SECTION 11: VENTING AND FRESH AIR SUPPLY
SECTION 11: VENTING AND FRESH AIR SUPPLY
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.
flue must be self supporting. Suitable terminals must be fitted for horizontal and vertical flue.
In order to locate fans that are not IP54 protected away from the wet environment, a 100 mm diameter extension tube between the heat exchanger end and fan must be installed. This length must be subtracted from the maximum flue length.
Fans | Horizontal | Vertical |
83 BWLG | 190 mm x 75 mm (hole) | 150 mm dia. |
90 BWLG | 190 mm x 75 mm (hole) | 150 mm dia. |
11.4 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.
11.5 Fresh Air Supply
The burner is equipped with a fresh air adapter which has a silicone gasket incorporated. This adapter accepts tubes with 100 mm outside diameter.
100 mm OD |
| |
Fresh Air | Fresh Air Adapter | |
Supply Duct | ||
|
11.1 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 51, Figure 31.
11.2 Type B22 Appliance
The flue must be fitted with a low resistance terminal. See Page 51, Figure 31.
11.3 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 100 mm flue adapter. Both fresh air supply and flue duct shall not exceed 10,000 mm. HE15 and HE20 flue must be insulated if longer than 5,000 mm. HE25 flue must be insulated if longer than 8,000 mm. For each 90° bend, subtract 1,000 mm from the maximum flue length. The
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