Carrier GT-PX, GT-G, GT-S User Manual

GEOTHERMAL SPLIT SYSTEMS

CARRIER

INDOOR & OUTDOOR SPLIT GEOTHERMAL

HEATING AND COOLING COMFORT SYSTEMS

GT-PX INDOOR SPLIT (50YDS) SERIES - SIZES 026-064

GT-G INDOOR SPLIT (50YCS) SERIES - SIZES 018-060

GT-S OUTDOOR SPLIT (38WQS) SERIES - SIZES 018-060

Indoor & Outdoor Split

Geothermal Comfort Systems

Table of Contents

Geothermal Advantages ....................................................................................................................................................................................................................................... 2

Loop Systems ............................................................................................................................................................................................................................................................. 3

GT-PX Indoor Split (50YDS) Series Introduction ................................................................................................................................................................................. 4

GT-PX Indoor Split (50YDS) Series Features & Beneﬁ ts .................................................................................................................................................................. 5

GT-G Split Indoor (50YCS) Series Features & Beneﬁ ts ..................................................................................................................................................................... 8

GT-S Outdoor Split (38WQS) Series Introduction .............................................................................................................................................................................10

GT-S Outdoor Split (38WQS) Series Features & Beneﬁ ts .............................................................................................................................................................. 12

ARI/ISO/ASHRAE 13256-1 Data .................................................................................................................................................................................................................... 14

Model Nomenclature .............................................................................................................................................................................................................................................16

Reference Calculations & Legend ...................................................................................................................................................................................................................17

GT-GS/GT-S Performance Correction Factors ........................................................................................................................................................................................ 17

GT-PX Performance Correction Factors ....................................................................................................................................................................................................18

GT-PX Performance Data ................................................................................................................................................................................................................................... 19

GT-GS/GT-S Performance Data .......................................................................................................................................................................................................................27

Physical Data ...............................................................................................................................................................................................................................................................34

GT-PX Dimensional Data ....................................................................................................................................................................................................................................35

GT-GS Dimensional Data .................................................................................................................................................................................................................................... 36

GT-S Dimensional Data ........................................................................................................................................................................................................................................37

Electrical Data ............................................................................................................................................................................................................................................................. 38

Thermostat Wiring ..................................................................................................................................................................................................................................................39

CXM Control Features .........................................................................................................................................................................................................................................40

Typical Wiring Diagram - GT-PX Units ........................................................................................................................................................................................................43

Typical Wiring Diagram - GT-GS Units ........................................................................................................................................................................................................ 44

Typical Wiring Diagram - GT-S Units ............................................................................................................................................................................................................ 45

Equipment Selection ............................................................................................................................................................................................................................................... 46

Engineering Guides .................................................................................................................................................................................................................................................. 49

Accessories, Options, & Warranty .................................................................................................................................................................................................................. 52

Guide Revision Log .............................................................................................................................................................................................................................Back Cover

Revised: 08/10/05D

Carrier Indoor & Outdoor Split Geothermal Heat Pumps - Rev.: 08/10/05

Carrier

Geothermal Advantages

Geothermal systems transfer heat from a build ing to the earth in the cooling mode, or from the earth to the building in the heating mode. Water is used as the heat transfer medium, either in a closed loop piping system, or by directly pumping well water. By using this stable thermal source, geothermal heat pumps provide energy efﬁ cient comfort year around.

Highest Efﬁ ciency

The extremely high levels of efﬁ ciency are possible because a geothermal heat pump only uses electricity to move heat, not produce it. A geothermal unit typically supplies 4 kilo watts of heat for every kilowatt of elec tric i ty used. Three of these kilo watts of heat come directly from the ear th itself, and are clean, free, and renewable. Overall, geothermal technology offers the highest cooling EER’s and heating COP’s available in the industry. Most systems also include a hot water generator, which diverts a portion of the supplied heat to the domestic water heater. This provides a substantial portion of a family’s hot water needs at a very low cost. Overall, geothermal technology offers the highest cooling EER’s and heating COP’s available in the industry.

Agency (EPA) and the De part ment of Energy (DOE). Because it is lowest in CO2 emissions, geothermal tech nol o gy provides a solution to global warming by primarily using the natural energy of the earth. In contrast, traditional space conditioning systems depend upon the exploitation and burning of fossil energy sources with the resultant greenhouse gas emis sions. Also, Puron® HFC 410A refrigerant is used in the GT-PX series equipment for minimum global warming impact and zero ozone depletion.

