Catalogue

UH-PRC002-EN 9
Application Considerations
heated air being discharged toward the outside walls. Throw data for standard unit heaters and unit
heaters utilizing optional discharge nozzles is shown in “General Data,” p. 20.
Locations where extreme drafts can affect burner operation should be avoided. Strong drafts may
cause pilot outage. Units with intermittent pilot ignition may be preferable in areas where drafts
are likely.
Minimum clearances required for accessibility and safety are listed in Tab l e 2 , p. 20 .
Mounting Detail
(Hanging Hardware Supplied by Others)
Throw Data
Throw data for units with standard louvers and for units with optional discharge nozzles are in
“General Data,” p. 20. Optional nozzles are for use on propeller fan unit heaters, centrifugal fan unit
heaters and duct furnaces. When greater throw distance is desired, a 45° nozzle is recommended.
For high mounting heights, a 90° nozzle may be used. When wide diffusion is needed, a Y splitter
nozzle should be considered. A five-way nozzle can be used for applications requiring even air
Figure 1. Steel Construction
Figure 2. Wood Construction