Carrier GT-S, GT-PX, GT-G specifications Equipment Selection, General

Carrier Equipment Selection

The installation of geothermal heat pump units and all associated components, parts, and accessories which make up the installation shall be in accordance with the regulations of ALL authorities having jurisdiction and MUST conform to all applicable codes. It is the responsibility of the installing contractor to determine and comply with ALL applicable codes and regulations.

General

Proper indoor coil selection is critical to system efficiency. Using an older-model coil can affect efficiency and may not provide the customer with rated or advertised EER and COP. Coil design and technology have dramatically improved operating efficiency and capacity in the past 20 years. Homeowners using an older coil are not reaping these cost savings and comfort benefits. NEVER MATCH AN R-22 INDOOR COIL WITH AN R-410A

COMPRESSOR SECTION.

Newer indoor coils have a larger surface area, enhanced fin design, and grooved tubing. These features provide a larger area for heat transfer, improving efficiency and expanding capacity. Typical older coils may only have one-third to one-half the face area of these redesigned coils.

Indoor Coil Selection - GT-PX (50YDS) Puron® Geothermal Split System

Geothermal split system heat pumps are rated in the ARI directory with a specific indoor coil match. GT- PX Puron split system (50YDS) models are rated with Carrier/Bryant FV4 or FE4 series variable speed air handlers as shown in Table 1a. Other combinations (e.g. variable speed furnace with cased coil) may attain the same ARI ratings providing that the specifications meet or exceed those listed in Table 1a AND Table

1b. An ECM motor and TXV is required. Cap tubes and fixed orifices are not acceptable. PSC fans may be used if matched to Table 1b, but will not meet ARI ratings. If using PSC fan, compressor section must be operated as a single stage unit (i.e. wired for either 1st stage or 2nd stage). Without the ability to vary the airflow, supply air temperatures may not be acceptable if the compressor is allowed to change stages when used with a PSC fan motor.

GTTable-PX1a:AirGTHandler-PX (50YDS)MatchesPuron®for ARIGeothermalRatings Split System Air Handler Matches for ARI Ratings

Compressor Section	026	038	049	064
Air Handler	003	005	006	006
Model FV4 or FE4
Refrigerant		R-410A
Metering Device		TXV (required)
Air Coil
Type	Slope	A	A	A
Rows - Fins/in.	3 - 14.5	3 - 14.5	3 - 14.5	3 - 14.5
Face Area (sq. ft.)	3.46	5.93	7.42	7.42
Cabinet Configuration	Upflow / Downflow / Horizontal (Multipoise)
ECM Settings for	AC/HP size: 036	AC/HP size: 036	AC/HP size: 048	AC/HP size: 060
	System Type:	System Type:	System Type:	System Type:
ARI Ratings
	Comfort AC/HP	HP-Effic AC/HP	Comfort AC/HP	Comfort AC/HP
(FV4 Fan Coil)
	CFM Adjust: Nom	CFM Adjust: High	CFM Adjust: High	CFM Adjust: High
Fan Motor Type - HP	ECM - 1/2	ECM - 1/2	ECM - 3/4	ECM - 3/4

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