What causes a McQuay ACZ 028A Heat Pump compressor thermal switch to open?
A McQuay Heat Pump compressor thermal switch might open if it is operating beyond design conditions. To resolve this, add facilities so conditions are within allowable limits.
Guidelines for sizing and routing suction lines, including noise considerations.
Assuring proper liquid refrigerant flow to the expansion valve.
Step-by-step instructions for unit start-up and shutdown.
Describes the typical operational sequence of the unit.
Details the sequence of events during a unit shutdown.
Covers compliance with codes and wire requirements for field connections.
Details electrical data and wiring for single-point power connections.
Lists rated and locked rotor amp draw for compressors and fans.
Provides field wiring data for single-point power connections.
Illustrates the typical electrical connections for field wiring.
How to interpret the sightglass for refrigerant charge and moisture.
Details the solid-state motor protection for compressors.
Explains the fan control method for maintaining head pressure.
Lists various configurable setpoints with default and range values.
Defines equipment protection alarms, conditions, and actions.
Details shutdown and limit alarms, their causes, actions, and reset.
Procedure for low ambient start sequence and automatic limit adjustments.
Explains how to navigate through the controller's menu matrix.
Detailed steps for modifying setpoint values using the keypad.
Visual representation of the controller's menu hierarchy.
Explains how active and logged alarms are displayed and cleared.
Guides on how to change setpoint values for various parameters.
Configuring minimum run and stop times for compressors.
A comprehensive chart listing common problems and their solutions.
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General