VOX electronics WHD 502 User manual

ELECTRICAL
WATER HE ATER
USER MANUAL
WHD 502 / WHD 802
WHM 351 / WHM 502
WHM 802 / WHM 1002

2
Dear Customer,
First of all, congratulations for choosing a nature and technology
friendly VOX product.
Aspiring to present products above and beyond your expectations,
which is manufactured meticulously at VOX’s modern plants and
rigorously quality-controlled, into your use. This operating manual
will guide you through the use of your appliance. You will see that
your appliance is equipped with the most advanced technological
solutions and quite easy to use.
The life of your appliance will prolong if you perform necessary
care and maintenance procedures.
We hope you enjoy using your appliance.
Important Information on Safety
This operating manual includes important information on getting
your appliance started, and its safety, intended use, cleaning and
maintenance.
Always keep this operating manual with your appliance. Whenever
you lend your appliance, give this operating manual as well.
Read the operating manual carefully before using your appliance
to prevent burns, electric shocks, fire or injury risk, and follow the in-
structions on operating your appliance, troubleshooting and clean-
ing.
The water heater must be mounted by VOX Authorized Service.
The water heater must absolutely be grounded.
WARNING: Denotes death or severe injury risk.
CAUTION: Denotes injury or property damage risk.

3
Contents
Safety Warnings ..............................................................................4
Safety Information on the Installation of the Appliance ��������������4
Safety Information on the Use of the Appliance ��������������������������5
Safety Information to Take into Consideration During Cleaning
and Maintenance ������������������������������������������������������������������������������8
Safety Information to Take into Consideration During Handling
and Transportation����������������������������������������������������������������������������9
Installation .......................................................................................9
Choosing the Mounting Position ���������������������������������������������������9
Liability Limitation ..........................................................................9
Technical Specifications (Digital) .................................................10
Technical Specifications (Analog)..................................................11
Electrical Connections ��������������������������������������������������������������������12
General View (Digital) .................................................................. 13
Controls and Indicators ................................................................. 13
General View (Analog).................................................................. 14
Controls and Indicators ................................................................. 14
Functions and Features of the water heater.................................. 15
Strength against corrosion ������������������������������������������������������������� 15
Strength against water pressure ���������������������������������������������������� 15
Eective Heat Isolation������������������������������������������������������������������ 15
Limiting Thermostat����������������������������������������������������������������������� 15
V Automated Switch���������������������������������������������������������������������� 15
Safety Valve������������������������������������������������������������������������������������� 15
Anti-freeze Safety (*)��������������������������������������������������������������������� 15
Dry Operation Safety(*)���������������������������������������������������������������� 15
Low Voltage Safety(*) ������������������������������������������������������������������� 15
Smart Cleaning System(*)������������������������������������������������������������� 16
Economy Mode ������������������������������������������������������������������������������ 16
Practical and Useful Information .................................................. 16
Suggestions for Operation............................................................ 17
Cleaning and Maintenance ........................................................... 17
Recommendations on Energy Saving ........................................... 17
Troubleshooting............................................................................. 18

4
Safety Warnings
Safety Information on
the Installation of the
Appliance
WARNING:Using voltage of
your water heater is  Volt.
WARNING: Make sure that
safety valve is installed on to the
cold water inlet. Safety valve has
been set during the manufac-
turing of the product. The set-
ting mechanism should not be
intervened. High pressure water
will flow from safety valve. This
is not a fault and is required ac-
cording to safety standard.
WARNING:The water heater
must absolutely be grounded. If
you use your water heater with-
out plug, absolutely run your
appliance after connecting to
grounded power line by means
of fuse; if you use your water
heater with plug, absolutely run
it by inserting into the grounded
plug. Manufacturing company
shall not be responsible for
any damage due to operating
without grounding.
WARNING:Do not operate
your water heater without mak-
ing sure that it is filled with full
of water. If water is flowing when
you open the hot water tap, it
means that the appliance is full
of water.
WARNING:When the water
heater will be mounted and op-
erated for the first time, ask an
authorized VOX
service for help.
WARNING:Avoid installing
the water heater in places where
there is a risk of freezing.
WARNING: Do not use elec-
tricity extension cables or multi-
pliers.
WARNING:This appliance
is not intended to be used by
those with physical, sensorial and
mental disability (including chil-
dren) or with lack of experience
and knowledge unless they are
given supervision and method
by a person, who is responsible
for the safety of the appliances,
about using the appliance.
WARNING: If the power ca-
ble is damaged, it should be re-
placed by the VOX authorized
service sta in order to avoid a
dangerous situation.
• Installation and repairs
should always be done by
Authorized Service.
• Producing company shall

