Testing Generator Under Load; Testing Auxiliary Shutdown Switch Operation - Generac Power Systems D3.4L G16 Extended Tank Installation Manuallines

Operational Checks
9. Press MANUAL key on control panel to crank and
start engine.
10. Allow engine to warm up for approximately five
minutes. Set MLCB switch on generator control
panel up to ON (CLOSED).
IMPORTANT NOTE: Generator power voltage is now
supplied to transfer switch.
DANGER
Electrocution. High voltage is present at
transfer switch and terminals. Contact with live
terminals will result in death or serious injury.
11. Connect an accurate AC voltmeter and a fre-
quency meter across transfer switch terminal lugs
E1, E2, and E3 (if three-phase).
12. Connect AC voltmeter test leads across terminal
lugs E1, E2, and E3 (if three-phase) and neutral;
then across E2 and neutral. Voltage reading in
each case should match utility voltage reading. If
system is three-phase, verify generator phase rota-
tion matches utility phase rotation.
13. Set MLCB on generator control panel down to OFF
(OPEN).
14. Press OFF on control panel to shut engine down.
IMPORTANT NOTE: Do not proceed unless genera-
tor AC voltage and frequency are correct and within
stated limits.

Testing Generator Under Load

DANGER
Electrocution. Do not manually transfer under load.
Disconnect transfer switch from all power sources
prior to manual transfer. Failure to do so will result
in death or serious injury, and equipment damage.
Proceed as follows to test generator with electrical loads
applied:
1. Verify generator is in OFF mode. Red LED above
OFF on control panel illuminates to verify system is
OFF.
2. Turn off all breakers/electrical loads to be powered
by generator.
3. Turn off utility power supply to transfer switch,
using the means provided (such as a utility main
line circuit breaker).
4. Manually set transfer switch to STANDBY, i.e., load
terminals connected to generator's E1, E2, and E3
(if three-phase) terminals. Transfer switch operat-
ing lever should be down.
5. Verify both auxiliary shutdown switches are ON (I).
28
6. Press MANUAL key on control panel. Engine
should crank and start immediately.
7. Allow engine to warm up for approximately five
minutes.
8. Set MLCB on generator control panel to ON
(CLOSED). Loads are now powered by standby
generator.
9. Turn on circuit breaker/electrical loads powered by
generator.
10. Connect a calibrated AC voltmeter and a frequency
meter across terminal lugs E1, E2, and E3 (if three-
phase). Voltage should be approximately unit rated
voltage.
(000129)
11. Allow generator to run at full rated load for 20–30
minutes. Listen for unusual noises, vibration, or
other indications of abnormal operation. Inspect for
oil leaks, evidence of overheating, etc.
12. Turn off electrical loads when testing under load is
complete.
13. Set MLCB on generator control panel to OFF
(OPEN).
14. Allow engine to run at no-load for 2–5 minutes.
15. Press OFF on control panel to shut engine down.
Testing Auxiliary Shutdown Switch
Operation
Equipment Damage. The auxiliary shutdown switch is
not to be used to power down the unit under normal
operating circumstances. Doing so will result in
equipment damage.
Test auxiliary shutdown switches to verify correct opera-
tion.
1. Verify auxiliary shutdown switches are ON (I).
2. Press MANUAL on control panel to start engine.
(000132)
3. With engine running, set one auxiliary shutdown
switch to OFF (O). Engine will shut down immedi-
ately.
• If engine stops, set auxiliary shutdown switch to
ON (I), clear alarm on controller, and restart engine
to verify generator is operating normally. After veri-
fying normal operation of first auxiliary shutdown
switch, verify operation of second auxiliary shut-
down switch.
• If engine does not stop, auxiliary shutdown switch
is not functioning correctly. Stop generator through
control panel, and inspect wiring installation. Con-
tact Generac Technical Support if problem cannot
be identified or if assistance is needed.
Installation Guidelines for Protector Diesel Generators
CAUTION
(000399)