72 CLCH-SVX013B-EN
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.
WARNING
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.
Maintenance Checklist
Table 16.Maintenance Checklist
Frequency Maintenance
Every week
• Observe unit weekly for any change in running condition and unusual noise.
Every month
• Clean or replace air filters if clogged or dirty; coat permanent filters with oil after cleaning; change bag filters when pressure drop is
1 in. w.g. See “Filters,” p. 76 for more information.
Every three to
six months
• Inspect and clean drain pans. See “Drain Pans,” p. 75 for more information.
• Tighten electrical connections.
• Inspect coils for dirt build-up. See “Coils,” p. 73 for more information.
• Clean moisture eliminator with high pressure sprayer. Remov
e pollen in the spring and leaves in the fall.
Every year
• Inspect the unit casing for corrosion. If damage is found, clean and repaint.
• Clean the fan wheels and shaft. See “Fans,” p. 75 for more information.
• 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.
• 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 “Motor Bearing Lubrication,” p. 76 for more
in
formation
).
• 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 pe
rsonal protective
equipment, use a brush for sheet metal surfaces or a
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 g
oing into a dry
section of the unit and/or system ductwork.
4. Thoroughly clean the contaminated area(s) with an
EP
A-approved san
itizer specifically designed for HVAC
use.
5. Rinse the affected surfaces thoroughly w
ith 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
in
to service.
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