CONTROL OPERATION
-
LPG
FUELED
Starting
Placing the start/stop switch (Sl) in the start position
connects battery negative
(B-)
to the start relay coil
(KI).
This energizes the start relay, which closes the
K1-
1
/K1-2 relay contacts that connect battery positive
(B+)
to
the starter motor
(61).
It
also connects
B+
to the K4
priming solenoid and
E2
fuel solenoid, through fuse
F2
and diode CRl. Battery positive (B+) is also supplied
to
the voltage regulator (pin
7),
for the generator field wind-
ing, through the start disconnect relay
(K2)
normally
closed contacts (K2-2/K2-6).
Connecting battery positive
(B+)
as described produces
the following control responses:
Flashes the generator field winding
to
ensure that
there is adequate residual magnetism to inducevol-
tage buildup.
0
Energizes the starter motor (Bl).
Energizes the priming solenoid (E4) and the fuel
solenoid
(E2)
allowing fuel to flow
to
the carburetor.
Closing the start solenoid (Kl) contacts connects the
battery positive (B+) to the starter motor, which begins to
crank the engine to initiate starting.
Starter Lockout-Run
As
theengine comesup tospeed, the power outputfrom
the generator is applied to the start disconnect relay (K2)
and causes it to energize. Engergizing the K2 relay
opens the K2-1/K2-5 and K2-2/K2-6 contacts and
closes
the K2-3/K2-5 contacts. This produces the
fol-
lowing control responses:
0
Opening the K2-2/K2-6 contacts disconnects
B+
from
the voltage regulator
0
Closing the
K2-3/K2-5
contacts applies
B+
to
the
fuel solenoid (E2) through fuse F1, providing fuel
flow
to
the carburetor.
As
the engine begins
to
run, the startlstop switch
should be released.Theswitch will automatically return
to
the center (Run) position and theengine will continue
to run. The start disconnect relay (K2) will remain ener-
gized and the start solenoid (Kl) remains de-energized.
Charging Circuit
The charging circuit supplies generator battery charge
voltage (20
f
2 volts) that is rectified to
DC
by diode
(CR2) and supplied to the battery through the charge
resistor
(Rl).
This charges the battery at a variable rate
(1 ampere maximum) during set operation. The charge
rate varies with the generator load and battery
condition.
Stopping
Placing the start/stop switch (Sl) in the stop position
energizes the K3 relay, which causes the K3-30/K3-87
contacts
to
close and ground the output from the mag-
neto assembly (G2) and stops the engine.
As
the generator output voltage drops, the start discon-
nect relay (K2) de-energizes, opening contacts
K2-3/K2-5. This causes the E2 fuel solenoid
to
open
and stop fuel flow
to
the regulator.
Diode CR2 prevents the battery from discharging
through the generator windings when the set is not
running.
Opening the K2-1/K2-5 contacts disconnects
B+
from the start solenoid (Kl) de-energizing
it
and
causing the K1-1 /K1-2 contacts
to
open. This dis-
connects
B+
from the start motor (Bl) and the K4
priming solenoid.
7-3
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