1、Comments, suggestions, or questions on this document should be addressed to WR-ALC/LGEC, 480 Richard Way Blvd. Suite 200, Robins AFB, GA 31098-1640 or emailed to bob.yoherobins.af.mil . Since contact information can change, you may want to verify the currency of this address information using the AS
2、SIST Online database at www.dodssp.daps.mil. AMSC N/A FSC 4120 DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. A-A-59501 02 July 2004 COMMERCIAL ITEM DESCRIPTION AIR CONDITIONING UNIT, ELECTRIC DRIVEN, TRAILER MOUNTED The General Services Administration has authoriz
3、ed the use of this commercial item description by all federal agencies. 1. SCOPE. This commercial item description (CID) covers a wheel-mounted, electric motor driven single-pass air conditioning unit of not less than 110 tons nominal cooling capacity (EAC110). 2. PRECEDENCE. 2.1 Precedence. The EAC
4、110 shall comply with the requirements of this document and shall comply with the applicable requirements of ASHRAE Standard 52.2; Federal Acquisition Regulations; FED-STD 595; NFPA 70 (Class 1, Division II, Group D hazardous area); OSHA; SAE AIR 1375, SAE ARP1247, SAE ARP1801, SAE ARP5374, SAE AS80
5、90, (Type II, Group C), SAE AS38386, SAE J447, and SAE J551 in effect at the time of manufacture, unless otherwise stated. Unless otherwise stated, this document has precedence over a referenced document. Where referenced documents may conflict in characteristic or performance, the more stringent re
6、quirement shall establish the minimum. 3. SALIENT CHARACTERISTICS. 3.1 Description. The EAC110 shall selectively operate as an air conditioning unit, a ventilation unit, or a heating unit. The EAC110 shall consist of electric motor driven; vapor cycle air conditioning system, air delivery and distri
7、bution system, and the necessary controls, wiring, piping, instrumentation, and housing with wheel-mounted fully suspended undercarriage, as specified herein. The EAC110 shall deliver not less than 600 pounds per minute (ppm) of conditioned air to military aircraft through three 12-inch diameter fle
8、xible supply air ducts. The EAC110 shall be designed; to operate in any mode continuously, to require not less than 200 hours between service maintenance, to operate not less than 2000 hours per year, and for a service life of 20 years. Major component rebuilds shall not be required more frequently
9、than every 10,000 hours operation. INCH-POUND Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59501 23.1.1 Performance. The EAC110 shall be capable of storage, and operation under the following environmental conditions: a. Storage temperature ran
10、ge from -60F to +165F. b. Operating temperatures range from 0F to +125F. c. Exposure to relative humidity up to 100 percent. d. Exposure to salt fog consistent with a seaside environment. e. Exposure to blowing sand and dust particles as encountered in desert areas. 3.1.1.1 Cooling. The EAC110 shall
11、 deliver not less than 1,320,000 British Thermal Units (BTU)s of cooling, as measured by air enthalpy method of SAE ARP5374, at entering ambient air conditions of 97F dry-bulb and 85F wet-bulb. Cooling mode shall operate between ambient conditions of +40F and +125F. Leaving air conditions in cooling
12、 mode shall be manually resettable down to +50F. System controls shall maintain discharge temperature setting automatically, up to total system cooling capacity. Exceeding system capacity shall only cause a loss of set-point control and shall not disengage the function. 3.1.1.2 Heating. The EAC110 s
13、hall deliver not less than 750,000 BTUs of reverse cycle cooling at entering ambient conditions of 47F. Cooling mode shall operate between ambient conditions of +20F and +70F. Leaving air temperature shall be manually resettable up to 80F. System controls shall maintain discharge temperature setting
14、 automatically, up to total system heating capacity. Exceeding system capacity shall only cause a loss of set-point control, and shall not disengage the function. 3.2 Standard commercial product. The EAC110 shall, as a minimum, be in accordance with the requirements of this CID and shall be the manu
15、facturers standard commercial product. Additional or better features, not specifically prohibited by this CID, but which are a part of the manufacturers standard commercial product, shall be included in the air conditioner furnished. 3.3 Interchangeability. All delivered EAC110 units shall be identi
16、cal to the extent necessary to ensure interchangeability of component parts. 3.4 Electric power requirements. The EAC110 shall operate on 480 V, 3 phase, 60 Hz power. A 100-foot flexible insulated power cable (three conductor with ground) shall be provided with the EAC110. The cable shall be attache
17、d to a power distribution box within the EAC110, shall store within the housing, and shall be unterminated at the free end. All power from the distribution box shall be circuit protected from overload. Electric motors shall be time delay over-current protected. Electric motor starting shall be acros
