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Crown Boiler 61, Table 13.4: Flash Codes During Normal Operation (See Part XV for Error Codes)

Models: MWC Series MWC116ELL MWC116ELT MWC116ENL MWC116ENT

1 88

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Lamp Number

1 2 3

Meaning

(Short pulse every 4 seconds): H eat i ng System Knob in

“Off” position. Boiler will not res po nd to call for heat or

DHW. Frost protection and pu m p/ v alv e exercise function

still active

(1 second pulse every 2 seco nds): Heating System Knob

set to target supply temperature. Boiler will respond to a

call for heat.

Boiler responding to a call fo r heat

Boiler responding to a call fo r DHW

Boiler responding to a call fo r frost protection

Lamp OFF Lamp ON Flashing la mp, al one

or simultaneously

with another lamp.

Flashing lamp,

alternate with

another lamp

Table 13.4: Flash Codes During Normal Operation(See Part XV for Error Codes)

Contents

Main Models: MWC116ENT MWC116ELT MWC116ENL MWC116ELL L MWC Series Mid Efciency Gas-Fired Hot Water Direct Vent Condensing Boilers InStallatIon InStruCtIonS D E S I G N E D T O L Page Table of Contents I Product Description Page 4 Table 2.2: Ratings See Vent Section for additional venting options and requirements Table 2.3: Maximum Vent Lengths II Speci cations Figure 2.1: General Con guration Table 2.4: Other Speci cations 5 III Before Installing IV Locating the Boiler NOTICE Page V Mounting The Boiler Page Page VI Air for Ventilation Page 12 VII Venting A. Vent System Design Page 14 Table 7.1: Summary Of Horizontal Venting Options Figure 7.2: Horizontal Concentric Venting (Vent Options 1-3) 15 Table 7.3a: Crown Concentric 60/100 Vent Components (Vent Options 1,2) Table 7.3b: Crown Concentric 80/125 Vent Components (Vent Options 3,5) Page 17 table 7.5: Vent/ air Intake Fitting Equivalent length table 7.6: Summary of Vertical Venting options Page 19 B. Removing an Existing Boiler From a Common Chimney 20 Page Page Page Page Page 26 Figure 7.32: Cutting Straight Pipe Page Page Page 30 Figure 7.35a: Dimension H Page Page Page 34 VIII Gas Piping Figure 8.1: Gas Tailpiece Installation Page 36 IX System Piping A. Standard Piping DANGER Page Page Page Page Page Page X. Domestic Water Piping Page Page XI Wiring Page Page Page 50 ~ Figure 11.7: Internal Boiler Wiring XII Start-up and Checkout Auto Air Vent Cap 52 Shaft Screw Cover Figure 12.2: Location of Circulator Shaft Cover 53 Figure 12.3: Control Panel Figure 12.4: Main Burner Flame Page Page 56 MWC Series Lighting and Operating Instructions WARNING FOR YOUR SAFETY READ BEFORE OPERATING OPERATING INSTRUCTIONS TO TURN OFF GAS TO APPLIANCE 57 Table 12.8: High Fire Combustion Readings 58 XIII Operation Figure 13.1: Control Panel Page 60 (Also Refer to Figures 9.7, 9.8, 10.3, 11.7) 61 Table 13.4: Flash Codes During Normal Operation (See Part XV for Error Codes) XIV. Service and Maintenance 63 Figure 14.1: Removing Combustion Chamber Cover Neg. Pressure Tap Venturi Page 66 XV. Troubleshooting Turn off power to boiler before replacing fuses or working on wiring. Fuse Figure 15.2: Fuse Location Line Voltage Connections 67 Table 15.3: Error Codes 68 Figure 15.4 Flow Chart for Isolating Limit and APS Errors (See Table 15.3) N YN Y NN YY XVI Parts C.h. return group and d.h.w. heat exchanger (Model combi) C.h. flow group and three way diverter valve (Model combi) * Includes items 23, 28, 29, 30, 31, 32, 20, 36 C.h. flow and return groups (Model c.h. only) * Includes items 20, 28, 29, 30, 31, 32, 36 Pump and main circuit assembly (Model combi) Pump and main circuit assembly (Model c.h. only) Gas assembly Connection pipes * Not for model c.h. only 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