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Pre-Start
Procedures
Note: With the water pump operating, throttle the water flow to approxi-
mately 50 percent of the full flow rate. Following the manufacturer's instruc-
tions, adjust the flow switch contacts to open at this point. Use an ohmmeter
to verify opening and closure of the switch contacts.
[ ] Stop the chilled water pump.
[ ] Open all circuit breakers.
Unit Voltage and Amperage Checks
WARNING
Live Electrical Components!
During installation, testing, servicing and troubleshooting of this
product, it may be necessary to work with live electrical components.
Have a qualified licensed electrician or other individual who has been
properly trained in handling live electrical components perform these
tasks. Failure to follow all electrical safety precautions when exposed
to live electrical components could result in death or serious injury.
Electrical power to the unit must meet stringent requirements for the unit to
operate properly. Total voltage supply and voltage imbalance between
phases should be within the following tolerances.
Voltage Supply — 3-Phase Units Only
Measure each leg of supply voltage at all line voltage on circuit breaker.
Readings must fall within the voltage utilization range shown on the unit
nameplate. If voltage on any leg does not fall within tolerance, notify the
power company to correct this situation before operating the unit. Inade-
quate voltage to the unit will cause control components to malfunction and
shorten the life of electrical components and compressor motors.
CSRA-SVX01A-EN
31
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