Better Investment

Low life-cycle costs are provided by the low op er at ing and maintenance costs of geothermal systems, even when the higher initial in stal la tion costs are considered. In new con struc tion, monthly energy savings typically exceed the increased mort gage payments. Therefore, cash ﬂ ow can be positive from the start. In retroﬁ t systems, a buyer who purchases with cash usually realizes a return on in vest ment well above certiﬁ cate of deposit rates. And, with equip ment life ex ceed ing 20 years, a Carrier geothermal system is a lasting in vest ment.

Electric utilities, recognizing the dual beneﬁ ts of high efﬁ ciency and low electric peak demand, often provide incentives to purchase these systems.

Maximum Comfort

Geothermal heat pumps also provide higher comfort levels than traditional space conditioning equipment. By using a relatively warm source of heat such as the earth, supply air temperatures are signiﬁ cantly higher in the heating mode than traditional air-source heat pumps. Geo ther mal heat pumps also cycle much less often than fossil furnaces, creating a consistent indoor temperature with comfortable relative humidity.

Environmentally Friendly

The environmental advantages of geothermal systems have caught the eye of governmental agencies such as the En vi ron men tal Pro tec tion

Carrier Indoor & Outdoor Split Geothermal Heat Pumps - Rev.: 08/10/05

Before choosing a geothermal system, many application factors must be evaluated including:

• Ground water availability and quality

• Loop installation costs

• Land area available

• Sub-soil conditions

• Local codes

• Owner preferences Carrier dealers have the expertise and computer software to determine the best type of system. Many regions have contractors specializing in the in stal la tion of the ground loop portion of the system.

Indoor & Outdoor Split

Geothermal Comfort Systems

Closed Loop Systems

Closed Loop Systems consist of an underground heat exchange network of sealed, high strength poly eth yl ene plastic pipe and a Flow Controller pumping module. When cooling, the loop ﬂ uid temperature will rise, and rejected heat is dissipated into the cooler earth. Con verse ly, while heating, the loop ﬂ uid temperatures fall, and heat is absorbed from the earth. Carrier Flow Controller pumping modules utilize small wattage pumps to circulate the water/antifreeze ﬂ uid within the piping system. The plastic heat exchange loop is closed and ther mal ly fusion-welded at all connections in the same manner as natural gas distribution lines. Closed loops do not require a ground water supply or drain, and they are not subject to mineral build up.

Closed Loops can be installed in vertical or hor i zon tal conﬁ gurations, or submerged in a pond or lake. When designed properly, all three alternatives operate with similar efﬁ ciency. Carrier high density poly eth yl ene plastic pipe is used for all closed loop installations. Pipe con nec tions are heat fused to form joints that are stronger than the pipe itself. Carrier loop piping has a life expectancy in excess of 50 years.

Vertical Loops are the ideal choice when available land area is limited. Drilling equipment is used to bore smalldiameter vertical holes. Two pipes joined together with a u-bend ﬁ tting are inserted into the vertical bore. Bore hole depth ranges from 100-300 feet per system ton. Bores must be spaced from 10-15 feet apart and properly grouted. The land space required ranges from 100-200 square feet per system ton.

Pond (Lake) Loops are very economical to install when a body of surface water is available, because ex ca va tion costs are mostly eliminated. Coils or “slinky” mats of pipe are simply placed on the bottom of the pond (lake). In most cases, 1/4 to 1/2 acre of water surface, with a min i mum depth of 8-10 feet, is needed for a typical res i dence.

Horizontal Loops are often considered when adequate land space is available. The pipes are placed in trenches, excavated by a backhoe or chain trencher to a depth of 4-6 feet. De pend ing on design, from 1-6 pipes are installed in each trench. Multiple pipe and coiled “slinky” con ﬁ g u ra tions are often used to conserve land re quire ments and reduce overall installed loop costs. Horizontal boring technology can also be used to install u-bend loops 10-15 feet deep with minimal landscaping disruption. Trench lengths range from 100-400 feet per system ton. Trenches must be spaced from 6-10 feet apart. The overall land area required ranges from 750-1,500 square feet per system ton.

Carrier Indoor & Outdoor Split Geothermal Heat Pumps - Rev.: 08/10/05

Ground Water Systems

Open loop systems utilize ground water as a direct energy source when good quality water is available at a reasonable pumping depth. A well must have enough capacity to deliver a minimum of 1.5 gpm per system ton during peak op er a tion. Ditches, ﬁ eld tiles, ponds and streams are the most common discharge systems. Re in jec tion or semi-closed recirculation wells can also be utilized in some regions. In ideal con di tions, an open loop ap pli ca tion can be the most eco nom i cal type of system to install.

GT-PX

Rounding Out the Product Line

Building upon the overwhelming market success of the GT-PX packaged unit, the split system uses the same components in a more ﬂ exible conﬁ guration. The GT-PX split system compressor section can be coupled with a variety of air handlers and add-on furnace coils to achieve the highest efﬁ ciencies of any split system heat pump on the market today, while still providing the ﬂ exibility of an all-electric or dual fuel system and a remote compressor section location. Split systems are often used in areas where it would be difﬁ cult to install a packaged unit, such as in an attic or crawl space.

