Viessmann EM-EA1 extension Guide rapide

Installation and service instructions

for contractors

VIESMANN

EM-EA1 extension

DIO electronics module

Function extension

EM-EA1 extension

6131087 GB 6/2019 Please keep safe.

Please follow these safety instructions closely to

prevent accidents and material losses.

Safety instructions explained

Danger

This symbol warns against the risk of injury.

!Please note

This symbol warns against the risk of material

losses and environmental pollution.

Note

Details identified by the word "Note" contain additional

information.

Target group

These instructions are exclusively intended for quali-

fied contractors.

■Work on gas installations may only be carried out by

a registered gas fitter.

■Work on electrical equipment may 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.

Regulations to be observed

■National installation regulations

■Statutory regulations for the prevention of accidents

■Statutory regulations for environmental protection

■Codes of practice of the relevant trade associations

■Relevant country-specific safety regulations

Safety instructions for working on the system

Working on the system

■Where gas is used as the fuel, close the main gas

shut-off valve and safeguard it against unintentional

reopening.

■Isolate the system from the power supply, e.g. by

removing the separate fuse or by means of a mains

isolator, and check that it is no longer live.

■Safeguard the system against reconnection.

■Wear suitable personal protective equipment when

carrying out any work.

Danger

Hot surfaces and fluids can lead to burns or

scalding.

■Before maintenance and service work, switch

OFF the appliance and let it cool down.

■Never touch hot surfaces on the boiler, burner,

flue system or pipework.

!Please note

Electronic assemblies can be damaged by elec-

trostatic discharge.

Prior to commencing work, touch earthed

objects such as heating or water pipes to dis-

charge static loads.

Repair work

!Please note

Repairing components that fulfil a safety func-

tion can compromise the safe operation of the

system.

Replace faulty components only with genuine

Viessmann spare parts.

Auxiliary components, spare and wearing parts

!Please note

Spare and wearing parts that have not been tes-

ted together with the system can compromise its

function. Installing non-authorised components

and making non-approved modifications or con-

versions can compromise safety and may inva-

lidate our warranty.

For replacements, use only original spare parts

supplied or approved by Viessmann.

Safety instructions

6131087

Safety instructions for operating the system

If you smell gas

Danger

Escaping gas can lead to explosions which may

result in serious injury.

■Do not smoke. Prevent naked flames and

sparks. Never switch lights or electrical appli-

ances on or off.

■Close the gas shut-off valve.

■Open windows and doors.

■Evacuate any people from the danger zone.

■Notify your gas or electricity supply utility from

outside the building.

■Have the power supply to the building shut off

from a safe place (outside the building).

If you smell flue gas

Danger

Flue gas can lead to life threatening poisoning.

■Shut down the heating system.

■Ventilate the installation site.

■Close doors to living spaces to prevent flue

gases from spreading.

What to do if water escapes from the appliance

Danger

If water escapes from the appliance there is a

risk of electrocution.

Switch OFF the heating system at the external

isolator (e.g. fuse box, domestic distribution

board).

Danger

If water escapes from the appliance there is a

risk of scalding.

Never touch hot heating water.

Condensate

Danger

Contact with condensate can be harmful to

health.

Never let condensate touch your skin or eyes

and do not swallow it.

Flue systems and combustion air

Ensure that flue systems are clear and cannot be

sealed, for instance due to accumulation of conden-

sate or other external causes.

Ensure an adequate supply of combustion air.

Inform system users that subsequent modifications to

the building characteristics are not permissible (e.g.

cable/pipework routing, cladding or partitions).

Danger

Leaking or blocked flue systems, or an inade-

quate supply of combustion air can cause life

threatening poisoning from carbon monoxide in

the flue gas.

Ensure the flue system is in good working order.

Vents for supplying combustion air must be non-

sealable.

Extractors

Operating appliances that exhaust air to the outside

(extractor hoods, extractors, air conditioning units, etc.)

can create negative pressure. If the boiler is operated

at the same time, this can lead to a reverse flow of flue

gas.

Danger

The simultaneous operation of the boiler and

appliances that exhausts air to the outside can

result in life threatening poisoning due to a

reverse flow of flue gas.

Fit an interlock circuit or take suitable steps to

ensure an adequate supply of combustion air.

Safety instructions

Safety instructions (cont.)

