ASTM F1433-97(2004)
(Specification)Standard Specification for Mechanically Refrigerated Shipboard Air Conditioner
Standard Specification for Mechanically Refrigerated Shipboard Air Conditioner
ABSTRACT
This specification covers self-contained mechanically refrigerated air conditioners for shipboard use in air circulation, air cooling, and dehumidification. These air conditioners are intended for use in compartments and areas where central system air conditioning is not provided. The air conditioners should be of the following types, and arrangements as specified: type I - drip-proof protected, and type II - explosion-proof enclosed; arrangement A - with air discharge plenum, and arrangement B - without air discharge plenum. The operation, air-circulating equipment, ship inclination, capacity, overload, and condensation of the air conditioner shall meet the requirements prescribed. The inspection requirements specified in this specification are classified as follows: first article inspection; quality conformance inspection; visual examination; first article test procedures; and operating test.
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 The values stated in SI metric units are to be regarded as standard.
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.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information.
An American National Standard
Designation: F1433 – 97 (Reapproved 2004)
Standard Specification for
Mechanically Refrigerated Shipboard Air Conditioner
This standard is issued under the fixed designation F1433; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2.3 American Society of Heating, Refrigerating and Air-
Conditioning Engineers (ASHRAE):
1.1 This specification covers self-contained mechanically
15 Safety Code for Mechanical Refrigeration
refrigerated air conditioners for shipboard use in air circula-
37 Methods of Testing for Rating UnitaryAir-Conditioning
tion, air cooling, and dehumidification.
and Heat Pump Equipment
1.2 These air conditioners are intended for use in compart-
2.4 American Water Works Association (AWWA):
ments and areas where central system air conditioning is not
C504 Standard for Rubber-Seated Butterfly Valves
provided.
2.5 National Electrical Manufacturers Association
1.3 ThevaluesstatedinSImetricunitsaretoberegardedas
(NEMA):
standard.
MG 1 Motors and Generators
1.4 This standard does not purport to address all of the
ICS 1 General Standards for Industrial Control and Systems
safety concerns, if any, associated with its use. It is the
2.6 Underwriters Laboratories, Inc. (UL):
responsibility of the user of this standard to establish appro-
465 Standard for Safety, Central Cooling, and Air Condi-
priate safety and health practices and determine the applica-
tioning
bility of regulatory limitations prior to use.
873 Standard for Safety Temperature-Indicating and Regu-
2. Referenced Documents lating Equipment
2.7 Federal Specification:
2.1 ASTM Standards:
FF-B-171 Bearings, Ball, Annular (General Purpose)
A276 Specification for Stainless Steel Bars and Shapes
2.8 Federal Regulations:
A569/A569M Specification for Steel, Carbon (0.15 Maxi-
Code of Federal Regulations, Title 46
mum, Percent), Hot-Rolled Sheet and Strip Commercial
B16/B16M Specification for Free-Cutting Brass Rod, Bar
3. Terminology
and Shapes for Use in Screw Machines
3.1 Definitions:
B61 Specification for Steam or Valve Bronze Castings
3.1.1 inspection—the process of measuring, examining,
B75 Specification for Seamless Copper Tube
testing, gaging, or otherwise comparing the unit with the
B148 Specification for Aluminum-Bronze Sand Castings
applicable requirements.
B209 Specification for Aluminum and Aluminum-Alloy
3.1.2 lot—all units of the same type, service, and size
Sheet and Plate
offered for delivery at one time.
D3951 Practice for Commercial Packaging
3.2 Definitions of Terms Specific to This Standard:
2.2 Air-Conditioning and Refrigeration Institute (ARI):
3.2.1 air discharge plenum—an enclosure (housing) con-
210 Standard for Unitary Air-Conditioning Equipment
taining guide vanes and a grill or louvers in the outlet opening
for directing the airflow.
