The Bard Geo-Trio™ Geothermal/Water Source
Heat Pump delivers economical year-round
comfort by utilizing nature’s most abundant and
efficient solar energy collector – the earth. The
Geo-Trio™ Series heat pumps are designed for
low water flow rates and offer cooling efficiencies
up to 29.1 EER and heating efficiencies up to 4.8
COP on ground water, and cooling efficiencies up
to 24.9 EER and heating efficiencies up to 4.4
COP on ground loop.
All units are shipped prewired for fast, easy
installation in residential or commercial buildings.
Engineered Features
Steel Cabinet:
Galvanized 20 gauge zinc coated steel
cabinet with baked-on, textured enamel
which allows it to withstand 1000 hours of
salt spray exposure.
Multi-Capacity Two-Stage:
Simple thermostatic control seamlessly
stages the compressor and indoor airflow
rate between full and part load capacity
operation without cycling the compressor.
This helps to maximize comfort, humidity
control, energy efficiency and overall
reduction in compressor cycling for
improved system life.
Step Capacity Compressor:
Copeland step-capacity (2-stage) scroll
compressors are designed for increased
efficiency, quieter operation and improved
reliability for longer life.
R-410A Refrigerant:
Designed with R-410A (HFC) non-ozone
depleting refrigerant in compliance with the
Montreal protocol and 2010 EPA requirements.
Liquid Line Drier:
Protects system against moisture.
Thermostatic Expansion Valve:
For wide range refrigerant control
(2-way operation).
High Pressure Switch:
Provides additional protection for the system.
Low Pressure Switch:
Two switches provided. Factory wired
switch is for ground water applications,
alternate switch is field connected for
ground loop applications.
Control Panel:
Mid-level for easy access. Blower section
includes transformer and blower control.
High Efficiency Coaxial Water Coil in
either Copper or Cupronickel
Water to refrigerant coil is completely
insulated to prevent frost build-up at low
temperature operation.
TYPICAL INSTALLATION APPLICATIONS
Compressor, Blower and A Coil Sections stack
vertically for upflow and counterflow
installations. Blower and A Coil Sections can
be remotely mounted in attics or crawl spaces
providing horizontal right or left opportunities.
Indoor Air Coil:
Grooved copper tubing and enhanced
louvered aluminum fin for maximum heat
transfer and energy efficiency.
Coil coating is black E-Coat electrostatic
coating on complete coil.
Cased Indoor Air Coils for Fossil Fuel
(Dual Fuel):
Insulated cased coils to fit standard 17.5"
and 21" width furnaces.
Lockout Circuit:
Built-in lockout circuit resets from the room
thermostat. Provides commercial quality
protection to the compressor.
Variable Speed ECM Blower Motor:
• High Efficiency
• Soft starting - low noise on start up
• Continuous fan - will operate at 50%
of rated Stage 2 airflow
Mild Weather Operation:
Part Load Cooling Operation will operate at
20% reduced airflow for the first 5 minutes
of operation. This results in 32% increased
applied moisture removal during this 5minute period, and helps humidity control
during short-run conditions. This is
seamlessly controlled internal of the unit
controls with no required user intervention.
Water Connections:
All water connections on outside of
cabinet. Brass full swivel double o-ring
connection with 1" full flow ports.
Refrigerant Connections:
Special self-sealing fittings are used with 3'
line set for stacked upflow or downflow
applications, and line sets up to 50'
available for horizontal or dual-fuel
applications.
Service Access Ports:
Permits service pressure check of
discharge and suction pressures.
Filter Rack (Optional):
Accessory kit with 1" filter (reversible for left or
right side access for upflow installations).
Accessory Electric Duct Heater Option:
5, 10, 15 and 20KW nominal size. Field
installed external to unit. For upflow and
horizontal duct installation only.
Optional Accessories:
Room thermostat - Water accessory kit Waterflow controls.
Domestic Hot Water Heat Exchanger System:
Double wall vented heat exchanger and pump
with ECM motor and operating controls,
factory installed on all 1-phase models.
Hot Water Heating Performance and
Operating Cost Savings: The actual amount
of hot water (gallons of hot water per day)
generated and resultant operating cost
savings can vary greatly because of several
factors: heat pump system size, hours per day
of operation of the heat pump, mode of
operation (cooling vs. heating), hot water
usage patterns, heat pump water supply
system (ground water, ground or pond loop,
etc.), and climatic conditions. The gallons of
hot water per day are dependent upon the
above variables, and in general can range up
to 125 gallons per day for a nominal 24,000
BTU heat pump system, and up to 375
gallons per day for a nominal 60,000 BTU
heat pump system in the cooling mode,
offering a 100% energy savings over
conventional electric water heaters. During
the winter months when the heat pump is
operating in the heating mode, less hot water
is available, but at the same time, the electric
water heater will consume less electricity.
Form No.S3423-1112
SupersedesS3423-912
Page1 of 28
Geo-Trio™ GT*-Series Geothermal / Water Source Heat Pump Nomenclature
.
