Advanced Temperature and Humidity Control for AHU Applications
Improving air quality with Air Handling Units (AHUs)
Air handling units are an effective method for maintaining high air quality in buildings. Any business must have high-quality air to ensure optimal production and the safety and wellness of its employees. AHUs are primarily installed on the floors, roofs, or basements of medium-sized to large commercial and industrial buildings.
Common Challenges Faced by the AHU/HVAC Users
Discomfort and Poor Indoor Air Quality
- Caused by inaccurate or drifting Temperature and Relative Humidity (T+Rh) sensor readings.
Integration Difficulties
- Complications in integrating multiple system components smoothly.
Resulting Impacts:
- Increased setup and commissioning time.
- Frequent troubleshooting requirements.
- Higher maintenance efforts and operational costs.
- Risk of unplanned system shutdowns.
- Reduced overall system lifespan.
- Ineffective humidity control due to inconsistent relative humidity measurements.
Instruments for AHU/HVAC Applications
Temperature and Humidity Sensor
HS-440 / HTS-440
Features
- Accurate capacitive sensor for relative humidity (RH).
- Accurate Pt-100 sensor for temperature.
- Operates on low voltage / low current.
- Direct voltage output is proportional to the RH
Temperature and Humidity Transmitter
HTX-440 / TTX-440
Features
- Accurate capacitive sensor for RH.
- Accurate Pt-100 / Class A element for temperature sensing.
- Provides output of 4-20mA / 0-10 V for Temperature and RH.
- The 4-20 mA/0-10 V output and power supply ground are electrically isolated.
Air Handling Unit Controllers
DTH-966-AHU / DTH-948
Features
- User-programmable settings.
- Dual display for simultaneous indication of temperature (T) and relative humidity (RH).
- Field-proven algorithm, tested successfully for various AHU / HVAC control applications.
Thyristor Power Regulator
POW-12-PA-CL
Features
- Auto-detection of phase sequence and self-synchronisation.
- Forced cooling in 21 KW models and above.
- Overheat protection.
- Built-in Current Control and overload protection.
Control Panel for AHU
Temperature and Humidity Control Panel
This compact control panel integrates all essential components for precise temperature and humidity control, including:
- DTH-966-AHU Temperature & Humidity Controller
- HTX-440-DM Sensor/Transmitter
- POW-3-PA-XX Thyristor for Power Regulation
- Built-in switchgear and meters for safe and reliable operation
Key features
- Three-phase supply monitoring with indicator lamps
- Analogue current meters for each heater phase
- Heater On/Off switch with status lamp
- Auto/Manual mode selection for Building Management System (BMS) or manual control
- Internal fan and filter for proper ventilation and cooling
- Wall-mountable design with bottom gland plate for wiring
- Front-access door with dust-sealing rubber gasket
This control panel is ideal for HVAC applications that require precise temperature and humidity control.
