9
OPERATING CONDITIONS
• The appliance is designed for use indoors and at
ambient temperatures b30 and +50°C, in
unrestricted, and dust-free and chemical-free air.
• When designing the ventilation system, bear in
mind that air temperature at the outlet must be
below 50°C and that the air speed through the
heating elements must be at least 2 m/s.
• Electrical connections box protection rating:
IP43.
• Install an air filter upstream from the air heater to
prevent inflammable dust particles from sticking
to the heating elements.
INSTALLATION
• Always install the air heater in the ventilation system
downstream from the fan and at a distance of at
least one metre from it.
• The noise filter and/or air filter must be fitted at a
distance from the air heater equivalent to at least
twice the diameter of the duct.
• The air heater must be in contact with walls of the
duct through the full 360°.
• If you have to install the air heater at the end of a
duct, cover the duct outlet with a suitable safety
grille.
• The air heater must be securely fixed to the duct so
that it cannot fall.
• The air heater must be insulated with non-
inflammable material as required by the safety
standards of the country where it is installed.
• Connect the electrical heating elements to a single
phase power supply.
• The cover of the electrical connections box must be
easily accessible in order to reset the safety
thermostat.
• To optimise use of the heating elements, controllers
may be used to match thermal power to the room's
temperature requirements.
• The direction of air flow is not important.
• The air heater must be installed so that it functions
in conjunction with a fan and is only switched on
when the fan is functioning.
OVERHEATING
If the appliance overheats and the safety thermostat
strips, it can be reset manually. Switch off mains
power before removing the cover from the
connections box. This operation must only be
performed by authorised personnel
MAINTENANCE / CLEANING
• This appliance does not require any special
maintenance except periodic checks for correct
functioning.
• Switch off mains power before performing any
maintenance. At least once a year inspect the
heating elements and remove any build-ups of dust
and dirt.
• Do not use solvents, and take care not to damage
delicate electrical components when performing
cleaning.
307E.qxp 13/04/2007 12.01 Pagina 9
