Installation
3–16
4. Install a fuse and fuse holder in the cable that will be used for the
positive side of the DC circuit. The fuse must be as close to the
battery as possible, be rated for DC circuits, and have an Ampere
Interrupting Capacity (AIC) that exceeds the short-circuit current
available from the battery. (See
“Fuse/Circuit Breaker Sizing
Guidelines” on page 3–13
.)
5. Slide the two plastic terminal connector covers (boots) over the ends
of the cables that will be attached to the inverter (red on positive;
black on negative).
6. For each cable, place the cable connector (ring terminal or box lug)
on the appropriate cabling terminal on the inverter’s DC end (red on
positive; black on negative), and then install the lock washer and nut
that are supplied. Tighten the nut to a torque of 9–10 foot pounds (12–
13 Nm). See
Figure 3-4
.
7. Slide the terminal connector covers over the cabling terminals. Slit
the underside of the covers if you have trouble fitting them.
8. Attach the connector on the negative cable to the negative battery
terminal. Make a secure connection. Loose connectors cause
excessive voltage drop and may cause overheated wires and melted
insulation.
9. Before proceeding, make sure that the cable you have just installed
connects the negative terminal of the inverter to the negative terminal
of the battery.
CAUTION: Reverse Polarity
Power connections to the PROwatt 1750 must be positive to
positive and negative to negative.
A reverse polarity connection (positive to negative) will
blow a fuse in the inverter and may permanently damage the
unit. Damage caused by a reverse polarity connection is not
covered by your warranty.
WARNING: Explosion or Fire
Do not complete the next step if flammable fumes are
present. Explosion or fire may result. Thoroughly ventilate
the battery compartment before making this connection.
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