Quick Charge QPXU - Manual (Page 3)

NOTE: It does not matter what position the meter switch is in. It is
for viewing and not operating.
EQUALIZATION:
When using multiple batteries in a series string, cells become
uneven during charge and discharge cycles. At least once a month
perform two charge cycles back to back, this will give a chance for
cells that are lagging behind to catch up, and is important to overall
battery performance. NOTE: This only needs to be done when
using the wet cell or AGM settings with a standard, or extended
gassing/absorption cycle. (Switch #1 ON).
SAFETY INFORMATION AC WIRING:
Before making AC connections, refer to the requirements on the
charger ID label. If your charger is not equipped with an AC plug,
for example, a 230 volt charger, have a qualified electrician install
one.
To reduce the risk of fire, use this charger only on branch circuits
that are protected by a circuit breaker or fuse, and that are adequate
to carry the power drawn by the charger. All wiring should be in
accordance with the National Electric Code, ANSI/NFPA 70, and
all local codes and ordinances.
This battery charger must be grounded to reduce the risk of electric
shock. 117 volt chargers are equipped with a grounding type plug,
230 volt chargers are shipped without a plug. Have a qualified
electrician install a properly grounded 3 wire plug.