Technical Information
WIRING
Basic electrical connections are illustrated in
Diagram
2 (for the
ESD-5550
,
ESD-5555
and the
ESD-5570
) and
Diagram 3
(for the the
ESD-5556
only). Actuator and battery connections to
Terminals A, B, E,
and
F
should be #16 AWG (1.3 mm
2
) or larger. Long cables require an increased
wire size to minimize voltage drops. The battery positive (+) input,
Terminal F,
should be fused for
15 amps as illustrated.
Magnetic speed sensor wires connected to
Terminals C
and
D
MUST BE TWISTED AND/OR
SHIELDED for their entire length. The speed sensor cable shield should ideally be connected as
shown in
Diagram 2
or
3.
The shield should be insulated to insure no other part of the shield
comes in contact with engine ground, otherwise stray speed signals may be introduced into the
speed control unit. With the engine stopped, adjust the gap between the magnetic speed sensor
and the ring gear teeth. The gap should not be any smaller than 0.020 in. (0.45 mm). Usually,
backing out the speed sensor 3/4 turn after touching the ring gear teeth will achieve a satisfactory
air gap. The magnetic speed sensor voltage should be at least 1 VAC RMS during cranking.
ADJUSTMENTS
Before Starting Engine
Before starting the engine, check and/or adjust the POTs/switches to the following settings. See
Table 2
for the factory presets.
Adjustment/Switch
Potentiometer/Switch
Setting
Applicable
Units
SPEED
25° turn
1470 Hz 1/- 50 Hz w/min trim
all
GAIN
270° turn
50%
all
STABILITY
270° turn
50%
all
DROOP
270° turn
0% (CCW)
all
IDLE
270° turn
1075
±
75 Hz
all
STARTING FUEL RAMP
270° turn
100% (CW) Maximum Fuel
all
SPEED RAMP
270° turn
0% (CCW) Fastest
all
OVERSPEED
25° turn
100% (CW) Highest
all
CRANK TERMINATION
25° turn
0% (CCW) Lowest
ESD-5556 only
SW1 Lead Circuit
switch
ON
all
SW2 Soft Coupling
switch
OFF
all
Start Engine
The speed control unit governed speed setting is factory set at approximately engine idle speed.
(1000 Hz., speed sensor signal) Crank the engine with DC power applied to the governor
system. The governor system should control the engine at a low idle speed. If the engine is
unstable after starting, turn the
GAIN
and
STABILITY
adjustments
CCW
until the engine is
stable.
