Viessmann Vitotherm ES4 User manual

Please retain for future use
Operating instructions
for system users
6167225 GB 11/2020
Vitotherm ES4
Version ES4.A5 K
Version ES4.A5 OK
Version ES4.A5 OTK
Electric water heater
VITOTHERM ES4

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Danger
This symbol warns against the
risk of injury.
The appliance can be operated by
children aged 3 and older, as well as by
individuals with reduced physical,
sensory or mental faculties or those
lacking in experience and knowledge,
provided such individuals are supervised
or have been instructed in the safe use
of this appliance and any risks arising
from it.
Caution
Supervise children in the proximity
of the appliance.
■ Never permit children to play
with the appliance.
■ Cleaning and user maintenance
must never be carried out by
unsupervised children.
Caution
This symbol warns against the
risk of material losses and
environmental pollution.
Note
Details identified by the word "Note"
contain additional information.
Safety instructions explained
Target group
For your safety
Safety instructions
Safety instructions for working on the appliance
■The appliance may only be connected
and commissioned by authorised
contractors.
■Observe the specified electrical
connection requirements.
■Modifications to the existing
installation may only be carried out by
authorised contractors.
■The appliance must be earthed.
These instructions are intended for
users of the appliance
Before commissioning and operating the appliance, please read the documents
enclosed with the appliance.
Follow the safety instructions closely to prevent hazards, injury and material
losses.
Store the supplied documents in a safe place.
Connecting the appliance

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Safety instructions for operating the device
Danger
Hot surfaces can cause burns.
■ Do not open the appliance.
■ Do not touch the hot surfaces of
uninsulated pipes and fittings.
Auxiliary components, spare parts
and wearing parts
Caution
Components that were not tested
with the appliance may damage the
appliance or affect its function.
Have all installation or replacement
work carried out exclusively by
heating contractors.
Danger
Damaged equipment poses a
safety hazard.
Check the appliance for external
damage.
Never start up a damaged
appliance.
For your safety (cont.)
Safety instructions
■ All settings and work on the appliance
must be performed as specified in
these operating instructions.
Further work on the appliance may be
carried out only by authorised
contractors.
■ Do not open the appliance.
■ Do not remove its casings.
■ Do not modify or remove any
attached parts or installed
accessories.
■ Do not open or retighten any pipe
connections.
Working on the appliance Cleaning the appliance
■ Clean the exterior of the appliance
with a commercially available
domestic cleaning agent.
Do not use scouring agents,
solvent-based cleaners or steam
cleaners.
■ Regular maintenance ensures
trouble-free, energy efficient,
environmentally responsible and safe
operation.
Have the appliance tested and
serviced by an authorised contractor
at least every 3 years.
Danger
Incorrectly executed work on the
appliance can lead to life
threatening accidents.
Work on electrical equipment may
only be carried out by a qualified
electrician.

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For your safety
Safety instructions
■ For showers, the DHW temperature
must not exceed 55 °C.
If necessary, have safety equipment
installed to prevent scalding.
■ Temperatures above approx. 43 °C
can cause a burning sensation,
particularly in children.
■ The fittings will also become hot after
an extended runtime.
■ In the case of appliances for
reheating, the water running into the
appliance may already be hotter than
the required temperature.
Consequently the water may be too
hot when it is drawn off.
■ To prevent it from overheating, do not
cover the appliance.
■ At all times comply with the operating
conditions specified on the type plate.
Operation of the appliance
■ Ensure that the water can flow freely
from the water outlet.
■ Do not install any fittings or
appliances that will obstruct the free
flow of water from the water outlet.
■ Regularly descale the water outlets at
the draw-off points, e.g. shower head,
aerator, taps.
■ Use only fittings, aerators and shower
heads that have been recommended
by the manufacturer.
Operating appliances in
non-pressurised installations
Caution
Incorrect ambient conditions may
damage the appliance and put safe
operation at risk.
■ Ensure ambient temperatures
above 0 °C.
■ Avoid air contamination through
halogenated hydrocarbons
(e.g. as contained in paints,
solvents and cleaning agents).
Avoid excessive dust, e.g.
through grinding/polishing work.
■ Avoid constant high humidity
levels (e.g. through continuous
drying of laundry).
Installation room requirements
Danger
Easily flammable liquids and
materials (e.g. naphtha/petrol,
solvents, cleaning agents, paints or
paper) can trigger deflagration and
fire.
Never store or use such materials
in the installation room or in the
immediate vicinity of the appliance.

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For your safety (cont.)
Safety instructions
Danger
If there are leaks in the appliance,
there is a risk of electric shock.
■Isolate the appliance from the
power supply, e.g. at the
separate fuse or a mains isolator.
■Close the water supply pipe.
■Notify your heating contractor.
If water escapes from the appliance
Danger
If water escapes from the
appliance, there is a risk of
scalding.
Do not touch the hot water.
Faults on the appliance
■Isolate the appliance from the power
supply, e.g. at the separate fuse or
a mains isolator.
■ Close the shut-off valve of the cold
water supply.
■Notify your heating contractor.

