Trane RTAA-70 Installation & Maintenance Manual page 104

104
Pre-Start Checkout
the unit does not have the optional control power transformer, 115 VAC
power must be field supplied to terminals 1TB3-1 AND 1TB3-2. Press the
Stop key on the Clear Language Display.
CAUTION
Compressor Damage!
The compressor sump heaters must be energized for a minimum
of 24 hours prior to unit operation, to prevent compressor
damage caused by liquid refrigerant in the compressor at
start-up.
• Energize the evaporator heat tape.
• Fill the evaporator chilled water circuit. Refer to Table 1 for evaporator
liquid capacities. Vent the system while it is being filled. Open the vent on
the top of the evaporator during filling and close when filling is
completed.
CAUTION
Proper Water Treatment!
The use of untreated or improperly treated water in a RTAA may
result in scaling, erosion, corrosion, algae or slime. It is
recommended that the services of a qualified water treatment
specialist be engaged to determine what water treatment, if any,
is required. Trane assumes no responsibility for equipment
failures which result from untreated or improperly treated water,
or saline or brackish water.
CAUTION
Equipment Damage!
Do not fill the water system unless the evaporator heat tapes
have been energized.
• Close the fused-disconnect switch(es) that supplies power to the chilled
water pump starter.
• Start the chilled water pump to begin circulation of the chilled water.
Inspect all piping for leakage and make any necessary repairs.
• With chilled water circulating through the system, adjust water flow and
check water pressure drop through the evaporator. Refer to
• Adjust the chilled water flow switch (if installed) for proper operation.
• Prove Chilled Water Flow Interlock and External Auto/Stop as described in
Interlock Wiring.
• Check and set, as required, all Clear Language Display Menu Items.
• Stop the chilled water pump.
Figure 16.
RTAA-SVX01A-EN