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Thermo NESLAB HX 150 User Manual

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Refrigeration
Service
Thermo Manual P/N U00058
Rev. 09/09/97
NESLAB HX 150
Recirculating Chiller
No part of this publication may be
reproduced or reprinted except for
personal use without the prior permission
of Thermo Electron.
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Thermo NESLAB HX 150 Specifications

General IconGeneral
Temperature Stability±0.1 °C
Power Supply230V, 50/60Hz
Pump TypeCentrifugal
Cooling Capacity1500 W at 20°C
RefrigerantR-404A

Summary

Refrigeration System Specifications and References

Refrigeration Specifications

Details on refrigeration system parameters, performance, and charts.

R22 Pressure-Temperature Chart

Reference chart correlating R22 refrigerant pressure and temperature.

Heat Load Calculation

Method for calculating the heat load of the system.

Condenser Requirements

Specifications for air and water-cooled condensers.

15-pin Accessory Connector

Information on the optional 15-pin accessory connector pinout.

Parts List

List of parts for HX-100 and HX-150 models.

Safety Precautions and Operating Theory

General Cautionary Information

Essential safety warnings for handling refrigeration systems.

Chiller Operating Theory

Explanation of the chiller's operational modes (COOL and HEAT/IDLE).

Troubleshooting Guide

Troubleshooting Runaway Cold

Flowchart for diagnosing and resolving runaway cold issues.

Troubleshooting Runaway Hot

Flowchart for diagnosing and resolving runaway hot issues.

Troubleshooting Weak Cooling

Flowchart for diagnosing and resolving weak cooling problems.

Troubleshooting Refrigeration Pressures

Flowchart for diagnosing issues related to refrigeration pressures.

Component Replacement Procedures

Compressor Replacement Procedure

Detailed steps for replacing the compressor unit.

Fan Motor Replacement Procedure

Guide for safely replacing the fan motor.

Filter/Dryer Replacement Procedure

Steps for replacing the system's filter/dryer.

Solenoid Valve Replacement Procedure

Instructions for replacing the solenoid valve assembly.

Tank Coil Assembly Replacement

Procedure for replacing the Tank Coil Assembly (TCA).

Water Regulating Valve Replacement

Steps for replacing the water regulating valve.

Capillary Tube Replacement

Guide for replacing the capillary tube.

General Refrigeration Component Replacement

Overarching guidelines for replacing various refrigeration parts.

Maintenance, Testing, and Settings

Speed Check and Pressure Tests

Procedures for performing speed checks and reading pressures.

Condenser Maintenance and Flushing

Instructions for cleaning and flushing air and water-cooled condensers.

Hot Gas Valve Operation and Setting

Explanation of the hot gas valve's function and adjustment.

Schrader Valves and Leak Detection

Information on Schrader valves, leak testing, and repair.

Solenoid Valve Coil Test and Rebuild

Procedures for testing the solenoid coil and rebuilding the valve.

Tank Coil Assembly Failure and Repair

How to identify and repair problems with the TCA.

Water Regulating Valve Setting

Correct procedure for setting the water regulating valve.

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