Microchannel Condenser Coils; Coil Cleaning - Trane Sintesis RTAF Installation, Operation And Maintenance Manual

Maintenance
Important: Do not operate the unit with the sight glass
service valves opened. Close the valves
while running before and after checking the
oil level. Oil system function may be
affected and level reading will not be
accurate during operation if valves are
opened during operation.
4. Attach a 3/8" or 1/2" hose with a sightglass in the
middle to the oil sump service valve (3/8" flare) and the
oil separator service valve (3/8" flare). See
p. 63 for valve locations.
Note: Using high pressure rated clear hose with
appropriate fittings can help speed up the process.
Hose must be rated to withstand system pressures
as found on unit nameplate.
5. After the unit is off line for 30 minutes, move the
sightglass along the side of the oil sump.
6. The nominal oil level from the bottom of the oil
separator should be approximately 4 inches.
Depending on running conditions and oil heater dwell
time, some deviation from nominal levels is expected.
Important: If level is less than 1 inch from the bottom of
the oil separator, contact your localTrane
office.
64

Microchannel Condenser Coils

For proper operation, microchannel condenser coils must
be cleaned regularly. Eliminate pollution and other
residual material help to extend the life of the coils and the
unit.
Regular coil maintenance, including annual cleaning,
enhances the unit's operating efficiency by minimizing
Figure 53,
compressor head pressure and amperage draw.The
condenser coil should be cleaned at minimum once each
year, or more if the unit is located in a "dirty" or corrosive
environment.

Coil Cleaning

Equipment Damage!
Do not use detergents to clean coils. Use clean water
only. Use of detergents on coils could cause damage to
coils.
Cleaning with cleansers or detergents is strongly
discouraged due to the all-aluminum construction. Water
should prove sufficient. Any breach in the tubes can result
in refrigerant leaks.
Hazardous Voltage w/Capacitors!
Failure to disconnect power and discharge capacitors
before servicing could result in death or serious injury.
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.
For additional information regarding the safe discharge
of capacitors, see PROD-SVB06A-EN
1. Disconnect Power to the unit.
No Step Surface!
Failure to follow instruction below could result in death
or serious injury. Do not walk on the sheet metal drain
pan. Walking on the drain pan could cause the
supporting metal to collapse, resulting in the operator/
technician to fall.
Important: Bridging between the main supports
NOTICE:
WARNING
WARNING
required before attempting to enter the unit.
Bridging may consist of multiple 2 by 12
boards or sheet metal grating.
RTAF-SVX001A-EN