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Post Installation Start-up and Adjustments
2.2
CHECK TRANSFER SWITCH
OPERATION
Refer to the "Manual Transfer Operation" section, of the owner's
manual for procedures.
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 sup-
plies 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 breakers on the load center of the transfer box (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 break-
er).
The transfer switch is now electrically
"hot." Contact with "hot" parts will result in
extremely hazardous and possibly fatal elec-
trical shock. Proceed with caution.
5.
Use an accurate AC voltmeter to check utility power source
voltage across transfer switch terminals N1 and N2. Nominal
line-to-line voltage should be 240 volts AC.
6.
Check utility power source voltage across terminals N1 and
the transfer switch neutral lug; then across terminal N2 and
neutral. Nominal line-to-neutral voltage should be 120 volts
AC.
7.
When certain that utility supply voltage is compatible with
transfer switch and load circuit ratings, turn OFF the utility
power supply to the transfer switch.
8.
On the generator panel, set the AUTO/OFF/ MANUAL switch to
MANUAL. The engine should crank and start.
9.
Let the engine warm up for about five minutes to allow inter-
nal temperatures to stabilize. Then, set the generator's main
circuit breaker to its ON (or CLOSED) position.
Proceed with caution! Generator power volt-
age is now supplied to the transfer switch.
Contact with live transfer switch parts will
result in dangerous and possibly fatal electri-
cal shock.
12
10. Connect an accurate AC voltmeter and a frequency meter
across transfer switch terminal lugs E1 and E2. 7kW voltage
should be 242-252 volts at a frequency of 61-63 Hertz. 10,
13, and 16kW voltage should be 247-249 volts at a frequency
of 57.5-59.5 Hertz.
11. Connect the AC voltmeter test leads across terminal lugs E1
and neutral; then across E2 and neutral. In both cases, volt-
age reading should be 121-126 volts AC (7kW), and 125-126
volts AC (10, 13 and 16kW).
12. Set the generator's main circuit breaker to its OFF (or OPEN)
position. Let the engine run at no-load for a few minutes to
stabilize internal engine generator temperatures.
13. Set the generator's AUTO/OFF/MANUAL switch to OFF. The
engine should shut down.
It is important not to proceed until certain that generator AC
voltage and frequency are correct and within the stated limits.
Generally, if both AC frequency and voltage are high or low,
the engine governor requires adjustment* (*GH410 only). If
frequency is correct, but voltage is high or low, the generator's
voltage regulator requires adjustment.
2.4
GENERATOR TESTS UNDER
LOAD
To test the generator set with electrical loads applied, proceed as
follows:
1.
Set generator's main circuit breaker to its OFF (or OPEN) posi-
tion.
2.
Turn OFF all breakers on the load center of the transfer box (T1
and T2).
3.
Set the generator's AUTO/OFF/MANUAL switch to OFF.
4.
Turn OFF the utility power supply to the transfer switch,
using the means provided (such as a utility main line circuit
breaker).
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 sup-
plies will result in extremely hazardous and
possibly fatal electrical shock.
5.
Manually set the transfer switch to the STANDBY position, i.e.,
load terminals connected to the generator's E1/E2 terminals.
The transfer switch operating lever should be down.
6.
Set the generator's AUTO/OFF/MANUAL switch to MANUAL.
The engine should crank and start immediately.
7.
Let the engine stabilize and warm up for a few minutes.
8.
Set the generator's main circuit breaker to its ON (or closed)
position. Loads are now powered by the standby generator.
9.
Turn ON the load center of the transfer switch (T1 and T2).
NOTE:
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