CTC Union EcoComfort Installation And Maintenance Manual page 22

Passive cooling unit
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Cooling capacity
Passive cooling is a cost-effective way to take advantage of the cooler
temperature in the bedrock in the summer. How much you can cool a
property is dependent on several factors, such as the bedrock temperature
currently available, house size, capacity of the underfloor heating/fan coil
units, lay-out (fan coils), etc.
Yet a drop of a few degrees in a warm house often feels much more
comfortable. Often the capacity (cooling) is reduced during the latter part of
the summer as the bore hole heats up.
Desired room temperature
The desired room temperature is set on the controlling product's display.
The automated control system "mixes" to the right temperature in relation
to the need for cooling (room sensor difference). The greater the difference,
the colder the water that goes to the system. Depending on the system,
excessively cold temperatures (which can result in damp damage) are not
permitted.
NOTE! The recommended room temperature setting when cooling is a few
degrees higher than the temperature set in heating mode. Since the room
temperature tends to rise when the outdoor temperature is increasing, the
cooling function takes effect.
Also note that the cooling capacity depends on factors such as the bore hole
temperature, bore hole length, flows and the underfloor heating/fan coil unit
capacity, and will vary during the warm season.
Automatic heating-cooling function
Once the settings have been made, operation is fully automatic. The control
system automatically ensures that the property is heated when there is a
need for heating and cooled when there is a need for cooling without the
systems "fighting" each other.
Automatic running of pump and mixing valve
The pump and mixing valve built into CTC EcoComfort are run regularly to
prevent them seizing up.
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CTC EcoComfort

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