Piping for Special Situations

Certain types of heating systems have additional requirements. Some of the more common variations follow:

1)Indirect Water Heaters – Figure 18 shows typical indirect water heater piping. Boiler piping is the same as for any two-zone system. Figure 18 shows circulator zoning, which is usually preferred for indirect water heaters. Size the circulator and indirect water heater piping to obtain the boiler water flow through the indirect water heater called for by the indirect water heater manufacturer.

2)Gravity and “Large Water Volume” Systems – The piping shown in Figure 19 will minimize the amount of time that the boiler operates with return temperatures below 120F on these systems. A bypass is installed as shown to divert some supply water directly into the return water. The bypass pipe should be the same size as the supply. The two throttling valves shown are adjusted so that the return temperature rises above 120F during the first few minutes of opera- tion. A three-way valve can be substituted for the two throttling valves shown. If the circulator is mounted on the supply, the bypass must be on the discharge side of the circulator.

3)Low Temperature Systems – Some systems, such as radiant tubing systems, require the system water temperature to be limited to a value below the temperature of the water leaving the ODV. These systems also typically have return temperatures well below the 120F minimum.

Figure 20 illustrates the use of a heat exchanger to connect an ODV boiler to this type of system. The heat exchanger will permit the transfer of heat from the boiler water to the low temperature system while holding the system supply and boiler return temperatures within their limits.

For this system to work properly the heat exchanger must be properly sized and the correct flow rates are required on either side of the heat exchanger. Consult the heat exchanger manufacturer for sizing information. The water in the boiler is completely isolated from the water in the system. This means that separate fill and expansion tanks are required for the heating system

loop.

There are several other ways to connect low temperature systems to the non-condensing boilers like the ODV such as four way mixing valve and variable speed injection pumping systems.

ODV-75, ODV-100, ODV-125 specifications

Crown Boiler Company is renowned for producing high-quality heating solutions, and their ODV series is no exception. The ODV-125, ODV-100, and ODV-75 models are part of this advanced product line, designed for residential and light commercial applications. These models exemplify Crown Boiler's commitment to innovation, performance, and efficiency.

One of the main features of the ODV series is its unique vertical design, which helps in optimizing space in various settings, making them ideal for installations where space is at a premium. Each model is engineered to provide reliable heating with output capacities of 125, 100, and 75 MBH respectively. This range allows homeowners to select a unit that best meets their specific heating demands, ensuring comfort without unnecessary energy expenditure.

Technology plays a crucial role in the performance of the ODV series. The units are equipped with stainless steel burners that provide enhanced durability and efficiency. These burners are designed to achieve high combustion efficiency, minimizing fuel consumption and reducing emissions. Additionally, the ODV models feature an integrated electronic ignition system which ensures a reliable start-up and reduces the wear and tear associated with traditional standing pilot systems.

When it comes to construction, the ODV series units are built with a heavy-duty steel casing that provides excellent thermal insulation. This design not only contributes to the efficiency of the boilers but also ensures quiet operation, making them suitable for residential environments. The corrosion-resistant heat exchanger further enhances longevity, providing homeowners with peace of mind regarding their investment.

Another characteristic that sets the ODV series apart is its versatility. These boilers can be configured for use with multiple heating applications, including hot water supply and radiant heating systems. The ODV models also feature easy access to internal components for maintenance and servicing, which is a significant advantage for HVAC professionals.

In summary, the Crown Boiler ODV-125, ODV-100, and ODV-75 models represent the pinnacle of residential heating technology. With their efficient design, advanced burner technology, and ease of maintenance, these units are sure to provide reliable performance for years to come. Whether for a cozy home or a light commercial space, the ODV series offers a solution that balances comfort, efficiency, and durability.