Section 3 — Operation

ATS “HS” Type Transfer Switch

DANGER

PROCEED WITH CAUTION. GENERATOR OUT- PUT VOLTAGE IS NOW BEING DELIVERED TO TRANSFER SWITCH TERMINALS. CONTACT WITH LIVE TERMINALS RESULTS IN EXTREMELY DANGEROUS AND POSSIBLY FATAL ELECTRI- CAL SHOCK.

7.With an accurate AC voltmeter and frequency meter, check the no-load, voltage and frequency. Single-phase generator supply:

Measure across ATS terminal lugs E1 to E2. Also check E1 to NEUTRAL and E2 to NEUTRAL.

a. Frequency

60-62 Hertz

b. Terminals E1 to E2

240-246 VAC

c. Terminals E1 to NEUTRAL

120-123 VAC

d. Terminals E2 to NEUTRAL

120-123 VAC

8.Set the generator’s main circuit breaker (CB1) to its OFF or OPEN position.

9.Set the AUTO/OFF/MANUAL switch to the OFF position to shut down the generator.

NOTE:

Do NOT proceed until generator AC output voltage and frequency are correct and within stated limits. If the no-load voltage is correct but no-load fre- quency is incorrect, the engine governed speed probably requires adjustment. If no-load frequen- cy is correct but voltage is not, the voltage regula- tor may require adjustment.

3.4GENERATOR TESTS UNDER LOAD

1.Set the generator's main circuit breaker to its OFF or OPEN position.

2.Manually actuate the transfer switch main con- tacts to their EMERGENCY (STANDBY) position. Refer to Manual Operation (Section 3.2).

3.To start the generator, set the AUTO-OFF- MANUAL switch to MANUAL. When engine starts, let it stabilize for a few minutes.

4.Turn the generator's main circuit breaker to its ON or CLOSED position. The generator now pow- ers all LOAD circuits. Check generator operation under load as follows:

•Turn ON electrical loads to the full rated wattage/amperage capacity of the generator.

DO NOT OVERLOAD.

•With maximum rated load applied, check voltage and frequency across transfer switch terminals E1 and E2. Voltage should be greater than 230 volts and frequency should be greater than 59 Hertz.

•Let the generator run under rated load for at least 30 minutes. With unit running, listen for unusual noises, vibration, overheating, etc., that might indicate a problem.

5.When checkout under load is complete, set main circuit breaker of the generator to its OFF or OPEN position.

6.Let the generator run at no-load for several minutes. Then, shut down by setting the AUTO- OFF-MANUAL switch to its OFF position.

7.Move the switch's main contacts back to their UTILITY position. For example, load connected to UTILITY power supply. Refer to Manual Operation (Section 3.2). Handle and operating lever of transfer switch should be in UP position.

8.Turn on the UTILITY power supply to transfer switch, using whatever means provided (such as a UTILITY main line circuit breaker). The UTILI- TY power source now powers the loads.

9.Set the generator's AUTO-OFF-MANUAL switch to its AUTO position. The system is now set for fully automatic operation.

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Generac Power Systems 004635-3, 004678-2 owner manual Generator Tests Under Load, Do not Overload
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004678-2, 004635-3, 004678-2 specifications

Generac Power Systems is a prominent name in the field of backup power generation, renowned for their wide array of innovative products designed to meet diverse energy needs. Among their extensive catalog, the Generac models 004635-3 and 004678-2 stand out, showcasing cutting-edge features and technologies that provide reliable power solutions for both residential and commercial applications.

The Generac 004635-3 is a robust standby generator that operates on a reliable liquid propane or natural gas fuel source. One of its main features is the True Power Technology, which ensures smooth operation of sensitive electronics such as computers and televisions, minimizing the risk of damage during power outages. With its powerful engine and efficient design, this generator can produce substantial wattage to power essential appliances and systems, providing peace of mind during electrical failures.

A notable characteristic of the 004635-3 is its automatic transfer switch that seamlessly detects utility outages and activates the generator within seconds. This quick response time is crucial, as it guarantees that your home remains functional during unexpected power interruptions. Additionally, the model is equipped with a mobile link remote monitoring feature that allows users to track performance and status through an app, ensuring they are always informed about their backup power system.

On the other hand, the Generac 004678-2 also carries the hallmark of high-performance and reliability, making it an excellent choice for larger applications. This model features an innovative, noise-reducing enclosure that not only minimizes sound output but also enhances durability against harsh weather conditions. The generator also boasts a user-friendly control panel with digital display technology, providing a straightforward interface for monitoring and managing the system.

A standout technology in the 004678-2 is the G-Force engine, designed for optimal performance and longevity. This engine emphasizes low-maintenance operation, reducing the frequency of service intervals and ensuring the generator runs efficiently for years. The model's large fuel tank further extends its run time, ensuring users have sufficient power during extended outages.

In summary, both the Generac 004635-3 and 004678-2 models exemplify the company’s commitment to quality and innovation. These generators integrate advanced technology, robust design, and user-friendly features, making them ideal solutions for anyone seeking reliable backup power. With Generac, customers can take comfort in knowing they have a dependable power source at their fingertips in any emergency situation.
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