TTHERM GEO TVA series, Installation & Operating Instructions Manual

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12/06/2012 1 GI202
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 prewired package system with the necessary controls for various forced air heating applications. 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 plus optional AUX electric element heater 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.
An optional T2-TT-INT-1 plug-in module is available to properly handle other applications with utility load
control, backup furnace, backup boiler, dual fuel, etc. In addition to the compressor and AUX heater, proper
operation of the forced blower and control of the external pumps are also operated with this optional module.
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
provides 3 removable panels for ease of servicing; front (2), right and left bottom. This unit is zero clearance
rated; however, allow enough room to remove panels for service and maintenance. We suggest setting the 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.