Lacanche FMH Installation, Operation & Maintenance Instructions Manual - page 3
FMH Range Hoods
W1103 Revision: 14/10/2011
3
SECTION 1. INTRODUCTION
Your range cooker is a semi-professional unit which gives you the power and
flexibility to realise your full potential in the kitchen. Inevitably, during the
cooking process, there will be heat, vapours and fumes produced. Your FMH
extractor has been designed to complement the range cooker both in looks
and performance in order to create the ideal environment for creative cook-
ing.
SECTION 2. EXTRACTION PERFORMANCE
This hood is designed for ducting out, i.e. duct to an outside wall. To obtain
the best possible extraction performance use 150mm diameter ducting or
larger. Wherever possible utilise rigid circular pipe or a flat channel equivalent.
Avoid using flexible ducting (except for runs of less than 1.5m) as this is not
smooth on the interior and can cause air flow restrictions. Semi rigid ducting
can be used. Please note ducting kits and ducting components are optional
accessories and have to be ordered - they are not supplied with the hood.
The most important influence on the performance of the extractor is the de-
sign of the ducting which takes the exhaust air from the extractor to the out-
side wall louvre. The duct route should be a prime consideration during the
initial stages of the kitchen design. Please note the following:
The extractor is provided with a spigot suitable for connecting 150mm
diameter duct. *
Note: 150mm is the minimum duct diameter consistent with efficient
extraction.
The exhaust duct route length should be kept as short as possible with
as few bends as possible.
The most efficient configuration is to duct straight through an outside
wall so try to position the cooker against an outside wall when designing
your kitchen layout.
The hood can be vented either to the top exhaust or the rear exhaust
position. Use the position which gives the shortest duct route length and
least number of bends. (The blower will need to be rotated for ducting
directly through the rear exhaust position.)
A route with more than two 90
o
bends will significantly degrade the per-
formance of the extraction system. If possible, avoid having a 90
o
bend
at the extractor exhaust spigot; keep bend radii as large as possible to
maintain a smooth airflow without vortices; avoid kinks in flexible duct-
ing; pull flexible ducting taut over straight runs to ensure that the internal
surface is as smooth as possible.
Duct runs in excess of 5 metres are not recommended and will seriously
impair efficiency - if you are concerned then please call for advice.
SECTION 3. IMPORTANT INFORMATION
The following minimum headroom is required to accommodate the cooker
and hood:
The minimum distance between the range hob burners and the bottom of the
extractor is essential to prevent overheating of the extractor and its compo-
nents.
If you are fitting a splashback then the cooker-to-hood clearance is dictated
by the splashback height (unless you choose to run the splashback down
behind the cooker). Splashbacks are best fitted before the hood.
Please also note that a 90
o
bend in the flexible ducting will require 215mm
minimum headroom to give a smooth radius with no kinking.
Requirements of the relevant authorities concerning the discharge of exhaust
air must be complied with.
Attention:
This appliance requires an earth connection.
Ensure that the supply voltage corresponds to that marked on the rating label
inside the extractor.
The extractor must be isolated from the electrical supply before carrying out
any cleaning or maintenance operations.
Pay particular attention to fire risk when frying. To minimise the risk of
fire, all instructions relating to cleaning the grease filters and removing
grease deposits must be adhered to.
Do not flambé under the extractor.
SECTION 4. INSTALLATION
Do not throw away the box and any internal packaging until installation
is fully completed -
the packaging may be required in the unlikely event that
hood must be returned.
4.1 Remove the Grease Filters
Place extractor on its backplate on a horizontal surface.
To remove the grease filters pull/lift the filter release lever away from the
hood base. This releases the retaining clips allowing the filter to be carefully
lifted away from the hood. Take care not to scratch the hood.
The internal fixing holes, blower assembly and spigot blanking plate can now
be accessed through the opening in the baseplate. *
4.2 Blower Exhaust Position
The hood can be vented either to the top exhaust or the rear exhaust posi-
tion. Each exhaust position has 4 fixing points onto which can be attached
either the blower assembly or a blanking plate. *
Position the blower assembly in the chosen exhaust position and the blanking
plate in the unused position using the original fixings and washers supplied .*
When changing the exhaust position, care should be taken not to excessively
pull or twist the cable attached to the blower.
4.3 Duct Installation
Make holes in the wall or ceiling to take the 150mm diameter ducting from the
extractor exhaust spigot to the outside. *
The exhaust duct route length should be kept as short as possible with as
few bends as possible - see Section 2.
An external weather louvre designed for connection to 150mm ducting or
larger should be used to terminate ductwork on an external wall - an airbrick
must never be used.
* 1400mm, 1500mm & 1800mm wide internal fan models have two sets
of blower assemblies and blanking plates. The 2200mm wide model has
3 blower assemblies. Each blower assembly has a separate exhaust
spigot for independent ducting to the outside - i.e. you must run 2 or 3
separate 150mm ducts.
FMHE Models supplied for connection to the high performance external
fan are supplied with two exhaust spigots fitted - two 150mm ducts
should be run to the external fan which has it’s separate installation
instructions.
Cooker-to-hood clearance (minimum):
Recommended clearance range
750 mm
800 - 850 mm
Hood height including standard chimney:
592 - 745 mm
Minimum ceiling height with standard chimney:
2242mm
The exhaust air must not be discharged into a flue which is used for exhausting
fumes from appliances supplied with energy other than electricity, e.g. oil or gas-
fired central heating boilers, gas-fired water heaters, etc.
Warning
The following is a requirement of UK and European legislation and
is in the interests of your safety.
If the room where the cooker hood is to be used contains a fossil fuel
burning appliance such as a gas or oil central heating boiler, then its flue
must be of the room sealed or balanced flue type. A ducted hood is not
suitable for use in a room where any open flue is in use, as dangerous
fumes of combustion can be sucked back in to the room. This would
include the following open flue appliances – central heating boilers, coal
fires, log fires, gas fires, wood burning stoves etc. Therefore, if you have
an open flue fossil fuel burning appliance in your kitchen, you are
automatically compelled to select a hood that is capable of working in
recycling mode.
FMH Range Hoods