▶ Main Features
• Compatible with 2H/2C multi-stage conventional and multi-stage heat pump HVAC systems
• Supports 24VAC residential and light commercial HVAC applications
• 4-period and 7-day programmable scheduling via the thermostat or Tuya Smart app
• Automatic heat/cool changeover and one-touch AWAY mode for improved energy savings
• Wi-Fi remote control through the Tuya Smart platform, allowing multiple thermostats to be managed from a single mobile app
• 3.5-inch TFT color display with an intuitive user interface and setup wizard for easy installation and operation
• Motion-activated display and smart rotary control wheel for a better user experience
• Compressor short-cycle protection and power outage protection for reliable HVAC operation
• Supports OTA firmware updates and provides API support for OEM and smart building integration
▶ Typical Applications
The PCT503 WiFi Multi-Stage Thermostat is designed for residential and light commercial HVAC projects that require programmable temperature control, reliable WiFi connectivity, and multi-stage system compatibility.
It is ideal for:
Residential HVAC upgrades replacing traditional single-stage thermostats with smart multi-stage control
Heat pump and multi-stage HVAC systems requiring programmable heating and cooling schedules
Smart homes, apartments, and villas with remote temperature management through the Tuya Smart app
Small offices and retail spaces seeking improved comfort and energy efficiency
HVAC contractors and retrofit projects requiring easy installation and reliable 24VAC thermostat replacement
HVAC OEM manufacturers and system integrators developing connected HVAC and smart building solutions
▶ Product
▶ Video
Which WiFi Thermostat Is Right for Your HVAC Project?
Not sure which thermostat best fits your HVAC project?
Compare the key features of OWON's WiFi thermostat series to find the right model for residential, multi-family, hospitality, OEM, and light commercial applications. Whether you need a cost-effective programmable thermostat or an advanced model with remote sensors, energy reports, and occupancy sensing, there's a solution for every project.
| Model | PCT 503 | PCT 513 | PCT 5231 | PCT 533 |
| Wireless | ZigBee/Wi-Fi | Wi-Fi | Wi-Fi | Wi-Fi |
| Conventional Compatibility | 2H/2C | 2H/2C | 2H/2C | 2H/2C |
| Heat Pump Compatibility | 4H/2C | 4H/2C | 4H/2C | 4H/2C |
| Display Size | 3.5” color LCD | 4.3” full-color Touchscreen | 3" LED Display | 4.3" Full-Color Touchscreen |
| Interaction | Physical Buttons + Rotary Knob | Touchscreen | Touch-sensitive buttons | Touchscreen |
| Screen Resolution | 480 x 320 | 480 x 272 | / | 800 x 480 |
| Occupancy Sensing | PIR | PIR | Optional Radar Occupancy Sensor | Built-in Radar Occupancy Sensor |
| 7-day Programming | Fixed 4-period per day | Fixed 4-period per day | Up to 8 periods per day | Up to 8 periods per day |
| Terminal Blocks | Screw Type | Screw Type | Press Type | Press Type |
| Remote Sensor Compatible | × | √ | √ | √ |
| Preheat / Precool | × | √ | √ | √ |
| Smart Alerts | × | × | √ | √ |
| Adjustable Temperature Swing | × | × | √ | √ |
| Energy Usage Reports | × | × | √ | √ |
| Temp Presets | × | × | √ | √ |
| Built-in IAQ monitor | × | × | × | Optional |
| Humidifier / Dehumidifier Control | × | × | × | Two-terminal control |
| Professional Installation Features | × | × | × | √ |
Looking for advanced features such as remote room sensors, energy usage reports, or occupancy sensing?
Explore the PCT5231 and PCT533 models for larger HVAC projects and smart building applications.
FAQ:
Q1: What HVAC systems is the PCT503 compatible with?
A: The PCT503 is compatible with most 24VAC multi-stage conventional and heat pump HVAC systems. It supports up to 2H/2C conventional systems and up to 4H/2C heat pump configurations, including auxiliary heat and dual fuel applications, making it suitable for residential and light commercial HVAC installations.
Q2: Is the PCT503 a programmable thermostat?
A: Yes. The PCT503 is a WiFi multi-stage programmable thermostat featuring 4-period daily scheduling and 7-day programming. Schedules can be configured directly on the thermostat or remotely through the mobile app for improved comfort and energy efficiency.
Q3: Can the PCT503 replace an existing multi-stage thermostat?
A: In most cases, yes. The PCT503 is designed as a replacement for compatible 24VAC multi-stage HVAC thermostats. Before installation, the existing wiring and HVAC system configuration should be verified to ensure compatibility.
Q4: Does the PCT503 support WiFi remote control?
A: Yes. The PCT503 connects to the Tuya Smart platform via WiFi, allowing users to remotely adjust temperature, change operating modes, create schedules, and monitor HVAC operation from a compatible mobile device.
Q5: How do I choose between the PCT503, PCT5231, and PCT533?
A: The PCT503 is ideal for projects requiring reliable multi-stage programmable HVAC control. For applications needing remote room sensors, energy usage reports, and smart alerts, the PCT5231 offers more advanced functionality. If humidity control, radar occupancy sensing, and premium commercial features are required, the PCT533 is the recommended choice.
Shipping
▶ Main Specification:
|
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 |
