NuAire Ecosmart NRG Instruction Manual
Constant Pressure
Motorised Grille Damper
Type NRG
Installation and Maintenance
Introduction
The motorised damper is manufactured from ABS plastic
and designed for installation with NUAIRE’s range of
Ecosmart Constant Pressure Variable Volume extract fans.
The NRG incorporates a damper that is motorised upon
activation/deactivation of the integral PIR.
Principle features are:
■Integrated PIR with pre set nominal fifteen minute
overrun timer
■12V operating via a 12/230V transformer supplied
as standard.
■The damper is ‘pegged’ so as to prevent full closure,
thereby ensuring continuous trickle ventilation when
the constant pressure fan is operating
■There are four fully open positions to be manually
set at the required boost ventilation rate at
commissioning stage.
Handling
Handle the unit with care to avoid damage and distortion to
moving parts.
Installation
The installation must be carried out by suitably qualified
and competent personnel in accordance with appropriate
authority and in conformance with all statutory and
governing regulations i.e. IEE CIBSE COHSE HVCA etc.
Figure 1. Dimensional Detail
Mechanical Installation
The grille is suitable for internal installation only, mounting
in any attitude and can be installed within the splash zone.
The grille has a 125mm diameter discharge spigot and is a
‘push fit’ to corresponding ductwork, its held in position
by the compression seal attached to the spigot.
Before offering to the ductwork complete the electrical
connection.
Electrical Installation
Position the transformer in the ceiling or service void
allowing for future access, connect to a 230V supply via a
spur fused at 1A. Connect the 12V transformer output to the
connection leads of the grille.
Figure 3. Wiring detail
1
15. 05. 17. Leaflet Number 671279
Figure 2. Performance Detail
Lw Position 1 Position 2 Position 3 Position 4
70Pa 25.1 21.6 - 23
100Pa 30 30.3 32.2 33.3
130Pa 33.5 32.8 36 37.1
150Pa 37.1 37.3 - 38.6
Acoustic Information
Connector Block (by others)
Figure 4. Transformer dimensions
The EMC Directive
2014/30/EU
The Low Voltage
directive
2014/35/EU
Nuaire: A Trading Division of Polypipe Limited Western Industrial Estate Caerphilly United Kingdom CF83 1NA
2
Installation and Maintenance ECOSMART Constant Pressure Motorised Grille Damper
Setting To Work
The trickle ventilation rate is pre set and not
adjustable, take care not to disturb the setting peg.
Boost ventilation rate is set by adjusting the face
mounted slide switch to one of the four positions
as signified by the dots below the slider i.e. one
dot minimum, four dots maximum etc.
(See figure 5). The damper is activated by the
integral PIR and when activated the face mounted
LED will show green.
For system commissioning advice refer to leaflet
number 671238.
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.
15. 05. 17. Leaflet Number 671279
Figure 5. Face mounted slide switch
Maintenance
Maintenance intervals will vary according to the level of
airborne contaminant to which the grille is exposed; check
three months after commissioning and twelve monthly
thereafter.
There are no parts requiring lubrication.
Remove the inlet grille simply by pulling it outwards, remove
all loose dust and dirt with a fine brush taking care not to
disturb the trickle vent peg. Use only a mild detergent on a
damp cloth to remove stubborn dirt.
Spares
There are no recommended spares, should the product
malfunction then it will require total replacement.
Warranty
The product carries a 5 year warranty, the first year parts
and labour and the remaining period parts only,
commensurate from the date of delivery.
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.
After Sales Enquiries
For technical assistance or further product information,
please contact the After Sales Department.
Telephone 02920 858 400
PIR Field of Detection
Figure 6. Ceiling Mounted
Figure 7. Wall Mounted
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