Section 2 — Installation

Liquid-cooled 15, 20 and 25 kW Generators

2.8GENERATOR AC NEUTRAL

CONNECTIONS

The manufacturer uses an UNGROUNDED AC neu- tral. Grounding is recommended only at the main service entrance. If the neutral wire is grounded and one of the phase loads becomes grounded, the exces- sive current opens the load circuit breaker or col- lapses the generator field. The actual result depends on the electrical characteristics of the particular installed generator.

The HS Type transfer switch is controlled by the gen- erator circuit board via control wires 23 and 194. Wire 23 connects the relay driver output (collector of an NPN transistor) on the generator circuit board to the "low side" (Terminal 23) of the transfer relay coil in the transfer switch. Wire 194 connects positive battery voltage from the generator circuit board to the "high side" (Terminal 194) of the transfer relay coil in the transfer switch.

2.9AUTOMATIC TRANSFER SWITCH

(ATS MODE)

When this generator, along with an HS Type automat- ic transfer switch has been installed and connected, a circuit board in the generator control panel con- stantly monitors the utility voltage and controls the operation of the transfer switch.

To implement this mode of operation, Position 2 of the eight-position DIP switch, which is located on the generator circuit board (see Figure 3.2), must be in the OFF position. In ATS Mode utility voltage sensing, weekly exercising, and load transferring is under the control of the generator.

Should the utility voltage drop below a preset value, and remain at this low voltage for a preset amount of time, the generator cranks and starts. After the gen- erator starts, the transfer switch transfers the load circuits to the generator so the generator can power them. When the utility source voltage has been restored, the transfer switch re-transfers the load cir- cuits back to the utility source voltage and the gener- ator shuts down.

If generator wires 23 and 194 are not wired to

!the correct terminals in the transfer switch, the circuit board in the generator control panel will be damaged.

In order for the generator utility voltage sensing and battery charging functions to work, it is necessary to provide a 5 amp fused 240Vac utility source connec- tion from the transfer switch main N1 and N2 termi- nals to the generator control panel N1 and N2 termi- nals (See Figure 2.3).

Transfer Switch terminals N1 and N2 (also called Utility 1 and Utility 2) are the input utility AC power connections to the Transfer Switch. Transfer Switch terminals T1 and T2 (also called Load 1 and Load 2) are the transfer switch AC output power terminals that go to the load circuit distribution panel. Transfer Switch terminals E1 and E2 are the AC power termi- nals that come from the generator's main alternator.

Figure 2.3 - Connection Diagram (ATS Mode)

 

 

 

FROM UTILITY

 

 

 

 

 

 

 

 

MAIN LINE

 

 

 

 

 

 

 

 

CIRCUIT

 

 

 

 

 

 

 

 

BREAKER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OR FUSE

 

 

 

 

 

 

 

 

 

 

 

 

FUSE

 

N1 N2

 

 

 

N1

 

 

 

 

T1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

N2

 

 

 

 

T2

 

 

 

FUSE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TO LOAD

FEEDER CIRCUITS

LOAD

DISTRIBUTION

PANEL

GENERATOR

 

194

HS TYPE

23

 

TRANSFER

 

SWITCH

 

E1 E2

 

194

23

178

183

E1 E2

N2 N1

11

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Generac 005030-0 (15kW), 005031-0 (25kW) owner manual Generator AC Neutral Connections, Connection Diagram ATS Mode
Page 12 Page 14

005030-0 (15kW), 005031-0 (25kW) specifications

Generac has long been recognized as a leader in backup power solutions, and its 005031-0 (25kW) and 005030-0 (15kW) home standby generators exemplify the brand's commitment to reliability and performance. Designed for residential use, these generators provide peace of mind during outages, ensuring that homes remain powered even in the most challenging conditions.

One of the standout features of both models is their advanced Generac G-Force engine, which is engineered for longevity and impressive power output. The G-Force engine is built from the ground up for generator use, refined to handle the unique demands of continuous operation. This results in a highly durable system that requires little to no maintenance, making it a favored choice for homeowners looking for a reliable energy solution.

Another important characteristic is the True Power technology featured in both generators. This technology delivers clean, stable power that is safe for sensitive electronics and appliances. It ensures that devices such as computers and medical equipment operate smoothly without the risk of damage from power fluctuations. Additionally, the Generac 005031-0 and 005030-0 generators are equipped with the Quiet-Test mode, allowing them to run at lower RPMs during routine weekly self-tests. This innovation significantly reduces the noise produced during tests, making it less disruptive for residents.

Furthermore, these generators come with a user-friendly interface and a mobile link app, enabling homeowners to monitor their generator's performance remotely via a smartphone. This feature enhances convenience, allowing users to receive alerts and notifications about their generator's status, maintenance needs, and operation conditions right from their devices.

Both the 25kW and 15kW models are also designed with a robust transfer switch, which seamlessly shifts power from the grid to the generator in case of any outages. This automatic transfer feature ensures that homes maintain power without needing manual intervention, making them ideal for those who want uninterrupted electricity.

In terms of fuel source, both models operate on natural gas or propane, providing flexibility to homeowners regarding fuel availability and preferences. With excellent warranty options and Generac's reputation for quality, both the 005031-0 (25kW) and 005030-0 (15kW) generators stand as dependable choices for safeguarding homes from the unpredictability of power outages.
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