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Boiler Reset Control

Boiler Reset Control. It doesn’t have to be complicated!. Your Customers’ #1 Concern!. Energy efficiency Cars Lights & appliances Home heating What about boilers? Replace? Improve?. Some Basics…. Heat loss Size for “coldest day” < 3% of heating season Install for “coldest day”

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Boiler Reset Control

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  1. Boiler Reset Control It doesn’t have to be complicated!

  2. Your Customers’ #1 Concern! • Energy efficiency • Cars • Lights & appliances • Home heating • What aboutboilers? • Replace? • Improve?

  3. Some Basics… • Heat loss • Size for “coldest day” • < 3% of heating season • Install for “coldest day” • Heat loss varies • ↑ as it gets colder • ↓ as it gets warmer

  4. More Basics… • Heat supplied must = heat lost • Boiler is one size • Heat emitters one size • How do we keep from overheating? • Fewer BTU’s needed • Shorten run time

  5. Still More Basics… • Short-cycling • Shortens run-fraction • Kills cycle efficiency • More wear & tear • Greater standby losses • Inefficient operation • Stop & go city driving

  6. Add Boiler Reset! • Matches boiler output to heating load • Automatically adjust boiler temp • Colder out – hotter water • Warmer out – cooler water • ↓ boiler temp – use less fuel • Reduce standby losses • Reduce losses to unheated spaces • Conservative savings estimate: • 5 to 15% for CI, non-condensing boiler

  7. 5 to 15%? That Ain’t Much… • Or is it? • Older home using 1,200 gallons/yr • Split the difference – call it 10% • Save 120 gallons • At $3.75/gallon – that’s $450.00 savings! • A good investment?

  8. So, What’s Involved? • Taco PC-700 & EXP relay • E-Z installation • E-Z wiring • E-Z programming

  9. How Does It Work? • Calculates required boilertemp based on weather,programming • Tells boiler when to fire& target temp • Monitors differential • Prevents short-cycling • Automatic adjust • “Partial” reset – non condensing boilers

  10. Problem… • 3 zones w/indirect • 7 year old boiler • Gas conversion - $9K • Homeowner goal:use less fuel,save $$ • Easy reset!

  11. A Priority On Here’s What We Have: Control for 3 heating zones + DHW priority Using SR 504

  12. Boiler Reset Made Easy • Option 1: • Keep SR 504 • Add SR 501-EXP relay • Add PC-700 Boiler Reset control • Option 2: • Dump SR-504 • Add SR 504-EXP • Add PC-700 Boiler Reset control

  13. A T T DHW Circulator Option 1

  14. A T T Option 2

  15. Min: 10 seconds Max: 7 Minutes Plug-In Power Port Cards • PC-600 – Post Purge Timer • PC-605 – Priority Protection • PC-610 – Pump Exercise

  16. Installing The Sensors • Boiler sensor: • 1 Boil • 3 Com • Outdoor sensor • 2 Out • 3 Com

  17. The Boiler Sensor • Strapped to piping – not too tight! • Insulate for accuracy • Downstream from an elbow

  18. The Outdoor Sensor • Flush mount or electrical box • North facing wall (usually) • Out of direct sunlight • Away from dryer vent, etc • Above snowline!

  19. Programming • Two menus • View • Adjust • Three buttons • Item • Up/Down arrows

  20. The View Menu • Press Item button to scroll • Startup • Outdoor Temp • Boiler Temp • Boiler Target

  21. Programming Made Easy! • PC-700 factory programmed! • Settings for typical Northeast US system

  22. The Adjust Menu • BOIL Start • OUTDR Start • BOIL DSGN • OUTDR DSGN • BOIL MIN • DIFF • WWSD • Units

  23. Reset Myths • Reset can’t be used withCast iron/non-condensingboilers… • Reset can’t be used withindirect water heaters… • You need an engineeringdegree to figure ‘em out… • Reset’s not worth the $$$... • Can’t use reset with baseboard…

  24. Sterling Slant/Fin Baseboard Ratings

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