BLACKHEAT® INSTALLATION OPERATION AND SERVICE MANUAL
SECTION 11: VENTING
WARNING
Carbon Monoxide Hazard
Multiburner systems are not approved for unvented use and must be vented outdoors.
Unitary heaters installed unvented must be interlocked with sufficient building exhaust.
Heaters must be installed according to the installation manual.
Failure to follow these instructions can result in death or injury.
WARNING
Cut/Pinch Hazard
Wear protective gear during installation, operation and service.
Edges are sharp.
Failure to follow these instructions can result in injury.
11.1General Venting Requirements 11.1.1 Type C12 , C32 & C62 Appliance
Room Sealed
The heaters are designed to be installed as room sealed appliances. The flue and air intake are run as separate pipes to the special concentric wall or roof terminal. The wire mesh inside the fresh air adapter on the heater must be removed prior to installation. See Page 52, Figure 33.
11.1.2 Type B22 Appliance
The flue must be fitted with a low resistance terminal. See Page 52, Figure 33.
11.1.3 Flue Installation
The fan outlet may discharge vertically or horizontally. Connection should be made using 100 mm minimum diameter aluminium or stainless steel flue material to National Standard and must be adapted to insert into the
100mm flue adapter. Both fresh air supply and flue duct shall not exceed 10,000 mm. BH15 and BH20 flue must be insulated if longer than 5,000 mm. BH25 flue must be
50 of 74
insulated if longer than 8,000 mm. Contact the manufacturer if more than 2 x 45° offset bends are necessary. The flue must be self supporting.
Fans | Horizontal | Vertical |
83 BWLG | 190 x 75 (hole) | 150 mm dia. |
90 BWLG | 190 x 75 (hole) | 150 mm dia. |
11.1.4 Flueless Installation
If the heater is being installed in an area where combustion products can be dissipated within the building, ensure that the fan outlet is horizontal and away from the burner. Where installation is close to a wall
(perimeter system) or other obstruction close to the fan outlet or wall angle mounted, install the heater so that the fan tube is the furthest away from the wall or obstruction, i.e. the fan will always blow into the building or away from the obstruction.
11.2 Ventilation Requirements
Detailed recommendations for air supply are given in the relevant National Standards. There must be an adequate supply of air for both combustion and general ventilation. Air vents should have negligible resistance. Do not locate air vents where they can be easily blocked or flooded, or adjacent to any flues or extraction systems carrying flammable vapour.
11.2.1 Flue Installation
Where the heater(s) is flued, the space containing it must have a permanent outside air vent with a minimum effective area of 4.5 cm2 per kW of heat input. If mechanical ventilation is employed, the minimum proven airflow rate shall be 2.35 m3/h per kW of heat input.
If the flue is to be horizontally vented through a wall, a
11.2.2 Flueless Installation (EN 13410)
The installation room must have a volume of at least
10m3/kW of installed nominal heat input. A minimum of 10m3/h of exhaust air per kW of operating heat input must be ventilated out of the installation room by either thermal or mechanical evacuation. Appropriate exhaust and fresh air openings must be provided and exhaust fans interlocked with the operation of the heating equipment. Further no exhaust system is necessary if the building air change rate is greater than 1.5 per hour or the density of operating heat input is not greater than 5 W/m3.