NuAire DRI-ECO-HEAT-HCS User manual

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15. 03. 21. Document Number 671846Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
DRI-ECO-HEAT-HCS
Whole House Ventilation Unit With Hall Control
Installation Manual
1.0 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.
• This unit must be earthed.
• Ducting must be securely fixed with screws to the spigot(s) to prevent access to live parts. Duct
runs terminating close to the fan must be adequately protected by suitable guards.
• 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.
• In order to avoid a hazard due to inadvertent resetting of the thermal cut-out, this appliance
must not be supplied through an external switching device, such as a timer, or connected to a
circuit that is regularly switched on and off by the utility.
• The fan unit is supplied with a fused spur. The three 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 heater unit must be connected to the ceiling vent and fan unit using the 3 looms that
protrude from the heater module.
• 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.

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15. 03. 21. Document Number 671846Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
DRI-ECO-HEAT-HCSInstallation Manual
• 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.
• To ensure efficient filtration of particulate matter the air filters should be replaced every 5 years
as per our recommended maintenance.
1.1 Hazard Symbols
GENERAL WARNING
Signifies a general warning regarding hazard specified by supplementary information.
ELECTRIC SHOCK
This unit must be completely electrically isolated before any panels are removed. Check
mains supply and control connections.
ROTATING PARTS
This unit contains fast moving rotational parts which may start automatically. It is the
sole responsibility of the installer to adequately guard these components.
REFER TO INSTRUCTION MANUAL
Read and understand the installation and maintenance manual before installing,
operating or maintaining this product.
1.2 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.
1.3 Personal Protective Equipment
The following minimum Personal Protective Equipment (PPE) is
recommended when interacting with Nuaire product:
•Protective Steel Toed Shoes - when handling heavy objects.
•Full Finger Gloves (Marigold PU800 or equivalent) - when
handling sheet metal components.
•Semi Fingerless Gloves (Marigold PU3000 3DO or equivalent)
- when conducting light work on the unit requiring tactile
dexterity.
•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.
2.0 INTRODUCTION
The DRI-ECO-HEAT-HCS 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.
The DRI-ECO-HEAT-HCS fan unit includes 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 the controls
for the fan in the ceiling vent allowing the user to control, programme
and monitor the unit from inside the property. A heater section
incorporating a 400W heating element shall be fitted to the fan unit.
It shall be electronically controlled so as to minimise energy use. A
temperature sensor shall be fitted to the outlet of the heater and will
control the output of the heater in an attempt to maintain the set
point. The set point will be adjustable between 5˚C and 15˚C.
Once installed, the airflow can be set to suit the house size and, if
required, the way it responds to the temperature changes within.
3.0 GENERAL 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 the 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.
Warning: Isolate from power supply before removing any covers.
During installation/maintenance ensure all covers are fitted before
switching on the mains supply.

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15. 03. 21. Document Number 671846Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
DRI-ECO-HEAT-HCSInstallation Manual
4.2 Fitting The Air Dams (If Required)
Air dams are provided to alter the direction of airflow and should be
fitted as needed. 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.
Ceiling Vent
Two Air Dams (supplied) can t on any of the diuser sides to guide
airow away from a smoke detector and/or obstructions as required.
Diuser Cap
Airow
Airow
1 Diffuser Overview
4.3 Fitting The 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 and
secure it in place using the 4 screws and plugs provided. After fitting
attach the diffuser cap to the frame using the four built-in press on clips
provided.
5.0 HEATER INSTALLATION
The heater unit must be electrically connected to the ceiling vent and
fan unit using the 3 looms that protrude from the heater module.
Connect the ceiling vent control loom to the circuit board on the ceiling
vent and insert the heater module into the ceiling vent. Connect the
interconnect loom into the rear of the fan unit. Connect the mains
power loom into the power outlet on the underside of the fan unit.
The flexible duct (maximum length 2m) is connected to the base unit
by inserting the duct over the outlet duct and held in place using the
supplied cable tie.
Push heater enclosure onto the back of the ceiling diffuser ensuring all
four clips engage.
Finally when installing the duct to the heater unit insert the duct over
the back of the heater, over the four protruding lugs and fasten the
cable tie below. This ensures that the duct will be held on securely,
check all duct joints are air tight.
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.
CAUTION: In order to avoid a hazard due to inadvertent resetting
of the thermal cut-out, this appliance must not be supplied
through an external switching device, such as a timer, or connected
to a circuit that is regularly switched on and off by the utility.
3.1 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.
•Check any flues or chimneys for leakage in the loft via a visual
inspection, 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.
4.0 DIFFUSER INSTALLATION
4.1 Siting 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 Of Diffuser From Wall
1 100mm
2 155mm
3 400mm
4 625mm
5 850mm
6 1000mm
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, the diffuser must be positioned
so as to encourage the air through the 2 open sides that face at least 1.5
metres of unobstructed area away from the smoke alarm sensor.

