When using a Symbio condenser with a UC400B Equipped Blower/Fan Coil unit, the UC device in the indoor unit becomes the system controller. Fan, heat and any other system control will rely on the UC400B. In this scenario, wiring only involves 24vac from the condenser and a wire for each stage. Pilot relays are not required.
Single or Dual Stage TTA (Cooling Only)
Single Stage TWA (Heat Pump)
Dual Stage TWA (Heat Pump)
Be aware that if using test mode on the Symbio controller, that the indoor fan must be running prior to starting test mode.
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.