Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your LDGSUPH 2/4 Pipe Fan Coil Room Thermostat, Model TYBAC-006. This device is designed to precisely control the temperature in your environment for both heating and cooling applications, compatible with 12VAC, 24VAC, and 95-240VAC systems. Please read this manual thoroughly before installation and use to ensure proper function and safety.
Safety Information
- Always disconnect power to the HVAC system before installing or servicing the thermostat.
- Installation should be performed by a qualified electrician or HVAC technician.
- Ensure all wiring connections comply with local electrical codes and the provided wiring diagram.
- Do not expose the thermostat to water or excessive humidity.
- Do not attempt to disassemble or repair the thermostat yourself. Contact qualified personnel for service.
Product Overview
The LDGSUPH TYBAC-006 thermostat features digital temperature control for enhanced precision and stability. Its user-friendly interface allows for easy temperature setting and programming, contributing to energy efficiency. The backlit digital display ensures clear readability and operation, even in low-light conditions. Constructed with precision components, this thermostat offers reliable long-term performance.
Display and Dimensions
The thermostat features a clear digital display showing current temperature, set temperature, operating mode, fan speed, and time. Capacitive touch buttons allow for intuitive control.

Specifications
| Model Number | TYBAC-006 |
| Power Supply | 95 ~ 240 VAC, 50 ~ 60HZ (also compatible with 12VAC, 24VAC variants) |
| Wattage | 5W |
| Fan Relay Amps (Resistance) | 5A |
| Fan Relay Amps (Inductive) | 3A |
| Valve Relay Amps (Resistance) | 3A |
| Valve Relay Amps (Inductive) | 1A |
| Sensor | NTC3950, 10K |
| Accuracy | ±0.5°C |
| Ambient Temperature | 0~45°C |
| Ambient Humidity | 5 ~ 95 % RH (Non Condensing) |
| Buttons | Capacitive Touch Buttons |
Installation
Proper installation is crucial for the thermostat's performance and safety. Ensure power is disconnected before proceeding.
Mounting
- Turn off power at the circuit breaker or fuse box to avoid electrical shock.
- Remove the front panel of the thermostat to expose the mounting holes and wiring terminals.
- Mount the thermostat base to a standard electrical junction box using the provided screws. Ensure it is level.
Wiring
- Refer to the wiring diagram specific to your HVAC system (2-pipe or 4-pipe) and voltage (12VAC, 24VAC, or 95-240VAC).
- Connect the wires from your HVAC system to the corresponding terminals on the thermostat base. Ensure connections are secure.
- Once wiring is complete, carefully reattach the front panel to the thermostat base.
- Restore power to the HVAC system.
Operation
The thermostat is designed for intuitive operation. Here are the basic functions:
Power On/Off
Press the power button (usually indicated by a circle with a vertical line) to turn the thermostat on or off.
Setting Temperature
Use the up (∧) and down (∨) arrow buttons to adjust the desired temperature. The set temperature will be displayed on the screen.
Mode Selection
Press the mode button (often indicated by a snowflake for cooling, sun for heating, or fan icon) to cycle through available operating modes: Heating, Cooling, Fan Only, or Auto.
Fan Speed Control
Press the fan speed button (often indicated by fan blades or bars) to select desired fan speed: Low, Medium, High, or Auto.
Programming Schedule
The thermostat supports programmable schedules to optimize comfort and energy savings. Refer to the on-screen prompts and specific icons (e.g., MON, TUE, WED, THU, FRI, SAT, SUN) to set daily or weekly schedules. This typically involves setting different temperatures for various times of the day (e.g., wake, away, home, sleep).
Maintenance
Your thermostat requires minimal maintenance to ensure optimal performance.
- Cleaning: Gently wipe the thermostat's surface with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Inspection: Periodically check for any loose connections or signs of wear. If any issues are found, contact a qualified technician.
Troubleshooting
If you encounter issues with your thermostat, refer to the table below for common problems and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Thermostat has no power/display is blank. | No power supply; loose wiring; tripped circuit breaker. | Check circuit breaker; ensure power is on; verify wiring connections. |
| HVAC system not responding to thermostat settings. | Incorrect mode selected; wiring issue; system malfunction. | Verify correct mode (heating/cooling/fan); check wiring; consult HVAC technician. |
| Temperature reading appears inaccurate. | Thermostat located near heat source/draft; sensor issue. | Relocate thermostat if possible; ensure no obstructions; contact support if problem persists. |
| Cannot change settings. | Keypad locked; programming mode active. | Check for a lock icon on the display and unlock if necessary; exit programming mode. |
If the problem persists after attempting these solutions, please contact customer support or a qualified HVAC technician.
Warranty and Support
LDGSUPH products are manufactured to high-quality standards. For warranty information, technical support, or service inquiries, please refer to the documentation provided with your purchase or visit the official LDGSUPH website. Keep your purchase receipt as proof of purchase for warranty claims.