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To adjust the maximum position, perform the following
procedure:
1. Disconnect the mixed-air sensor from terminals T and T1
and short terminals T and T1.
2. Ensure that the factory-installed jumper is in place across
terminals Q and Q1. If remote damper positioning is be-
ing used, make sure that the terminals are wired accord-
ing to Fig. 33 and minimum position potentiometer is
turned fully clockwise.
3. Connect 24 vac across terminals TR and TR1.
4. Carefully adjust the maximum position potentiometer
until the desired position is reached.
Remote control of the EconoMi$er2 damper is desirable
when requiring additional temporary ventilation. If a field-
supplied remote potentiometer (Honeywell part number
S963B1128) is wired to the EconoMi$er2 controller, the mini-
mum and maximum position of the damper can be controlled
from a remote location.
To control the minimum damper position remotely, wire the
field-supplied potentiometer to the P and P1 terminals on the
EconoMi$er2 controller. See Fig. 33.
To control the maximum damper position remotely, wire the
field-supplied potentiometer to the Q and Q1 terminals on the
EconoMi$er2 controller. See Fig. 33.
EconoMi$er2 Usage Tracking — The Free Cool contacts on
the EconoMi$er2 controller close when the EconoMi$er2 is
providing free cooling. See Fig. 25. Free cooling usage time
can be tracked by connecting a field-supplied timer to the free
cool contacts.
Purge — When terminals PG and PG1 on the EconoMi$er2
controller connect through relay contacts or a jumper, the purge
function is energized. See Fig. 34. The EconoMi$er2 damper
drives fully closed and the exhaust fan turns on.
Shutdown — When terminals SD and SD1 on the Econo-
Mi$er2 controller connect through relay contacts or a jumper,
all systems are shut down. See Fig. 34. The EconoMi$er2
damper drives fully closed, the exhaust fan turns off, and the
indoor fans turn off.
Air Change (Evacuation) — When terminals AC and AC1 on
the EconoMi$er2 controller connect through relay contacts or a
jumper, an air change is initiated. See Fig. 34. The
EconoMi$er2 damper drives fully opened, the exhaust fan
turns on, and the indoor fans turn on.
Demand Control Ventilation — When using the EconoMi$er2
for demand control ventilation, there are some equipment selec-
tion criteria which should be considered. When selecting the
heat capacity and cool capacity of the equipment, the maximum
ventilation rate must be evaluated for design conditions. The
maximum damper position must be calculated to provide the
desired fresh air.
Typically the maximum ventilation rate will be about 5 to
10% more than the typical CFM required per person, using
normal outside air design criteria. The Ventilator software (de-
mand control ventilation software) may be used to determine
the CO
recovery rate at maximum ventilation.
2
A proportional anticipatory strategy should be taken with
the following conditions: a zone with a large area, varied occu-
pancy, and equipment that cannot exceed the required ventila-
tion rate at design conditions. Exceeding the required ventila-
tion rate means the equipment can condition air at a maximum
ventilation rate that is greater than the required ventilation rate
for maximum occupancy. A proportional-anticipatory strategy
will cause the fresh air supplied to increase as the room CO
level increases even though the CO
2
set point has not been
2
23
reached. By the time the CO
damper will be at maximum ventilation and should maintain
the set point.
In order to have the CO
damper in this manner, first determine the damper voltage out-
put for minimum or base ventilation. Base ventilation is the
ventilation required to remove contaminants during unoccu-
pied periods. The following equation may be used to determine
the percent of outside-air entering the building for a given
damper position. For best results there should be at least a
10 degree difference in outside and return-air temperatures.
(T
x OA) + (T
x RA) = T
O
R
T
= Outdoor-Air Temperature
O
OA = Percent of Outdoor Air
T
= Return-Air Temperature
R
RA = Percent of Return Air
T
= Mixed-Air Temperature
M
The same equation can be used to determine the occupied or
maximum ventilation rate to the building. For example, an out-
put of 3.6 volts to the actuator provides a base ventilation rate
of 5% and an output of 6.7 volts provides the maximum venti-
lation rate of 20% (or base plus 15 cfm per person). Use Fig. 35
to determine the maximum setting of the CO
ample, a 1100 ppm set point relates to a 15 cfm per person de-
sign. Use the 1100 ppm curve on Fig. 35 to find the point when
the CO
sensor output will be 6.7 volts. Line up the point on the
2
graph with the left side of the chart to determine that the range
configuration for the CO
sensor should be 1800 ppm. The
2
EconoMi$er2 controller will output the 6.7 volts from the CO
sensor to the actuator when the CO
is at 1100 ppm. The ISI set point may be left at 2 volts since the
CO
sensor voltage will be ignored by the EconoMi$er2 con-
2
troller until it gets above the 3.6 volt setting of the minimum
position potentiometer. The maximum position potentiometer
should be left at full open unless the user wants to limit the
damper travel for both CO
and EconoMi$er2 operation.
2
CO
Sensor Configuration — The CO
2
standard voltage settings that can be selected anytime after the
sensor is powered up. See Table 4.
NOTE: Use setting 1 or 2 for Carrier equipment. See Table 4.
1. Press Clear and Mode buttons. Hold at least 5 seconds
until the sensor enters the Edit mode.
2. Press Mode twice. The STDSET Menu will appear.
3. Use the Up/Down button to select the preset number. See
Table 4.
4. Press Enter to lock in the selection.
5. Press Mode to exit and resume normal operation.
The custom settings of the CO
time after the sensor is energized. Follow the steps below to
change the non-standard settings:
1. Press Clear and Mode buttons. Hold at least 5 seconds
until the sensor enters the Edit mode.
2. Press Mode twice. The STDSET Menu will appear.
3. Use the Up/Down button to toggle to the NONSTD menu
and press Enter.
4. Use the Up/Down button to toggle through each of the
nine variables, starting with Altitude, until the desired set-
ting is reached.
5. Press Mode to move through the variables.
6. Press Enter to lock in the selection, then press Mode to
continue to the next variable.
level reaches the set point, the
2
sensor control the economizer
2
M
sensor. For ex-
2
concentration in the space
2
sensor has preset
2
sensor can be changed any-
2
2
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