Wire the thermostat to the Symbio 700 J21 except for R and C, wire thermostat R to Symbio Adapter Board J15-1, wire thermostat C to Symbio Adapter Board J15-2.
Connections between Condenser and Air Handler
Thermostat Wire – 3 Wires w/o electric heat, 4 Wires with electric heat
- Symbio Condenser Adapter Board J15-2 to Air Handler LTB2-B2.
- Symbio Condenser UC J21-6 to Air Handler LTB2-Y2. (Y1 is not used in the Air Handler)
- Symbio Condenser Adapter Board J18-1 to Air Handler LTB2-G.
- Symbio Condenser UC J21-3 to Air Handler LTB2-W1 (W1 and W2 are jumped together in the Air Handler to take care of activating the HSR1)
Note: If you have a Single Compressor Condenser connect UC J21-2 to LTB2-Y2 to bring on High Speed Fan in cooling.
Symbio Configuration
- Space controller configuration: When connecting a Conventional Thermostat to the Symbio UC, ensure that the Symbio 700 UC configuration has been set for the appropriate device - Conventional TStat.
- Indoor Fan Type: When connecting the Symbio Condenser to an electromechanical air handler with 2-speed fan operation, ensure that the Symbio 700 UC Indoor Fan Type configuration is set to its default “Single Speed” selection. The Air Handler Relay Board will take care of switching the fan speeds based on the thermostat call.
- Primary Heating Source: If the Air Handler has Electric Heat, be sure to configure the Symbio 700 UC for Primary Heating Source – Not Installed or you will get a Diagnostic for Indoor Options Module Comm Fail (The Symbio 700 will still turn the Indoor Fan on with a W1 call)
If using the EDC (Evaporator Defrost Control) thermostat in the legacy air handler:
- Make wiring changes to EDC switch shown below and connect EDC to Condenser UC J16-1 and 2.
- Using the Phone App go to Tools, Service, Customer Connection Polarity and change Demand Limit Input to Reversed.
- In Settings, Edit Configuration set Demand Management to Demand Limit and in Settings, Refrigeration set Cooling Demand Limit Capacity Enable Setpoint to 0%.
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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.