CHECKING FOR TWIST IN LOAD CHAIN Models R, RR
The best way to check for this condition is to run the lower
hook, without a load, up to within about 2 feet (.61 Meters) of
hoist. If the dead end of the chain has been properly installed,
a twist can occur only if the lower hook block has been cap-
sized between the strands of chain. Reverse capsize to
remove twist.
CHECKING FOR ADEQUATE VOLTAGE AT HOIST
The hoist must be supplied with adequate electrical power
in order to operate properly. For proper operation, the voltage, (mea-
sured at the hoist end of the standard power cord with the
hoist operating in the
ជ
, up direction with full load) must
be as indicated in the table below.
SIGNS OF INADEQUATE ELECTRICAL POWER
(LOW VOLTAGE) ARE:
•
Noisy hoist operations due to brake and/or contactor
chattering.
•
Dimming of lights or slowing of motors connected to
the same circuit.
•
Heating of the hoist motor and other internal components
as well as heating of the wires and connectors in the
circuit feeding the hoists.
•
Failure of the hoist to lift the load due to motor stalling.
•
Blowing of fuses or tripping of circuit breakers.
To avoid these low voltage problems, the hoist must be
connected to an electrical power supply system that complies
with the National Electrical Code and applicable local
codes. This system must also provide (slow blow fuses or
inverse-time type circuit breakers) and provisions for
grounding the hoist.
Low voltage may also be caused by using an undersized
cord and/or connectors to supply power to the hoist.
The following chart should be used to determine the size
wires in the extension cord in order to minimize the voltage
drop between the power source and the hoist.
Remember, operation with low voltage can void the CM
repair/replacement policy. When in doubt about any of the
electrical requirements, consult a qualified electrician.
WARNING
Allowing the hook block to run into the bottom of the hoist
when raising a load or allowing the chain to become taut
between the loose end screw and the frame when lowering
a load may break the chain and allow the load to drop.
TO AVOID INJURY:
Do not allow the hook block to contact the bottom of the
hoist or the loose end chain to become taut.
NOMINAL
VOLTAGE
MINIMUM
RUNNING
VOLTAGE
MINIMUM
STARTING
VOLTAGE
115-1-60
104
98
230-1-60
207
196
230-3-60
187
-
460-3-60
396
-
220-3-50
198
-
380-3-50
365
-
415-3-50
399
-
6
WARNING
Failure to properly ground the hoist presents the danger of
electric shock.
TO AVOID INJURY:
Permanently ground the hoist as instructed in this manual.
LENGTH
OF
EXTENSION
CORD
THREE
PHASE
HOISTS
SINGLE
PHASE
HOIST
MINIMUM
WIRE SIZE
MINIMUM
WIRE SIZE
UP TO
50 FEET
(15.2 m)
#16 AWG
(1.5 mm
2
)
#14 AWG
(2.5 mm
2
)
80 FEET
(24.4 m)
#16 AWG
(1.5 mm
2
)
#12 AWG
(4 mm
2
)
120 FEET
(36.7 m)
#14 AWG
(2.5 mm
2
)
#10 AWG
(6 mm
2
)
200 FEET
(61.0 m)
#14 AWG
(2.5 mm
2
)
Contact
Factory
For runs beyond 200 Ft (61 m) contact factory.
WARNING
Failure to provide a proper power supply system for the
hoist may cause hoist damage and offers the potential for a
fire.
TO AVOID INJURY:
Provide each hoist with a 20 amp, minimum, overcurrent
protected power supply system per the National Electrical
Code and applicable local codes as instructed in this manual.
WARNING
TO AVOID INJURY:
Always disconnect the power cord from the power supply
system and lockout/tagout disconnecting means before
servicing the hoist. Working in or near exposed energized
electrical equipment presents the the danger of electric shock.
!
!
!
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