Houghton BELAIRE HB3400 Owner's Manual page 11

Installation of the plenum assembly
⚫ Remove the air filter from the plenum, the both tabs
inwards to push, and then gently shake down;
⚫ Connect the socket and plug of the display panel
wires and the controller wires,please notice that
colors of the wires should be matching( yellow to
yellow, red to red, etc ).
⚫ Attach the plenum assembly to the plenum mounting
bracket by engaging the two parts,you will hear four
clicks to as the parts connect together.
⚫ Fix the plenum assembly on the plenum mounting
bracket with four ST4*19 pan head screws.
⚫ Remove the screw caps from the plenum;
⚫ Fix the plenum assembly on the plenum mounting
bracket with 8 standard equipped countersunk head
screws;
⚫ Install return screw caps to the plenum.
Installation of the air filter
⚫ The side of the air filter to highlight the tabs insert
slots in the plenum;
⚫ Push the air filter upwards until both tabs into slots
of the plenum;
⚫ When heard two clicking sound.
The installation is all completed.
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