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Parts Breakdown
REF PART # DESCRIPTION REF PART # DESCRIPTION
1 PT20550001 SWITCH BOX 5 PT20551005 RELAY RA-30 22-34A
2 PT20550002 SWITCH BOX COVER ASSEMBLY 6 PT20550006 CONTACTOR RETAINER
2-1 PT20551002-1 DATA LABEL 7 PS38M PHLP HD SCR M4-.7 X 10
2-2 PT20550002-2 PLASTIC COVER SCREW 8 PHTEK18 TAP SCREW #10 X 5/8
3 PT20551003 CONTACTOR MA-30 220V 10 P4571010 LIQUID-TITE STRAIN RELIEF
4 PT20550004 FIELD SWITCH 11 P4571011 RUBBER SEAL
5
2
4
6
7
1
3
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COPYRIGHT © JANUARY, 2008 BY GRIZZLY INDUSTRIAL, INC. WARNING: NO PORTION OF THIS MANUAL MAY BE
REPRODUCED IN ANY SHAPE OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.
#CR10390 PRINTED IN TAIWAN
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8
Thermal Relay Overload
Amp Adjustment Dial:
Turn this dial to meet your
motor manufacturer's
thermal overload amp setting
specification. Typically this
setting is 100-110% of what
is listed on the motor data
plate as the max amp load.
Remember, turning this dial has
no effect on increasing motor
horsepower. If this dial is turned
to an amp setting that is too
high, the motor can overheat
and be damaged before the
relay trips.
Manual Trip Test Lever:
If the thermal relay function is
in question, use a wooden stick
or dowel to slide the brown
lever to the right. If the motor
shuts off, the thermal relay has
tripped and is functional. If the
motor keeps running, the thermal relay contacts are shorted closed and
the relay must be replaced.
ON Button:
When pushed, power is sent
to the magnetic field coil and
the contactor closes and sends
power to the motor.
Reset Button/OFF Button:
Reset operation: If the
thermal relay has tripped,
push this button to reset the
thermal relay.
OFF operation: If the motor
is operating normally, this
button will also cut the
current going to the
magnetic field coil, which
opens the contactor and kills
power to the motor.
Manual Contactor Override Lug:
When pushed, the contactor is
manually closed for troubleshooting
purposes only.
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