5
not be held responsible of
any damage due to opera-
tions conducted by unau-
thorized persons.
WARNING: Your water heat-
er has been manufactured for
domestic use, and can be used
only at home and for specified
purposes. It is not suitable for
commercial or common usage.
WARNING: The water hotter
than °C during usage can
cause scalding or even death
due to serious scalding. Please
keep in mind that children, el-
derly and disabled people are
more vulnerable to the risk of
burning.
Safety Information on the
Use of the Appliance
WARNING:The limiting ther-
mostat will disable the resist-
ance in case of excessive tem-
peratures in the boiler or the
failure of temperature setting
thermostat.
WARNING:You can switch
ON and OFF the water heater
using the V-Automated switch.
V Automated Switch acts as a
fuse.
WARNING: Safety valve is in-
stalled on to the cold water in-
let of the water heater. This will
prevent the draining of the wa-
ter inside in case of a water cut.
CAUTION: The following
conditions must be observed
while installing and using the
safety valve.
• As water may drip from the
drainage tip, this pipe should
be left open to the atmos-
phere. In order to prevent
the dripping waters from
causing any harm to the
environment, you can con-
nect it to a sewage drain by
means of a hose.
• The appliance should be op-
erated with intervals in order
to prevent limescale accu-
mulation and confirm that it
is not blocked.
• While connecting the safety
valve to the appliance, make
sure that the drainage tip is
downwards.
• Operation of the appliance
for purposes other than
its intended purpose may
cause damage or danger-
ous conditions and renders
the warranty void. Damages
occurred due to these envi-

6
ronments are compensated
by the user.
• In order to prevent overload-
ing of the electrical circuit,
do not operate any other
high-power appliance on the
same circuit. Do not con-
nect with extension cables
or multi plugs. If you neglect,
it may cause electric shocks
and damages in the product.
• This appliance can be used
by children at the age of 
years old or above and by
those with physical, senso-
rial and mental disability or
with lack of experience and
knowledge, provided that
they are given supervision
and instruction about safely
use of the appliance and that
the hazards caused by the
appliance are understood by
them.
• Safety valve mains used in
the appliance may cause
leakage at the drainage sec-
tion if the water pressure ex-
ceeds  bars. This is normal.
When the pressure reduces,
the leakage will stop.
• As corrosion may be sped
up if the water inside the
appliance is discharged and
the appliance stays empty
for a long time, the reservoir
should not stay water-free
for a long time.
• Children should not be al-
lowed to play with the appli-
ance.
• Cleaning and user mainte-
nance should not be done
by unattended children.
• Packaging materials are dan-
gerous for children. Keep all
packaging materials out of
the reach of children.
• Before use, check the func-
tions of your appliance accu-
rately.
• The appliance should be
used only if it is plugged in
a power cable and it has no
visible damages on its body.
• Check the power cable for
damages regularly. Do not
strain the power cable of the
appliance. Do not put any
object on the power cable.
• If the power cable is dam-
aged, it should be replaced
by the authorized service
recommended by the pro-
ducer in order to avoid any
danger.

7
• In case that the mains op-
erating pressure exceeds
bars, a pressure reducer
should be connected to the
cold water line before safety
ventile. The pressure reduc-
er should be away from the
appliance and close to the
counter as much as possible.
Never use your appliance un-
der the following conditions:
• If the appliance or the power
cable is damaged,
• If the appliance does not
function properly,
• If the electrical components
of the appliance are visibly
damaged,
• If the appliance is wet, has
fallen into water or any oth-
er liquid, exposed to water
flooding incident, its electri-
cal components have come
into contact with water,
• If strange noises, smoke or
smell emanate from the ap-
pliance.
If any of the cases mentioned
above is detected, shut down
your appliance immediately,
disconnect the power supply
connection and contact with the
authorized service.
• A damaged appliance or
damaged parts of the appli-
ance may cause severe inju-
ries and fire.
• There is no parts within the
appliance, with which the
user can intervene. The risk
of electric shock occurs when
electrical connections within
the appliance are touched
and when the mechanical
structure of the appliance is
changed. In case of any fail-
ure, do not attempt to repair
it yourself. Otherwise, the
appliance shall be void of
warranty.
• Use of accessories not rec-
ommended by the producer
may cause injuries and dam-
ages in the appliance.
• Do not touch or run the ap-
pliance with wet and moist
hands.
• If the appliance will not be
used for a long time, discon-
nect the power supply from
the fuse.
Make sure that the appliance is
turned o and the power is cut
from the fuse/power switch at
the following conditions:

