1、MILD-1521 5A (SaIpS) MILD- 1521 5(SHJZJS) 1 Septe.mber 1350 MUTA RY SPECPICA TION DEHUMIDIFIERS, DESICCANT, ELECTRIC (FOR SHIPBOARD USE) : . 1. SCOPE 1.1 Scope. - This specification covers electric desiccant dehumidifiers for we on inactive Kavzl ships. 1.2 Classification. - Dehumidifiers shall be o
2、f the following types, classes and sizes as s+rfied (see 6.2): Type I - Dual bed. Type II - Single bed. Size - 55- 505. Size - 20 - 153. Class 1 - Package. Class 2 - Vehicle. 2. APPLICABLE DOCUMENTS 2.1 The follovzing specifications Metallic, Flekble, Interlocking RR-S-141 - Screening, Wire, Insect.
3、 MILITARY JAN-P-735 - Primer, Paint, Zinc-Chromate, Alkyd Type. MIL-C-915 - Cable, Cord and Wire, Electrical (Shipboard Use). MIL-D-963 - Drawings, Production, Procedure for Procurement of. MIL-62212 - Controllers, Mdor Starters, and Master Switches- Alternating Current; Naval Shipboard Use. MIL-1-2
4、819 - Insulation, Thermal, .Block. hiLD-3716 - Dessicants (Activated) for Dynamic Dehumidification. MIL-P-8585 - Primer Coating, Zinc Chromate, Lpw- Moisture-Sensitivity. MIL-P-15024 - Plates, Identification-Information and Marking for MILM-15071 - Manual, Technical, for Mechanical and Electrical Eq
5、uipment (Less Electronics). . NIIL-E-15090 - Enamel Equipment, Light Gray (Formula NO. 111). - MILP-15137 - Provisioning and Technical Documentation for Repafr Parts for Electrical and Mechanical Equipment (Naval Shipboard Use). Identification of Electrical, Electronic and Mechanical Equipment. . .
6、. L/ . _._._-._ _ -_.-.*- _ . I . % - ._ -. . . . - _ . . -. . - . *.- . .- ,_._.-_ . ._._ ._. ._._-_ . - .- _._ . _- . -. _._ - )_.L_I_ _c_.I- _ ._ . .-.- * -_ . ._ * _ . .- . - -_ ._-.-I._I. . _ _-.-_-.I_ .- . -_._ -.- -.-. _-_I-_ ._- -_.*, _._-.- . . _- _I-I_._ . _. _ _ _._.-. - . . .-,. . * . .
7、. . . I . . . _. - _ . .- . . . ._._. . _ _. ._. . . _ . CI_-_._._. . .- I_I - e . “_ .-. “ _ - -.-., - . . _._._ ._. _. . . . . . . . .,. . _. . . . . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_ . . - . ._ MIL- D-15215A (SHIPS) MILITARY (contd
8、. ) MIL-C-15328 - Coating, Pretreatment (Formula No. 117 for Metals). MIL-M-17059 - Motors, Alternating-Current, Fractional hT (shipboard Use). MiL-M-17060 - Motors, Alternating Current, Integral HP, (Shipboard Use). MIL-P-17555 - Preparation for Delivery of Electronic Equipment; Miscellaneous Elect
9、rical Equipment (Except Rotating Electrical Equipment) and Associated Repair Parts. Plug Connector, for 115-Volt Equipment. MIL-C-18329 - Cable Assemblies, Power, Electrical, 3-Wire 3-Prong, Grounding . .- . NAVY DEPARTMENT _._._. . General Specifications for Inspection of Material. STANDARDS MILITA
10、RY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes. - . . “ . 2.2 Other pablications. - The following document forms a part of this specification. Unless other- wise indicated, the issue in effect on date of invitation for bids shall apply. . . _. _-, . . , . -. ._*-._.- -.