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15. 03. 21. Document Number 671846Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
DRI-ECO-HEAT-HCSInstallation Manual
Interconnecting
Loom
230V
Supply
Cord
Ceiling
Diuser
Loom
2 Aluminium Diffuser Overview
6.0 FILTER INSTALLATION
The filter has a push fit rim to attach itself to the main body of the unit.
Offer the filters up to the unit and apply a small amount of pressure to
the filters rim (by hand). The filter will clip into place.
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).
3 Filter Installation
7.0 DRI-ECO-HEAT-HCS INSTALLATION
7.1 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.
The flexible ducting should NOT be installed in a compressive
state, as this will negatively impact on the performance of the unit.
4 Joist Hung Unit
7.2 Anti-Vibration Mounts (Optional)
The AV kit contains all the parts necessary to complete a joist mounted
installation. If AV mounts are required, the kit can be purchased direct
from Nuaire using the following part number: 771393.
Lower the unit with battens (not supplied) attached to 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.
5 Anti-Vibration Mounted Unit
6 Anti-Vibration Mount Detail

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15. 03. 21. Document Number 671846Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
DRI-ECO-HEAT-HCSInstallation Manual
8.0 ELECTRICAL INSTALLATION
8.1 Electrical Information
The electrical connection of the unit must be carried out by a qualified
electrician.
Voltage: 230V 1ph 50Hz
Consumption: 1.6W(min) 15.3W(max) Up to 422W with
heater at full load.
Fuse size: 3 Amp
The unit is supplied with a pre-wired power supply. This power supply
unit has a metal bracket incorporating fixing holes, which should be
used to fit the power supply to a suitable surface e.g. a wooden joist.
The fan unit is also supplied with a fused spur. The two core mains
cable from the power supply 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.
For good EMC engineering practice, the DRI-ECO-HEAT-HCS power
supply output cable and any sensor cables should not be placed
within 50mm of other cables or each other.
8.2 Wiring Diagram
7 Unit Wiring
Fused Spur
(Supplied)
3 amp
Drimaster
Fan Unit
Interconnecting
Loom
Diffuser
Loom
230V
Supply Cord Heater
Ceiling
Diffuser
230V
AC
2 Pole
Isolator
(By Others)
Mains
230V
50Hz
L
N
8.3 Replacing a Supply Cord
If the mains supply cord to the PSU is damaged, it must be replaced
by the manufacturer, its service agent or similarly qualified persons in
order to avoid a hazard.
9.0 SMOKE / CARBON MONOXIDE ALARM
AUTOMATIC SHUT DOWN
If 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
This is a mandatory requirement for all units installed in a 3 Storey
property.
POWER
SUPPLY
FAN
UNIT
Mains power Smoke/CO detector
with NO/NC contacts
NC NO
N
L
N
L
C
230V
Supply
230V 24V
For information only,
refer to manufacturer’s
specific instructions.
8 Alarm Wiring
10.0 CONTROLS
In the event of conducted RF interference between 80 to 127 MHz
or transient radiated interference between 80 to 87 MHz, the unit
may go into standby mode or the LED display may go blank and fan
stop temporarily, then go into reset mode (LED flashing with the
number of the speed setting) and run at high speed.
The unit will return to normal after 2 minutes after the RF
interference has stopped.
10.1 Speed Settings
The unit has 5 air flow rate (speed) settings, 2-6. Switches to control
the speed settings and the display are located on the underside
of the diffuser. The following table shows the flow rates and their
corresponding speed settings.
As an example a one bedroom bungalow should be set to speed 2, and
a large 5 bedroom detached property would require speed 6.
Speed Setting Airflow Rate (litres / Second)
0 Standby (0)
1 10*
2 20
3 30
4 40
5 50
6 60
*At speed 1 the heater will not be enabled.
10.2 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.
UP DOWN
DriMaster-Eco
MIN MAX
UP DOWN
DriMaster-Eco
MIN MAX
Auto Heat Enable LED
9 Selecting a Speed
10.3 Setting the Temperature Set Point
A temperature sensor is fitted to the outlet of the heater and will
control the heater output to maintain the set point. The set point
ranges between 5˚C (fully anti-clockwise) and 15˚C (fully clockwise)
and can be adjusted via the min/max commissioning pot located on the
ceiling vent diffuser.