6131087

1. Information Disposal of packaging ............................................................................ 5

Symbols ................................................................................................. 5

Intended use .......................................................................................... 5

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

■System examples ............................................................................... 6

■Spare parts lists .................................................................................. 6

2. Installation sequence Wall mounting ........................................................................................ 7

Overview of electrical connections ........................................................ 7

Electrical connections ............................................................................ 8

Connecting external functions ............................................................... 8

■Connecting external default set flow temperature: 0 - 10 V IN ........... 8

■Connecting an external default output: 0 - 10 V IN ............................. 9

■Connecting the operating mode changeover: DI1 to DI3 ................... 10

■Connecting external demand: fD ....................................................... 10

■Connecting external blocking: fD ....................................................... 11

Connecting the fault message input and fault message output ............. 11

■Connection without system blocking via 230 V fault message input:

fD ....................................................................................................... 11

■Connection with system blocking via 230 V fault message input: fD . 12

■Connection with system blocking via 24 V fault message input: DI1 .. 12

■Connecting only message facility: hH ................................................. 13

Connecting the external LPG valve: fD ................................................. 13

Connecting the external extractor interlock: hH ..................................... 13

Connecting the PlusBus to the heat generator ...................................... 14

Power supply ......................................................................................... 14

■Power supply at heat generator .......................................................... 14

■Separate power supply ....................................................................... 14

3. Commissioning and

adjustment

Rotary switch S1 for subscriber number addressing ............................. 17

Configuring functions ............................................................................. 17

4. Connection and wiring dia-

gram

................................................................................................................ 18

5. Specification ................................................................................................................ 19

6. Disposal Final decommissioning and disposal ..................................................... 20

7. Declaration of Conformity Declaration of conformity ....................................................................... 21

Index

6131087

Please dispose of packaging waste in line with statu-

tory regulations.

Symbols

Symbol Meaning

Reference to other document containing

further information

Step in a diagram:

The numbers correspond to the order in

which the steps are carried out.

Warning of material losses and environ-

mental pollution

Live electrical area

Pay particular attention.

■Component must audibly click into place.

■Acoustic signal

■Fit new component.

■In conjunction with a tool: Clean the sur-

face.

Dispose of component correctly.

Dispose of component at a suitable collec-

tion point. Do not dispose of component in

domestic waste.

Intended use

The appliance is only intended to be installed and

operated in sealed unvented heating systems that

comply with EN 12828, with due attention paid to the

associated installation, service and operating instruc-

tions as well as the details in the datasheet.

It is only designed for the heating up of heating water.

Commercial or industrial usage for a purpose other

than the heating up of heating water shall be deemed

inappropriate.

Intended use presupposes that a fixed installation in

conjunction with permissible components designed for

this purpose has been carried out.

Every other use will be deemed to be inappropriate.

Any resulting losses are excluded from the manufac-

turer's liability.

Any usage beyond this must be approved by the man-

ufacturer for the individual case.

Intended use also includes the adherence to mainte-

nance and inspection intervals.

Information

Disposal of packaging

6131087

Information

Maximum 3 EM-EA1 function extensions can be con-

nected to one heat generator.

Only one function can be connected to each EM-EA1

function extension (DIO electronics module).

The functions that can be connected depend on the

settings made at the heat generator.

Heat generator installation and service instruc-

tions

System examples

Available system examples: See www.viessmann-

schemes.com.

Spare parts lists

Information about spare parts can be found on the

Viessmann spare parts app.

Information

Product information

6131087

Information

Fig. 1

Overview of electrical connections

jF jF [{][{][{] hH [{] fÖ

1234123456121212?

1??

+-+-

Fig. 2

DI1 Digital input 1

DI2 Digital input 2

DI3 Digital input 3

0 - 10 V IN 0 - 10 V input

0 - 10 V OUT 0 - 10 V output

F4 Fuse 2 A (slow)

PWM1 Control voltage output

S1 Rotary switch for subscriber number

addressing

Z1 fD 230 V relay output, 230 V input

fÖ Power supply

fÖ A Power supply for additional accessories

hH Changeover contact (floating switching

contact) for connecting signalling equip-

ment for fault messages or an extractor

hood

jF PlusBus

Installation sequence

Wall mounting

6131087

Installation

Function Page Connections:

DI1 DI2 DI3 PWM1 0 - 10 V hH fD

IN OUT 43-1 43-L

External functions

■External default set flow temperature 8 X X

■External default output 9 X X

■Operating mode changeover 10 X X X

■External demand 10 X

■External blocking 11 X

Fault message input and fault mes-

sage output

■Connection without system blocking 11 X X

■Connection with system blocking,

230 V

12 X X

■Connection with system blocking,

24 V

13 X X

■Connecting only message facility (e.g.

buzzer)

13 X

External LPG valve 13 X

External extractor interlock 13 X

Electrical connections

!Please note

Electronic assemblies can be damaged by elec-

trostatic discharge.

