Categories: Nuaire

nuaire DRI-ECO-NOX-HC Whole House Ventilation Unit with Hall Control and Heating Instruction Manual

nuaire DRI-ECO-NOX-HC Whole House Ventilation Unit with Hall Control and Heating

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SAFETY INFORMATION

  • The provision of the electrical supply and the connection of the unit to the mains must be carried out by a qualified electrician.
  • Isolate from power supply before removing any covers. During installation / maintenance ensure all covers are fitted before switching on the mains supply.
  • All-pole disconnection from the mains as shown in the wiring diagram must be incorporated within the fixed wiring and shall have a minimum contact separation of 3mm in accordance with latest edition of the wiring regulations.
  • Ensure the flexible duct (maximum length 2m) is connected to the base unit by inserting the duct over the outlet duct and fix in place using the supplied cable tie.
  • If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.
  • Precautions must be taken to avoid the back-flow of gases into the room from the open flue of gas or other fuel-burning appliances.
  • This appliance should not be used by children or persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge, unless they have been given supervision or instruction concerning the safe use of the appliance by a person responsible for their safety. Children shall not play with the appliance. Cleaning and user maintenance shall not be carried out by children.
  • The fan unit is supplied with a fused spur. The two core mains cable from the fan unit should
    be connected to a fixed wiring installation, via the spur, in accordance with current IEE wiring regulations.
  • The CO2 sensor requires a 230V power supply. Remove the front panel as per the humidity sensor and release the terminal cover via a fixing lug on the rear of the sensor. Refer to the wiring diagram provided and connect the supply to the terminal box. Finally the sensor may be mounted to the wall (screws are not provided).
  • It is important to ensure that the diffuser is NOT placed within 1 metre of a smoke alarm. if the diffuser cannot be repositioned, two sides of the diffuser must be closed off using the air dams supplied to encourage the air through the remaining open sides that faces at least 1.5 metres of unobstructed area away from the smoke alarm sensor.
  • If the unit is required to switch off in the event of smoke/CO detection, alarms are available with separate relay bases from 3rd party companies. This is a mandatory requirement for all units installed in a 3 Storey property.
  • Carbon filters/pellets are not to be ingested, ensure hands are thoroughly washed after handling.
  • To ensure efficient filtration of particulate matter the air filters should be replaced every 5 years as per our recommended maintenance.
  • To ensure levels of NO2 are being reduced, the carbon filters should be replaced every 2 years as per our recommended maintenance.

Important Information
This manual contains important information on the safe and appropriate assembly, transport, commissioning, operation, maintenance, disassembly and simple troubleshooting of the product. While the product has been manufactured according to the accepted rules of current technology, there is still a danger of personal injury or damage to equipment if the following general safety instructions and the warnings contained in these instructions are not complied with.

  • Read these instructions completely and thoroughly before working with the product.
  • Keep these instructions in a location where they are accessible to all users at all times.
  • Always include the operating instructions when you pass the product on to third parties.

Personal Protective Equipment
The following minimum Personal Protective Equipment (PPE) is recommended when interacting with Nuaire product:

  • Full Finger Gloves (Marigold PU800 or equivalent) – when handling sheet metal components or knives. When using silicone, Butyl rubber gloves (0.4mm) are recommended.
  • Safety Glasses – when conducting any cleaning/cutting operation or exchanging filters.
  • Reusable Half Mask Respirators – when replacing filters which have been in contact with normal room or environmental air.

Nuaire would always recommend a site specific risk assessment by a competent person to determine if any additional PPE is required.

IMPORTANT
Isolate from power supply before removing any covers. During installation/maintenance ensure all covers are fitted before switching on the mains supply.

