ASTM F1433-97
(Specification)Standard Specification for Mechanically Refrigerated Shipboard Air Conditioner
Standard Specification for Mechanically Refrigerated Shipboard Air Conditioner
SCOPE
1.1 This specification covers self-contained mechanically refrigerated air conditioners for shipboard use in air circulation, air cooling, and dehumidification.
1.2 These air conditioners are intended for use in compartments and areas where central system air conditioning is not provided.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1.4 The values states in SI metric units are to be regarded as standard.
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Standards Content (Sample)
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An American National Standard
Designation: F 1433 – 97
Standard Specification for
Mechanically Refrigerated Shipboard Air Conditioner
This standard is issued under the fixed designation F 1433; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 210 Standard for Unitary Air-Conditioning Equipment
2.3 American Society of Heating, Refrigerating and Air-
1.1 This specification covers self-contained mechanically
Conditioning Engineers (ASHRAE):
refrigerated air conditioners for shipboard use in air circula-
15 Safety Code for Mechanical Refrigeration
tion, air cooling, and dehumidification.
37 Methods of Testing for Rating Unitary Air-Conditioning
1.2 These air conditioners are intended for use in compart-
and Heat Pump Equipment
ments and areas where central system air conditioning is not
2.4 American Water Works Association (AWWA):
provided.
C504 Standard for Rubber-Seated Butterfly Valves
1.3 This standard does not purport to address all of the
2.5 National Electrical Manufacturers Association
safety concerns, if any, associated with its use. It is the
(NEMA):
responsibility of the user of this standard to establish appro-
MG 1 Motors and Generators
priate safety and health practices and determine the applica-
ICS 1 General Standards for Industrial Control and Systems
bility of regulatory limitations prior to use.
2.6 Underwriters Laboratories, Inc. (UL):
1.4 The values states in SI metric units are to be regarded as
465 Standard for Safety, Central Cooling, and Air Condi-
standard.
tioning
2. Referenced Documents 873 Standard for Safety Temperature-Indicating and Regu-
lating Equipment
2.1 ASTM Standards:
2.7 Federal Specification:
A 276 Specification for Stainless Steel Bars and Shapes
FF-B-171 Bearings, Ball, Annular (General Purpose)
A 569/A 569M Specification for Steel, Carbon (0.15 Maxi-
2.8 Federal Regulations:
mum Percent), Hot-Rolled Sheet and Strip Commercial
Code of Federal Regulations, Title 46
B 16 Specification for Free-Cutting Brass Rod, Bar, and
Shapes for Use in Screw Machines
3. Terminology
B 61 Specification for Steam or Valve Bronze Castings
4 3.1 Definitions:
B 75 Specification for Seamless Copper Tube
3.1.1 inspection—the process of measuring, examining,
B 148 Specification for Aluminum-Bronze Sand Castings
testing, gaging, or otherwise comparing the unit with the
B 209 Specification for Aluminum and Aluminum-Alloy
applicable requirements.
Sheet and Plate
6 3.1.2 lot—all units of the same type, service, and size
D 3951 Practice for Commercial Packaging
offered for delivery at one time.
2.2 Air-Conditioning and Refrigeration Institute (ARI):
3.2 Definitions of Terms Specific to This Standard:
This specification is under the jurisdiction of ASTM Committee F-25 on Ships
and Marine Technology and is the direct responsibility of Subcommittee F25.11 on Application for copies should be addressed to the American Society of Heating,
Machinery. Refrigerating and Air Conditioning Engineers, 1791 Tullie Circle, NE, Atlanta, GA
Current edition approved Nov. 10, 1997. Published November 1998. Originally 30329.
published as F 1433 - 94. Last previous edition F 1433 - 94. Application for copies should be addressed to the American Water Works
Annual Book of ASTM Standards, Vol 01.05. Association, 666 W. Quincy Ave., Denver, CO 80235.
3 10
Annual Book of ASTM Standards, Vol 01.03. Application for copies should be addressed to the National Electrical Manu-
Annual Book of ASTM Standards, Vol 02.01. facturers Association, 1300 N. 17th St., Suite 1847, Rosslyn, VA 22209.
5 11
Annual Book of ASTM Standards, Vol 02.02. Applications for copies should be addressed to the Underwriters Laboratories,
Annual Book of ASTM Standards, Vol 15.09. Inc., 333 Pfingsten Rd., Northbrook, IL 60062.
