Trenton Refrigeration Products Condensing Unit TEHA008L6

Select the method used to measure suction pressure

Enter the suction pressure at the bulb location

Enter the temperature of the suction line at the thermostatic expansion valve bulb location

Saturated Temperature Conversion

Convert the suction pressure to saturated evaporator temperature using a Pressure-Temperature chart and enter the value

Calculate and enter the actual superheat at the evaporator (subtract saturated temperature from actual suction line temperature)

Ensure a qualified refrigeration mechanic is present

Verify all installations are complete

Is the compressor performance satisfactory during the initial start-up?

Monitor the performance of moving components

Is the compressor performance satisfactory throughout the first operating cycle?

Are all moving components functioning correctly during the first day?

Pressurize the system to a maximum of 150 psig (1136 kPa) with dry nitrogen

Is the system free of major leaks?

Detailed Leak Testing for A1 Refrigerants

Discharge the initial dry nitrogen charge and add refrigerant to raise the system pressure up to 10 psig (170 kPa)

Add dry nitrogen to increase the system pressure to a maximum of 150 psig (1136 kPa)

Use an electronic leak detector to check for leaks

Hold the pressure for a minimum of 12 hours

Recheck the system for leaks after 12 hours

Verify all connections are tight

Check compressor crankcase oil level (if equipped with sight glass)

Ensure proper installation of compressor components

Check that compressor discharge and suction shut-off valves are open

Ensure all pressure and safety controls are adjusted properly

Check and adjust room thermostat for normal operation

Compressor Suction Superheat Measurement

Measure the suction pressure at the suction service valve of the compressor

Measure the suction temperature of the suction line about 6 inches (15 cm) back from the compressor suction valve using an accurate thermometer

Calculate the actual superheat at the compressor

Is the suction superheat within the range of 20 to 45 °F (11.2 to 25.2 °C)?

Adjustment of Suction Superheat

Is adjustment to the suction superheat required?

Select the method used for adjusting the suction superheat