Products Description
| Product Name | Yk 025-29139-000 Pressure Sensor |
| Model | 025-29139-000 |
| Applicable Industries | Construction and Commercial |
| Application | Refrigeration compressor |
| Packaging | Cardboard Box |
| MOQ | 1 Piece |
Core Product Functions:
1. Precise, Real-Time Monitoring of High-Pressure Compressor Discharge (Core Function)
Continuously captures high-pressure discharge signals and transmits them to the main controller; serves as the critical basis for electronic expansion valve flow regulation, compressor load unloading, and high-pressure shutdown protection, preventing compressor burnout due to high-pressure overload.
2. Multiple High-Pressure Safety Interlock Protections
High pressure approaching threshold: The unit automatically reduces compressor load and increases fan speed to relieve pressure.
Excessive pressure: The main controller triggers a high-pressure fault alarm and locks out the compressor (shutdown) to prevent the risk of pipeline rupture.
3. Silicone Oil Isolation & Vibration Damping (Eliminates Signal Jitter/False Alarms)
Features a composite diaphragm and silicone oil buffer structure that absorbs compressor vibrations and pipeline pressure spikes; ensures stable pressure readings on the touchscreen and prevents frequent, random high-pressure protection shutdowns.
4. Automatic Temperature Compensation Across a Wide Range (Stable Control Accuracy Year-Round)
Maintains constant pressure measurement accuracy from low-temperature startup (-40°C) to high-temperature full-load operation (120°C), ensuring no efficiency loss for units operating in both cooling and heating modes.
5. Standardized Quick-Connect Fittings (Simplified Maintenance & Replacement)
No wiring or welding required; simply unplug the wire harness and unscrew the threaded base for complete unit replacement. A single technician can complete the repair in 5 minutes, significantly reducing downtime for maintenance.
6. Optimized for R410A High-Pressure Refrigerant
Diaphragms, seals, and silicone oil are all optimized for the high-pressure characteristics of R410A; prevents issues such as media-induced swelling or diaphragm deformation/failure, making it suitable for air-cooled heat pump systems operating in both cooling and heating cycles.
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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, Yk, 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. |
Standard Installation and Replacement Specifications
1. Installation Location: Compressor high-pressure discharge branch line; install with threads facing vertically upward to ensure the silicone oil makes full contact with the diaphragm, and leave sufficient clearance for wrench operation.
Pre-installation Safety Measures
Shut down the entire unit, recover refrigerant from the high-pressure side piping, and vent pressure to atmospheric levels; disconnect the unit’s 380V main power supply and wait for the main control capacitors to fully discharge.
2. Assembly Steps
① Unplug the black waterproof wiring harness connector, use a wrench to unscrew the old 025-29139-001 sensor, and clean the base threads of any sludge, rust, or debris;
② Verify the model of the new sensor, wrap the threads with a small amount of refrigerant-resistant PTFE tape, screw it in by hand, and then tighten slightly with a wrench (do not use excessive force, which could strip threads or damage the base);
③ Reconnect the 3-pin waterproof wiring harness, ensuring the connector latch is fully locked and the connection is secure;
④ Perform a nitrogen pressure test at 400 PSI and hold for 30 minutes; the installation is considered successful if there are no refrigerant bubbles or leaks at the threaded connection;
⑤ Evacuate the piping and charge with refrigerant; run the unit at no-load for 10 minutes and verify that the high-pressure reading on the touchscreen is stable and free of fluctuations; run at full load for 30 minutes and verify stable expansion valve operation and the absence of high-pressure fault alarms.
3. Criteria for Replacement
Touchscreen shows no high-pressure value or a fixed, unchanging value; main control reports an open-circuit or out-of-range sensor fault;
Pressure readings fluctuate erratically, causing the unit to shut down frequently due to random high-pressure protection trips;
Continuous refrigerant leakage (bubbling) at the sensor threads; internal isolation diaphragm is corroded or damaged;
Severe signal drift due to long-term use; high-pressure protection and load-unloading logic are disrupted and cannot be calibrated. 4. Usage Precautions
Do not use the 025-29139-002 low-pressure sensor interchangeably with other models; a mismatch in measurement range or output curve can easily lead to chip failure under high-pressure conditions. Do not install the sensor upside down or horizontally, as silicone oil leakage or trapped air pockets can cause significant reading errors. Strictly prohibit connecting or disconnecting the wiring harness while the unit is powered, as voltage surges can damage the internal sensor chip.
