Domus MTD 070B User manual

Installation Instructions
MAYFAIR
Wall/Ceiling Fan
NOTICE
PLEASE READ
INSTALLATION IN-
STRUCTION
BEFORE INSTALLING
ISSUE 3
LAB305R
TO PROFESSIONAL INSTALLERS:
Please leave this instruction booklet with the fan
on completion of the installation.
WARNING
Isolate power supply before removing front cover or cleaning fan unit.
TIMER ADJUSTMENT
All models with timers
To adjust the timer, the front cover must be removed. To do this, remove the retaining screw on the bottom
edge and lift off cover. It is not necessary to remove the fan from its mounting. The timer adjuster is clearly
marked. With a small screwdriver turn anti-clockwise for less overrun time. The timer range is approximately
30 seconds to 25 minutes.
CONDENSATION CONTROL ADJUSTMENT
All models with condensation controls
To adjust the condensation control, the front cover must be removed. To do this remove the retaining screw
on the bottom edge and lift the cover off. It is not necessary to remove the fan from its mounting. The conden-
sation control adjuster is clearly marked. With a small screwdriver turn anti-clockwise for less sensitivity and
clockwise to increase sensitivity. The condensation control range is from 50% RH to 90% RH. The control is
set approximately half way at the factory. The condensation control may be tested by breathing through the
sensor grille on the front cover.
Note. There is a short delay between breathing through the grille and the fan starting. Do not use steam from
a kettle to test the unit.
CLEANING/MAINTENANCE
From time to time the fan unit will need cleaning. To do this, first isolate power supply. Remove front cover as
described above. Remove the fan from its mounting by undoing the four corner screws. Dust the fan from its
mounting by undoing the four corner screws. Dust the fan unit with a dry brush. Do not immerse in water. The
front cover can be washed in warm soapy water. The filter fitted in filtered fans can be washed by hand in warm
soapy water. Hang filter up to dry. Do not wring. The inlet/retaining grille can be washed as the front cover.
GUARANTEE
This product is guaranteed against faulty manufacture for a period of two years.
WARNING: Failure to comply with installation instructions and
cautionary notes may invalidate warranty.
Further Information
This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction
concerning use of the appliance by a person responsible for their safety.
VENTILATIO
N
Domus Ventilation
Cambria House
Caerphilly Business Park
Van Road
Caerphilly
CF83 3ED
Tel: [phone]
Fax: [phone]
Email: [email protected]
www.domusventilation.co.uk
VENTILATION

The Mayfair is a cartridge type centrifugal extractor fan. It is fitted with a maintenance free
rubber mounted motor. The cartridge system permits the fan to be removed from the wall or
ceiling without disturbing the ductile wiring or wall fittings. The facility greatly simplifies main-
tenance and cleaning procedures.
On new build and renovation projects the Mayfair 2000 fan permits all the installation work
to be carried out in advance of the fan being fitted, thereby reducing the possibility of theft
or damage. The Mayfair 2000 range is available with a wider range of features than any other
extractor fan. It is a high quality product and will give many years of reliable service.
APPLICATION
BATHROOMS, TOILETS, UTILITY ROOMS, LOBBIES AND HALLWAYS
The Mayfair 2000 complies with all current Building Regulations.
Description
Model 70 70m3/h (20 l/s) - 43m3/h
Extract
Volume
High Speed
Extract
Volume
Low Speed
Options
Single Speed
Single Speed/Pull-Cord
Single Speed/Time Delay
Twin Speed
Twin Speed/Time Delay
Single Speed/Condensation
Control/Time Delay
Twin Speed/Time Delay/Condensation Control for
Remote Switching with Additional Pull-Cord Boost
Single Speed/
Infra Red Control
Model 70
MSS 070B
MPC 070B
MTD 070B
MTS 070B
MTT 070B
MCC 070B
MCT 070B
MIR 070B
Product Codes
Models
S/L
N
P/L
OPERATING SWITCH
ISOLATOR SWITCH
N
L
FRAME TERMINALS
S/L = SWITCH LIVE
N = NEUTRAL
P/L = PERMANENT LIVE
MTD 070B
MTS 070B
MTT 070B
MCC 070B
MCT 070B
NOTE: THE OPERATING SWITCH MUST BE SINGLE POLE

SURFACE MOUNTED
For installation on either wall or ceiling, follow the same procedures as frame mounted fans with the exception that the discharge
duct needs to be flush with the surface of the inside wall or ceiling, to meet up with the discharge outlet of the surface mounting
box.