Puron® Refrigerant

Puron® is a non-chlorine based (HFC 410A) refrigerant, that with R-407C and R-134A, is seen as the future of all refrigerants used worldwide. HFC 410A characteristics compared to R22 are:

• Binary and near azeotropic mixture of 50% R-32 and 50% R-125.

•

Higher efﬁ ciencies (50-60% higher operating pressures).

• Zero ozone depletion potential and low global warming potential.

• Virtually no glide. Unlike other alternative refrigerants, the two components in HFC 410A have virtually the same leak rates. Therefore, refrigerant can be added if necessary without recovering the charge.

Copeland Two-Stage Scroll Compressor

Achieve a greater level of comfort. The Copeland Scroll UltraTech™ provides superior comfort than ﬁ xed-capacity compressors by incorporating a revolutionary twostep design. With a unique 67% part-load capacity step, systems with UltraTech™ maintain precise temperature levels and lower relative humidity. This eliminates uneven peaks and valleys

and allows for steady cooling comfort. Homeowners now have a better, more efﬁ cient way to power their heating and cooling system, raising their level of comfort, while lowering energy bills. So when your customers need a new heating and cooling system, make sure it has the best technology inside – the Copeland Scroll UltraTech™ compressor.

Save with superior efﬁ ciency. Over 40% of summer utility bills can come from the air conditioner compressor operation. A system with the Copeland Scroll UltraTech™ compressor delivers higher efﬁ ciency than any other single compressor system. In fact, systems with UltraTech™ provide up to 60% greater energy efﬁ ciency as compared to 10 SEER systems – which can save homeowners hundreds of dollars a year in energy costs.

Take it easy with quieter control. Copeland Scroll UltraTech™ is remarkably quiet at both full- and part-load capacity. In fact, it is up to four times quieter than a reciprocating compressor. Homeowners can enjoy its superior efﬁ ciency and comfort without having to hear the operation.

Learn the beauty of the design. With Copeland Scroll UltraTech™, two internal bypass ports enable the system to run at 67% part-load capacity for better efﬁ ciency and humidity control. Based on demand, the modulation ring is activated, sealing the bypass ports and instantly shifting capacity to 100%. Take advantage of “shift on the ﬂ y” stage changing (no stopping and starting required like other two-stage compressors).

Choose proven scroll performance. While Copeland Scroll UltraTech™ builds on established scroll technology, it is still a scroll at heart, which means it operates with fewer moving parts, no volumetric efﬁ ciency drop-off or compression leakage. The result is unsurpassed reliability and virtually silent operation for both indoor and outdoor applications.

Carrier Indoor & Outdoor Split Geothermal Heat Pumps - Rev.: 08/10/05

Two-Stage Indoor Split

Puron® Systems

Other New Features

• Stylish two-tone look with textured black powder coat paint and stainless steel front access panel.

• Liftout handle for front access panel.

• Factory supplied (ﬁ eld-installed) ﬁ lter drier for trouble free reliability.

• Easy access low proﬁ le horizontal control box.

• Double isolated compressor for quiet and vibration free operation.

• Spring-mounted compressor for additional noise suppression.

• Open Service-Friendly Cabinet (i.e, all components in compressor section can be serviced from the front).

The GT-PX Series Split System has abundant features and industry leading efﬁ ciency.

Application Flexibility

• Four Capacities 026, 038, 049, and 064.

• Extended range operation (20-120°F EWT) and ﬂ ow rates as low as 1.5 gpm per ton.

• Compressor section match-ups for a variety of air handlers and add-on furnace coils for the ultimate in system and fuel type ﬂ exibility.

• Precharged compressor section with back-seating service valves for quick installation.

• Circuit breaker protected loop and hot water generator pumps.

• Field selectable freeze protection setting for well or loop.

•

Puron® HFC 410A zero ozone depletion refrigerant.

• Highest efﬁ ciencies for split systems in ARI/ISO/ ASHRAE/ANSI 13256-1 ratings for heating COP’s, cooling EER’s with low water ﬂ ow rates.

• Two-Stage operation for ultra high efﬁ ciencies and unsurpassed comfort.

• Operating temperature range and high efﬁ ciency allow shorter loops.

• Optional hot water generator with internal pump generates hot water at considerable savings.

• Rugged and highly efﬁ cient next generation Copeland UltraTech™ scroll compressors provide the industry’s highest efﬁ ciencies and full capacity with reduced cycling losses.

