Bobrick DuraDry B-770 Troubleshooting And Information Manual
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Bobrick DuraDry B-770 Troubleshooting And Information Manual

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Dryer Troubleshooting and Information Guide
All Bobrick dryers require cleaning every 6 months to ensure that
they function effectively. Please note that failing to clean the dryer
BOBRICK DOMESTIC
Email:
customerservice@bobrick.com
Corporate Office - Los Angeles - Bobrick Washroom Equipment
6901 Tujunga Avenue, North Hollywood, California 91605-6213
Customer Service: 818.982.9600, Fax: 818.503.9287
New York - Bobrick Washroom Equipment, Inc.
200 Commerce Drive, Clifton Park, New York 12065-1350
Customer Service: 518.877.7444, Fax: 518.877.5029
Canada - Bobrick Washroom Equipment Company
45 Rolark Drive, Scarborough, Ontario M1R 3B1
Customer Service: Eastern Canada: 877.423.6555, Fax: 423.765.8555
Western Canada: 877.423.6444, Fax: 423.503.8444
BOBRICK INTERNATIONAL
Email:
international@bobrick.com
Corporate Office - Bobrick Washroom Equipment, Inc.
6901 Tujunga Avenue,, North Hollywood, California 91605-6213 USA
Customer Service: +1 818.764.1000, Fax: +1 818.503.9941;
United Kingdom Bobrick Washroom Equipment Limited
Phone: +44 (0)20.8366.1771, Fax: +44 (0)20 8363 5794; Email:
Germany Phone: 0800.79.00.456; Email:
Australia Bobrick Washroom Equipment Pty. Ltd.
Phone: +1800 353158, Fax: +1800 221926; Email:
DuraDry B-770, B-778
may result in malfunction and can void the warranty.
www.bobrick.com
info@bobrick.de
info@bobrick.com.au
Effective 6/1/19
info@borick.co.uk

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Summary of Contents for Bobrick DuraDry B-770

  • Page 1 DuraDry B-770, B-778 Dryer Troubleshooting and Information Guide Effective 6/1/19 All Bobrick dryers require cleaning every 6 months to ensure that they function effectively. Please note that failing to clean the dryer may result in malfunction and can void the warranty.

  • Page 2: Table Of Contents

    DuraDry B-770, B-778 Dryers Contents Page Instructions For Using The Dryer Guide ..........

  • Page 3: Instructions For Using The Dryer Guide

    If the dryer still does not function after cleaning, then continue filling out the Dryer Service Information Sheet. • Inform the customer/end user that the malfunctioning/replaced parts must be returned to the Bobrick Customer Service Department or a charge will be made for replacement parts.

  • Page 4: Dryer Service Information Sheet

    Repair kit/parts required (if dryer needs to be returned write RETURN): Return Part number(s) for replacements: Complete Unit Replaced on SO #: ________________ ANY DEFECTIVE PARTS MUST ACCOMPANY THIS COMPLETED SHEET TO BOBRICK’S SERVICE DEPARTMENT. Information sheet completed by: Your Name Completion Date:6/6/20 Branch/Rep Firm: _________________________________________________________ Form No.

  • Page 5: Date Code Information

    Date Code Information The date code on all Bobrick Dryers is found on the upper left corner of the rating label and on the serial number label. The date code will contain two digits and one letter. The digits designate the week and the letter designates the year.

  • Page 6: Routine Maintenance Instructions

    Should be cleaned with a damp cloth, DO NOT use aggressive cleaners or solvents as they may permanently damage the surface. Bobrick dryers are drip proof (IP21 or better, see rating label). DO NOT spray with liquids to an extent that they could enter the unit.

  • Page 7: Product Identification

    DuraDry Dryer B-770 White cover B-778 Chrome cover...

  • Page 8: Cover Removal

    Instructions for Removal of Dryer Cover Warning Disconnect power Risk of electric supply before shock removing cover To Remove Cover 1. Start installation of dryer by removing cover. To loosen two cover bolts, insert Allen Wrench (provided with dryer) into holes located on bottom of cover. Make sure wrench fits into head of cover bolts and turn clockwise until bolts stop turning.

  • Page 9: Diagnostic Sheet

    Diagnostic Sheet for DuraDry B-770, B-778 Dryers Problem Possible Cause Possible Solution AUTOMATIC 1. Dryer does not run a) No electricity supply Check main supply / wiring b) Installation fault Check service manual for possible wiring mistakes c) Worn motor brushes Check length of brushes;...

