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Snow Melting 5) Calculating the Circuit Information

Snow Melting 5) Calculating the Circuit Information. Divide total tubing by max. circuit length (round up). Snow Melting 6) Water/ Glycol Design. Selecting the percentage of glycol. Snow Melting 7) Flow Rates (gpm). gpm =. short form for snow melting T @ 30 F°. Btus D T x 500. Btus

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Snow Melting 5) Calculating the Circuit Information

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  1. Snow Melting5) Calculating the Circuit Information • Divide total tubing by max. circuit length (round up)

  2. Snow Melting 6) Water/ Glycol Design • Selecting the percentage of glycol

  3. Snow Melting 7) Flow Rates (gpm) gpm = short form for snow melting T @ 30 F° Btus DT x 500 Btus 15,000 • Calculate flow for each snow melting area • Divide by number of circuits in area to get gpm per circuit • Use flow per circuit to find pressure drop

  4. Snow Melting 8) Pressure Drop 2 gpm through 5/8" PEX = 0.055 feet of head loss per foot of tubing Circuit length = 250’ Pressure drop = length x loss per foot 250 x 0.055 = 13.75 ft. head 2.0 0.055

  5. Glycol Effects on the System Flow Rate Pressure Drop % Glycol Mixture % Increase Multiplier % Increase Multiplier 30% 5% (1.05) 20% (1.20) 40% 8.5% (1.085) 25% (1.25) 50% 12.5% (1.125) 31% (1.31) Snow Melting9) Pressure Drop and Flow Rate Adjustments • Use the table to adjust the pressure drop and flow rates according to % Glycol mixture

  6. Snow Melting10) Pump Sizing • Add gpm of all areas together • Take highest head loss in tubing • Add any additional head loss (other piping, valves, etc.) • Choose pump from manufacturer curves

  7. Snow Melting Cross Sections Slab on grade with insulation

  8. Snow Melting Cross Sections Pavers over sand or stone dust bed with insulation

  9. Snow Melting Cross Sections Asphalt over sand or stone dust bed with insulation

  10. Snow Melting Cross Sections Slab over structural slab

  11. Snow Melting Construction • Utilize expansion joints as with a radiant slab (100 foot perimeters, 25’ x 25’ max) • Use bend supports and sleeves to protect tubing at all penetration points and expansion joints • Insulate under snow melt area • Insulate sides of slab (very high heat loss)

  12. Snow Melting Tubing Layout: standard

  13. Snow Melting Tubing Layout: stairs

  14. Snow Melting Selecting the Control Package • Basic Digital Snow Melting Control II package • Economical system required • Snow sensor cannot be mounted in the thermal mass

  15. Snow Melting Basic Control Piping

  16. Snow Melting Selecting the Control Package • Advanced snow melting control package • Slab protection • Boiler protection • Manual override • WWSD (Warm Weather Shut Down) • CWCO (Cold Weather Cut Out) • Test sequence • Pump exercising

  17. Snow Melting Advanced Control Piping Option 1

  18. Snow Melting Advanced Control Piping Option 2

  19. Snow Melting Advanced Control Piping Option 3

  20. Climate Mat Header

  21. Assembled header Pressurized 20’ leaders Climate Mat Header after finish pour

  22. Climate Mat being rolled out.

  23. Kyle Busch Racing – Garage - Radiant • KYLE BUSCH GARAGE – HILLS SERVICE CO. • Project location – Mooresville, North Carolina • Contractor – Hills Service Company • Viega employees assisted in the installation of the Viega Climate Mat Radiant system for this 60,000 square foot race shop. • The Viega Climate Mat was selected due to the functionality and ease of installation in comparison to other radiant systems in the market. • This project will achieve a greater “GREEN” number or “LEAD POINTS” due to the use of Geothermal and having it tied into the Viega Radiant System.

  24. Kyle Busch Racing – Garage - Radiant Jay & Kevin work diligently to find the Climate Mates to place in the garage and wash bay areas. Garry is busy hammering down the Climate Mate. Main garage area prior to install. Example of one of the connected manifolds for the Kyle Busch garage. Example of the proper spacing and install of Climate Mat. Main garage after Climate Mate install.

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