NuAire LabGard NU-560-400, Operation & Maintenance Manual

Page: 42 / 103

OM0295
Rev 2 September 2020 Page 42 of 103
Step 4: To remove the supply filter:
a. Remove plenum screws in front of supply HEPA filter.
b. Lift the permanent plenum and hold up with wire strap.
c. Carefully remove the supply filter.
DIRECT EXPOSURE SHOULD BE AVOIDED, EVEN THOUGH THE FILTER
IS IN AN UNCONTAMINATED PLENUM .
Step 5: To install the supply filter, simply reverse the procedure outlined in the steps above.
7.3.2 Exhaust Filter Replacement
Step 1: Remove exhaust filter access panel, which is held into position by screws. Remove the screws and panel.
Step 2: Locate the external single point release bolt on the top right hand side of the cabinet.
Use a 5/16-inch (8mm) wrench to release the exhaust filter rotating counter clockwise.
Step 3: Carefully remove the exhaust filter.
Dispense of spent HEPA filters properly.
Avoid direct contact to "dirty side" of the filters.
Place in sealed bag and label waste containers/cartons based on the type of
hazard. Follow all Local, State and Federal guidelines for disposal of HEPA
filter solid waste.
When installing the new filter, apply a thin layer of silicone grease to the gasket of the filter and carefully insert
into exhaust chamber. Tighten HEPA seal frame (clockwise) until the gasket is visually depressed by 1/8 inch
(3mm). The procedure for replacing the exhaust filter with the Bag-in/Bag-out option is shown on Drawing
BCD-05660.
7.3.3 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.
7.4 Sliding Window Replacement and Manual Adjustment
The sliding window replacement is accomplished by removing the front decorative panel, control center, and window glide
assemblies. The sliding window adjustment may be required due to everyday use over the life of the cabinet. Both window
glides are adjustable by a set screw and tension screw method. When adjusting the sliding window, be sure to verify
proper micro switch operation. If the sliding window is too loose, it will not properly activate the micro switches, thus
causing potential operational malfunctions to occur.
CAUTION
!
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CAUTION
!