2.0 GENERAL DESCRIPTION
The
CMX-S
appliance is a key part of a whole house ventilation system
specifically designed to improve indoor air quality in dwellings. The
system is designed to remove polluted, stale air from all bathing,
cooking and washing areas at a constant gentle rate. Fresh replacement
air is supplied through background ventilators installed in all living areas
(supplied separately, Section 2.1).
A manual boost switch can be used to increase the ventilation rate, e.g.
when cooking or showering thereby maintaining a comfortable indoor
environment (supplied separately, Section 2.2).
The boost facility can also be triggered from a lighting circuit or by
a range of sensors, including humidity control and PIR movement
detection (supplied separately, Section 2.3).
This product is listed in the Products Characteristics Database (PCDB),
therefore part of the installation process requires that an installation
checklist is completed and submitted to the Building Control Body
(BCB). Blank checklists are available at www.ncm-pcdb.org.uk/SAP. The
nCM (SAP) identifier for this product is Domus CMX.
2.1 Ancillary Items Required
•
220mm x 90mm rectangular or Ø150mm round rigid duct system
(adaptor required) (Section 3.1).
•
CMX-ASK1 or 2404 air supply kits with filter.
2.2 Control Switch Options (Supplied Separately, Wiring
Section 4.2)
•
Manual LOW/BOOST switch, code ANC848A -
Manual BOOST
selection switch. LOW speed is engaged upon connection of mains
supply. Both speeds are manually adjustable at the wiring centre to
facilitate Building Regulation commissioning speeds.
•
Manual OCCUPIED/UNOCCUPIED - LOW/BOOST switch, code
ANC849A -
Manual BOOST and unOCCuPIED selection switches.
OCCuPIED/LOW speed is engaged upon connection of mains supply.
unOCCuPIED speed is intended to be lower than the OCCuPIED/
LOW Building Regulation commissioning speed and should only be
selected when the property is vacant for extended periods such as
holidays in order to save energy but keep the property ‘fresh’. There
is no requirement or value in the Building Regulations for this speed,
so it should be set to suit the individual client’s requirement. All three
speeds are manually adjustable at the wiring centre to facilitate Building
Regulation commissioning speeds.
•
Manual LOW/BOOST/PURGE switch, code ANC850A -
Manual
BOOST and PuRGE selection switches. LOW speed is engaged upon
connection of mains supply. PuRGE speed is intended to be higher
than the BOOST Building Regulation commissioning speed and should
be selected during periods when exceptional levels of indoor pollution
are encountered such overcooked food or paint fumes. The Building
Regulations recommend a 4ach (air change per hour) air flow rate for
this speed but should be set to suit the individual client’s requirement.
All three speeds are manually adjustable at the wiring centre to facilitate
Building Regulation commissioning speeds.
1
AnC848A, AnC849A & AnC850A
2.3 Remote / Automatic Control Options (Supplied
Separately, Wiring Section 5)
•
Adjustable overrun timer, code AnC108A.
•
Humidity control with adjustable overrun timer, code AnC802A.
•
Humidity control with adjustable overrun timer and remote sensor,
code AnC846A.
•
Humidity control with adjustable overrun timer and manual override
with neon indicator, code AnC808A.
•
PIR movement control with adjustable overrun timer, code
AnC813A.
•
6-Switched live backfeed protected junction box, code ELE150R .
2.4 Physical Specification
unit Dimensions
2
Net weight 3.25kg
3.0 INSTALLATION
The following instructions are intended to help prevent hazards.
Installation should only be carried out by a qualified electrician and
competent persons in clean, dry conditions where dust and humidity are
at minimum levels.
We advise installers to fix all mains, switch and
sensor wiring (in accordance with the latest edition of the Wiring
Regulations) prior to fixing the CMX-S appliance in position.
When accepting delivery of the CMX-S appliance, inspect for transit
damage. If in doubt, call our Customer Service team on 03443 715523.
The CMX-S appliance can be fitted directly to a ceiling, wall or suitable
timber support (if loft mounting). It can also be fitted within small
ceiling voids and between joists above 400mm spacing.
Appropriate screw fixings to suit the support medium will need to be
supplied by the installer. The support plate is pre-drilled to suit 4 x 4mm
(no.8) round/pan-head screws and flat washers.
Ensure that there is sufficient space for carrying out any future
maintenance on the appliance.
LAB964R
|
JAnuARy 2021
PAGE 3
