Section 2 - Post Installation Start-Up And Adjustments; Before Initial Startup; Check Transfer Switch Operation; Electrical Checks - Generac Power Systems 04389-3, 04456-3, 04390-3 Installation And Owner's Manual

• Spilled electrolyte is to be washed down with an
acid neutralizing agent. A common practice is to
use a solution of 1 pound (500 grams) bicarbonate
of soda to 1 gallon (4 liters) of water. The bicar-
bonate of soda solution is to be added until the
evidence of reaction (foaming) has ceased. The
resulting liquid is to be flushed with water and the
area dried.

Lead-acid batteries present a risk of fire because
they generate hydrogen gas. The
following procedures are to be followed:
• DO NOT SMOKE when near the battery;
• DO NOT cause flame or spark in battery area; and
• Discharge static electricity from body before touch-
ing the battery by first touching a grounded metal
surface.

Be sure the AUTO/OFF/MANUAL switch is set to
the OFF position before connecting the battery
cables. If the switch is set to AUTO or MANUAL,
the generator can crank and start as soon as the
battery cables are connected.

Be sure the utility power supply is turned off
and the 7.5A and 15A fuses are removed from
the generator control panel, or sparking may
occur at the battery posts as the cables are
attached and cause an explosion.
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 DC, negative ground
battery with a rating of 350 cold-cranking amps mini-
mum for 7 kW; 525 cold-cranking amps minimum
for 12 and 15 kW at -17.8º 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 connect-
ed and terminals are tight. Observe battery polarity
when connecting the battery to the generator set.
2.1 BEFORE INITIAL START-UP
Before starting, complete the following:
1. Set the generator's main circuit breaker to its
OFF (or open) position.
2. Set the generator's AUTO/OFF/MANUAL switch to
the OFF position.
3. Turn OFF the utility power supply to the transfer
switch using the means provided (such as the
utility main line circuit breaker).
4. Turn OFF all loads connected to the transfer
switch terminals T1 and T2.
10
Section 2 — Post Installation Start-up and Adjustments
Air-cooled 7 kW, 12 kW and 15 kW Generators
5. Check the engine crankcase oil level and, if neces-
sary, fill to the dipstick FULL mark with the rec-
ommended oil. Do not fill above the FULL mark.
6. Check the fuel supply. Gaseous fuel lines must
have been properly purged and leak tested in
accordance with applicable fuel-gas codes. All
fuel shutoff valves in the fuel supply lines must
be open.

Never operate the engine with the oil level
below the "Add" mark on the dipstick. Doing
this could damage the engine.
2.2 CHECK TRANSFER SWITCH
OPERATION
Refer to Section 3.5, of the owner's manual for man-
ual operation procedures.
DANGER

Do not attempt manual transfer switch opera-
tion until all power voltage supplies to the
transfer switch have been positively turned off.
Failure to turn off all power voltage supplies
will result in extremely hazardous and possibly
fatal electrical shock.
2.3

ELECTRICAL CHECKS

Complete electrical checks as follows:
1. Set the generator's main circuit breaker to its
OFF (or open) position.
2. Set the generator's Auto/Off/Manual switch to the
OFF position.
3. Turn OFF all loads connected to the transfer
switch terminals T1 and T2.
4. Turn on the utility power supply to the transfer
switch using the means provided (such as a utility
main line circuit breaker).
DANGER

The transfer switch is now electrically "hot."
Contact with "hot" parts will result in extremely
hazardous and possibly fatal electrical shock.
Proceed with caution.
5. Use an accurate AC voltmeter to check utility
power source voltage across transfer switch ter-
minals N1 and N2. Nominal line-to-line voltage
should be 240 volts AC.
6. Check utility power source voltage across termi-
nals N1 and the transfer switch neutral lug; then
across terminal N2 and neutral. Nominal line-to-
neutral voltage should be 120 volts AC.