8
ommended to perform the
cleaning of the limescale
that may form on the resist-
ance due to the water hard-
ness and the high temper-
atures should be removed
in every two years regularly
by the Authorized Service.
This procedure should be
performed on heating resist-
ance.
• All above-mentioned proce-
dures should be performed
by VOX Authorized Ser-
vice.
• Hot water, ammoniac and
non-alcohol containing liq-
uid detergents should be
used. Otherwise the surface
may get damaged.
• Clean and maintain the
appliance as stated in the
"Cleaning and Mainte-
nance" section.
• Do not use chemicals. Do
not use substances such as
gasoline, thinner etc.
• Using powder detergent
may result in scratches on
the surface of the water
heater.
– Before installation,
– Before cleaning and
maintenance,
– Before repairs.
• Do not drink the water
drained o from the ap-
pliance. Otherwise, severe
health problems may occur.
• If the appliance will be re-
mounted at a new location,
contact with the authorized
service.
Safety Information to Take
into Consideration During
Cleaning and Maintenance
• To prevent risk of electric
shock, turn o the appliance,
shut down its fuse or switch
gear before cleaning.
• All maintenance and service
works should be performed
by the authorized VOX ser-
vices.
• Magnesium bar used against
the corrosion inside the
drum should be checked
every year and if it worn out,
it should be replaced by the
authorized service.
• To get the optimum per-
formance from your elec-
trical water heater, it is rec-

9
Safety Information to
Take into Consideration
During Handling and
Transportation
While handling the appliance,
make sure that all electrical con-
nections are removed and all
water inside is discharged. Place
or hold the appliance in a way
to avoid damaging during han-
dling.
Installation
WARNING:The water heat-
er should be installed by VOX
Authorized Service according
to “Installation Instructions”.
WARNING: The appliance
should not be mounted on the
stairs, exits and hallways of the
building.
Type C A fuse should be
used in the appliance.Your ap-
pliance is not suitable for being
used outside the building.
Choosing the Mounting
Position
• Do not install the appliance
in non-ventilated and humid
areas.
• Do not place the appliance
to areas that are under direct
sun light.
• Do not place the appliance
in areas where partially dan-
gerous substances such as
steam, dust or gas are pres-
ent.
• Do not connect the appli-
ance directly to the elec-
tricity sources which are not
protected from the sudden
voltage spike.
Liability Limitation
All technical information, in-
structions for use, operating and
maintenance of the appliance
included in this manual are the
most up to date information on
your appliance. Manufacturer
does not assume any responsi-
bility for damages and injuries
that may occur as a result of
non-compliance with the in-
structions given in this manual,
using the appliance for purpos-
es other than its intended use,
unauthorized repairs, unauthor-
ized modifications on the appli-
ance and using spare parts that
are not approved by the manu-
facturer.

10
Technical Specifications (Digital)
Model WHD 502 WHD 802
Capacity Lt.  
Water Temperature
Setting Range C  
Voltage V - -
Current A  
Resistance Power W  
The Highest Operating
Pressure of Safety Valve Bar  .,    .,  
Water Connection Inch  /
Smart Cleannig System √ √
Low Voltage Protection √ √
Freezing Control √ √
Dry Operation Safety √ √
Protection Class IP2 IP2
Anti-Corrosive System Enameled Interior Drum and Mag-
nesium Bar
Product Sizes mm Ø* Ø*
Technical specifications and this manual are subject to change without prior notification.
This appliance conforms to Regu-
lation on Supervision of the Waste
Electric and Electronic Appliances.
This product complies with the Europe CE Directives no. //
AT (Electromagnetic Compliance Regulation) and //AT (Low
Voltage (LVD) Regulation)

11
Technical Specifications (Analog)
Model WHM 351 WHM 502 WHM 802 WHM 1002 Capacity Lt.     Water Temperature Setting Range C     Voltage V  - - - Current A     Resistance Power W     The Highest Opera- ting Pressure of Safety Valve
Bar  .,    .,    .,    .,  
Water Connection Inch   / / Protection Class IP2 IP2 IP2 IP2 Anti-Corrosive System Enameled Interior Drum and Magnesium Bar Product Sizes mm Ø* Ø* Ø* Ø*
Technical specifications and this manual are subject to change without prior notification.
This appliance conforms to Regu- lation on Supervision of the Waste Electric and Electronic Appliances.
This product complies with the Europe CE Directives no. // AT (Electromagnetic Compliance Regulation) and //AT (Low Voltage (LVD) Regulation)

