Page 38GT INSTALLATION AND OPERATION INSTRUCTIONS

Problem

Detected Problem

Solution

 

 

 

Ignition Sequence

Stack Safety Limit Trips (Automatic Reset)

This device protects the integrity of the

not activated when

Located on the front of the flue box.

plastic venting material.

burner light is on

 

If the temperature of the flue gases

(Fan is on and

 

exceeds 225°F, 107°C, the limit will cut

Fenwal not flashing)

 

power to the control. Blocked internal

continued

 

tubes can increase the stack temperature

 

 

to an unacceptable level. Flush out the

 

 

boiler.

 

 

 

Two Flashes on

The Fenwal controller thinks that there is a

If the combustion sequence is normal,

Fenwal

flame prior to ignition.

and there is no flame prior to ignition, the

 

 

Fenwal control is defective, and must be

 

 

replaced.

 

 

 

Three Flashes on

Indicates Ignition Lockout.

If the condensate drain gets blocked,

Fenwal

 

the boiler will become flooded, and

 

 

terminate operation, as the flame rod

 

 

becomes immersed. This will damage

 

 

the flame probe. To correct, free the drain

 

 

blockage, and permanently prevent it from

 

 

reoccurring. Remove and dry off the probe.

 

 

Reinstall the probe and try for ignition, if

 

 

it fails to ignite, leave the fan run for up to

 

 

three hours to dry out the insulation and

 

 

probe.

 

 

 

 

 

Reset Boiler so it will attempt to ignite.

 

 

Check for proper operation of ignition

 

 

components. Make sure igniter glows and

 

 

gas valve opens.

 

 

Check for proper line pressure at gas

 

 

valve when it opens.

 

 

If boiler lights check for flame signal

 

 

between FC1 And FC2 on Fenwal control.

 

 

If lower then 1.2 micro amps see Boiler

 

 

will not stay lit below.

 

 

Check combustion properties.

 

 

 

Boiler will not stay

Indicates lack of a good flame signal. In

If the Burner light on the Sentry is going

lit.

order to stay running the flame signal must

out, go to “Burner shutting off”.

 

be at least 0.7 micro Amps.

Check condensate drain for blockage and

 

 

check the inlet piping for ingested snow

 

 

or water (if the flame rod gets wet, it may

 

 

need to be replaced). Check for resistance

 

 

from flame rod to ground, must be an

 

 

open circuit (O.L).

 

 

Check for proper polarity of line and

 

 

neutral wiring to the boiler.

 

 

 

Boiler bangs or

Bangs or sounds like a kettle while burner

Ensure the plumbing is as shown in

hisses

is running indicating insufficient flow.

manual. Check to see if pumps are faulty

 

 

or end switches are stuck. This problem

 

 

can lead to boiler overheating!

 

 

 

Page 37 Page 39
Page 38
Image 38
Smith Cast Iron Boilers GT Series Two Flashes on, Fenwal, Three Flashes on, Boiler will not stay, Lit, Boiler bangs or
Page 37 Page 39

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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