Smith Cast Iron Boilers GT Series manual Operational Flow Chart

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GT INSTALLATION AND OPERATION INSTRUCTIONS

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Figure 43 - Operational Flow Chart

 

120v Power

 

Displays version

 

Boiler in

 

 

Applied

 

t2.0 or t4.0

 

standby Mode

 

 

 

 

 

Indirect thermostat or flow

Thermostat End switch

 

 

 

 

switch closes A-C

 

or relay closes T-C

Energizes 3 way

Combi model

Combi or

 

(Call for Domestic)

Awaiting

(Call for Heat)

diverter valve

 

indirect

 

 

 

Input

 

 

Indirect

 

 

 

 

Energizes Primary

Energizes Primary

Water

Energizes Indirect Pump

 

 

Heater

(Ap) turns off C1

 

 

Pump (C1)

Pump (C1)

 

 

 

 

 

 

 

 

 

 

 

 

 

Air

 

 

 

Error

 

 

Closed

Switches

 

Sentry 2100

(Call for Ignition)

ASC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Open

 

 

Sentry 2100

 

 

 

 

 

Sentry 2100

 

24 Volt signal

 

 

 

 

 

 

 

 

 

 

 

to blower

 

 

 

 

 

24 V

 

 

 

 

 

 

Sentry 2100

Manifold & Stack Limit

 

 

 

 

 

Fan to SFS (75)

 

 

 

 

Open

(GT 150 & GT 200)

 

 

 

 

 

 

 

Open

 

Closed

 

 

 

Manifold Limit & Flow

 

NC

 

 

NO

 

 

Switch

 

Hi pressure

Closed

 

 

 

 

(GT 400)

Error

N. C. switch on

 

 

 

 

 

 

GT 400 only

 

 

 

 

 

 

ASO

 

 

 

 

 

 

24 V

 

 

 

 

 

 

 

 

 

Power to ignitor

Prepurge

 

IGNITION MODULE

 

 

 

 

 

 

 

 

120v from S1

 

 

S1 L1 L2 S2 W MV GND

 

 

Igniter warm-up

 

 

 

 

 

 

 

 

 

 

 

 

 

5 seconds

 

 

 

 

 

Three retries

 

 

 

 

 

 

 

 

 

 

 

 

 

 

for flame

Power to Gas valve

Flame Probe

Sentry 2100

Modulates fan based

upon setpoint and

programming

Signal <1 microA

Less than 1.0 microA

Greater than 1.0 microA

Call for flame ends

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Contents North ELM Street WESTFIELD, MA 01085 TEL 562-9631 FAX 413 Gama Energy StarBefore YOU Start ContentsBoiler Ratings & Capacities Input vs Elevation Graph Boiler LocationGeneral Venting Guidelines Combustion AIRHorizontal Direct Vent Systems Horizontal Terminal Locations Separate Air Intake and Vent TerminalsWall Penetration Detail External Air Intake and Vent Systems Vertical Direct Vent Systems Debris Screen InstallationConcentric Through the Roof Condensate DrainGeneral Plumbing Guidelines Relief Valve Piping Pressure Relief ValveLow Water Cut Off, Lwco Multiple Boiler Primary LoopPrimary Loop Plumbing Secondary Loop PlumbingSingle Boiler with Indirect Hot Water Heater Multiple Boiler Installation Multiple Zones Using Circulators Multiple Zones Valves with Bypass Valve GAS Supply Piping Equivalent Pipe Length ChartGas Pipe Capacity Thermostat Installation Electrical WiringMultiple 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 Sentry Display Sentry 2100T ControllerBoiler Modulation Indirect Water HeatersOutdoor Sensor 10K Setting Sentry 2100T controlRecommended Settings Recommend System Temperatures= 200F, 93C 70F, 21C /70F, 21C Determining Reset Temperature HICalc=140.6 F, 42C Operating Instructions Boiler SET UPNormal Flue Gas Composition Natural Gas Propane Ignition System Gas Valve Layout, GT-150Operational Flow Chart For Your Safety Read Before Operating Main Burner Flame Boiler Checking & AdjustmentGas Pressure Adjustment Input RateBoiler Maintenance Aquastat High Limit Wall Hung ConversionBefore set-point Trouble ShootingTemperature is Burner shuts offIgnition Sequence Air Switch is OpenAir Switch is Closed Indicates thatBoiler will not stay Two Flashes onFenwal Three Flashes onSentry Controller Creating a noise Residence. This is not a warranty issueHousing Warranty issueGT Installation and Operation Instructions Replacement Parts Exploded View Models GT150 and GT200 Replacement Parts ListReplacement 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.