Generac 04675-3 User Manual

1.10 BATTERY INSTALLATION

Fill the battery with the proper electrolyte fluid if

necessary and have the battery fully charged before

installing it.
Before installing and connecting the battery, complete

the following steps:
1. Set the generator's AUTO/OFF/MANUAL switch to

OFF.

2. Turn off utility power supply to the transfer

switch.

3. Remove the 5 amp fuse from the generator con-

trol panel.

If the AUTO/OFF/MANUAL switch is not set to its

OFF position, the generator can crank and start

as soon as the battery cables are connected. If

the utility power supply is not turned off, spark-

ing can occur at the battery posts and cause an

explosion.

Battery cables were factory connected at the genera-

tor (Figure 1.5). Connect cables to battery posts as

follows:
4. Connect the red battery cable (from starter con-

tactor) to the battery post indicated by a positive,

POS or (+).

5. Connect the black battery cable (from frame

ground) to the battery post indicated by a nega-

tive, NEG or (—).

6. Replace the 5 amp fuse in the generator control

panel.

NOTE:

Damage will result if battery connections are made

in reverse.

Figure 1.5 – Battery Cable Connections

NOTE:

The generator is equipped with a battery trickle

charger that is active when the unit is set up for

automatic operation. With the battery installed

and utility power source voltage available to the

transfer switch, the battery receives a trickle

charge while the engine is not running, to prevent

self-discharge. The trickle charger is designed to

help extend the life of the battery by maintain-

ing the battery when the unit is not running. The

trickle charge feature cannot be used to recharge

a discharged battery.

1.11 THE BATTERY

Servicing of the battery is to be performed or super-

vised by personnel knowledgeable of batteries and

the required precautions. Keep unauthorized person-

nel away from batteries.
When replacing the battery, use the following type of

battery: Group 26/26R 12-volt battery with a rating

of 350 cold-cranking amps minimum for 7 kW; 525

cold-cranking amps minimum for 12 and 15 kW at

-18º C (0º F) minimum. When using a maintenance-

free battery, it is not necessary to check the specific

gravity or electrolyte level. Have these procedures

performed at the intervals specified in the “Service

Schedule.” A negative ground system is used. Battery

connections are shown on the wiring diagrams. Make

sure the battery is correctly connected and terminals

are tight. Observe battery polarity when connecting

the battery to the generator set.

DANGER

Do not dispose of the battery in a fire. The

battery is capable of exploding.

A battery presents a risk of electrical shock

and high short circuit current. The following pre-

cautions are to be observed when working on

batteries:

• Remove watches, rings or other metal objects;

• Use tools with insulated handles;

• Wear rubber gloves and boots;

• Do not lay tools or metal parts on top of the

battery; and

• Disconnect charging source prior to connecting or

disconnecting battery terminals.

Do not open or mutilate the battery. Released

electrolyte has been known to be harmful to the

skin and eyes, and to be toxic.

The electrolyte is a dilute sulfuric acid that is

harmful to the skin and eyes. It is electrically

conductive and corrosive.

Section 1 — General Information

Air-cooled 7 kW, 12 kW and 15 kW Generators