Wire thermostat to the Air Handler Relay Board J5 except for R and C, wire R to the Symbio Air Handler Relay Board J10-1, wire “COM” to Symbio Air Handler Relay Board J10-2.
Connections between the Condenser and Air Handler
Thermostat Type Wire – 4 wires
- The Y1 from the thermostat will go directly to the Condenser LTB1-Y1.
- The Y2 from the thermostat will go directly to the Condenser LTB1-Y2.
- Condenser LTB1-R to Symbio Air Handler Relay Board J10-1.
- Condenser LTB1-B1 to Symbio Air Handler Relay Board J10-2.
Note: W1 and W2 connections are needed only if air handler has an electric heat accessory installed. A new electric heater must be used with a Symbio air handler. Legacy electric heaters cannot reused on Symbio air handlers.
If the EDC (Evaporator Defrost Control) thermostat is used, follow these steps:
- Switch is shipped in the normally open configuration. When pairing with an electromechanical condenser, move wire from terminal “H” to terminal “L” on EDC switch, enabling normally closed switch operation.
- Cut the EDC Black wire from plug AB J8-1 and move to AB J10-2
- Add a thermostat wire from AB J5-1 to Condenser LTB1-B2
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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.