Trane R Series Installation Operation & Maintenance page 94

RTAC-SVX002A-EN
Pre-Start Checkout
• Connect power supply wiring to the
evaporator heaters.
• Connect power supply wiring to the
chilled water pump.
• Connect power supply wiring to any
auxiliary heat tapes.
• Connect the flow switch and then con-
nect to the proper terminals.
• Connect the chilled water pump to the
proper terminals.
• For the External Auto/Stop function, in-
stall wiring from remote contacts (5K14,
5K15) to the proper terminals on the cir-
cuit board.
• Connect the power supply for the con-
venience outlet, if it is separate from the
evaporator heater.
CAUTION
Information in Interconnecting Wir-
ing!
Chilled Water Pump Interlock and Ex-
ternal Auto/Stop must be adhered to
or equipment damage may occur.
• If alarm and status relay outputs are
used, install leads from the panel to the
proper terminals on circuit board.
• If the emergency stop function is used,
install low voltage leads to terminals on
circuit board.
• Connect separate power for the
External Emergency Stop option, if ap-
plicable.
• If the ice making-option is used, install
leads on 5K18 to the proper terminals
on 1U7.
• Connect separate power supply for ice
making status circuit, if applicable.
General
When installation is complete, but prior
to putting the unit into service, the fol-
lowing
pre-start procedures must be reviewed
and verified correct:
WARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, in-
cluding remote disconnects before
servicing. Follow proper lockout/ta-
gout 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 litera-
ture 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.
Note: For additional information
regarding the safe discharge of
capacitors.
1. Inspect all wiring connections in the
compressor power circuits (disconnects,
terminal block, contactors, compressor
junction box terminals, etc.). to be sure
they are clean and tight.
CAUTION
Connections!
Verify all connections are made.
Loose connections can cause over-
heating and undervoltage conditions
at the compressor motor.
2. Open all refrigerant valves in the
discharge, liquid, suction, oil and oil
return lines.
CAUTION
Compressor Damage!
Catastrophic damage to the com-
pressor will occur if the oil line shut
off valve or the isolation valves are
left closed on unit start-up.
3. Check the power supply voltage to
the unit at the main power fused-dis-
connect switch. Voltage must be within
the voltage utilization range and also
stamped on the unit nameplate. Voltage
imbalance must not exceed 3%.
4. Check the unit power phasing
L1-L2-L3 in the starter to be sure that it
has been installed in an "ABC" phase
sequence.
5. Fill the evaporator chilled water circuit.
Vent the system while it is being filled.
Open the vents on the top of the evapo-
rator waterbox while filling and close
when filling is completed.
CAUTION
Proper Water Treatment!
The use of untreated or improperly
treated water in the unit may result
in scaling, erosion, corrosion, algae
or slime. It is recommended that the
services of a qualified water treat-
ment specialist be engaged to deter-
mine what water treatment, if any, is
required. Trane assumes no respon-
sibility for equipment failures which
94