10
VENTILATION AND CO BUSTION AIR
REQUIRE ENTS
t is imperative that there is sufficient air supply to
the burners of the cooker in order to support
combustion.
Detailed recommendations for air supply are given
in BS 5440 Part 2. The minimum effective air
requirement for this appliance is 215 cm2(100K) or
185cm2(80K). When calculating combustion air
requirements for this appliance use the following
equation: 5cm2per each kW of rated input above 7
kW.
f there is another combustion appliance fitted in the
same or adjacent room, it will be necessary to refer
to B.S. 5440: Part 2 to calculate the additional air
supply.
All materials used in the manufacture of air vents
should be such that the vent is dimensionally stable
and corrosion resistant.
The effective free area of any vent should be
ascertained before installation. The effect of any
screen or grills should be allowed for when
determining the effective free area of any vent.
Air vents direct to the outside of the building should
be located so that any air current produced will not
pass through normally occupied areas of the room.
An air vent outside the building should not be
located less than the dimensions specified within the
Building Regulations (see Technical Data) from any
FACTORY ADE INSULATED CHI NEYS
Factory-made insulated chimneys should be
constructed and tested to meet the relevant
standards and recommendations given in:
* B.S. 7566 - nstallation of factory-made
chimneys conforming to B.S. 4543 for
domestic appliances.
Part 1: Method of specifying installations
design information.
Part 2: Specification for installation design.
Part 3: Specification for site installation.
Part 4: Recommendation for installation
design and installation.
Parts 1, 2 &3 should be used. The liner should be
secured at the top and bottom by using closure/
clamping plate firmly sealed and secured and an
approved low resistance terminal used at the top.
t is essential that every flue system be inspected
and tested by a competent person for its correct
effectiveness, to ensure that the combustion
products are completely discharged to the outside
atmosphere.
part of any flue terminal. These air vents must also
be satisfactorily fire proofed as per Building
Regulations.
Air vents in internal walls should not communicate
with bedrooms, bedsits, toilets, bathrooms or rooms
containing a shower.
Air vents traversing cavity walls should include a
continuous duct across the cavity. The duct should
be installed in such a manner as not to impair the
weather resistance of the cavity.
Joints between air vents and outside walls should
be sealed to prevent the ingress of moisture.
Existing air vents should be of the correct size and
unobstructed for the appliance in use.
f there is an air extraction fan fitted in the room or
adjacent rooms where this appliance is fitted,
additional air vents will be required to alleviate the
possibility of spillage of products of combustion
from the appliance/flue while the fan is in operation.
Refer B.S. 5440 Part 2, .S. 813 and the Gas Safety
( nstallation & Use) Regulations as amended.
Where such an installation exists, a test for spillage
should be made with the fan or fans and other gas
burning appliances in operation at full rate. (i.e.
extraction fans, tumble dryers) with all external
doors and windows closed.
f spillage occurs following the above operation, an
additional air vent of sufficient size to prevent this
occurrence should be installed.
OUTSIDE AIR CONNECTION
f this option is used additional air as indicated in BS
5440, Part 2 is not required.
1. This appliance may be connected direct to the
outside of the house for its combustion air
supply.
2. Remove the blanking plate located at the back
right hand corner and remove the primary air
grill located at the front and right hand corner.
Fix blanking plates over the front primary air
inlet. (See fig. 12 & 13) and the right hand side
primary air inlet.
3. Connect the optional 125mm (5”) spigot to the
base, see fig. 13.
4. To connect this appliance to an outside air
supply use either 125mm (5”) rigid or flexible
stainless steel pipes or non-combustible
corrosion-resistant materials not more than
965mm (38”) in length and having no sharp
bends or corners other than the down turn at
the terminus.