Symbio 700 in the Odyssey condenser requires a set of closed contacts from the AHU leak detection connected to UC P21-1 & 2 (TB-T1, TB-T2) for the condenser to operate.
Leak detection sensors in UCCA air handlers are connected to the 1W1 board. The sensor is powered by the 1W1 and when normal (no alarm) and powered, switches the neutral/ground on the 1W1 to TB7-17 (EX FS+). Since the sensor is switching a ground, a relay must be added to the AHU that is controlled by this switched ground.
See drawings below for connection to the 1W1 and from the relay to the condenser:
For more information about the 1W1 board and it's operation see this link:
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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.