Products Description
| Product Name | Carrier HH79NZ047 Threaded-Insert Temperature Sensor |
| Model | HH79NZ047 |
| Applicable Industries | Construction and Commercial |
| Application | Refrigeration compressor |
| Packaging | Cardboard Box |
| MOQ | 1 Piece |
Core Product Functions:
Precise Acquisition and Display of Chilled/Cooling Water Temperatures
The probe is fully immersed in the water circuit sleeve to accurately measure supply and return water temperatures. Real-time display on the panel provides a reference for the main control PID logic, regulating the compressor slide valve (0–100% load) to stabilize the chilled water outlet temperature.
Anti-Freeze Safety Interlock
If the water temperature drops below the anti-freeze threshold, a sudden change in NTC resistance triggers the unit’s anti-freeze protection; this locks out the compressor and activates pipeline heat tracing to prevent the water circuit from freezing and bursting in winter.
Auxiliary Logic for Water Flow Fault Detection
The mainboard monitors for abnormal temperature differentials between supply and return lines or a lack of temperature fluctuation over time; in conjunction with the water flow switch, it identifies pump shutdowns or circuit blockages and triggers a water flow fault alarm.
Evaporator Superheat Stabilization via Electronic Expansion Valve (EEV)
Working with high/low-pressure sensors (00PPG series), the system dynamically adjusts refrigerant flow through the ETS electronic expansion valve to prevent evaporator icing and compressor liquid hammer.
Rapid Fault Self-Diagnosis and Reporting
The main controller detects anomalies—such as open circuits, short circuits, or resistance values outside the standard range—and reports a water temperature sensor fault. The unit shuts down under load-limiting protocols, enabling rapid identification of wiring or probe failures.
Immersion-Type Temperature Sensing (Superior Accuracy vs. Clamp-on Probes)
Direct contact with the water eliminates thermal conduction losses caused by pipe-wall scale, resulting in lower measurement error—ideal for the high-precision temperature control requirements of water-cooled units.
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Technical parameter
Company Profile
Factory Profile
| Q1:For refrigeration industry, which brands are your products covering? | A1:We produce filter element replacements for brands like,Bitzer, Carrier, York, McQuay, Trane, etc… |
| Q2:Does the price include freight? | A2:The quotation is usually the factory price. We can recommend the most economical logistics plan and calculate the freight according to your destination and quantity. |
| Q3:How to ensure product quality? | A3:We have a strict quality control process, and we will carry out multiple inspections before the products leave the factory to ensure that they meet the standards. |
| Q4:Why choose us? | A4:Product reliability: We are a professional manufacturer . can offer high-quality products at the most competitive prices. Technical support: We provide technical assistance. Industry experience: We have over 10 years of experience in the refrigeration equipment service field. After-sales service: We offer professional after-sales service. Team collaboration: We have a professional team that can provide you with prompt services and delivery schedules. |
Product Installation and Precautions:
Disconnect power to the entire unit and wait for the main control capacitors to fully discharge before connecting or disconnecting plugs; static electricity can easily damage the motherboard’s data acquisition chip.
Drain any accumulated water or scale from the temperature-sensing thermowell and fully insert the probe rod to the bottom of the well to ensure adequate contact with the water.
Apply a thin layer of refrigeration-grade sealant to the threads; do not use excessive PTFE tape, as loose fragments can jam the probe rod and cause inaccurate temperature readings.
Route the wiring harness away from variable frequency drives (VFDs) and high-power contactor busbars, and keep it clear of high-temperature heat sources to prevent insulation degradation.
Ensure waterproof plugs are fully inserted and the locking clips are secured to prevent condensation from seeping in and corroding internal terminals.
Power on the unit and monitor the panel display to ensure the water temperature changes steadily in response to system load and that no sensor fault alarms occur.
