Generac Power Systems RG10090 Owner's Manual page 18

Activation and Startup
Utility voltage must be turned on and present at N1 and
N2 terminals inside generator control panel for this test to
be performed and pass.
Complete the following before starting:
1. Verify generator is OFF. A red LED on control panel
illuminates to verify system is off.
2. Verify generator MLCB (generator disconnect) is
OFF (OPEN).
3. Turn off all circuit breakers/electrical loads to be
supplied by the generator.
4. Verify both auxiliary shutdown switches are ON (I).
5. Check coolant and engine lubricating oil levels.
See Inspecting Coolant Level and Hoses
Checking Lubricating Oil Level and Drain
During initial startup only, generator may exceed normal
number of start attempts and experience an "over crank"
fault. This is due to accumulated air in the fuel system
during installation. Reset control board and restart up to
two more times, if necessary. If unit fails to start, contact
an IASD for assistance.
Checking Manual Transfer Switch
Operation
DANGER
Electrocution. High voltage is present at
transfer switch and terminals. Contact with
live terminals will result in death or serious
injury.
See section.
Electrical Checks
DANGER
Electrocution. High voltage is present at
transfer switch and terminals. Contact with
live terminals will result in death or serious
injury.
Proceed as follows to complete electrical checks:
1. Verify generator is in OFF mode. A red LED on con-
trol panel illuminates to verify system is OFF.
2. Verify generator MLCB (generator disconnect) is
OFF (OPEN).
3. Turn off all circuit breakers/electrical loads to be
supplied by generator.
4. Turn on utility power supply to transfer switch using
the means provided (such as a utility MLCB).
5. Use an accurate AC voltmeter to verify utility power
source voltage across transfer switch terminals N1,
18
N2, and N3 (if 3-phase). Normal line-to-line voltage
should be equivalent to rated unit voltage.
6. Verify utility power source voltage across terminals
N1, N2, and N3 (if 3-phase) and the transfer switch
neutral lug.
7. Turn off utility power supply to transfer switch when
utility supply voltage is compatible with transfer
switch and load circuit ratings.
8. Press MANUAL on control panel to crank and start
engine.
9. Allow engine to warm up for approximately five mi-
nutes. Set generator MLCB (generator disconnect)
to ON (CLOSED).
and
10. Connect an accurate AC frequency meter across
Hose.
transfer switch terminal lugs E1, E2, and E3 (if 3-
phase) and verify correct rated frequency (50 Hz or
60 Hz).
11. Use an accurate AC voltmeter to verify generator
output voltage across transfer switch terminals E1
to E2, (E2 to E3 and E3 to E1 if 3-phase). Normal
line-to-line voltage should be equivalent to site spe-
cific utility voltage.
12. Successively connect the AC voltmeter test leads
across terminal lugs E1 and Neutral, then E2 and
Neutral (and E3 and Neutral if 3-phase). Line-to-
neutral reading in each case should match utility
voltage reading. Verify generator phase rotation
matches utility phase rotation if system is three-
phase.
13. Set generator MLCB (generator disconnect) to
(D000129)
OFF (OPEN).
14. Press OFF on control panel to shut engine down.
IMPORTANT NOTE: Do not proceed unless generator
AC voltage and frequency are correct and within sta-
ted limits.
Testing Generator Under Load
(D000129)
Proceed as follows to test generator set with electrical
loads applied:
1. Verify generator is in OFF mode. A red LED on con-
trol panel illuminates to verify system is off.
2. Turn off all breakers/electrical loads to be supplied
by generator.
3. Turn off utility power supply to transfer switch, us-
ing the means provided (such as a utility MLCB).
Spark-Ignited Stationary Generators Owner's Manual
DANGER
Electrocution. Do not manually transfer under
load. Disconnect transfer switch from all
power sources prior to manual transfer. Fail-
ure to do so will result in death or serious in-
jury, and equipment damage.
(D000132)