Products Description Capillary-Type Liquid Temperature Sensor Protector for HVAC Equipment, bimetallic temperature protector designed for HVAC equipment. It features a durable brown plastic housing with a central cross-slot adjustment or mounting point, a brass-colored capillary tube, and a...
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Capillary-Type Liquid Temperature Sensor Protector for HVAC Equipment,bimetallic temperature protector designed for HVAC equipment. It features a durable brown plastic housing with a central cross-slot adjustment or mounting point, a brass-colored capillary tube, and a coiled spring probe. It functions as a safety thermal cut-off or defrost thermostat, automatically interrupting the circuit when temperatures exceed or drop below set limits to prevent equipment damage.
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Product model |
WY90-11S |
| Technical Parameter | Specification |
|---|---|
| Rated Voltage | 400 VAC |
| Rated Current (C-1) | 16 A |
| Contact Resistance | ≤50 mΩ |
| Insulation Resistance | ≥100 MΩ |
| Electric Strength | AC 2000 V/min |
| Cut-out Temperature Test | Coil + 25 mm of capillary must be immersed in the liquid |
| Leakage Current | ≤0.2 mA |
| Hi-pot Test | 2000 V/sec @ 0.2 mA |
| Max. Ambient Temperature | 25°C |
| Testing Condition (Liquid) | Temperature changing rate <1°C/2 min |
| Highest Heat Resistance of Main Part | 90°C |
| Highest Heat Resistance of Heat-Sensing Part | OFF + 30°C |
| Manual Reset Temperature | 65°C |
Designed to disconnect the circuit when the monitored temperature reaches the preset OFF point, helping protect HVAC and heating equipment from overheating.
Rated at 400 VAC / 16 A (C-1), making it suitable for applications requiring relatively high switching capacity.
With a 65°C manual reset temperature, the protector can prevent the equipment from automatically restarting after an over-temperature event.
The capillary sensing design allows temperature detection in a liquid environment, making it suitable for temperature protection applications where direct electrical contact with the liquid is not required.
Contact resistance of ≤50 mΩ helps minimize electrical losses and heat generation at the contact point.
Insulation resistance is ≥100 MΩ, providing good electrical insulation between conductive parts.
The unit is tested at 2000 V, providing an additional level of electrical safety and reliability.
Leakage current is limited to 0.2 mA max, helping reduce unwanted current during operation.
| Application | Function |
|---|---|
| HVAC Systems | Over-temperature protection |
| Water Heaters | Liquid temperature sensing and protection |
| Boilers | Overheating protection |
| Liquid Heating Equipment | Temperature monitoring and cut-off |
| Air Conditioning Equipment | Thermal protection |
| Heat Exchangers | Temperature sensing and protection |
| Commercial Heating Systems | Manual-reset temperature protection |
1. What is the WY90 Temperature Protector used for?
The WY90 is designed for over-temperature protection in HVAC systems, water heaters, boilers, liquid heating equipment, and other temperature-controlled applications.
2. How does the WY90 Temperature Protector work?
The protector uses a capillary temperature-sensing system to detect the temperature of the monitored medium. When the temperature reaches the preset OFF point, it disconnects the circuit to help prevent overheating.
3. Does the WY90 have a manual reset function?
Yes. The WY90 features a manual reset function with a reset temperature of 65°C, helping prevent the equipment from automatically restarting after an over-temperature event.
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