Trane RTWD Installation Operation & Maintenance page 82

Pre-Start Checkout
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Failure to disconnect power
before servicing could result in death or serious injury.
RTWD HSE version
• Time before to work on the electrical panel of the unit:
once the AFD is off (confi rmed by the extinction of the
display), it is mandatory to wait one minute before
working on the electrical panel.
• However, for any intervention in the AFD, the
indicated time on the label of the AFD must be
respected.
Water System Flow Rates
Establish a balanced chilled water fl ow through the
evaporator. The fl ow rates should fall between the
minimum and maximum values. Chilled water fl ow
rates below the minimum values will result in laminar
fl ow, which reduces heat transfer and causes either loss
of EXV control or repeated nuisance, low temperature
cutouts. Flow rates that are too high can cause tube
erosion.
The fl ow rates through the condenser must also be
balanced. The fl ow rates should fall between the
minimum and maximum values.
Water System Pressure Drop
Measure water pressure drop through the evaporator
and condenser at the fi eld-installed pressure taps on
the system water piping. Use the same gauge for each
measurement. Do not include valves, strainers fi ttings in
the pressure drop readings.
Pressure drop readings should be approximately those
shown in the Pressure Drop Charts starting with Figure 4.
CAUTION
Equipment Damage!
Ensure that the oil separator and compressor heaters have
been operating for a minimum of 24 hours before starting.
Failure to do so may result in equipment damage.
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RLC-SVX14H-GB