PCT503-W Technical Specifications

Compatibility

Compatibility
Compatible systems • 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
Wi-Fi • 0.1° C, 0.2° F
• ±1°C
• 0.5° C, 1° F
• 0 to 100% RH
• ±4% Accuracy through the range of 0% RH to 80% RH
• 18 seconds to reach 63% of the next step value
RF Power • 17dBm@11b, 14dBm@11g ,13dBm@11n
Sensitivity @PER • 1M: -92dBm@8%PER
• 6M: -88dBm@10%PER
• 11M:-86dBm@8%PER
• 54M:-72dBm@10%PER
• 72.2M:- 68dBm@10%PER
OTA • Over-the-Air Upgradable
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