18-AC55D1-4
5
Installer’s Guide
FIELD HOOK-UP DIAGRAMS FOR 4TTX6 MODELS ONLY
Notes:
1. Be sure power supply agrees with equipment nameplate.
2. Power wiring and grounding of equipment must comply with local codes.
3. Low voltage wiring to be No. 18 AWG minimum conductor.
4. If outdoor thermostat (ODT) is not used, connect W2 to W3.
5. Be sure the jumper between “R” and “BK” is cut or removed
(See Note B below).
6. With “O” and “Y/ Y2” energized, indoor fan is at 80% airflow.
7. With “O”, “Y/ Y2” and “BK” energized, indoor fan is at 100% airflow.
REQUIRED WIRING
Refer to Field Hook-up Diagrams above.
4TTX6 units require 80% airflow with “Y1” (first stage),
100% airflow with “Y2” (second stage).
Note A –
The installer must jumper at the LVTB “R” to “O”.
Note B –
Cut /remove the factory installed “BK” jumper (See Figures 1 & 2)
Connect “Y1” from thermostat to “Y/ Y2” at VS Air Handler/VS Furnace to “Y1” at Outdoor Unit.
Connect “Y2” from thermostat to “BK” at VS Air Handler/VS Furnace to “Y2” at Outdoor Unit.
LEGEND
FACTORY WIRING
FIELD WIRING
G
O
B
W3
W3 W2
W2 W1
W1
R
BK
BK
T
Y
Ylo
Ylo
Jumper
1
ON
OFF
W14
BK JUMPER
2
1 2
BLK/TWIN
BLK/TWIN
W2
W2
W1
W1
R
R
G
G
B
B
Y
Y
YLO
YLO
O
O
The Factory installed jumper between
“R” and “BK” on the Furnace circuit
board must be cut.
See Note B.
FURNACE
AIR HANDLER
1
2
See Note B
See
Note A
See
Note A
