GAC ESD-5556 Technische informatie - Pagina 2

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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

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

SPEED

GAIN

STABILITY

DROOP

IDLE

STARTING FUEL RAMP

SPEED RAMP

OVERSPEED

CRANK TERMINATION

SW1 Lead Circuit

SW2 Soft Coupling

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.

Technical Information

Potentiometer/Switch

25° turn

270° turn

25° turn

switch

) or larger. Long cables require an increased

Setting

1470 Hz 1/- 50 Hz w/min trim

50%

0% (CCW)

1075± 75 Hz

100% (CW) Maximum Fuel

0% (CCW) Fastest

100% (CW) Highest

0% (CCW) Lowest

OFF

Applicable Units

all

ESD-5556 only

all