manufacturer’s instructions before operating the boiler.

7)Assembly of Heat Fab Saf-T Vent SC - On CWD Boiler installations where Saf-T Vent SC is used, some Saf-T Vent EZ Seal (single wall pipe) will always be required between the boiler and the Saf-T Vent SC. Install this pipe as described above. On all systems except vertical coaxial systems (Options 12, 13), the following Heat Fab adapters will be needed to adapt from Saf-T Vent EZ Seal to Saf-T Vent SC:

Vent Size

Heat Fab Part Number

3”

SC03ADEZ

4”

SC04ADEZ

On vertical coaxial vent systems employing Saf-T Vent SC, the transition from Saf-T Vent to Saf-T Vent SC is made with one of the following Air Intake Tees:

Vent Size

Heat Fab Part Number

3”

SC03TAD4

4”

SC04TAD4

Assemble the Saf-T Vent EZ Seal to the boiler and the adapter as described in (6) above. Proceed as follows to assemble the Saf-T Vent SC:

a)Clean both ends of the inner pipes to be joined with an alcohol pad. This will remove any foreign matter which may effect the integrity of the seal. Insert the male end of the first piece of pipe into the adaptor. In extremely dry conditions it may be helpful to moisten the gasket with clean water prior to assembly.

b)Push the first Saf-T Vent SC section into the adaptor until the outer jacket has made contact with the snap ring located inside the female end of the adaptor. When fully assembled the outer female end will overlap the male end by 1”.

c)Use the three self tapping screws provided with the vent to attach the first piece of pipe to the adapter. No pre drilling is required. If using a variable torque screw gun, use the low torque setting to install the screws so as not to strip out the holes. If a hole does become stripped due to over tightening, a larger (1/2” long max.) screw or short pop rivet may be used.

d)Seal all the joints in the outer jacket with foil tape or exterior grade silicone sealant.

e)Repeat steps (a - d) to assemble the remaining sections of Saf-T Vent SC.

f)Support the Saf-T Vent SC as called for in Heat Fab’s installation instructions. Also make sure that fire stops are provided as called for in Heat Fab’s instructions and local codes.

g)After the Saf-T Vent SC exits the building, one of the following adaptors will be needed to install the terminal:

Vent Size

Heat Fab Part Number

3”

5300CI

4”

5400CI

On vertical coaxial vent systems (Vent Options 12, 13) this adapter also acts as the combustion air intake terminal. In other installations, the openings in this adapter provide ventilation between the inner and outer walls.

FIGURE 22: FASNSEAL CONNECTION TO VENT COLLAR

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Crown Boiler CWD245, CWD083, CWD220, CWD060, CWD165, CWD138, CWD193, CWD110 Fasnseal Connection to Vent Collar

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.