NuAire LabGard D NU-543-400, Manual

Page: 40 / 70

OM0283 Page 40 of 70
Rev 2 July/2021
a. To install the supply filter, simply reverse the procedure outlines in Step 3a, above.
Note: Be sure to open the choke plate fully before inserting the filter into the tray.
This will assist in adjusting the airflow.
b. To install the exhaust filter, apply a thin layer of silicone grease to the top and bottom
gaskets of the filter and carefully insert into the exhaust choke tray.
Position the filter frame within the outside walls of the exhaust opening on the top of the hood.
Tighten the spring loaded bolts, 4 places, depressing the gasket material by 1/8 inch (3mm)
Step 5: Motor/Blower Assembly Removal
a. It is recommended that the motor/blower to be removed as a single unit. To remove,
disconnect electrical connections to the motor, remove the HEPEX pressure plenum and
unbolt the motor/blower assembly from the roof of the cabinet (4 places). Always inspect
the rubber isolation motor mounts and replace those that are cracked or visibly show stress.
b. Replace the motor exactly as originally installed in the blower housing, paying particular
attention to the correct electrical connections (see Electrical Schematic).
c. Re-install the new motor/blower assembly.
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