Generac Power Systems 4270-0 - Manual (Page 35)

Section 2 - Installation
QUiETPACT™ 75D Recreational Vehicle Generator
INSTALLATION
Figure 2.18 - Installation With Isolation Receptacle
DOCKSIDE
POWER
RECEPTACLE
2.7 BATTERY INSTALLATION
♦ 2.7.1 RECOMMENDED BATTERY
Install a battery that meets the following
requirements:
• The battery must be a 12-volt, automotive type
storage battery.
• Use a battery rated 70 amp-hours and capable of
delivering 360 cold-cranking amps.
NOTE:
If the battery is to be used to power other vehicle
accessories, as well as start the generator, you may
need a battery with a larger capacity.
♦ 2.7.2 BATTERY CABLES _____________________ __
Using battery cables that are too long or too small in
diameter may cause a drop in voltage, which causes
starting problems. For the best cold weather starting,
the voltage drop between battery terminals and the gen­
erator connection point should not exceed 0.12 volts
per 100 amps of cranking current.
QUIETPACT™ generators are rated at about 100 DC
amps of cranking current.
Select battery cables based on (a) cable length and (b)
prevailing ambient temperatures. Generally, the longer
the cable and the colder the weather, the larger the
cable size must be, as shown in the chart.
CABLE LENGTH
in Feet (meters] CABLE SIZE
0 to 10 (0 to 3) 2*
11 to 15 (3.4 to 4.5) 0
16 to 20 (4.5 to 6) 000
♦ 2.7.3 BATTERY CABLE CONNEQIONS_____________
1. Connect the battery cable from the battery post or
terminal indicated by a POSITIVE, POS or (-t) to
the insulated lug on the unit frame (Figure 2.19).
NOTE:
Check to be sure the cable boot for the positive
cable has been installed.
2
.
3
.
4.
Connect the battery cable from the battery post
indicated by a NEGATIVE, NEG or (-) to the vehi­
cle frame ground connection (Figure 2.19).
Connect a cable from the vehicle frame ground to
the negative post on the generator frame.
Connect cables so the connectors are clean
and tight.
Figure 2.19 - Connecting Battery Cables
*For warm weather, use No. 2 cable up to 20 feet.
Generac* Power Systems, Inc. 33