• Oversized coaxial tube water-to-refrigerant heat exchangers operate at low liquid pressure drop. Convoluted copper (and optional cupronickel) water tube functions efﬁ ciently at low-ﬂ ow rates and provides freeze-damage resistance.

Service Advantages

• Removable panels - 3 for compressor section (plus removable top panel).

• Low proﬁ le control box grants easy access to all internal components.

• Factory supplied (ﬁ eld installed) liquid line ﬁ lter/drier.

• Brass swivel-type water connections for quick connection and elimination of wrenches or sealants during installation.

• Bi-directional thermal expansion valve.

• CXM control features status lights with memory for easy diagnostics.

• Unit Performance Sentinel alerts homeowner of potential performance issues.

•

Circuit breaker protected 75VA control transformer.

• High and low pressure service ports on refrigerant circuit.

• Accurate refrigerant sensing freeze protection.

Factory Quality

• All units are built on our Integrated Process Control Assembly System (IPCS). The IPCS is a unique state of the art manufacturing system that is designed to assure quality of the highest standards of any manufacturer in the water-source industry. Our IPCS system:

- Veriﬁ es that the correct components are being assembled.

Carrier Indoor & Outdoor Split Geothermal Heat Pumps - Rev.: 08/10/05

GT-PX

- Automatically performs special leak tests on all joints.

- Conducts pressure tests.

- Performs highly detailed run test unparalleled in the HVAC industry.

- Automatically disables packaging for a “failed” unit.

- Creates computer database for future service analysis and diagnostics from run test results.

• Heavy gauge galvanized steel cabinets are epoxy powder coated for durable and long-lasting ﬁ nish.

• All refrigerant brazing is done in a nitrogen atmosphere.

• All units are deep evacuated to less than 100 microns prior to refrigerant charging.

• All joints are both helium and halogen leak tested to insure annual leak rate of less than 1/4 ounce.

• Coaxial heat exchanger, refrigerant suction lines and all water lines are fully insulated to eliminate condensation problems in low temperature applications.

• Noise Reduction features include: double isolation mounted compressors, compressor springs, insulated compressor compartment, and interior cabinet insulation using 1/2” coated glass ﬁ ber.

•

Safety features include: high pressure and loss of charge to protect the compressor; condensate overﬂ ow protection; low water temperature limit sensors to safeguard the coaxial heat exchanger and air coil; hot water high limit and low compressor discharge temperature switch provided to shut down the hot water generator when conditions dictate. Fault lockout enables emergency heat and prevents compressor operation until thermostat or circuit breaker has been reset.

Advanced Unit Controls With

Easy Diagnostics And

Unit Protection Sentinel Functions

Options & Accessories

• Optional hot water generator with internally mounted pump.

• Optional cupronickel coaxial heat exchanger.

• Electronic thermostat.

• Closed loop Flow Controller.

• Electronic auto-changeover thermostat with 3stage heat, 2-stage cool and indicator LED’s.

• Hose kits.

Carrier Indoor & Outdoor Split Geothermal Heat Pumps - Rev.: 08/10/05

Puron® HFC 410A Refrigerant

Features and Beneﬁ ts

Three Easy, Lift-out Service Access Panels with Stainless Steel Front Panel

Fully Insulated Water and Refrigerant Lines

Two-Stage Indoor Split

Optional Factory Installed Hot Water Genorator With Internal Pump

Puron® Systems

Brass Swivel Water Connections

Oversized Water Coil

Two-Stage Copeland UltraTech™ Unloading Scroll Compressor

Low Proﬁ le Control Box

Backseating Brass Service Valves with Service Port

Carrier Indoor & Outdoor Split Geothermal Heat Pumps - Rev.: 08/10/05

GT-GS

Application Flexibility

• Eight Capacities 018, 024, 030, 036, 042, 048, and 060.

• Voltage availability in 208-230/60/1.

• Stackable cabinets.

• Extended range operation (20-120°F EWT) and ﬂ ow rates as low as 1.5 gpm per ton.

• Circuit breaker protected loop and hot water gen er a tor pumps.

• Field selectable low temperature cut-out selection setting for well or loop.

• Corner located electrical box for wiring access from two sides.

• Compressor mounting springs “matched” to each compressor for maximum quietness.

• Narrow cabinet for movement through doorways.

• Precharged refrigerant circuit with backseating service valves for quick installation.

Operating Efﬁ ciencies

• ARI/ASHRAE/ISO 13256-1 ratings for heating COP’s, cooling EER’s and low water ﬂ ow rates.

• Operating and temperature range allow shorter loops.

• Optional hot water generator with internal pump generates hot water at considerable savings.

• Rugged, super quiet, and highly efﬁ cient scroll compressors.

