T Therm Geo TST-*** Installation & Operating Instructions Manual - page 3
12/03/2012
1
GI301
Introduction
Geothermal heat pumps are able to heat and cool spaces with efficiencies exceeding 350% by taking advantage
of solar heat stored in the earth’s crust and the earth’s relatively stable temperatures. In the winter time, heat is
moved from the earth into the home and concentrated using a refrigeration system. Since the heat already exists
in the soil, the cost of operation of the geothermal heat pump is, in effect transportation cost for the free heat. In
the summer, heat is removed from the home by reversing the refrigeration process and sending heat back out
into the earth. A geothermal system consists of an earth source (either open loop or earth loop heat exchanger),
a geothermal heat pump containing the refrigeration system and a ductwork system for delivering the
conditioned air to the individual rooms. To learn more about geothermal heating, please visit our web site at
www.tthermgeo.com
This is a pre-wired package for converting a new or existing oil or gas furnace into a dual heat system. This is a
complete package for both heating and air conditioning, utility load control, and compatible with DC drive
variable speed furnaces. The GEO Logic control uses a standard, multi-wire heat pump room thermostat to
initiate and terminate all heat/cool functions. There are various temperature sensors, pressure sensors, water
flow switch, etc. which continuously monitor the heat pump system. The interaction of these sensing
components, room thermostat requests, and the various heat pump refrigeration components are all controlled by
an integrated microprocessor system (GEO Logic). The various setup conditions for this microprocessor based
controller determine the application and geo product series. These setups are initially programmed by the
factory, but special PC software and cable are available for reprogramming as required for controller
replacement and/or other options which may apply to the specific installation. See Additional Equipment
Concerns, Field Setup or Programming, Operation Indicators, User Instructions, Control Sequence, and
Troubleshooting sections within this manual for further details on the GEO Logic control.
The utility load control receiver interfaces with the T2-TT-INT-1 which properly switches the heating mode and
properly controls the air conditioning mode during summer load interrupt. The blower circuit and control is also
designed for heating interrupt (blower handled by gas furnace only) and continuous operating blower during
cooling peak load interrupt. Typically these controls and design features are only found in this product.
Moving and Storage
Units should be stored in original packaging in a clean dry area. Store and move units in normal upright
position. Do not stack units. Transport in vertical position only.
Initial Inspection
Be certain to inspect all cartons and crates as units are received before signing the freight bill. Verify that all
items received have no physical damage. Report any damages or shortages on the freight bill. The purchaser is
responsible for filing the necessary claims with the carrier. Concealed or hidden damages not discovered until
removing packaging must be reported to the carrier within 15 days of receipt.
Unit Location and Mounting
Locate the unit in an indoor area where the ambient temperature will remain above 45°F [8°C]. TTHERM GEO
Heat Pump provides 4 removable panels for ease of servicing.. This unit is zero clearance rated; however, allow
enough room to remove panels for service and maintenance. Suggest setting unit on a sound vibration pad, see
accessories price sheet, part # E2-0122. Water supply should not be hard plumbed directly with copper or PVC
pipe as this could transfer any vibration to living space. Consider using Hose Kit part # L3-0015B to minimize
transferred vibration.
Please read and understand conditions associated with proper installation, unauthorized changes, and POWER ON
procedures.
Warranty Statement
See the last page of this manual for detailed limited warranty coverage explanation.