Crown Boiler MWC116ELT, MWC Series, MWC116ENL, MWC116ELL, MWC116ENT XIV. Service and Maintenance

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XIV. Service and Maintenance

IMPORTANT

Warranty does not cover boiler damage or malfunction if the following steps are not performed at the intervals specified.

1)Continuously:

a)Keep the area around the boiler free from combustible materials, gasoline and other flammable vapors and liquids.

b)Keep the area around the combustion air inlet terminal free from contaminates .

c)Keep the boiler room ventilation openings open and unobstructed.

2)Monthly Inspections:

a)Inspect the vent system to verify that it is open, unobstructed and free from leakage or deterioration. Call the service technician to make repairs if needed.

b)Inspect the condensate drain system to verify it is leak tight, open and unobstructed. Call the service technician if the condensate drain system requires maintenance.

c)Inspect the water and gas lines to verify they are free from leaks. Call the service technician to make repairs if required.

d)Check the pressure on the boiler and make sure that it is approximately 15psi. If the pressure is less than 5psi, add water to bring the pressure up to 15psi.

CAUTION

Water leaks can cause severe corrosion damage to the boiler or other system components. Im- mediately repair any leaks found.

3)Annual Inspections and Service: In addition to the inspections listed above the following should be performed by a qualified service technician once every year:

a)Follow the procedure for turning the boiler off found in the MWC Series Lighting and Operating Instructions.

b)Inspect the wiring to verify the conductors are in good condition and attached securely.

c)Access the combustion chamber. To do this remove the front and side jacket panels as shown in Figure 11.1 Remove the inner cover as shown in Figure 12.5. Remove the Combustion Chamber cover as shown in Figure 14.1.

d)Inspect the fins on the primary heat exchanger. If any dirt is observed on the fins, cover the burner to protect it from falling debris and clean the heat exchanger with a soft brush.

CAUTION

Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.

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Contents MWC Series Page Table of Contents Product Description Key ComponentMWC Boiler Principle Components II Specifications RatingsMaximum Vent Lengths Other SpecificationsIII Before Installing Clearances To Combustible Or Non-combustible Material Mounting The Boiler Wall Mounting Hole Locations Boiler Mounting VI Air for Ventilation Page VII Venting Vent System DesignPage Horizontal Concentric Venting Vent Options 3a Crown Concentric 60/100 Vent Components Vent Options 1,2 3b Crown Concentric 80/125 Vent Components Vent Options 3,54c Positioning Vent Terminal Under Overhangs Vent/ Air Intake Fitting Equivalent Length Vertical Concentric Vent System Vent Option Removing an Existing Boiler From a Common Chimney All cuts are square and allow for proper insertion 21 Dimension L 22 Cutting Outer Pipe 25 Attaching 60/100mm Terminal Section 30 Installation Of 80/125 Adaptor On Boiler 31a Cuttable Straight Section 32 Cutting Straight Pipe 33a Joining Cuttable Pipe 34a Dimension L, 80/125mm Horizontal Terminal 34c Cutting Inner Pipe Of 80/125mm Horizontal Terminal 35a Dimension H 35b Cutting Vertical Terminal 36 Chimney Chase Installation Condensate Trap and Drain Line 40 Condensate Piping ArrangementViii Gas Piping Gas Connection To Boiler IX System Piping Standard PipingBasic Piping Relief Valve Installation Piping for Special Situations Internal Boiler PipingPrimary-Secondary Piping MWC116E*T Combi Internal Boiler-Side Piping Schematic MWC116E*L Heat-Only Internal Piping Schematic Domestic Water Piping DHW Piping MWC116E*T Combi Internal DHW-Side Piping Schematic XI Wiring Field Supplied Box End Boiler End Location of Terminal Blocks and 7/8 Hole for Whip Field Wiring 120VAC Thermostat Internal Boiler Wiring XII Start-up and Checkout Location of Automatic Air Vent CapLocation of Circulator Shaft Cover Control Panel Page Inner Cover Removal For Your Safety Read Before Operating MWC Series Lighting and Operating InstructionsHigh Fire Combustion Readings Xiii Operation DHWHeating System Knob Sequence of Operation Also Refer to Figures 9.7, 9.8, 10.3 See Part XV for Error Codes Flash Codes During Normal OperationXIV. Service and Maintenance Removing Combustion Chamber Cover Service Notes InducerCondensate Trap Removal XV. Troubleshooting No Error Code DisplayedError Codes Lamp Number Flame Meaning Corrective ActionFlow Chart for Isolating Limit and APS Errors See Table XVI Parts Flow group and three way diverter valve Model combi Flow and return groups Model c.h. only Pump and main circuit assembly Model combi Pump and main circuit assembly Model c.h. only Gas assembly Connection pipes Control panel and ignition device Model combi Control panel and ignition device Model c.h. only Wiring Model combi Wiring Model c.h. only Fan, combustion chamber and case panels Description Spare part code Description Spare part code Description Spare part code Installation of Carbon Monoxide Detectors Approved Carbon Monoxide Detectors 11/07

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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