INTRODUCTION

The DRI-ECO-NOX-HC provides whole home ventilation using the Positive Input Ventilation principle. The concept is to introduce fresh, filtered air into the dwelling at a continuous rate, encouraging movement of air from inside to outside. To achieve this the unit is mounted in the loft space, drawing air through the filters and inputting it, at ceiling level, into the property. These units include an internal sensor to regulate the fan speed according to the temperature of the loft. The internal sensor is to increase airflow to the dwelling when the loft is warmer than the house. The units ‘Fixed Temperature Heat Recovery’ strategy shall be achieved via a sensor located in the unit and shall improve energy performance accordingly. This unit has all of the controls for the fan in the ceiling vent allowing the user to control, programme and monitor the unit from inside the property. Once installed, the airflow can be set to suit the house size and, if required, the way it responds to the temperature changes within. This unit includes two Carbon valves which can be installed in each inlet alongside the improved ePM10 filter. Nuaire’s Carbon Filter has been specifically designed to reduce the level of airborne contaminants entering the property, in particular, nitrogen dioxide (NO2), therefore significantly improving indoor air quality (IAQ).

MECHANICAL INSTALLATION

Successful operation of the fan depends entirely upon the unit being installed strictly in accordance with these instructions. Please read through this guide in its entirety before commencing installation and follow step by step to ensure a satisfactory completion. Whilst the installation of this unit may be achieved by suitable persons, the provision of the electrical supply and the connection of the unit to the mains must be carried out by a qualified electrician. This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision. Precautions must be taken to avoid the back-flow of gases into the room from the open flue of gas or other fuel-burning appliances. Means for disconnection must be incorporated in the fixed wiring as shown in the wiring diagram in accordance with IEE wiring or national wiring rules.

Loft Inspection
Check to ensure that the loft has adequate ventilation. There may be occasions where a loft is so well sealed that additional ventilation may have to be provided by the owner/occupier.\ Ensure that all water tanks are covered and sealed. Check that all water pipes are lagged. Ensure that any extract fans are discharging to 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. If any leakage points are found, or if there is any doubt at all, then the installer should advise the house owner/provider as soon as possible and seek instruction from them before proceeding with the installation.
Diffuser Installation
Positioning the Diffuser
The diffuser has a unique air throw pattern and it is essential that it is located correctly in the central hallway in single storey properties or in the ceiling of the top floor landing on 2 or more storey dwellings.
The diffuser discharges air evenly in all directions along the underside of the ceiling.

Speed Setting Minimum Distance From Diffuser To Wall
1 100 mm
2 155 mm
3 400 mm
4 625 mm
5 850 mm
6 1000 mm

Note: SMOKE ALARMS -It is also important to ensure that the diffuser is NOT placed within 1 metre of a smoke alarm.
If the diffuser cannot be repositioned, two sides of the diffuser must be closed off using the air dams supplied to encourage the air through the remaining open sides that faces at least 1.5 metres of unobstructed area away from the smoke alarm sensor.
Fitting Air Dams (if Required)
Air dams should be fitted where needed in order to alter the direction of airflow. 2 air dams are supplied and will fit on any of the diffuser sides to guide airflow away from a smoke detector and/or obstructions.

Fitting Ceiling Diffuser
To install the diffuser, use the tear-out template from the lid of the unit packaging and trace the shape onto the ceiling between two convenient joists. The shape is elliptical to allow space for the PCB of the controls and this should be positioned for ease of access (i.e. NOT facing over a stairwell). Once the shape has been cut out, position the ceiling vent and secure it in place using the 4 screws and plugs provided. After fitting, the fan unit must be connected to the diffuser using the loom provided. The connectors are located on the rear of the ceiling vent and the rear recess of the fan unit. Finally attach the diffuser cap to the frame using the four built-in press on clips provided.

Filter Installation
Place the carbon filter over the central hole as seen in Figure 2 and clamp in place using the filter retaining plate. Secure the retaining plate using the four domed screws provided.

  • Fit the particulate filters by clipping the metal hoop of the particulate filter into the moulded clips.
  • Repeat process for the remaining air inlet of the unit.

The unit can then be attached to the roof via the cord provided (or fixed to the floor joists using the optional anti vibration mounting kit).

