Daikin DPS - Economizer Set-up

Economizer Set-up
(See page 106 for more information)
Table 27: Economizer Setup Menu
Clg Stage Time is an adjustable item used to set a minimum
time period between compressor stage changes.
Chgover Temp is an adjustable item which sets the OA dry
bulb temperature at which the units changes over to the
economizer operation.
Clg DB is an adjustable item which sets a dead band around
the discharge cooling set point parameter. For example, if the
discharge cooling set point parameter is set to 55ºF and the
Clg DB parameter is set to 2ºF the dead band around the set
point would be from 56.0ºF to 54.0ºF.
Econo Period is an adjustable item which sets the “sampling
time” used in the PI control function of the economizer actuator.
Econo Gain is an adjustable item which sets the “Gain” used
in the PI control function of the economizer actuator.
Econo PAT is an adjustable item which sets the “project ahead
time” used in the PI control function of the economizer actuator.
Econo Max Chg is an adjustable item that sets the maximum
value for an increase or decrease of the economizer actuator.
Econo Diff is an adjustable item which sets a differential
above the EconChgovrT parameter. Economizer operation is
disabled when the OA Temp parameter indicates a value above
the EconChgovrT= parameter by more than this differential.
Clg Reset is an adjustable item used to set the type of cooling
reset to be used.
Min Clg Spt is an adjustable item which sets the minimum
cooling discharge set point for use with a cooling discharge air
temperature set point reset schedule.
Min Clg Spt @ is an adjustable item which sets the value of
the sensor input, selected with the Cooling Reset parameter,
at which the DAT cooling set point parameter is reset to the
minimum DAT cooling set point value.
Max Clg Spt is an adjustable item which sets the maximum
cooling discharge set point for use with a cooling discharge air
temperature set point reset schedule.
Max Clg Spt @ is an adjustable item which sets the value of
the sensor input, selected with the Cooling Reset parameter,
at which the DAT cooling set point parameter is reset to the
maximum DAT cooling set point value.
Item Display
Name
Default
Setting
Range
Password
Level
Clg Stage Time 5min 5–60min 4
Chgover Temp= 65.0°F 0.0–100.0°F 6
Clg DB= 2.0d°F 1.0–10.0d°F 4
Econo Period=
30/40s
(air/water)
0–999s 4
Econo Gain=
1–Oct
0.0–100.0 4
(air/water)
Econo PAT=
60/40s
0–999s 4
(air/water)
Econo Max Chg=
10/15%
0–100% 4
(air/water)
Econo Diff= 2°F 0–10°F 4
Clg Reset= None
None
6
Ntwrk
Space
Return
OAT
ExtmA
ExtV
Airow
Min Clg Spt= 65.0°F 40.0–100.0°F 6
Min Clg Spt @ 0/NA
0–100/
6
NA
°F
°C
mA
%
Max Clg Spt= 65.0°F 40.0–100.0°F 6
Max Clg Spt @ 100/NA
0–100/
6
NA
°F
°C
mA
%
coMMIssIon unIt
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