Owners Guide

4
CHAPTER 1
INTRODUCTION
1-1 Introducon
1-2 This operaon and maintenance manual provides you with the necessary informaon for using and
maintaining the Mechanical and Biological Refrigerator, NSN 4110-01-629-6841. The manual includes informa-
on for operaon, prevenve maintenance, and correcve maintenance.
WARNING
WHEN THE REFRIGERANT LINE HAS BEEN OPENED, OR FOR ANY OPERATION REQUIRING OPENING THE REFRIG-
ERANT LINE, ONLY QUALIFIED MAINTENANCE PERSONNEL, USING PROCEDURES AND EQUIPMENT SPECIFIED
BY THE MANUFACTURER OR BY DEPOT-LEVEL AUTHORITIES, SHOULD WORK ON THE REFRIGERATION SYSTEM.
ANY MOISTURE THAT IS ALLOWED INTO THE REFRIGERATION LINES WILL COMBINE WITH THE FLUORINE RE-
FRIGERANT TO PRODUCE HYDROFLUORIC ACID, AN EXTREMELY POWERFUL AND CORROSIVE ACID.
1-3 All procedures in this manual refer to the electrical and mechanical elements of operaon and mainte-
nance.
1-4 Organizaon of the manual. As shown in the Table of Contents, this manual is organized as follows:
Chapter 1: INTRODUCTION. Provides informaon on organizaon of the manual, purpose of the
refrigerator, descripon and specicaons for the refrigerator, list of required equipment, and
safety informaon.
Chapter 2: OPERATION. Tells you shelf life, storage requirements, how to unpack, install, and oper
ate the refrigerator, with a brief theory of operaon.
Chapter 3: MAINTENANCE. Details the procedures for preventave and correcve maintenance of
the refrigerator.
Chapter 4: PARTS LIST. Lists, by assemblies, the replacement parts for the refrigerator, with part
numbers and illustraons.
Chapter 5: DIAGRAMS. Contains all illustraons cited in the text, but not otherwise included.
1-5 Purpose of the refrigerator. The refrigerator is to be used as a refrigerator-freezer at ward level in eld
hospitals as designated by the Department of Defense.
1-6 Descripon. Refer to Figures 1-1 and 1-2. The refrigerator is light weight and portable, designed for
eld operaons. Providing 6.1 cubic feet of refrigeraon and freezing space, the refrigerator incorporates three
shelves, drip pan, 0.7 cubic foot freezer compartment, adjustable thermostat, carrying handles, glide feet, and
corrosion resisng steel shield for mounng over rear mechanical openings. The refrigerator compartment op-
erates over a temperature range of 34 to 42 degrees Fahrenheit, and the freezer compartment operates over
a range of 12 to 20 degrees Fahrenheit. The operaon of this unit may vary from unloaded performance when
loaded with commodies in various amounts and temperatures.
The refrigerator has a 230/115 VAC step-down transformer; it can operate from either 230 or 115 VAC, 60/50
Hz source. Figure 1-2, No. 2, 3, 7.