"A" Coil Section
GTA3600UD1AA
Geo-Trio
"A" = Coil Section
3600 (3 Ton)
4860 (4 & 5 Ton)
Series
Revision
Level
A = Black ECoated Coils
Option
Blower Section
GTB1–A
Geo-Trio
B = Blower
Section
Revision
Level
Option
A = 230 Volt 1-Phase
Compressor Section
GTC36S1–ADCX
Geo-Trio
C = Compressor
Section
Nominal Capacity
36 = 36K
48 = 48K
60 = 60K
S = Step Capacity
Revision
Level
Option
A = 230 Volt 1-Phase
D = Desuperheater
C = Copper Coil
N = Cupronickel Coil
X = Future
Use
Fossil Fuel “A” Coil Section (For Use on Hi-Boy, Lo-Boy & Counterflow Gas or Oil Furnaces in place of GTA Coil)
GTADP–3642–B
Geo-Trio
A= Coil Manufactuer
ADP = Advanced Distributor Products
3642 (3 Ton)
4860 (4 & 5 Ton)
B = 17.50" Wide Furnace
C = 21.00" Wide Furnace
Cross-Reference Table
Shipping Weights - GT Series
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Form No.S3423-1112
SupersedesS3423-912
Page2 of 28
1Motor will automatically step through the various airflows with thermostatic control
2ESP = External Static Pressure (inches of water)
3Maximum allowable duct static
4Continuous airflow is the CFM being circulated with manual fan operation without any additional function occurring.
5Will occur automatically for first 5 minutes of Part Load Cooling Operation.
6Will occur automatically after five minutes of Part Load Cooling Operation.
7Will occur automatically with control signal input.
NOTE: All values can be changed + 10% via the + adjustment dip switches on the tap select control inclusive in the GTB1-A
Blower Section (see Airflow Corrections for performance impact).
55555
NOTE: This applies only if blower section is remote mounted
from compressor section. When blower section is coupled
deepSelbairaV4/3
directly to compressor section, the blower is powered from the
compressor section.
+75°C copper wire ++ HACR type circuit breaker
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Form No.S3423-1112
SupersedesS3423-912
Page3 of 28
Ratings Based on Approved Compressor, GTA-Coil & Blower Combinations
ISO Standard 13256-1:1998, “Water to Air and Brine to Air Heat Pumps”, which includes watt allowance for water pumping.
Cooling capacity based on 80.6°F DB, 66.2°F WB entering air temperature. Heating capacity based on 68°F DB entering air temperature.
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HUTB
000,24
006,92
005,45
000,04
000,46
000,94
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W/UTB
8.22
5.92
1.02
7.42
0.02
4.72
Approved Compressor and GTA-Coil
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1S63CTGA-1DU0063ATG
1S84CTG
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HUTB
006,72
002,22
004,63
004,03
000,74
005,73
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HUTB
002,33
002,42
005,44
004,33
000,65
000,04
POC
09.3
03.4
06.3
59.3
04.3
09.3
TWE—
F°05
POC
54.4
07.4
02.4
53.4
01.4
53.4
• Intertek ETL Listed to Standard for Safety Heating and Cooling Equipment
ANSI/UL 1995/CSA 22.2 No. 236-05, Third Edition.
PATENT PENDING
See Page 5 for alternate Fossil Fuel A-coil Ratings.
Form No.S3423-1112
SupersedesS3423-912
Page4 of 28
I
C
For Use with Gas or Oil Furnace as Dual Fuel Installation
The GTC Compressor Unit Sections are approved for use with certain 3rd Party A-Coils.
See Below.
All Models are Energy Star qualified for Ground Loop and Ground Water Applications.
Ratings Based on Approved Compressor and Fossil Fuel A-Coil
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NOITCES
LEDOM
1S63CTG
1S84CTG
1S06CTG
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11111
1
1
1
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21
51
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HUTB
000,93
003,82
000,84
000,73
000,95
005,44
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LEDOM
1S63CTG
1S84CTG
1S06CTG
1 See Cross-Reference Chart (Page 2) for approved Bard/ADP Coil part numbers.
Charge must be adjusted when using a Fossil Fuel A-Coil. See Installation Manual.
A coil spacer with a minimum height of 6" must be used on all Oil Furnaces to protect the coil drain pan and ensure even airflow across the coil.
GTLS-SK2-1 Line Set Stub Kit is required for installation to make connections to the GTC Compressor Section.
Loop Pump Modules and Pump Outputs for Ground Loop Installations 1
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79215161
1-CFROD15.825.72525.2222
2-CFROD27555055444
1 Pump output (feet of head) @ GPM at top of column.
MPGNIDERIUQERETARWOLFRETAW
Antifreeze Percentages by Volume for Ground Loop Installations 1
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)C°2.21-(F°01)C°4.9-(F°51)C°7.6-(F°02)C°9.3-(F°52
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lonahtE2%92%52%02%41
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1 Loop antifreeze protection must be determined based on loop design and geographic location.
2 Must not be denatured with any petroleum based product.
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Form No.S3423-1112
SupersedesS3423-912
Page5 of 28