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 be rated for a minimum of 20 amps
and it must have #14 AWG or larger wiring, a disconnecting
means, overcurrent protection (slow blow fuses or inverse-time
type circuit breakers) and provisions for grounding the hoist.
Low voltage can also be caused by using an undersize
extension cord 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.
LENGTH OF
SINGLE-PHASE
THREE-PHASE
EXTENSION
HOISTS
HOISTS
CORD
MIN. WIRE SIZE
MIN. WIRE SIZE
Up to 50 feet
#14 AWG
#16 AWG
80 feet
#12 AWG
#16 AWG
120 feet
#10 AWG
#14 AWG
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.
Note: Always disconnect the power from the power
supply system and lockout/tagout disconnecting
means before servicing the hoist.
Checking for Twist in Load Chain
Models WE, WH and WR
The best way to check for this condition is to run the lower
hook, without a load, up to within about 2” 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 capsized
between the strands of chain. Reverse capsize to remove
twist.
L
L
!!
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.
L
L
!!
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 the hoist with a 20 amp. minimum, overcurrent pro-
tected power supply system per the National Electrical Code
and applicable local codes as instructed in this manual.
OPERATING INSTRUCTIONS
GENERAL
The hoist is equipped with a Protector™ that is designed to
allow the intermediate gear to slip on an excessive overload.
An overload is indicated when the hoist will not raise the
load. Also, some clutching noise may be heard if the hoist is
loaded beyond rated capacity. Should this occur, immediate-
ly release the up
control to stop the operation of the hoist.
At this point, the load should be reduced to the rated hoist
capacity or the hoist should be replaced with one of the
proper capacity. When the excessive load is removed, nor-
mal hoist operation is automatically restored.
CAUTION: The Protector™ is susceptible to over-
heating and wear when slipped for extended peri-
ods. Under no circumstance should the clutch be
allowed to slip for more than a few seconds.
Due to the above, the hoist is not recommended for use in
any application where there is a possibility of adding to an
already suspended load to the point of overload. This
includes dumbwaiter installation (refer to limitations dis-
cussed in Safety Precautions on Page ii), containers that are
loaded in mid-air, etc. Also, if the hoist is used at unusual
extremes of ambient temperatures, above 150°F. or below
15°F., changes in lubricant properties may permit the hoist to
raise larger loads than under normal operating conditions
and present possibility of damage or injury.
O
On
n s
siin
ng
glle
e p
ph
ha
as
se
e u
un
niitts
s,, iitt iis
s n
ne
ec
ce
es
ss
sa
arry
y tto
o s
stto
op
p tth
he
e h
ho
oiis
stt b
be
effo
orre
e
c
ch
ha
an
ng
giin
ng
g d
diirre
ec
cttiio
on
n.. T
Th
he
erre
effo
orre
e,, w
wh
he
en
n llo
ow
we
erriin
ng
g a
a llo
oa
ad
d,, tth
he
e
rro
oc
ck
ke
err iin
n tth
he
e c
co
on
nttrro
oll s
stta
attiio
on
n m
mu
us
stt b
be
e rre
elle
ea
as
se
ed
d m
mo
om
me
en
ntta
arriilly
y
b
be
effo
orre
e tth
he
e u
up
p
c
co
on
nttrro
oll iis
s d
de
ep
prre
es
ss
se
ed
d tto
o rra
aiis
se
e tth
he
e llo
oa
ad
d.. IIff tth
hiis
s
iis
s n
no
ott d
do
on
ne
e,, tth
he
e h
ho
oiis
stt w
wiillll c
co
on
nttiin
nu
ue
e tto
o o
op
pe
erra
atte
e iin
n tth
he
e d
do
ow
wn
n
d
diirre
ec
cttiio
on
n w
wh
hiille
e tth
he
e u
up
p
c
co
on
nttrro
oll iis
s d
de
ep
prre
es
ss
se
ed
d,, a
an
nd
d iitt w
wiillll c
co
on
n--
ttiin
nu
ue
e tto
o llo
ow
we
err tth
he
e llo
oa
ad
d u
un
nttiill tth
he
e c
co
on
nttrro
oll rro
oc
ck
ke
err iis
s rre
elle
ea
as
se
ed
d.. A
As
s
a
a rre
es
su
ulltt,, o
on
n tth
he
e s
siin
ng
glle
e p
ph
ha
as
se
e u
un
niitts
s,, tth
he
e d
diirre
ec
cttiio
on
n m
mu
us
stt n
no
ott b
be
e
rre
ev
ve
errs
se
ed
d q
qu
uiic
ck
klly
y ((p
pllu
ug
g rre
ev
ve
errs
se
ed
d))..
There are no electrical switches to stop the operation of the
hoist at the upper and lower limits of the lift. As a result, it is
necessary to release the rocker in the control station to stop
the hoist before the hook block or loose end block contacts
the bottom of the hoist frame. If the hook block or loose end
block contacts the hoist frame, the Protector™ will function to
stop the hoisting or lowering operation and protect the hoist
components from damage. However, continued, prolonged
or repeated slipping of the Protector™ will damage the
Protector™ and cause overheating of the internal hoist com-
ponents.
HOIST
1. Before picking up a load, check to see that the hoist is
directly overhead.
2.
WHEN APPLYING A LOAD, IT SHOULD BE DIRECTLY
UNDER HOIST OR TROLLEY. AVOID OFF CENTER
LOADING OF ANY KIND.
3. Take up a slack load chain carefully and start load easily
to avoid shock and jerking of hoist load chain. If there is
any evidence of overloading, immediately lower the load
and remove the excess load.
4.
DO NOT
allow the load to swing or twist while hoisting.
5.
DO NOT
allow the load to bear against the hook latch.
±
±
±
8
W
WA
AR
RN
NIIN
NG
G
Working in or near exposed energized electrical equipment
presents the danger of electrical shock.
T
TO
O A
AV
VO
OIID
D IIN
NJ
JU
UR
RY
Y
Disconnect power and lockout/tagout disconnecting means
before removing cover or servicing this equipment.
For more information contact: Sievert Crane and Hoist, (708) 771-1600, [email protected], www.sievertcrane.com
