Viessmann EM-EA1 extension Betriebsanleitung

6020379 GB 6/2018

Installation and service instructions

for contractors

VIESMANN

EM-EA1 extension

Function extension

Safety instructions

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.

Installation, initial start-up, inspection, maintenance

and repairs must only be carried out by a competent

person (heating engineer/installation contractor).

Before working on the equipment/heating system, iso-

late the power supply (e.g. by removing a separate

mains fuse or by means of a mains isolator) and safe-

guard against unauthorised reconnection.

When using gas as fuel, also close the main gas shut-

off valve and safeguard against unauthorised reopen-

ing.

Repairing components which fulfil a safety function can

compromise the safe operation of your heating system.

For replacements, use only original spare parts sup-

plied or approved by Viessmann.

Application information

The functions that can be connected depend on the

settings made at the heat generator. See the service

instructions for the heat generator and/or control unit.

Only one function can be connected to each EM-EA1

extension.

Up to max. 3 EM-EA1 extensions can be connected to

a heat generator.

Fig. 1

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

PWM1 Control voltage output

S1 Rotary switch for codes

Z1 fD 230 V relay output with 230 V input

fÖ Power supply

fÖ A Power supply for additional accessories

hH Connection for fault message signalling

equipment (floating switching contact)

jF PlusBus

Mounting on the wall

6020379

Function Connections

DI1 DI2 DI3 PWM1 0 - 10 V

0 - 10 V

OUT

66 Z1-1

230 V

Z1-L

OUT

230 V

Flue gas damper

Output Z1-L opens flue gas damp-

er. Feedback contact from Z1-1

comes back from flue gas damper.

Burner control unit is enabled.

X X

230 V fault message input and

fault message output (potential-

free) without system blocking

Fault message input: If digital in-

put contact across Z1-L and Z1-1

is closed, fault message active.

Fault message output 66 active.

X X X

External safety valve LPG

Output Z1-L is active if burner

control unit opens the external

safety valve.

Operating mode changeover

Demand to all available heating

circuits as long as contact remains

closed. With set room tempera-

ture:

DI1 Reduced room temperature

DI2 Standard room temperature

DI3 Comfort room temperature

X X X

External demand, DHW circula-

tion pump

If input Z1-1 – Z1-L is closed, the

DHW circulation pump starts.

X X

Fault message input 24 V and

system blocking

If contact DI1 is closed, the burner

control unit is blocked. Output 66

is switched over. Fault message F.

104 appears.

X X

External safety valve LPG with

feedback

Output Z1-L is active if burner

control unit opens the external

safety valve. If feedback is re-

ceived from Z1-1 that the valve is

open, the burner control unit is en-

abled.

X X

Fault message input 230 V and

system blocking

If contact Z1-1 – Z1-L is closed,

the burner control unit is blocked.

Output 66 is switched over. Fault

message F.104 appears.

X X X

Electrical connections (cont.)

6020379

Function Connections

DI1 DI2 DI3 PWM1 0 - 10 V

0 - 10 V

OUT

66 Z1-1

230 V

Z1-L

OUT

230 V

External demand (digital)

If contact Z1-1 – Z1-L is closed, a

demand is sent to the heat gener-

ator according to an adjustable set

flow temperature (parameter

528.0).

X X

External blocking

If contact Z1-1 – Z1-L is closed,

the heat generator is blocked.

X X

!Please note

Electronic assemblies can be damaged by static

loads.

Before beginning work, touch an earthed object

such as heating or water pipes to discharge any

static.

Note

Apply strain relief to on-site cables.

Secure individual wires directly to each plug using

cable ties.

Blank off unnecessary knockouts with cable grommets

(not cut out).

Connect fault message facility to output hH

? ?

fÖf-]

hH Z1

Fig. 3

Rated current max. 1 A~

Connecting a floating switching contact to digital inputs DI1 to DI3

jF jF [{][{][{]

DI1 DI2 DI3

1234123456

Fig. 4

Electrical connections (cont.)

6020379

[{] fÖ

1??

Fig. 5

[{] fÖ

1??

Fig. 6

Rotary switch S1

Fig. 7

Set rotary switch S1 to a consecutive number as

shown in the example below:

■1st extension EM-EA1: Rotary switch to 1

■2nd extension EM-EA1: Rotary switch to 2

■3rd extension EM-EA1: Rotary switch to 3

Note

These settings are independent of the settings made

at other extensions, such as EM-MX (mixer). If an EM-

EA1 extension is set to 1, an EM-MX extension can

also be set to 1.

