General • Inspections

Daikin Magnitude Magnetic Bearing Centrifugal Chillers(Magnitude WMC-D): Maintenance

Planned maintenance is the best way to avoid unnecessary expense and inconvenience. This procedure will help you check your system, have it inspected at regular intervals by a qualified service technician. The required frequency of inspections depends upon the total operating time and the indoor and outdoor environmental conditions.

MaintainX

08/10/2022

Daikin Magnitude Magnetic Bearing Centrifugal Chillers(Magnitude WMC-D): Maintenance

The following Maintenance Procedures should only be maintained by qualified service personnel.

Chiller Maintenance

DANGER!

Use approved Lock Out/Tag Out procedures to disconnect power from the unit. Wait 20 minutes after disconnecting power from the unit before opening any compressor access covers. The DC link capacitors store enough energy to cause electrocution.

Electrical System

Maintenance of the electrical system involves the general requirement of keeping connections clean and tight. Pump interlocks and flow switches should be checked to be sure they interrupt the control circuit when tripped.

Cleaning and Preserving

A common cause of service calls and equipment malfunction is dirt. This can be prevented with normal maintenance.

The system components most subject to dirt are:

Strainers: Remove and clean strainers in the chilled water system and condenser water system at every inspection.
Condenser Tubes: Inspect the condenser tubes annually for fouling and clean if required. The standard heads should be removed with care due to their weight. One method for handling standard heads follows (only qualified service personnel should perform these tasks): • After draining water, remove all but two head bolts at roughly 10 o’clock and 2 o’clock. • Loosen the remaining two bolts to enable the head to be separated from the tube sheet sufficiently for a clevis pin or hook to be inserted into an open bolt hole at the top of the head. • Attach a hoist to the pin or hook, lift the head to remove weight from the two remaining bolts, remove the bolts, and carefully remove the head. • Do not try to install a machine thread eyebolt into the head vent fitting, which has pipe threads. • Reverse this procedure to mount the head, using a new gasket.
Condenser Flow Sensor: The condenser sensor should be cleaned anytime the condenser is opened. This should typically be performed at the annual inspection; however, more frequent cleaning may be required depending on the conditions of the jobsite. Recommended maintenance includes the following: • Check the sensor tip for buildup. • Clean the tip using a soft cloth. Stubborn buildup, such as lime, can be removed using a common vinegar cleaning agent.
Electrical Panels: Excessive accumulation of dirt within panels can damage components, inhibit good air circulation, and make visual inspections difficult.

Water Treatment

Special care must be taken when utilizing open system water that is usually not treated (such as lakes, rivers, and ponds). The use of untreated water will result in corrosion, erosion, slime buildup, scaling, or algae formation. Water treatment service must be used. Special tube and water head material may be required to reduce damage from corrosion. Daikin Applied is not responsible for damage or faulty operation from untreated or improperly treated water. See “Water Piping” on page 17 for caution stateme

Source: MaintainX (Community Member)