Installation and User Manual. Version V03.B03_EN (23/09/2015)
ecoGEO
147
ECOFOREST Geotermia
OPERATION
DHW Mode. Whenever DHW is demanded, the heat pump delivers hot water into the DHW inter-buffer
heating coil until the temperature set point is reached. In ecoGEO B1, B2, C1 and C2 models the hot
water flow from the condenser is diverted to the inter-buffer heating coil through the 3-way valve
heating/DHW. In ecoGEO B3 and C3 models the CHW system (Closed Hot Water production system) is
activated and it allows the simultaneous supply of DHW and climate control. The heat pump always
gives priority to DHW supply over other demands.
HEATING Mode. The heat pump directly delivers hot water to the heating system Zone 1 (high
temperature zone) depending on demand. Zone 2 supply temperature (low temperature zone) is
obtained mixing the heat pump supply flow with the return flow of the low temperature release system
through the external shunt group. Supply temperatures to both zones are optimized according to outdoor
and indoor temperatures and the configuration of values in the climate control. In case there is only a
heating demand in Zone 2, the valve in Zone 1 will close to avoid water circulation in this zone and the
heat pump will deliver directly to the set temperature in Zone 2 to optimize its efficiency. In case of
exclusive demand of heating in Zone 1, the 3-way valve of the external shunt group closes the flow
circulation in Zone 2 (position 100% bypass). Circulation pumps control the temperature range in supply
and return in the brine and heating-cooling circuits between 3 and 5 ºC, respectively.
FREE COOLING Mode (ecoGEO B2 models). The compressor turns off, the circulation pumps are 100%
active and heating-cooling and brine circuits are diverted to the free cooling heat exchanger. Thus, the
equipment directly pumps out cool water obtained through the thermal exchange with the antifreeze
mixture of the brine system.
ACTIVE COOLING Mode (only ecoGEO B3 models). The heat pump reverses its operational cycle, so
that it directly pumps out cold water to Zone 1 (low temperature zone) of the climate control system. The
supply temperature in Zone 2 (high temperature zone) is reached mixing the heat pump supply flow with
the return flow of the low temperature release system through the external shunt group. The temperature
set value of supply depends on the release system used in each zone. Circulation pumps control the
temperature range in supply and return in the brine and heating-cooling circuits between 3 and ºC,
respectively.
LEGIONELLA PROTECTION Mode. If the LEGIONELLA PROTECTION mode is enabled, one a week,
on the date and time set, the anti-legionella resistance placed in the DHW tank will be activated to
increase its temperature up to 70 ºC in order to avoid legionella contamination.
EXTERNAL CONTROL ELEMENTS
In addition to the own control equipments of the heat pump, it is necessary the installation of the
following components (see section 7).
An indoor th-Tune climate terminal to control Zone 1 (only in case the heat pump control is done
through a th-Tune terminal). Supplied with the heat pump.
An indoor th-Tune climate terminal to control Zone 2 (only in case the heat pump control is done
through a th-Tune terminal).
One or more relay type thermostats for indoor temperature control in Zone 1 (only in case the
heat pump control is done through a signal from the relay type thermostats).
One or more relay type thermostats for indoor temperature control in Zone 2 (only in case the
heat pump control is done through a signal from the relay type thermostats).
A temperature probe for outdoor temperature. Supplied with the heat pump.
A temperature probe for supply in Zone 2.
An external shunt group (pump + 0-10 Vdc 3-way modulating valve).
