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Operator must be familiar with equipment, controls, and log keeping for efficient operation.
Explains unit identifying numbers and component nameplates for inquiries and service.
Describes the system for positive protection against motor overheating using thermistors.
Explains the system that senses surge conditions and stops the compressor to prevent damage.
Explains how safety controls lock out automatically and require manual reset after faults are corrected.
Contains the control module and thermostats with adjustments accessible through the panel door.
Houses operating and safety relays, and wiring terminal strips; relays are plug-in type for easy service.
Includes pressure gauges, indicator lights, reset button, and ON/OFF switch on the front panel.
Details the solid-state module for temperature and current limit control with auxiliary features.
Explains how inlet vane movement, controlled by oil flow, positions for capacity control.
Describes adjustable needle valves controlling vane speed for system operating requirements.
Details the oil pump assembly for lubrication, heat removal, and hydraulic operation of vanes.
Explains the function of oil coolers in maintaining proper oil temperature under operating conditions.
Lists routine checks to ensure all components are ready for chiller operation.
Describes the hot gas bypass system used in PHH chillers for light cooling loads.
Covers lubrication, changing oil filters, and refrigerant cycle log maintenance.
Discusses maintaining operating condition logs and proper oil/refrigerant charge.
Details checks for compressor current draw, oil heaters, safety controls, and motor resistance.
Emphasizes preventing dirt issues through regular maintenance of filters and strainers.
Outlines procedures for annual shutdown and annual startup to prepare for seasonal operation.
Step-by-step instructions for safely pumping down the system to avoid freezing damage.
Procedures for checking the system for leaks after refrigerant loss using dry nitrogen.
Describes the process of evacuating the system to remove non-condensables using a vacuum pump.
Details the process for charging refrigerant, including precautions for clean, dry lines.
Explains the procedure for replacing faulty relief valves in condenser designs.
Procedure for setting the current limit to 100% amperes for maximum compressor motor current.
Steps to calibrate the control module's temperature setting for accurate water temperature control.
Explains how to calibrate ramp-up functions for controlled compressor loading at startup.
Details setting the pulse rate for controlling vane speed to maintain stable operation.
Describes the function of the current transformer in generating a voltage signal for motor current.
Describes adjusting needle valves to control the rate of oil bleed-off for vane positioning speed.
Lists causes and corrective actions for motor temperature issues indicated on the control panel.
Provides troubleshooting for oil pressure related faults indicated on the control panel.
Lists causes and corrective actions for oil temperature issues indicated on the control panel.
Outlines troubleshooting for low pressure faults indicated on the control panel.
Lists causes and corrective actions for discharge temperature problems.
Provides troubleshooting for discharge pressure related issues.
Explains causes and actions for the external failure light on the control panel.
Troubleshooting steps when the compressor fails to start.
Lists causes and corrective actions for load recycle issues.
Provides troubleshooting steps for surgegard related problems.
Lists causes and corrective actions when the compressor starter overload trips.
Identifies potential causes and solutions for compressor hunting issues.
Provides troubleshooting steps for when the compressor fails to load properly.
Outlines actions to take when the compressor fails to unload as expected.
Explains how to troubleshoot and reset the control circuit when it cannot be reset.
Details the benefits of McQuay's maintenance plan covering inspections and emergency service.
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