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Mechanical-Type Starters
1.
Check all field wiring connections for tightness, clearance from moving parts, and correct
connection.
2.
Check the contactor(s) to be sure they move freely. Check the mechanical interlock
between contactors to ensure that 1S and 2M contactors cannot be closed at the same
time. Check all other electro-mechanical devices, e.g., relays, timers, for free movement. If
the devices do not move freely, contact the starter manufacturer for replacement
components.
3.
Some dashpot-type magnetic overload relays must be filled with oil on the job site. If the
starter is equipped with devices of this type, remove the fluid cups from these magnetic
overload relays. Add dashpot oil to cups per instructions supplied with the starter. The oil is
usually shipped in a small container attached to the starter frame near the relays. Use only
dashpot oil supplied with the starter. Do not substitute.
Factory-filled dashpot overload relays need no oil at start-up and solid-state overload relays
do not have oil.
4.
Reapply starter control power (
not main chiller power
) to check electrical functions. When
using a reduced-voltage starter (such as a wye-delta type) check the transition timer for
proper setting. The factory setting is 30 seconds (±5 seconds), timed closing. The timer is
adjustable in a range between 0 and 60 seconds and settings other than the nominal 30