Test procedures including flash testing of elements and mechanical testing are carried out on all products and together with constant training will keep AAH’s quality high and up to date with our customers requirements. Records are kept of all units in order that any replacement parts can be supplied.
Test certificates are available on request.
All heaters are fitted as standard with a manual thermal cut-out which cuts out the heater in the event of an airflow failure. It is important to ensure that the cut-out remains operational.
All systems should have an isolator switch which can be locked in an off position.
Care must be taken to position the heater to prevent any damage or overheating of any other piece of equipment in or near the system.
All installation and maintenance should be carried out as prescribed by the current I.E.E. regulations.
The heaters are constructed from pre-galvanised steel with 20mm knock-out conduit holes and an earth stud.
Elements consist of nichrome spiral resistance wire surrounded by magnesium oxide powder and sheathed in stainless steel. The elements are evenly distributed over the area of the duct to ensure even heat distribution.
The surface temperature of the elements is designed to be 400°C at an air velocity of 2.5m/s. Where multiple elements are required they shall be linked by copper bus bar or teminated with electrical connectors.