Crown Boiler CWD083, CWD220, CWD060, CWD165, CWD138, CWD193, CWD245, CWD110 Service Notes

Page 56

16)Set the flue collector onto the block and press down so that the flue collector is set into the silicone applied in the previous step.

17)Slide the flue collector lugs back into position and retighten the ¼-20 bolts. DO NOT OVER TIGHTEN.

18)Apply a bead of silicone around the outside of the joint between the heat exchanger and the flue collector.

19)Reattach all the jacket components.

20)Reconnect the pressure switch tubes (see Figure 46 for correct tubing orientation).

21)Reconnect the fan.

22)Reconnect the vent system.

23)Reinstall the burner tray.

Service Notes

1) Orifice Size – Sea level orifice sizes are:

Natural Gas – #50 Drill Size

LP Gas – Consult Factory

Consult your Crown representative for correct orifice sizes for use at altitudes above 2000 ft. Orifice for this boiler cannot be drilled in the field.

2)Operating the Boiler with Intake Cover Removed – For inspection and troubleshooting purposes, this boiler may be started and run with the intake cover removed. When this is done, a resonance (“hum”) may be observed. This is normal and should disappear as soon as the intake cover is replaced.

WARNING

Do not leave the boiler in service with the intake cover removed.

3)Pressure Switch – This boiler is equipped with a differential pressure switch which makes when there is adequate flue gas flow through the boiler. This switch measures the pressure drop across an orifice plate inside the flue collector - the higher the flue gas flow through this plate, the higher the pressure drop. The N.O. contacts on the pressure switch make, allowing the boiler to fire, when the pressure drop across the flue collector orifice plate switch exceeds the “make setting” shown in Table 7. Once the switch is made, the boiler will fire as long as the pressure at the switch is above the “break setting” shown in Table 7. The pressure at both pressure switch tappings is actually below atmospheric (“negative”) with the pressure at the upper flue collector tap being the more negative of the two pressures. Figure 46a shows the pressure switch connections.

Figure 46b shows the correct method of reading the pressure across the pressure switch tappings. It is normal for the pressure reading across the switch to drop as the boiler heats up.

4)Burner and Pilot Removal - If necessary, the pilot can be removed without removing the burner tray. To do so, remove the screws holding the main burners on each side of the pilot bracket. The main burners will then be loose enough to allow the pilot hood to slip between them.

Main burners cannot be removed without removing the burner tray from the boiler.

54

Page 55 Page 57
Image 56
Page 55 Page 57
Contents CWD Series Table of Contents Product Description II SpecificationsIII Before Installing IV Locating the BoilerClearances When Combustion AIR is Obtained from Boiler Room Air for Combustion and Ventilation Clearances from Vent Piping to Combustible ConstructionPage 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 VI Venting Vent System DesignSummary 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 AIR Intake Fitting Removing an Existing Boiler From a Common ChimneyVent Fitting Horizontal Terminal Offsets Positioning Vent Terminal Under Overhangs Vent / Intake System Assembly USE of Condensate TrapsFAN 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 VII Gas Piping GAS Connection to BoilerViii System Piping Standard PipingPiping for Special Situations Basic Piping Bypass Piping Chiller Piping IX Wiring CB502 System Single Zone WiringCB502 Control System Single Zone Field Wiring CB502 System Wiring Variations CB502 Control System Sequence of OperationCB502 Control System Field Wiring for TWO Circulator Zones CB502 Control System Internal Ladder Diagram CB502 Control System Internal Connection Diagram R8285 Control System Sequence of Operation R8285 Control System Single Zone WiringR8285 Control System Wiring Variations 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.
Top Page Image Contents