This specification is under the jurisdiction of ASTM Committee F25 on Ships
and Marine Technology and is the direct responsibility of Subcommittee F25.11 on
Machinery and Piping Systems. Available from American Society of Heating, Refrigerating, and Air-
Current edition approved May 1, 2004. Published May 2004. Originally Conditioning Engineers, Inc. (ASHRAE), 1791 Tullie Circle, NE, Atlanta, GA
approved in 1994. Last previous edition approved in 1997 as F1433 - 97. DOI: 30329.
10.1520/F1433-97R04. Available fromAmerican Water WorksAssociation (AWWA), 1401 New York
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Ave., NW, Suite 640, Washington, DC 20005.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from National Electrical Manufacturers Association (NEMA), 1300
Standards volume information, refer to the standard’s Document Summary page on N. 17th St., Suite 1847, Rosslyn, VA 22209.
the ASTM website. AvailablefromUnderwritersLaboratories,Inc.,333PfingstenRd.,Northbrook,
Withdrawn. IL 60062.
4 9
Available from Air-Conditioning and Refrigeration Institute, 1501 Wilson Available from Standardization Documents Order Desk, Bldg. 4, Section D,
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.
F1433 – 97 (2004)
3.2.2 air handling/evaporator section—an enclosed compo- interconnecting wiring and piping, shall be enclosed within the
nent consisting of an air filter, fan with drive motor, evaporator cabinet, except where external mounting is permitted by this
(cooling coil), refrigerant flow control, and condensate collec- specification. The air conditioner shall be factory assembled,
tor and drain. complete, self-contained, with the refrigerant system and
3.2.3 condensing unit—contains refrigerating components, components dehydrated and charged with the operating quan-
consisting of a compressor with a drive motor, condenser, tities of refrigerant and oil. The air conditioner shall be ready
receiver, operating and safety controls, and interconnecting for operation after removal of the shipping protection, opening
piping and wiring. The controls include a condenser water of valves, adjustment of belts, and connection to services.
regulating valve, high and low refrigerant pressure switches, Valves, controls, and equipment subject to service and repair
refrigerant relief device, and motor overload protection. shall be readily accessible for servicing through removable
3.2.4 cooling effect—the net room sensible cooling effect of panels. Where panels are provided for access to equipment,
a unit is defined as the difference between the net total cooling machine screws may be used for fastening.
effectandthedehumidifyingeffect,expressedinwatts.Thenet
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 in this speci-
leaving air, multiplied by 685, expressed in watts.
fication.
6.3.1 Dangerous Materials—Mercury and materials which
4. Classification
may produce dangerous gases or cause other harmful effects
4.1 The air conditioners should be of the following types, under conditions, including fire, shall not be used. Magnesium
services, arrangements, and size as specified: and its alloys shall not be used in the manufacture of the air
Type I drip-proof protected conditioners or in any component parts.
Type II explosion-proof enclosed
6.3.2 Corrosion Protection—Corrosion-resisting steel, cop-
Service 1 440-V 60-Hz alternating current (ac) per,brass,bronze,chromium,copper-nickel,andcopper-nickel
Service 2 230-V direct current (dc)
alloys as specified in this specification are considered
Service 3 115-V dc corrosion-resistingmaterials.Wherecorrosion-resistingsteelis
Service 4 220-V 60-Hz alternating current (ac)
used, it shall be type 316 or 347 in accordance with Specifi-
Arrangement A with air discharge plenum cationA276. Corrosion-resisting steel, when fabricated by any
Arrangement B without air discharge plenum
method that tends to reduce corrosion-resisting properties,
Size 2 minimum cooling capacity 7000 W shall be normalized to restore those properties before being
Size 3 minimum cooling capacity 10 500 W
used in the assembly of any unit.
Size 5 minimum cooling capacity 17 500 W
6.3.2.1 Noncorrosion-Resisting Materials—Noncorrosion-
Size 7 ⁄2 minimum cooling capacity 26 000 W
resisting materials are to be protected against corrosion by the
use of the chemicals, electrolytic processes, plating, or paints
5. Ordering Information
and enamels.
