Viessmann Vitotherm ES4.A10 K Kurzanleitung

Please retain for future use

Installation and service

instructions

for contractors

6167238 GB 11/2020

Vitotherm ES4

Version ES4.A10 K

Version ES4.A10 OK

Version ES4.A10 OTK

Electric water heater

VITOTHERM ES4

6167238 GB

Danger

This symbol warns against the

risk of injury.

These instructions are exclusively

intended for qualified contractors.

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

■National installation regulations

■Statutory regulations for the

prevention of accidents

■Statutory regulations for

environmental protection

■Codes of practice of the relevant trade

associations

Regulations to be observed

■Work on electrical equipment must

only be carried out by a qualified

electrician.

■The system must be commissioned

by the system installer or a qualified

person authorised by the installer.

■Relevant safety regulations

■Requirements stipulated by the local

power supply utility

■Requirements stipulated by the local

water company

Before installing, 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.

6167238 GB

For your safety (cont.)

Installation work

Safety instructions

Danger

Contact with live components can

result in severe injuries. Some

components remain live even after

the power supply has been

switched off. Wait at least 4 minutes

for the voltage to discharge before

removing the appliance covers.

Safety instructions for working on the appliance

Danger

Hot surfaces and fluids can cause

burns.

■Switch off the appliance and

allow it to cool down before

carrying out any maintenance

work.

■Do not touch hot surfaces on the

appliance, fittings or pipes.

■Switch off the power supply, e.g. at

the separate fuse or a mains isolator.

■Safeguard the power supply against

reconnection.

■ Check that it is no longer live.

■Do not make any modifications to the

water or electrical installations.

■Do not make any structural

modifications to the appliance.

Maintenance work

■Only install the appliance on a

suitably stable wall with the fixing

materials provided.

■Do not make any structural

modifications to the appliance.

■Install an isolator in the power cable

to provide omnipolar separation from

the mains for all active conductors,

corresponding to overvoltage

category III (3 mm) for full isolation.

The isolator must be fitted in the

permanent electrical installation, in

line with installation requirements.

We also recommend installing an

RCD (Class A) for pulsating DC (fault)

currents.

■The appliance must be connected to

the power supply via a dedicated fixed

socket. The power cable and fuse

must be sized appropriate to the

output of the appliance.

■This appliance of protection class I

must be permanently connected to

the earth conductor.

■Provide protection against contact

with live parts. Install covers.

6167238 GB

Caution

Repairing components that fulfil

a safety function can compromise

the safe operation of the appliance.

Replace faulty components only

with genuine Viessmann spare

parts.

Repair work Auxiliary components, spare parts

and wearing parts

Caution

Spare parts and wearing parts that

have not been tested together with

the appliance can compromise its

function.

Installing non-authorised

components and making

non-approved modifications or

conversions can compromise safety

and may invalidate our warranty.

■For replacements, only use

original Viessmann parts or spare

parts approved by Viessmann.

■For appliances with a power

cable, use only original

Viessmann spare parts.

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 by means

of a mains isolator.

■Close the cold water supply

shut-off valve.

Safety instructions for operating the device

If water escapes from the appliance

Danger

If water escapes from the

appliance, there is a risk of

scalding.

Never touch hot water.

■Only operate the appliance after it has

been properly installed on the wall.

■ Comply with the permissible operating

data, as specified on the type plate.

Operation of the appliance

6167238 GB

Table of contents

1. Information Disposal of packaging .....................................................................6

Intended use....................................................................................6

Product information .........................................................................6

2. Installation

sequence

Installation .......................................................................................7

■

Connection to the water system

..................................................... 7

■

Installation with safety valve for pressure-tested installation

....... 8

Wiring diagram ................................................................................9

Electrical installation........................................................................9

3. Maintenance Operation.......................................................................................10

■Switching on...............................................................................10

■Temperature control ...................................................................10

■Venting ....................................................................................... 11

■Faults.......................................................................................... 11

Removing the cover.......................................................................12

List of spare parts..........................................................................13

4. Appendix Specification ..................................................................................14

Table of contents

6167238 GB

Disposal of packaging

Information

Please dispose of packaging waste in line

with statutory regulations.