• Oversized coaxial tube water to refrigerant heat exchangers operate at low liquid pressure drop.

• Convoluted copper (and optional cupronickel) water tube functions efﬁ ciently at low-ﬂ ow rates and provides freeze-damage resistance.

Service Advantages

• Removable panels-3 for compressor.

• Brass swivel-type water and HWG connections for quick connection and elimination of wrenches or sealants during installation. Solid state digital compressor module provides

• reliable lockout, diagnostic, and time delay functions.

• High side loss-of-charge sensing reduces nuisance low pressure faults.

• LED Fault and status indication with memory for easy diagnostics. Designed for front-access service in tight ap pli ca tions.

•

• High and low pressure service ports in the refrigerant circuit.

• Refrigerant sensing freeze protection for more accurate low temperature cut-out.

Factory Quality

- Veriﬁ es that the correct components are being assembled.

- Automatically performs special leak tests on all joints.

- Conducts pressure tests.

- Performs highly detailed run test unparalleled in the HVAC industry.

Automatically disables packaging for a “failed” unit.

- Creates computer database for future service analysis and diagnostics from run test results.

• Heavy gauge galvanized steel cabinets are epoxy powder coated for durable and long-lasting ﬁ nish.

• All refrigerant brazing is done in a nitrogen atmosphere.

• All units are deep evacuated to less than 100 microns prior to refrigerant charging.

• All joints are both helium and halogen leak tested to insure annual leak rate of less than 1/4 ounce.

• Coaxial heat exchanger, refrigerant suction lines and all water lines are fully insulated to eliminate condensation problems in low temperature applications.

• Noise Reduction features include: double isolation mounted compressors, compressor springs, insulated compressor compartment, and interior cabinet insulation using 1/2” coated glass ﬁ ber. Safety features include: high pressure and loss of

• charge to protect the compressor; condensate overﬂ ow protection; low water temperature limit sensors to safeguard the coaxial heat exchanger and air coil; hot water high limit and low compressor discharge temperature switch provided to shut down the hot water generator when conditions dictate. Fault lockout enables emergency

and prevents compressor operation until

heat thermostat or circuit breaker has been reset.

Carrier Indoor & Outdoor Split Geothermal Heat Pumps - Rev.: 08/10/05

Options & Accessories

• Optional hot water generator with internally mounted pump.

• Optional cupronickel coaxial heat exchanger.

• Wide thermostat selection.

• Closed loop ﬂ ow controller.

• Hose kits.

Features and Beneﬁ ts

Single-Stage Indoor Split

R22 Systems

Epoxy Powder Coat Painted Stackable Cabinet

Digital Controls

Easy Service Access From Three Sides

Fully Insulated Water and Refrigerant Lines

Backseating Brass Service Valves with Service Port

Copeland Scroll Compressors

1” Brass Swivel Water Connections

Carrier Indoor & Outdoor Split Geothermal Heat Pumps - Rev.: 08/10/05

GT-S

What is the GT-S?

Carrier introduced the industry to the ﬁ rst ever “outdoor” geothermal split system with internal pumping for residential applications. We are giving the consumer choices for unit location! The unit may be installed inside or outside, thereby satisfying the requirements of almost any home. When installed outside, the unit may be placed on an existing pad and easily connected to existing electric service. And with this installation option, the ﬂ uid loop remains outside avoiding extensive installation inside the home. The GT-S is geothermal without the hassle.

Why “Paradigm Shift”?

We have deﬁ ned the paradigm shift as follows: to advance a model of technology beyond the familiar. But what do we mean? Essentially, our GT-S is taking traditional geothermal technology a step fur ther by offering a unique split system design suitable for any home. Home owners can now enjoy all the savings of a geothermal system with lower installation costs and less hassle. More importantly, the GT-S is opening up the previously illusive retroﬁ t market. Hence, our slogan “From Air to Water...”. The GT-S is a competitive product designed to shift traditional air source homeowners to the beneﬁ ts of water source geothermal technology.

From the utility perspective, the perfectly embodies what the utility industry has been searching for in geothermal: Lower ﬁ rst cost, simple and easy to service, ﬁ ts traditional dealer practices and broad market appeal especially for retroﬁ t, etc.

GT-S

The niche into more of a mainstream segment.

can pull geothermal out of its high end

GT-S

just about

The GT-S Concept

The

GT-S

provides a unique solution to many of the problems associated with single-package geothermal units. In addition, it substantially reduces overall installed costs and perhaps more importantly, opens up the largely untapped retroﬁ t market (which, for conventional equipment, is over 3 times larger than the new construction market).

