Crown Boiler CWD193, CWD083 Removing an Existing Boiler From a Common Chimney, Vent Fitting

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12)Vertical and horizontal sections of piping must be properly supported. See vent system manufacturer’s instructions for more information.

13)Non-coaxial vent piping must be accessible for periodic inspection.

14)Fire stops and wall thimbles – Use fire stops where required by code or by the vent system manufacturer. Consult vent system manufacturer’s literature for information on suitable fire stops.

15)Supports - Vertical and horizontal sections of vent pipe must be properly supported. See the Vent System assembly section of this manual for more information.

B. Removing an Existing Boiler From a Common Chimney

Read this only if the CWD boiler is replacing an existing boiler that is being removed from a common chimney. This section does not apply to the installation of a CWD boiler.

In some cases, when an existing boiler is removed from a common chimney, the common venting system may be too large for the remaining appliances. At the time of removal of an existing boiler, the following steps shall be followed with each appliance remaining connected to the common venting system placed in operation, while the other appliances remaining connected to the common venting system are not in operation.

(a)Seal any unused openings in the common venting system.

(b)Visually inspect the venting system for proper size and horizontal pitch and determine there is no blockage or restriction, leakage, corrosion and other deficiencies which could cause an unsafe condition.

(c)Insofar as practical, close all building doors and windows and all doors between the space in which all the appliances remaining connected to the common venting system are located and other spaces of the building. Turn on clothes dryers and any appliance not connected to the common venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace dampers.

(d)Place in operation the appliance being inspected. Follow the lighting instructions. Adjust thermostat so the appliance will operate continuously.

(e)Test for spillage at the draft hood relief opening after 5 minutes of main burner operation. Use the flame of a match or candle, or smoke from a cigarette, cigar, or pipe.

(f)After it has been determined that each appliance remaining connected to the common venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas-burning appliances to their previous condition of use.

(g)Any improper operation of the common venting system should be corrected so the installation conforms with the National Fuel Gas Code, ANSI Z223.1. When resizing any portion of the common venting system, the common venting system should be resized to approach the minimum size as determined using the appropriate tables in Part 11 of the National Fuel Gas Code, ANSI Z223.1.

WARNING

NEVER COMMON VENT A CWD BOILER WITH OTHER APPLIANCES

TABLE 5a: VENT FITTING

EQUIVALENT LENGTH

VENT FITTING

EQUIVALENT

 

LENGTH (ft)

3” 90 ELBOW

5.5

3” 45 ELBOW

4.0

 

 

HEAT FAB SC03E90

5.5

(3” COAXIAL 90 ELBOW)

 

HEAT FAB SC03E45

4.0

(3” COAXIAL 45 ELBOW)

 

4” 90 ELBOW

8.0

 

 

4” 45 ELBOW

4.5

 

 

HEAT FAB SC04E90

8.0

(4” COAXIAL 90 ELBOW)

 

 

 

HEAT FAB SC04E45

4.5

(4” COAXIAL 45 ELBOW

 

 

 

TABLE 5b: AIR INTAKE FITTING

EQUIVALENT LENGTH

INTAKE FITTING

EQUIVALENT

 

LENGTH (ft)

4” 90 ELBOW

8.0

4” 45 ELBOW

4.5

 

 

HEAT FAB SC03E90

 

(3” COAXIAL 90 ELBOW)

 

HEAT FAB SC03E45

 

(3” COAXIAL 45 ELBOW)

CONSULT CROWN

HEAT FAB SC04E90

 

(4” COAXIAL 90 ELBOW)

 

 

 

HEAT FAB SC04E45

 

(4” COAXIAL 45 ELBOW)

 

 

 

