Product Manual

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Operation

24 Owner’s Manual for Stationary Diesel Generators

Transfer Switch Manual Operation

Prior to automatic operation, manually exercise transfer

switch to verify there is no binding or interference with

correct operation of the mechanism. Manual operation of

transfer switch is required if automatic operation fails.

IMPORTANT NOTE: Always use applicable transfer

switch owner's manual for actual manual transfer

switch operation instructions. The information pre-

sented here describes a typical V-style transfer

switch, which is not used for three phase applica-

tions.

Transfer to Generator Power

Proceed as follows to manually transfer to standby power

and start generator when utility power fails:

1. Press OFF on control panel. A red LED illuminates

to verify system is OFF.

2. Set MLCB switch to OFF (OPEN).

3. Turn off utility power supply to transfer switch using

the means provided (such as a utility MLCB).

4. See Figure 4-3. Use manual transfer handle (A)

inside transfer switch to set main contacts to

STANDBY (loads connected to standby power

source) (C).

Figure 4-3. Manual Transfer Switch Operation

(Typical)

5. Press MANUAL on control panel. Engine cranks

and starts.

6. Allow engine to run for two minutes to bring it up to

normal operating temperature.

7. Set MLCB switch to ON (CLOSED).

NOTE: V-style transfer switch not used for three-phase

applications.

Transfer Back to Utility Power

Proceed as follows to manually transfer back to utility

power and shut down generator when utility power is

restored:

NOTE: Verify utility voltage has returned and is at the

correct value.

1. Set MLCB switch to OFF (OPEN).

2. Allow engine to run for two minutes at no-load to

bring it up to normal operating temperature.

3. Press OFF on control panel to shut down engine.

4. Verify utility power supply to transfer switch is

turned off.

5. Use manual transfer handle inside transfer switch

to set main contacts to UTILITY (B) (loads con-

nected to utility power source).

6. Turn on utility power supply to transfer switch using

the means provided.

7. Press AUTO on control panel. A green LED illumi-

nates to verify system is in AUTO.

(000132)

DANGER

Electrocution. Do not manually transfer under load.

Disconnect transfer switch from all power sources

prior to manual transfer. Failure to do so will result

in death or serious injury, and equipment damage.

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