Installation Guide

Control Panel Startup / Testing
Installation Guidelines for 60 Hz Air-Cooled Generators 39
Checking Manual Transfer Switch
Operation
See Manual Transfer Operation section of owner’s man-
ual for procedures.
Electrical Checks
Proceed as follows to complete electrical checks:
1. Verify generator is in OFF mode.
2. Set generator MLCB (generator disconnect) to
OFF (OPEN).
3. Turn off all circuit breakers/electrical loads to be
supplied by generator.
4. Turn on utility power supply to transfer switch using
means provided (such as a utility MLCB).
5. Use a calibrated AC voltmeter to verify utility power
source voltage across transfer switch terminals N1
and N2. Nominal line-to-line voltage should be 240
volts AC. If voltage is incorrect, verify AC output
and wiring from utility source to N1 and N2 lugs at
transfer switch.
6. Verify utility power source voltage across terminals
N1 and transfer switch neutral lug; then across ter-
minal N2 and neutral. Nominal line-to-neutral volt-
age should be 120 volts AC (if wired with a
neutral). If voltage is incorrect, verify AC output and
wiring from utility source to N1 and N2 lugs at
transfer switch.
7. Turn off utility power supply to transfer switch when
utility supply voltage is verified to meet specifica-
tion provided in Step 6.
8. Press MANUAL mode button on generator panel.
The engine will crank and start. Record cranking
fuel pressure: ______________.
9. Allow engine to warm up for approximately five
minutes for internal temperatures to stabilize. Then
set generator MLCB (generator disconnect) to ON
(CLOSED). Record running fuel pressure:
______________.
10. Connect a calibrated accurate AC voltmeter and a
frequency meter across transfer switch terminal
lugs E1 and E2. Voltage should be 238–242V at a
frequency of 59.5–60.5 Hz. If voltage is incorrect,
verify generator MLCB (generator disconnect) is
closed, and verify AC output and frequency (Hertz
or Hz) at generator MLCB (generator disconnect).
Verify wiring from generator to E1 and E2 lugs at
transfer switch.
11. Connect AC voltmeter test leads across terminal
lugs E1 and neutral, then across E2 and neutral (if
wired with a neutral). In both cases, voltage read-
ing should be 119–121 volts AC. If voltage is incor-
rect, verify generator MLCB (generator disconnect)
is closed, and verify AC output between E1 and E2
of generator MLCB (generator disconnect) and
neutral at generator.
12. Verify wiring from generator to E1, E2, and neutral
lugs at transfer switch.
13. Set generator MLCB (generator disconnect) to
OFF (OPEN).
14. Press generator OFF mode button. The engine will
shut down.
IMPORTANT NOTE: DO NOT proceed until generator
AC voltage and frequency are correct and within
stated limits.
Generator Tests Under Load
Proceed as follows to test generator with electrical loads
applied:
1. Verify generator is in OFF mode.
2. Set generator MLCB (generator disconnect) to
OFF (OPEN).
3. Turn off all circuit breakers/electrical loads to be
supplied by generator.
4. Turn off utility power supply to transfer switch using
means provided (such as a utility MLCB).
5. Manually set transfer switch to STANDBY, with
load terminals connected to generator’s E1/E2 ter-
minals. Transfer switch operating lever should be
down.
6. Press generator MANUAL button. Engine will crank
and start immediately.
7. Verify fuel pressure while cranking. Record crank-
ing fuel pressure:________
8. Allow engine to stabilize and warm up for a few
minutes.
(000129)
DANGER
Electrocution. High voltage is present at
transfer switch and terminals. Contact with live
terminals will result in death or serious injury.
(000129)
DANGER
Electrocution. High voltage is present at
transfer switch and terminals. Contact with live
terminals will result in death or serious injury.
(000132)
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.
DANGER