Smith Cast Iron Boilers GB300 Boiler Maintenance, Input Rate, Low Water Cutoff, Burner Removal

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GB300 BOILER INSTALLATION AND OPERATION INSTRUCTIONS

1.Attach a 20" manometer to the tap on the manifold.

2.Remove the regulator adjustment screw cap from the gas regulator. On systems that do not use a separate gas regulator, remove the adjustment screw cap from the gas valve body on the valve closest to the gas supply piping.

3.Rotate the regulator adjustment screw clockwise to increase the manifold pressure, counterclockwise to decrease it.

4.Replace the regulator adjustment screw cap and pressure tap plug.

CAUTION: Never force the regulator adjustment screw beyond the stop limits or damage to the regulator will occur!

PROPANE GAS: A manifold pressure of 10" WC must be maintained for proper operation of the boiler. If the manifold pressure is off by more than 5% adjust it according to steps 1 through 4 above.

Input Rate

Gas appliances are rated based on sea level operation with no adjustment required at elevations up to 2000 feet. At elevations above 2000 feet, input ratings should be reduced by 4% for each 1000 feet above sea level.

Check the input rate as follows:

1.Turn off all other gas appliances that use the same gas meter as the boiler.

2.Call your gas supplier and ask for the heating value of the gas.

3.Start the boiler and let it run for 15 minutes.

4.Using the gas meter and a stop watch, clock the time that it takes to burn 10 cubic foot of gas and divide this time by 10.

5.Insert the heating value and the time, in seconds, into the formula below.

Input = (heating value, Btu/hr)(3600)/(time, seconds)

If the computed rate deviates by more than 5% from the rated input value of the unit adjust the manifold pressure accordingly.

NOTE:The Honeywell VR8404 valve is factory set and can-not be field adjusted

DO NOT adjust the manifold pressure by more than 5%. If a proper rate cannot be maintained without adjusting the manifold pressure beyond the 5% limit, the main burner orifices must be replaced. If the input rate is too low, go to the next lager size main burner orifices. If the input rate is too high, go to the next smaller size.

CAUTION: Never increase the input to the boiler above that for which it is rated. Doing so can cause premature failure of the boiler!

Low Water Cutoff

Ensure that the low water cutoff device(s) function properly. Test in accordance with the manufacturer’s instructions included with the device(s).

Thermostat Adjustment

For a thermostat that employs an adjustable heat anticipator, adjust the anticipator to match the current measured in the thermostat circuit. An increased anticipator setting may be necessary if the unit cycles frequently. If the room temperature over-shoots the thermostat setting, reduce the anticipator setting.

BOILER MAINTENANCE

CAUTION: Servicing, inspection and adjustment must be done by a trained technician in accordance with all applicable local and national codes. Improper servicing or adjustment can damage the boiler!

The boiler should be cleaned and inspected once a year, before each heating season. Make sure that the burners and ignition components are free from dust, soot, dirt, corrosion or other deposits that would impair the boiler’s performance.

Burner Removal

1.Close the manual shutoff valves in the gas supply lines and turn off electrical power to the boiler.

2.Remove the front grill(s).

3.Lift the rear of the burner up and slide it towards the back of the boiler. When the orifice bracket is clear of the orifice lower the burner and remove it by sliding it forward and out from the boiler.

4.Inspect each burner for damage or signs of deterioration. Use a brush or compressed air to remove any debris from the burner ports.