6.3.2.2 Fastenings or Fittings—Bolts, nuts, studs, pins,
5.1 Orders for material under this specification shall include
the following: screws, and such other fastenings or fittings shall be of
corrosion-resisting material. Self-tapping screws with machine
5.1.1 Title, number, and year of issue of this specification.
5.1.2 Type, service, arrangement, and size of unit (see 4.1). screwthreadsmaybeusedinthecabinetassembly.Sheetmetal
screws with sheet metal threads shall not be permitted.
5.1.3 Air discharge plenum required (see 6.1 and 6.5.10).
5.1.4 Type of power supply for equipment and motors (see
6.3.3 Galvanic Corrosion—Direct contact of electrolyti-
6.5.14.1 and 6.5.14.2). cally dissimilar materials shall be avoided to prevent galvanic
5.1.5 When drip-proof protected or explosion-proof equip- corrosion.
ment is required (see 4.1, 6.5.14.1, and 6.5.14.2).
6.4 Piping System—The construction of the piping system
5.1.6 When certification and test reports are required (see
shall include inlet and outlet Schedule 40 copper-nickel con-
14.1).
denser water piping of the proper diameter, extending horizon-
tally outside of the air conditioner cabinet. Construction shall
6. Materials and Manufacture
also include the proper size and type of drain piping from the
drain connection of the air conditioner through the cabinet
6.1 General—Air conditioners covered by this specification
down to the deck level.
shall consist of a condensing unit section, an air handling/
6.5 Air Conditioner Components:
evaporator section, and a motor controller. An air discharge
plenum may be included, if specified. These air conditioners 6.5.1 Compressor—Thecompressorshallbeofthehermetic
shall be self-contained and shall perform as specified in this typeforservice1andservice4airconditionersandoftheopen
specification when connected to cooling water, drainage, and typeforservice2andservice3airconditioners.Provisionshall
electric power in accordance with UL 465 and ARI 210. The be made for adequate lubrication of the rubbing and wearing
refrigerant system shall be constructed in accordance with the surfaces, including operation under ship motion, as specified in
requirement of ASHRAE 15. Every component, including 7.3. Compressors shall be provided with a crankcase heater.
F1433 – 97 (2004)
Crankcase heaters shall be replaceable without having to truded fin type. Drain and vent fittings and zinc anode holders
remove oil or refrigerant from the compressor and shall be 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 B75, 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
removable water boxes or heads to permit tubes to be exam- 6.5.6 Strainer—A strainer shall protect the condenser and
ined, cleaned, or replaced as necessary. The condenser shall be
water-regulating valve. The strainer shall be not less than 19
cleanable from either side of the cabinet. Means shall be mm n.p.s. However, it shall be sized as to not restrict seawater
provided to remove entrained air from each inlet pass. Con-
flow during overload conditions. The strainer shall be shipped
denser heat drains shall be provided. Zinc anodes shall be loose for installation in the seawater piping during air condi-
installedinthecondenserheads(seawaterside).Thecondenser
tioner installation.
shall have a means for purging air and noncondensable gases
6.5.7 Expansion Valve—Refrigerant flow to the cooling coil
and a relief valve to prevent overpressurization of the refrig-
(evaporator) shall be controlled by a thermostatic valve. The
erant side. The tube sheets shall be of copper-nickel (90-10)
valve shall be an adjustable superheat, externally equalized
UNS C70600. The condenser heads shall be of valve bronze,
type.The valve body shall be of cast or forged brass or bronze,
Specification B61, or nickel-aluminum-bronze, Specification
and the inlet and outlet connections shall be an integral part of
B148, alloy 95800, heat treated at 650°C for 1 h, to inhibit
the valve body.
de-aluminization in accordance with AWWA standard C504.
6.5.8 Piping—Any piping necessary for the operation of the
The tubes shall be 19-mm outside diameter, constructed of
equipmentshallbeprovideduptoandincludingfittingsateach
copper-nickel (90-10) UNS C70600. The tubes shall be ex-
unit required for interconnection to supplementary service.
Exterior connection fittings shall be capped or plugged to
TABLE 1 Air Conditioner Rating Conditions
safeguard against damage before installati
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