Operating Guide

Operation
22 Owner’s Manual for 60 Hz Air-Cooled Generators
7. Set MLCB (generator disconnect) to ON
(CLOSED). Standby power source now powers
loads.
Transfer to Utility Power Source
Shut down generator and transfer to utility source after
utility power has been restored. Proceed as follows to
manually transfer to utility power and shut down genera-
tor:
1. Set MLCB (g
enerator disconnect) to OFF (OPEN).
2. Run
engine for one minute at no-load to stabilize
internal temperature.
3. Press
OFF button on control panel. Engine will
shut down.
4. V
erify utility power supply to transfer switch is
turned off.
5. Set
main contacts to UTILITY (loads connected to
utility power source) using manual transfer handle
(A in Figure 3-11) inside transfer switch.
6. T
urn on utility power supply to transfer switch using
means provided.
7. Pr
ess AUTO button on control panel.
8. Retur
n MLCB (generator disconnect) to ON
(CLOSED).
9. Close and lock lid.
Automatic Transfer Operation
Proceed as follows to select automatic operation:
1. V
erify transfer switch main contacts are set to
UTILITY (loads connected to utility power source).
2. V
erify normal utility power source voltage is avail-
able to loads connected to transfer switch.
3. Pr
ess AUTO button on control panel.
4. Set
MLCB (generator disconnect) to ON
(CLOSED).
Generator will start automatically
when utility source volt-
age drops below a preset level. Loads are transferred to
stand
by power source after unit starts.
Automatic Sequence of Operation
Utility Failure
If generator is set to AUTO when utility fails (below 65%
of nominal), a five second (dealer programmable) line
interrupt delay time is started. The engine cranks and
starts if utility power is still unavailable when timer
expires. An engine warm-up timer will be initiated once
engine is started. Timer duration varies depending on
whether or not Cold Smart Start is enabled. The control-
ler will transfer load to generator
when warm-up time
expires. If utility power is restored (above 80% nominal)
at any time from initiation of engine start until generator is
ready to accept load (warm-up time has not elapsed), the
controller completes start cycle and runs generator
through its normal cool down cycle. However, load will
remain on utility source.
Cranking
The system will control the cyclic cranking as follows:
• 10 kW Unit: five cranking cycles as follows: 15
seconds cranking, seven seconds resting, followed
by four additional cycles of seven seconds crank-
ing followed by seven seconds resting.
• 13–22 kW Units: five cranking cycles as follows:
16 seconds cranking, seven seconds resting, 16
seconds cranking, seven seconds resting, followed
by three additional cycles of seven seconds crank-
ing followed by seven seconds resting.
NOTE: An
alarm will be triggered if generator does not
start after these five attempts.
Cold Smart Start
Cold Smart Start is factory-enabled, but can be disabled
in the EDIT menu. Generator will monitor ambient tem-
perature when Cold Smart Start is enabled. The warm-up
delay w
ill be adjusted based on prevailing conditions.
See Table 3-2. If ambient temperature is below a fixed
temperature (based on model) upon startup in AUTO,
generator
will warm up for 30 seconds. This allows
engine to warm before a load is applied. The generator
will startup with normal warm-up delay of five seconds if
ambient temperature is at or above the fixed tempera-
ture.
Table 3-2. Cold Smart Start Set Points
Generator Size 10 kW–20 kW 22 kW
Fixed Temperature 50 °F (10 °C) 20 °F (-7 °C)
A check for correct output voltage buildup will be per-
formed when generator engine is started.
Cleaning Cycle
If some condition impedes normal voltage creation, such
as frost crystals or dust/dirt preventing a good electrical
connection, start sequence will be interrupted so a clean-
ing cycle of the internal e
lectrical connections can be
attempted.
Cleaning cycle is an extended warm up period which
lasts
for several minutes while normal generator voltage
output is determined to be low. During this cycle, genera-
tor controller will display “W
arming Up” on the display
screen.
The generator controller
display will show “Under Volt-
age” if cleaning cycle fails to clear the obstruction. After
sever
al minutes, alarm message can be cleared, and the
generator restarted.
If the problem persists, make no further attempts to start.
Co
ntact an IASD.