Crown Boiler MWC116ELT, MWC Series, MWC116ENL, MWC116ELL manual Product Description, Key Component

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I Product Description

The MWC Series are gas ﬁred condensing boilers designed for use in forced hot water heating systems requiring supply water temperatures of 176F or less and return water temperatures greater than 86F. The primary heat exchanger is a copper water tube design. Additional heat is extracted from the ﬂue gas in a stainless steel secondary heat exchanger located down stream of the inducer. These boilers include a built in circulator, expansion tank, and automatic air vent. In addition, “combi” models include a plate exchanger for domestic hot water (DHW) generation. All MWC Series boilers are designed for installation on a wall and may be vented vertically or horizontally with combustion air supplied from outdoors.

Key	Component
1	Primary Heat Exchanger
2	Secondary Heat Exchanger
3	Inducer
4	Burner
5	Electrodes and Flame Rod
6	Circulator
7	Automatic Air Vent
8	Condensate Trap
9	Control Box
10	Differential Boiler Water Pressure Switch
11	Ignition module/Gas Valve
12	Air Pressure Switch
13	Flue Gas Temperature Limit
14	Supply Temperature Limit
*	Expansion Tank
*	Plate Heat Exchanger (Combi Only)
*	3-Way Diverting Valve (Combi Only)
*	Supply Temperature Sensor
*	DHW Temperature Sensor (Combi Only)
*	DHW Flow Switch (Combi Only)

* Not visible

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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