RT-SVX36K-EN 77
Unit Replacement
This section covers the removal and preparation that is
necessary to set the R-410A replacement unit in place.
Precautionary Measures
• Avoid breathing fiberglass dust.
• Use a NIOSH approved dust/mist respirator.
• Avoid contact with the skin or eyes.Wear long-sleeved,
loose-fitting clothing, gloves, and eye protection.
• Wash clothes separately from other clothing: rinse
washer thoroughly.
• Operations such as sawing, blowing, tear-out, and
spraying may generate fiber concentrations requiring
additional respiratory protection. Use the appropriate
NIOSH approved respiration in these situations.
First Aid Measures
Eye Contact - Flush eyes with water to remove dust. If
symptoms persist, seek medical attention.
Skin Contact - Wash affected areas gently with soap and
warm water after handling.
Electrical Connection
Main Electrical Power
Lock and tag out unit main electric power and remove
power supply wiring from installed disconnect/terminal
block of unit. See Figure 40, p. 57 for locations.
Note: Inspect wiring to ensure that all field-installed
wiring complies with NEC and applicable local
codes.
SEHF Units w/200V or 230V Electric Heat:
(requires separate power supply to heater)
Lock and tag out unit main electric power and remove
power supply wiring for the electric heat from a dedicated,
field- supplied/installed disconnect to terminal block 4TB2,
or to an optional unit mounted disconnect switch 4S15.
See Figure 40, p. 57 for locations.
Field Installed Control Wiring
Note: Inspect wiring to ensure that all field-installed
wiring complies with NEC and applicable local
codes.
Remove the field wiring connections for the variable air
volume controls as applicable.
Note: Label wiring to save time when reconnecting
wiring is necessary.
Remove ground wire from the unit.
Note: The electrical connection for 40, 60, 70 and 75 ton
is 32 inches further down the unit than older style
units. On full perimeter curbs, this also means the
incoming electrical will be outside the curb area.
The electrician should be informed of both points.
See Figure 40, p. 57 for typical field wiring for 20-75Ton
units.
See Figure 41, p. 58 for typical field power wiring for 90-
130Ton units.
WARNING
R-410A Refrigerant under Higher
Pressure than R-22!
The unit described in this manual uses R-410A
refrigerant which operates at higher pressures than R-
22 refrigerant. Use ONLY R-410A rated service
equipment or components with this unit. For specific
handling concerns with R-410A, please contact your
local Trane representative.
Failure to use R-410A rated service equipment or
components could result in equipment or components
exploding under R-410A high pressures which could
result in death, serious injury, or equipment damage.
WARNING
Fiberglass Wool
Product contains fiberglass wool. Disturbing the
insulation in this product during installation,
maintenance or repair will expose you to airborne
particles of glass wool fibers and ceramic fibers known
to the state of California to cause cancer through
inhalation. Glass wool fibers may also cause
respiratory, skin or eye irritation.
WARNING
Live Electrical Components!
During installation, testing, servicing and
troubleshooting of this product, it may be necessary to
work with live electrical components. Have a qualified
licensed electrician or other individual who has been
properly trained in handling live electrical components
perform these tasks. Failure to follow all electrical
safety precautions when exposed to live electrical
components could result in death or serious injury.
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