Generac Power Systems PowerPact 7.5 kW, Руководство по установке

Страница: 36 / 52

Control Panel/Start-Up/Testing
32 Installation Guidelines for 60 Hz PowerPact™
10. Connect an accurate AC voltmeter and a
frequency meter across transfer switch terminal
lugs E1 and E2. At no load, voltage should be 236–
240 at a frequency of 62–63 Hz. If voltage is not
correct, verify the MLCB is closed and verify AC
output and frequency (Hertz or Hz) at the MLCB.
Also verify wiring from generator to E1 and E2 lugs
at transfer switch.
11. Connect the AC voltmeter test leads across
terminal lugs E1 and neutral; then across E2 and
neutral (if wired with a neutral). In both cases,
voltage reading should be 118–120 volts AC. If
voltage is not correct, verify the MLCB is closed
and verify AC output between the E1 and E2 of the
MLCB and Neutral at the generator.
12. Verify wiring from generator to E1, E2 and Neutral
lugs at transfer switch.
13. Set the generator main circuit breaker to OFF or
OPEN.
14. Push the generator OFF button. The engine should
shut down.
NOTE: It is important not to proceed until certain
generator AC voltage and frequency are correct and
within the stated limits.
Generator Tests Under Load
To test the generator set with electrical loads applied,
proceed as follows:
1. Verify generator is OFF.
2. Turn OFF all breakers/electrical loads to be
powered by the generator.
3. Turn OFF the utility power supply to the transfer
switch, using the means provided (such as a utility
main line circuit breaker).
4. Manually set the transfer switch to the STANDBY
position; e.g. load terminals connected to the
generator’s E1/E2 terminals. The transfer switch
operating lever should be down.
5. Push the generator MANUAL button. The engine
should crank and start immediately.
6. Let the engine stabilize and warm up for a few
minutes.
7. Set the generator main circuit breaker to ON or
CLOSED. Loads are now powered by the standby
generator.
8. Turn ON the circuit breaker/electrical loads
powered by the generator one by one.
9. Connect a calibrated AC voltmeter and a frequency
meter across terminal lugs E1 and E2. Voltage
should be approximately 240 volts and frequency
should be 60 Hz. If the voltage and frequency are
rapidly dropping as the loads are applied, the
generator may be overloading or there may be a
fuel issue. Check amperage value of loads and/or
fuel pressure.
10. Let the generator run at full rated load for 20–30
minutes. Listen for unusual noises, vibration or
other indications of abnormal operation. Check for
oil leaks, evidence of overheating, etc.
11. Verify gas pressure while under full load.
12. When testing under load is complete, turn OFF
electrical loads.
13. Set the generator main circuit breaker to OFF or
OPEN.
14. Let the engine run at no-load for 2–5 minutes.
15. Push the generator OFF button. The engine should
shut down.
Checking Automatic Operation
To check the system for proper automatic operation,
proceed as follows:
1. Verify generator is OFF.
2. Install front cover of the transfer switch.
3. Turn ON the utility power supply to the transfer
switch, using the means provided (such as a utility
main line circuit breaker).
NOTE: Transfer switch will transfer back to utility
position.
4. Set the generator main circuit breaker to ON or
CLOSED.
5. Push the generator AUTO button. The system is
now ready for automatic operation.
6. Turn OFF the utility power supply to the transfer
switch.
With the generator ready for automatic operation, the
engine should crank and start when the utility source
power is turned OFF after a five (5) second delay (factory
default setting). After starting, the transfer switch should
connect load circuits to the standby side after a six (6)
second delay (or a 30 second delay in cold weather).
NOTE: The transfer delay may change depending on
environmental conditions. Refer to “Utility Failure” in the
Owner’s Manual for more information.
Let the system operate through its entire automatic
sequence of operation.
NOTE: Loss of utility power will cause either the AUTO
or OFF or MANUAL button to flash depending on which
mode the generator is in at the time of utility loss.
(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.