DRI-ECO-NOX-HC Installation Joist Hung (Standard Mounting)

The standard method of installation is to suspend from a convenient roof beam via the cord supplied (Note: unit weight = 3.5 kg). The method of locating the cord to the roof timber is the responsibility of the installer. The flexible duct (maximum length 2m) is connected to the fan unit by inserting the duct over the fan outlet and held in place using the supplied cable tie. This method is repeated when connecting the duct to the ceiling vent. Note: Ensure all duct joints are airtight. Please note: The flexible ducting should NOT be installed in a compressive state, as this will negatively impact on the performance of the unit.

Anti-Vibration Mounting (Optional Mounting)
The AV kit contains all the parts necessary to complete a joist mounted installation. If AV mounting is required, the kit can be purchased direct from Nuaire using the following code number: 771393. Lower the unit with battens (not supplied) attached onto the joists. Mark and drill the 12mm diameter clearance holes required in the ends of the battens. Place anti-vibration mounts above and below each batten fixing point and, using the 4 large screws and special washers, fix the unit to the joists. Do not overtighten the fixings. The distance from the top washer to the joist when installed must not be less than 50mm.

ELECTRICAL INSTALLATION

Please note: the electrical connection of the unit must be carried out by a qualified electrician.

  • Electrical details
  • Voltage
  • Consumption
  • Fuse size

The fan unit is also supplied with a fused spur. The three core mains cable from the unit should be connected to a fixed wiring installation, via the spur, in accordance with current IEE wiring regulations. Disconnection from mains must be incorporated within the fixed wiring and shall have a maximum contact separation of 3mm in accordance with latest edition of the wiring regulations.

IMPORTANT
For good EMC engineering practice, the power supply output cable and any sensor cables should not be placed within 50mm of other cables or each other.

SMOKE / CARBON MONOXIDE ALARM AUTOMATIC SHUT DOWN

the unit is required to switch off in the event of smoke/CO detection, alarms are available with separate relay bases from companies such as:
Kidde – www.kiddesafetyeurope.co.uk
Aico Ltd – www.aico.co.uk
Note: This is a mandatory requirement for all units installed in a 3 Storey property.

CONTROLS

Speed Setting
Due to the increased resistance of the carbon and ePM10 filters, only speeds 3-6 should be used. If the unit is currently set to speed 1 or 2 increase to the minimum required speed of 3.

DRI-ECO with Carbon and ePM10 Air Filters
Speed Air Flow Rate (l/s)
1 5
2 11
3 18
4 25
5 33
6 41

Selecting a Speed
When power to the unit is switched on the display will show the temperature control option for 2 minutes. Once the start-up pattern has completed you may now press the “up” or “down” switch to choose the flow rate appropriate to the property you are installing the unit in.
Setting the Temperature Operating Mode
When delivered, the unit is set to temperature operating mode setting of 3 as a default. To change this setting, switch the power to the unit on (via the supplied isolator). The display in the ceiling vent will show the start-up pattern for two minutes and the unit will begin running at speed 6. In this time you can change the temperature setting by pressing and holding the “up” switch. The display will show a flashing value of 3 and will increase every 4 seconds. Once you have reached the temperature setting you require press and release the “down” button to store the setting. The fan will now enter into its normal speed setting mode and a speed can be selected at this point.

Option Temperature Operating Mode Description
1 At loft temperatures below 19°C the unit will operate on “Normal Operation Mode”. At loft temperatures above 18°C but less than 24°C, the unit will switch automatically to “Intelligent Heat Recovery Mode”. At loft temperatures above 23°C the unit will switch itself automatically to “Standby Mode”.
2 At loft temperatures below 19°C the unit will operate on “Normal Operation Mode”. At loft temperatures above 18°C but less than 31°C, the unit will switch automatically to “Intelligent Heat Recovery Mode”. At loft temperatures above 30°C the unit will switch itself automatically to “Standby Mode”.
3

(Default & recommended)

This option removes the temperature sensing function out of the unit. The unit will operate continuously in “Normal Operation Mode” depending on the volume control setting selected.
4 At loft temperatures below 16°C the unit will operate on “Normal Operation Mode”. At loft temperatures above 15°C but less than 28°C, the unit will switch automatically to “Heat Recovery Mode”. At loft temperatures above 27°C the unit will switch itself automatically to “Standby Mode”.
5 At loft temperatures below 19°C the unit will operate on “Normal Operation Mode”. At loft temperatures above 27°C or below 5°C the unit will switch itself automatically to “Standby Mode”. Notes: Speed Setting 1 is not available for Temperature Control Option 5. On selecting Temperature Control Option 5, Speed Setting 1, the unit will operate as Speed Setting 2.

