R e s i d e n t i a l Tr a n q u i l i t y
®
2 7 S p l i t ( T T S ) - 6 0 H z H F C - 4 1 0 A
R e v. : 8 M a y, 2 0 1 4 C
6
G e o t h e r m a l H e a t i n g a n d C o o l i n g
Equipment Selection
Air Coil Match-ups
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 e
ffi
ciency.
Using an older-model coil can a
ff
ect e
ffi
ciency and may
not provide the customer with rated or advertised EER
and COP. Coil design and technology have dramatically
improved operating e
ffi
ciency and capacity in the past 20
years. Homeowners using an older coil are not reaping these
cost savings and comfort bene
fi
ts. NEVER MATCH AN R-22
INDOOR COIL WITH AN HFC-410A COMPRESSOR SECTION.
Newer indoor coils have a larger surface area, enhanced
fi
n
design, and grooved tubing. These features provide a larger
area for heat transfer, improving e
ffi
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 - Tranquility
®
27 (TTS)
ClimateMaster split system heat pumps are rated in the
AHRI directory with a speci
fi
c indoor coil match.
Tranquility
27 Splits are AHRI rated and listed with Tranquility TAH
air handlers and TAC cased coils. Other brands of air
handlers may attain proper performance and capacity
but will not be AHRI or Energy Star listed so will not
qualify for all utility rebates and tax credits, specifi cally
the Federal Energy Tax Credit for Geothermal Property
will not be available. Unlisted systems eligibility must
be determined by the system installer on a case by case
basis.
Other brands of air handlers may attain the same
AHRI performance providing that the speci
fi
cations meet
or exceed those listed in Tables 1, 1a, 1b or 1c. An ECM
motor and TXV is required. Cap tubes and
fi
xed ori
fi
ces
are not acceptable. PSC fans may be used if matched to
Table 1c, but will not meet AHRI performance. 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
fl
ow, supply air temperatures may not
be acceptable if the compressor is allowed to change stages
when used with a PSC fan motor.
Table 1: Tranquility
®
27 Air Handler Matches for AHRI Ratings
Compressor Section
026
038
049
064
Air Handler
Model TAH
026
038
049
064
Refrigerant
HFC-410A
Metering Device
TXV (required)
Air Coil
Type
Rows
Dimensions
A
2
14 x 17
A
2
24 x 17
A
2
24 x 17
A
3
24 x 17
Cabinet Con
fi
guration
Up
fl
ow/Down
fl
ow/Horizontal (Multipoise)
Fan Motor Type - HP
ECM - 1/2
ECM - 1/2
ECM - 1
ECM - 1