Please refer to the following pages for relevant wiring diagrams. When fitting into surface mounting box it is necessary to remove
the fan motor cover. To do this, remove the motor cover retaining screw. Ease front cover clear of the two clips. The motor cover
may be discarded.
To fit the fan into the surface mounting box, first remove it’s front cover. This is retained by a screw on the bottom edge. Enter
the electrical contact pins and discharge spigot into their sockets and push gently into position. Retain the fan with four 6mm
screws supplied. Refit front cover.
WARNING: ISOLATE ELECTRICITY SUPPLY BEFORE COMMENCING WORK
WIRING REQUIREMENTS FOR DOMESTIC ELECTRIC FANS
It is recommended that fans be connected into the lighting circuit (see caution note on page 10) with double pole (3mm) isolation,
provided before the room light switch and suitably fused, in accordance with I.E.E. Regulations.
Wall and ceiling mounted fans for fixed wiring should be connected to the power supply via a cable with solid conductors of 1 to
1.5mm2only.
IF IN DOUBT CONSULT A QUALIFIED ELECTRICIAN
IMPORTANT
Surface mounting box (FLA 106A) and flat duct systems are manufactured from sheet metal and therefore require earthing.
NOTE
The Mayfair 2000 extractor fan and its mounting systems (with the exception of the above) are double insulated and do not require
earthing. The mounting system is provided with an earth termination for convenience only.
Wiring Installation
S/L
N
S/L
N
OPERATING SWITCH ISOLATOR SWITCH FRAME TERMINALS
S/L = SWITCH LIVE
N = NEUTRAL
L
N
L
N
ISOLATOR SWITCH FRAME TERMINALS
L = LIVE
N = NEUTRAL
Models
MSS 070B
Models
MPC 070B
MIR 070B
A guide to
Ventilation
WHERE TO SITE YOUR FAN
Incorrect siting of an extractor fan can se-
verely impair its efficiency. It is therefore
important that the fan is correctly sited
using the following principles:
• To ensure maximum air flow through
the whole room, mount in the wall or
ceiling furthest from the air inlet point
and at high level.
• Do not position a fan where tempera-
tures are likely to exceed 40ºC.
• When installing in a room with an
open fire or stove without a balanced
flue, ensure that there is sufficient
replacement air to prevent the fan
drawing air back down the flue.
• A 230 Volt fan installed in a bathroom
must not be within reach of a person
using the bath or shower.
• Always use an in-Duct or Low Voltage
Fan (SELV) to ventilate a shower cubi-
cle
WARNING:
Positioning the fan unit must be so as to
avoid the back flow of gases from open
flue or other open fire appliances.
Also to prevent combustion gases enter-
ing the air inlet, the air inlet must not be
positioned above or within 11/2metres of
a combustion flue vent.
Building Regulation Requirements
Room Extract Rate
Bathroom/shower room 54m3h (15 l/s)
with or without toilet
Toilet 21.6m3h (6 l/s)
Non domestic sanitary 21.6m3h (6 l/s)
accommodation (and/or per w/c or 3 air
washing facilities) changes per hour.
Rooms without opening windows require fans
to be fitted with 15 minute overrun timers.
NOT FOR USE IN SHOWER CUBICLES OR ABOVE BATHS FITTED WITH A SHOWER.
MAX ROOM TEMPERATURES 40ºC
A guide to Ventilation

Single Speed MSS 070B.
Single speed fans requiring external switching.
Single Speed MPC 070B.
with pull/cord Single speed fans with integral pull-cord switch.
switch
Single Speed MTD 070B.
with time delay Single speed fan with integral adjustable timer.
