Manual code 75803707A.0708
Page 45 of 64
9.2 DIRECT EXPANSION TWIN SOURCES
The “Direct Expansion Twin Sources” system installed on OCA…/TS - UCA…?/TS conditioners consists of an
additional cold water coil, integrated in the machine’s finned evaporator coil pack, and a 3-way modulating valve
controlled by the microprocessor control.
With this operating system, the compressors do not start as long as the cooling capacity of the chilled water
system remains available. The direct expansion circuit is activated automatically in the event of an emergency, when the
chilled water system is at the limit of its capacity or is out of service.
The same system can also be used as the primary source of cooling for the direct expansion circuit and, in an
emergency, as the water coil connected to the drinking water supply, with an operation similar to that previously
described.
The Twin Sources system is configured by Tecnair LV during machine testing, on the request of the customer.
9.2.1 DIRECT EXPANSION - WATER TWIN SOURCES(OCA…?/TS - UCA…/TS)
9.2.2 WATER - DIRECT EXPANSION TWIN SOURCES(OCA…/TS - UCA…/TS)
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