2. Wiring
2.1 Setting R Slider Tab
Use the built-in jumper (R Slider Tab) to appropriately configure the thermostat for one- or two- transformer systems.
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If there is only one R wire, and it is connected to the R, Rc, or Rh terminal, set the slider to the Up position (1 wire).
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If there is one wire connected to the R terminal and one wire connected to the Rc terminal, set the slider to the Down position (2 wires).
Note:The Slider Tab for U terminals should be left in place for T6 Pro models.
2.2 Wiring Terminal Designations
|
S |
Input for wired indoor or outdoor sensors (TH6320U and TH6220U only) |
|
S |
|
|
Y |
Compressor contactor (stage 1) |
|
Y2 |
Compressor contactor (stage 2) |
|
G |
Fan |
|
C |
24VAC common. For 2 transformer systems, use common wire from cooling transformer. |
|
U |
Unused |
|
U |
|
|
L/A-A |
Heat pump fault input. The Common wire (C) is required for LA/A. |
|
O/B |
Changeover valve |
|
AUX-W2 |
Auxiliary heat or Heat (stage 2) |
|
E |
Emergency Heat |
|
W |
Heat (stage 1) Note: Not to be used in heat pump applications |
|
K |
Unused |
|
R |
24VAC power from heating transformer |
|
Rc |
24VAC power from cooling transformer* |
Note: Terminal can be jumped using R Slider Tab. See 2.1 Setting R Slider Tab above.
2.3 Wiring Conventional Systems: Forced Air and Hydronics
|
1H/1C System (1 Transformer) |
|
|---|---|
|
R |
Power [1] |
|
Rc |
(R+Rc joined by R Slider Tab) [2] |
|
Y |
Compressor contactor |
|
C |
24VAC common (Optional with batteries) |
|
W |
Heat |
|
G |
Fan |
[1] Power supply. Provide disconnect means and overload protection as required.
[2] Move R Slider Tab on UWP to the R setting. For more information, see “2.1 Setting R Slider Tab” above.
|
Heat-Only System |
|
|---|---|
|
R |
Power [1] |
|
Rc |
(R+Rc joined by R Slider Tab) [2] |
|
C |
24VAC common (Optional with batteries) |
|
W |
Heat |
[1] Power supply. Provide disconnect means and overload protection as required.
[2] Move R Slider Tab on UWP to the R setting. For more information, see “2.1 Setting R Slider Tab” above.
|
Heat-Only (Series 20) |
|
|---|---|
|
R |
Series 20 valve terminal “R” [1] |
|
Rc |
(R+Rc joined by R Slider Tab) [2] |
|
Y |
Power-closed terminal at valve |
|
C |
24VAC common (Optional with batteries) |
|
W |
Power-closed terminal at valve |
In ISU set Heat System Type (ISU#200) to Radiant Heat (Option 3). Set number of Cool Stages (ISU#220) to 0.
[1] Power supply. Provide disconnect means and overload protection as required.
[2] Move R Slider Tab on UWP to the R setting. For more information, see “2.1 Setting R Slider Tab” above.
|
Heat-Only (Power Open Zone Valve) |
|
|---|---|
|
R |
Power [1] |
|
Rc |
(R+Rc joined by R Slider Tab) [2] |
|
C |
24VAC common (Optional with batteries) |
|
W |
Heat |
In ISU set Heat System Type (ISU#200) to Radiant Heat (Option 3). Set number of Cool Stages (ISU#220) to 0.
[1] Power supply. Provide disconnect means and overload protection as required.
[2] Move R Slider Tab on UWP to the R setting. For more information, see “2.1 Setting R Slider Tab” above.
|
1H/1C System (2 Transformer R-Slider Down) |
|
|---|---|
|
R |
Power (heat transformer)[1] |
|
Rc |
Power (cool transformer)[1] |
|
Y |
Compressor contactor |
|
C |
24VAC common (Optional with batteries) [2] |
|
W |
Heat |
|
G |
Fan |
[1] Power supply. Provide disconnect means and overload protection as required.
[2] Common connection must come from cooling transformer.
|
Heat-Only System with Fan |
|
|---|---|
|
R |
Power [1] |
|
Rc |
(R+Rc joined by R Slider Tab) [2] |
|
C |
24VAC common (Optional with batteries) |
|
W |
Heat |
|
G |
Fan |
[1] Power supply. Provide disconnect means and overload protection as required.
[2] Move R Slider Tab on UWP to the R setting. For more information, see “2.1 Setting R Slider Tab” above.
|
Cool-Only System |
|
|---|---|
|
R |
Power [1] |
|
Rc |
(R+Rc joined by R Slider Tab) [2] |
|
Y |
Compresor contactor |
|
W |
Heat |
|
G |
Fan |
[1] Power supply. Provide disconnect means and overload protection as required.
[2] Move R Slider Tab on UWP to the R setting. For more information, see “2.1 Setting R Slider Tab” above.
|
2H/2C System (1 Transformer) (TH6320U/TH6220U only) |
|
|---|---|
|
R |
Power [1] |
|
Rc |
(R+Rc joined by R Slider Tab) [2] |
|
Y |
Compressor contactor (stage 1) |
|
C |
24VAC common (Optional with batteries) |
|
W |
Heat |
|
G |
Fan |
|
W2 |
Heat (stage 2) |
|
Y2 |
Compressor contactor (stage 2) |
In ISU, set Heat System Type (ISU#200) to Conventional Forced Air Heat (Option 1), Cool Stages (ISU#220) to 2 and Heat Stages (ISU#221) to 2.
