Roberts Gorden Blackheat BH15ST Installation & Servicing Instructions Manual Download

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Heater must be vented in accordance with the proper
national and local codes. The fan may vent to the out-
doors either vertically or horizontally (see Figure 20).
For horizontal venting:

1. Vent must exit building not less than 2.1 m above

grade when located adjacent to public walkways.

2. Vent must terminate at least 1 m above any forced

air inlet located within 3 m.

3. Vent shall terminate at least 1.2 m below, 1.2 m

horizontally from, or 0.3 m above any door, window
or gravity air inlet into building.

4. Locate vent terminal at least 3 m from any open-

ing through which vent gases could enter a build-
ing.

5. Use only corrosion resistant materials for the dis-

charge line from the fan to the point of discharge.

6. Vent terminal opening must extend beyond any

combustible overhang.

7. Install vent terminal at a height sufficient to pre-

vent blockage by snow.

8. Protect building materials from degradation by flue

gases.

9. Any portion of flue pipe passing through a com-

bustible wall must be dual insulated or an
approved thimble must be used.

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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. The combined length of flue
run plus fresh air inlet duct should not exceed 16000
mm. Do not use bends in excess of 45°. Consult the
manufacturer if more than 2 x 45° offset bends are
necessary. The flue must be self supporting.

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If the heater is being installed in an area where com-
bustion products can be dissipated within the build-
ing, 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 tube furthest from the wall or
obstruction, i.e. the fan will always blow into the build-
ing or away from the obstruction.

Figure 18.

Flue Connection Detail

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Detailed recommendations for air supply are given in
the relevant National Standards. There must be an
adequate supply of air for both combustion and gen-
eral ventilation. Air vents should have negligible resis-
tance. Do not locate air vents where they can be easily
blocked or flooded, or adjacent to any flues or extrac-
tion systems carrying flammable vapour.

7.4.1

Flued Installation

Where the heater(s) is flued the space containing it
must have a permanent outside air vent with a mini-
mum effective area of 4.5 cm

per kW of heat input. If

mechanical ventilation is employed, the minimum
proven airflow rate shall be 2.35m

/h per kW of heat

input.

If the flue is to be horizontally vented through a wall, a
wind-proof terminal must be fitted to outdoor vent pipe
to prevent a back draught.

7.4.2

Flueless Installation

Minimum airflow rate shall be 37.5m

/h per kW of

total rated heat input where mechanical ventilation is
used. Where the air change rate is below this min-
imum, provide additional openings equal to 52 cm

per kW total rated heat input; or 1.45 cm

for each

/h per kW below 37.5m

/h per kW of total rated

heat input.

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Where necessary, clean air may be ducted into the
burner box through an added spigot on top of the
burner replacing the existing dust arrest baffle plate.

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Fan Assembly