1611UDSBD-3GBEN, Pag. 10/36
7. Flue
requirements
Model UDSBD-3 heaters may be installed as Type-B and Type-C installations.
Local requirements may apply in addition to national requirements. These unit
heaters are designed to operate safely and effi ciently with either a horizontal or
vertical fl ue system when installed with the specifi c requirements and instructions.
If this heater is replacing an existing heater, be sure that the fl ue is sized properly
for the heater being installed and that the existing fl ue is in good condition. A
properly sized fl ue system is required for safe operation of the heater. An improp-
erly sized fl ue system can cause unsafe conditions and/or create condensation.
The air heaters may be installed as a balanced fl ue (type C) heater requiring both
a combustion air inlet duct and a fl ue pipe or as a power vented heater (type
B) (the combustion air is taken from the space where heater is installed), which
requires only a fl ue pipe exhausting to outdoors.
All products of combustion must be fl ued to outdoor atmosphere.
Each heater installed as a type B appliance must be fi tted with an individual fl ue
pipe and the combustion air inlet opening is provided with a protection grill. Each
heater installed as a type C appliance must be fi tted with an individual combus-
tion air/fl ue pipe system. Type C2 appliance, with single duct system for supply
of combustion air and evacuation of fl ue gasses, are not allowed.
IMPORTANT :
The fl ue must be installed in accordance with national and local regulations.
Failure to provide proper fl ueing could result in death, serious injury and/or
property damage. The air heater must be installed with a fl ue to the outside
of the building. Safe operation of any power vented gas apparatus requires
a properly operating fl ue system, correct provision for combustion air and
regular maintenance and inspection.