Prior to commencing any work, touch earthed

objects such as heating or water pipes to dis-

charge static loads.

■Apply strain relief to on-site cables.

■Seal any unnecessary apertures with cable grom-

mets (not cut open).

Danger

Incorrect wiring can lead to serious injury from

electrical current and result in appliance dam-

age.

Take the following measures to prevent wires

drifting into the adjacent voltage area:

■Route extra low voltage (ELV) leads < 42 V

separately from cables > 42 V/230 V~/400 V~.

Secure with cable ties.

■Strip as little of the insulation as possible,

directly before the terminals. Bundle the

cables close to the corresponding terminals.

■If 2 components are connected to the same

terminal, press both cores together in a single

wire ferrule.

■When connecting external switching contacts

and on-site components, observe the insula-

tion requirements of IEC/EN 60335-1.

Connecting external functions

Connecting external default set flow temperature: 0 - 10 V IN

Analogue input for connecting the external default set

flow temperature or the external default output

Installation sequence

Overview of electrical connections (cont.)

6131087

Installation

hH [{] fÖ

1212?

1??

+-+-

+AB

Fig. 3

AEnable signal

BJunction box

When making the connection, ensure correct polarity

of the DC control voltage 0 - 10 V.

Note

No galvanic separation is required between the earth

conductor and the negative pole of the on-site power

source.

The 0 to 10 V hook-up generates the following set flow

temperatures:

< 1 V No default set flow temperature

1 V ≙ 10 °C

10 V ≙ 100 °C or max. set flow temperature in

accordance with factory-set limit for heat gener-

ator

If 230 V voltage is present at digital input 43-1, the

external default set flow temperature is enabled.

Connecting an external default output: 0 - 10 V IN

Analogue input for connecting the external default set

flow temperature or the external default output

hH [{] fÖ

1212?

1??

+-+-

+AB

Fig. 4

AEnable signal

BJunction box

When making the connection, ensure correct polarity

of the DC control voltage 0 - 10 V.

Note

No galvanic separation is required between the earth

conductor and the negative pole of the on-site power

source.

The 0 to 10 V hook-up generates the following default

output for the heat generator:

< 1 V ≙ 0 %

1 V ≙ 10 % or lower modulation limit

10 V ≙ 100 %

If 230 V voltage is present at digital input 43-1, the

external default output is enabled.

Installation sequence

Connecting external functions (cont.)

6131087

Installation

Connecting the operating mode changeover: DI1 to DI3

jF jF [{][{][{]

DI1 DI2 DI3

1234123456

Fig. 5

■External contacts at DI1, DI2 and DI3 must be poten-

tial-free.

■When making the connection, adhere to the require-

ments of protection class II. That is 5.0 mm air and

creep paths and 2.0 mm insulation thickness against

'live' components.

Weather-compensated operation

As soon as the contact closes, the following demand

becomes active:

■Demand for all installed heating circuits simultane-

ously, with the respective programmed set room tem-

perature of the individual heating circuit:

DI1 Reduced room temperature

DI2 Standard room temperature

DI3 Comfort temperature

Continuous operation or room temperature-

dependent operation

As soon as the contact closes, the following demands

become active:

■Set flow temperature demand for the system

■Demand for all installed heating circuits simultane-

ously, at the respective programmed temperature

level of the individual heating circuit:

DI1 Reduced flow temperature

DI2 Standard flow temperature

DI3 Comfort flow temperature

(Only with continuous operation)

Connecting external demand: fD

? ?

fÖf-]

A B

Fig. 6

ASignal for external demand or external blocking

BJunction box

The demand is active if 230 V voltage is present at dig-

ital input 43-1. A demand is issued to the heat genera-

tor.

The set values for the flow temperature and the speed

of the primary pump are specified with parameters

528.0 and 1100.2.

Installation sequence

Connecting external functions (cont.)

6131087

Installation

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