Haws VRKHO7 Guide
10/21 Model VRKHO7 Page 1 of 4
NO. OOO2076521 (0)
1455 Kleppe Lane Sparks, NV 89431-6467 (775) 359-4712 Fax (775) 359-7424
E-mail: haws@hawsco.com website: www.hawsco.com
No. 0580001163 (2)
Model VRKHO7
PLUG-IN TRANSFORMERFOR RKHO
INSTALLATION, OPERATION
&
MAINTENANCE INSTRUCTIONS
LIMITED WARRANTY
HAWS warrants that all of its products are guaranteed against defective material or poor workmanship
for a period of one year from the date of shipment. The foregoing notwithstanding, HAWS warrants
certain specific products or components thereof for an adjusted period. A list of these excepted products
and components and a description of their respective warranty terms may be found here:
www.hawsco.com/warranty. HAWS’liability under thiswarranty shall be discharged by furnishing without
charge F.O.B. HAWS factory any goods, or part thereof, which shall appear to the Company upon
inspection to be of defective material or not of first-class workmanship, provided thata claim is made in
writing to Companywithin a reasonable period after receiptof the product. Where claims for defects are
made, the defective part or parts shall be delivered to the Company, prepaid,for inspection. HAWSshall
not be liable for the cost of repairs, alterations or replacements, or the labor required to implement them,
or for any expense connected therewith made by the owner or owner’s agents, except upon written
authority fromHAWS. HAWSshall not be liable for any damagescaused by defective materials or poor
workmanship,exceptforreplacements,as provided above.Buyeragrees that HAWShas made no other
warranties either express or implied in addition to those above stated, exceptthat of title with respect to
any of the products or equipment sold hereunder and that HAWSshall not be liable for general, special,
incidental, or consequential damagesclaimed to arise underthe contract of sale.
Equipment manufactured by HAWSis warranted to function if installation and maintenance instructions
provided are adhered to.The units also mustbe used forthe purpose for which they were intended. Any
HAWS emergency equipment is intended to supplement first-aid treatment. Due to widely varying
conditions, HAWScannot guarantee that the use of this emergency equipment will preventserious injury
or the aggravation of existing or prior injuries.
EXCEPT AS EXPRESSLY STATED HEREIN, HAWS HEREBY DISCLAIMS ALL WARRANTIES,
WHETHER EXPRESS OR IMPLIED, ARISING BY LAW OR OTHERWISE, INCLUDING WITHOUT
LIMITATION, ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. THIS WARRANTY MAY NOT BE MODIFIED OR EXTENDED WITHOUT
THE WRITTEN CONSENT OF HAWS. REMEDIES AND REPLACEMENTS STATED HEREIN ARE
EXCLUSIVE. IN NO EVENT SHALL HAWS BE LIABLE FOR ANY SPECIAL, PUNITIVE,
CONSEQUENTIAL OR INCIDENTAL DAMAGES TO ANY PERSONINCLUDING BUT NOT LIMITED
TO DAMAGES FOR LOSS OF USE OR PROFITS, SUBSTITUTE PRODUCTS OR COSTS,
PROPERTY DAMAGE, OR OTHER MONETARY LOSS.
NOTE TO INSTALLER: Please leave this information with the Maintenance Department.
CAUTION! Priortomaking any electrical connections, verify witha voltmeter that power
from the servicepanel is off.
10/21 Model VRKHO7 Page 2 of 4
Recommended Tools: None
INSTALLATIONPROCEDURE
Step 1: Removegrille (if applicable) and shut off watersupply. Actuate sensor to relieve
pressure in the system. Then, disconnect power from plug-in transformer.
Step 2: Disconnect transformerelectrical connector.Discard old transformer.
Step 3: Connect replacement transformerelectrical connectors. Referto VRKHO7Wiring
Schematic on page 4 of 4.
Step 4: Reconnectpower to transformer.Turn on water supply and adjust the bubbler’s flow
using the black regulator mounted next to the solenoid valve. Clockwiseadjustment
increases flow and counterclockwisedecreases flow.Finally, check fountain for
leaks.
Step 8: Clear the area in frontof the sensor. Allow the sensor to calibrate for at least 10
seconds beforeoperating.
