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General| Brand | Dunham-Bush |
|---|---|
| Model | WCFX 12 |
| Category | Chiller |
| Language | English |
Guidelines for connecting evaporator and condenser water piping, including support and venting.
Precautions for connecting power wiring, adhering to codes and voltage requirements.
Procedure for scheduling an authorized representative for initial unit start-up.
Steps for safely shutting down the unit for prolonged periods, including draining and oil sampling.
Procedures for starting the unit after a prolonged shutdown, including checks and energizing heaters.
Description of oil lubrication and return systems for compressors in different models.
Explanation of the system that controls compressor capacity using hydraulic valves.
Critical measures to prevent damage from freezing water in evaporator or condenser tubes.
Procedures for draining and drying the unit when ambient temps are below freezing.
Importance of protective devices to prevent freezing during operation.
Precautions to prevent freezing when transferring refrigerant.
Configuration and operation of the DBLAN network for multi-chiller control.
Overview of the user interface, display, and connectivity of the Vision 2020i system.
Procedure for gaining authorization levels to access and modify settings.
Entry point for password login to access different authorization levels.
Access to technician-level settings for calibration, manual control, and compressor adjustments.
Entry point for technician-level access to calibration and control functions.
Main menu for technician settings including FLA calibration and sensor calibration.
Procedure for calibrating compressor Full Load Amps (FLA) and capacity percentage.
Explains various control functions managed by the Vision 2020i controller.
Shuts down the unit if leaving chilled water temperature drops below the freeze setpoint.
Procedure to calibrate compressor FLA and capacity percentages for accurate readings.
How multiple chillers are sequenced and controlled based on building load demand.
Explains the DBLAN network's role in inter-chiller communication and operation sequencing.
Step-by-step description of how chillers sequence their operation based on load demand and enable signals.
How chillers are connected and programmed within a local DBLAN network for sequencing.
Visual representation of how controllers and terminals are interconnected in the DBLAN network.
Procedures for charging refrigerant and oil, and identifying potential leaks.
How to check and add refrigerant charge using sight glasses and charging valves.
Proper oil types and maintenance for compressors, warning against adding incorrect oil.
A guide to diagnosing and resolving common unit symptoms and potential causes.
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