Thermo Scientific 956 User Manual

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Forma Model 900 Series
-86C ULT Upright Freezer
Operating and Maintenance Manual 7090902 Rev. 17
User Manual

Thermo Scientific 956 Specifications

General

Capacity	5.6 cu. ft. (158.6L)
Defrost Method	Manual
Voltage	115V
Defrost Type	Manual
Power	115V, 60Hz

Summary

Section 1 Installation and Start-up

Control Panel Overview

Describes freezer control panel keys, displays, and indicator functions for operation.

Freezer Installation and Placement

Setting Temperature and Alarms

Guides on setting operating temperature and high/low temperature alarms.

Section 3 Alarms

Alarm Indicators and Ringback Times

Lists alarm types, delays, ringbacks, and relay status.

Specific Alarm Faults Explained

Section 5 Factory Installed Options

Back Up System (BUS) Introduction

Explains the purpose and operation of the BUS.

BUS Installation and Configuration

BUS Control Panel and Operation

Section 6 Specifications

Unit Specifications by Model

Provides detailed specs for single and double door units.

Section 8 Refrigeration Schematics

Cascade Refrigeration System Diagram

Illustrates the high and low temp stages of the refrigeration system.

Section 9 Electrical Schematics

Main Electrical Wiring Diagram

Shows the overall electrical layout and component connections.

Appendix A Handling Liquid Nitrogen

Safe Handling of Liquid Nitrogen

Covers general safety, careful handling, and protective clothing.

Nitrogen Storage and Transfer Safety

Details container use, transfer methods, and storage precautions.

Nitrogen Gas Hazards and Disposal

Warns about suffocation risk and provides disposal guidelines.

Appendix B Handling Liquid CO2

CO2 Storage and Ventilation Safety