102777-YIM-E-0206
Unitary Products Group 111
Demand Ventilation (ON) - Setting this parameter on tells
the control to expect a signal from a 0-10VDC CO
2
sensor.
The default setting for CO
2
is 1,000 ppm.
Demand Ventilation Setpoint - (1000 ppm) - This Setpoint
is the maximum Indoor Air Quality (IAQ) level that the control
will allow. It is adjustable from 700 ppm to 1500 ppm.
IAQ Sensor Range - (5,000 ppm) - This tells the control
what the full range is for a specific IAQ sensor. It can be
changed from 0 to 10,000 ppm.
Cooling Mode Enable (ON) - This tells the control if it has
Cooling Available (Mode Switch). If this option is turned off,
cooling operation is disabled. Note that this parameter does
not affect cooling operation in Comfort Ventilation mode.
Heating Mode Enable - (ON) - This tells the control if it has
Heating Available (Mode Switch). If this option is turned off,
heating operation is disabled. Note that this parameter does
not affect heating operation in Comfort Ventilation mode.
Space Setpoint Offset - (3°F) - The Space Setpoint Offset is
the +/- value the control will use to offset the Space Setpoint
when the slidebar Space Sensor is used. For example, if the
Space Setpoint Offset value is set to 3.0°F, shifting the slide-
bar all the way in minus direction will decrease the Space
Setpoint by 3.0°F and shifting it all the way in plus direction
will increase the Space Setpoint by 3.0°F. It is adjustable from
0°F to 5°F.
ASCD Override - This is not an option parameter but rather a
one-time command issued by pressing the Test / Reset / Up
button pressed and released within five seconds; the ASCD’s
will be set to zero for one cycle.
Run Test (Commissioning Test) - This is not an option
parameter but rather a one-time command, activated by set-
ting parameter 1 ON.
When the Run Test command is issued, the control will shut
the unit down if it is running and then start a Run test
sequence:
1. Turn on the Fan and then turn on all the compressors,
one at a time, with a 15-second delay between them.
Condenser fan #1 turns on with compressor #1, con-
denser fan #2 turns on with compressor #2. After the last
compressor has been turned on, the control will run the
compressors for the programmed minimum run time and
then turn them all off. Condenser fans are also turned off.
2. The control will then turn on the Heat stages, one at a
time, with a 15 second delay between them. The control
will run each Heat stage for three minutes and then turn
all the Heat off.
3. The control will then open the Economizer to the 100%
open position and wait five minutes before closing it to
the Minimum Position. When the economizer is at 100%,
the exhaust damper will be open to 100% and the
exhaust fan runs for 5 minutes, then shuts down.
4. During this Run Test operation the control will read all the
installed sensors and verify that their readings are good.
If any error is detected the control will display the appro-
priate error. During the Run Test, the supply fan contin-
ues to be monitored via the Air Proving Switch, and a fan
failure will cause a unit shutdown.
After the control is finished with the Run Test the normal oper-
ation will resume. This command is a good method to use to
ensure the control is operating and all input and output points
are functional.
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