Crown Boiler BWC070, BWC120, BWC090 installation manual VII Venting

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VII Venting

WARNING

FAILURE TO VENT THIS BOILER IN ACCORDANCE WITH THESE INSTRUCTIONS COULD CAUSE FLUE GAS TO ENTER THE BUILDING RESULTING IN SEVERE PROPERTY DAMAGE, PERSONAL INJURY, OR DEATH:

*Do not attempt to vent this boiler with galvanized, PVC, or any other vent components not listed in Table 7.4. * Do not attempt to mix components from different approved vent systems.

*Do not obtain combustion air from within the building.

*Do not install a barometric damper or drafthood on this boiler.

CAUTION

Moisture and ice may form on the surfaces around the vent termination. To prevent deterioration, surfaces should be in good repair (sealed, painted, etc.).

A. Vent System Design

There are four basic ways to vent this boiler:

•Horizontal (“Side Wall”) Concentric Venting - Vent system exits the building through an outside wall. Concentric venting consists of a “pipe within a pipe”. Flue gas exits the building through the inner pipe and combustion air is drawn into the boiler through the space between the inner and outer pipe.

•Horizontal (“Side Wall”) Twin Pipe Venting - Vent system exits the building through an outside wall. Combustion air and flue gas are routed between the boiler and outdoors using separate pipes.

•Vertical Concentric Venting - Vent system exits the building through the roof. Concentric venting consists of a “pipe within a pipe”. Flue gas exits the building through the inner pipe and combustion air is drawn into the boiler through the space between the inner and outer pipe.

•Vertical Twin Pipe Venting - Vent system exits the building through a roof. Combustion air and flue gas are routed between the boiler and outdoors using separate pipes.

All of these systems are considered “direct vent” because in all of them air for combustion is drawn directly from the outdoors into the boiler. A description of all of these venting options are shown in Tables 7.1 and 7.9. For clarity, these vent options are numbered from 1 to 6. One of the vent option columns in Tables 7.1 or 7.9 must match the planned vent and air intake system exactly. In addition, observe the following guidelines:

1)Approved vent systems - Use only one of the approved vent systems shown in Tables 7.4 or 7.5. These vent systems fall into two basic categories:

•Concentric Vent System - The standard boiler is supplied with a concentric vent system having a maximum usable length of 25” (Figure 1.1). For longer runs, additional straight lengths and elbows are available from Crown. In some cases, larger diameter concentric pipe must be used. Each Crown concentric vent component consists of an inner pipe of polypropylene and the outer pipe of steel. Integral gaskets on each concentric fitting provide a gas tight seal. A list of all Crown concentric vent components is shown in Table 7.4.

In this manual, concentric pipe sizes are called out in terms of the inner and outer pipe nominal diameters in millimeters. For example, “60/100mm” pipe consists of a 60mm exhaust pipe inside a 100mm diameter outer pipe.

•Twin Pipe Vent Systems - Approved vent systems are made of a special stainless steel alloy (AL29-4C) for protection against corrosive flue gas condensate. They are designed to provide a gas tight seal at all joints and seams so that flue gas does not enter the building. Each approved vent system has a unique method for installation - do not attempt to mix components from different vent systems. A list of approved twin pipe vent systems is shown in Table 7.5. Note that a special vent collar (Crown PN 230510) is required if the boiler is to be vented with one of the approved stainless vent systems.

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Contents Page VII Venting Page Summary of Horizontal Venting Options Horizontal Concentric Venting Vent Option 1,3 Vent Option Manufacturer Vent Size Component Part Number 6c Positioning Vent Terminal Under Overhangs Snorkel Terminal Configuration VENT/ AIR Intake Fitting Equivalent Length 10 Vertical Twin Pipe Vent System Vent Option Removing an Existing Boiler From a Common Chimney Page 21 Dimension L 22 Cutting Outer Pipe 25 Attaching 60/100mm Terminal Section 30a Cuttable Straight Section 31 Cutting Straight Pipe 32a Joining Cuttable Pipe 33a Dimension L, 80/125mm Horizontal Terminal 33c Cutting Inner Pipe of 80/125mm Horizontal Terminal 34 Installation of Snorkel Terminal 35a Dimension H 35b Cutting Vertical Terminal 36 Chimney Chase Installation Assembly of Stainless Steel Venting 47 CORR/GUARD Connection to Vent Collar

BWC120, BWC070, BWC090 specifications

Crown Boiler Company has established itself as a leader in the heating industry, providing reliable and efficient solutions for residential and commercial applications. Among their innovative product line, the BWC series, which includes the BWC120, BWC070, and BWC090 models, showcases advanced technology and design features that cater to the diverse needs of consumers.

The BWC series is designed to deliver exceptional heating performance while being user-friendly and efficient. One of the main features of these models is their compact design, making them suitable for installations in tight spaces, such as basements and utility rooms. This space-saving advantage does not compromise their power or heating capacity, as each model is engineered to handle a variety of heating demands.

A prominent technology in the BWC series is the high-efficiency, modulating condensing design. This allows the boilers to adjust their output based on the heating requirements of the space, leading to significant energy savings. By utilizing a variable-speed blower and an integrated control system, these boilers can operate at lower heating outputs when the demand is lower, ultimately improving overall efficiency and reducing fuel costs.

The BWC120, with an output of 120 MBH, is ideal for larger homes or light commercial applications, providing robust heating capabilities. The BWC090 offers a slightly lower output at 90 MBH, catering to moderately sized homes. Meanwhile, the BWC070 targets smaller residential settings with an output of 70 MBH, ensuring that there is a fitting option for a variety of heating needs.

In addition to their efficiency and compact design, the BWC models are equipped with advanced safety features, including built-in temperature and pressure relief valves. These safety measures give homeowners peace of mind, knowing that their heating system is operating safely and reliably.

Durability is another characteristic that defines the BWC series. Constructed with high-quality materials and designed to withstand the rigors of everyday use, these boilers are built to last. The easy-to-service construction ensures that routine maintenance is straightforward, thereby enhancing longevity and reliability.

In summary, the Crown Boiler BWC120, BWC070, and BWC090 models combine efficiency, advanced technology, and safety features, making them an excellent choice for anyone in the market for dependable heating solutions. Their adaptability to various heating needs, along with their space-saving designs, makes them suitable for a wide range of applications, ensuring comfort and reliability for years to come.
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