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Air Conditioning and Refrigeration B asics Don Gulliver February 9, 2013

Air Conditioning and Refrigeration B asics Don Gulliver February 9, 2013 . Introducing …. Yacht Systems Services, Inc . Systems Approach Marine electrical and electronics Corrosion control Sanitation systems Air conditioning and refrigeration

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Air Conditioning and Refrigeration B asics Don Gulliver February 9, 2013

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  1. Air Conditioning and Refrigeration Basics Don Gulliver February 9, 2013

  2. Introducing … • Yacht Systems Services, Inc. • Systems Approach • Marine electrical and electronics • Corrosion control • Sanitation systems • Air conditioning and refrigeration • Industry-certified and factory trained staff • All technicians are ABYC certified • 14 years in business

  3. Introducing … • Don Gulliver • 30 years of experience in military, commercial and recreational marine systems (design, maintenance and repair) • ABYC certified Master Technician • Marine electrical • Marine air conditioning and refrigeration • Marine corrosion

  4. What is ABYC? • American Boat and Yacht Council • Writes the industry standards for construction and repair of recreational vessels. • Trains and certifies marine service professionals • Visit www.abycinc.org for certified technicians

  5. What we will cover • AC & Refrigeration Basics • Components • Theory • Application – installation/operation/maintenance • Troubleshooting

  6. Refrigeration • Components • Compressor • Condenser • Metering device (capillary tube) • Evaporator • Reefer/freezer box

  7. Refrigeration • Theory (only as much as a boat owner needs to know) • What is refrigeration? • Removal of heat • The refrigeration cycle

  8. Refrigeration • Installation • Power considerations • Amp-hour requirements • Battery sizing • Wiring • One step up on gauge size • Circuit protection device • Controls • Digital or analog

  9. Refrigeration • Installation • Condenser • Air to air • Water to air • Keel cooler • Ducting • Remove the heat!

  10. Refrigeration • Installation • Equipment locations • Compressor/condenser • Evaporator • Reefer/freezer box • Insulation • Openings • Air circulation • Linesets& Charging

  11. Refrigeration • Operation • Temperature settings • Refrigeration • Freezer

  12. Refrigeration • Operation • Monitoring run-time • Monitoring amp-hour usage • Improving performance • Box load • Seals • Circulation • Ice assist

  13. Refrigeration • Troubleshooting • Poor cooling performance • Can’t maintain temperature • Cools box intermittently • Compressor not running • Effects of Over/Under Charging • Uneven cooling in box

  14. Refrigeration • FAQ’s • Does frost inhibit cooling? • Cooling Load • Why does the box frost up? • Low pressure in the box • What to do if unit is not cooling normally? • Turn it off! • Is my system working at peak performance? • Instrumented tests

  15. Air Conditioning • What is air conditioning? • Modifying sensible temperature • Controlling humidity • Removing pollutants

  16. Air Conditioning • Components • The refrigerant loop • Compressor, condenser, capillary tube, evaporator • The seawater loop • Seacock, strainer, heat exchanger, discharge • Air flow • Blower, ducting, vents, filter

  17. Air Conditioning • Components • Electrical • Power • 120/240 • Amperage • Start Up demand • Controls • Analog • Digital

  18. Air Conditioning • Theory – Again, abbreviated explanation • The refrigeration cycle • Cooling – How it works • Removing humidity (latent heat) • Removing heat (sensible) • Heating – How it works • Electric strip heat • Use of reverse cycle heating

  19. Air Conditioning • Installation • Sizing system • “Sailboat” cool • “Sportfish” cool • Remote (split) or self contained system? • Noise • Space requirements

  20. Air Conditioning • Installation • Power • Amperage/wattage • 30A or 50A? • How does this affect the rest of the boat? • A/C with water heaters, microwaves, etc • Linesets & Charging • Self Contained • Remote (split) Systems

  21. Air Conditioning • Installation • Seawater • Materials and types of components • Seacock, strainer, heat exchanger, discharge • Air cooled or water cooled pump • No brass or cheap plastics • Location of components

  22. Air Conditioning • Installation • Ducting • Duct type • Size • Routing • Bends • Excesses • Restrictions • Condensate • Box or bilge?

  23. Air Conditioning • Operation • Monitor differential temperature • Run time • Set-point selection

  24. Air Conditioning • Maintenance • Keep it clean! • Strainer • Filter • Condensate pan • Condenser coil • Winterize • Seawater system • Condensate drain

  25. Air Conditioning • Troubleshooting • Circuit breaker trips • Unit is freezing up • Effects of Over/Under Charge • High pressure fault • Low pressure fault • Unit not cooling • Seawater pump not running • No water flow

  26. Questions? Don Gulliver (757) 422-9689 don@yssi.biz

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