[1] Power supply. Provide disconnect means and overload protection as required.
[2] Move R Slider Tab on UWP to the R setting. For more information, see “2.1 Setting R Slider Tab” above.
2.4 Wiring Heat Pump Systems
|
1H/1C Heat Pump System |
|
|---|---|
|
R |
Power [1] |
|
Rc |
(R+Rc joined by R Slider Tab) [2] |
|
Y |
Compresor contactor |
|
C |
24VAC common (Optional with batteries) |
|
O/B |
Changeover valve [3] |
|
G |
Fan |
|
W |
Do not use this terminal for heat pump applications! |
[1] Power supply. Provide disconnect means and overload protection as required.
[2] Move R Slider Tab on UWP to the R setting. For more information, see “2.1 Setting R Slider Tab” above.
[3] In ISU, set Reverse Valve O/B (ISU#218) to O: O/B in Cool (Option 0) or B: O/B in Heat (Option 1).
|
2H/1C Heat Pump System |
|
|---|---|
|
R |
Power [1] |
|
Rc |
(R+Rc joined by R Slider Tab) [2] |
|
Y |
Compresor contactor |
|
C |
24VAC common (Optional with batteries) |
|
O/B |
Changeover valve [3] |
|
Aux |
Auxiliary Heat |
|
E |
Emergency Heat |
|
L |
Heat Pump fault input |
|
W |
Do not use this terminal for heat pump applications! |
In ISU, set Heat System Type (ISU#200) to Heat Pump (Option 2), Cool Stages (ISU#220) to 1 and Backup Heat Stages (ISU#221) to 1.
[1] Power supply. Provide disconnect means and overload protection as required.
[2] Move R Slider Tab on UWP to the R setting. For more information, see “2.1 Setting R Slider Tab” above.
[3] In ISU, set Reverse Valve O/B (ISU#218) to O: O/B in Cool (Option 0) or B: O/B in Heat (Option 1).
|
2H/2C Heat Pump System (TH6320U only) |
|
|---|---|
|
R |
Power [1] |
|
Rc |
(R+Rc joined by R Slider Tab) [2] |
|
Y |
Compresor contactor (stage 1) |
|
C |
24VAC common (Optional with batteries) |
|
O/B |
Changeover valve [3] |
|
G |
Fan |
|
Y2 |
Compresor contactor (stage 2) |
|
L |
Heat Pump fault input |
|
W |
Do not use this terminal for heat pump applications! |
In ISU, set Heat System Type (ISU#200) to Heat Pump (Option 2), Cool Stages (ISU#220) to 1 and Backup Heat Stages (ISU#221) to 0.
[1] Power supply. Provide disconnect means and overload protection as required.
[2] Move R Slider Tab on UWP to the R setting. For more information, see “2.1 Setting R Slider Tab” above.
[3] In ISU, set Reverse Valve O/B (ISU#218) to O: O/B in Cool (Option 0) or B: O/B in Heat (Option 1).
|
3H/2C Heat Pump System (TH6320U only) |
|
|---|---|
|
R |
Power [1] |
|
Rc |
(R+Rc joined by R Slider Tab) [2] |
|
Y |
Compresor contactor (stage 1) |
|
C |
24VAC common (Optional with batteries) |
|
O/B |
Changeover valve [3] |
|
G |
Fan |
|
Aux |
Auxiliary Heat |
|
E |
Emergency Heat |
|
Y2 |
Compresor contactor (stage 2) |
|
L |
Heat Pump fault input |
|
W |
Do not use this terminal for heat pump applications! |
In ISU, set Heat System Type (ISU#200) to Heat Pump (Option 2), Cool Stages (ISU#220) to 2 and Backup Heat Stages (ISU#221) to 1.
[1] Power supply. Provide disconnect means and overload protection as required.
[2] Move R Slider Tab on UWP to the R setting. For more information, see “2.1 Setting R Slider Tab” above.
[3] In ISU, set Reverse Valve O/B (ISU#218) to O: O/B in Cool (Option 0) or B: O/B in Heat (Option 1).
|
Dual Fuel System (TH6320U / TH6220U only) |
|
|---|---|
|
R |
Power [1] |
|
Rc |
(R+Rc joined by R Slider Tab) [2] |
|
Y |
Compresor contactor (stage 1) |
|
C |
24VAC common (Optional with batteries) |
|
O/B |
Changeover valve [3] |
|
G |
Fan |
|
Aux |
Auxiliary Heat |
|
E |
Emergency Heat |
|
Y2 |
Compresor contactor (stage 2 - If needed) [4] |
|
L |
Heat Pump fault input |
|
S |
Outdoor Sensor |
|
S |
Outdoor Sensor |
|
W |
Do not use this terminal for heat pump applications! |
[1] Power supply. Provide disconnect means and overload protection as required.
[2] Move R Slider Tab on UWP to the R setting. For more information, see “2.1 Setting R Slider Tab” above.
[3] In ISU, set Reverse Valve O/B (ISU#218) to O: O/B in Cool (Option 0) or B: O/B in Heat (Option 1).
[4] Dual fuel with Y2 only for TH6320U.