Cool Mode (Super State) - Daikin MicroTech Operation And Maintenance

Cool Mode (Super State)

When in Cool mode the UVC uses primary cooling
(economizer) and secondary cooling (mechanical, hydronic)
as needed to maintain the effective DATS (see "Effective
Setpoint Calculations" on page 31). The keypad/display or
network connection can be used to force the unit into the Cool
mode. The Cool mode super state consists of the following
UVC states: CompCool#1, CompCool#2, EconComp#1,
EconComp#2, Water Cool, Air Econo Water, Air Econo,
Reheat, Reheat Low Limit, and Can't Cool.
Figure 12: Cool Mode Super State Diagram
Enter from:
LUI Input
Network Input
Auto Mode
Cool
Mode
Continually
Check Input
IAT, DAT, OAT
Econ avail.
Mech cool avail.
OM 1280-2 • MICROTECH UNIT CONTROLLER
Economizer
Yes
available?
No
No
Compressor/Water
Mode
Are inputs
No
valid?
Yes
Continue in
current mode
When the Cool mode super state becomes active, the UVC will
automatically determine which UVC state to make active based
upon the transitions for each state.
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
(Super State)" on page 18).
Economizer
OADP=100%
Mode
for > 3 min
DAT < VCLL
Yes
Reheat
HeatCap=100%
Mode
DAT < VCLL
Can't Cool Are inputs
Mode
20
Description of Operation
Economizer
Compressor/Water
Yes
Mode
Reheat Low Limit
Yes
Mode
OADP = OADH
Yes
DAT > VCLL
No
valid?
Yes
Return to
previous state
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No