Econo Set-Up - Daikin MicroTech III Operation Manuals

Figure 10 graphically shows the cooling reset operation . The
normal DAT cooling set point is 55 .0 F . The cooling reset
scheme is set to airflow. The unit is to adjust the DAT from 55.0
F to 65.0 F. When the unit is at 35% of the design airflow the
discharge temperature is to be 65 .0 F . When the unit is at 80%
of its airflow the DAT is to be 55.0F. This example would give
the following inputs:
• Min Clg Spt= 55 .0 F
• Min Clg Spt @= 80%
• Max Clg Spt= 65 .0 F
• Max Clg Spt @= 35%
Based on the above, the unit will have a discharge air
temperature set point of 55 .0 F from 80% to 100% of the
airflow.

Econo Set-up

Table 26: Economizer Setup Menu
Item Display Name
EconChgovr=
Econo FDD=
Clg Stg Time=
Clg Stg Time=
Chgover Temp=
Clg DB=
Econo Period=
Econo Gain=
Econo PAT=
Econo Max Chg=
Flush Econo=
Econo Diff=
EWT Diff=
Clg Reset=
Min Clg Spt=
Min Clg Spt @=
Max Clg Spt=
Max Clg Spt @=
Max OAT Lmt=
Min OAT Lmt=
Calibrate OAD=
PosSwOpen=
Max Sw Diff=
PosSwClose=
Min Sw Diff=
OAD Sw Status=
OM 920-6 • MICROTECH UNIT CONTROLLER
Unocc Diff is an adjustable item that sets the unoccupied
cooling differential .
Figure 10: Cooling Setpoint
Default Setting
Enth&DB
ON
5min
5min
55 .0°F
2 .0°F
30/40s (air/water)
1-Oct (air/water)
60/40s (air/water)
10/15% (air/water)
Yes
2°F
3 .0°F
None
55 .0°F
0/NA
65 .0°F
100/NA
75 .0°F
70 .0°F
No
97%
3%
3%
5%
—
44
Range
None
OAT
OAT/RAT
Enth&OAT
OFF
ON
5–60min
2–60min
0 .0–100 .0°F
1 .0–10 .0°F
0-999s
0 .0–100 .0
0–999s
0–100%
No
Yes
0–10°F
0 .0–10 .0°F
None
Network
Space
Return
OAT
ExtmA
ExtV
Airflow
40 .0–100 .0°F
0–100/
NA
°F
°C
mA
%
40 .0–100 .0°F
0–100/
NA
°F
°C
mA
%
50 .0–100 .0°F
50 .0–100 .0°F
No
Yes
0–100%
0–100%
0–100%
0–100%
Open
Closed
M d
enu esCrIpTIons
Password Level
4
2
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
2
2
2
2
2
2
2
2
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