National Products Series B, BW3 instruction manual Procedure 2ÐMINIMUM Vent Pipe Clearance, Ð8Ð

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TO SYSTEM

B

C

D

WATER

CHILLER

A

VALVES C & D CLOSE FOR HEATING; OPEN FOR COOLING

VALVES A & B

OPEN FOR HEATING;

CLOSE FOR COOLING

A96141

Fig. 4ÐPiping Arrangements for Boiler Used in Connection with Refrigeration System

2.The boiler's induced draft blower has a 3-in. outlet. A 3-in. X 4-in. increaser fitting is included in the parts bag. Locate increaser fitting on outlet of induced draft blower and secure gastight with a bead of the factory-supplied silicone sealant. The increaser fitting is required on this boiler for Category I venting, and 4 in. is the minimum permissible vent diameter. This does NOT imply that the vent connector is intended to be 4-in. diameter pipe. The vent connector shall be sized according to the appropriate NFGC venting tables in the U.S.A. or the NSCNGPIC in Canada, and may be required to be larger than 4-in. diameter.

NOTE: The boiler installation for chimney venting is not complete unless the 3-in. X 4-in. increaser fitting is located and secured.

3.These are energy-efficient boilers with a low stack or exhaust temperature.

4.If venting into masonry chimney without a liner, line chimney from top to bottom with either:

a.listed Type-B vent pipe

b.listed flexible vent liner

c.poured ceramic liner

5.Outside chimneys should not be used unless they are either:

a.enclosed in a chase

b.lined with Type-B vent pipe, listed flexible vent liner, or other certified chimney lining system

6.The vent connector from boiler to chimney should run as directly as possible with as few elbows as possible.

7.Where possible, it is recommended to common vent water heater and boiler. Consult the appropriate Vent Sizing Tables in either the NFGC or NSCNGPIC for specific requirements of multiple appliance venting.

8.If boiler is the only appliance connected to vent, Type-B vent pipe is recommended for vent connector.

9.Slope pipe up from boiler to chimney not less than 1/4 in. per ft.

10.End of vent pipe must be flush with inside face of chimney flue. Use a sealed-in thimble for chimney connection.

11.The sections of vent pipe should be fastened with at least 3 sheet metal screws to make piping rigid. Use stovepipe wires to support pipe from above.

12.Do not connect to fireplace flue.

13.Do not install a damper on this boiler.

PROCEDURE 2ÐMINIMUM VENT PIPE CLEARANCE

If vent pipe must go through a crawlspace, Type-B vent pipe should be used. Where vent pipe passes through a combustible wall or partition, use a ventilated metal thimble. The thimble should be 4 in. larger in diameter than vent pipe.

If boiler is installed with single-wall vent, it must have a 6-in. clearance between its surface and any combustible material.

A new Type-B gas vent or flexible liner must be installed in accordance with instructions furnished with vent. Maintain clearances as specified for vent pipe.

Check vent pipe to see if it is firestopped where it goes through floor or ceiling. It should have an approved vent cap with clearances from roof shown in Fig. 5. If clearances are less than shown in Fig. 5, have vent checked by local authorities.

Ð8Ð

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Contents Installation, Start-Up, and Operating Instructions IndexSafety Considerations Ð2ÐPage Ð4Ð Gas-Fired Hot Water Boilers→ Locating the Boiler Procedure 1ÐBOILER Located in Unconfined Space → ÐRoom Large In Comparison With Boiler→FRESH AIR for Combustion Ð5ÐProcedure 2ÐBOILER Located in Confined Space AÐFresh Air Duct Capacities for Vertical Ducts BtuhBÐFresh Air Duct Capacities for Horizontal Ducts Btuh Ð6ÐInstallationðsystem Piping Procedure 1ÐFOR USE with Cooling UnitsProcedure 2ÐLOW Design Water Temperature Systems below 140F Procedure 1ÐCHECKING ChimneyProcedure 2ÐMINIMUM Vent Pipe Clearance Ð8ÐÐBoiler and Power Venter Optional Horizontal Venting with Power VenterPower Venter KIT Ð9ÐGAS Supply Piping Procedure 1ÐCHECKING GAS Supply Procedure 2ÐCONNECTING GAS PipingÐGas Pipe Sizes Ð10ÐProcedure 3ÐCHECKING GAS Piping Electrical WiringProcedure 1ÐELECTRIC Power Supply Procedure 2ÐINSTALLING ThermostatÐUnit Wiring Diagram Ð12ÐProcedure 8ÐWATER Temperature Control Equipment and Optional Accessories Procedure 1ÐRELIEF ValveProcedure 7ÐDRAIN Valve Procedure 9ÐCIRCULATING Pump Procedure 10ÐBLOWER Draft InducerProcedure 11ÐPRESSURE Switch Procedure 12ÐROLLOUT Switch Flame Rollout Safety ShutoffGAS Valve Operating Instructions To Turn On Gas To ApplianceTo Turn Off Gas To Appliance Ð15ÐProcedure 2ÐPILOT Burner Adjustment Procedure 3ÐMAIN BurnersProcedure 4ÐLIMIT Controls Adjustment Procedure 5ÐTHERMOSTAT Heat Anticipator AdjustmentMaintaining Boiler Procedure 1ÐBURNERS Procedure 2ÐRELIEF ValveProcedure 3ÐEXPANSION Tank Procedure 4ÐBOILER Flue PassagesProcedure 8ÐBLOWER Service HintsÐ18Ð If System is not Heating or not Giving Enough Heat→ for USE with Natural GAS only Natural Gas Burners and Manifold PartsÐ19Ð KEY DescriptionÐ20Ð → for USE with Propane GAS onlyPropane Gas Burners and Manifold Parts Ð21Ð KEYBoiler Controls and Piping Ð22ÐService Training Ð23ÐÐ24Ð

BW3, Series B specifications

National Products Series B and BW3 are pioneering additions to the realm of mobile workstation solutions, designed specifically for professionals who operate in fast-paced environments. These rugged and versatile products cater to a variety of sectors, including law enforcement, emergency response, and field service, ensuring that users remain efficient and organized while on the move.

The Series B is notable for its robust construction, built to withstand the rigors of constant use in challenging conditions. With a lightweight yet durable design, it combines portability with the resilience necessary for demanding applications. This series excels in adaptability, featuring multiple mounting options that can accommodate various devices, including laptops, tablets, and even larger screens. The flexibility to adjust the mount for optimal user comfort makes it suitable for long hours of operation.

One of the standout features of the Series B is its innovative Quick Release technology. This allows users to swiftly secure or detach devices with minimal effort, essential for those who need to move quickly between vehicles or locations. Additionally, the series is equipped with an array of cable management solutions, keeping workspaces organized and clutter-free—an essential consideration for professionals who rely on multiple devices.

The BW3 series takes mobility a step further by emphasizing a balance between form and function. With a streamlined design, the BW3 is as aesthetically pleasing as it is practical. Its integrated power management system features built-in charging ports, enabling users to keep their devices powered throughout the day. This aspect is particularly beneficial for professionals who rely on GPS, communication tools, and other electronic devices in the field.

Both the Series B and BW3 incorporate advanced materials that enhance their durability. These innovations include weather-resistant coatings and anti-corrosive finishes, guaranteeing longevity and reliability even under adverse conditions.

In summary, the National Products Series B and BW3 are finely crafted mobile workstation solutions that seamlessly integrate technology and functionality. Their key features—including Quick Release mounts, extensive device compatibility, and robust construction—make them indispensable tools for demanding professionals. By prioritizing user comfort and efficiency, these products elevate the standards of mobile work environments, empowering users to excel in their respective fields.
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