Guardian-technologies 04758-2 Manuale Utente Scaricare il pdf (Pagina 15)

Section 2 — Post Installation Start-up and Adjustments

Air-cooled 7 kW, 12 kW and 15 kW Generators



Do not make any unnecessary adjustments.

Factory settings are correct for most applica-

tions. However, when making adjustments, be

careful to avoid overspeeding the engine.

If this procedure or equipment are not available,

locate the nearest Authorized Dealer and they can

perform the adjustments.

NOTE:

A service fee may be charged for this adjustment.

2.7 ENGINE GOVERNOR ADJUSTMENT

If both AC frequency and voltage are correspondingly

high or low, adjust the engine governor as follows:

2.7.1 7 KW UNITS

1. Loosen the governor clamp bolt (Figures 2.3 and

2.4).

2. Hold the governor lever at its wide open throttle

position, and rotate the governor shaft clockwise

as far as it will go. Then, tighten the governor

lever clamp bolt to 70 inch-pounds (8 N-m).

3. Start the generator; let it stabilize and warm up

at no-load.

4. Connect a frequency meter across the generators

AC output leads.

Figure 2.3 — Single Cylinder Engine Governor

Adjustment

GOVERNOR

SHAFT

PRIMARY

ADJUST

SCREW

GOVERNOR

CLAMP

BOLT

SECONDARY

ADJUST SCREW



5. Turn the primary adjust screw to obtain a fre-

quency reading of 61.5 Hz. Turn the secondary

adjust screw to obtain a frequency reading of

62.5 Hz.

6. When frequency is correct at no load, check the

AC voltage reading. If voltage is incorrect, the volt-

age regulator may require adjustment.

2.7.2 12 KW AND 15 KW UNITS

1. Loosen governor clamp bolt (See Figure 2.4).

Figure 2.4 — V-twin Engine Governor

Adjustment

Governor Clamp Bolt

Governor

Shaft

(Rotate

Clockwise)

Idle Spring

No Load Idle

Adjustment Screw

2. Completely remove the idle spring.

3. With governor arm at wide open throttle position,

rotate governor shaft fully clockwise. Tighten

clamp bolt to 84 inch-pounds.

4. Start unit and apply full load. Use full load speed

adjust screw (Figure 2.5) to adjust frequency to

58 Hz.

Figure 2.5 — V-twin Full Load Speed Adjust

Screw

Full Load Speed Adjust Screw

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1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 55 56

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