18、s the line for motors of 20 h.p. or less, and reduced voltage for motors exceeding 20 h.p. Power shall be transformed to reduced voltage for operation of all systems controls and instruments. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59501
19、33.5 Reversible vapor-cycle system. The EAC110 vapor-cycle system shall operate on a single phase refrigerant that is neither a Class I or Class II Ozone Depleting Substance/Compound (ODS/ODC). The EAC110 reversible vapor-cycle system shall include compressor(s), condenser and evaporator coil(s), am
20、bient air fan(s), expansion valve(s) and operational controls. The compressor manufacturer shall coordinate on the system configuration and the engagement method. The compressor shall not be a piston type design. Motor driven components shall be vibration isolated from the housing and connected syst
21、ems. Controls shall maintain discharge air quality below saturation and shall maintain temperature within 3 F from the set-point, while operating within total system design capacity. Coil defrost shall be automatically controlled. Controls shall isolate at least 95% of the system refrigerant during
22、normal shut-down sequence. Should the vapor-cycle system be shutdown by a safety device or emergency action, upon re-establishment of power, the controls shall start and complete a normal shut-down sequence prior to re-starting vapor-cycle operation in accordance with controls settings. Safety featu
23、res shall shut down the system, if any set-point limit for temperatures, fluid levels, flows, or pressures are exceeded. 3.6 Air delivery and distribution system. The air delivery system design point shall be 600 ppm at an external static pressure of not less than 40 inches water column. Total air d
24、elivery volume shall be adjustable between 300 and 700 ppm. Air shall be routed through three 12-inch discharge outlets with individual duct volume controls. Discharge outlets shall include mating connections for attachment of 12-inch female air duct hose connectors in accordance with SAE AS38386/2.
25、 Discharge outlets shall have female style lock-on metal caps, retained to the housing with chains or cables. Volume controls shall include a lockable fine adjustment feature. Total flow and individual duct flow shall be adjustable and monitored from the control panel. The air intake shall incorpora
26、te a serviceable filter media certified to meet ASHRAE Standard 52.2, with a Minimum Efficiency Reporting Value of 13, or a dust spot efficiency of 80 percent. The filter shall be serviceable through either an access door or through the intake air grille. A gauge on the control panel (see 3.8.1) sha
27、ll show filter restriction and shall identify the service requirement point. 3.6.1 Air delivery ducts and adapters. The EAC110 shall be equipped with six (6) twelve inch diameter by 25 foot insulated flexible duct assemblies in accordance with SAE AS38386. Each duct assembly shall include one 12-inc
28、h diameter male and one 12-inch diameter female connection in accordance with SAE AS 38386. The EAC110 shall be equipped with three reducing duct adapters, having one 12-inch diameter female end connector in accordance SAE AS38386/2 and one 8-inch diameter male end in accordance with MS33562. 3.7 Ho
29、using. A housing shall enclose the vapor cycle system, and the air delivery and distribution system. The housing shall provide a weather-resistant enclosure for all components. Hinged doors shall provide protection for the air intake(s), air discharge(s), ambient air coil(s), ambient air fan(s), and
30、 the control panel. Hinged doors or hinged access panels shall be provide for operational inspection and servicing. All major components shall be replaceable through either the service access doors or through removable panels specifically provided for the purpose. Provided by IHSNot for ResaleNo rep
31、roduction or networking permitted without license from IHS-,-,-A-A-59501 4All air openings shall be protected from bird and plant matter infiltration by a rigid mesh. Condenser coil intake air shall be protected from dust and dirt particle build-up. Conditioned air intake(s) shall not pull design co
32、nditions rainfall into the air delivery system. Conditioned air discharge connections shall have removable caps, secured by a cable or chain. 3.7.1 Duct storage compartment. The housing shall include weather-resistant compartment(s) for the storage of six 12-inch diameter duct assemblies and three d
33、uct adapters (see 3.6.1). All ducts and adapters shall be accessible while standing on the ground without the use of a reach-extending device. 3.8 Piping and instrumentation. All systems piping materials and controls components shall be selected for the applications and pressures consistent with app
