Bobrick B-770 Owner's manual

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.

www.bobrick.com

BOBRICK DOMESTIC

Email: [email protected]

Corporate Ofce - 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: [email protected]

Corporate Ofce - 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: [email protected]

Germany Phone: 0800.79.00.456; Email: [email protected]

Australia Bobrick Washroom Equipment Pty. Ltd.

Phone: +1800 353158, Fax: +1800 221926; Email: [email protected]

DuraDry B-770, B-778 Dryers

Contents Page

Instructions For Using The Dryer Guide ..............................................3

Dryer Service Information Sheet ....................................................4

Date Code Information ...........................................................5

Routine Maintenance Instructions ...................................................6

Product Identication.............................................................7

Cover removal ..................................................................8

Diagnostic Sheet ................................................................9

Screwdriver Test ...............................................................10

Field Replacement Parts .........................................................11

Cover Replacement.............................................................12

Installation of Touch Controller ....................................................13

Installation of Base Plate Mounted Triac .............................................14

Installation of Automatic Controller .................................................15

Instructions for Installation of Sensor Board ..........................................16

Instructions for the Replacement of Motor Brushes ....................................17

Installation of Surface-Mounted Hand Dryers .........................................18

Recommended Mounting Heights. .................................................19

Schematic Diagrams ............................................................21

Warranty .....................................................................22

Instructions For Using The Dryer Guide

• Signs for your safety: General mandatory sign (to be

accompanied where necessary by

another sign)

Danger: Electricity

• Please ll out the Dryer Service Information Sheet completely. If a section is not necessary/available

insert N/A in the space.

• If the faulty dryer has been installed for 2 months or less, then replace complete dryer and return

faulty unit to the nearest Bobrick Customer Service Department.

• When you receive a call concerning a dryer problem inform, the customer/end user to clean the

dryer and check the motor brushes before going on with diagnosing the problem. Fax them the

cleaning instructions from the guide. If the dryer still does not function after cleaning,

then continue lling 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.

Dryer Service Information Sheet

Distributor/Rep/End-User Name: Bobrick’s best

Address: 12345 Your Street, Suite 100

City: Toon Town State: Your State Zip code: 98765

Job Name: Fantasy Lane Job Location: My Town

Contact Name: Jessica Rabbit Telephone: (555) 555-3333 Fax: (555) 555-4444

Email: [email protected] Account #: 99999 Sales order #: 246810

Invoice #:35791 Invoice Date: 03/03/20

Dryer Model Information:

Automatic Dryer: __P__TouchButton Dryer: (check one)

Dryer: __P_ Dryer: _____ (check one)

Dryer model #/voltage: 700 115V

Quantity defective: 1 Quantity on job: 2 Date of installation: 06/03/20

Date code (as seen on bottom edge of cover on dryer UL label. For example: 04A): ________________________

Dryer Information:

When did dryer problems rst occur from date of installation?

(Circle one) Upon 2+ Out of

Installation Months Warranty

If dryer problem occurred within two months of installation, REPLACE dryer and return faulty dryer.

Does the dryer in any way function now? No (Yes or No)

Has the dryer been cleaned in the past 6 months? No (Yes or No). If No, send a cleaning sheet and await outcome.

Full description of fault: Unit would not start upon installation.

Reference to Diagnostic Sheets:

Problem and possible solution: Faulty controller

Problem number(s) (as seen in left margin on diagnostic sheet): # 1 F

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. CSD-1196 ST Rev. 4/19 Bobrick Washroom Equipment, Inc. Printed in U.S.A.

0–2

Months

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.

Example: 30Z week thirty, year 2000.

All digits and letters are in ascending order.

Weeks are numbered from 1 to 52 for each year.

Rating Label

Serial Number Label

Date code and

serial number

V = 2019

U = 2018

T = 2017

S = 2016

R = 2015

P = 2014

N = 2013

M = 2012

L = 2011

K = 2010

J = 2009

H = 2008

G = 2007

F = 2006

E = 2005

D = 2004

C = 2003

B = 2002

A = 2001

Z = 2000

Y = 1999

X = 1998

W = 1997

V = 1996

U = 1995

T = 1994

S = 1993

R = 1992

P = 1991

N = 1990

M = 1989

Routine Maintenance Instructions

• 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.

• If the dryer is installed in an area prone to dust and dirt this cleaning procedure should be carried

out more frequently.

• Check the length of motor brushes, where applicable, when performing the cleaning procedure.

Cleaning Instructions:

a) The Exterior of Cover

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.

b) The Interior

Having turned off all power to the dryer, remove the cover.

Using a small brush or vacuum, carefully clean out the build up of dust and lint.

Check the length of the motor brushes. If less than ½'' replace. Check that motor brushes are i

installed correctly and that brushes are worn evenly.

Replace the cover.

Turn the power back on.

Warning

Risk of electric

shock

Disconnect power

supply before

removing cover

DuraDry Dryer

B-770 White cover

B-778 Chrome cover

Instructions for Removal of Dryer Cover

Warning

Risk of electric

shock

Disconnect power

supply before

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 ts into head of cover

bolts and turn clockwise until bolts stop turning. When cover bolts are screwed out all the way, cover

can be removed.

2. To remove cover, place a hand on each side of cover and push up toward top of dryer releasing

cover from studs at top of mounting base. Lift cover off mounting base by pulling forward at the

bottom and upward at the same time.

