XI Wiring

WARNING

All wiring and grounding must be done in accordance with the authority having jurisdiction or, in the absence of such requirements, with the National Electrical Code (ANSI/NFPA 70), and / or, the Canadian Electrical Code Part I ,CSA C22.1,Electrical Code.

1)All electrical connections are line voltage (120 VAC) and are located under the cover on the cover on the top of the control box (Fig 11.1). To access these connections, use the following procedure:

a)Remove the three screws on the top of the front jacket panel and lift off the panel.

b)There are three screws in the bottom of each side jacket panel: two near the front and one near the back. Remove the two screws near the front and loosen the screw near the back.

c)Spread the side jacket panels apart slightly, slide the control box forward and then rotate the control box down as shown in Figure 11.1.

d)Remove the cover shown in Figure 11.1 to access the electrical connections.

2)Crown supplies the “Whip” shown in Figure 11.2 to route the power and thermostat wiring from an installer supplied junction box into the boiler’s control box. This Whip is designed to provide proper strain relief at the boiler and also permits the control box to be easily slid in and out of the boiler with all wiring connections intact. A 7/8 hole is located in the metal rail behind the control box as shown in Figure 11.3. Power and thermostat wiring is routed into the boiler from underneath (Figure 11.5) and the BX connector on the “boiler end” of the Whip is secured in this 7/8” opening.

3)Route the whip leads into the electrical connection compartment. DO NOT CUT THE WHIP LEADS ON THE BOILER END.

4)Two terminal blocks are located in the electrical connection compartment: one for power connections and one for the thermostat connections. Figure 11.3 shows the location of these terminal blocks in the connection compartment.

5)Connect the whip leads to the terminals as shown in Figure 11.4:

Whip Color

To Factory Wire Color

Description

Black

Brown

120VAC “Hot”

White

Blue

120 VAC Neutral

Green

Green/Yellow

Ground

Orange (either)

Blue

120VAC Thermostat

Orange (either)

Red

120VAC Thermostat

Important: Remove the factory installed jumper from the thermostat terminals (Figure 10.4)

6)Reinstall the compartment cover removed in Step #1d.

7)Figure 11.5 shows connections at the junction box end of the whip. Provide a dedicated circuit for the boiler with at least one emergency shut-off switch located in accordance with applicable codes. The thermostat connections provided are 120VAC. If a thermostat is directly connected to these leads, it and all intervening wiring, must be suitable for use with 120VAC power. If it is desired to control the boiler with a low voltage thermostat, or other low voltage control system, use a fan center to do so as shown in Figure 11.6

WARNING

Attempting to directly connect a low voltage thermostat and/or low voltage wiring to the orange thermostat leads could cause property damage and/or create hazard of fire or electricutuion.

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Crown Boiler MWC116ENT, MWC Series, MWC116ENL, MWC116ELL, MWC116ELT manual XI Wiring
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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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