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FAXA-SVX01B-EN
Maintenance
maintenance
procedures
Maintenance Procedures
Before beginning any maintenance
procedures heed all warnings and
cautions.
WARNING
Hazardous voltage!
Disconnect all electrical power
including remote disconnects before
servicing unit. Follow proper lockout/
tagout procedures to ensure power
cannot be inadvertently energized.
Failure to do so can cause death or
serious injury.
WARNING
Disconnect gas supply!
Before servicing unit, FIRST turn off
the gas supply. Failure to turn off the
gas supply can cause death or serious
injury.
Periodic Maintenance Checklist
¨
Inspect optional coil guard for debris
that may be blocking louvers. Clean as
required.
¨
Inspect coil surface for cleanliness.
Clean as required. Refer to “ Coil
Cleaning” under “Maintenance
Procedures.”
¨
Manually rotate fan blades to insure
proper orifice clearance. Inspect fan
orifices for debris and obstructions.
Clean as required.
Annual Maintenance Checklist
¨
Perform all monthly maintenance
inspections.
¨
Perform seasonal start up checks.
¨
Leak test refrigerant circuits. Inspect
contacts of fan motor contactors and
relays. Replace all worn contacts.
¨
Clean condenser fans. Check fan
assemblies for proper orifice clearance,
abnormal end play, and excessive
vibration or noise. Fan motor bearings
are permanently lubricated and do not
require lubrication.
¨
Clean and repaint any corroded
surface.
Periodic Maintenance Procedures
This section describes specific
maintenance procedures that must be
preformed as a part of the normal
maintenance program for this unit. Be
certain to disconnect electrical power to
the unit before performing these
procedures.
Note: the following coil cleaning proce-
dures apply only to the outdoor condens-
ers. Do not use these procedures for the
reheat or evaporator coils.
Cleaning the Condenser Coils
Clean the coil at least once each year or
more frequently if located in a dirty
environment, to help maintain proper unit
operating efficiency. High discharge
pressures are a good indication that the
coil needs cleaning. Follow the detergent
manufacturer instructions as closely as
possible to avoid potential damage to the
coil.
WARNING
Hazardous chemicals!
Coil cleaning agents can be either
acidic or highly alkaline. Handle
chemical carefully. Ensure proper
handling by wearing goggles or face
shield, chemical resistant gloves,
boots, and apron or suit as required.
For personal safety refer to the
cleaning agent manufacturer’s
materials safety data sheet and follow
all recommended safe handling
practices. Failure to follow all safety
instructions can cause death or
serious injury.
To clean the refrigerant coil, use a soft
brush and sprayer, such as a garden
pump or high pressure type, with a
quality detergent; like SPREX AC, OAKITE
161, OAKITE 166, or COILOX.
Note: If detergent is strongly alkaline (i.e.
has a pH value greater that 8.5 ) after
mixing, an aluminum corrosion inhibitor
must be added.
Coil Cleaning Procedure
1. Turn off gas supply to the gas heaters
and disconnect power to the unit.
2. Remove enough panels and
components from the unit to gain
access to the coil.
3. Use a soft brush to remove loose dirt
and debris form both sides of the coil.
4. Straighten coil fins with fin comb as
required.
5. Mix the detergent with water
according to the manufacturers
instructions.
Observe all recommendations of the
cleanser manufacturer. The coil cleanser
manufacturer’s recommendations,
warnings and cautions will at all times
take precedence to these instructions.
WARNING
Hazardous pressure!
Coils contain refrigerant under
pressure. When cleaning coils,
maintain coil cleaning solution
temperature under 150°F to avoid
excessive pressure in the coil. Failure
to follow these safety precautions can
cause coil bursting, which can result in
death or serious injury.
1. Place solution in the sprayer. Be sure to
follow these guidelines if using a high-
pressure sprayer:
a) Minimum nozzle spray angle is 15°.
b) Spray solution at 90° to the coil face.
c) Keep sprayer nozzle at least six inches
form the coil.
d) Sprayer pressure must not exceed
600 psi.
2. Spray leaving air side of the coil first
then spray the entering air side of the
coil. Allow the detergent and water
solution to stand on the coil for five
minutes.
3. Rinse both sides of the coil with cool,
clean water.
4. Inspect the coil. If it still appears dirty,
repeat the cleaning procedure.
5. Reinstall all unit components and
panels, and restore electrical power
and gas supply to the unit.