Crown Boiler MWC Series, MWC116ENL, MWC116ELL, MWC116ENT, MWC116ELT manual Xiii Operation, Dhw

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XIII Operation

Lamp 1

DHW

Heating System Knob

 

 

Flame Reset Button

Lamp 2

Thermostat

Lamp 3

(Combi Only)

Flame Lockout Lamp

 

 

 

Figure 13.1: Control Panel

Figure 13.1 shows the control panel for the MWC boiler. The purpose of the adjustments and lamps on this panel are as follows:

1)Lamps 1, 2, 3 - These lamps show the status of the boiler by lighting and/or flashing in various combinations. Table 13.4 shows lamp codes that will be seen during normal operation. Lamp codes indicating a problem are shown in Section XV.

2)Heating System Knob - A detail of the heating system knob is shown in Figure 13.2. This knob has three discrete settings:

•Off - Boiler will not respond to a call for heat or domestic hot water (DHW). The boiler will fire, if necessary, to protect itself from freezing. In addition, it will operate the circulator and the 3-way valve for a few seconds every 24 hours to prevent these devices from sticking.

The “Off” setting is also used to reset the boiler after it experiences a lockout. To reset the boiler, rotate the Heating System Knob to “Off” for a few seconds and then return it to its original position (if the lockout is due to a loss of flame, it will ALSO be necessary push the Flame Reset Button).

•Summer Operation (Combi Only) - Boiler will not respond to a call for heat from the heating thermostat, but will respond to a call for DHW.

•Target Supply Temperature Setting - When the Heating System Knob is rotated clockwise to any position from “Off” the boiler will respond to a call for heat. During the call for heat, the boiler will attempt to maintain a “target” supply temperature. This target supply temperature can bet set anywhere between 100F and 178F (Figure 13.2) .

3)DHW Thermostat (Combi Boilers Only) - This knob determines the target domestic hot water (DHW) temperature. It is adjustable from 95F to 131F (Figure 13.3). If a call for heat is present at the same time as a call for DHW, the call for DHW has priority; no heat will be delivered to the heating system until the call for DHW is satisfied.

4)Flame Reset Button - This button is used to reset the boiler in the event that it locks out due to failure to establish a flame. In addition to pressing this button, it is also necessary to rotate the Heating System Knob back to “0” for a few seconds to reset the boiler.

5)Flame Lockout Lamp - Illuminates if the boiler locks out due to failure to establish a flame.

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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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