[Code of Federal Regulations]
[Title 46, Volume 2]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR58.20-15]

[Page 264]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 58_MAIN AND AUXILIARY MACHINERY AND RELATED SYSTEMS--Table of Contents
 
                  Subpart 58.20_Refrigeration Machinery
 
Sec. 58.20-15  Installation of refrigerating machinery.

    (a) Where refrigerating machines are installed in which anhydrous 
ammonia is used as a refrigerant, such machines shall be located in a 
well-ventilated, isolated compartment, preferably on the deck, but in no 
case shall it be permissible to install such machines in the engineroom 
space unless the arrangement is such as to eliminate any hazard from gas 
escaping to the engineroom. Absorption machines using a solution of aqua 
ammonia and machines using carbon dioxide are exempt from this 
requirement, provided the maximum charges that might be released in the 
event of breakage do not exceed 300 pounds.
    (b) Machinery compartments containing equipment for ammonia shall be 
fitted with a sprinkler system providing an effective water spray and 
having a remote control device located outside the compartment.
    (c) All refrigeration compressor spaces shall be effectively 
ventilated and drained and shall be separated from the insulated spaces 
by a watertight bulkhead, unless otherwise approved.

[CGFR 68-82, 33 FR 18878, Dec. 18, 1968, as amended by USCG-2004-18884, 
69 FR 58346, Sept. 30, 2004]