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Startup the Unit
Use the following in conjunction with the
Checklist," p.
62, to ensure that the unit is properly installed
and ready for operation. Be sure to complete all of the
procedures described in this section before starting the unit
for the first time.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Verify that no power is
present with a voltmeter.
☐ Turn the optional field supplied disconnect switch,
located upstream of the rooftop unit, to the "Off"
position.
☐ Turn the 115 volt control circuit fused disconnect switch
1S1 to the "Off" position. It is located at the top of the
Main Control Box, behind the center door.
☐ Check all electrical connections for tightness and "point
of termination" accuracy.
☐ Verify that the condenser airflow will be unobstructed.
☐ Check the compressor crankcase oil level. Oil should
be visible in the compressor oil sight glass. The oil level
should be 1/2 to 3/4 high in the sight glass with the
compressor "Off".
☐ Verify that service valves are open/back seated on
each circuit.
NOTICE
Compressor Damage!
Excessive liquid accumulation in the suction lines
could result in compressor damage.
Do not allow liquid refrigerant to enter the suction
line.
Do not start the unit in the cooling mode if the ambient
temperature is below the following minimum recommended
operating temperature:
Note: See
, p. 104
for minimum outside air temperature.
☐ Inspect the interior of the unit for tools and debris.
Install all panels in preparation for starting the unit.
56
"Trane Startup
Electrical Phasing
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Verify that no power is
present with a voltmeter.
Important: HIGH VOLTAGE IS PRESENT AT TERMINAL
BLOCK OR UNIT DISCONNECT SWITCH.
All units have a phase monitor installed inside the main
control box, behind the center door, in the top row of
components. If the phase monitor shows a green LED
indicator, all phases are normal. Unit should operate
normally. If the phase monitor shows a red LED indicator,
there is a phase error. This error could be a loss of phase,
phase imbalance, or reversed phasing with customer
supplied power wiring. Check for a loss of phase, a phase
voltage imbalance of more than 10%, or disconnect all
power and reverse any two customer power leads.
Verifying Proper Fan Operation
WARNING
Hazardous Service Procedures!
Failure to follow all precautions in this manual and on
the tags, stickers, and labels could result in death or
serious injury.
Technicians, in order to protect themselves from
potential electrical, mechanical, and chemical
hazards, MUST follow precautions in this manual and
on the tags, stickers, and labels, as well as the
following instructions: 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.
1. Close the disconnect switch or circuit protector switch
that provides the supply power to the unit terminal block
2XD1 or the optional unit mounted disconnect switch
2QB1.
2. Turn the 115 volt control fused disconnect circuit switch
to the On position.
RT-SVX063G-EN
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