Carrier GT-PW (50YEW) Manual

Contents

50YEW Water-To-Water Design FeaturesThe 50YEW series is unlike any other water-to-water heat pump onthe market today. The large operating map of the scroll compressorallows high temperature operation, up to 145°F [63°C] leavingload water temperature even at 32°F [0°C] entering source watertemperature. The combination of a coaxial (tube-in-tube) heatexchanger for the source (ground loop) side and a brazed plateheat exchanger for the load (heating/hot water) side provides veryhigh efficiencies. Integral controls for hydronic heating and domesticwater heating avoid the need for external microprocessor-basedcontrols for outdoor temperature reset, warm weather shutdown,staging and other controls.The 50YEW has an extended range refrigeration circuit, capable ofground loop (geothermal) applications as well as open loop (wellwater) applications. Standard features and factory-installed optionsare many. Unique application-specific controls make the 50YEWseries ideal for hydronic heating and domestic hot water generation.The heating-only refrigeration circuit is optimized for high watertemperatures, heating efficiencies, and capacities.The dual level compressor isolation mounting system, insulatedcompressor enclosure, and compressor discharge muffler makethe 50YEW series one of the quietest water-to-water heat pumpsavailable. The attractive “Euro-style” cabinet allows the unit to fit intoany decor.Application Flexibility• Capacities 10kW [32,600 Btuh].• High temperature scroll compressor, up to 145°F [63°C] leavingwater temperature.• Ultra high efficiencies (4.2 COP at ground loop conditions; up to5.5 COP at ground water conditions).• Built-in programmable controller with Outdoor Temperature Resetand Warm Weather Shutdown.• Large, back-lit digital user interface.• Rugged coaxial (tube-in-tube) “Source” heat exchanger (copper orcupro-nickel).• Close approach temperature brazed plate stainless steel “Load”heat exchanger.• Dual level compressor isolation, compressor enclosure, anddischarge muffler for Ultra quiet operation.• “Euro-style” cabinet for attractive look.• Insulated cabinet with foil backed insulation for ease of cleaning.• Flush-mount FPT fittings, secured to the cabinet (no backupwrench required).• TXV metering device.• 12-point low voltage terminal strip for ease of installation.• ETL safety listing.• Wide variety of options including internally factory installedDomestic Hot Water Mode, Load and Source side pumps withexpansion tanks, VSFP (variable speed floor pump connection)Controls and Cupro-Nickel Source Heat Exchanger.Service & Installation Advantages• Hinged front access door and 3 removable panels for easeof installation and service.• Galvanized steel construction with protective powder coat paintand hinged front access door.• Bi-directional thermal expansion valve.• Puron® HFC-410A zero ozone depletion refrigerant.• Circuit breaker protected 75VA control transformer.• High and low pressure service ports on refrigerant circuit.• Accurate refrigerant sensing freeze protection.Factory Quality & Certifications• All units are built on our Integrated Process Control AssemblySystem (IPCS). The IPCS is a unique state of the art manufacturingsystem that is designed to assure quality of the highest standards ofany manufacturer in the water-source industry. Our IPCS system:a. Verifies that the correct components are being assembled.b. Automatically performs special leak tests on all joints.c. Conducts pressure tests.d. Performs highly detailed run test unparalleled in theHVAC industry.e. Automatically disables packaging for a “failed” unit.f. Creates computer database for future service analysis anddiagnostics from run test results.• All units are water run-tested in all modes to insure efficiencyand reliability.• Heavy gauge galvanized steel cabinets are epoxy powder coatedfor durable and long-lasting finish.• All refrigerant brazing is done in a nitrogen atmosphere.• All units are deep evacuated to less than 100 microns prior torefrigerant charging.• All joints are both helium and halogen leak tested to insure annualleak rate of less than 1/4 ounce.• Coaxial heat exchanger, refrigerant suction lines and all waterlines are fully insulated to eliminate condensation problems in lowtemperature applications.• Noise Reduction features include: dual level compressor isolation,insulated compressor compartment, interior cabinet insulationusing 1/2” coated glass fiber, and variable speed fan.• Safety features include: high pressure and loss of charge toprotect the compressor, condensate overflow protection, freezeprotection sensors to safeguard the coaxial heat exchangerand air coil, hot water high-limit and low compressor dischargetemperature switch provided to shut down the hot watergenerator when conditions dictate. Fault lockout enablesemergency heat and prevents compressor operation untilthermostat or circuit breaker has been reset.• 10-year limited warranty on major refrigerant circuit components,Optional extended warranties available.• AHRI/ASHRAE/ANSI/ISO 13256-2 certified.• NRTL & CSA listed.• US EPA “Energy Star” compliant.• ISO 9001:2000 Certified.Options & Accessories• Full Condensing Hot Water Generation With Internal SecondaryHeat Exchanger and Potable Water Circulating Pump.• Factory Installed “Load” and “Source” Pumps.• Factory Installed Expansion Tanks.• Cupro-Nickel Source Water Coil.• Extended Labor Allowance and Service Warranty.Carrier Geothermal Heat Pump Systems50YEW3Residential Products Technical Guide