11、-.-. - ._-_ . ._ . ,. _ - -. -. . . . _ -_-. -. - ._._ . _. . NATIONAL BUREAU OF STANDARDS Handbcok H28 - Screw-Thread Standards for Federal Services. . ._ “ (Application for copies should be addressed to the Superintendent of Documents, Government Printing Office, Washington 25, D. C. . -.- 3. REQU
12、IREMENTS 3,l Preproduction model. - After the award of a contract or order and prior to the production or“ any units for fir.al acceptance, the contractor shall furnish a preproduction model for testing of itC performance in accordance with 4.2. Approval of the preproduction model by the bureau or a
13、gency concerned shall not relieve the contractor of his obligation to supply equipment conforming to this specification. No changes or deviations from the preprodliction model will be acceptable without prior written approval from the contracting officer. When the contractor has furnished units of a
14、n identical design under previous con- tracts with the bureau or agency concerned, the preproduction model is not required .- . . 3.2 Material. - Materials not required to conform to a particular specification shall be of the highest . _. - . . - . _-_._._._ .- . . _.-_ . - . .-._-.- _-_ _ _-. _. _.
15、- . _.-._ -. _._ . _.-. . .- -. . quality and free from defects or imperfections. 3.3 or in a self supporting fine mesh steel screen, cadmium plated to a thickness of O. 005 inch without galvanized screen backing. The arrangement of the bed shall insure that no bypassing of nor channeling through th
16、e desiccant shall occur upon settling of the desiccant to 90 percent of its original volume. 3.6 Air passages and connections. - 3.6.1 All air passages shall be castings r welded or brazed steel fabrications which shall be hot dip galvanized after fabrication. Bolted flanges With gaskets shall be us
17、ed where joints or connections are made. The dehumidifiers shall be sealed at the air connections on completion of the shop tests (see 4.5). Soft solder, gunning materials and similar expedients to achieve. tightneeswill not be acceptable. 3.6.2 The location of the fan(s) in the air stream(s) shall
18、be such that no heated air passes through . thefan. . 3.7 Filters. - Filters shall be provided to filter both the reactivation air and the adsorption air before entering the desiccant. They shall be readily accessible for cleaning and replacement. Filters shall be of a type approved by the bureau or
19、 agency concerned. 3.8 Insulation. - The dehumidifiers shall be so constructed and insulated that heat losses and conden- sation shall be kept to a minimum. Insulation shall conform to clase a ai !3pecification MILI-2839. . 3.9 Painting. - 3.9.1 Exterior metal surfaces of the dehumidifier shall be t
20、horoughly cleaned, given one coat of metal conditioner in accordance with Specification MIL-C-15328, followed by one coat of zinc chromate primer in accordance with Specification JAN-P-735 or MIL-P-8585 and two coats of equipment enamel in accordance with class 2 of Specification MIL-E-15090. 3.9.2
21、Faying surfaces of alumnum shall be coated with zinc-chromate primer in accordance with Specification JAN-P-735, and allowed to set before assembly, Copper arid brass shall be insulated from aluminum. 3.10 Identification and label plates. - 3.10.1 The following plates shall be provided. Plates shall
22、 be in accordance with type A of Specifica- . tion MIL-P-15024. (a) Identification plate. . (b) An operating instruction plate giving starting and operating instructions and (c) Warning plates to prevent inadvertent overhaul of any non-overhauling (d) A warning plate in red: “Danger - 440 volts”. th
23、e different settings for various seasons. operating rear which could be damaged thereby. ,/ . 1 i, -_ ._ . . .L *? Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- -. . VIL-D-15215A 44 999990b 02LL35A 7 L5IL-D- 15215A (SRTPS) (e) A warning plate on e