When the sensor is activatedcontinuously for30 seconds, the sensor will
automatically shut offthewater supply to the bubbler. To resume activation, remove
obstruction and reactivate the sensor. This featureprevents flushing of water due to
unintentional activation or vandalism.
Step 9: Re-install bottom plate and grille (if applicable).
SHOULD YOU EXPERIENCE DIFFICULTY WITH THE INSTALLATION OF THIS
MODEL PLEASE CALL:
TECHNICALSUPPORT: 1-800-766-5612
FOR CUSTOMER SERVICE: 1-888-640-4297
10/21 Model VRKHO7 Page 3 of 4
SENSOR/SOLENOID TROUBLESHOOTING
PROBLEM
REPAIR CHECKLIST
1.
Insufficientbubbler flow.
a.
Check that screwdriverstop is wide open.
Direction can be counterclockwiseor
clockwisedepending on style of shut-off valve.
b.
Verify minimum 30 psi supply pressure.
c.
Clean inlet strainer (if one is present).
3.
No bubbler flow –red light in the
sensor does not flash oncewhen
user’s hands are within the
sensor’s range
a.
b.
Unit is in Security Mode.
Sensor is picking up reflections from a foreign
object. Eliminate the source of reflection.
4.
No bubbler flow –red light in the
sensor flashes once when user’s
hands are within sensor range.
a.
b.
c.
d.
Connectors between electronic unit and
solenoid are disconnected. Reconnectthe
connectors.
Debris or scale in solenoid. Shut off waterand
power. Unscrewsolenoid, pull out the plunger
and spring from the solenoid and clean them.
Use scale removerif needed. When replacing
the plunger, ensure the spring is oriented
vertically.
The central orifice in the diaphragm is plugged
or the diaphragm is torn. Clean the orificeor
replace the diaphragm.
The water supply pressure is higher than 115
psi. Reduce the supply waterpressure.
4.
Continuous bubbler flow –sensor
flashes oncewhen user’s hands
are within the sensor’s range.
a.
Debris or scale in solenoid diaphragm. Clean
the orifice or replace diaphragm per 4b-c.
5.
Continuous bubbler flow –red light
in the sensor does not flash once
when user’s hands are within
sensor range.
a.
b.
Sensor is dirty or covered. Clean or eliminate
case of interference. In this event, the security
time will stop flow.
Sensor is picking up reflections from the
washbasin or another object. Decrease the
range or eliminate the cause of reflection.
6.
Repeated clogs in strainer.
a.
Install water filter in supply line.
7.
Bubbler does not activate.
a.
Check wiring harness. Replace if necessary.
b.
Check solenoid valve. Replace if necessary.
c.
Replace sensor.
d.
Check transformerfor 9V at output terminals;
replace if necessary.
© 2021 Haws®Corporation –All Rights Reserved
HAWS® and other trademarks used in these materials are the exclusive property of Haws Corporation.
APPROVED:
DRAWN:
PART NUMBER
SCALE: SHEET OF
REVISION
DRAWING TYPE: SIZE: A
BY:ECN NO.
DATE:
DATE:
ECN:
REVISED PER
CHK'D.:
Haws Corporation - All Rights Reserved. HAWS and other trademarks used in these materials are the exclusive property of Haws Corporation.
CR
MODEL(S)
1455 KLEPPE LANE
SPARKS, NEVADA 89431
(775) 359-4712 FAX (775) 359-7424
E-MAIL: [email protected]
WEBSITE: WWW.HAWSCO.COM
THIS DOCUMENT IS TRUE AND CORRECT AT TIME OF PUBLICATION. CONTINUED PRODUCT IMPROVEMENTS
MAKE SPECIFICATIONS AND MEASUREMENTS SUBJECT TO CHANGE WITHOUT NOTICE.
BJM
02/12/21
2
0580001163.D
VRKHO7
PLUG-IN TRANSFORMER FOR RKHO
N/A
44
FV
10/26/21
5649
BJM
INSTALLATION
5749
2021
FV
SENSOR TRANSFORMER
SOLENOID
VALVE
VRKHO7 WIRING SCHEMATIC
PLUG-IN TRANSFORMER
