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Thermo Scientific NESLAB HX 750 User Manual

Thermo Scientific NESLAB HX 750
77 pages
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Thermo Scientific NESLAB HX 750 Specifications

General IconGeneral
Cooling Capacity @ 20°C750 W
Temperature Range+5°C to +35°C
Temperature Stability±0.1°C
Pump TypeCentrifugal
Power Supply230V, 50/60Hz
Cooling Capacity750 W
RefrigerantR-404A

Summary

SECTION I Safety

Warnings

Lists general safety precautions and warnings for operating the unit.

SECTION II General Information

Cooling Capacity

Presents charts showing cooling capacity based on fluid temperature and model.

SECTION III Installation

Electrical Requirements

Details voltage, frequency, and phase requirements for unit installation.

Plumbing Requirements

Specifies plumbing connections and adapter requirements for fluid circulation.

Fluids

Recommendations and warnings regarding the use of cooling fluids and water quality.

SECTION IV Temperature Controller

Controller Keypad

Describes the function of each button on the temperature controller keypad.

Status Indicators

Explains the meaning of various status LEDs and indicators on the controller.

SYS FAULT Display

Details critical error messages and their impact on unit operation.

Changing a Value

Provides instructions on how to modify setpoints and other numerical values.

SECTION V Operation

Flow Control

Explains how to adjust the flow rate of the cooling fluid to the application.

Start Up

Step-by-step guide for starting the unit, including pre-start checks.

SECTION VII Maintenance & Service

Condenser Cleaning (Air-cooled units only)

Instructions for cleaning the condenser fins to ensure proper airflow and cooling.

Reservoir Cleaning

Procedure for cleaning the unit's fluid reservoir and reassembling the cover.

High/Low Pressure Cutouts

Describes the function of high/low pressure cutouts and how to reset them.

Section VIII Troubleshooting

Unit Not Starting or Cycling

Troubleshooting steps for units that fail to start or cycle unexpectedly.

No Fluid Circulation

Steps to diagnose and resolve issues with no fluid circulation.

Inadequate Temperature Control

Diagnosing and correcting problems with inaccurate temperature regulation.

Appendix A Water Quality Recommendations

Appendix B External Probe Calibration

Appendix D RS-232 Serial Communications Protocol

Read Functions

Lists available commands for reading unit parameters like temperature and flow.

Appendix E RS-485 Serial Communications Protocol

WARRANTY

Warranty Terms and Conditions

Details the 12-month warranty, repair responsibilities, and exclusions.

Exclusions and Limitations

Covers conditions not covered by warranty, such as misuse, neglect, or accidents.

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