Field Wiring, VAC Power Supply Wiring | A.O. Smith 2000, 3400, 2600

•Auto body shops

•Plastic manufacturing plants

•Furniture refinishing areas and establishments

•New building construction

•Remodeling areas

Common household products, pool and laundry products may contain fluorine or chlorine compounds. When these chemicals come in contact with the boiler, they react and can form strong acids. The acid can spoil the boiler wall, causing serious damage and may result in flue gas spillage or boiler water leakage into the building.

If the above mentioned contaminants and corrosive materials chemicals are present near the location of the boiler, make sure to remove the boiler permanently or relocate air inlet and vent terminations to other areas.

FIELD WIRING

120 VAC POWER SUPPLY WIRING

A dedicated, single phase, 30-60 amp (refer to Table 6 on Page

8)circuit breaker with a grounded neutral should be provided to supply power to the boilers. Use #10 AWG wire for the 120 VAC power supply to the boiler. All 120 VAC power supply connections must be made as shown in Figure 14. These connections should be made at the rear of the unit where a wiring junction box is provided. Field installed power supply wiring to the boiler should be installed in conduit. This conduit and wiring should be separate from any other conduit/wiring to guard against EMI (electromagnetic interference).

POWER SUPPLY CHECK

To reduce the possibility of electrical interference with the boiler’s control system the power supply voltage, polarity and ground must be checked. Using an AC volt meter check the 120 VAC power supply wiring from the breaker prior to making power supply connections at the boiler. Confirm the power supply voltage & polarity are correct and that an adequate ground connection is present by performing the three voltage tests below. See Figure 14 for wiring references.

Confirm RMS voltage between:

•H and GND = 108 VAC minimum, 132 VAC maximum.

•N and H = 108 VAC minimum, 132 VAC maximum.

•N and GND = < 1 VAC maximum.

Figure 14. FIELD WIRING

LOW VOLTAGE CONTROL WIRING

1.Header Terminals: In case of Hydronic Boilers, the header terminals are connected to the hydronic loop header sensor. Whereas in case of Hot water Boilers the header terminals are connected to the tank sensor where the temperature can be sensed. See Figure 15.

2.Outdoor Terminals: In case of Hydronic Boilers, they are connected to the outdoor sensors. But in case of Hot water Boilers, they are not connected. See Figure 15. The outdoor sensors must be mounted with cable inlet facing down as shown in Figure 16. The maximum length of the wire connecting from the boiler to the outdoor sensor must be no more than 50 feet.

3.MB2 and COM2 terminals are meant for building management systems.

Figure 15. LOW VOLTAGE CONTROL WIRING

All low voltage control wiring connections must be made as shown in Figure 14. These connections should be made at the rear of the unit where a wiring junction box is provided. Field installed wiring inside 1/2 inch conduit is installed between the junction box on the back of the boiler and the temperature probe and/or field supplied external control being used. This conduit and wiring should be separate from any other conduit/wiring to guard against EMI (electromagnetic interference).

Figure 16. OUTDOOR SENSOR

The outdoor sensor must be mounted in a shaded location, to avoid direct sunlight. It must be atleast 3 feet away from any exhaust, dryer, bathroom or other building vents. It must be located on the north side of th building, above the expected snow line where ice and debris cannot cover it.

3400, 1700, 2000, 2600 specifications

A.O. Smith, a leader in water heating solutions, has developed a range of high-efficiency water heaters that cater to various residential and commercial needs. Among their stellar offerings are the A.O. Smith 2600, 2000, 1700, and 3400 models, each boasting impressive features, cutting-edge technologies, and excellent energy efficiency.

The A.O. Smith 2600 model is designed for those who require a robust water heating solution with a capacity to handle high-demand scenarios. It utilizes a highly efficient heating element that provides rapid heating and maintains a steady output. The built-in smart control system allows users to monitor temperature settings and track energy consumption, ensuring optimal performance.

Next in line, the A.O. Smith 2000 is perfect for households that require a reliable and efficient water heater without compromising on space. This compact model integrates advanced thermal insulation that minimizes heat loss, coupled with a powerful heating element that ensures quick heating times. Its sleek design makes it suitable for various installations while maintaining aesthetic appeal.

The A.O. Smith 1700 model caters specifically to smaller residential needs but retains features that align with higher-end models. It incorporates state-of-the-art safety features, including overheat protection and a pressure relief valve. Its lightweight structure and ease of installation stand out, making it a recommended choice for those looking for efficient heating without extensive modifications to their plumbing systems.

Lastly, the A.O. Smith 3400 is a powerhouse designed for larger commercial applications. This model offers exceptional heating capacities and includes advanced technologies such as a digital display for easy monitoring and control. The robust build is complemented by a high-performance insulation system that significantly reduces energy consumption and operating costs.

All A.O. Smith water heaters, including the 2600, 2000, 1700, and 3400 models, feature corrosion-resistant materials ensuring longevity and durability. With their commitment to quality and innovation, A.O. Smith continues to provide water heating solutions that meet modern demands while emphasizing energy efficiency and user convenience. Whether for residential or commercial use, each model represents the pinnacle of reliability and performance in water heating technology.

In conclusion, A.O. Smith has established itself as a reliable choice for water heaters, with models that cater to diverse needs without compromising on efficiency or quality.