heater unit (for heater models), and a diffuser (for diffuser models) with flexible ducting.

Typical Installation
Prior to installation, ensure proper ventilation in the loft and seal water tanks and pipes. Check exhaust fans, seal holes in ceilings, and inspect flues or chimneys for leaks. The fan unit can be floor mounted or hung from a roof beam.

• Hanging Method
  Hang the unit from a roof beam by fixing a screw eye and using the cord provided. Ensure gentle bends in the ducting route and secure filter fitting for fresh air filtration.

• Floor Mounting
  Attach mounting legs to the unit and find a suitable location near the diffuser. Ensure proper ducting route without crushing and refer to the Diffuser Grille Fitment section for more details.

FAQ

• What is the purpose of the Lo-Carbon PureAir Home ventilation unit?
  The unit is designed to supply filtered fresh air continuously into a building, promoting better indoor air quality.

• How can I adjust the speed settings of the unit?
  The Lo-Carbon PureAir Home has two adjustable speed settings, ‘Trickle’ and ‘Energy Recovery’, which can be set during installation or manually adjusted within a range of 19L/s to 49L/s.

SAFETY AND GUIDANCE NOTES

IMPORTANT:
READ THESE INSTRUCTIONS BEFORE COMMENCING THE INSTALLATION

1. DO NOT install this product in areas where the following may be present oroccur:
2. Excessive oil or a grease laden atmosphere.
3. Corrosive or flammable gases, liquids or vapours.
4. Ambient temperatures higher than 40°C or less than -5°C.
5. Possible obstructions which would hinder access or removal of the Fan.
6. Relative humidity above 90%
7. Sudden ductwork bends or transformations close to the Unit.
8. All wiring to be in accordance with the current I.E.E. Regulations, or theappropriate standards of your country and MUST be installed by a suitablyqualified person.
9. The fan must be provided with an isolator switch capable of disconnecting allpoles, having a contact separation of at least 3mm.
10. Ensure that the mains supply (voltage, frequency, and phase) complies withthe fan’s rating label.
11. The fan should not be used where it is liable to be subjected to direct waterspray.
12. This appliance can be used by children aged from 8 years and above andpersons with reduced physical, sensory or mental capabilities or lack ofexperience and knowledge if they have been given supervision or instructionconcerning use of the appliance in a safe way and understand the hazardsinvolved. Children shall not play with the appliance. Cleaning and usermaintenance shall not be made by children without supervision.
13. Precautions must be taken to avoid the back-flow of gases into the room fromthe open flue of gas or other fuel-burning appliances.
14. Children of less than 3 years should be kept away unless continuouslysupervised.
15. Children aged from 3 to 8 years shall only switch on/off the appliance providedthe unit is installed as intended for normal operation and they have been givensupervision or instruction concerning safe use of the appliance and understandthe hazards involved.
16. Children aged 3 to 8 shall not plug in, regulate and clean the appliance orperform user maintenance
    Caution – some parts of this product can become very hot and cause burns. Particular attention has to be given where children and vulnerable people are present.

INTRODUCTORY NOTES

• The Vent Axia Lo-Carbon PureAir Home is a positive input ventilation unit, designed to be installed in the loft of a dwelling to continually supply filtered fresh air into the building. The system consists of a fan unit, a heater unit (for heater models) and a diffuser (for diffuser models) with a short length of flexible ducting.
• The Lo-Carbon PureAir Home has two fully adjustable speed settings; ‘Trickle’ and Energy recovery’. These speeds are set during installation; there are four pre-set speeds or an option allowing the speeds to be chosen manually from 19L/s to 49L/s. The Lo-Carbon PureAir Home uses a sensor to monitor the temperature in the loft, automatically adjusting the air volume when necessary.
  • The fan will run in ‘Trickle’ speed when the ambient loft temperature is less than 18°C (adjustable via the Trickle Speed Temperature Threshold setting).
  • The fan will run in ‘Energy recovery’ speed when the ambient loft temperature is between the Trickle Speed Temperature setting (default 18°C) and Temperature Limit setting (default 27°C).
  • If the ambient loft temperature exceeds the Temperature Limit setting (default 27°C), the fan will automatically switch to standby (no airflow).
  • If the ambient loft temperature is below -5°C, the fan will automatically switch to standby (no airflow).
  • Remote Purge/Boost is achievable by using the Boost Switch Link Connector (sold separately –411150).
• The heater (if applicable) will activate when the ambient loft temperature is below the Heater Threshold Temperature set point (default is 10°C). The set point can be adjusted between 5°C and 20°C. The heater is designed to try and maintain the heater set point temperature, however, will depend on the chosen flow rates and temperature of the incoming air.
• The unit also incorporates a data logging function. This function will display total runtime of system, time spent in trickle speed, time spent in energy recovery speed, approximate energy consumption of the fan and approximate energy consumption of the heater unit. This data is non-resettable.

