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DN-Series Integrated Programmable Controls
DOAS
The alarm level can be set pressure can be set such that if the pressure reaches the alarm
level, the unit will alarm but keep running.
You can also see the pressure in this screen so that if it gets close to the alarm level you can
change it at your convenience.
5.2 OPTIONS FOR SUPPLY FAN CONTROL
Units with a VFD or ECM for the supply fan can control the fan for constant speed, SA flow
control, supply duct static pressure control, CO2/VOC control, or CO2 Flow control. Available
modes may depend on the sensors added.
5.2.1 Constant Fan Speed Option
The analog voltage command to the supply fan VFD or ECM can be set from the unit controller
display or by the BMS. The adjustable range of 0% to 100% correspond to the minimum and
maximum fan operating speed.
This supply fan operation mode can be used to field balance the SA flow rate.
UNIT OPERATION
