RTAA-SVX01A-EN 107
Pre-Start Checkout
CAUTION
Compressor Damage!
Do not interchange any load leads that are from the unit
contactors or the motor terminals.
7. Reopen the unit disconnect and disconnect the phase indicator.
Water System Flow Rates
Establish a balanced chilled water flow through the evaporator. The flow rates
should fall between the minimum and maximum values given in
Table 1. Chilled water flow rates below the minimum values will result in
laminar flow, which reduces heat transfer and causes either loss of EXV
control or repeated nuisance diagnostics. Flow rates that are too high can
cause tube erosion and damage to the tube supports and baffles in the evapo-
rator.
CAUTION
Evaporator Freezing Damage!
Once the evaporator is filled with water, the evaporator heat tape
must be energized to protect the evaporator from freezing and
bursting if the outdoor air temperature drops below freezing.
Water System Pressure Drop
Measure chilled water pressure drop through the evaporator at the field-
installed pressure taps on the system water piping. See Figure 15. Use the
same gauge for each measurement. Do not include valves, strainers fittings in
the pressure drop readings.
Pressure drop readings should be approximately those shown in the Pressure
Drop Charts, Figure 16.
Clear Language Display Set-up
Refer to “Clear Language Display Keypad Overview” for instruction on
adjustment of the settings.
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