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