24、ach fan: “Check phasing before starting and rotation (f ) A plate on each fan and each motor showing the direction of rotation. (9) Humid air inlet. (h) Dry air outlet. (i 1 rieactivation air inlet. after starting“. . (I) Reactivation air outlet. (k) .Filter - examine at least every two months. i (e
25、) Connect humidity control leads here. (m) Connect power leads here. (n) Phase A. (9) Fhase B. (pi PhaseC. 3.10.2 Other markings shall be provided where necessary, or where required by referenced specl- . 3.11 Electrical requirements. - 3. il. 1 The dehumidifier shall operate satisfactorily with a p
26、ower source voltage variation of plus or minus .- . fications. 10 percent and a frequency variation of plus or minus 1 cycle. Electrical equipment shall be accessible for servicing. Any electrical equipment which must be installed in an air stream shall be located on the dry air side. Wiring within
27、the equipment shall be in accordance with Specification MILC-915. 3.11.2 Connections and accessories. - Suitable provision for connections to power lines shall be provided. Provision shall be made for connections to an external control switch furnished by the Govern- ment whichwill be closed when de
28、humidification is required, Provision shall be mzde to energize this circuit at 110 volts and O. 5 amperes maximum. A manual control switch shall be provided, permitting opgratipn of the dehumidifier regvdiess of the setting of the external control switch. and shall conform to the following classifi
29、cation: . . - 3.11.3 Motors. - Motors shall be in accordance with Specifications MIL-M-17059-and MILM-17080 . . Service-_-.- C. Rating -_-_- - _-_- :- -_-_- - To suit load requirements. Enclosure - - - - - - - - - - - - - - - - - - - - - - - - Spraytight or in spraytight enclosures Speed . Constant
30、- revolutions per minute (r. p. m.) Duty -_-_-_-_-_ - Continuous. Bearings -_-_-_-_- - _- -_- Ball. Ambiefit 40C. (hose test). to suit load requirements. 3.11.4 Control equipment. - The control equipment shall be in accordance with Specifica; Enclosure . Spraytight or in spraytight enclosures Operat
31、ion . Magnetic. Function Type Across-line. Continuous. Protection _-_-_i - Low voltage release and overload protection. Performance - _ - - - - - - - - - - - - - - - - - - - - Automatic. Ambient . 40C. tioc MiLC-2212 and the following classification: . _-. _._ .- ._-.-._-.-_ I I . _- . ._._ . ._ . -
32、 . -_- ,- - . - (hose test). 1 -_-_- - Motor starting, reversing, and miscellaneous Rating _- - To suit. load requirements, (as required). Duty * -.-_. _.-.-. - -. . -_ _l_l_.l-_- ._._ . _ 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-15235
33、A 44 7777706 0233357 7 I MIL D-15215A (mS) 3. II. 5 hteans shall be provided to insure that the heaters are deenergized whenever: (a) Heater surface temperature dangeraus!y exceeds the desiqn surface tempsrature. (b) When temperature of the rextivation 2ir iangerotsly exceeds desi- Lf I I. .-. . -i
34、-. p . - . -: .- _I . * . 1;: . . . . r;: _. . -.-. -. ,_.* . -. . . , . . , . . . I;. . _.-.- -.- .-. ._. . -._ . - _-.-_-.-_ -_._. -_.- . . - . . LI-_ ,_*_I_-_ _-*-.- -. * Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - . . . . . h9L-D- 15213A (
35、SHJFS) 3.15.7 E!ectrical. - 3.15.7.1 The maximum corrected load shall be 10 kw. for the size 55 - 505 and 4 kw. for the size 20 - 153. . . . .- .- . . 3.15.7.3 Cmtrol arrangements. - Circuits shall be arranged and protective devices shall be pro- vi009 to insure fuli protection of all electrical dev