In new construction, the over packaged geothermal units: The ﬂ uid loop is kept outside, which keeps large diameter piping, ﬂ ammable antifreezes and ﬂ ushing carts (a large, messy service tool) out of the home. The outdoor compressor means noise and most service activity will remain outside. The indoor air handlers are quiet, require less space and allow less costly ductwork (they don’t have to be side return with canvas collars and plenum lining). Also, a GT-S can utilize a gas furnace as the blower and supplemental heat (dual fuel or add-on) which removes a major consumer barrier in that geothermal has traditionally forced the homeowner to make an all-electric home decision. An add-on application also allows the option of sizing the geothermal component to the cooling load, rather than heating, which may further reduce ﬁ rst

GT-S

costs. The construction segment than geothermal currently captures, even when marketed through existing geothermal dealers.

In the replacement market, the the range of suitable geothermal applications. Current geothermal retroﬁ ts have required a complete change out of all existing equipment, elaborate ductwork modiﬁ cations, complex routing of interior loop ﬂ uid lines including below grade foundation penetrations, upgraded electrical service and unit feeders (110v furnace being changed to 240v heat pump with electric backup), and more. This assumes that a geothermal package unit can even be adapted to ﬁ t into the existing space. This process is expensive and disruptive to the owner (they typically don’t want to change radically from what they have); hence the lack of geothermal retroﬁ ts existing. In contrast, the S

can be installed outside on the same line set and electric service supplying the existing air conditioner or heat pump condensing unit. The loop stays outside. Only the indoor coil might need to be changed on an existing furnace, or possibly the air handler on an older heat pump. The purchase timing could be driven by a ﬁ rst-time central cooling addition; the upgrade replacement of an aging or broken air conditioner, heat pump or furnace; an HVAC change necessitated by a renovation; or an efﬁ ciency upgrade driven by a utility marketing program.

should be able to tap a larger new

GT-S

offers many beneﬁ ts

GT-S

greatly expands

GT-

Carrier Indoor & Outdoor Split Geothermal Heat Pumps - Rev.: 08/10/05

Single-Stage Outdoor Split

R22 Systems

The GT-S does not need to be located outside. It can be placed in garages, carports, basements, crawl spaces, etc. This may be important to some homeowners who may be very concerned about outdoor aesthetics. They also can utilize ground water if placed in an appropriate indoor location. Noise is not a problem as the GT-S is extremely quiet (the box is sealed and insulated). The GT-S also has excellent heating and latent cooling capacities compared with competitive high efﬁ ciency geothermal units. In many cases a GT-S produces the heating

Typical GT-S / Air Handler Installation

Power

Condensing

Unit

Disconnects

Insulated line

set with UV

Paint

output of one size larger competitor unit. And the GT-S is likely to be the highest EER per dollar cost unit available in the geothermal industry today.

The goal for the

GT-S

Series is based upon application ﬂ exibility, efﬁ ciency, reliability and a solid state microprocessor compressor control, producing a reliable, simple product both easy to service and install. Its efﬁ ciency and application ﬂ exibility make it the “Paradigm” of geothermal heat pumps.

Air Handler

TXV “IN” toward

outdoor

condensing Unit

Air Pad

Low Voltage Wiring

PVC Condensate

with vented trap

Typical GT-S / Add-on Coil Installation

TXV “IN” toward outdoor

condensing unit

Power

Condensing

Unit

Disconnects

Insulated line

set with

UV Paint

Fossil Furnace

Return Plenum

Add-On “A” Coil

Air

Temperature

Limit Switch

Return Plenum

Air Pad

Low Voltage Wiring

PVC Condensate

with vented trap

Carrier Indoor & Outdoor Split Geothermal Heat Pumps - Rev.: 08/10/05

GT-S

Application Flexibility

• Eight Capacities 018, 024, 030, 036, 042, 048, and 060.

• Voltage availability in 208-230/60/1.

• Stackable cabinets.

• Extended range operation (20-120°F EWT) and ﬂ ow rates as low as 2.25 gpm per ton (geothermal closed loop operation).

• Circuit breaker protected loop and hot water gen er a tor pumps.

• Field selectable low temperature cut-out selection setting for geothermal closed loop operation.

• Easily accessible electrical box for wiring.

• Weather-resistent cabinet.

Internally-mounted (ﬁ eld installed) Flow Controller

•

• Precharged refrigerant circuit with backseating service valves for quick installation.

Operating Efﬁ ciencies

• ARI/ASHRAE/ISO 13256-1 ratings for heating COP’s, cooling EER’s and low water ﬂ ow rates.

• Operating and temperature range allow shorter loops.

• Optional remoted-mounted hot water generator with internal pump generates hot water at considerable savings.

• Rugged, super quiet, and highly efﬁ cient scroll compressors (rotary for size 018).

• Oversized coaxial tube water to refrigerant heat exchangers operate at low liquid pressure drop.