Intended use

Product information

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 11 min

for 10 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.A10 OK and ES4.A10 OTK:

Appliances for installation above a washbasin

with water connections pointing vertically

downwards.

Type ES4.A10 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.

6167238 GB

Installation

Installation sequence

Type ES4.A10 OTK:

■

Install only with water connections

pointing vertically downwards.

■

Only connect the fitting that has been

supplied with this appliance.

■

A pressure reducer and safety valve are

not required as the appliance is only

operated as a non-pressurised system.

Fastening with rawl plugs:

1. Insert two 8 mm diameter rawl plugs into

the wall 140 mm apart

2. Screw in the fixing screws until the

clearance between the screw head and

the wall is no more than 4 mm.

3. Hang the electric water heater on the

screws.

Fastening with wall mounting bracket:

1. Fit the wall mounting bracket.

2. Hang the electric water heater on the wall

mounting bracket and secure it in place

with the fixing screws.

For type ES4.A10 OTK, a clearance must

be maintained between the fixing screws

and the fitting.

Connection to the water system

Shutting off the cold water supply will cause

the appliance to malfunction.

Non-pressurised installation:

• Fit the hot water tap over a basin with

a drain.

• Do not install any devices between the hot

water outlet of the appliance and the

water outlet of the fitting which could

inhibit the flow. A free outflow of water

must be guaranteed at all times.

Pressurised installation:

• For system water pressures above

0.6 MPa, a pressure reducing valve must

be installed upstream of the safety valve

on the cold water supply.

• Connect the safety valve to a drain line.

• The safety valve and the outlet line must

not be installed in rooms where

temperatures below 0 °C occur.

• Do not install a shut-off valve between the

safety valve and the electric water heater.

Fit the appliance to a stable wall in a vertical

position. Connections are at the top or bottom,

depending on the type.

6167238 GB

Installation sequence

1. Prepare the cold water supply according

to local regulations and connect to the

appliance:

Types ES4.A10 OK and ES4.A10 K:

Connect the cold water pipe to the inlet

connector and the DHW outlet to the

outlet connector: See adjacent diagrams.

It is essential that a safety valve [6] with

a nominal pressure of 0.6 MPa is installed

in the cold water supply.

Type ES4.A10 OTK:

Insert gaskets into the nuts and connect

the fitting to the appliance using metal

pipes or flexible hoses. Recommended

distance between metal pipes and wall:

~34 mm.

2. Route the drain line for the safety valve

downwards, ensuring it is located in

a frost-free environment.

3. Open the hot water tap (red) and fill the

integral cylinder completely with water

(water must run out of the hot water tap

free of bubbles).

4. Check connections for tightness.

Installation with safety valve for pressure-tested installation

3 Inlet connector (cold water)

4 Outlet connector (DHW)

5 DHW outlet

6 Safety valve

7 Pressure reducing valve (for system

water pressures above 0.6 MPa)

8 Shut-off valve

9 Cold water supply

Type ES4.A10 OK must be installed with

connections pointing vertically downwards.

Type ES4.A10 K must be installed with

connections pointing vertically upwards.

6167238 GB

Installation sequence

Wiring diagram

ZG – Heating module

F1 – Thermal circuit breaker

T1 – Thermostat

X1 – Terminal strip

XP – Power cable

H1 – Heating display

A1 – Indicator PW.31

Electrical installation

6167238 GB

Maintenance

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

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 in

pressurised water systems.

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.A10 OK and

ES4.A10 OTK):

Undo the connection pipe from the

inlet connector (cold water). Open

the hot water tap.

■ Appliances installed under the

washbasin (type ES4.A10 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

"III"(~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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