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Contents Natural or Propane GAS Boiler Before YOU Start ContentsQUE Faire SI Vous Sentez UNE Odeur DE GAZ Concrete Block Base Construction Boiler Ratings & CapacitiesBoiler Location Combustion AIR & Ventilation All Air From Inside The BuildingAll Air From Outside The Building 500Chimney & Vent Pipe Connections Vent ConnectionsChimney Inspection & Sizing Vent Outlet, Equivalent Breeching & Chimney SizeCommon Vent Systems Ansi Dual Flue Outlets And Inside Air GB300 Series Common Vents And Inside Air GB300 Series Horizontal Venting And Inside Air GB300 CAP 1/4 IN. PER Foot 20MM/M of RUN toBoiler Assembly Burner Base Assembly General InstructionsX1 Box 72700 to Burner Base BoxRefractory Retension Bracket Burner Base Assembly 5 through 12 SectionsBurner Base Side Panels, 5 X7 Box Base Rear Channel Plumbing Base Manifold AttachmentsFront base splice channel, Figure Burner Base Splice Panel Bracket Burner Base Splice Insulation BoardsCeramic Blanket Adhesive Application Ceramic Blanket InstallationCast Iron Section Assembly Trimming Ceramic Rope Rear View Odd Numbered Models Front View Even Numbered ModelsUpper Port Seal Placement Flue Collector Box 63203 to Draw Rod Torquing 30 ft/lbs, 42 NmCast Iron Pressure Test Bolt InstallationFlue Collector Bracket Installation Flue Collector Installation Ceramic Blanket Placement 5-12 SectDraft Hood Attachment 13 to 21 Sections Clean Out Covers Clean Out Cover InsulationMANIFOLD, Burner and Pilot Installation Figure Manifold InstallationsFollow all applicable local codes Burner Tube Through Rear Base PanelJacket Installation Rear Jacket Bracket AttachmentFigures Remove the left and right jacket side panels from Box Rear Top Jacket Panel, 5 through Figures 80 Front Top Jacket Panel, 5 throughSplice Panel Brackets Front Access Panel 5 12 Sect Grill AssemblySplice Grill Assembly Front Access Panel 13 21 SectPilot Assembly Gas Train AssembliesHeating System Piping Water Boiler Piping ConnectionsSteam Boiler Piping Connections Boiler Model Supply Size Return SizePiping For Use With Cooling Units Water Boilers in Battery Typical Steam Piping Gravity Return for Multiple Boilers Equivalent Pipe Length Chart GAS Supply PipingBoiler Model Risers Equalizer Header Gas Pipe CapacityElectrical Wiring Electrical Power ConnectionsGas Supply Piping Transformer LocationWire Duct and Control Box Thermostat InstallationBoiler Operation Water BoilersIntermittent Pilot Ignition Systems Lighting InstructionsContinuous Pilot Systems Boiler Checking & Adjustment Pilot Adjustment Pilot Flame AdjustmentGas Pressure Adjustment To Turn Off Gas To BoilerBoiler Maintenance Thermostat AdjustmentInput Rate Low Water CutoffBurner Installation Heat Exchanger CleaningVent System ControlsGB300 Boiler Installation and Operation Instructions Ref # Name of Part 63251 Intermittent Pilot Ignition Controls Water Controls & Trim Page WESTCAST, INC North ELM Street WESTFIELD, MA

GB300 specifications

The Smith Cast Iron Boilers GB300 series is renowned for its robust construction and exceptional performance, making it a preferred choice for commercial and industrial applications. This line of boilers is designed to provide reliable and efficient heating solutions for a variety of facilities, including schools, hospitals, and manufacturing plants.

One of the standout features of the GB300 series is its durable cast iron construction. Built to withstand the demands of heavy-duty operation, the cast iron material ensures longevity and resilience against thermal cycling stresses. This design not only enhances the boiler's lifespan but also ensures that it maintains optimal performance over time, even in rigorous conditions.

The GB300 series is equipped with advanced technologies that contribute to its efficiency and ease of use. For instance, the boilers incorporate a flexible firing system that allows for a range of firing rates. This adaptability ensures that the boiler can efficiently meet varying heating loads. Additionally, the use of a multi-pass heat exchanger design maximizes heat transfer, significantly improving overall efficiency and reducing fuel consumption.

Another key characteristic of the GB300 boilers is the user-friendly control system. The integrated control panel provides operators with real-time monitoring and management capabilities, allowing for precise adjustment of temperature and pressure settings. This feature not only enhances operational efficiency but also aids in maintaining safety standards.

The GB300 series also emphasizes safety, featuring multiple levels of protection, including low water cut-off, high-pressure switches, and safety valves. These safety mechanisms ensure reliable operation and minimize the risk of operational hazards, providing peace of mind for operators and facility managers.

Versatility is another remarkable attribute of the Smith Cast Iron Boilers GB300 series. These boilers can be used in various configurations, whether as a standalone unit or as part of a more extensive heating system. This flexibility makes the GB300 series suitable for diverse applications and facility sizes.

In summary, the Smith Cast Iron Boilers GB300 series is a powerful heating solution that combines durability, efficiency, and advanced technology. Its robust cast iron construction, flexible firing capabilities, and comprehensive safety features make it an ideal choice for those seeking reliable heating systems in demanding environments. The GB300 series stands out as a testament to Smith's commitment to quality and innovation in the boiler industry.
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