36、ices. All stich protective devices shall automatically . reset when the need.for protection ceases. Such devices shall renain in proper adjustment under all noraml ccnditions of operation and after repeated functioning as a safety device. In particular thefollowing shall be provided in addition to a
37、ny other protection which may be necessary: (a) bw voltage release for ail motors. (b) Means to inswe that the reactivation heater and fan and the adsorption fan are . - . . -. . ._ . _ . ._. I . I-, _. . -.* period after the heater is de-energized. (d) Overload relays shall be provided for the prot
38、ection of each motor except valve shift motor and timer motor. Fuses shall not be acceptable. to in the assembly of the wiring. The power connections shall be identified for ._ - . -. . .- _ ,. . .- . -.-.- LI- _ I (e) The -atring diagram shall clearly show the phasing and shall be strictly adhered
39、(f ) IfWe valve operator or any similar device is energized from the cantrol circuit .- . the control transformer shall have adequate capacity to carry without damage (9) Thermal overloads shall be sized to protect the associated equipment in an phase. the stalled current of all such devices plus th
40、e control ckcuit load. ambient temperature of 70F. if such devices function during tests at 120F. ambient, oversized thermal protection may be temporarily substituted. In such case the smaller overloads shall be furnished with the equipment and repair parts and shown on all puts lists, but instructi
41、ons shall be included in the technical manual that the larger overloads may be sJbstituted on dehumidifiers, . . operating in high ambient temperatures, otherwise in good repair, on which . . the smaller overload functions too frequently. . . . I _ . 3.16 Type II, single bed dehumidifiers. - _._-_,-
42、.-._. L .-. ._ . .,. LI- 3. 16.1 me size and weight of the dehumidifier shall be kept to a minimum consistent With ruggeh.ess :.: ._._._-_, -: _.-. and serdceabiuty. The weight shall not exceed 125 pounds and the overall dimensions shall be such that suitable handle(s) shall be provided to permit ha
43、ndling by one man. Dehumidifiers shall be suitable for dehumidification of topside preservation packages on Naval ships, dehumidification of vehicles and similar conditions. Dehumidifiers shall be capable of continuous automatic operation on 110 volt, 60 cycle, single. phase, a.c. power. _._. .-. .
44、_” . ae dehumidifier will pass a Navy standard manhole 23 by 15 inches with 7-1/2 inch radius corners. A - .- - . . _I_ I_._._ . ._ . - -.-.-.-. -.,_ _ _.- . .- . .-_.-_._-. . - -.- _- . ._-. . -_.-_ _ -_ .-_ .-.-_. _.-_ ._.-_.- .-.* ._I-._.-._ . _.-_._. . - 8 - - -I- _ . _- . .% . . -_ . . _ .-. .
45、UL . . -_ . _. . , ._ ,., * ._.-.- -.-.-* - _ . - - . I_ . * -. . _ .-. . _, . -. ,_ .- . . .- .-.,. ._ -. . - ._.II -. . ., . - ._. -.- - - A _-_- -_ .- r+-.- . -._. ,I . _- .-. . _._ ,. .-. - q._ _., - . ”_ _., . .,. .- _- . . .*. . .- -.* Provided by IHSNot for ResaleNo reproduction or networking
46、 permitted without license from IHS-,-,-MIL-D-35Z35A qq 7997706 0233363 O MTLD-15215A (SHIPS) 3.16.2 Performance and capacity. - 3.18.2.1 The dehumidifier shall circulate not less than 15 c.f. m. nor more than 33 c. f. m. Waugh resistames external to tihe dehumidifier which develop 1/8 hch water gag
47、e total pressure against 20 c. f. m. At rated airflow its capacity shall be as shovm in table m. Table III - Capacity. ._ . c . _ -_ - . I. . I . _._ . I-_- -I-. -. . . -. Maximum water adsorbed : : Minimum rate of : : water adsorption : : Pounds per ay : Kilowatt - hoUr per pou?d : inlet air conditions : Ery bulb : Relative humidity . . : OF; : Percent : 05 : 35 : 70 : 35 : 40 : 35 ._ 5.4 O. 95 5. O 1.00 2.9 1.40 . 3.16.2.2 The rates of water adsorption shall be based upon the quantity adsorbed during one complete adsorption and reactivation cycle. The rate sh