12
Min 50mm
Min 1100mm
Min 50mm
The distances specified in the chart below should be applied in the installation
of the appliance.
Electrical Connections
DISPLAY PCB
CN3 T
RL I
ACN
COM NO
BLUE
R
GRAY
BROWN
LT
BF
BROWN
BLUE
YELLOW/GREEN
L
NEUTRAL
GROUND
: CONNECTOR
: RELAY
: LI
: THERMI
: RESISTANCE
: BOILER FLANGE
MIT THERMOSTAT
STOR
C
RLI
LT
T
R
BF
FUSE
16A
CIRCUIT DIAGRAM CYLINDER DIGITAL ENGLISH
Digital Analog

13
General View (Digital)
Controls and Indicators
88


. Temperature/status indicators
. Hot water status LED
. Resistance LED
88
OFF




. ON/OFF and temperature set-
ting button
. Status indicators
The images are intended only to provide infor-
mation on the components of the appliance.
Components may dier according to the water
heater model. Pictures are representative.

14
2575
. ON/OFF and temperature setting
button
. Status indicators




. Temperature setting display
. Hot water status LED
. Resistance LED
General View (Analog)
Controls and Indicators

15
Functions and Features
of the water heater
The features marked with (*) works
with only digital models
Strength against corrosion
The inner drum of your water heater, in-
cluding the water input and output pipes
are enamel plated following the welding
operation are fully protected against cor-
rosion. The heater resistance is protected
against corrosion with Magnesium bar.
Strength against water
pressure
Water heater's inner drum is tested un-
der  bar pressure considering the water
mains pressure.
Eective Heat Isolation
The water heater is isolated using a
mm thick polyurethane heat isolation
material between the main body sheet
and the water drum. Thank to this ma-
terial the water in it will be heated rapidly
and cools down slowly.
Limiting Thermostat
The limiting thermostat will disable the
resistance in case of excessive tempera-
tures in the drum or the failure of tem-
perature setting thermostat.
V Automated Switch
You can switch ON and OFF the ther-
mostat using the V-Automated switch.
V- Automated Switch acts as a safety
device. It will disconnect the product
from the mains in case of an electrical
short circuit or the product is switched
OFF. The provided V-Automated
Switch should be installed by an author-
ized service technician only�
Safety Valve
Safety valve is installed on to the cold
water inlet of the water heater. A kind of
safety, this valve will prevent the draining
of the water inside in case of a water cut.
Also the same valve will discharge water
from the drain tip in case of overpressure
in the boiler.
Anti-freeze Safety (*)
When the water temperature inside the
water heater drop below ºC, the heat-
ing resistance is automatically activated
and heats the water up to ºC. AF sym-
bol will be displayed during anti freeze
system work. The anti-freeze safety sys-
tem activates while the water heater is
in stand-by. Install the water heater in a
location without risk of freezing.
Dry Operation Safety(*)
If the device is operated without water
due to any possible reason, the system
will intervene automatically and Eerror
code is displayed. In this case disconnect
the device using V-automated switch
and ensure that the water heater is filled
with water. After ensuring that it is filled
with water reconnect to the mains supply,
the water heater will commence its nor-
mal operation.
Low Voltage Safety(*)
If voltage is dropped to level harmful for
the device due to voltage fluctuations

