Install Manual

Control Panel
38 Installation Guidelines for Air-Cooled Generators
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 to simulate a power outage.
NOTE: Do not remove the N1 and N2 fuses in order to simulate an outage.
8. On the generator panel, push the MANUAL button. The engine should crank and start.
9. Let the engine warm up for about five minutes to allow internal temperatures to stabilize. Then, set the genera-
tor’s main circuit breaker to its ON (or closed) position.
Proceed with caution! Generator power voltage is now supplied to the transfer
switch. Contact with live transfer switch parts will result in dangerous and possibly
fatal electrical shock.
10. Connect an accurate AC voltmeter and a frequency meter across transfer switch terminal lugs E1 and E2. Volt-
age should be 238-242 at a frequency of 59.5-60.5 Hertz. If it’s not, verify that 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. In both
cases, voltage reading should be 119-121 volts AC. If it’s not, verify that the MLCB is closed and verify AC output
between the E1 and E2 of the MLCB and Neutral at the generator. Also, verify wiring from generator to E1, E2
ans Neutral lugs at transfer switch.
12. Set the generator’s main circuit breaker to its OFF (or OPEN) position.
13. Push the generator’s OFF button. The engine should shut down.
NOTE: It is important not to proceed until certain that generator AC voltage and frequency are correct and
within the stated limits.
7.6 — Generator Tests Under Load
To test the generator set with electrical loads applied, proceed as follows:
1. Ensure that the generator is OFF.
2. Turn OFF all breakers/electrical loads that will 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 cir-
cuit breaker).
Do not attempt manual transfer switch operation until all power voltage supplies to
the transfer switch have been positively turned off. Failure to turn off all power volt-
age supplies will result in extremely hazardous and possibly fatal electrical shock.
4. 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.
5. Push the generator’s 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’s main circuit breaker to its ON (or CLOSED) position. Loads are now powered by the standby
generator.
8. Turn ON the circuit breaker/electrical loads that are 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.
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