Bacharach LS-20B Manual
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Bacharach LS-20B Manual

Leak standard
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CHECKING MATERIAL RECEIVED................................................... 2
DESCRIPTION ....................................................................................... 2
Components....................................................................................... 4
OPERATION ........................................................................................... 5
Preparation for Operation ................................................................ 5
Applications....................................................................................... 6
Operational Procedure...................................................................... 7
PRINCIPLES OF OPERATION............................................................. 9
MAINTENANCE .................................................................................. 10
Refilling Leak Standard ................................................................ 10
Replacing Leak Capillary ............................................................... 13
APPLICATION DATA .......................................................................... 14
RENEWAL PARTS ............................................................................... 16
SERVICE CENTERS............................................................................ 17
Printed in U.S.A.
Type LS-20B
Leak Standard
CONTENTS
IM 11U4B1-01E
3rd editiion
3015-1942
Page
® Registered Trademark

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Summary of Contents for Bacharach LS-20B

  • Page 1: Table Of Contents

    IM 11U4B1-01E 3rd editiion 3015-1942 Type LS-20B Leak Standard CONTENTS Page CHECKING MATERIAL RECEIVED........... 2 DESCRIPTION ..................2 Components..................4 OPERATION ................... 5 Preparation for Operation ..............5 Applications..................6 Operational Procedure..............7 PRINCIPLES OF OPERATION............. 9 MAINTENANCE .................. 10 Refilling Leak Standard ..............

  • Page 2: Checking Material Received

    Refrigerant-12 or Refrigerant- 134a, through a glass capillary marked PROBE, to the atmosphere at a known rate. This known rate is adjustable when using an LS-20B Leak Standard. The Leak Standard is intended primarily for use with...
  • Page 3 Description Fig. 1. Type LS-20B Leak Standard and Accessories Fig. 2. Type LS-20B, Outline Dimensions...

  • Page 4: Components

    Type LS-20B Leak Standard COMPONENTS The Type LS-20B Leak Standard is a compact instrument consist- ing of the following seven functional components (see Fig. 3): 1. A direct reading LEAK RATE gage (calibrated in ounces of R-12 or R-134a per year).

  • Page 5: Operation

    Operation OPERATION PREPARATION FOR OPERATION 1. Remove the protective caps from the leak capillary in PROBE fitting and from the VENT. 2. To increase the leak rate, slowly turn the INCREASE valve knob counterclockwise until the instrument’s LEAK RATE gage pointer starts to move up scale.

  • Page 6: Applications

    Type LS-20B Leak Standard NOTE: When the leak rate is being decreased, the refrigerant gas is allowed to escape through the Vent to atmosphere. During this operation it is best to remove the Leak Standard from the test area. If this is not pos- sible, attach the VENT TUBING to the vent and lead the tubing out a window or to the floor.

  • Page 7: Operational Procedure

    Operation OPERATIONAL PROCEDURE CAUTION: Never allow any grease or liquid to enter the LEAK CAPILLARY, as it may plug or alter its leak rate. When the Leak Standard is not in use, it is recom- mended that the instrument pointer be set at half scale, and that the PROTECTIVE CAPS be placed over the VENT and LEAK CAPILLARY.
  • Page 8 Type LS-20B Leak Standard 3. Repeat the above procedure, reducing or increasing the sensitiv- ity of the leak detector each time, until the leak detector signal is adequate. 4. Replace the protective cap on the LEAK CAPILLARY and pro- ceed to probe the suspected leak area, following the procedure outlined in the leak detector’s instruction manual.

  • Page 9: Principles Of Operation

    Operation PRINCIPLES OF OPERATION The Type LS-20B Leak Standard is shown schematically in Fig.5; and operates as discussed below. The filler tank provides a supply or R-12 / R-134a liquid under its own partial pressure. The INCREASE valve controls the amount of refrigerant gas fed from the filler tank to the ballast tank, the leak-rate gage, and the leak capillary.

  • Page 10: Maintenance

    CAUTION: In order to assure that no dirt or other contamination gets into the LS-20B during refilling operations, make sure that all couplings and valves are clean. NOTE: Because refrigerant gas will escape during the refilling operation, this procedure should be performed outside the testing area to avoid contaminating the air in the area.
  • Page 11 Maintnenace a. When using a plain-top can of refrigerant, use the valve and prong clamp only; and then: 1. Force the clamp onto the can closure cap until all three prongs are securely engaged under the closure cap lid. 2. Make sure that the valve is closed; then, thread the valve clockwise into the clamp until the can is pierced.
  • Page 12 Type LS-20B Leak Standard 8. Open DECREASE valve one and one-half turns (counterclockwise). 9. IMPORTANT: This step pertains to the actual charging of the Leak Standard (which requires approximately five seconds). It MUST be read thoroughly before proceeding. It is normal for some gas to escape during this procedure.

  • Page 13: Replacing Leak Capillary

    Maintnenace 12. First remove can of refrigerant from coupler (by turning knurled sleeve with fingers), and then remove coupler from up- per tank (using the wrench). Immediately replace plug in upper tank and firmly tighten while holding the upper tank by hand. The filler fitting on the upper tank contains a ball check that may leak slightly until plug is replaced.

  • Page 14: Application Data

    Type LS-20B Leak Standard APPLICATION DATA EQUIVALENT LEAK RATES In the following table all numbers on the same line (reading across) are approximate leak values at the same pressure through the same physical leak and for all practical purposes may by used interchangeably.
  • Page 15 Maintnenace � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �...

  • Page 16: Renewal Parts

    Type LS-20B Leak Standard RENEWAL PARTS Renewal parts should be ordered through Bacharach, Inc. When ordering parts, a description of the part and its complete catalog number should be supplied. Description Part No. R-12 R-134a Cap and Chain 3015-1283 3015-1283...

  • Page 17: Service Centers

    Service SERVICE CENTERS United States Canada California Bacharach of Canada, Inc. 250 Shields Court Unit #3 7281 Garden Grove Blvd., Markham, Ontario L3R 9W7 Canada Suite H Phone: 905-470-8985 Garden Grove, CA 92841 Fax: 905-470-8963 Phone: 714-895-0050 E-mail: bachcan@idirect.com Fax: 714-895-7950 E-mail: calservice@bacharach-inc.com...
  • Page 18 Type LS-20B Leak Standard NOTES:...
  • Page 19 NOTES:...
  • Page 20 Bacharach, Inc. 2 Dart Road, Newnan GA 30265 Ph: 678-423-2481 • Fax: 678-423-2479 Website: www.bacharach-inc.com • E-mail: help@bacharach-inc.com Printed in U.S.A.

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