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General| Brand | Dunham-Bush |
|---|---|
| Model | WCFX 20 |
| Category | Chiller |
| Language | English |
Procedure for scheduling and preparing for unit start-up.
Function and requirement of safety relief valves.
Measures to prevent damage from freezing water in the unit.
Draining procedures for units in cold standby conditions.
Freeze protection during normal operation.
Freeze prevention during refrigerant transfer and maintenance.
Overview of the Vision 2020i controller, keypad, and functions.
Technician access, calibration of FLA/sensors, and manual control.
Detailed explanation of various safety and operational control functions.
Procedure to calibrate compressor capacity based on FLA and load percentage.
Sequencing multiple chillers for building load demand.
Configuring hardware settings for network addressing.
Setting DIP switches for controller DBLAN addresses.
Setting terminal addresses for communication with controllers.
Detecting fouling and cleaning evaporator/condenser tubes.
Troubleshooting electrical issues like relay trips and overloads.
Procedures for refrigerant and oil charging.
Common symptoms, possible causes, and remedies for unit issues.
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