Chiltrix Inc. www.chiltrix.com
How to Use Chiltrix Dynamic Outdoor Reset Control
When Not Using V18 Backup Heat
Use the free Excel curve development tool to create the proper curve and discover correct parameter
settings for P48 and P49.
The tool is located at https://www.chiltrix.com/dynamic-heat-reset/
Set parameter P48 and P49 in cx34 controller according to the values used in your curve.
Enable AU of heat mode as shown below.
There also is an "AU" icon on first page of the standard controller display that will indicate when the AU
setting is enabled. The AC target will change according to air temp which you can see from controller
1st page.
Using Chiltrix Dynamic Outdoor Reset Control
with V18 Backup Heat External Controller
If you are using V18 dynamic backup heat, then DO NOT enable Dynamic Outdoor Reset Control in the
controller as shown above. You will input the P48/P49 settings as explained above but DO NOT enable AU.
Instead, you will enable Dynamic Outdoor Reset Control in the V18 controller manual.
See the V18 Backup Heater Manual for more information.
More information about Dynamic Outdoor Reset Control is here https://www.chiltrix.com/dynamic-heat-
reset/
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