107 • dap4 User Manual
CO
2
Set point
Set point: 1000ppm (100-5000ppm)
Dead band: 25ppm (25-1000ppm)
Min Valve On: 5s (0-32767s)
Valve PWM: 10% (0-100%)
Note: This CO
2
set point screen is not shown if the control is not set for CO
2
control in the
factory settings menu.
c)
Temperature and humidity set point offsets for night time schedule.
To access the temperature and humidity set points, press Menu button then enter service
password (default is 0000). After entering the password, select Menu-C “Clock/Scheduler”
and go to the Night Schedule screen. Here you can adjust the offsets for temperature and
humidity during the night time schedule.
Night Schedule
Cooling offset: 5.0 (-30 to 10°F)
Heating offset: 5.0 (0 to 30 °F)
Humidify offset: 10% (0-30%)
Dehumidify offset: 10% (0-30%)
Note: Avoid selecting a cooling offset or heating offset that cause excessive power
consumption and/or lead to a system short cycle. (A warning message will appear under
such conditions). For instance, if cooling offset is set to minus 5°F and heating offset is set
to 1°F with 72°F Temp set point and 2°F dead band; during night schedule the cooling set
point is adjusted to 67° and heating set point is adjusted to 71°. This cause the compressor
to run at 69° (set point +dead band) and the heater to also run at 69° (set point – dead
band).
d)
Enable CO
2
control and CO
2
at night control
The default settings are that CO
2
control is Yes and Night CO
2
control is No. To access
these CO
2
control functions, Press Menu button then enter the Factory level password
(default is 0002). Advance to Menu-J “Factory settings” and move to the Options Installed
screen. Here you can enable the CO
2
options as desired.
Options Installed
Electronic Valve: None
Power Meter: No
CO
2
Control: Yes (No)
Night CO
2
Cntrl: No (Yes)
