Wood’s Powr-Grip EO1DCB - Manual (Page 7)

Rev 10.0/9-13 5 EO1DCB: #35191AFT
T
O
U
SE THE
B
ACK
-U
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S
YSTEM
The DC Vacuum Back-Up System requires minimal interaction from the operator. Before
operating the vacuum lifter, make sure the Back-Up System is activated: If the Back-Up System
has a local power switch (see OPERATING FEATURES), place it in the “ON” position. If the Back-
Up System is wired to the lifter’s main power switch, the Back-Up System is automatically
activated whenever that switch is in the “ON” position. Use the lifter as directed in its operating
instructions. If the primary vacuum system fails to maintain the minimum vacuum level specified
for the lifter's load capacity (see lifter specifications), the Back-Up System functions automatically
to maintain adequate vacuum.
Note: When the Back-Up System is initially activated, its vacuum pump engages briefly to
evacuate the vacuum reservoir. This is normal for a Back-Up System that is functioning correctly
and does not indicate a failure of the primary power source. In addition, if the lifter's vacuum
reservoir is not isolated, the Back-Up System’s pump engages each time the lifter is applied to a
load. Although this cycling does not adversely affect the Back-Up System or its operation, it does
require the battery to be charged more frequently.
WARNING: Never turn off Back-Up System while lifting load--ESPECIALLY if
lifter's primary power source is not functioning.
Whenever the primary power source is not functioning for an extended period, the Back-Up
System’s pump re-engages automatically to prevent the vacuum from decreasing to a level that
is lower than the specified minimum. If the pump cycles frequently during this time, test both
the Back-Up System and the primary vacuum system as directed (see MAINTENANCE: B
ACK
-U
P
F
UNCTION
T
EST
and the lifter's instruction manual, respectively) and correct any deficiency before
resuming normal operation of the lifter.
W
HEN THE
B
ACK
-U
P
S
YSTEM IS
N
OT IN
U
SE
If the DC Vacuum Back-Up System has a local power switch, place it in the “OFF” position. If the
Back-Up System is wired to the lifter’s main power switch, the Back-Up System automatically
turns off whenever that switch is in the “OFF” position.
Charge the battery completely when placing it in storage and at six-month intervals thereafter
(see MAINTENANCE: B
ATTERY
R
ECHARGE
). Preferred temperatures for storing the battery are 32°
to 70° Fahrenheit [0° to 21° Celsius]. Higher temperatures require the battery to be charged
more frequently. Storage at temperatures above 100° Fahrenheit [38° Celsius] should be
avoided.