Unit installation

Maintenance
90 SCXF-SVX01K-EN
9. Replace all panels and parts and restore electrical
power to the unit.
10. Ensure that contaminated material does not contact
other
areas of the equipment or building. Properly
dispose of all contaminated materials and cleaning
solutions.
Refrigerant Coils
1. Disconnect all electrical power to the unit.
2. Wear the appropriate personal protective equipment
(PPE).
3. Access to the coil section of the unit (both sides).
4. Use a soft brush to remove loose debris from both
sides
of the coil.
5. Mix a high quality coil cleaning detergent with water
according
to the manufacturer’s instructions. If the
detergent is strongly alkaline after mixing (pH 8.5 or
higher), it must contain an inhibitor. Carefully follow
the cleaning solution manufacturer’s instructions
regarding product use.
6. Place the mixed solution in a garden pump-up sprayer
or
high pressure sprayer. If using a high pressure
sprayer note the following:
• Maintain
a minimum nozzle spray angle of 15°
• Spray perpendicular to the coil face
• Protect other areas of the equipment and internal
controls from contact with moisture or the cleaning
solution
• Keep the nozzle at least six inches from the coil
• Do not exceed 600 psig
Draining the Waterside Economizer Coil
Drain plugs are in the piping below each coil’s supply and
return header. Use these plugs to drain the coil and piping.
When draining the coil, open the vents at the top of the
supply and return headers. Also, a drain plug is at the
bottom of the inlet condenser manifold and in the outlet
pipe near the unit’s left side. Remove these plugs to drain
the condensers. Be sure to open the vent plugs at the top
of the condenser inlet and outlet manifold. See Figure 24,
p. 32.
When refilling the condenser/waterside economizer coil
system with water, provide adequate water treatment to
prevent the formation of scale or corrosion.
Cleaning the Condenser
Condensing water contains minerals that collect on the
condenser tube walls. Cooling towers also collect dust and
foreign materials that deposit in the condenser tube.The
formation of scale or sludge in the condenser is indicated
by a decreased water flow, low temperature difference
between inlet and outlet water, and abnormally high
condensing temperatures.To maintain maximum
condenser efficiency, the condenser must remain free of
built-up scale and sludge. Clean the condenser either
mechanically or chemically.
Mechanical Cleaning of Condenser and
Economizer Coils
1. Turn off the condenser supply water. Remove drain
plugs discussed in the “Draining the Coil” section.
2. Remove the condenser head to expose the condenser
tubes.
3. Rotate a round brush through the tubes to loosen
contaminant.
WARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives
or other energy storing components provided by Trane
or others, refer to the appropriate manufacturer’s
literature for allowable waiting periods for discharge of
capacitors. Verify with an appropriate voltmeter that all
capacitors have discharged. Failure to disconnect power
and discharge capacitors before servicing could result
in death or serious injury.
For additional information regarding the safe discharge
of capacitors, see PROD-SVB06A-EN
NOTICE:
Coil Freezeup!
Drain and vent coils when not in use. Trane
recommends glycol protection in all possible freezing
applications. Use a glycol approved for use with
commercial cooling and heating systems and copper
tube coils. Failure to do so could result in equipment
damage.
NOTICE:
Proper Water Treatment!
The use of untreated or improperly treated water in a
CenTraVac could result in scaling, erosion, corrosion,
algae or slime. It is recommended that the services of a
qualified water treatment specialist be engaged to
determine what water treatment, if any, is required.
Trane assumes no responsibility for equipment failures
which result from untreated or improperly treated
water, or saline or brackish water.