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
. 0
5.
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
T: 029 2088 5911 F: 029 2088 7033 E: info@nuaire.co.uk W: www.nuaire.co.uk
