Trane Odyssey TWE0904*A/B - EDC Switch Wiring; Checkout Procedure

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SSA-SVX06H-EN
Figure 26. MODBUS wiring
COMMON
MODBUS-
MODBUS+
Air Handler
Relay Board
SYMBIO
CONDENSER
ADAPTER
BOARD
1 1
3
2
1
2 2
3 3
J7 RB-P7
J16
Figure 27. 24VAC connection (electromechanical)
LTB1-R LTB1-B1
J10
Air Handler
Relay Board
ELECTROMECHANICAL
CONDENSER
RB-P10
24 VAC IN COMMON
1 2
1 2
Figure 28. Thermostat wiring (electromechanical)
T-STAT W2
T-STAT W1
T-STAT Y2
T-STAT Y1
T-STAT G
T-STAT GND
R (24VAC)
COIL
DEFROST
Air Handler
Relay Board
J5 RB-P5
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
W2
W1
Y2
Y1
G/EF
C
R
ELECTROMECHANICAL
CONDENSER
THERMOSTAT
EDC Switch Wiring
The Evaporator Defrost Control Switch is wired from
the factory Normally Open to operate with Symbio™
condensers. For operation with legacy Reliatel™ or
Electromechanical condensers, change the wiring on
the switch to the Normally Closed position and connect
the wires from the switch to the wires from the legacy
condenser that control this function.
Checkout Procedure
Complete the “Installation Checklist,” p. 28 once
installation of field wiring connections is complete. All
operational checks (unit running) must be made after
the outdoor unit is installed and system
interconnection is complete.
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