Trane SYMBIO 700 Troubleshooting Manual page 154

Connections between Condenser and Air Handler (if using EDC add 2 more wires)
1. Thermostat Wire – 5 Wires w/o electric heat, 7 Wires with electric heat
a. Symbio Condenser Adapter Board J15-1 to Air Handler LTB2-R.
b. Symbio Condenser Adapter Board J15-2 to Air Handler LTB2-B1.
c. Symbio Condenser Adapter Board J18-1 to Air Handler Relay Board J5-4
d. Symbio Condenser UC J21-2 to Air Handler Relay Board J5-5
e. Symbio Condenser UC J21-6 to Air Handler Relay Board J5-6
f. Symbio Condenser UC J21-3 to Air Handler LTB2-W1
g. Symbio Condenser UC J21-5 to Air Handler LTB2-W2
Connections inside Air Handler
2. Thermostat Wire
a. Air Handler LTB2-R to Relay Board J10-1
b. Air Handler LTB2 –B1 to Relay Board J10-2
c. Air Handler LTB2-W1 to Relay Board J5-7
d. Air Handler LTB2-W2 to Relay Board J5-8
3. VFD Programming
a. 5-40 Function Relay – [0] (Relay 1) [6] Running / no warning (Relay 2)
4. Symbio Configuration
a. System Type: CVZT
b. Indoor Fan Type: Single Speed
5. Fan Interlock Wiring for Electric Heat
a. Add a field wire from VFD Relay 2, Terminal 5 to LTB2-B1.
b. Move the Brown wire (from the Electric Heat Accessory) from LTB1-J to VFD Relay 2, Terminal 4.
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