Danfoss GEO 250 Data sheet
Technical Paper
Geothermal Heating Surface GEO 250
Description
Heating / Cooling
Capacity
Technical Data
The geothermal surface has two functions:
• Winter: preheating the outdoor air to protect
the system from icing up.
• Summer: cooling the outdoor air to freshen up
the inlet air.
The typical air supply temperature will be
14-16°C, depending on the outdoor temperature,
soil conditions for the brine circuit, etc.
The geothermal surface is connected to a buried
ground pipe in which brine (antifreeze) is circulated.
The effect to be achieved with the geothermal
surface depends on a number of variables, e.g.
• type of soil
• height of subsoil water
• laying depth of ground pipe
• how the soil is surrounding the ground pipe
The following example describes guidelines for
laying ground pipe with brine (Antifreeze).
Width 600 mm
Height 335 mm
Depth 250 mm
Weight 6.3 kg
Duct system connector Ø 250 mm
Power consumption 3-10 W
Electrical connection 230 V, 50 Hz
The only power consumption required for this
solution is for the circulation pump.
The surface is supplied fully assembled, incl.
automation, two temperature sensors for duct fitting and the required cables.
Plug’n’play installation - the system recognises
and configures the surface automatically on
connection.
The surface is fitted in the duct system on the
outdoor side.
Prerequisites for ground pipe
• min. depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 m
• center distance . . . . . . . . . . . . . . . . . . . . . . . . . . .1 m
• length for a2/w2 unit. . . . . . . . . . . . . . . . 120-150 m
• length for a3 unit . . . . . . . . . . . . . . . . . . . 160-200 m
Under conditions as mentioned, an output of
approx. 15W/m2 = 15W/m is to be expected (rule
of thumb).
Ordering
Code no . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 089F0354
VFFKB102 © Danfoss 10/2010
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