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7
Ducts & Fittings
4 star units install the thermistor into the discharge air duct
between two and three metres from the outlet of the unit.
Ductwork should be sized to suit the heater and installation to
prevent excessive back pressure.
Supply Air Duct to have 2-3m straight section before any bends or Y junctions.
Do not squash ductwork to fit through
an opening, as airflow will be
restricted. Find a better location.
If more than 6m of flexible ductwork is
required in one length, the next
available size flexible duct must be
used.
Return Air Grille
Locate the return air grille in a central heated area. Where a zoned installation is
planned ensure the return air grille is located in a common zone which cannot be
isolated.
33
Roof Installation
Part 5442225 issue E
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