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DRI-ECO-HEAT-HCSInstallation Manual
10.4 Setting the Temperature Control Option
When delivered, the unit is set to temperature setting 1 as a default.
To change this setting, switch the power to the unit on via the isolator
(supplied by others). The display in the ceiling vent will show the start-
up pattern for two minutes and the unit will being 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 1 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 Control Description
1
(Default)
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”.
2At 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”.
3This option removes the temperature sensing function
out of the unit.
The unit will operate continuously in “Normal Oper-
ation Mode” depending on the volume control setting
selected.
4At 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 Not applicable for the HEAT model.
10.5 Heater On (Auto Heat) / Off Control
When the orange LED on the diffuser control panel is illuminated, the
heater is active in autoheat mode and is controlled by the temperature
setpoint. When the orange LED is not lit, the heater is off.
In order to enable the heater, press the DOWN button for five seconds
and release. The orange LED will illuminate indicating that the heater is
active and in auto heat mode.
To turn the heater off, press the DOWN button for five seconds and
release. The Orange LED will no longer be illuminated, indicating that
the heater is off. Heater is enabled only when the orange LED is
illuminated.
11.0 MAINTENANCE
Isolate before commencing work, make sure that the unit, switched
live and Nuaire control are electrically isolated from the mains
supply and switched live supply.
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.
11.1 Filter Maintenance
The filters are required to be changed every five years, failure to do so
may impair the performance and energy efficiency of this unit. The unit
display will show the letter ‘C’ once 5 years of use has elapsed.
New filters can be purchased direct from Nuaire using the following
part number: DRIPOS2001-FILTERKIT (five year filter). 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.
12.0 WARRANTY
The 5 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.
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 8.0 followed.
13.0 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.
Ensure that Nuaire product is made safe from any electrical / water
/ refrigerant supplies before dismantling commences. This work
should only be undertaken by a qualified person in accordance with
local authority regulations and guidelines, taking into account all
site based risks.

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15. 03. 21. Document Number 671846Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
DRI-ECO-HEAT-HCSInstallation Manual
14.0 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.
15.0 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.
A QR code linking directly to the Nuaire website is located behind the
diffuser plate and can be used to order spare parts and replacement
components.
Telephone [phone]
[e-mail]
Technical or commercial considerations may, from time to time,
make it necessary to alter the design, performance and dimensions
of equipment and the right is reserved to make such changes without
prior notice.

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15. 03. 21. Document Number 671846Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
DRI-ECO-HEAT-HCSInstallation Manual
NOTES