Trane Odyssey TWE0904*A/B - Pairing C: Legacy Electromechanical Condenser with 2-Speed Air Handler

SSA-SVX06H-EN
31
refer to Air Handler unit schematic and Electric
Heat Accessory Installation Guide (ACC-
SVN91*-EN).
Pairing C: Legacy Electromechanical
Condenser with 2-Speed Air Handler
IImmppoorrttaanntt:: Preserve existing wiring between
thermostat and condenser.
1. 24VAC connection
a. For TWE060 units, transformer TNS3 is
provided and factory wired to supply 24VAC to
the Relay Board.
b. For all other units, 24VAC should be supplied to
the air handler from the outdoor unit as shown
in Figure 27, p. 32.
2. Install wiring from room thermostat to Air Handler
Relay Board as shown in Figure 28, p. 32. Note that
thermostat terminals Y1 and Y2 must also be wired
to the condenser for control of compressors.
3. Evaporator Coil Defrost Control: Follow instructions
on the Air Handler unit schematic on configuring
and connecting the Evaporator Defrost Control
(EDC) Switch.
4. Electric Heat (when installed): For all wiring
associated with electric heat, refer to Air Handler
unit schematic and Electric Heat Accessory
Installation Guide (ACC-SVN91*-EN).
Field Control Wiring
Figure 23. 24VAC wiring to air handler from outdoor
unit
1
J15
J10
Air Handler
Relay Board
SYMBIO CONDENSER
ADAPTER BOARD
RB-P10
24 VAC IN COMMON
2
1 2
1 2
Figure 24. Interconnection wiring to initiate supply
fan operation and prevent coil frosting
T-STAT W2
T-STAT W1
T-STAT Y2
T-STAT Y1
T-STAT G
AB-J18
T-STAT GND
R (24VAC)
COIL
DEFROST
Air Handler
Relay Board
UC-J16
J5 RB-P5
SYMBIO
CONDENSER
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
Figure 25. IMC wiring
IMC-
IMC+
COMMON
24 VAC
Air Handler
Relay Board
SYMBIO
CONDENSER
ADAPTER
BOARD
1 1
4
3
2
1
2 2
3 3
4 4
J4 RB-P4
J15
IInnssttaallllaattiioonn