Equipment Selection
Air Coil Match-ups
R e s i d e n t i a l S p l i t U n i t s - 6 0 H z P u r o n
®
R e v. : 6 D e c . , 2 0 1 1
6
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 ef
Ä
ciency.
Using an older-model coil can affect ef
Ä
ciency and may
not provide the customer with rated or advertised EER
and COP. Coil design and technology have dramatically
improved operating ef
Ä
ciency and capacity in the past 20
years. Homeowners using an older coil are not reaping these
cost savings and comfort bene
Ä
ts. NEVER MATCH AN R-22
INDOOR COIL WITH A PURON
®
COMPRESSOR SECTION.
Newer indoor coils have a larger surface area, enhanced
Ä
n
design, and grooved tubing. These features provide a larger
area for heat transfer, improving ef
Ä
ciency 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 & GT-PE (50YDS & YPS)
Split system heat pumps are rated in the AHRI directory with
a speci
Ä
c indoor coil match. GT-PX and GT-PE models are
rated with Carrier/Bryant FV4 or FE4 series variable speed
air handlers as shown in Table 1a. Other brands of air
handlers may attain the same AHRI ratings providing that the
speci
Ä
cations meet or exceed those listed in Table 1a AND
Table 1b. An ECM motor and TXV is required. Cap tubes
and
Ä
xed ori
Ä
ces are not acceptable. PSC fans may be
used if matched to Table 1c, but will not meet AHRI 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 air
Å
ow, supply air
temperatures may not be acceptable if the compressor is
allowed to change stages when used with a PSC fan motor.
Table 1a: GT-PX & GT-PE Carrier/Bryant Air Handler Matches for AHRI Ratings
Compressor Section
026
038
049
064
Air Handler
Model FV4
003
005
006
006
Refrigerant
Puron
®
Metering Device
TXV (required)
Air Coil
Type
Rows - Fins/in.
Face Area (sq. ft.)
Slope
3 - 14.5
3.46
A
3 - 14.5
5.93
A
3 - 14.5
7.42
A
3 - 14.5
7.42
Cabinet Con
Ä
gura-
tion
Up
Å
ow/Down
Å
ow/Horizontal (Multipoise)
ECM Settings for
AHRI Ratings
(FV4 Fan Coil)
AC/HP size: 036
System Type:
Comfort AC/HP
CFM Adjust: Nom
AC/HP size: 036
System Type:
HP-Ef
Ä
c AC/HP
CFM Adjust: High
AC/HP size: 048
System Type:
Comfort AC/HP
CFM Adjust: High
AC/HP size: 060
System Type:
Comfort AC/HP
CFM Adjust: High
Fan Motor Type - HP
ECM - 1/2
ECM - 1/2
ECM - 3/4
ECM - 3/4