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DOAS
2.11.4 Standard Operation Sequence
(1) Control Flowchart
DOAS inlet air is outdoor air.
As long as DOAS outdoor air inlet temperature does not reach the setting temperature of the controller,
thermo-OFF is not available and the operation is continued.
In addition, outdoor airflow directly into the indoor unit during thermo-OFF.
NOTE:
Thermo-ON: The outdoor unit and some indoor units are running.
Thermo-OFF: The outdoor unit and some indoor units stay on, but do not run.
■ Cooling Operation
Cooling Operation
Outdoor
Air Inlet
Temp.
Outdoor
Air Inlet
Temp.
> Set Temp.
Compressor: ON
(*) Refer to (2) below "Freeze Protection Control" for details.
■ Heating Operation
Heating Operation
Outdoor
Air Inlet
Temp.
Outdoor
Air Inlet
Temp.
> 32
F (0
C)
o
o
Compressor: ON
(*) Refer to (2) below "Freeze Protection Control" for details.
2-14
< 68
F (20
C)
o
o
< 71.6
F (22
C)
o
o
> 68
F (20
C)
o
o
> 71.6
F (22
C)
o
o
< Set Temp.
> 59
F (15
C)
o
o
> 55.4
F (13
C)
o
o
< 59
F (15
C)
o
o
< 55.4
F (13
C)
o
o
< 32
F (0
C)
o
o
< 19.4
F (-7
C)
o
o
Compressor: OFF
Outdoor
> 32
F (0
C)
o
o
Air Inlet
Temp.
< 32
F (0
C)
o
o
Compressor: OFF
(*)
Forced Heating Control
Forced Heating Control or
(*)
Forced Stop Control
(*)
Forced Stop Control 1
TC-16005-rev.2
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