Page 14 of 32 OM 750
Transition (UVC Mode = Cool)
into OR
Super State (UVC Mode = Auto AND Space Temperature = Warm)
Operation When the Cool mode super state becomes active, the
within UVC will automatically determine which UVC state
Super State to
make active, Econ [3], Econ Mech [1], Mech [2],
DA Heat [4], Low Limit [15], Cant Cool [12], or
ActiveDehum [6] based upon the transitions for each
of those states. If the space temperature drops below
EHS, and the Emergency Heat function is enabled, the
UVC will be forced into the Emergency Heat mode
(see Emergency Heat Mode).
The UVC will remain in this super state until one of
the transition out conditions become true.
Transition (UVC Mode ≠ Cool AND UVC Mode ≠ Auto)
of out OR
Super State (UVC Mode = Auto AND Space Temp = Cold AND
Mech PI = Saturated Low AND Econ PI = Saturated
Low)
Figure 13. Cool Mode Super State Diagram
COOL MODE (SUPER STATE)
When in Cool mode the UVC will use primary cooling (economizer)
and secondary cooling (mechanical, DX) as needed to maintain the
effective cooling setpoint (see Space Temperature Setpoints). The LUI
or a network connection can be used to force the unit into the Cool
mode. Additionally, the UVC when set to Auto mode can automatically
force the unit into the Cool mode. When the UVC is in Auto mode, it
is “normal” for the UVC to “idle” in Cool mode when there is no need
to switch to another mode. The Cool mode super state consists of seven
UVC states: Econ [3], Econ Mech [1], Mech [2], DA Heat [4], Low
Limit [F], Cant Cool [C], and Active Dehum [6] (optional).
“For Reheat
type units”
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