INSTALLATION

TYPICAL INSTALLATION

• Lo-Carbon PureAir Home UNIT:

  • Prior to installation ensure that the loft is adequately ventilated.
  • Ensure that all water tanks are covered and sealed.
  • Check that all water pipes are lagged.
  • Ensure that any extract fans are discharging to the outside and not into the loft.
  • Check that the loft hatch is tightly sealed.
  • Ensure that all holes in the ceilings are sealed, i.e. ceiling light fittings etc.
  • A visual inspection of any flues or chimneys for leakage in the loft should be carried out by the installer.
  • Flexible ducting is supplied as standard. Ensure that this is pulled out into a smooth single curve to the grille – with no additional bends or excess ducting. If the application requires a fixed 90 degree bend, straight ducting may be used. See Spares and Accessories section.
  • The fan unit can be floor mounted or hung from a roof beam.

• Hanging method:

  • The Lo-Carbon PureAir Home can be hung from a roof beam (Fig. 2). Fix the screw eye to a convenient roof beam. Use the cord provided to loop through the eye and around the handle on the unit, there are various notches for the cord to run through, tie the two ends together using a suitable knot such as an over hand or fisherman’s knot.
  • Ensure that the route for the flexible ducting has gentle bends and that the duct cannot be crushed. See Diffuser Grille Fitment section below for more information.
  • Fit the filters to the unit. Please make sure that the filters are fitted correctly. This will ensure that all the fresh air entering the dwelling has passed through the filter first.
  • Ensure that the screw eye is attached to the beam strongly enough and that the beam is in sufficient condition to withstand the load. The unit weight is approximately 4 kg.

• Floor mounting:

  • Attach the mounting legs to the unit, two per side.
  • Find a suitable location to fix the unit near to where the diffuser is to be located. Ensure that the route for the flexible ducting has gentle bends and that the duct cannot be crushed Fig.3. See Diffuser Grille Fitment section below for more information.
  • The legs and feet can be adjusted to suit ceiling joists of varying spans. Adjust the legs and feet so that the unit spans over two joists. Secure the feet to the joists with screws, Fig.4. In the unlikely event that the legs cannot span the ceiling joists affix the unit to a wooden board or two lengths of timber which can then be screwed to the joists.
  • Fit the filters to the unit. Please make sure that the filters are fitted correctly. This will ensure that all the fresh air entering the dwelling has passed through the filter first.

• 400-600mm Joist Dimensions with Unit Clearance Heights****

• Diffuser Grille Fitment:

  • The diffuser must be carefully sited to ensure the maximum effectiveness of the system. It should be fitted in the ceiling of a common area, ideally above the landing so that the incoming air can reach all the rooms.
  • Cut the flexible ducting to a suitable length, where possible stretch the ducting to its maximum extent and ensure that there is one continuous smooth bend to the diffuser. The ducting must remain a minimum of 1m in length.
  • Remove the loft insulation from the location of the diffuser and cut a 240-260mm diameter hole in the ceiling.
  • Remove the domed cover panel using a small flat blade screw driver to prise it from the assembly.
  • Ensure the four locking tabs are folded in and then push the spigot in to the hole. Holding the diffuser in place; screw the four screws until the locking tabs are holding the diffuser tight against the ceiling (Fig.5). It is important not to over tighten these screws as this may warp the diffuser. Refit the domed cover panel.
  • Fit the free end of the flexible ducting to the diffuser spigot using the worm drive clip supplied.
    IMPORTANT – SMOKE DETECTORS: The diffuser should not be situated within 1m of a smoke detector, however if this is not possible the Lo-Carbon PureAir Home has provisions to blank off the airflow for up to two quadrants of the diffuser. Two blanking plates are provided; these should be pushed on to the support struts inside the diffuser as required. This should be done before the diffuser is installed in the ceiling as when the screws are tightened down the plates can no longer be removed. See Fig.6, showing blocking off opposing quadrants, note any 1 or pair of quadrants can be blocked off as necessary for the install. These block off plates can also be used to ensure the supply air is spread across a room rather than directed at close by walls.

• Blanking off one side reduces the flow by about 6%, but blanking off two sides reduces the flow by about 20% and so if two sides are blanked off then you should consider increasing the fan speed to maintain the appropriate airflow.

TWIN SPIGOT OPTION

(PIV twin spigot kit Ref:- 449071)
Ensure that the adjustable diffuser supplied with the kit is installed nearer to the PureAir Home unit than the diffuser supplied with the unit (Fig.7). This allows both flows to be balanced. Not to be used with FD models unless the diffuser supplied with the kit is replaced with diffuser part 475664.