  • Page 10: Screwdriver Test

    Screwdriver Test for Touch Button Dryers Warning Disconnect power Risk of electric supply before shock removing cover NOTE: This test instruction sheet is not for dissemination to, and should not be disseminated to, the public including end users. This test is designed to test the Touch Timer Assembly and the Sensor Board. Instructions for Test: 1.

  • Page 11: Field Replacement Parts

    Field Replacement Parts • Replacement parts are intended to be issued by Bobrick after completion of diagnostic sheets and a problem is identified that involves replacement of parts. • Replacement parts will then be sold to the customer/rep with credit issued upon the return of identifiable malfunctioning and/or unused parts.

  • Page 12: Cover Replacement

    Cover Replacement Warning Disconnect power Risk of electric supply before shock removing cover To Replace Cover 1. Replace cover by positioning top of cover on studs on top of mounting base and tipping bottom of cover toward wall. Push bottom of cover firmly against wall. NOTE: Space between cover and wall must be the same on four sides.

  • Page 13: Installation Of Touch Controller

    Installation of Touch Controller To Remove Existing Timer 1. Disconnect the power supply and remove the cover. 2. Remove the timer from the base plate by unscrewing the two screws securing the timer bracket to the base. On recessed dryers the timer bracket is secured to a metal angle bracket, this bracket with its screws must be removed and retained for use on the replacement timer.

  • Page 14: Installation Of Base Plate Mounted Triac

    Installation of Base Plate Mounted Triac Note: This procedure applies only to surface-mounted or recessed dryers with triac mounted on the base plate. For touch button models with triac mounted on the timer bracket, the complete timer assembly must be replaced. Warning Disconnect power Risk of electric...

  • Page 15: Installation Of Automatic Controller

    Installation of Automatic Controller Warning Disconnect power Risk of electric supply before shock removing cover Older units have an intermediate plug and socket in the wiring, this has now been discontinued and can be removed with the faulty controller. The wiring on older units may be sleeved, this was later replaced by plastic cable ties. Some early 115 volt dryers had 4 way terminal blocks instead of the current 3 way blocks, in these dryers the wires to the 4th terminal should not be disturbed.

  • Page 16: Instructions For Installation Of Sensor Board

    Instructions for Installation of Sensor Board There are two methods fixing sensor boards. 1. Fixed with five screws, Fig 1. 2. Fixed with three screws, Fig 2. Warning Disconnect power In both cases the orientation of the board is critical. Risk of electric supply before shock...

  • Page 17: Instructions For The Replacement Of Motor Brushes

    Instructions for the Replacement of Motor Brushes Warning Disconnect power Risk of electric supply before shock removing cover The brush spares kit contains two brushes. Always replace BOTH brushes. EMD MOTOR To remove the brush: 1. Squeeze the sides of the retainer and ease it over the stud with a small screwdriver.

  • Page 18: Installation Of Surface-Mounted Hand Dryers

    INSTALLATION INSTRUCTIONS BOBRICK SURFACE-MOUNTED HAND DRYERS ELECTRICAL CHARACTERISTICS. 115V AC, 20 Amp, 50/60 Hz, Single Phase, UL/c-UL listed. 208–240V AC, 9–10 Amp, 50/60 Hz, Single Phase, UL/c-UL listed, VDE approved. REMOVAL OF COVER Start installation of dryer by removing cover. To loosen two cover bolts insert Allen Wrench, provided with dryer, into holes located on bottom of cover on each side of air intake grille.

  • Page 19: Recommended Mounting Heights

    RECOMMENDED MOUNTING HEIGHTS. Distance from floor to bottom mounting screw holes of mounting base (Dimension A). Hand dryer. Men’s Washroom......46'' (117cm) Women’s Washrooms.
  • Page 20 REPLACE COVER. Replace cover by positioning top of cover on studs on top of mounting base and tipping bottom of cover toward wall. Push bottom of cover firmly against wall. NOTE: Space between cover and wall must be the same on four sides. To tighten two cover bolts, insert Allen wrench into holes on bottom of cover.

  • Page 21: Schematic Diagrams

    SCHEMATIC DIAGRAM 15V DRYER SCHEMATIC DIAGRAM 208-240V AUTOMATIC DRYER...

  • Page 22: Warranty

    This warranty is limited to repair or exchange of defective parts at the option of Bobrick. THIS WARRANTY DOES NOT COVER ACCIDENTAL DAMAGE, IMPROPER...

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