Shaft Screw Cover

Figure 12.2: Location of Circulator Shaft Cover

WARNING

•Never use a flame to check for gas leaks.

•Make sure that the area around the boiler is clear and free from combustible materials, gasoline and other flammable vapors and liquids

CAUTION

Leaks in the hydronic system can result in the addition of excessive amounts of make- up water. This can cause severe damage to the boiler’s heat exchanger from corrosion or calcium deposits. Repair any leaks in the system immediately.

3)Check all new water and gas piping for leaks and purge piping sections that are filled with air. Fix any

leaks found immediately. See the National Fuel Gas Code, ANSI Z223.1./NFPA 54 and/or CAN/CSA B 149.1 Natural Gas and Propane Installation Code, for additional information on testing and purging gas lines.

4)Vent system must be complete and free of obstructions before attempting to fire boiler.

5)Inspect all line voltage wiring for loose or uninsulated connections.

6)Start the boiler using the lighting instructions on page 56. After the power to the boiler is turned on:

a)Initiate a call for heat from the thermostat. Once this is done, Lamp 1 on the control panel (Figure 12.3) should flash every 4 seconds.

b)Rotate the Heating System Knob clockwise from “0” to the maximum supply water temperature setting (at approximately 5:00) . Lamp 1 should then flash every two seconds and the boiler should light after approximately 15 - 30 seconds. Once the boiler has lit, Lamps 1 and 3 will flash continuously.

More information on the boiler controls and indicator lamps is presented in the Operation Section of this manual. Note: On a new installation, there is a good chance that one of the following two problems will occur:

•The differential water pressure switch may not close. If this switch does not close after 180 seconds, the boiler will lockout. Lamp #2 will stay on continuously and Lamp #1 will flash. If this happens, look for air in the system or insufficient pressure drop across the boiler supply and return connections.

If the latter problem is suspected, close the throttle valve on the supply further. If no throttling valve is present, make sure that the flow restrictor is installed (See Part IX). To reset the boiler, turn the Heating System Knob to “0” for a few seconds and then return it to the max water temperature setting.

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Crown Boiler MWC116ELT, MWC Series, MWC116ENL, MWC116ELL, MWC116ENT manual Location of Circulator Shaft Cover
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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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