X. Domestic Water Piping

CAUTION

If the MWC is connected to a water supply having a hardness in excess of 200PPM, scale may prematurely form in the DHW heat exchanger, significantly shortening its life. If necessary, soften the water upstream of the cold water connection to the MWC.

If the MWC is equipped for domestic hot water (DHW) production, connect the domestic hot water piping as shown in Figure 10.1. Connections to the boiler are made with 1/2” copper tail pieces as shown in Figure

10.2.Solder the first fitting to these tail pieces before mounting them on the boiler. The components in this system and their functions are as follows:

1)Anti-scald Devices (Required - Not Shown) - Install anti-scald protection devices in accordance with local codes. In the absence of any local Codes, install such devices as required by the Uniform Plumbing Code (IAPMO UPC).

WARNING

Like all domestic water heaters, the MWC is capable of generating water that is hot enough to cause injury or death due to scalding. To minimize the risk of scalding:

•Set domestic hot water (DHW) thermostat as low as possible (see the Start-up Section of this manual for the location of this thermostat.

•Feel water before showering or bathing.

•If anti-scald or anti-chill protection is required, use devices specifically designed for such service. Install and maintain these devices in accordance with the manufacturer’s instructions.

2)Flow Restrictor (Recommended) - If domestic hot water is drawn from the MWC at a rate in excess of the rating in Table 2.2, the temperature of the hot water may be too low to be of use. The use of a flow restrictor will prevent this problem by limiting the rate at which water can pass through the DHW heat exchanger. If a restrictor is used, select one having a rating in GPM approximately equal to that shown in Table 2.2.

3)Pressure Relief Valve (Required) - Limits the pressure in the domestic hot water piping. Use a valve designed for DHW service, such as the Watts #3L or #53L. Note that this is a pressure relief valve, not a T&P valve. Select a valve with a pressure setting less than or equal to 145 psi. Pipe the discharge to a safe location using piping the same size as the discharge connection on the valve.

4)Hose Bib Valves (Recommended) - These valves permit the DHW plate heat exchanger be periodically “back flushed” to remove sediment.

5)Globe or Ball Valve (Recommended) - Used to aid in back flushing the heat exchanger and to isolate the DHW piping if it must be serviced. In addition, the upstream valve may be used to limit the DHW flow if necessary.

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Crown Boiler MWC Series, MWC116ENL, MWC116ELL, MWC116ENT, MWC116ELT manual Domestic Water Piping
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MWC116ENL, MWC116ELL, MWC116ELT, MWC116ENT, MWC Series specifications

Crown Boiler's MWC Series represents a commendable choice in the realm of residential and light commercial heating solutions. Specifically, models like the MWC116ENT, MWC116ELT, MWC116ELL, and MWC116ENL stand out due to their exceptional performance, reliability, and innovative features.

At the core of the MWC Series lies a robust cast iron boiler construction designed to withstand the test of time. This material not only provides durability but also enhances heat retention, thereby increasing the system's efficiency. Each model in this series is designed for natural gas or propane fuel types, ensuring flexibility based on availability and user preference.

A notable feature of the MWC116 models is the efficient heat exchanger, which enables rapid heating of water for both space heating and domestic hot water applications. With a heating capacity of 116,000 BTUs, these boilers deliver ample warmth for mid-sized homes or light commercial settings, making them a versatile option for various applications.

The MWC116ENT model is equipped with an energy-efficient electronic ignition system, which enhances reliability and efficiency. This technology reduces energy consumption, providing users with cost savings on their utility bills. Similarly, the MWC116ELT model boasts an integrated aquastat that regulates water temperature, ensuring optimal performance and comfort.

For those requiring increased venting options, the MWC116ELL model includes advanced horizontal venting capabilities, allowing for flexible installation in various environments. This feature aids in overcoming space limitations and facilitating optimal combustion conditions. The MWC116ENL, on the other hand, features a low NOx emissions configuration, making it an environmentally conscious choice for users concerned about their carbon footprint.

User-friendly controls are a characteristic hallmark of the MWC Series, enabling straightforward operation and easy adjustments. The boilers come equipped with a digital display that provides critical system information and diagnostics, streamlining maintenance efforts.

Overall, the Crown Boiler MWC Series, particularly models like the MWC116ENT, MWC116ELT, MWC116ELL, and MWC116ENL, offer an impressive blend of efficiency, flexibility, and advanced technology. These units are designed to meet contemporary heating demands while ensuring sustainable operation, making them a wise investment for comfort and performance in residential and light commercial applications alike. With reliable construction and innovative features, the MWC Series remains a top choice for those seeking effective heating solutions.
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