Daikin Water Chiller WSC100

Warning: This maintenance check requires trained personnel with PPE!

Enter the leaving water temperature

Enter the saturated refrigerant temperature

Calculate and enter the approach temperature (subtract saturated refrigerant temperature from leaving water temperature)

Note: Daikin's high efficiency heat exchangers have very low design approach temperatures, in the order of one to one and one half degrees F.

Is the approach temperature within the normal range (1-1.5 degrees F)?

If the approach temperature is not within the normal range, it may indicate excessive tube fouling.

Enter the condenser pressure drop

Is the condenser pressure drop within the normal range?

Warning: This maintenance check requires trained personnel with PPE!

Enter the leaving water temperature

Enter the saturated refrigerant temperature

Calculate the approach temperature (subtract saturated refrigerant temperature from leaving water temperature)

Is the approach temperature within the normal range (1 to 1.5 degrees F)?

If the approach temperature is not within the normal range, excessive tube fouling could be present.

Enter the condenser pressure drop

Is the condenser pressure drop within the normal range?

If the condenser pressure drop is not within the normal range, report the issue to the maintenance team.

Maintenance of the refrigerant cycle includes maintaining a log of the operating conditions, and checking that the unit has the proper oil and refrigerant charge.

The suction line temperature at the compressor should be taken at least once a month.

Suction line temperature at the compressor

Warning: Do not use oxygen or a mixture of R-22 and air to build up pressure as an explosion can occur causing serious personal injury.

Enter the initial pressure of the system in psig

Enter the pressure after adding refrigerant in psig

Enter the pressure after adding dry nitrogen in psig

Leak test with an electronic leak detector passed?

Water flow through the vessels maintained during the procedure?

Any leaks found in welded or brazed joints?

Was it necessary to replace a gasket?

If any leaks are found in welded or brazed joints, or it is necessary to replace a gasket, relieve the test pressure in the system before proceeding.

Is the chiller subject to freezing temperatures?

If yes, drain the condenser and chiller of all water.

Did you use dry air to force all water out of the condenser?

Did you remove the condenser heads?

Warning: Water left in the piping and vessels can rupture these parts if subjected to freezing temperature.

Did you circulate antifreeze through the water circuits?

Take measures to prevent the shutoff valve in the water supply line from being accidentally turned on.

Did you remove the pump drain plug in the water pump?