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; replace

if less than ½''

d) Element open circuit Return dryer to Bobrick for repair

e) Control nonstart Replace control

f) Triac open circuit Replace triac

2. Sparks from dryer Worn motor brushes Replace motor brushes

3. Dryer runs at low speed a) Worn motor brushes Replace motor brushes

b) Triac halfwave Remove white wire from triac; no

difference, replace triac

c) Control halfwave Remove white wire from triac;

dryer stops, replace control

4. Dryer runs continuously a) Triac short circuit Remove white wire from triac; no

difference, replace triac

b) Control faulty Remove white wire from triac;

dryer stops, replace control

5. Dryer cycles on and off Control Replace control

6. Dryer sometimes runs Dirty control lens Clean control lens

Control Replace control

7. Dryer is oversensitive Control Replace control

8. Dryer blows cold air or motor runs fast Heating element Return dryer to Bobrick for repairs

9. Grinding noise from dryer a) Worn motor brushes Replace motor brushes

b) Fan cage is bent or damaged Return dryer to Bobrick for repairs

10. Dryer does not run and Worn motor brushes Replace motor brushes; if still not

heating element glows functioning after replacing the

motor brushes, return dryer to

Bobrick for repairs.

TOUCHBUTTON

1. Dryer does not run a) No electricity supply Check main supply / wiring

b) Installation fault Check service manual for possible

wiring mistakes

c) Tabs are not connecting Turn off power, remove cover and

bend tabs closer to sensor board

d) Worn motor brushes Check length of brushes; replace

if less than ½''

e) Element open circuit Return dryer to Bobrick for repair

f) Timer assembly nonstart Perform Screwdriver Test (see test

instructions)

2. Sparks from dryer Worn motor brushes Replace motor brushes

3. Dryer does not run and Worn motor brushes Replace motor brushes; if still not

heating element glows functioning after replacing the

motor brushes, return dryer to

Bobrick for repairs.

4. Dryer runs at low speed a) Worn motor brushes Replace motor brushes

b) Timer assembly Replace timer assembly

5. Dryer runs continuously b) Timer assembly Replace timer assembly

6. Dryer blows cold air Heating element Return dryer to Bobrick for repair

7. Grinding noise from dryer a) Worn motor brushes Replace motor brushes

b) Fan cage is bent or damaged Return dryer to Bobrick for repair

8. Dryer is oversensitive and a) Button loose Pack button O ring with tape

switches on or off randomly b) Timer assembly or crystal board Perform Screwdriver Test (see test

instructions)

9. Dryer cycles on and off Timer assembly or crystal board Perform Screwdriver Test (see test

instructions)

Screwdriver Test for Touch Button Dryers

Warning

Risk of electric

shock

Disconnect power

supply before

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. Turn off the power to dryer.

2. Remove dryer cover.

3. Turn on the power. Do not touch any part of the dryer.

4. Using an insulated screwdriver, short across the two tabs (see below).

a) If dryer runs sensor board may be faulty replace sensor board.

b) If dryer does not runtimer may be faulty replace touch controller.

5. Turn off power to dryer.

6. Put dryer cover back on and turn power on.

Other manuals for B-770

This manual suits for next models

Table of contents

Other Bobrick Dryer manuals

Bobrick

Bobrick CompacDryer User manual

Bobrick

Bobrick CompacDryer B-710 Owner's manual

Bobrick

Bobrick Cub B-705 User manual

Bobrick

Bobrick B-700 User manual

Bobrick

Bobrick fino B-717X User manual

Bobrick

Bobrick TrimLine B-7120 User manual

Bobrick

Bobrick fino B-7179 User manual

Bobrick

Bobrick B-7125 InstaDry Owner's manual

Bobrick

Bobrick EclipseDryer User manual

Bobrick

Bobrick B-7125 InstaDry User manual

Bobrick

Bobrick B-778 User manual

Bobrick

Bobrick TerraDry QuietDry B-7180 User manual

Bobrick

Bobrick AirCraft B-750 User manual

Bobrick

Bobrick B-770 User manual

Bobrick

Bobrick ELAN B-715 User manual

Bobrick

Bobrick EclipseDryer B-740 User manual

Bobrick

Bobrick COMPACDRYER B-710E User manual

Bobrick

Bobrick TerraDry QuietDry Series User manual

Bobrick

Bobrick AirCraft B-7507 User manual

Bobrick

Bobrick AirCraft B-701B Owner's manual

Bobrick

Bobrick AirCraft Series Owner's manual

Bobrick

Bobrick B-9100 PureDri User manual

Bobrick

Bobrick ECLIPSE B-740 User manual

Bobrick

Bobrick B-700 User manual

Popular Dryer manuals by other brands

Bosch

Bosch WTA79200GB Installation and operating instructions

Amana

Amana W10233410A Use and care guide

Miele

Miele TWH 780 WP operating instructions

Asko

Asko T760 user guide

Alliance Laundry Systems

Alliance Laundry Systems 25 Series Original instructions

Bosch

Bosch Logixx 10 WTB76556GB Instruction manual and installation instructions

STIEBEL ELTRON

STIEBEL ELTRON Ultronic S Operation and installation

Electrolux

Electrolux EW2H328R2 user manual

Beko

Beko DS8433RX1M user manual

Dawlance

Dawlance Spinner DS 6000 C owner's manual

Electrolux

Electrolux TP5080TW user manual

AEG

AEG TR838P4OB user manual

Indesit

Indesit IDV 75 instruction manual

Infiniton

Infiniton SD-DG85C manual

BOMANN

BOMANN WT 5019 instruction manual

Alliance Laundry Systems

Alliance Laundry Systems TMB795C Installation

Asko

Asko T793C operating instructions

Kenmore

Kenmore 8041 - 5.8 cu. Ft. Capacity Electric Dryer installation instructions