15
3.2.2 “OFF”
POSITION
This switch position shuts down the engine. This
position also prevents automatic operation.
Figure 3.1 – Generator Control Panel
12 VDC
ACCESSORY
OUTLET 7.5A MAX
EXERCISE
SYST
TIME
SET
AUTO
7.5A
OUTLET FUSE
OFF
MAN.
F L A S H I
N
L E D =
4
F L
S H
R E
L E D S =
N O
S E N S E
E X E R
R
N O T
S E T
OVER CRANK
LOW OIL
OVER SPEED
HIGH TEMP.
SYSTEM SET
EXTERNAL
CIRCUIT
BREAKER
GFCI
3.2.3 “MANUAL”
POSITION
Set the switch to MANUAL to crank and start the
engine. Transfer to standby power will not occur
unless there is a utility failure.
With the switch set to AUTO, the engine may
crank and start at any time without warning.
Such automatic starting normally occurs when
utility power source voltage drops below a pre-
set level or during the normal exercise cycle. To
prevent possible injury that might be caused
by such sudden starts, always set the switch to
OFF and remove the fuses before working on or
around the generator or transfer switch. Then,
place a “DO NOT OPERATE” tag on the genera-
tor panel and on the transfer switch.
3.3
AUTOMATIC TRANSFER
OPERATION
To select automatic operation, do the following:
1. Make sure the transfer switch main contacts are
set to their UTILITY position, i.e., loads con-
nected to the utility power source (Figure 3.2).
2. Be sure that normal UTILITY power source volt-
age is available to transfer switch terminal lugs
N1 and N2.
3. Set the generator’s AUTO/OFF/MANUAL switch to
AUTO.
4. Set the generator’s main circuit breaker to its ON
(or closed) position.
With the preceding steps complete, the generator will
start automatically when utility source voltage drops
below a preset level. After the unit starts, loads are
transferred to the standby power source. Refer to
Section 3.4, “Sequence of Automatic Operation.”
3.3.1 12 VDC ACCESSORY OUTLET
Your generator is equipped with a 12 VDC accessory
outlet in the Generator Control Panel. (Figure 3.1)
With the generator running or in standby mode, this
outlet may be used to temporarily power low power
accessories such as a work light, cell phone, radio or
any other automotive style accessory. This outlet is
capable of delivering a MAXIMUM of 7.5 Amps. If the
accessory to be used through this circuit demands
too much power, the fuse that protects this circuit
will melt open and the circuit will not be functional.
This 12 VDC outlet draws power from the gen-
erator's starting battery and extended use of
this outlet may drain the battery and the
engine may not start. This outlet should NOT be
used for battery charging.
3.3.2 120 VAC GFCI OUTLET
Your generator is equipped with an external, 15 amp,
120 volt, GFCI convenience outlet that is located in
the right rear of the generator enclosure. (Figures
1.1 and 1.2) When the generator is running, in the
absence of utility power, this outlet may be used
to power items outside your home such as lights
or power tools. This outlet may also be used when
utility power is present by running the generator in
manual mode. This oultlet does not provide power if
the generator is not running. This outlet is protected
by a 15-amp circuit breaker located in the generator
control panel. (Figure 3.1).
3.4
SEQUENCE OF AUTOMATIC
OPERATION
The generator’s control panel houses a control logic
circuit board. This board constantly monitors util-
ity power source voltage. Should that voltage drop
below a preset level, circuit board action will signal
the engine to crank and start. After the engine starts,
the circuit board signals the transfer switch to acti-
vate and connect load circuits to the standby power
supply (load terminal lugs T1/T2 connect to terminal
lugs E1/E2).
Upon restoration of utility source voltage above a
preset level, generator circuit board action signals the
transfer switch to transfer loads back to that power
supply. After retransfer, the engine is signalled to shut
down.
The actual sequence of operation is controlled by
sensors and timers on a control logic circuit board,
as follows:
A. Utility Voltage Dropout Sensor
• This sensor monitors utility source voltage.
Section 3 — Operation
Air-cooled 7 kW, 12 kW and 15 kW Generators