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Product information
Operating instructions
Intended use
The appliance is used for the heating of
domestic hot water and can supply one or
more draw-off points as applicable.
The appliance is intended for domestic use.
It can be operated safely by untrained
persons. The appliance can also be used in
a non-domestic environment, e.g. in a small
business, as long as it is used in the same
way.
Any use that differs from or goes beyond this
is considered inappropriate.
Intended use also extends to compliance with
these instructions and with the instructions for
any accessories used.
Electric water heater for pressurised or
non-pressurised installation.
Max. water pressure in system: 0.6 MPa
■Corrosion-resistant stainless steel
cylinder
Anode does not need to be replaced on
a regular basis.
■Efficient heating module
Output: 2000 W
DHW heating from 10 to 40 °C in 5.5 min
for 5 l.
■ Energy efficiency class A
Very low energy loss.
■ Functional temperature control
Water temperature can be variably
adjusted between 23 and 70 °C
Types of installation
Types ES4.A5 OK and ES4.A5 OTK:
Appliances for installation above a washbasin
with water connections pointing vertically
downwards.
Type ES4.A5 K:
Appliances for installation below a washbasin
with water connections pointing vertically
upwards.
Note:
In a pressurised installation, water may
occasionally escape from the safety valve.
In a non-pressurised installation, water may
occasionally escape from the hot water
draw-off point.
This is not a malfunction.
Any water that occasionally escapes must be
able to drain away freely at all times.

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Operating instructions
Operation
Switching on
Caution
The appliance may be damaged if it is
switched on before it is completely filled.
Do not switch on the appliance until the
integral cylinder is completely filled with
water.
Draining
Caution
In a pressure-tested installation, the
appliance may be damaged if the safety
valve is not functioning correctly.
■ Open the safety valve regularly and
remove any deposits.
■ Check the safety valve regularly for
blockages and correct operation:
Turn the lever of the safety valve so
that water flows out of the outlet
pipe. If no water comes out of the
outlet pipe, the valve is faulty and the
appliance must not be operated.
Caution
The appliance may be damaged if
operated in areas at risk from frost.
If there is a risk of frost, drain the
appliance completely:
■ Appliances installed above
washbasins (types ES4.A5 OK and
ES4.A5 OTK):
Undo the connection pipe from the
inlet connector (cold water). Open
the hot water tap.
■ Appliances installed under the
washbasin (type ES4.A5 K):
Undo flexible hoses from inlet and
outlet connectors (hot and cold
water). Unhook the appliance at the
wall and turn it 180° to drain it.
Temperature control
A rotary switch for adjusting the temperature
is located on the front of the appliance.
■ Switching on:
Turn the temperature switch clockwise.
The water temperature can be variably
adjusted between " " (~7 °C) and "○○○"
(~70 °C). In heating mode, the LED
illuminates and the water is heated.
■ Switching off:
Turn the temperature switch anticlockwise.
Position when appliance is switched off:
See adjacent diagram.

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Operation (cont.)
Operating instructions
Faults
Venting
Caution
Air in the water installation may damage
the appliance.
Vent the system after working on the
appliance or the water installation.
1. Switch off the power supply, e.g. at the
separate fuse or a mains isolator.
2. Open and close the hot water tap several
times to vent the water installation until a
constant, even flow of water is achieved.
3. Turn the rotary switch to the required
temperature.
4. Switch on the power supply.
No. Fault Background Remedy
1.
The appliance is not
heating the water
and the LED is not
illuminated.
Power supply fault. Check the fuses.
Fault with the rotary
temperature switch.
Replace the rotary
temperature switch.
(Heating contractor)
2.
The appliance is not
heating the water and
the LED is illuminated.
Fault with the heating
module.
Replace the appliance.
(Heating contractor)
Fault with the temperature
limiter.
Switch on the temperature
limiter or replace it.
(Heating contractor)
3.
The appliance is heating
the water and the LED is
not illuminated.
Fault with the LED. Replace the LED.
(Heating contractor)
Operation (cont.)

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Operating instructions
Specification
VITOTHERM DHW cylinder ES4.A5 K ES4.A.5 OK ES4.A.5 OTK
Contents l 5
Voltage 220 - 240 V~
Rated output W 2000
Rated current A 8.3 - 9.1
Temperature range °C 23 - 70
Pressure resistance MPa 0.6
Dimensions (height x width x depth) mm 427 x 285 x 163
Weight
(dry) kg 4.4
IP rating IP 24
Water connection (male thread) G 1/2"
Water connection (mixer tap) - - G 1/2"

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