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COMPONENT SELECTION PUTTING THE PARTS TOGETHER (SOLDERING) MAINTENANCE AND REPAIR SUMMARY, CRITIQUE, QUESTIONS. Component Selection. Heat is a problem Corrosion is a problem UV is a problem Most plastics are a problem. Pumps. Match the pump to the job Match the type of pump to the job.
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COMPONENT SELECTION • PUTTING THE PARTS TOGETHER (SOLDERING) • MAINTENANCE AND REPAIR • SUMMARY, CRITIQUE, QUESTIONS
Component Selection • Heat is a problem • Corrosion is a problem • UV is a problem • Most plastics are a problem
Pumps • Match the pump to the job • Match the type of pump to the job
Circulator Pump Head • Pump Head = 2.31 feet per PSI • Drainback systems need high head pumps • Closed loop systems do not • Open loop systems need bronze, stainless or plastic impeller housings
Common Circulator Pumps • Taco • Grundfos • Bell & Gossett • Armstrong • March – DC – highest head • Hartell • El Sid – DC very efficient
Pump Orientation Vertical Recommended Horizontal OK Causes bearing failure
Taco Pump Head • Taco 006 – 9 ft • Taco 008 – 16 ft • Taco 009 – 33 ft • Taco 0011 – 30 ft – high flow
Solar Workhorse Pumps - AC • Grundfos 15-42 F or S, Taco 008 F or B for collector loops – direct pump or closed loop antifreeze • Grundfos 15-18 S or Taco 006 B for DHW • Grundfos 26-96 F or B, Taco 009 F or B for Drainback systems
DC Pumps for Solar systems • Collector loops • March 809 or El Sid PV 10 • Larger systems – more that 2 -3 collectors • March 809 HS, El Sid
Pump Equivalents • Taco 006 – Hartell MD3 IU – March 009 12 VDC • Taco 008 – Grundfos 15-42 – March 009 HS 12 VDC • Taco 009 – Grundfos 26-96
Heat Exchangers • One Pass • Internal unpressurized • External double wall • Wraparound • Internal pressurized
Tank Construction • Steel (with liner) • Stainless Steel • Polypropylene • Fiberglass (with poly liner)
Putting the parts together • Controls and wiring • Roof work • Soldering pipe
Controls • Differential Controls • Aquastats • Thermostats (line voltage and low voltage) • Relays • Bimetals
Roof Work • Collector Mounts to Joists • Seal with plastic roof cement or silicone caulk • Insulate piping and duct work and weatherproof
Roof Penetrations • Roof jacks (flashing) • Collector mounts