Secant Cardio IIe Dokumentacja Pobierz pdf (Strona 45)

Schematics

5) HVAC setback

This type of temperature control system uses the relay labels « Heat », « Cool » and « Fan ».

Heat This relay is closed to control the temperature in economy mode

Cool This relay is closed to control the cooling

Fan This relay is closed during the cooling control process

In setback mode (economy)

When the ambient temperature is lower than the set point, the « Heat »relay is closed.

In normal mode (comfort)

The « Heat » relay is always closed, the temperature control is monitored by the thermostat

In all modes

When the ambient temperature is higher than the cooling set point, the « Cool » relay is activated.

Connection schematic HVAC setback

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Secant Cardio IIe Dokumentacja Strona 45