ELECTRICAL

6. ELECTRICAL

Install all electrical wiring in accordance with the National Electrical Code and local requirements.

NOTICE

This unit when installed must be electrically grounded in accordance with the requirements of the authority having jurisdiction or, in the absence of such requirements, with the current edition of the National Electrical Code, ANSI/NFPA 70 and/or the Canadian Electrical Code, Part 1 CSA C22.1, Electrical Code.

A. WIRING

C. CONTROLS

1.See Figure 6.1 for location of wiring and controls. Use Figures 6.2 and 6.3 to connect the boiler to a power supply and to connect components to the boiler.

2.Connect the boiler by a separate, permanently live electrical supply line with a fused switch.

3.Connect the vent damper harness to the damper motor as shown in Figure 6.1.

4.Adjust the thermostat heat anticipator to 0.2 Amp.

B.ZONED SYSTEM WIRING

See Figure 6.5 for typical wiring with zone valves. See Figure 6.6 for typical wiring with zone circulators. When wiring a zoned heating system, follow all applicable codes, ordinances and regulations.

NOTICE

Do not power zone valves directly from the boiler limit. Doing so will greatly reduce the life of the transformer. Use a separate transformer sized to handle the total of all zone valve electrical loads.

1.For proper location of controls and accessories refer to Figure 6.1 and Section 11.

2.See the attached control sheets for specific details regarding the installation of the various controls.

3.This boiler is supplied with safety devices in addition to the limit. For a description of these devices and how they work to ensure the safe operation of the boiler, see Section 7B.

4.If the circulator is mounted in the supply piping, provide longer wiring harness as required.

Figure 6.1: Wiring, Controls and Safety Devices

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PB Heat MI/MIH series manual Electrical, Wiring Controls, Zoned System Wiring

MI/MIH series specifications

The PB Heat MI/MIH series represents a significant advancement in the realm of cast iron boilers, engineered for high efficiency and reliable performance in both residential and light commercial applications. Crafted with exceptional care, these boilers combine traditional design elements with modern technologies to optimize heating capabilities.

A standout feature of the MI/MIH series is its construction. Made from high-quality cast iron, the boiler body is built to withstand the test of time while providing superior heat retention. This material ensures consistent heating over extended periods, reducing the need for frequent cycling on and off, which enhances overall efficiency.

The MI/MIH series incorporates a versatile design that accommodates various heating systems, including hot water heating and steam applications. This flexibility is a key selling point, as it allows homeowners and business operators to tailor their heating solutions to specific needs. Additionally, the units are compatible with multiple fuels, including oil and natural gas, making them a practical option for diverse environments.

Efficiency is another critical component of the MI/MIH series. The boilers are designed to operate at high efficiency levels, often surpassing industry standards. Many models in this series feature advanced combustion technology that maximizes fuel use while minimizing emissions. This not only supports environmental sustainability but also results in lower utility bills for consumers.

The MIH variant, specifically, offers additional features like an integrated secondary heat exchanger, which enhances heat transfer and further improves efficiency. Maintenance is made simple, thanks to thoughtful engineering. With large clean-out ports and easily accessible components, routine maintenance can be performed with ease, reducing downtime and extending the boiler's lifecycle.

Moreover, safety is a fundamental aspect of the MI/MIH series. These boilers include multiple safety features, such as automatic safety shutdown systems and built-in pressure controls, ensuring safe operation under various conditions.

In summary, the PB Heat MI/MIH series cast iron boilers stand out due to their durability, versatility, high efficiency, and robust safety features. These models cater to a range of heating requirements, making them a reliable choice for those seeking long-term heating solutions that prioritize both performance and sustainability. As homeowners and businesses look for dependable and efficient heating options, the MI/MIH series remains a prominent player in the industry.