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Routine Maintenance
WARNING
Hazardous Service Procedures!
The maintenance and troubleshooting procedures
recommended in this manual could result in exposure
to electrical, mechanical or other potential safety
hazards. Always refer to the safety warnings provided
throughout this manual concerning these procedures.
Unless specified otherwise, disconnect all electrical
power including remote disconnect and discharge all
energy storing devices such as capacitors before
servicing. Follow proper lockout/tagout procedures to
ensure the power can not be inadvertently energized.
When necessary to work with live electrical
components, have a qualified licensed electrician or
other individual who has been trained in handling live
electrical components perform these tasks. Failure to
follow all of the recommended safety warnings
provided, could result in death or serious injury.
Maintenance Checklist
Table 16.Maintenance Checklist
Frequency
Maintenance
Every week
• Observe unit weekly for any change in running condition and unusual noise.
• Clean or replace air filters if clogged or dirty; coat permanent filters with oil after cleaning; change bag filters when pressure drop is
Every month
1 in. w.g. See
• Inspect and clean drain pans. See
Every three to
• Tighten electrical connections.
six months
• Inspect coils for dirt build-up. See
• Clean moisture eliminator with high pressure sprayer. Remove pollen in the spring and leaves in the fall.
• Inspect the unit casing for corrosion. If damage is found, clean and repaint.
• Clean the fan wheels and shaft. See
• Inspect and clean drain pans.
• Check damper linkages, set screws, and blade adjustment. Clean, but do not lubricate, the nylon damper rod bushings.
• Clean damper operators.
• Inspect electrical components and insulation.
Every year
• Inspect wiring for damage.
• Rotate the fan wheel and check for obstructions. The wheel should not rub. Adjust the center if necessary.
• Lubricate motor bearings in accordance with motor manufacturer's recommendations (see
information).
• Check condition of gasketing and insulation around unit, door and dampers.
• Examine flex connections for cracks or leaks. Repair or replace damaged material.
Cleaning the Unit
Cleaning Non-Porous Surfaces
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Failure to disconnect power
before servicing could result in death or serious injury.
If microbial growth on a non-porous insulating surface
(closed cell insulation or sheet metal surface) is observed:
1. Disconnect all electrical power to the unit.
2. Wearing the appropriate personal protective
equipment, use a brush for sheet metal surfaces or a
72
"Filters," p. 76
for more information.
"Drain Pans," p. 75
"Coils," p. 73
"Fans," p. 75
Rotating Components!
The following procedure involves working with
rotating components. Disconnect all electric power,
including remote disconnects before servicing. Follow
proper lockout/ tagout procedures to ensure the power
can not be inadvertently energized. Secure rotor to
ensure rotor cannot freewheel. Failure to secure rotor
or disconnect power before servicing could result in
rotating components cutting and slashing technician
which could result in death or serious injury.
for more information.
for more information.
for more information.
soft sponge on a foil face or closed cell foam surface to
mechanically remove the microbial growth.
Note: Be careful not to damage the non-porous surface of
the insulation.
3. Install a block-off to prevent spray from going into a dry
section of the unit and/or system ductwork.
4. Thoroughly clean the contaminated area(s) with an
EPA-approved sanitizer specifically designed for HVAC
use.
5. Rinse the affected surfaces thoroughly with fresh
water and a fresh sponge to prevent potential
corrosion of the drain pan and drain line
6. Repeat steps 4 and 5 as necessary.
7. Confirm the drain line is open following the cleaning
process.
8. Allow the unit to dry thoroughly before putting it back
into service.
WARNING
"Motor Bearing Lubrication," p. 76
CLCH-SVX013B-EN
for more
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