• Convoluted copper (and optional cupronickel) water tube functions efﬁ ciently at low-ﬂ ow rates and provides freeze-damage resistance.

Service Advantages

• Removable side and top panels for easy access to water/refrigerant circuits.

• Low ambient temperature switch activates loop pump in extreme temperatures. Solid state digital compressor module provides

• reliable lockout, diagnostic, and time delay functions.

• High side loss-of-charge sensing reduces nuisance low pressure faults.

• LED Fault and status indication with memory for easy diagnostics.

Carrier Indoor & Outdoor Split Geothermal Heat Pumps - Rev.: 08/10/05

• High and low pressure service ports in the refrigerant circuit.

• Refrigerant sensing freeze protection for more accurate low temperature cut-out.

Factory Quality

- Veriﬁ es that the correct components are being assembled.

- Automatically performs special leak tests on all joints.

- Conducts pressure tests.

- Performs highly detailed run test unparalleled in the HVAC industry.

Automatically disables packaging for a “failed” unit.

- Creates computer database for future service analysis and diagnostics from run test results.

• Heavy gauge galvanized steel cabinets are epoxy powder coated for durable and long-lasting ﬁ nish.

• All refrigerant brazing is done in a nitrogen atmosphere.

• All units are deep evacuated to less than 100 microns prior to refrigerant charging.

• All joints are both helium and halogen leak tested to insure annual leak rate of less than 1/4 ounce.

• Coaxial heat exchanger, refrigerant suction lines and all water lines are fully insulated to eliminate condensation problems in low temperature applications.

Options & Accessories

• Optional remote-mounted hot water generator with internally mounted pump.

• Optional cupronickel coaxial heat exchanger.

• Wide thermostat selection.

• Closed loop ﬂ ow controller.

Features and Beneﬁ ts

Single-Stage Outdoor Split

R22 Systems

Powder Coated Galvanized Heavy Gauge Steel

Insulated Weather Resistant Cabinet

Internally Mounted Flow Controller

Copeland Scroll Compressor (Rotary in 018)

