Crown Boiler BWC Series Viii System Piping, General System Piping Precautions, System Design

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VIII System Piping

A. General System Piping Precautions

CAUTION

THE HEAT EXCHANGER USED IN THE BWC IS MADE FROM A SPECIAL ALUMINUM ALLOY. FAILURE TO TAKE THE FOLLOWING PRECAUTIONS COULD RESULT IN SEVERE BOILER DAMAGE.

•INSTALL BOILER SO THAT THE GAS IGNITION SYSTEM COMPONENTS ARE PROTECTED FROM WATER (DRIPPING, SPRAYING, RAIN, ETC) DURING APPLIANCE OPERATION AND SERVICE (CIRCULATOR REPLACEMENT, ETC).

•OPERATION OF THIS BOILER IN A SYSTEM CONTAINING SIGNIFICANT AMOUNTS OF DISSOLVED OXYGEN CAN CAUSE SEVERE HEAT EXCHANGER CORROSION DAMAGE.

•USE ONLY ANTIFREEZE SPECIFICALLY PERMITTED ON PAGE 37 OF THIS MANUAL.

•MAKE SURE THAT THE WATER USED TO FILL THE SYSTEM MEETS THE REQUIREMENTS OUTLINED IN THE START-UP AND CHECKOUT SECTION OF THIS MANUAL (PAGE 37).

•NEVER USE PETROLEUM BASED CLEANING OR SEALING COMPOUNDS IN THE BOILER SYSTEM. THESE PRODUCTS COULD DAMAGE ELASTOMER SEALS AND GASKETS IN THE SYSTEM AND COULD RESULT IN PROPERTY DAMAGE.

•THIS BOILER IS NOT DESIGNED FOR USE IN SYSTEMS CONTAINING SIGNIFICANT AMOUNTS OF MAKEUP WATER. REGULAR ADDITIONS OF MAKEUP WATER MAY CAUSE SEVERE HEAT EXCHANGER DAMAGE.

•BEFORE CONNECTING BOILER, MAKE SURE THAT THE SYSTEM IS FREE OF SEDIMENT, FLUX AND ANY RESIDUAL BOILER WATER ADDITIVES. FLUSH THE SYSTEM IF NECESSARY TO ENSURE THAT THESE CONTAMINATES ARE REMOVED.

•MAINTAIN THE PRESSURE IN THE BOILER AT A MINIMUM OF 12 PSI.

•DESIGN SYSTEM TO ENSURE THAT THE FLOW FALLS WITHIN THE LIMITS CALLED FOR IN TABLE 8.1.

B. System Design

Proper operation of the BWC boiler requires that the water flow through the boiler remain within the limits shown in Table 8.1 any time the burner is firing. Failure to maintain the flow within these limits could result in erratic operation or premature boiler failure. There are three basic methods that can be used to pipe the BWC boiler. The instructions on the following pages describe three alternative methods for piping BWC boilers and explain how to size the circulator and piping for each one. Additional information on hydronic system design may be found in Installation of Residential Hydronic Systems (Pub. #200) published by the Hydronics Institute in Berkeley Heights, NJ.

TABLE 8.1: FLOW REQUIREMENTS THROUGH BOILER

BOILER MODEL

MIN. REQUIRED FLOW

MAX. ALLOWABLE

(GPM)

FLOW (GPM)

 

 

 

 

 

 

 

BWC150

8

15

BWC225

9

23

 

 

 

 

 

 

21

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Contents BWC Series Page VII II Specifications Product DescriptionIV Locating the Boiler III Before InstallingMinimum Clearance To Combustible Material Air for Ventilation Page Vent System Design VI VentingHorizontal Direct Venting Vent Options 1,2 2a Summary of Horizontal Venting Options 3c Positioning Vent Terminal Under Overhangs Vertical Direct Vent System Vent Options 6 2b Summary of Vertical Venting Options VENT/ AIR Intake Fitting Equivalent Length Removing an Existing Boiler From a Common Chimney Vent / Intake System Assembly7a STAR-34 Connection to Vent Collar Z-VENT III Connection to Vent Collar SAF-T Vent Ezseal Connection to Vent Collar 10 Fasnseal Connection to Vent Collar 11 Condensate Piping Arrangement Gas Connection To Boiler VII Gas PipingSystem Design General System Piping PrecautionsViii System Piping Method 1 Primary/Secondary Piping Boiler in Secondary Loop Piping Method #1 Heat Only 4a Piping Method #1 Secondary Loop Piping Shaded Pipe and Circulator Sizing for Boiler Loop Fitting Equivalent Lengths Method 2 Primary/Secondary Piping Boiler in Primary Loop Piping Method #2 Heat Only 10a Piping Method #2 Secondary Loop Piping Bolded Page Flow GPM Piping for Special Situations 14 Chiller Piping IX Wiring Wiring Connections Diagram Ladder Diagram Page Start-up and Checkout BWC Series Lighting and Operating Instructions For Your Safety Read Before LightingBWC Burner Typical CO2/O2 Combustion Readings Gas Valve DetailPage XI Operation Normal Display In Standby ModePage 170 First Digit Boiler Status Boiler StatusOutdoor Reset Curve Continuously XII. Service and MaintenancePage No Error Code Displayed XIII. TroubleshootingCode Condition Possible Causes Soft Lockout Codes DisplayedHard Lockout Codes Displayed XIV Parts BWC Replacement Parts List TBD Page Page Page Page Ignition Electrode Gasket, 5mm 240011 Page BWC Replacement Parts List Page Page Page Page Page PN 980040 BWC 08/05

BWC Series specifications

The Crown Boiler BWC Series is a modern choice for heating needs, renowned for its efficiency and robust design. This series offers a range of residential and light commercial heating applicabilities, ensuring both comfort and reliability for users.

One of the standout features of the BWC Series is its efficiency. Crown Boilers utilize advanced technologies to maximize energy output while minimizing fuel consumption. With an AFUE (Annual Fuel Utilization Efficiency) rating often exceeding 90%, users can expect significant cost savings on their energy bills over time.

The BWC Series employs a high-quality, stainless steel heat exchanger, which not only enhances performance but also extends the lifespan of the boiler. This heat exchanger is designed to transfer heat efficiently, ensuring that the maximum amount of energy from the fuel is converted into usable heat. Additionally, the design helps to prevent corrosion and maintain system integrity over years of usage.

For technological advancements, the BWC Series incorporates a modulating gas valve which allows for precise control over the boiler's operation. This feature enables the system to adjust its output based on the heating demands of the home, resulting in improved energy efficiency and consistent comfort levels. Moreover, this modulating technology reduces the frequency of cycling, thereby prolonging the lifespan of the unit and minimizing wear and tear.

Another characteristic of the Crown Boiler BWC Series is its user-friendly interface. The boiler is equipped with a simple control panel that allows for easy monitoring and adjustment of settings. This accessibility is essential for users who want to manage their heating system without the need for extensive technical knowledge.

In terms of installation and maintenance, the BWC Series is designed with convenience in mind. Its compact footprint allows it to fit comfortably in a variety of spaces, making it an ideal choice for homes with limited installation areas. Additionally, Crown Boiler's commitment to high manufacturing standards ensures that the units require minimal maintenance, providing peace of mind to homeowners.

Overall, the Crown Boiler BWC Series is an excellent solution for those seeking efficient, reliable heating. Its combination of advanced technology, quality construction, and user-friendly design makes it an attractive option for any residential or light commercial application. Whether replacing an old system or installing a new one, the BWC Series delivers comfort and performance that can be depended upon.
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