Roberts Gorden UHD[X][S][R] 350 Manuel D’Utilisation

15

SECTION 7: AIR SUPPLY
7.1 Separated Combustion Installation
When installed as a separated combustion heater 
(UHD[X]S[R]), the air for combustion is drawn in 
from outside the building.

7.2 Unvented Installation
It is important to ensure that there is adequate fresh 
air supply at all times for both combustion and 
heating requirements in accordance with local and 
national codes. 

WARNING: Combustion by-products contain a 
chemical known to the State of California to cause 
cancer and birth defects or other reproductive harm.

7.3 Building Ventilation
Where ventilation is required, air must be taken from 
an outside point where it is not likely to be 
contaminated or obstructed.

If outside combustion air supply is required, 
separated combustion model (UHD[X]S[R]) heaters 
must be used. 

Caution: If the building has a slight negative 
pressure or corrosive contaminants such as 
halogenated hydrocarbons are present in the air, an 
outside combustion air supply to the heater is 
required. Seal all combustion air pipe joints.
The flexible air duct may have to be insulated to 
prevent condensation on the outer surface. The 
outside air terminal must not be more than 1' (31 
cm) above the vent terminal.

Follow the constraints listed on Page 10, Section 
6.7.