Schumacher Proseries PSC-15A-OB - Manual (Page 9)

5
DC CONNECTION PRECAUTIONS 5.
Connect and disconnect the DC output ring terminals only after removing the 5.1
AC plug from electric outlet.
Attach the ring terminals to the battery and chassis, as indicated in steps 6.5,
5.2
6.6, and 7.2 through 7.4.
FOLLOW THESE STEPS WHEN BATTERY IS INSTALLED IN 6.
VEHICLE.
A spark near the battery may cause a
battery explosion. To reduce the risk
of a spark near the battery:
Position the AC and DC cords to reduce the risk of damage by the hood, door, 6.1
and moving or hot engine parts.
Stay clear of fan blades, belts, pulleys, and other parts that can cause injury.
6.2
Check the polarity of the battery posts. The POSITIVE (POS, P, +) battery 6.3
post usually has a larger diameter than the NEGATIVE (NEG, N,–) post.
Determine which post of the battery is grounded (connected) to the chassis. If
6.4
the negative post is grounded to the chassis (as in most vehicles), see step
(6.5). If the positive post is grounded to the chassis, see step (6.6).
For a negative-grounded vehicle: You should disconnect both battery cables
6.5
from the battery before connecting the charger cables. The output leads of
the charger are terminated with 3/8” dia. ring terminals. Remove the bolt from
the battery post connector, insert the bolt through the ring terminal then place
the bolt back in the battery connector and tighten. Connect the POSITIVE
(RED) ring terminal from the battery charger to the POSITIVE (POS, P,
+) ungrounded post of the battery. Connect the NEGATIVE (BLACK) ring
terminal to the vehicle chassis or engine block away from the battery. Do not
connect the ring terminal to the carburetor, fuel lines, or sheet-metal body
parts. Connect to a heavy gauge metal part of the frame or engine block.
For a positive-grounded vehicle : You should disconnect both battery cables
6.6
from the battery before connecting the charger cables. The output leads of
the charger are terminated with 3/8” dia. ring terminals. Remove the bolt from
the battery post connector, insert the bolt through the ring terminal then place
the bolt back in the battery connector and tighten. Connect the NEGATIVE
(BLACK) ring terminals from the battery charger to the NEGATIVE (NEG,
N, –) ungrounded post of the battery. Connect the POSITIVE (RED) ring
terminals to the vehicle chassis or engine block away from the battery. Do not
connect the ring terminals to the carburetor, fuel lines, or sheet-metal body
parts. Connect to a heavy gauge metal part of the frame or engine block.