MAINTENANCE

It is important that maintenance checks are recorded and that the schedule is always adhered to, in all cases, the previous report should be referred to.
Filter Maintenance
Change carbon filters every 2 years, failure to do so may impair the performance and efficiency of this unit. As standard, each DRI-ECO-NOX unit is supplied with ePM10 particulate filters, which should be visually checked every 2 years and changed every 5 years at minimum. The unit display will show the letter ‘C’ once this time has elapsed. New particulate filters can be purchased direct from Nuaire using the following part number: DRI-PM10-FILTERS (five year filters). To reset the change filter message, press and hold BOTH “up and “down” button until the letter ‘C’ starts to flash then release and press the “down” button. If the units’ performance has been reduced dramatically or black dust becomes visible around the outlet diffuser, check that the filter has not become dislodged in any way.

WARRANTY

The 7 year warranty starts from the day of delivery and includes parts and labour for the first year. The remaining period covers replacement parts only. This warranty is void if the equipment is modified without authorisation, is incorrectly applied, misused, disassembled, or not installed, commissioned and maintained in accordance with the details contained in this manual and general good practice. Filter replacement is not covered by the unit warranty.
The product warranty applies to the UK mainland and in accordance with Clause 14 of our Conditions of Sale. Customers purchasing from outside of the UK should contact Nuaire International Sales office for further details.
Failure to maintain the unit as recommended will invalidate the warranty. Where a floor/room is more than 4.5m tall, the fan unit must be fitted with a 3 storey aluminium diffuser and requirements in section 5.0 followed.

END-OF-LIFE AND RECYCLING

Where possible Nuaire use components which can be largely recycled when the product reaches its end-of-life:

  • Fans, motors, controls, actuators, cabling and other electrical components can be segregated into WEEE recycling streams.
  • Sheet metal parts, aluminium extrusion, heating/cooling coils and other metallic items can be segregated and fully recycled.
  • EPP, plastic ducting, nylon corner pieces, plastic heat exchangers, packaging material and other plastic components can be segregated into mixed plastic and widely recycled.
  • Cardboard packaging, wood, used filters and other paper components can be largely recycled or fully processed in energy from waste centres.
  • Remaining Items can be further segregated and processed in accordance with the zero waste hierarchy. Please call After Sales Support for further information on items not listed above.

FREQUENTLY ASKED QUESTIONS

While very rare, issues with newly installed units can occur. Typically these issues can be easily solved by referring to the below table.

Symptom Cause Solution

 

 

 

 

 

Fan not running.

NO power to the unit (Display is NOT lit). Ensure unit has not been switched off or that the local fuse has not blown.

Software error – Power to the unit (Display is lit).

If electricity present, power off, wait and power on again – this may restart

the unit.

Fan failure – Power to the unit (‘F’ is flashing on display). Fan has failed and a replacement unit is required.

High loft temperature.

This is normal, see temperature control options.

AFTER SALES AND REPLACEMENT PARTS

For technical assistance or further product information, including spare parts and replacement components, please contact the After Sales Department. If ordering spares please quote the serial number of the unit together with the part number, if the part number is not known please give a full description of the part required. The serial number will be found on the identification plate attached to the unit casing.

Documents / Resources

nuaire DRI-ECO-NOX-HC Whole House Ventilation Unit with Hall Control and Heating [pdf] Instruction Manual
DRI-ECO-NOX-HC, Whole House Ventilation Unit with Hall Control and Heating, DRI-ECO-NOX-HC Whole House Ventilation Unit with Hall Control and Heating

References

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