Specifications
X8S & X8Q Smart Thermostat Description
|
Feature |
Description |
|
Powering Method |
Common wire required |
|
Stages: Up to 3H/2C Heat pump Up to 2H/2C conventional |
Equipment type:
|
|
Changeover |
Manual or Auto Changeover Selectable |
|
System Setting |
Em Heat-Heat-Off-Cool-Auto |
|
Fan Setting |
Auto-On-Circ |
Electrical ratings of X8S & X8Q Smart Thermostat
|
Terminal |
Voltage (60Hz) |
Running Current |
|
W (Heat) |
20-30 VAC |
0.02-1.0 A |
|
W2 (Aux) Heat |
20-30 VAC |
0.02-1.0 A |
|
E (Not Used) |
||
|
Y (Compressor Stage 1) |
20-30 VAC |
0.02-1.0 A |
|
Y2 (Compressor Stage 2) |
20-30 VAC |
0.02-1.0 A |
|
G (Fan) |
20-30 VAC |
0.02-0.5 A |
|
O/B (Changeover) |
20-30 VAC |
0.02-0.5 A |
|
L/A (Fault input from heat pump) |
20-30 VAC |
0.02-0.5 A |
|
U (Humidifier, Dehumidifier, or Ventilator) |
20-30 VAC |
0.02-0.5 A |
Power Consumption: 3.0 VA MAX
Wireless Communication:
Bluetooth: BLE 2.4 GHz
Dual-Band Wi-Fi: 2.4 & 5GHz
Radar: 61.5 GHZ.
Temperature Setting Range:
Heating: 40 to 90 °F (4.5 to 32 °C).
Cooling: 50 to 99 °F (10 to 37 °C).
Adjustable high and low range-stop settings
Humidification Setting Range:
0% to 90% RH.
Dehumidification Setting Range:
10% to 100% RH.
Humidity Sensor Accuracy:
± 5% RH from 30% to 50% RH at 75 F.
Clock Accuracy:
1 minute per month at 77 °F (25 °C). ± 2 minutes per month over the operating ambient temperature range. Automatically updates when connected to WiFi router and registered to account.
Terminal Designations
Terminals on X8S & X8Q Smart Thermostat
|
Conventional Systems |
Heat Pump Systems |
||
|
Terminal |
Description |
Terminal |
Description |
|
S/S |
Not used by this thermostat. |
S/S |
No used by this thermostat. |
|
Y |
Compressor Stage 1 |
Y |
Compressor Stage 1 |
|
Y2 |
Compressor Stage 2 |
Y2 |
Compressor Stage 2 |
|
G |
Fan Relay |
G |
Fan Relay |
|
C |
24VAC Common wire from secondary side of cooling transformer (if 2 transformers) |
C |
24VAC Common wire from secondary side of cooling transformer |
|
K* |
Connect to K on C-wire adapter |
K* |
Connect to K on C-wire adapter |
|
U/U |
Relay for humidifier, dehumidifier, ventilator. |
U/U |
Relay for humidifier, dehumidifier, ventilator. |
|
L/A |
Not used by this thermostat. |
L/A |
Heat pump fault |
|
W |
Heat Stage 1 |
O/B |
Changeover valve for heat pumps |
|
W2 |
Heat Stage 2 |
AUX |
|
|
|
|
E |
E not used by this thermostat. Auxiliary / emergency heat wire should go to AUX. |
|
R |
24 VAC Heating transformer |
R |
24 VAC Heating transformer |
|
Rc |
24 VAC Cooling transformer |
Rc |
24 VAC Cooling transformer |
* The THP9045A C-wire adapter is used on heat/cool systems when you only have four wires at the thermostat and you need an extra wire for a common wire. Use the K terminal in place of the Y and G terminals on conventional or heat pump systems to provide control of the fan and the compressor through a single wire the unused wire then becomes the common wire. See THP9045A instructions for more information.