Install wiring from room thermostat to Air Handler Relay Board J5 except for thermostat "R", use Relay Board J10-1 for that connection.
Electric Heat (when installed) - Wire thermostat W1 and W2 to Relay Board J5-7 & 8.
Connections between Condenser and Air Handler:
Thermostat Type Wire – 4 wires (add one more wire if using EDC switch)
- Electromechanical Condenser LTB1-R to Symbio Air Handler Relay Board J10-1.
- Electromechanical Condenser LTB1-B1 to Symbio Air Handler Relay Board J10-2.
- Electromechanical Condenser LTB1-Y1 to Symbio Air Handler Relay Board J5-5.
- Electromechanical Condenser LTB1-Y2 to Symbio Air Handler Relay Board J5-6.
Evaporator Coil Defrost Control:
If the EDC (Evaporator Defrost Control) thermostat is used, follow these steps:
- Switch is shipped in the normally open configuration. Move wire from terminal “H” to terminal “L” on EDC switch, enabling normally closed switch operation.
- Cut the EDC Black wire from plug J8-1 and move to J10-2.
- Add a thermostat wire from Condenser LTB1-B2 to Symbio Air Handler Relay Board J5-1.
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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.