Normally operated via light switch.
Twin Speed MTS 070B, MTS 100B
Twin speed fans designed to run on slow speed when room is unoccupied and on high
speed when room is occupied.
Normally operated via light switch.
Twin Speed MTT 070B.
with time delay Twin speed fans designed to run on slow speed when room is unoccupied and on high
speed when room is occupied. This product has an adjustable overrun timer that allows the
fan to run on high speed for a set time after the room has been vacated. Normally operated
via light switch.
Single Speed MCC 070B.
with condensation Adjustable condensation control turns fan on automatically when
control and humidity reaches a preset level and off when humidity drops
time delay below that level. When not operating on humidity the fan functions at the single speed with
time delay. Manual operation is normally via the light switch.
Twin Speed MCT 070B.
with time delay/ Adjustable condensation control switches onto slow speed
condensation control when humidity reaches a preset level and off when humidity drops
for remote switching below that level. The fan can be switched onto high speed (boost)
with additional using a remote switch (normally via a light switch). When the high
pull-cord boost speed is turned off an adjustable timer keeps the fan running on high speed for a preset
time. Alternatively the fan can be switched on to high speed using the integral pullcord
switch. The pullcord switch works independently from the remote switch. When either the
remote switch or pullcord switch is operated a red indicator is illuminated.
Single Speed MIR 070B.
infra red control These fans are operated by a passive infra-red sensor detecting
(P.I.R.) movement. The range of the sensor is about 5 metres with an operational arc of 15 degrees
from the centre of the sensor. The control unit features an adjustable timer. This allows the
fan to run for a preset time after the last movement within the range of the sensor has been
detected. Important: Passive infra red operated fans must not be installed above a
heater or radiator.
Product Function Guide
ELECTRICAL SUPPLY
230V ac ~ 50HZ
MODEL
070
SLOW SPEED
20W
HIGH SPEED
35W
WALL MOUNTED
In the chosen position (as high on the wall as possible) cut a hole through the wall to take a 100mm duct for the fan
discharge. This should slope downwards towards the outside to allow for condensation drainage.
When this is done, position the building-in frame with the discharge outlet at the top right over the duct hole. Mark
around the frame and cut an aperture to take the frame and fan. It is important that the front edge of the frame is flush
with the surface of the wall.
If fitting in a solid wall the aperture should be at least 115mm deep. If installing in a cavity wall with loose thermal
insulation you will need to make a cavity liner.
When all the cutting is done, grout the frame into position making sure that the front edge of the frame is flush with
the wall. When the frame is in position, fit the discharge duct into position from the outside and trim to length. Before
grouting into position, seal the duct to the building-in frame spigot. When duct is in position fit discharge grille.
While fitting the building-in frame, provision must be made for the power supply cable.
To fit the fan, first remove the front cover, this is retained by a screw on the bottom edge. Enter the electrical contact
pins and discharge into their sockets and push gently into position. Retain fan with the four 6mm screws supplied.
Refit front cover.
Installation using building-in frame - May 905B
CEILING MOUNTED
Select a suitable position on ceiling for fan. Ensure that the chosen position is between and square to the roof joists. Using
the building-in frame as a template, mark and cut out the square hole to fit the frame into. Cut and fit two noggins to fit
between the joists. Position them alongside the frame aperture so they will support the frame when it is in position. Fit the
frame into position ensuring the front edge is flush with the ceiling surface. Secure firmly by screwing through the holes in
the side of the frame into the joists or noggins.
The discharge from the fan may be ducted through a roof cowl or through the eaves. If ducting through a cowl, provision
must be made for condensation drainage. A condensation trap can be made from flexible ducting as illustrated or you may
use a purpose made product.
If discharge is to exit through the eaves, the duct must slope downwards towards the outside to allow for condensation
drainage. To ensure maximum efficiency from the fan, flexible ducting and bends must be kept to a minimum.
To fit the fan first remove the front cover. This is retained by a screw on the bottom edge. Enter the electrical contact pins
and discharge into their sockets and push gently into position. Retain fan with the four 6mm screws supplied and refit the
front cover.