Terminal Control Units
The Terminal Control Unit
is a versatile, microprocessor-based, direct digital controller
that allows existing Variable Air Volume (VAV) systems to be upgraded
to optimal Digital Air Volume (DAV) control. Three modules are
available, with or without auxiliary heat: Single Duct TCU, Series
Fan-Powered TCU, and Parallel Fan-Powered TCU. Completely compatible
with the Carrier Comfort Network, the Terminal Control Unit brings
these key control features to VAV air terminals:
- Pressure- Independent
air flow controls the primary air flow independent of varying
supply air pressures with a performance of +/- 3% of unit maximum
rated CFM flow.
- Space Temperature Control
is maintained at +/-1o F of setpoint through the modulation
of CFM flow.
- BTU totalization of primary
air to the zone identifies energy consumption.
- Demand Limit Control function
will automatically increase or decrease the Temperature Zone Setpoints,
when signaled via the Network Load Shed Module.
- After-Hours Operation
may be initiated via a button on space sensors or from an operators
interface.
- Proportional Integral
Derivative (PID) Control Algorithms ensures increased accuracy
and drift-free control for improved occupant comfort.