Section 2 — Operation
Guardian
NOTE:
Throughout the “Operation” section, differences in procedures specific to sound attenuated units will be denoted as follows: (SA = information).
2.1USING THE AUTO/OFF/MANUAL
SWITCH (FIGURE 2.1/2.2)
◆2.1.1 “AUTO” POSITION
Selecting this switch position activates fully automat- ic system operation. It also allows you to start and exercise the engine every seven days with the setting of the exercise timer (see Section 3.10, Page 26). This position also is used for remote starting, when it is set up.
◆2.1.2 “OFF” POSITION
This switch position shuts down the engine. This position also prevents automatic operation.
◆2.1.3 “MANUAL” POSITION
Set the switch to MANUAL to crank and start the engine. Transfer to standby power will not occur unless there is a utility failure.
With the switch set to AUTO, the engine may crank and start at any time without warning. Such automatic starting normally occurs when utility power source voltage drops below a preset level or during the normal exercise cycle. To prevent possible injury that might be caused by such sudden starts, always set the switch to OFF and remove the fuse before working on or around the generator or transfer switch. Then, place a “Do Not Operate” tag on the generator panel and on the transfer switch.
Figure 2.1 – Generator Control Panel
(6 kW, 8 kW, 10 kW
Figure 2.2 – Generator Control Panel
(Sound Attenuated)
2.2AUTOMATIC TRANSFER
OPERATION
To select automatic operation, do the following:
1.Make sure the transfer switch main contacts are set to their “Utility” position, i.e., loads connected to the utility power source (Figure 2.3, Page 19).
2.Be sure that normal utility power source voltage is available to transfer switch terminal lugs N1 and N2.
3.Set the generator’s Auto/Off/Manual switch to AUTO.
4.Set the generator’s main circuit breaker to its ON (or closed) position.
With the preceding steps complete, the generator will start automatically when utility source voltage drops below a preset level. After the unit starts, loads are transferred to the standby power source. Refer to “Sequence of Automatic Operation.”
18 Generac® Power Systems, Inc.
