Smith Cast Iron Boilers GT Series Sentry Controller, Locks-up, Display Goes Blank, Or pulsates

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GT INSTALLATION AND OPERATION INSTRUCTIONS

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Problem

Detected Problem

Solution

 

 

 

 

Sentry Controller

Excessive noise, current, or voltage spikes

Check for voltage at the wires going to the

Locks-up

in the 120V power supply.

A-C-T terminals of the Boiler.

 

 

 

Check the magnitude of the line voltage

 

 

power supply.

 

 

 

Check the Amp draw of output C1 and Ap

 

 

(max 3 Amp).

 

 

 

Check the Amp draw of control on start-up

 

 

(max 6 Amps)

 

 

 

Contact Smith.

 

 

 

 

Display Goes Blank

No power to control or control failure.

Check for 120V between terminals L1 and

 

 

L2 at Sentry.

 

 

 

If 120V exists turn power off and remove

 

 

line voltage harness from Sentry. Then

 

 

check for resistance between L1 and L2

 

 

of control, if the circuit is open (O.L) the

 

 

internal fuse has blown. Check for shorts

 

 

in wires leading to circulators prior to

 

 

replacing controller.

 

 

 

If 120V not present, check wiring and for

 

 

120V at source.

 

 

 

 

Boiler Lights rough

Typically an imbalance in the air to gas

Ensure that the venting lengths are in

or pulsates

ratio.

compliance with the venting sections

 

 

above.

 

 

 

Ensure that the line pressure during

 

 

operation does not drop more than 20%

 

 

from the static line pressure.

 

 

 

Momentarily remove the intake vent from

 

 

the boiler during ignition, if unit lights

 

 

smoothly with intake vent disconnected

 

 

reconnect and check for proper

 

 

 

combustion if unit maintains smooth

 

 

operation after ignition. Calibrate for

 

 

proper combustion. If problem persists

 

 

contact Smith.

 

 

 

 

 

Fan appears to be

Slight vibration can cause noise in the

Use flexible gas line to insolate the

 

creating a noise in

residence. This is not a warranty issue.

vibration noises between the gas valve

the housing

 

and the line.

 

 

 

Don’t hang gas lines from floor joists.

 

 

Use rubber insulators with gas line

 

 

 

supports.

 

 

 

 

 

Making a rubbing noise. This is not a

If gas valve is not held when the gas

 

warranty issue.

nipple is connected, the force of tightening

 

 

the fitting can damage the valve, and warp

 

 

the fan housing.

 

 

 

If pipe is used, the gas line must not

 

 

create any forces to the valve, either

 

 

vertically (weight of line), or horizontally

 

 

(misaligned connection)

 

 

 

 

 

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Contents North ELM Street WESTFIELD, MA 01085 TEL 562-9631 FAX 413 Gama Energy StarContents Before YOU StartBoiler 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 Equivalent Pipe Length Chart GAS Supply PipingGas 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 TemperaturesDetermining Reset Temperature HICalc = 200F, 93C 70F, 21C /70F, 21C=140.6 F, 42C Boiler SET UP Operating InstructionsNormal 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.
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