7 12
Application for copies should be addressed to the Air-Conditioning and Available from Standardization Documents Order Desk, Bldg. 4, Section D,
Refrigeration Institute, 1501 Wilson Blvd., Arlington, VA 22209. 700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F 1433
3.2.1 air discharge plenum—an enclosure (housing) con- in accordance with UL 465 and ARI 210. The refrigerant
taining guide vanes and a grill or louvers in the outlet opening system shall be constructed in accordance with the requirement
for directing the airflow. of ASHRAE 15. Every component, including interconnecting
3.2.2 air handling/evaporator section—an enclosed compo- wiring and piping, shall be enclosed within the cabinet, except
nent consisting of an air filter, fan with drive motor, evaporator where external mounting is permitted by this specification. The
(cooling coil), refrigerant flow control, and condensate collec- air conditioner shall be factory assembled, complete, self-
tor and drain. contained, with the refrigerant system and components dehy-
3.2.3 condensing unit—contains refrigerating components, drated and charged with the operating quantities of refrigerant
consisting of a compressor with a drive motor, condenser, and oil. The air conditioner shall be ready for operation after
receiver, operating and safety controls, and interconnecting removal of the shipping protection, opening of valves, adjust-
piping and wiring. The controls include a condenser water ment of belts, and connection to services. Valves, controls, and
regulating valve, high and low refrigerant pressure switches, equipment subject to service and repair shall be readily
refrigerant relief device, and motor overload protection. accessible for servicing through removable panels. Where
3.2.4 cooling effect—the net room sensible cooling effect of panels are provided for access to equipment, machine screws
a unit is defined as the difference between the net total cooling may be used for fastening.
effect and the dehumidifying effect, expressed in watts. The net
6.2 Refrigerant System—Every component, including pip-
total cooling effect is the total useful capacity of the unit for
ing, controls, and accessories by the refrigerant system, shall
removing heat from the space to be treated, expressed in watts.
be constructed for use with Refrigerant-22 (monochlorodifluo-
The net dehumidifying effect is the difference between the
romethane) or other specified refrigerant.
moisture content in kilograms per hour of the entering and
6.3 Materials—Materials shall be as specified herein.
leaving air, multiplied by 685, expressed in watts.
6.3.1 Dangerous Materials—Mercury and materials which
may produce dangerous gases or cause other harmful effects
4. Classification
under conditions, including fire, shall not be used. Magnesium
4.1 The air conditioners should be of the following types, and its alloys shall not be used in the manufacture of the air
services, arrangements and size as specified: conditioners or in any component parts.
Type I drip-proof protected
6.3.2 Corrosion Protection—Corrosion-resisting steel, cop-
Type II explosion-proof enclosed per, brass, bronze, chromium, copper-nickel, and copper-nickel
Service 1 440-V 60-Hz alternating current (ac)
alloys as specified herein are considered corrosion-resisting
Service 2 230-V direct current (dc) materials. Where corrosion-resisting steel is used, it shall be
Service 3 115-V dc
type 316 or 347 in accordance with Specification A 276.
Service 4 220-V 60-Hz alternating current (ac) Corrosion-resisting steel, when fabricated by any method that
Arrangement A with air discharge plenum
tends to reduce corrosion-resisting properties, shall be normal-
Arrangement B without air discharge plenum ized to restore those properties before being used in the
Size 2 minimum cooling capacity 7000 W
assembly of any unit.
Size 3 minimum cooling capacity 10 500 W
6.3.2.1 Noncorrosion-Resisting Materials—Noncorrosion-
Size 5 minimum cooling capacity 17 500 W
resisting materials are to be protected against corrosion by the
Size 7 ⁄2 minimum cooling capacity 26 000 W
use of the chemicals, electrolytic processes, plating, or paints
and enamels.
5. Ordering Information
6.3.2.2 Fastenings or Fittings—Bolts, nuts, studs, pins,
5.1 Orders for material under this specification shall include screws, and such other fastenings or fittings shall be of
corrosion-resisting material. Self-tapping screws with machine
the following:
5.1.1 Title, number, and year of issue of this specification. screw threads may be used in the cabinet assembly. Sheet metal
screws with sheet metal threads shall not be permitted.
5.1.2 Type, service, arrangement, and size of unit (see 4.1).
5.1.3 Air discharge plenum required (see 6.1 and 6.5.10). 6.3.3 Galvanic Corrosion—Direct contact of electrolyti-
5.1.4 Type of power supply for equipment and motors (see cally dissimilar materials shall be avoided to prevent galvanic
6.5.14.1 and 6.5.14.2). corrosion.
5.1.5 When drip-proof protected or explosion-proof equip-
6.4 Piping System—The construction of the piping system
ment is required (see 4.1, 6.5.14.1, and 6.5.14.2).
shall include inlet and outlet Schedule 40 copper-nickel con-
5.1.6 When certification and test reports are required (see
denser water piping of the proper diameter, extending horizon-
14.1).
tally outside of the air conditioner cabinet. Construction shall
also include the proper size and type of drain piping from the
6. Materials and Manufacture
drain connection of the air conditioner through the cabinet
down to the deck level.
