Use and Care Manual

Activation and Startup
Owner’s Manual for Spark-Ignited Stationary Generators 15
Checking Manual Transfer Switch
Operation
(000129)
DANGER
Electrocution. High voltage is present at
transfer switch and terminals. Contact with
live terminals will result in death or serious
injury.
See Manual Transfer Operation section of owner’s man-
ual for procedures.
Electrical Checks
(000129)
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. V
erify generator is in OFF mode. A red LED on
control panel illuminates to verify system is OFF.
2. V
erify generator MLCB (generator disconnect) is
OFF (OPEN).
3. T
urn off all circuit breakers/electrical loads to be
supplied by generator.
4. T
urn 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,
N2, and N3 (if three-phase). Normal line-to-line
voltage should be equivalent to rated unit voltage.
6. V
erify utility power source voltage across terminals
N1, N2, and N3 (if three-phase) and the transfer
switch neutral lug.
7. T
urn off utility power supply to transfer switch when
utility supply voltage is compatible with transfer
switch and load circuit ratings.
8. Pr
ess MANUAL on control panel to crank and start
engine.
9. Allo
w engine to warm up for approximately five
minutes. Set generator MLCB (generator discon-
nect) to ON (CLOSED).
10. Co
nnect an accurate AC frequency meter across
transfer switch terminal lugs E1, E2, and E3 (if
three-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 three-phase). Nor-
mal line-to-line voltage should be equivalent to site
spec
ific utility voltage.
12. Successi
vely connect the AC voltmeter test leads
across terminal lugs E1 and Neutral, then E2 and
Neutral (and E3 and Neutral if three-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
OFF (OPEN).
14. Pr
ess 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 lim
its.
Testing Generator Under Load
(000132)
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 set with electrical
loads applied:
1. V
erify generator is in OFF mode. A red LED on
control panel illuminates to verify system is off.
2. T
urn off all breakers/electrical loads to be supplied
by generator.
3. T
urn off utility power supply to transfer switch,
using the means provided (such as a utility MLCB).
4. Ma
nually set transfer switch to STANDBY, i.e., load
terminals connected to generator’s E1, E2, and E3
(if three-phase) terminals.
5. Press
MANUAL on control panel. Engine will crank
and start.
6. Allow engine to warm up for
a few minutes.
7. Set
generator MLCB (generator disconnect) to ON
(CLOSED). The transfer switch is now powered by
standby generator.
8. T
urn on circuit breaker/electrical loads supplied by
generator.
9. Con
nect 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. Verify with clamp on amp meter to verify
unit is not overloaded.
10. Allow
generator 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.
11. T
urn off electrical loads when testing under load is
complete.
12. Set
generator MLCB (generator disconnect) to
OFF (OPEN).