Smith Cast Iron Boilers GT Series manual Gas Valve Layout, GT-150, Ignition System

Page 30

Page 30

GT INSTALLATION AND OPERATION INSTRUCTIONS

The gas supply pressure to the boiler while running at maximum rate must be between 4 to 9 in, 102 to 229 mm, W.C. for natural gas installations; 9 to 12 in, 229 to 305 mm, W.C. for propane installations. This pressure can be measured on the gas valve using a manometer, Figure 41 or 42. Ensure that the regulator is capable of maintaining this pressure under all operating conditions. The gas valve is also equipped with a manifold pressure port, Figure 41 or 42.

Figure 41 - Gas Valve Layout, GT-150 & 200

Figure 42 - Gas Valve Layout, GT-400

Manifold Pressure

Line Pressure

Input Screw

Ignition System

A.Connect a manometer to the line pressure port shown in Figure 41 or 42. 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. Wait at least five minutes for any gas to dissipate before turning on the electrical power.

B.Read, understand and follow the operating instructions below.

C.Raise the thermostat at least 5 degrees above the room temperature. The boiler should enter the pre- purge mode before energizing the silicon carbide igniter. Once the igniter is hot, the main gas valve will open and the burner should light. If the burner fails to light the system will make three more ignition attempts. If the burner has 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. Once the problem has been resolved and 5 minutes have passed since the last ignition attempt, reset the system by turning the thermostat to it’s lowest setting and then back to where it was or by momentarily interrupting the electrical power to the boiler.

D.With the burner in operation close the manual shutoff valve in the gas supply line. As soon as the burner fl ame goes out, open the manual shutoff valve. A normal ignition sequence should take place.

E.With the burner in operation, interrupt the power to the control circuit by lowering and raising the thermostat. A normal ignition sequence should follow.

F.To test the ignition safety shutoff device, close the manual shutoff valve in the gas supply line. Within 6 seconds of main burner fl ame extinction, the main gas valve solenoid should close with an audible noise. The igniter should glow and make three attempts at ignition. After unsuccessfully attempting to light the burner the ignition module should lock out.

Page 29 Page 31
Image 30
Page 29 Page 31
Contents Gama Energy Star North ELM Street WESTFIELD, MA 01085 TEL 562-9631 FAX 413Contents Before YOU StartBoiler Ratings & Capacities Boiler Location Input vs Elevation GraphCombustion AIR General Venting GuidelinesHorizontal Direct Vent Systems Separate Air Intake and Vent Terminals Horizontal Terminal LocationsWall Penetration Detail External Air Intake and Vent Systems Debris Screen Installation Vertical Direct Vent SystemsCondensate Drain Concentric Through the RoofGeneral Plumbing Guidelines Pressure Relief Valve Relief Valve PipingSecondary Loop Plumbing Multiple Boiler Primary LoopPrimary Loop Plumbing Low Water Cut Off, LwcoSingle Boiler with Indirect Hot Water Heater Multiple Boiler Installation Multiple Zones Using Circulators Multiple Zones Valves with Bypass Valve Equivalent Pipe Length Chart GAS Supply PipingGas Pipe Capacity Electrical Wiring Thermostat InstallationMultiple Zones w/ Taco Valve Controller Models ZVC403 to ZVC Multiple 4 Wire Zone Valves GT Installation and Operation Instructions GT Installation and Operation Instructions Boiler Ladder Diagram Boiler Connection Diagram Indirect Water Heaters Sentry 2100T ControllerBoiler Modulation Sentry DisplayRecommend System Temperatures Setting Sentry 2100T controlRecommended Settings Outdoor Sensor 10KDetermining Reset Temperature HICalc = 200F, 93C 70F, 21C /70F, 21C=140.6 F, 42C Boiler SET UP Operating InstructionsNormal Flue Gas Composition Natural Gas Propane Gas Valve Layout, GT-150 Ignition SystemOperational Flow Chart For Your Safety Read Before Operating Input Rate Boiler Checking & AdjustmentGas Pressure Adjustment Main Burner FlameBoiler Maintenance Wall Hung Conversion Aquastat High LimitBurner shuts off Trouble ShootingTemperature is Before set-pointIndicates that Air Switch is OpenAir Switch is Closed Ignition SequenceThree Flashes on Two Flashes onFenwal Boiler will not stayWarranty issue Creating a noise Residence. This is not a warranty issueHousing Sentry ControllerGT Installation and Operation Instructions Replacement Parts List Replacement Parts Exploded View Models GT150 and GT200Replacement Parts Exploded View Model GT400 GT Installation and Operation Instructions WESTCAST, INC

GT Series specifications

Smith Cast Iron Boilers GT Series has become a benchmark in the hydronic heating industry, renowned for its exceptional performance, durability, and efficiency. This series is designed to cater to diverse heating needs, making it a popular choice among both residential and commercial applications.

One of the standout features of the GT Series is its robust cast iron construction. The cast iron sections offer superior thermal mass, allowing for better heat retention and distribution. This characteristic ensures that the boiler operates efficiently, maintaining comfortable temperatures even during extreme cold weather conditions. The engineers at Smith have meticulously designed each section to provide maximum strength and longevity, resulting in a boiler that can withstand the test of time.

The GT Series also incorporates advanced combustion technology. It utilizes a high-efficiency burner that optimizes fuel consumption, resulting in lower operating costs for homeowners and businesses alike. The boiler is engineered to accommodate a variety of fuel types, including natural gas and propane, giving users flexibility in their energy choices. This adaptability not only enhances efficiency but also promotes environmental sustainability by allowing for the use of cleaner fuel sources.

Another notable technology featured in the GT Series is the electronic control system. This system simplifies boiler operation and enhances user convenience. The intuitive interface provides real-time feedback and diagnostics, making it easier for technicians to perform maintenance and troubleshoot any issues that may arise. Additionally, the boiler’s modulating operation adjusts the burner output according to the heating demand, further improving efficiency and comfort.

Moreover, the GT Series is designed with user-friendly installation in mind. Its compact footprint allows for easy integration into existing heating systems, minimizing space requirements. Additionally, the boiler is equipped with convenient access points for maintenance, ensuring that servicing is straightforward and can be performed without extensive downtime.

Lastly, the Smith Cast Iron Boilers GT Series is designed to meet stringent safety and performance standards. Featuring multiple safety controls and systems, it provides peace of mind for users. With a commitment to quality, efficiency, and performance, the GT Series stands out as a leading solution for hydronic heating, catering to the evolving needs of today’s energy-conscious consumers.
Top Page Image Contents