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Nordyne 669550R 3.3-Ton Thermal Expansion Valve (TXV) TR6 R-22

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Special Price $147.48 Regular Price $169.60

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SKU

669550R

The Nordyne 669550R is a 3.3-Ton Thermal Expansion Valve (TXV) TR6 R-22 an essential part of air conditioning and refrigeration systems that regulate the refrigerant. In its operation, it senses the temperature and pressure of the refrigerant at the exit and adjusts to the valve opening to achieve optimum refrigerant flow. This control allows enhancing heat flow without overloading the system and also without undercooling. The TXV is designed for R-22 refrigerant and is applied in most of the household and commercial air conditioning systems and refrigeration equipment. The benefits include the enhancement of system effectiveness, reduced power consumption, and improved performance, which leads to comfortable and inexpensive environment.

Categories: HVAC Controls & Electrical, Valves

Manufacturer:

Nordyne

Specifications

Type: Thermal Expansion Valve
Capacity: 3.3 Ton

Refrigerant: R22
Compatible: TR6

Details

PRODUCT OVERVIEW:
Functioning as a liquid-metering control device within cooling systems, the Nordyne 669550R 3.3-Ton Thermal Expansion Valve (TXV) TR6 R-22 is an OEM component that regulates the admission rate of liquid refrigerant into the evaporator coil. Positioned at the coil inlet, this valve serves as the physical pressure boundary separating the high-pressure liquid line from the low-pressure balance area of the refrigeration circuit.

VALVE SENSING ELEMENT RESPONSE:
Changes in evaporator outlet conditions cause the sensing element to produce a corresponding pressure response within the valve's operating mechanism. This response acts against the internal forces controlling the metering assembly and changes its position. The resulting adjustment allows the TXV to respond to variations in evaporator conditions.

REFRIGERANT INLET AND OUTLET FLOW CONTROL:
Between the liquid-line inlet and evaporator-side outlet, the internal metering assembly regulates refrigerant movement through the valve. Its opening changes according to operating conditions, controlling the quantity of refrigerant entering the evaporator. This arrangement maintains a controlled transition between the upstream liquid line and the evaporator circuit.

REPLACEMENT GUIDELINES:
Replacement may be appropriate when the valve becomes restricted, sticks, leaks refrigerant, or fails to regulate refrigerant flow correctly. A malfunctioning TXV can cause insufficient or excessive refrigerant feed into the evaporator and interfere with normal system operation. Replacing the Nordyne 669550R restores controlled refrigerant metering through the applicable evaporator circuit.

Common Failure Symptoms:

Frost buildup along the liquid line or coil distributor tubes due to restricted refrigerant flow.
Abnormally high suction line superheat readings caused by persistent refrigerant underfeeding.
Compressor liquid floodback or low superheat resulting from an internally stuck-open valve.
Fluctuating suction and discharge pressures during steady cooling operation.

EQUIPMENT COMPATIBILITY:
The Nordyne 669550R 3.3-Ton Thermal Expansion Valve (TXV) TR6 R-22 is an OEM component intended for applicable Nordyne air conditioning and refrigeration equipment using R-22 refrigerant. Before purchasing, verify the equipment model, evaporator configuration, refrigerant type, system capacity, and manufacturer-approved TXV requirements to confirm proper application.

Technical Specifications:
Product identification:
Brand: Nordyne
Part Number: 669550R
Product Type: Thermal Expansion Valve (TXV)
Valve Series: TR6
Operating conditions:
Refrigerant Type: R-22
Flow & capacity specifications:
Capacity: 3.3 Ton

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Product Questions (15)

Customer Questions

What role does the adjustable superheat feature play in a heating system, and how can it be adjusted for optimal performance?

The adjustable superheat feature ensures that the refrigerant evaporates completely, maximizing heating efficiency. HVAC technicians can adjust it to fine-tune the system's performance by monitoring temperature differentials.

How does the TXV valve contribute to improved comfort in a heating system, and what benefits can homeowners expect to experience?

The TXV valve's precise control helps maintain consistent indoor temperatures, reducing temperature fluctuations and ensuring a more comfortable living environment during the heating season.

Are there specific maintenance requirements or best practices for homeowners to ensure the longevity and optimal performance of the TXV valve?

While relatively low maintenance, regular professional maintenance is advisable. Homeowners can ensure proper airflow, monitor temperature differentials, and schedule routine HVAC maintenance to keep the valve performing optimally.

What maintenance is required for the Nordyne 669550R Thermal Expansion Valve?

Inspect the TXV for leaks, corrosion, or blockages regularly to maintain proper refrigerant flow. Clean the inlet strainer if accessible, and ensure proper insulation around refrigerant lines. Check system pressures during routine HVAC maintenance to prevent efficiency loss.

What are common issues with the Nordyne 669550R Thermal Expansion Valve?

Improper refrigerant flow.
Valve sticking or not modulating correctly.
Leaks or corrosion at connections.
Pressure fluctuations or uneven cooling performance.

What operating conditions can indicate a thermal expansion valve issue?

Incorrect refrigerant metering or changes in expected refrigeration operation can indicate a valve-related issue.

How does a thermal expansion valve regulate refrigerant flow?

It varies its metering opening in response to changing refrigerant conditions to control refrigerant flow into the refrigeration circuit.

Why must the refrigerant specification correspond with the expansion valve?

Valve operation depends on refrigerant-specific pressure and temperature characteristics, so the specified refrigerant must correspond with the applicable refrigeration system.

What role does a thermal expansion valve play in relation to the evaporator?

The valve meters refrigerant into the evaporator, where the refrigerant absorbs thermal energy from the conditioned air or surrounding medium.

What does the TR6 designation identify on the 669550R thermal expansion valve?

The TR6 designation forms part of the valve's model identification and configuration within the applicable refrigeration application.

What does the Nordyne 669550R thermal expansion valve do?

The Nordyne 669550R regulates liquid refrigerant entering the evaporator to control refrigerant feed according to changing operating conditions.

How does the Nordyne 669550R regulate refrigerant admission?

The TXV adjusts its internal metering opening in response to evaporator conditions, controlling the amount of refrigerant entering the evaporator.

What role does the sensing mechanism play in a thermal expansion valve?

The sensing mechanism responds to changes at the evaporator outlet and influences the valve's metering position to adjust refrigerant flow.

How does the Nordyne 669550R support evaporator operation?

By modulating refrigerant admission according to evaporator conditions, the valve helps maintain appropriate refrigerant vaporization through the cooling cycle.

What maintenance does the Nordyne 669550R thermal expansion valve require?

The TXV should be inspected during routine system service for proper refrigerant flow, leakage, restriction, and visible signs of damage.