Roberts-Gordon HE15UT - Manual (Page 55)

SECTION 11: V ENTING AND F RESH A IR S UPPLY
49 of 73
SECTION 11: VENTING AND FRESH AIR SUPPLY
11.1 Type C
12
, C
32
& C
62
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 B
22
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
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.
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.
Fresh Air Adapter
Fresh Air
Supply Duct
100 mm OD