• Ducting fitment
  Ensure the ducting is securely fixed to the diffuser and fan (or heater if applicable) via the provided worm drive clips. (Fig 8)

• Heater Unit:
  The fan/heater unit must not be located directly below a socket.

AIR FILTER FOAM SEALS

• Please ensure the filter foam seals (x6) are fitted to the spigot ends before fixing the filters. (Fig.10/11)

• Line up the foam seals with the edge of the spigots, making sure not to cover spigot clips as shown. (Fig.11)

• Then fit filters over foam, on to the spigot ends. (Fig.11)
  

• The Lo-Carbon PureAir Home is provided with G4 filters which are suitable for removing airborne contaminants such as pollen and dust.

• Where higher grade filtration is required, optional F7 filters can be used. These filters are effective at removing finer particles such as particulate emissions from diesel engines. In urban areas close to main roads F7 filters are advisable in order to ensure the supply air is clear of these particles which are potentially harmful to health.

• Where F7 filters are fitted, please ensure the flow rate of the fan is as expected. F7 filters cause extra system resistance so it may be necessary to increase the fan speed to compensate.

WIRING

• A means for disconnection must be incorporated into the fixed wiring in accordance with the wiring regulations.
  WARNING: THE POSITIVE VENTILATION UNIT AND ANCILLARY CONTROL EQUIPMENT MUST BE ISOLATED FROM THE POWER SUPPLY DURING THE INSTALLATION / OR MAINTENANCE.

• The Lo-Carbon PureAir Home is designed for operation from a single-phase alternating current source (220-240V AC).

• A 2m integral mains flying lead is connected to the unit for connection to a spur. It should be capable of disconnecting all poles, having a contact separation of at least 3mm.
  WARNING: If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or a similarly qualified person in order to avoid a hazard.

PureAir Home & PureAir Home with Heater unit:

• Ensure the local AC power supply is isolated.

• The product has a pre-wired flying lead. Connect the brown core to Live and the blue core to Neutral.

• Use cable clamps and clips to secure the cable, as appropriate.
  IMPORTANT:
  PureAir Home Fire Damper (FD) models (e.g. 476312) must be fitted with a smoke alarm with a relay to ensure compliance with building regulations.

• In order to have the product switch off in the event of a fire it must be wired using a smoke alarm with a relay system.

• Use Fig.13 as a reference and refer to the instructions provided by the manufacturer of the smoke alarm and relay in order to wire the unit correctly. Ensure the relay works correctly by testing the fire alarm; the unit should switch off when the alarm is sounding.

Boost Switch Link Connector option (Ref:- 411150)
IMPORTANT:
Do not connect mains or any other device to the remote boost cable. It is only intended to be linked via a remote volt free switch to activate the boost function.

1. Connect the boost cable (supplied with 411150) to the connector under the display (on the fan).
2. Wire the boost switch to the two terminals within the junction box. Ensure the cable is secured properly. The switch links the two wires together to activated boost remotely. Once deactivated the fan overruns for the set timeout period (*see bst timer within the fan menu).
   • Normally open – normal mode/trickle
   • Closed link – boost is activated.
     *Within the fan menu “bst” can be set to have an overrun timer of either 0, 1hr, 2hr, 4hr, 8hr.

SETUP

START UP SEQUENCE
When the unit is switched on it will first run through a period of system checks. During this time the display will show various system parameters before the fan motor starts. After 10 seconds the product will be ready for commissioning.

COMMISSIONING

• Accessing the Commissioning Menu
  If the fan is powered and the display is not lit then press any button to access the menu. After 30 seconds without menu activity the display will switch off, any changes to the settings will then be applied.

• There are three buttons on the front of the unit:
  The + button is used to increase the value of a setting, the – button is used to reduce the value of a setting and the Mode button moves to the next menu item

Menu Structure

Speed Settings
The Lo-Carbon PureAir Home has two speed settings, ‘Trickle’ and ‘Energy Recovery’.

• ‘Trickle’ speed is automatically selected when the ambient loft temperature is below the Trickle Speed Temperature Threshold setting. Default setting is 18°C.
• ‘Energy Recovery’ is automatically selected when the ambient loft temperature is between the Trickle Speed Temperature (default is 18°C) and Temperature Limit setting (default is 27°C).
• If the ambient loft temperature exceeds the Temperature Limit setting, the fan automatically switches to standby (no airflow) – except when Radon Mode is enabled. See Radon Mode below for more details.
• If the input air is below -5°C the fan will switch to standby.
  There are 4 pre-set speeds that can be selected based on number of bedrooms in the property. For example, setting b03 being for a three bedroom dwelling. Please see Fig.14 for the approximate flow rates at each setting. Alternatively, the speed settings are also fully adjustable between 19L/s and 49L/s via the manual speed setting option.
  *The table shows a set up representative of a good low resistance installation using the supplied filters. When F7 filters and/or a long duct run are used it may be necessary to use the manual speed selection to meet the required flow rate.