Digital Controls

Hot Water Generator Ready

Integral Carrying Handles

BackSeating Brass Service Valves with Service port

Carrier Indoor & Outdoor Split Geothermal Heat Pumps - Rev.: 08/10/05

Carrier

ARI/ISO/ASHRAE 13256-1

GT-PX (50YDS) Performance Data - English (IP) Units

ARI/ISO/ASHRAE 13256-1 English (IP) Units

Water Loop Heat Pump Ground Water Heat Pump Ground Loop Heat Pump

Model Load

026 Full 24,700 15.0 31,400 5.3 28,600 23.2 25,600 4.7 26,400 18.0 19,500 3.9

026 Part 18,300 16.3 24,300 5.4 22,000 29.4 19,200 4.6 20,800 24.5 16,600 4.1

038 Full 35,900 14.8 44,700 5.0 40,100 21.4 35,900 4.5 37,300 16.7 27,000 3.8

038 Part 24,400 16.5 30,300 5.6 28,000 27.1 24,400 4.6 27,100 23.7 21,400 4.1

049 Full 48,100 14.6 59,400 5.2 53,900 20.9 47,700 4.6 50,200 16.6 37,200 4.0

049 Part 33,300 16.0 42,000 5.4 38,700 26.8 33,800 4.7 37,000 22.8 29,900 4.2

064 Full 56,900 14.5 74,000 4.7 63,800 19.2 58,800 4.3 59,500 15.3 45,700 3.6

064 Part 40,800 15.8 52,700 5.2 46,000 25.7 42,300 4.4 44,800 22.2 37,500 4.0

Cooling 86°F Heating 68°F Cooling 59°F Heating 50°F Cooling 77°F Heating 32°F

Capacity

Btuh

Btuh/W

EER

Capacity

Btuh

COP

Capacity

Btuh

EER

Btuh/W

Capacity

Btuh

COP

Capacity

Btuh

EER

Btuh/W

Capacity

Btuh

COP

GT-PX (50YDS) Performance Data - Metric (SI) Units

ARI/ISO/ASHRAE 13256-1 Metric (SI) Units

Water Loop Heat Pump Ground Water Heat Pump Ground Loop Heat Pump

Model Load

026 Full 7,239 4.4 9,203 5.3 8,382 6.8 7,503 4.7 7,737 5.3 5,715 3.9

026 Part 5,363 4.8 7,122 5.4 6,448 8.6 5,627 4.6 6,096 7.2 4,865 4.1

038 Full 10,522 4.3 13,101 5.0 11,753 6.3 10,522 4.5 10,932 4.9 7,913 3.8

038 Part 7,151 4.8 8,880 5.6 8,206 7.9 7,151 4.6 7,943 6.9 6,272 4.1

049 Full 14,097 4.3 17,409 5.2 15,797 6.1 13,980 4.6 14,713 4.9 10,903 4.0

049 Part 9,760 4.7 12,309 5.4 11,342 7.9 9,906 4.7 10,844 6.7 8,763 4.2

064 Full 16,676 4.2 21,688 4.7 18,699 5.6 17,233 4.3 17,438 4.5 13,394 3.6

064 Part 11,958 4.6 15,445 5.2 13,482 7.5 12,397 4.4 13,130 6.5 10,991 4.0

Cooling capacities based upon 80.6°F DB, 66.2°F WB entering air temperature. Heating capacities based upon 68°F DB, 59°F WB entering air temperature. All ratings based upon 208V operation.

Cooling 30°C Heating 20°C Cooling 15°C Heating 10°C Cooling 25°C Heating 0°C

Capacity

Watts

EER W/W

Capacity

Watts

COP

Capacity

Watts

EER W/W

Capacity

Watts

COP

Capacity

Watts

EER W/W

Capacity

Watts

COP

Carrier Indoor & Outdoor Split Geothermal Heat Pumps - Rev.: 08/10/05

Indoor & Outdoor Split

ARI/ISO/ASHRAE 13256-1

GT-GS (50YCS) & GT-S (38WQS) Performance Data - English (IP) Units

Water Loop Heat Pump Ground Water Heat Pump Ground Loop Heat Pump

Model

018 16,600 14.4 20,300 4.8 18,500 22.1 15,500 4.0 17,800 16.2 12,800 3.5

024 23,500 14.5 29,300 4.7 25,700 20.6 22,800 3.9 25,200 16.6 18,600 3.5

030 28,000 14.7 34,000 4.7 30,200 20.8 26,400 3.9 29,800 16.4 21,500 3.5

036 32,800 14.5 39,200 4.4 34,900 20.1 31,900 3.9 34,700 15.9 25,900 3.3

042 39,800 14.1 48,300 4.7 44,100 19.7 37,800 3.9 42,000 15.5 31,700 3.6

048 44,500 14.2 52,500 4.8 47,500 19.3 42,000 3.9 47,400 15.9 35,800 3.6

060 55,100 13.0 72,700 4.6 57,800 17.2 57,100 3.7 57,600 14.2 47,200 3.5

Cooling capacities based upon 80.6°F DB, 66.2°F WB entering air temperature. Heating capacities based upon 68°F DB, 59°F WB entering air temperature. All ratings based upon 208V operation.

Cooling 86°F Heating 68°F Cooling 59°F Heating 50°F Cooling 77°F Heating 32°F

Capacity

Btuh

Btuh/W

EER

Capacity

Btuh

COP

Capacity

Btuh

EER

Btuh/W

Capacity

Geothermal Comfort Systems

Capacity

Btuh

COP

Btuh

EER

Btuh/W

Capacity

Btuh

COP

GT-GS (50YCS) & GT-S (38WQS) Performance Data - Metric (SI) Units

Water Loop Heat Pump Ground Water Heat Pump Ground Loop Heat Pump

Model

018 4,865 4.2 5,950 4.8 5,422 6.5 4,543 4.0 5,217 4.7 3,751 3.5

024 6,887 4.2 8,587 4.7 7,532 6.0 6,682 3.9 7.386 4.9 5,451 3.5

030 8,206 4.3 9,965 4.7 8,851 6.1 7,737 3.9 8.734 4.8 6,301 3.5

036 9,613 4.2 11,489 4.4 10,229 5.9 9,349 3.9 10,170 4.7 7,591 3.3

042 11,665 4.1 14,156 4.7 12,925 5.8 11,079 3.9 12,309 4.5 9,291 3.6

048 13,042 4.2 15,387 4.8 13,921 5.7 12,309 3.9 13,892 4.7 10,492 3.6

060 16,149 3.8 21,307 4.6 16,940 5.0 16,735 3.7 16,882 4.2 13,834 3.5

Cooling capacities based upon 80.6°F DB, 66.2°F WB entering air temperature. Heating capacities based upon 68°F DB, 59°F WB entering air temperature. All ratings based upon 208V operation.

Cooling 30°C Heating 20°C Cooling 15°C Heating 10°C Cooling 25°C Heating 0°C

Capacity

Watts

EER

W/W

Capacity

Watts

COP

Capacity

Watts

EER

W/W

Capacity

Watts

COP

Capacity

Watts

EER

W/W

Capacity

Watts

COP

Carrier Indoor & Outdoor Split Geothermal Heat Pumps - Rev.: 08/10/05

+ 39 hidden pages