Carrier 17/19EX - Manual (Page 90)

Auto. Restart After Power Failure
This option may be enabled or disabled, and may be viewed/modified in the Config table of
Equipment Configuration. If enabled, the chiller will start up automatically after a single cycle
drop-out, low, high, or loss of voltage has occurred, and the power is within ±10% of normal.
The 15-min start-to-start timer and the stop-to-start timer are ignored during this type of start-up.
When power is restored after the power failure, and if the compressor had been running, the
oil pump will be energized for one minute prior to the evaporator pump energizing. Auto restart
will then continue like a normal start-up.
IMPORTANT: Afield-supplied water temperature control system for condenser
water should be installed. The system should maintain the leaving condenser water
temperature at a temperature that is 20° F (11° C) above the leaving chilled water
temperature.
CAUTION CAUTION
!
The tower-fan relay control is not a substitute for a condenser water temperature
control. When used with a Water Temperature Control system, the tower fan
relay control can be used to help prevent low condenser water temperatures and
associated problems.