1.800.627.4499
DN-Series Integrated Programmable Controls
DOAS
118
SYSTEM MONITORING
13.5.6 Frost Control
The frost control function utilizes the bypass to avoid frosting the enthalpic core. If bypass is
enabled, when the OA is lower than Analog Value 77 “Defrost_OA_SetP.Val” minus Analog
Value 78 “Defrost_OA_SetP.DBright,” and turns off again when the OA exceeds the AV77. The
frost control status can be viewed at Binary Input 70 “DefrostOn.”
When frost control is on, the bypass damper will modulate to maintain a maximum Analog Value
79 “Defrost_EA_High_SetP.Val.” The bypass damper position is viewed at Analog Input 59
“Bypass_Command.Val.”
13.5.7 Filter Monitoring
Filter pressures are read through Analog Input 24 “RA_Flt_Press.Val” and Analog Input 25
“OA_Flt_Press.Val.”
Filter alarm levels are set at Analog Value 35 “RA_Flt_AlarmHigh” and Analog Value 36 “OA_
Flt_AlarmHigh.”
13.5.8 Exhaust Fan Only Mode
If BMS control is enabled, the unit can also be put in exhaust fan only mode in occupied
operation using Binary Value 74 “UnitOnOffMng.BMSEFOnly.”
13.6 ADDING A BACNET LICENSE
13.6.1 Obtaining a BACnet License
If your controller does not have a BACnet license, contact whoever provided the unit to obtain
one. You will need the Hardware ID number on this screen when ordering. Be sure to copy it
carefully or the license will not work.
The license will be delivered as a file with extension “.ap1.”
13.6.2 Installing the BACnet License via Web Page
Prerequisites
u
Have ap1 BACnet upgrade file(s) located on your PC
u
Ethernet connection from the PC to the controller and view the web page
Steps
1. Go to the Upgrade Tab in the web pages.
