The Selas AHP series of indirect air heat exchangers are designed for commercial air heating applications. The robust construction of the units makes them an ideal heat source for shopping centers and commercial premises. AHP heaters are usually fitted with a high temperature limit thermostat or thermocouple unit, in order to protect the heat exchanger from excessive overheat.
The standard AHP heaters consist of a heat exchanger module with combustion chamber, primary tube bank and a two pass economizer section. The heat exchanger section is generously rated for heat transfer surface area; a transfer rate of 12.62 kW. Per M3 has been used for the design. The combustion chamber and the tube banks are manufactured using high-grade stainless steels and both the chamber and tube bank assembly are independently mounted to cater for differential expansion. The outer casing of the AHP unit is manufactured from standard carbon steel and is of an uninsulated construction. The complete inner assembly can be withdrawn on the front plate for repair or servicing, and the tube banks are fitted with an end inspection cover.
Burner Assemblies
Each AHP unit is supplied with a pre-packaged and pre-wired burner assembly which includes all of the necessary burner fuel safety valves, pressure switches and automatic ignition and flame safety equipment. Burners supplied are usually of the modulation type however burners built to application specifications and country of installation can be fitted. All Burner packages are fully tested and the operation of all components are checked before dispatch from the factory.