GS110 DIRECT VENT BOILER INSTALLATION AND OPERATION INSTRUCTIONS

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Figure 20- Air and Manifold Pressure

BOILER CHECKING & ADJUSTMENT

INPUT RATE

Gas appliances are rated based on sea level operation with no adjustment required at elevations up to 2000 feet. At elevations above 2000 feet, input ratings should be reduced by 4% for each 1000 feet above sea level. Check the input rate as follows:

NATURAL GAS:

1.Turn off all other gas appliances that use the same gas meter as the boiler.

2.Call the gas company for the gas heating value.

3.Start the boiler and let it run for 15 minutes.

4.Using the gas meter and a stopwatch, clock the time that it takes to burn 10 cubic feet of gas and divide the time by 10.

5.Insert the heating value and the time, in seconds, into the formula below.

Input Rate = Heating Value(Btu/ft3)(3600 s/hr) Flow Rate(s/ft3)

EXAMPLE: If the heating value = 1000 Btu/ft3

and the flow rate = 36 s/ft3

Input Rate = (1000 Btu/ft3)(3600 s/hr) 36 s/ft3

Input Rate = 100,000 Btu/hr

If the computed rate deviates by more than 5% from the rated input value of the unit adjust the gas valve pressure accordingly. DO NOT adjust the manifold pressure by more than 5%. If a proper rate cannot be maintained without adjusting the manifold pressure beyond the 5% limit, the burner orifice must be replaced. If the input rate is too low go to the next larger size orifice. if the input rate is too high, go to the next smaller size orifice.

PROPANE GAS:

The input rate for LP units is factory set based on the orifice size. The manifold pressure must be set at 1.9" W.C. and the orifice supplied with the boiler used unless the unit is to be derated for altitude.

CAUTION: Never increase the input to the boiler above that for which it is rated. Doing so can cause premature failure of the boiler!

GAS PRESSURE ADJUSTMENT

NATURAL GAS:

Optimum results are obtained when the boiler is operated at its full input rating, with 1.9" W.C. of manifold pressure. The manifold pressure should not be more that 5% off this value. The gas valve pressure regulator has been preset at the factory. If adjustment is necessary the following steps must be followed:

1.Connect each side of a manometer to the two pressure ports shown in Figure 20 to obtain the manifold pressure.

2.Connect a flue gas analyzer to the vent pipe.

3.Rotate the regulator adjustment screw clockwise to increase the manifold pressure, counterclockwise to decrease it. Never force the regulator adjustment screw or the gas valve will be damaged!

4.The CO2 reading should fall between 7% and 9% with a CO reading of less than 50 ppm air free.

5.Adjust the air damper using the screw on the front

of the filter box if the CO2 and CO readings are not within the range given in step 4.

6.Recheck the manifold pressure and adjust it if necessary.

7.Replace the regulator adjustment screw cap and pressure port caps once the boiler is properly set up.

PROPANE GAS:

A manifold pressure of 1.9" W.C. must be maintained for proper operation of the boiler. If the manifold pressure is off by more than 5% or if the CO2 and CO readings are not within the range specified in step 4 above, adjust it according to steps 1 through 7 above.

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Smith Cast Iron Boilers GS110W operation manual Boiler Checking & Adjustment, Air and Manifold Pressure
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GS110W specifications

The Smith Cast Iron Boilers GS110W stands as a premier choice for those seeking efficiency and reliability in heating systems. Known for their robust construction and advanced engineering, Smith Boilers are designed to meet the needs of both residential and commercial applications. The GS110W model showcases an impressive blend of performance and durability, making it a favorite among HVAC professionals and end users alike.

One of the main features of the GS110W is its cast iron construction. Cast iron is celebrated for its ability to retain heat, allowing the boiler to operate efficiently while providing consistent warmth over extended periods. This material also contributes to the boiler's longevity, allowing it to withstand the rigors of heating without significant wear and tear. The GS110W is designed to last, making it a wise investment for any heating needs.

The GS110W boasts an output capacity of 110,000 BTU/hour, making it suitable for a variety of heating applications. This output enables it to efficiently heat large spaces, whether in a multi-story building or a spacious home. The boiler’s efficiency rating is further enhanced by its ability to use multi-fuel options. It can efficiently burn oil or gas, providing flexibility depending on the availability and cost of fuel.

In terms of technology, the GS110W incorporates advanced boiler design that includes a submerged combustion chamber. This engineering feature allows for superior heat transfer while minimizing heat loss, ensuring that the maximum amount of energy is utilized for heating. Additionally, the boiler features a low water cutoff to enhance safety, preventing potential overheating and system failures.

Reliability is further ensured through the GS110W’s built-in controls and adjustments. The boiler is equipped with a digital aquastat that allows for precise temperature management, ensuring optimal performance. This user-friendly feature makes it easier for homeowners and technicians to monitor system conditions and make necessary adjustments for peak efficiency.

Another noteworthy characteristic of the Smith Cast Iron Boilers GS110W is its low emissions output. As environmental considerations become increasingly important, the GS110W is designed to minimize its environmental impact while still delivering powerful heating capabilities.

In conclusion, the Smith Cast Iron Boilers GS110W offers an outstanding combination of durability, efficiency, and advanced technology. Its robust cast iron construction, multi-fuel capability, and innovative design features make it a top choice for anyone looking to enhance their heating system. For those in search of reliable and efficient heating solutions, the GS110W stands out as a formidable contender.
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