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6
(iii) The fire department is being called.
(iv) You can fight the fire with your back to an exit.
e) TO REDUCE THE RISK OF FIRE, ONLY USE METAL
DUCTWORK.
If the installation is made to rigid or flexible ducting, then
we should recommend the correct diameter ducting is
used to couple to the fan flanges. if it is necessary to bend
the duct at the discharge of the fan, then the bend radius
should be as large as possible.
Before installing the product check the following points:
1. the fan impeller turns freely and
2. there are no obstructions to the airflow
All models include a robust mounting bracket which
enables easy and quick installation of the fan. See Figure
2 installation diagram for 99-NBQ duct fans.
Ductwork connection should be made with duct tape or
duct fast-clamps (available through your local supplier) to
ensure a good seal and secure connection.
Electrical Connection
All 99-NBQ series fans operate from a standard 120V
60Hz AC electrical supply. All wiring must be carried out in
accordance with National Electric Code and all applicable
state and local building codes.
Electrical connections should be made in accordance with
the following diagrams: Figure 3 Electrical wiring.
Maintenance
IMPORTANT: BEFORE CARRYING OUT ANY MAINTE-
NANCE OR SERVICING, ENSURE THAT THE UNIT IS
DISCONNECTED FROM THE MAIN ELECTRICAL SUP-
PLY.
All 99-NBQ series exhaust fans incorporate sealed for life
bearings and therefore so not require any lubrication. We
would recommend inspection of the product at least once
every twelve (12) months to avoid excessive accumulation
of dust and dirt on the impeller. To inspect the unit, discon-
nect from electrical supply and remove the ducting. If any
debris is evident on the impeller, clean with a damp (not
wet) cloth. DO NOT USE any detergents or abrasive mate-
rials for cleaning.
Instructions