Configuring functions

Configure the settings of the connected function during

commissioning using the heat generator's commission-

ing assistant.

Heat generator installation and service instruc-

tions

Connections at plug Z1

6020379

1 2

jF jF [{][{][{]

DI1 DI2 DI3

1234123456

Fig. 8

AExtension

BPlusBus to heat generator

Note

If making the connection to the heat generator with an

external plug for the bus connection, disconnect plug

jF and connect the wires directly.

Heat generator installation and service instruc-

tions

Power supply

Power supply at the heat generator control unit

L?NL

156

Fig. 9

AExtension

fÖ Power supply

fÖAPower supply for further accessories

aBH Plug for power supply to accessories in the heat

generator control unit

Create the power supply connection.

Route the power cable to the heat generator control

unit and connect to plug aBH.

If power is supplied to a further accessory, use plug

fÖA provided

Heat generator installation and service instruc-

tions

Danger

Incorrect core assignment can result in serious

injury and damage to the appliance.

Take care not to interchange wires "L1" and "N".

Separate power supply

If the power supply for the extension is not made at

the heat generator control unit.

Danger

Incorrect electrical installations can lead to seri-

ous injury from electrical current and result in

appliance damage.

Connect the power supply and implement all

safety measures (e.g. RCD circuit) in accord-

ance with the following regulations:

■IEC 60364-4-41

■VDE regulations

■Technical connection requirements (TAB)

specified by the local grid operator

Connecting the PlusBus to the heat generator control unit

6020379

Danger

The absence of system component earthing can

lead to serious injury from electric current if an

electrical fault occurs.

The appliance and pipework must be connected

to the equipotential bonding of the building.

Isolators for non-earthed conductors

■The mains isolator (if installed) must simultaneously

isolate all non-earthed conductors from the mains

with a minimum contact separation of 3 mm.

■If no mains isolator is installed, all non-earthed con-

ductors must be isolated from the power supply by

the upstream circuit breaker with a minimum contact

separation of 3 mm.

Fig. 10

APower supply for extension

BPower supply for heat generator control unit

CPower supply 1/N/PE, 230 V/50 Hz

DFuse (max. 16 A)

EMains isolator, 2-pole, on site

FJunction box (on site)

Connect the power supply in accordance with the dia-

gram.

If the power supply to the appliance is connected with

a flexible cable, ensure that the live conductors are

pulled taut before the earth conductor in the event of

strain relief failure. The length of the earth conductor

wire will depend on the design.

Danger

Incorrect core assignment can result in serious

injury and damage to the appliance.

Never interchange cores "L" and "N".

!Please note

Incorrect phase sequence can cause damage to

the appliance.

Ensure phase equality with the power supply of

the heat generator control unit.

Colour coding to IEC 60757

BN Brown

BU Blue

GNYE Green/yellow

Power supply (cont.)

6020379

Fig. 11

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

PWM1 Control voltage output

S1 Rotary switch

Z1 230 V relay output with 230 V input

fÖ Power supply

fÖ A Power supply for additional accessories

hH Connection for fault message signalling

equipment (floating switching contact)

jF PlusBus

Parts list

The following details are required when ordering parts:

■Serial no. (see type plate)

■Position number of the part

Connection and wiring diagram

6020379

0015

0014

0002

00050004

0006

0013

Fig. 12

AType plate

Pos. Part

0002 Casing top

0004 Connecting cable fÖA

0005 PlusBus cable

0006 Plug set DIO

0013 Strain relief fittings

0014 Fuse 2.0 A (slow), 250 V~ (10 pce)

0015 Installation and service instructions

Parts list (cont.)

6020379

Rated voltage 230 V~

Rated frequency 50 Hz

Rated current 2 A

Power consumption 2 W

Power consumption 9 mA

Permissible ambient temperature

■During operation 0 to +40 °C

■During storage and transport –20 to +60 °C

Output for rated breaking capacity hH (floating) 1 A 230 V~

Rated breaking capacity of output Z1 1 A 230 V~

Declaration of Conformity

We, Viessmann Werke GmbH & Co. KG, D-35107

Allendorf, declare as sole responsible body that the

named product complies with the European directives

and supplementary national requirements in terms of

its design and operational characteristics.

Conformity has been verified with the CE designation.

Using the serial number, the full Declaration of Con-

formity can be found on the following website:

www.viessmann.co.uk/eu-conformity

Specification

6020379

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