Smith Cast Iron Boilers GB300 warranty Boiler Checking & Adjustment Pilot Adjustment

Page 43

Page 43

GB300 BOILER INSTALLATION AND OPERATION INSTRUCTIONS

6.Remove the front grill(s).

7.Connect a manometer having a minimum capacity of 20" WC to the outlet pressure port of the gas valve. Make sure that the gas supply piping has been purged of air and that all gas joints up to the gas valve have been thoroughly checked for leaks.

To Turn Off Gas To Boiler

1.Set the operating control to its lowest setting.

2.Turn off all electric power to the appliance if service is to be performed.

3.Close the manual main and pilot gas shut-off valves.

8.Open the petcock pilot valve.

9.Turn on all electric power to the boiler.

10.Set the operating control to the desired setting.

11.The pilot(s) should automatically light. Do not try to light the pilot(s) by hand!

12.With the pilot(s) lit, open the main gas shut-off valve.

13.The burners should light with proper boiler operation.

14.A boiler designed for use with natural gas should have a manifold gas pressure of approximately 3.5" WC on high fire and 0.8" WC on low fire. For an LP boiler, the manifold pressure should be 10" WC. To adjust the manifold gas pressure see the GAS PRESSURE ADJUSTMENT instructions in the BOILER CHECKING AND ADJUSTMENT section.

15.With the burners in operation, close the manual shutoff valve in the gas supply line. As soon as the main burner flames go out, open the manual shutoff valve. A normal ignition sequence should take place. If the burners fail to light the system will make two more ignition attempts. If the burners have not lit after the last ignition try, the gas valve will close and the system will go into lock out. DO NOT attempt to reset the system until the ignition system has been inspected and the problem resolved.

With the burners in operation, interrupt the power to the control circuit by lowering the operating control.The main burners should go out. Reset the operating control, a normal ignition sequence should follow.

To test the ignition safety shutoff device, close the manual shutoff valve in the gas supply line. Within 6 seconds of main burner flame extinction, the main gas valve solenoid should close with an audible noise.

A sparking noise should be heard while the ignition module tries to light the pilot. After 1 minute the module should lockout and the try for ignition end. Open the manual shutoff valve in the gas supply line and reset the ignition control system. A normal ignition sequence should take place.

BOILER CHECKING & ADJUSTMENT PILOT ADJUSTMENT

The pilot burner flame should envelope 3/8" to 1/2" of the thermocouple tip or flame-sensing probe, depending on the pilot type. Figure 103 depicts an intermittent pilot, but the adjustment dimensions for a continuous pilot would be the same. To adjust the pilot the following steps must be taken:

1.Remove the cap next to the pilot tube fitting on the gas valve or on the separate pilot gas regulator where one is used.

2.Turn the pilot adjustment screw on the valve counterclockwise to increase the flame, clockwise to decrease it. On the separate pilot gas regulator turn the regulator screw clockwise to increase the flame, counterclockwise to decrease it.

3.Replace the pilot adjustment screw cap.

Figure 103

Pilot Flame Adjustment

SCREWS

BRASS FERULE

1/4" TUBING

Gas Pressure Adjustment

NATURAL GAS: Optimum results are obtained when the boiler is operated at its full input rating, with 3.3" WC to 3.7" WC and 1.0" to 0.8" on low fire of manifold pressure.The manifold pressure should not vary outside this range. The gas valve pressure regulator has been preset at the factory. If adjustment is necessary the following steps must be followed:

NOTE: The Honeywell VR8404 valve is factory set and cannot be field adjusted

Page 42 Page 44
Image 43
Page 42 Page 44
Contents Natural or Propane GAS Boiler QUE Faire SI Vous Sentez UNE Odeur DE GAZ ContentsBefore YOU Start Boiler Location Boiler Ratings & CapacitiesConcrete Block Base Construction 500 Combustion AIR & VentilationAll Air From Inside The Building All Air From Outside The BuildingVent Outlet, Equivalent Breeching & Chimney Size Chimney & Vent Pipe ConnectionsVent Connections Chimney Inspection & SizingCommon Vent Systems Ansi Dual Flue Outlets And Inside Air GB300 Series Common Vents And Inside Air GB300 Series CAP 1/4 IN. PER Foot 20MM/M of RUN to Horizontal Venting And Inside Air GB300Burner Base Box Boiler AssemblyBurner Base Assembly General Instructions X1 Box 72700 toBurner Base Side Panels, 5 Burner Base Assembly 5 through 12 SectionsRefractory Retension Bracket X7 Box Base Rear Channel Front base splice channel, Figure Manifold AttachmentsPlumbing Base Burner Base Splice Insulation Boards Burner Base Splice Panel BracketCast Iron Section Assembly Ceramic Blanket InstallationCeramic Blanket Adhesive Application Trimming Ceramic Rope Front View Even Numbered Models Rear View Odd Numbered ModelsUpper Port Seal Placement Draw Rod Torquing 30 ft/lbs, 42 Nm Flue Collector Box 63203 toFlue Collector Bracket Installation Bolt InstallationCast Iron Pressure Test Ceramic Blanket Placement 5-12 Sect Flue Collector InstallationDraft Hood Attachment 13 to 21 Sections Clean Out Cover Insulation Clean Out CoversManifold Installations MANIFOLD, Burner and Pilot Installation FigureBurner Tube Through Rear Base Panel Follow all applicable local codesRear Jacket Bracket Attachment Jacket InstallationFigures Remove the left and right jacket side panels from Box Figures 80 Front Top Jacket Panel, 5 through Rear Top Jacket Panel, 5 throughSplice Panel Brackets Front Access Panel 13 21 Sect Front Access Panel 5 12 SectGrill Assembly Splice Grill AssemblyGas Train Assemblies Pilot AssemblyWater Boiler Piping Connections Heating System PipingPiping For Use With Cooling Units Boiler Model Supply Size Return SizeSteam Boiler Piping Connections Water Boilers in Battery Typical Steam Piping Gravity Return for Multiple Boilers Gas Pipe Capacity Equivalent Pipe Length ChartGAS Supply Piping Boiler Model Risers Equalizer HeaderTransformer Location Electrical WiringElectrical Power Connections Gas Supply PipingWater Boilers Wire Duct and Control BoxThermostat Installation Boiler OperationContinuous Pilot Systems Lighting InstructionsIntermittent Pilot Ignition Systems To Turn Off Gas To Boiler Boiler Checking & Adjustment Pilot AdjustmentPilot Flame Adjustment Gas Pressure AdjustmentLow Water Cutoff Boiler MaintenanceThermostat Adjustment Input RateControls Burner InstallationHeat Exchanger Cleaning Vent SystemGB300 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.
Top Page Image Contents