Carrier Container Refrigeration Unit 69NT40-511-12

Ensure compliance with local environmental laws and regulations

Set the controller set point to -25°C (-13°F)

Ensure the suction modulation valve is fully open

Verify container temperature is approximately 1.7°C (35°F) or -17.8°C (0°F)

Connect the gauge manifold to the compressor service valves

Select unit type for refrigerant level check

Enter the compressor discharge pressure

Turn off power and remove power plug

Remove screws securing the panel covering the evaporator section

Disconnect the defrost heater wiring

Disconnect the sensor from the coil

Turn unit start-stop switch OFF

Frontseat both suction and discharge service valves to isolate compressor

Remove the refrigerant from the compressor

Disconnect wiring from defective switch

Remove the high pressure switch by turning counterclockwise

Ensure excess capillary tube is secured to the power head assembly and wrapped with 'Presstite'.

Ensure thermal bulb is tightly secured to the suction line and wrapped with 'Presstite'.

Pump down the unit per section 6.3.

Remove insulation (Presstite) from expansion valve bulb and power assembly and then remove thermal bulb from the suction line.

Loosen flare nut and disconnect equalizing line from expansion valve.

Remove capscrews and lift off power assembly and remove cage assembly.

Check for foreign material in valve body.

Turn unit OFF and disconnect power source

Remove upper back panel and bulb clamps securing bulb to unit

Remove two flange screws from recording thermometer and feed capillary and element through the unit

Push replacement bulb end and capillary through the unit

Fill slots with silastic (RTV432, Dow Corning)

Attach bulb clamps tightly to bulb

Connect element flange to recorder ensuring hub of flange faces out to fit into the hole in instrument case

Install inlet air grille and upper panel