6.1 General—Air conditioners covered by this specification
6.5 Air Conditioner Components:
shall consist of a condensing unit section, an air handling/
evaporator section and a motor controller. An air discharge 6.5.1 Compressor—The compressor shall be of the hermetic
plenum may be included, if specified. These air conditioners type for service 1 and service 4 air conditioners and of the open
shall be self-contained and shall perform as specified herein type for service 2 and service 3 air conditioners. Provision shall
when connected to cooling water, drainage, and electric power be made for adequate lubrication of the rubbing and wearing
F 1433
surfaces including operation under ship motion as specified in tubes shall be 19-mm outside diameter, constructed of copper-
7.3. Compressors shall be provided with a crankcase heater. nickel (90-10) UNS C70600. The tubes shall be extruded fin
Crankcase heaters shall be replaceable without having to type. Drain and vent fittings and zinc anode holders shall be
remove oil or refrigerant from the compressor and shall be nickel-copper (70-30) UNS C71500.
arranged to provide compressor oil heating before start-up and
6.5.3 Liquid Receiver—The liquid receiver shall have an
at any time the compressor is in the off cycle. Compressors
internal volume at least 25 % greater than the volume of the
shall be provided with suction and discharge compressor
complete refrigerant charge. The receiver shall contain an
service shutoff valves and means for charging.
outlet shutoff valve and pressure relief device.
6.5.1.1 Open Compressor—The open compressor shall be
6.5.4 Cooling Coil—The cooling coil (evaporator) shall be
of the positive displacement type. The shaft seal and main
of finned-tube construction and shall be composed of copper
bearings shall be replaceable in their entirety without the
tubes, in accordance with Specification B 75, or aluminum
necessity of replacing or refurbishing the crankshaft or crank-
tubes with copper fins. Fins shall be firmly bonded to the tube.
case. Compressor speeds for open compressors shall not
A drip pan and drain for collecting the condensate shall be
exceed 1800 revolutions per minute (r/min).
furnished.
6.5.1.2 Hermetic Compressor—The hermetic compressor
6.5.5 Water-Regulating Valves—A water-regulating valve
shall be of the positive displacement type.
shall be provided at the outlet to each condenser. The valve
6.5.2 Condenser—The condenser shall be seawater cooled
shall be direct-acting or pilot-controlled actuated by condenser
and constructed in accordance with the criteria shown in Table
gas pressure to modulate the flow of water required for the
1. The condenser shall be sized so that the compressor motor
condenser. The valve shall withstand seawater inlet pressures
shall not be overloaded when the air conditioner is experienc-
up to 1.37 MPa. The valve shall be constructed of nonferrous
ing overload conditions. The condenser shall be a shell and
or corrosion-resisting material. The valve shall be constructed
tube construction with water in the tubes and refrigerant in the
to prevent the entry of seawater into the refrigerant system in
shell and shall have an even number of water passes. The
the event of derangement.
condenser shall be mechanically cleanable in place with
6.5.6 Strainer—A strainer shall protect the condenser and
removable water boxes or heads to permit tubes to be exam-
water-regulating valve. The strainer shall be not less than 19
ined, cleaned or replaced as necessary. The condenser shall be
mm n.p.s. However, it shall be sized as to not restrict seawater
cleanable from either side of the cabinet. Means shall be
flow during overload conditions. The strainer shall be shipped
provided to remove entrained air from each inlet pass. Con-
loose for installation in the seawater piping during air condi-
denser heat drains shall be provided. Zinc anodes shall be
tioner installation.
installed in the condenser heads (seawater side). The condenser
6.5.7 Expansion Valve—Refrigerant flow to the cooling coil
shall have a means for purging air and noncondensable gases
(evaporator) shall be controlled by a thermostatic valve. The
and a relief valve to prevent overpressurization of the refrig-
valve shall be an adjustable superheat, externally equalized
erant side. The tube sheets shall be of copper-nickel (90-10)
type. The valve body shall be of cast or forged brass or bronze,
UNS C70600. The condenser heads shall be of valve bronze,
and the inlet and outlet connections shall be an integral part of
Specification B 61 or nickel-aluminum-bronze, Specification
the valve body.
B 148 alloy 95800, heat treated at 650°C for 1 h, to inhibit
6.5.8 Piping—Any piping necessary for the operation of the
de-aluminization as prescribed in AWWA standard C504. The
equipment shall be provided up to and including fittings at each
unit required for interconnection to supplementary service.
TABLE 1 Air Conditioner Rating Conditions
Exterior connection fit
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