3 Check the power supply voltage to
the unit at the main power fused-
disconnect 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.
CAUTION! Improper power phasing
can result in equipment damage due
to reverse rotation.
CAUTION! Do not use untreated or
improperly treated water.
Equipment damage may occur.
5 Fill the evaporator chilled water
circuit. Vent the system while it is
being filled. Open the vents on the
top of the evaporator shell while
filling and close when filling is
completed.
Important: The use of improperly
treated or untreated water in this
equipment may result in scaling,
erosion, corrosion, algae or slime.
The services of a qualified water
treatment specialist should be
engaged to determine what
treatment, if any, is advisable. Trane
warranty specifically excludes
liability of corrosion, erosion or
deterioration of Trane equipment.
Trane assumes no responsibilities
for the results of the use of
untreated or improperly treated
water or saline or brackish water.
6 Close the fused-disconnect
switch(es) that supplies power to
the chilled water pump starter.
7 Start the chilled water pump to
begin circulation of the water.
Inspect all piping for leakage and
make any necessary repairs.
8 With water circulating through the
system, adjust water flow and
check water pressure drop through
the evaporator.
9 Adjust the chilled water flow
switch for proper operation.
WARNING! Use extreme caution
when performing the following
procedure with power applied.
Failure to do so can result in
personal injury or death.
10 Reapply power to complete
procedures.
11 Prove all Interlock and
Interconnecting Wiring Interlock
and External as described in the
Electrical Installation section.
12 Check and set, as required, all
UCM-CLD menu items.
Note: On Total Heat Recovery and
Free-Cooling units, also check and
set the A70 module.
13 Stop the chilled water pump.
14 Energize compressor and oil
separators 24 hours prior to unit
start-up.
❏
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 applicable.
❏
If the ice making-option is used,
install leads on terminals TB1-1
and 2 on module A9.
General
When installation is complete, but
prior to putting the unit into service,
the following pre-start procedures
must be reviewed and verified
correct:
WARNING! Disconnect all electric
power including remote disconnects
before servicing. Failure to
disconnect power before servicing
can cause severe personal injury or
death.
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! Verify all connections are
made. Loose connections can cause
overheating and undervoltage
conditions at the compressor motor.
2 Open all refrigerant valves in the
discharge, liquid, oil and oil return
lines.
CAUTION! Do not operate the unit
with the compressor, oil discharge,
liquid line service valves and the
manual shutoff on the refrigerant
supply to the coolers "CLOSED".
Failure to have these "OPEN" may
cause serious compressor damage.
68
RTAD-SVX01F-E4
Pre-Start Checkout
