Compatible Systems
RF Characteristics
• 2-stage heater and 2-stage cooling HVAC systems
• Supports natural gas, heat pump, electric, hot water, steam or gravity, gas fireplaces (24 Volts), oil heat sources
• Supports any combination of systems
Heat
• Up to 2 stages
Cool
• Up to 2 stages
Aux Heat
• Up to 2 Stages
Heat Pump
• Up to 2 Stages
• 1 stage + 1 aux
• 1 stage + 2 aux
• 2 stage + 1 aux
• 2 stage + 2 aux
• Dual Fuel Heat Pump
• 4 stage heating (2 compressor, 2 aux heat), 2 stage cooling
Wiring Terminals Definition
RH
• 24VAC primary for heating
RC
• 24VAC primary for cooling
C
• 24VAC common
W1
• 1st stage Primary heating relay / Aux heat
W2
• 2nd stage Secondary heating relay / Aux heat
Y1
• 1st stage Primary cooling compressor contactor
Y2
• 2nd stage Secondary cooling compressor contactor
G
• Fan relay
O/B
• Changeover valve for heat pumps.
*
• Multiple use reserved, including but not limited to: emergency heat line, humidifier control.
S
• Optional wiring module terminal to combine W and G, while reserve an extra in-wall wire to power on the thermostat
HVAC Control Functions
System Mode
• Heat, Cool, Auto, Off, Emergency Heat (Heat Pump only)
Fan Mode
• On, Auto, Circulation
Advanced
• Local and remote setting of the temperature
• Auto-changeover between heat and cool mode (System Auto)
• Compressor short cycle protection delay of 2 minutes
• Failure protection by cutting off all circuit relays thanks to the Super Capacitor
Auto Mode Deadband
• 1.5° C, 3° F
Temp. Sensing Range
• −10°C to 125°C
Temp. Resolution
• 0.1° C, 0.2° F
Temp. Display Accuracy
• ±1°C
Temp. Setpoint Span
• 0.5° C, 1° F
Humidity Sensing Range
• 0 to 100% RH
Humidity Accuracy
• ±4% Accuracy through the range of 0% RH to 80% RH
Humidity Response Time
• 18 seconds to reach 63% of the next step value
Wireless Connectivity
ZigBee
• ZigBee 2.4GHz IEEE 802.15.4, ZHA1.2 Profile, Router Device
Output Power
• +3dBm (up to +8dBm)
Receive Sensitivity
• -100dBm
OTA
• Optional Over-the-Air Upgradable via wifi
WiFi
• Optional
Physical Specifications
Embedded Platform
• MCU: 32-bit Cortex M4; RAM: 192K; SPI Flash: 16M
LCD Screen
• 3.5" TFT Color LCD, 480*320 pixels
LED
• 3-color LED (Red, Blue, Green)
Buttons
• One rotary control wheel, 3 side-buttons
PIR Sensor
• Sensing Distance 5m, Angle 30°
Speaker
• Click sound
Data Port
• Micro USB
DIP Switch
• Power selection
Electrical Rating
• 24 VAC, 2A Carry; 5A Surge 50/60 Hz
Switches/Relays
• Latching type relay, 2A maximum loading
• 1. 1st stage control
• 2. 2nd stage control
• 3. 3rd stage control
• 4. Emergency Heating control
• 5. Fan Control
• 6. Heating/cooling Reverse Valve Control
• 7. Common
Dimensions
• 160(L) × 87.4(W)× 33(H) mm
Mounting Type
• Wall Mounting
Wiring
• 18 AWG, Requires both R and C wires from the HVAC System
Operating Temperature
• 0° C to 40° C (32° F to 104° F)
Storage Temperature
• -30° C to 60° C
Certification
• FCC, CE