34、licable law, published commercial guidelines, and safety factors. All piping shall be secured to structure to prevent chaffing and vibration during any mode of operation or mobility. Switches, controls, and gauges specified in 3.8.1 shall be of a type recommended by the manufacturer for the applicat
35、ion. 3.8.1 Operators control panel. An operators control panel shall be located on the side of the EAC110. The control panel shall be fully illuminated for night servicing operations. All components on the panel shall be weather proof. The panel shall contain as a minimum the following components: a
36、. Switch, mode selector (cooling-ventilation-heating) b. Gauge, ambient air filter restriction (see 3.6) c. Gauge, discharge air temperature d. Gauge, discharge air pressure e. Gauges, total air-flow rate and (3) individual discharge outlet air flow rates f. Controller, total discharge air-flow g. C
37、ontroller, (3) individual discharge duct air-flow h. Controller, cooling mode discharge temperature i. Controller, heating mode discharge temperature 3.9 Undercarriage. The EAC110 undercarriage shall be separately mounted to or integral with the housing (see 3.7). The undercarriage shall be of a two
38、 or three axle design, including; hinged towbar with lunette-coupler; suspended axles; defense department standardized wheels fitted with transport type pneumatic tires; inertia brakes; manually applied parking brakes; and lighting in accordance with the defined Group and Type performance requiremen
39、ts of SAE AS8090. 3.10 Lifting and tiedown attachments. The EAC110 shall be equipped with lifting/tiedown rings. The rings shall be located such that, four equal length cables to a single hook can hoist the EAC110 without more than a 10 degrees tilt from horizontal in any plane. Spreader bars shall
40、not be required and cables shall not be deflected by the housing structure. Clearance shall be provided for tiedown chains or straps. A lifting and tiedown instruction plate (see 3.13) shall be attached to the EAC110. Provided by IHSNot for ResaleNo reproduction or networking permitted without licen
41、se from IHS-,-,-A-A-59501 53.11 Sound and electromagnetic interference. 3.11.1 Operational sound levels. The maximum A-weighted sound level produced by the EAC110 shall not exceed 84 dBA, when measured in accordance with SAE ARP1801(less any requirement for internal combustion engine operation). 3.1
42、1.2 Electromagnetic interference (EMI). The EAC110 shall comply with all applicable requirements of SAE J551-1 for electromagnetic radiation and susceptibility. Susceptibility testing shall be in accordance with the requirements of SAE J551-11. Test severity levels shall be as referenced, except all
43、 Class C functions shall fall within Region I. 3.12 Cleaning, treatment, and painting. Unless otherwise specified, the EAC110 outer surfaces and the interior surface of hinged doors and access panels shall be painted forest green, color number 24052 of FED-STD-595, with polyurethane paint. The under
44、carriage may be painted black. The motors and other major components may remain the manufacturers original colors. 3.13 Identification and instruction nameplates. Identification and operating instruction shall be inscribed on aluminum nameplates. Inscriptions shall tolerate exposure to oil, dirt, su
45、nlight, and detergent solutions without fading of becoming illegible. Nameplates shall be mechanically attached (no adhesives). Chained on metal tags or decals shall not be used. EAC110 nameplates shall be as follows. 3.13.1 Identification. Functional system components, valves, gauges, and switches
46、shall be marked for identification. An end item identification plate shall be mounted on the exterior of the EAC110, with the following information inscribed. The serial number and date of delivery shall be stamped. Make and Model National Stock Number Contract Number Serial Number Date of Delivery
47、3.13.2 Control markings. All controls, valves, gauges, switches, and indicators used in the operation of the systems shall be identified. 3.13.3 Diagrams. Schematic diagrams of the piping and electrical systems shall be provided. Each control, valve, gauge, and switch identified on the diagrams shal
48、l correspond to the markings on like parts of the systems. 3.13.4 Operating instructions. Operating and precautionary instructions shall be permanently affixed near the appropriate system control panel. Instructions shall be clear, concise, and enable safe operation of the EAC110 without damage to t
49、he equipment or injury to personnel.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59501 6Each control, valve, gauge, and switch identified on the operating instructions shall correspond to the markings on like parts of the systems. 3.13.5 Lubrication plate. A lubrication plate shall show a location for all lubrication points. The plate shall identify ty
