Daikin Water Chiller WSC076

Warning: This procedure requires trained personnel with PPE!

Is the valve closest to the valve stem leaking?

If yes, back seat the three-way valve all the way, closing the port to the leaking pressure relief valve.

Was the faulty pressure relief valve successfully removed and replaced?

Is the relief valve farthest from the valve stem leaking?

If yes, front seat the three-way valve.

Was the relief valve successfully replaced?

The refrigerant must be pumped down into the condenser before the evaporator relief valve can be removed.

Was the refrigerant successfully pumped down into the condenser?

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.

Loss of the entire refrigerant charge?

Enter the pressure after charging refrigerant

Enter the pressure after adding dry nitrogen

Leak test with an electronic leak detector passed?

Water flow through the vessels maintained?

Any leaks found in welded or brazed joints?

Is it necessary to replace a gasket?

Relieve the test pressure in the system before proceeding if any leaks are found or it is necessary to replace a gasket.

Clean Oil Cooler Strainer (water)

Upload the results of the Oil Analysis

Oil filter change and compressor teardown and inspection should be done based on the results of the annual oil test performed by a company specializing in this type of test.

Enter the name of the company that performed the oil test

Sign off on the lubrication system maintenance

Warning: This procedure 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)

Note: Benchmark readings should be taken during startup and then periodically afterward.

Enter the condenser pressure drop

Is the approach increase two-degrees or more?

If yes, excessive tube fouling could be present.

Warning: This procedure requires trained personnel with PPE!

Daikin chillers are at positive pressure at all times and do not leak contaminated moist air into the refrigerant circuit, thereby eliminating the need for annual oil changes.

An annual laboratory oil check is recommended to check overall compressor condition.

Isolate the filter cavities. Close the oil discharge line service valve at the oil pump (at the filter on CE126).

Remove the filter cover; some foaming can occur but the check valve should limit leakage from other compressor cavities.

Remove the filter, replace with new element, and replace filter cover using a new gasket.

Reopen the valve in the pump discharge line and purge air from the oil filter cavity.

When machine is operated again, the oil level must be checked to determine if oil needs to be added to maintain the proper operating level.

Sign off on the oil filter replacement