Section 11: Venting; General Venting Requirements; Ventilation Requirements - Roberts Gorden Blackheat BH15UT Installation, Operation & Service Manual

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B I
LACKHEAT NSTALLATION

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.

11.1 General Venting Requirements

Flue materials are not included with the heater.
11.1.1 Type C , C & C
12 32
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
dust arrest baffle plate on the heater must be removed
prior to installation. See Page 52, Figure 33.
11.1.2 Type B Appliance
22
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
100 mm flue adapter. Both fresh air supply and flue duct
shall not exceed 10,000 mm. BH15 and BH20 flue must
50 of 75
O S M
PERATION AND ERVICE ANUAL
Appliance
62
be insulated if longer than 5,000 mm. BH25 flue must be
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
83 BWLG 190 x 75 (hole)
90 BWTL 190 x 75 (hole)
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
For design air changes less than 0.5/h following
requirements apply.
Type B heaters
For natural ventilation low level openings must be
provided of at least 2 cm
mechanical ventilation an air change rate of at least 0.5/h
must be ensured.
Type C heaters
Room sealed heaters need no additional building
ventilation.
11.2.2 Flueless Installation (EN 13410)
The installation room must have a volume of at least
10m /kW of installed nominal heat input. A minimum of
3
10m /h of exhaust air per kW of operating heat input must
3
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/m
Vertical
150 mm dia.
150 mm dia.
2 /kW input installed. For
.
3