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Contents CWD Series Table of Contents II Specifications Product DescriptionIV Locating the Boiler III Before InstallingClearances When Combustion AIR is Obtained from Boiler Room Clearances from Vent Piping to Combustible Construction Air for Combustion and VentilationPage If Indoor Combustion Air is Used, Provide Air as Follows ALL AIR from Outside Using Ventilated Crawl Space and Attic ALL AIR from Outside Using Openings Into Boiler Room Vent System Design VI VentingSummary of Horizontal Venting Options Page Horizontal Direct Exhaust Vent System Vent Options 4,5 Page Summary of Vertical Venting Options Vertical NON-COAXIAL Direct Vent System Vent Options 6 Summary of Vertical Coaxial Venting Options Page Permissible Vent Systems and Principle Vent Components Removing an Existing Boiler From a Common Chimney Vent FittingAIR Intake Fitting Horizontal Terminal Offsets Positioning Vent Terminal Under Overhangs USE of Condensate Traps Vent / Intake System AssemblyFAN Outlet Orifice Crown Coaxial Terminal Exploded View CORR/GUARD Connection to Vent Collar Vent III Connection to Vent Collar SAF-T Vent Ezseal Connection to Vent Collar Fasnseal Connection to Vent Collar FSA-SWDW3 Page Condensate TRAP/DRAIN Detail GAS Connection to Boiler VII Gas PipingStandard Piping Viii System PipingPiping for Special Situations Basic Piping Bypass Piping Chiller Piping CB502 System Single Zone Wiring IX WiringCB502 Control System Single Zone Field Wiring CB502 Control System Sequence of Operation CB502 System Wiring VariationsCB502 Control System Field Wiring for TWO Circulator Zones CB502 Control System Internal Ladder Diagram CB502 Control System Internal Connection Diagram R8285 Control System Single Zone Wiring R8285 Control System Wiring VariationsR8285 Control System Sequence of Operation R8285 Control System Single Zone Field Wiring R8285 Control System Zone Valve Field Wiring R8285 Control System Internal Connection Diagram Start-up and Checkout For Your Safety Read Before Operating Pilot Burner Flame GAS Valve XI Service and Maintenance Heat Exchanger Cleaning Procedure Service Notes Pressure Switch Settings Measuring Pressure Across Pressure Switch XII Troubleshooting PWR DHW Limit 24V GND on ign. module? Thermostat calls for heat Circulator Pilot Main Start Xiii Parts BLOCK, BASE, Flue Collector Components Page Burner Tray Components Page Jacket Components Page Common Controls & Trim Page Page Page Crown

CWD193, CWD165, CWD245, CWD220, CWD110 specifications

Crown Boiler Company is well-known for its commitment to quality and performance in the heating industry. Among its extensive range of products, the Crown Boiler CWD series stands out for its reliability and efficiency. This series includes models CWD060, CWD083, CWD110, CWD138, and CWD220, each designed to meet diverse heating needs in residential and commercial applications.

One of the main features of the CWD series is its durable construction. Made with high-quality materials, these boilers are built to withstand the test of time. The cast iron heat exchanger delivers exceptional heat retention and efficiency, ensuring optimal performance even in demanding conditions. Additionally, the CWD models are equipped with a reliable standing pilot ignition system, which enhances user safety and operational reliability.

Another important characteristic of the Crown CWD series is its versatility in fuel options. These boilers can operate on either natural gas or propane, providing flexibility to homeowners and businesses depending on their preferred energy source. The ability to easily switch fuels makes these units adaptable to various heating applications, maximizing convenience for users.

Efficiency is a cornerstone of the Crown Boiler CWD series. With an AFUE rating of up to 85%, these boilers deliver substantial cost savings over the heating season. Their efficient operation not only lowers energy bills but also contributes to a reduced environmental impact, which is increasingly important in today’s energy-conscious world.

Crown’s innovative design features also include a low water cut-off and a built-in draft hood. The low water cut-off ensures safe operation by preventing the boiler from running dry, while the draft hood allows for optimal venting capabilities, minimizing the risk of dangerous flue gas build-up.

Maintenance is straightforward with the CWD series, thanks to its easy-access design. Routine service and inspections can be performed with minimal disruption, ensuring that the units maintain peak performance over their lifespan.

The Crown Boiler CWD060, CWD083, CWD110, CWD138, and CWD220 models exemplify the brand’s dedication to delivering high-quality heating solutions. With their impressive efficiency ratings, durable construction, versatile fuel options, and user-friendly features, these boilers represent a smart investment for anyone looking to enhance heating reliability and comfort in their space.
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