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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 - PowerPoint PPT Presentation
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Air Conditioning and Refrigeration Basics
Don GulliverFebruary 9, 2013
Introducing …Yacht Systems Services, Inc.
Systems Approach Marine electrical and electronics Corrosion control Sanitation systems Air conditioning and refrigeration
Industry-certified and factory trained staffAll technicians are ABYC certified14 years in business
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
What is ABYC?
American Boat and Yacht CouncilWrites the industry standards for construction
and repair of recreational vessels.Trains and certifies marine service
professionalsVisit www.abycinc.org for certified technicians
What we will coverAC & Refrigeration Basics
ComponentsTheoryApplication –
installation/operation/maintenanceTroubleshooting
Refrigeration Components
Compressor Condenser Metering device (capillary tube) Evaporator Reefer/freezer box
RefrigerationTheory (only as much as a boat owner needs to know)What is refrigeration?
Removal of heatThe refrigeration cycle
Refrigeration Installation
Power considerations Amp-hour requirements Battery sizing Wiring
One step up on gauge size Circuit protection device
Controls Digital or analog
Refrigeration Installation
Condenser Air to air Water to air Keel cooler
Ducting Remove the heat!
Refrigeration Installation
Equipment locations Compressor/condenser Evaporator Reefer/freezer box
InsulationOpeningsAir circulation
Linesets & Charging
Refrigeration Operation
Temperature settings Refrigeration Freezer
Refrigeration Operation
Monitoring run-timeMonitoring amp-hour usageImproving performance
Box load Seals Circulation Ice assist
Refrigeration Troubleshooting
Poor cooling performance Can’t maintain temperature Cools box intermittently
Compressor not runningEffects of Over/Under ChargingUneven cooling in box
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
Air ConditioningWhat is air conditioning?
Modifying sensible temperature Controlling humidityRemoving pollutants
Air ConditioningComponents
The refrigerant loop Compressor, condenser, capillary tube, evaporator
The seawater loop Seacock, strainer, heat exchanger, discharge
Air flow Blower, ducting, vents, filter
Air ConditioningComponents
Electrical Power
120/240 Amperage Start Up demand
Controls Analog Digital
Air ConditioningTheory – Again, abbreviated explanationThe refrigeration cycleCooling – How it works
Removing humidity (latent heat) Removing heat (sensible)
Heating – How it works Electric strip heat Use of reverse cycle heating
Air ConditioningInstallation
Sizing system “Sailboat” cool “Sportfish” cool
Remote (split) or self contained system? Noise Space requirements
Air ConditioningInstallation
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
Air ConditioningInstallation
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
Air ConditioningInstallation
Ducting Duct type Size Routing
Bends Excesses Restrictions
Condensate Box or bilge?
Air ConditioningOperation
Monitor differential temperatureRun timeSet-point selection
Air ConditioningMaintenance
Keep it clean! Strainer Filter Condensate pan Condenser coil
Winterize Seawater system Condensate drain
Air ConditioningTroubleshooting
Circuit breaker tripsUnit is freezing upEffects of Over/Under ChargeHigh pressure faultLow pressure faultUnit not coolingSeawater pump not runningNo water flow
Questions?Don Gulliver
(757) [email protected]