-20
-29
-10
-23
0
-18
10
-12
20
-7
30
-1
40
4
50
10
60
16
70
21
80
27
90
32
100
38
0
10
30
40
50
60
70
80
90
100
20
OUTDOOR AIR TEMPERATURE
0
10
30
40
50
60
70
80
90
100
20
MIXED AND RETURN AIR TEMPERATURE
CHART 1
CALCULATE MINIMUM FRESH AIR PERCENTAGE
A
BC
F
C
F
C
-20
-29
-10
-23
0
-18
10
-12
20
-7
30
-1
40
4
50
10
60
16
70
21
80
27
90
32
100
38
F
C
F
C
FIGURE 23
above setpoint. Adjust the DCV MAX potentiometer to the
NOTE - DCV Max must be set higher than economizer
minimum position setting for proper demand control ven-
tilation.
Economizer Operation
The occupied time period is determined by the thermostat
or energy management system.
Outdoor Air Not Suitable:
During the unoccupied time period dampers are closed.
During the occupied time period a cooling demand will
open dampers to minimum position and mechanical
During the occupied time period dampers will open to DCV
Outdoor Air Suitable:
twostage thermostat.
occupancy is high and outdoor air temperatures are low.
dampers will move to minimum position until discharge air
IMPORTANT
Remove jumper R and OC when unit is controlled
with a thermostat that has a night setback mode. If
reheat operation is desired during tjhis time, wire
A20 to R.
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