Smith Cast Iron Boilers GT Series manual Multiple Boiler Primary Loop, Primary Loop Plumbing

Page 13

GT INSTALLATION AND OPERATION INSTRUCTIONS

Page 13

Low Water Cut Off, LWCO

If a LWCO is used ensure that the water line of the “Low Water Cutoff” is at least 6 in, 152 mm, above the top of the boiler, Figure 21. It is recommended that the LWCO be situated so that it can be tested without removing water from the boiler. Tri-cocks and a gauge glass are highly recommended. Valves shall not be installed between the LWCO and the boiler. Use an air vent if installed as per our diagram to be used as a vacuum breaker and to eliminate air upon filling.

Figure 21 - LWCO & Air Vent Piping

Figure 22 - Boiler Head Loss

 

 

 

 

 

GT-150

 

GT-200

 

 

GT-400

Head

60

 

 

 

 

 

 

 

 

 

 

 

 

 

40

 

 

 

 

 

 

 

 

 

 

 

 

 

of

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Feet

20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

4

6

8

10

12

14

16

18

20

22

24

26

27

GPM us

Table 3 lists the recommended circulators for use as the primary and indirect loop pumps.

Figure 23 shows the proper way to plumb a primary loop for single boiler installations.

MULTIPLE BOILER PRIMARY LOOP

Figure 24 shows the proper way to plumb a primary loop for multiple boiler installations.

PRIMARY LOOP PLUMBING

This low mass boiler requires a continuous minimum water fl ow for proper operation. The heat exchanger in this boiler is more restrictive than a conventional boiler. The system pump must be sized to overcome the head loss of the boiler, Figure 22. Greater consideration must be given to the capabilities of the circulating pump(s) in the primary-loop. This includes the pump used for an indirect tank.

SECONDARY LOOP PLUMBING

Figures 25 and 26 show some typical primary/ secondary piping systems. It is the responsibility of the installing contractor to determine which system best meets the need of the installation. Contractor modifications to these instructions may be required, based upon the existing piping and system design.

Table 3 - Recommended Primary and Indirect Loop Circulators

 

 

 

Minimum

Max. Temp.

 

Minimum Primary &

 

 

 

Restriction

Flow

Rise

 

Indirect Pump Size

 

Model

 

Head Loss

GPM, L/s

°F, °C

B&G

Grundfos

Taco

GT-150

7 ft at 6 GPM, 2.1 m at 0.4 L/s

6, 0.4

45, 25

NRF-33

UP 26-64

0010

 

 

 

 

 

 

 

 

GT-200

10 ft at 8

GPM, 3 m at 0.5 L/s

8, 0.5

45, 25

PL-36

UP 26-99

0011

 

 

 

 

 

 

 

 

GT-400

10 ft at 20

GPM, 3 m at 1.25 L/s

13, 0.8

57, 45

PL-36

UP 26-99

0011

 

 

 

 

 

 

 

 

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Page 12 Page 14
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 ValvePrimary Loop Plumbing Multiple Boiler Primary LoopSecondary 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 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 Boiler Modulation Sentry 2100T ControllerIndirect Water Heaters Sentry DisplayRecommended Settings Setting Sentry 2100T controlRecommend System Temperatures Outdoor Sensor 10K= 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 Gas Pressure Adjustment Boiler Checking & AdjustmentInput Rate Main Burner FlameBoiler Maintenance Aquastat High Limit Wall Hung ConversionTemperature is Trouble ShootingBurner shuts off Before set-pointAir Switch is Closed Air Switch is OpenIndicates that Ignition SequenceFenwal Two Flashes onThree Flashes on Boiler will not stayHousing Creating a noise Residence. This is not a warranty issueWarranty issue Sentry ControllerGT 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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