16
then the low voltage safety system is
activated and Eis displayed. After the
voltage is restored to normal level Eer-
ror will be cleared and the water heater
will commence its normal operation.
Smart Cleaning System(*)
When the water is kept under below
ºC for a long time it will become suit-
able for bacteria growth. While the de-
vice in stand-by, to prevent bacteria from
growing the water is heated at least once
a week above ºC and kept at this level
for  hour. If the water heater is set man-
ually to ºC or higher, then this system
will automatically activates week later
following this last usage and automati-
cally heats the water above ºC.
Economy Mode
The water hotter than C during us-
age can cause scalding or even death
due to serious scalding. The temperature
which is most favorable for human health
and energy economy is about C.
This temperature is indicated on the
front panel of the product with a
icon. You can operate the product in an
economical way setting the temperature
setting knob to eco icon.
Operating
After your water heater is installed and
operationalized by the authorized ser-
vice, you can turn it on by pushing the
on/o button on the front panel.
• Ensure that the water heater is filled
with water before the initial use.
Switch on the V-Automated switch.
• During the initial operation the
temperature set will flash on the
display panel. After a short interval
the flashing will stop and the current
inner temperature will be displayed.
You can set the desired temperature
using the up and down arrows found
next to the display. After setting the
temperature resistance is activated
and the resistance indicator on the
left bottom becomes active.
• When the water temperature reach-
es the target temperature the re-
sistance will be deactivated and the
resistance indicator will flash and the
shower sign will be activated. In this
case the hot water is ready to use.
• When the temperature lowers to a
level  degrees below the set tem-
perature, the resistance will be acti-
vated again and the water is heated
to the target temperature.
Practical and Useful
Information
• The sediments and limescale ac-
cumulated at the below section of
the water heater will prevent direct
contact between the water and the
heating elements. Accumulation of
sediments and limescale at the bot-
tom of the water boiler should be
prevented. The water boiler should
be drained at regular intervals.
• Heat required amount of water in
your water heater. Install the water
heater away from the appliances
such as refrigerator and deep-freez-
er. Otherwise operation frequency
will increase.
• Ensure that isolation is installed to

17
prevent heat loss from the boiler and
installation.
• The water heater should be located
max.  m away from the points of
use. Installation on a farther location
will cause a drop at the eciency of
heat transfer. Also the water piping
should be isolated.
• When the device is not going to be
used for a prolonged time set the
thermostat to the lowest setting.
Suggestions for Operation
• Do not place items that are vulnera-
ble to water beneath the water heat-
er.
• Take below precautions if you will
not use the product for a prolonged
time.
- Disconnect the product from the
mains supply.
- Switch o the water valves and dis-
connect the water connection.
Cleaning and Mainte-
nance
Disconnect from the electrical mains
before handling any operation.
• Install a transparent drain hose to the
drain output of the safety valve lo-
cated at the cold water input of the
water heater at a location away from
freezing.
• Pressure will increase with the opera-
tion of the water heater. Dripping of
water at the safety valve is normal.
• Drain water from the boiler setting
the safety valve latch to upright po-
sition. To check the operation of the
safety valve, it is recommended to
set the latch to upright position once
a month to see if water flows out.
• If water is drained through safety
valve, do not operate until water
comes from the hot water tap.
• To get the optimum performance
from your electrical water heater, li-
mescale that my form on the resist-
ance due to the water hardness and
the high temperatures should be re-
moved regularly by the Authorized
Service.
Recommendations on
Energy Saving
• It is recommended to operate the
product in Eco mode (C) to ex-
tend the life of the product and save
energy.
• To get the best possible perfor-
mance from the product the heat-
ing element (resistance) should be
cleaned and the magnesium bar for
corrosion protection should be re-
placed once in every years. The
cleaning and replacement should be
performed by an authorized service.
• Anode and heater should be check
annually in regions with higher water
hardness.

18
Troubleshooting
PROBLEM REASON SOLUTION
Water heater is not
operating
Switch is o. Turn on the switch.
Power cut. Wait for the power to be back.
Building's main fuse is blown. Fix the fuse.
Water heater is not heat-
ing the water.
Water heater is not operating
correctly. Call the authorized service.
Water heater is heating
the water too late.
Voltage may be low. Use an appropriate voltage
regulator.
Limescale may be formed on
the resistance. Call the authorized service.
Noisy operation.
Limescale may be formed on
the resistance. Call the authorized service.
Limescale or sand can be
present.
within the safety valve.
Call the authorized service.
System pressure can be
distributed irregularly. Install a pressure regulator.
Water heater heats water
excessively (water steam
comes out).
There might be too much
limescale in the product. Call the authorized service.
Water drips from the
safety valve. This is normal.
Connect the provided hose
from the valve to water
drainage.
Digital models error messages
ERROR
MESSAGE REASON SOLUTION
E (E1) Thermistor Error Call the authorized service.
E (E2)Low Voltage Warning The error will be cleared after the voltage
becomes normal.
E (E3)Dry operation
After filling the boiler with water, discon-
nect and connect the power supply of the
product.
Before calling the service ensure that the failure is not related with a temporary elec-
trical black out or water cut.
In case you observe an abnormality in your appliance, you may try to solve the prob-
lem according to the instructions below. If your appliance does not still operate prop-
erly, contact the Call Center. You may access the authorized services list and contact
information from the web site.

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