The Options Board is required when adding Field-Installed Electric Heat kits to a Symbio Air Handler paired with a Symbio condenser.
Set the Options Board address to 75.
Power up.
Add Electric Heat in the Symbio 700 Configuration by using one of the methods below.
Using the On-Board menu
Go to Home, Utilities, Edit Configuration, Primary Heat for TTA’s, Secondary Heat for TWA’s.
Using the Phone App
Go to 
View Configuration, EDIT, Primary Heat for TTA’s, Secondary Heat for TWA’s.
Note: If the Options Board was powered up before setting the address, do an IMC Reset with the Phone App.
Go to 
Service, IMC Link Reset
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.