CM-ET Lodestar - Manual (Page 10)

Do not force the Lodestar Protector to compensate for
improperly adjusted limit switches or reverse voltage phasing.
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,
(measured at the hoist end of the standard power cord with
the hoist operating in the
, 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 compo-
nents 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 con-
nected 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 fol-
lowing 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.
W WA AR RN NIIN NG G
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.
T TO O A AV VO OIID D IIN NJ JU UR RY Y::
Do not allow the hook block to contact the bottom of the
hoist or the loose end chain to become taut.
V
!!
NOMINAL
CURRENT
MINIMUM
RUNNING
VOLTAGE
MINIMUM
STARTING
VOLTAGE
230-3-60 187 -
460-3-60 396 -
220-3-50 198 -
380-3-50 365 -
415-3-50 399 -
6
W WA AR RN NIIN NG G
Failure to properly ground the hoist presents the danger of
electric shock.
T TO O A AV VO OIID D IIN NJ JU UR RY Y::
Permanently ground the hoist as instructed in this manual.
V
!!
LENGTH
OF
EXTENSION
CORD
THREE
PHASE
HOISTS
MINIMUM
WIRE SIZE
UP TO 50 FEET #16 AWG
(1.6 mm)
80 FEET
(24.4 M)
#16 AWG
(1.6 mm)
120 FEET
(36.7 M)
#14 AWG
(2.0 mm)
200 FEET
(61.0 M)
#14 AWG
(2.0 mm)
300 FEET
(91.4 M)
#12 AWG
(2.7 mm)
For runs beyond 300 Feet contact factory.
W WA AR RN NIIN NG G
Failure to provide a proper power supply system for the
hoist may cause hoist damage and offers the potential for
a fire.
T TO O A AV VO OIID D IIN NJ JU UR RY Y::
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.
V
!!
W WA AR RN NIIN NG G
T TO O A AV VO OIID D IIN NJ JU UR RY Y::
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.