Trane ComfortLink II 4TWV8X24A1000A Installer's Manual page 17

Table 22. Low Voltage Hook-up Diagrams in clii mode
Communicating
Comfort Control
Note 4
Brown
D
R Red
B
Blue
Field wiring
1. In communicating mode, unused terminals are non-functional. Do not use.
2. Terminals present will vary by indoor model.
3. "D" is the data line. Installer to select a wire color.
4. If a 3rd party condensate overflow switch is installed, it should be wired in series with R to the thermostat or connected to the External
Switch terminals on the AFC. See External Switch wiring section in the air handler Installer's Guide.
5. Wire present only on Variable Speed Outdoor Units.
Note: Anti-oxidizing grease is supplied in the documentation package for use when making low voltage field wiring connections at the outdoor
unit. Apply grease to field wiring before installing wire caps to protect these connections from corrosion.
18-BC106D1-1C-EN
Figure 2. Fully Communicating System
Communicating
Indoor Unit
R
BK
D
D - Note 3
Y1
Y2
Note 1
G
&
W1
Note 2
W2
W3
B
B - Blue
O
E E l l e e c c t t r r i i c c a a l l – – L L o o w w V V o o l l t t a a g g e e C C o o m m m m u u n n i i c c a a t t i i n n g g
Communicating Outdoor Unit
Brown
Blue
DH
(Not used in clii mode)
DL
Neatly bundle all low voltage
wires as shown.
Note 5
Red
Only used for
Load Shed
(Cap off if
not used)
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