MS14-00la-18/25 NOHMI BOSAI LTD. U CONSTRUCTION DETAILS · MS14-00la-19/25 NOHMI BOSAI LTD. Number of source 1 piece per detector As refer to Certificate of Approval of Design for

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MS14-00la-18/25NOHMI BOSAI LTD.

CONSTRUCTION DETAILS

Refer to DETECTOR ASSEMBLY DWG.NO.AF30404000

1. LOWER ENCLOSURE - Component Recognized plastic (QMFZ2) by UL,

Acrylonitrile - chlorinated, polyethylene - styrene (ACS), No.NF-920,rated 94V-0, manufactured by ASAHI CHEMICAL INDUSTRY CO.,LTD. Refer

to DWG.NO.AF20400901d

Same component as used in Model 7155 photoelectric Smoke Detector.

2. COVER - Same material as item 1.

Refer to DWG.NO.CF20401002a.

3. WIND SCREEN- Same material as item 1.Fits in the printed wiring board. Refer to DWG.NO.CF30401003

4. SUPPORT PLATE - Component Recognized plastic (QMFZ2) by UL,

PC/ABS Polymer Alloy Designated "lupilon", NO.PM2220, rated 94V-0,

manufactured by MITSUBISHI ENGINEERING-PLASTIC CORP.

Refer to DWG.NO.AF30404001.

5. OUTER CHAMBER - Stainless steel plate. Approximate overall dimensions

43.2mm ID at bottom, 34mm ID at top, 20.5mm high, Nominally 0.3mm thick.

With 12 smoke entry openings Approx 4.5mm by 7.0mm on cover side.

Refer to DWG.NO.CF30401005.

6. INTERMEDIATE ELECTRODE - Stainless steel plate. Approximate overall

dimensions 27mm OD, 6.2mm high, nominally 0.3mm thick. Refer to

DWG.NO.CF40401010.

7. SC.R.W - Brass, M3X15, Ni plated, four provided.

With spring lock and plain washers.

8. SOURCE - Americium 241 (hermetically sealed)

Manufacturer AEA Technology plc.

Harwell,Oxfordshire,England

Q~)

Product Code

) Source Dimension

Radioactivity

AMMK 7544

Overall 0 2.381- 0 2.391

0.8 microcurie (29.6kBq)

MS14-00la-19/25NOHMI BOSAI LTD.

Number of source 1 piece

per detector

As refer to Certificate of Approval of Design for Special Form Radioactive Material,

the source is loaded into a holder, fixed to the printed wiring board together with

the support plate, and housed in the outer chamber.

As can be seen from DETECTOR ASSEMBLY DWG. NO. AF30404000 / CHAMBER

ASSEMBLY DWG. NO. AF30404098, the whole source is completely shielded with the

metallic outer chamber and shield case so that the source can not be

readily disassembled nor touched with finger.

9. INSECT SCREEN - Stainless steel screen, fits in item 5. Refer to

DWG.NO.CF30401009.

10. SHIELD CASE - Stainless steel plate. Approximate overall dimensions 44.5mm

ID, 6.7mm high, nominally 0.3mm thick. Refer to DWG.NO.AF30401006a.

11. SPRING - Stainless steel spring. Approximate overall dimensions 7.2mm O.D,

9.0mm high, nominally 0.8mm thick. Refer to DWG.NO.AF40404003

12. INDICATING LED - Built-in type.

13. FET - Refer to ELECTRICAL PARTS LIST(Q1)

14. CHECK TERMINAL - Phosphorus bronze, Sn plated, two provided.

Nominally 0.3mm thick. Covered with thermoplastic cube (overall dimensions

approx 6.5 by 6.8mm, 7.2mm high).

15. PRINTED WIRING BOARD - Component Recognized(ZPMV2)

NO.YS-114, maximum solder bath temperature and time limits are not to be

exceeded, Has a minimum flame rating of 94V-0. Refer to DWG.NO.SF30404004

and SF40404005 for Marking and Circuit Patterns information.

16. SCREW - Steel, Zn plated

17. CONTACT BLADE - Brass, Zn-Sn alloying plated, four provided.

Nominally 1.0mm thick. Same component as used in the 7155 Detector.

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1.LOWER ENCLOSURE 11.SPR[NG2.COVER 12.[NDICATING LED3.WIND SCREEN 13.FET4.SUPPORT PLATE 14.CHECK TERMINAL5.OUTER CHAMBER 15.PRINTED WIR[NG BOARD6.INTERMEDIATE ELECTRODE '16.SCREW7.SCREW 17.CONTACT BLADEB.SOURCE 18.NAME PLATE9.INSECT SCREEN 19.UL LABEL

10.SHIELD CASE

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4.SUPPORT PLATES.OUTER CHAMBER6.INTERMEDIATE ELECTRODE7.SCREW8.SOURCE9.INSECT SCREEN

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11 .SPRING12.1NDICATING LED'13.FET14.CHECK TERMINAL15.PRINTED WIRING BOARD

I I I I T I SMK,13-1 aATE I DSMRIPTION RE=V. I CK. APP. ION SMOKE DETECTOR

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SECTION A-A

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a a a

MATERIAL:STAINLESS STEEL PLATE

SUS 3-4, NOMINALLY 0. , THICK

200

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DETAIL "A" (10/)m m ] I

I I I I 104IZATIýpN SMOKE DETECTORNO. DATE Q ESCRIPTION t. AP

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MS14-001 APP.A-11/16

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MS14-001 APP. A-12/16

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MATERIAL SUS3O4-WPADIAMETER OF SPRING MATERIAL(mm) 0.8AVERAGE DIAMETER OF COIL (mm) 7.2INSIDE DIAMETER OF COIL (mm) 6.4EFFECTIVE NUMBER OF COILS 4.5TOTAL NUMBER OF SPRING COILS 6.5THE DIRECTION OF A VOLUME RIGHTFREE HEIGHT (mm) 9

HEIBH (mm) 5.5FOR ASSEMBLY JIGT (m .

ASB OVERWEIGHT (N) 7.7N±IO1SPRING CONSTANT 0.22

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I I IITLE;DATE DESCRIPTION REV. I CHK. APP. IONIZATION SMOKE DETECTOR

•IFo Ta'MIsE L UNIT; mm SCALE; 5 / I:6o=±o.5 OATE; SEP. 25 2002

to ..... 3:•L-. ANGLE DESIGNED BY TRACEO BY DWG. NO.* 30 ..... 70=±1.0

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MS14-001 APP.A-13/16

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