Heater Threshold Temperature
This is the temperature at which the heater will switch on. Default is 5°C. The higher the temperature setting/threshold, the more energy the heater will use. However the lower the setting, the colder the air will be supplied into the house. The heater modulates (switches on/off) to maintain the set heater threshold temperature.

Lock feature

• The menu lock feature will prevent the unit from being adjusted after commissioning without a pass code. This can be set in the menu to any 3 digit hexadecimal combination.
• If the lock feature is enabled; when a button is pressed the display will show, – – –. At this point enter the three digit code by first pressing + or – until the first digit is correct then press MODE to move to the next digit. Repeat until the code is entered and press MODE to enter the commissioning menu. If the code is entered incorrectly, wait until the screen switches off then press any button to begin again.

Radon Mode
Radon mode keeps the fan running even at high temperatures to prevent the build-up of dangerous radon gas in the property. If this is not required, it is recommended not to use this setting.

Trickle Speed Temperature Threshold
The temperature the fan will switch from Energy Recovery Mode to Trickle mode. Usually this would be set to around 18-20°C to be slightly cooler than the normal heating thermostat temperature. Default is 18°C.

Temperature Limit
This is the maximum temperature the fan will run until going into standby. The higher the temperature the more heat will be extracted from the loft. Default is 27°C. Note that this limit is ignored in radon mode.

Accessing Data Logger Menu
To access the menu of data that the unit stores press and hold the mode button for 5 seconds. The menu structure is shown below, press mode to move to the next item:

To exit the menu press MODE for 5 seconds or wait for the screen to switch off.

SERVICING AND MAINTENANCE.

WARNING: THE POSITIVE VENTILATIION UNIT AND ANCILLARY CONTROL EQUIPMENT MUST BE ISOLATED FROM THE POWER SUPPLY DURING THE INSTALLATION / OR MAINTENANCE.

• The fan motor uses sealed ball bearings, and does not require further lubrication.
• Apart from filter change the Lo-Carbon PureAir Home contains no user serviceable parts.
• Filter: Under normal conditions; i.e. away from main roads and industrial areas, it is recommended that the filter is checked annually and cleaned or replaced as necessary. Otherwise change as required. (See Spares part list below)
• The filter may be gently cleaned with a vacuum cleaner or washed in a soapy water solution and allowed to air dry before re-fitting. Do not dry the filter in a tumble dryer.
• When re-fitting make sure that the filter is fitted correctly. This will ensure that all the fresh air entering the dwelling has passed through the filter first.

Below is a list of spares and accessories available for the PureAir Home:

PRODUCT FICHE

For Residential Ventilation Units (Complying Commission Delegated Regulation (EU) No 1254/2014)

Disposal
This product should not be disposed of with household waste. Please recycle where facilities exist. Check with your local authority for recycling advice.

Guarantee

• Applicable only to products installed and used in the United Kingdom. For details of guarantee outside the United Kingdom contact your local supplier.
• Vent-Axia Guarantees this product for 5 years from date of purchase against faulty material or workmanship. In the event of any part being found to be defective, the product will be repaired, or at the Company’s option replaced, without charge, provided that the product:-
  • Has been installed and used in accordance with the instructions given with each unit.
  • Has not been connected to an unsuitable electricity supply. (The correct electricity supply voltage is shown on the product rating label attached to the unit).
  • Has not been subjected to misuse, neglect or damage.
  • Has not been modified or repaired by any person not authorised by the company.
• IF CLAIMING UNDER TERMS OF GUARANTEE
• Please return the complete product, carriage paid to your original supplier or nearest Vent-Axia Centre, by post or personal visit. Please ensure that it is adequately packed and accompanied by a letter clearly marked “Guarantee Claim” stating the nature of the fault and providing evidence of date and source of purchase.
• The guarantee is offered to you as an extra benefit, and does not affect your legal rights

ABOUT COMPANY

• Head Office: Fleming Way, Crawley, West Sussex, RH10 9YX.
• EU Authorised Representative: Vent-Axia Sigarenmaker 5 – 5521DJ Eersel Nederland. authorisedrep@vent-axia.nl
• UK NATIONAL CALL CENTRE, Newton Road, Crawley, West Sussex, RH10 9JA
• SALES ENQUIRIES: Tel: 0344 8560590
• TECHNICAL SUPPORT: Tel: 0344 8560594
• For details of the warranty and returns procedure please refer to www.vent-axia.com or write to Vent-Axia Fleming Way, Crawley, RH10 9YX

References

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