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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
Call your distributor for appropriate combinations of GT-
S Split condensing units, air handlers, and coils.
Utilizing the Existing Air Handler or Coil
It is recommended that a new coil or airhandler be
installed with the GT-S due to the low initial cost of the
additional equipment versus the reliability and benefit of
new warranty etc. However, the existing air handler may
be retained and used provided the following:
•
Coil currently uses an orifice or TXV. The orifice
should be removed and a TXV installed according to the
procedure outlined here.
If the coil utilizes capillary
tubes as the expansion system it will not operate properly
with the GT-S system and the coil should be replaced
with a new one.
• The coil should match Table 2 and 3 for square footage,
number of circuits and fin spacing.
• Life expectancy of more than 7 years left in the
components such as fan motors, coil and cabinet.
EQUIPMENT SELECTION
Split System Coil Application Guide
The 50YCS (GT-G)/38WQS (GTR-S) series units have been tested in accordance with
ARI standard 330. Unit performance has been certified with a specific air handler/air
coil. The following is a guideline designed to assist the system designer with matching
these units with air handlers and air coils.
To match these units to an Air Handler/A-coil you will need to base the coil selection
using the following conditions:
ARI
Standard 330-93
DB deg. F
WB deg. F
EWT deg. F
Cooling
80
67
77
Heating
70
60
32
Note:
Design GPM flow rate = 3 gpm/ton
The following table gives the required capacity the Air Handler/A-coil must yield at the
above conditions and the tabulated CFM and Evaporator temperature. Interpolation
maybe required by the designer.
Guidelines for matching coils to Genesis split and Paradigm Units
CFM
Evaporator Deg. F
MBTU Capacity
Carrier Unit
50YCS/38WQS
600
50
18.5 - 21.3
018
800
47
25.5 - 29.3
024
1000
49
31.5 - 36.2
030
1200
48
37.0 - 42.5
036
1400
45
42.2 - 48.5
042
1600
46
50.0 - 57.5
048
1800
45
58.0 - 66.7
060
Note(s):
Split units are designed for use with
12 SEER
or higher rated Heat Pump
Air Handlers/A-coils.
Indoor matching Adjustable TXV's should be used with any Air
Handler/A-coil - See Residential Price & Product Catalog P/N CA166
All Air Handler/A-coil selections MUST use TXV, fixed meter devices are not
acceptable. - See GTR-S/GT-G Split Accessories Page in Catalog P/N CA166
If you are unsure of your selection, you may forward Air Handler/A-coil performance
Model data as provided by the manufacture to your Carrier Distributor/ClimateMaster
Factory Technical Support /Engineering department for assistance. Guidelines subject to
change without notice.
