BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ●
www.btucorp.com
XT-70 Control Panel 80
APPENDIX C:
XT PURGE CYCLES
Theory
This application note will describe each of the seven purge cycles of the XT-70 panel.
0 = No Purge cycles
1 = Time Purge, no ARL or CO2
2 = ARL (Ambient Reverse Loading), no CO2 or Time Purge
3 = ARL & CO2, no Time Purge
4 = ERV (Energy Recovery Ventilation) no CO2
5 = ERV with CO2
6 = Time Purge / Cooling Purge with CO2 sensor
Application:
Purge_cnfg = 0
No Purge: Fresh air doors only open in the Cooling Mode to control temperature.
To use this configuration, set the following E2 parameters:
Purge_Cnfg = 0
Purge_cnfg = 1
Timed Purge: The Time Purge cycle is used when a CO2 sensor is not available for purge
initiation.
Four parameters must be set to initiate the time purge. In the above example if the outside
air is less than 40 degrees initiate a purge cycle for 15 minutes every 6 hours and set the fans
To Next Page
Loading...