Overview:
These two units are not intended to be paired together.
If (by accident) they end up together here is a suggestion to make it work.
Be aware electric heat will not work in Defrost Mode on a Heat Pump!
Wire the thermostat directly to the Symbio 700 (UC) J21 except for thermostat "R", use the Adapter Board J15-1 for that.
Note: A Zone Sensor will not control Electric Heat in this application
Symbio Configuration
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 compressor operation / 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 Options Module Comm Fail (The Symbio 700 will still turn the Indoor Fan on with a W1 or W2 call)
Connections Between the Condenser and the Air Handler
Thermostat Wire – 4 wires (5 or 6 wires with electric heat)
Symbio Condenser Adapter Board J15-1 & 2 to Symbio Air Handler Relay Board J10-1 & 2. (power for Air Handler RB)
Symbio Condenser Adapter Board J18-1 to Symbio Air Handler Relay Board J5-4. (indoor fan run)
Symbio Condenser (UC) J16-2 to Symbio Air Handler Relay Board J5-1. (EDC)
Symbio Condenser (UC) J21-3 to Symbio Air Handler Relay Board J5-7. (electric heat stage 1) -do not make this connection on a Heat Pump condenser
Symbio Condenser (UC) J21-5 to Symbio Air Handler Relay Board J5-8. (electric heat stage 2)
Additional Thermostat Wires (based on condenser type)
Single Compressor Condenser
Splice a wire to Condenser Adapter Board J7-1 (or the 24 VAC hot wire on the contactor coil), connect the other end to Air Handler Relay Board J5-6
Theory of Operation
In fan only operation the Air Handler will run Low Speed.
When the Symbio 700 calls for compressor operation the Air Handler will switch to High Speed.
Dual Compressor Condenser (except for 10 and 20 ton)
Splice a wire to Condenser Adapter Board J7-3 (or the 24 VAC hot wire on the contactor coil), connect the other end to Air Handler Relay Board J5-6
Theory of Operation
In fan only, or when the Symbio 700 calls for Compressor 1 the Air Handler will run Low Speed.
When the Symbio 700 calls for Compressor 2, the Air Handler will switch to High Speed.
Dual Compressor Condenser 10 and 20 ton
Splice a wire to Condenser Adapter Board J12-1, connect the other end to Air Handler Relay Board J5-6.
Theory of Operation
In fan only or unloaded compressors operation the Air Handler will run Low Speed.
When the Symbio 700 energizes AB J12-2 (loads the compressors up) the Air Handler will switch to High Speed.
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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.