🔧 NIBE Expansion Valve – 035019

Model: TLEX-E0662
Refrigerant: R407C
Valve Type: Thermostatic Expansion Valve (TXV)
Adjustment: Factory pre-set (non-adjustable)

✅ Compatible NIBE Models

This expansion valve is designed to work with a wide range of NIBE ground source heat pumps, particularly in the 8.5 kW to 12 kW range. It ensures precise refrigerant flow for efficient thermal exchange and system protection.

Compatible Units:

• NIBE F1110 – 8.5 kW

• NIBE F1115 – 8.5 kW

• NIBE F1125 – 10 kW

• NIBE F1135 – 10 kW

• NIBE F1210 – 8.5 kW

• NIBE F1215 – 8.5 kW

• NIBE F1235 – 10 kW

• NIBE F1145 – 10 kW / 12 kW

• NIBE F1245 – 10 kW / 12 kW

⚠️ Common Faults Linked to Expansion Valve Issues

Expansion valves play a critical role in regulating refrigerant flow into the evaporator. A faulty or inefficient valve may result in:

• LP Alarms (Low Pressure): Insufficient refrigerant feed due to internal blockage or malfunction.

• Reduced Heating Output: A direct result of underfeeding refrigerant to the evaporator.

• Compressor Strain: Leading to premature wear if low-pressure conditions persist.

• System Cycling / Start-Stop Behaviour: Caused by incorrect superheat due to malfunctioning valve behavior.

📦 Technical Notes

• Non-adjustable – designed for specific system capacity and refrigerant (R407C)

• Factory-calibrated for optimal superheat in the designated model range

• Typically installed with external equalisation (check NIBE technical documentation)

• Copper connections for brazing installation