Viessmann EM-EA1 extension Guida rapida

5831392 GB 6/2018

Installation and service

instructions

for contractors

VIESMANN

EM-EA1 extension

Function extension for forwarding fault messages

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 envi-

ronmental 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 contrac-

tor).

Before working on the equipment/heat-

ing system, isolate the power supply

(e.g. by removing a separate mains

fuse or by means of a mains isolator)

and safeguard against unauthorised

reconnection.

When using gas as fuel, also close the

main gas shut-off valve and safeguard

against unauthorised reopening.

Repairing components which fulfil a

safety function can compromise the

safe operation of your heating system.

For replacements, use only original

spare parts supplied or approved by

Viessmann.

Overview of electrical connections

jF jF [{][{][{] hH [{] fÖ

1234123456121212?

1??

DI1 Digital input 1

Mounting on the wall

5831392

DI2 Digital input 2

(no function)

DI3 Digital input 3 (no func-

tion)

0 - 10 V IN 0 - 10 V input (no func-

tion)

0 - 10 V OUT 0 - 10 V output (no func-

tion)

PWM1 Output, control voltage

(no function)

S1 Rotary switch for codes

Z1 fD 230 V relay output with

230 V input

fÖ Power supply

fÖ A Power supply for addi-

tional accessories

hH Connection for fault

message signalling

equipment (floating

switching contact)

jF PlusBus

!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.

Blank off unnecessary knockouts with

cable grommets (not cut out).

Connect fault message facility to output hH

? ?

fÖf-]

hH Z1

Rated current max. 1 A~

Overview of electrical connections (cont.)

5831392

jF jF [{][{][{]

DI1 DI2 DI3

1234123456

Function: Floating switching contact,

e.g. at condensate pump. When the

contact is closed, the gas condensing

module and fuel cell module are

blocked. Fault message output hH is

activated.

Connections at plug Z1

[{] fÖ

1??

Connection at terminals 1 and L

Functions:

■ Fault message input 230 V

When the contact is closed, the gas

condensing module and fuel cell

module are blocked. Fault message

output hH is activated.

■ External fault message

Fault message output hH is activa-

ted.

Configuring the function

Configure the settings of the connected

function during commissioning using

the heat generator's commissioning

assistant.

Heat generator installation and

service instructions

Connecting the "external blocking" signal to digital input DI1

5831392

Rotary switch S1 must be set to 1 (fac-

tory setting).

Connecting the PlusBus to the heat generator control unit

1 2

jF jF [{][{][{]

DI1 DI2 DI3

1234123456

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 instructions

Rotary switch S1

5831392

Power supply at the heat generator control unit

L?NL

156

AExtension

fÖ Power supply

fÖAPower supply for further accesso-

ries

aBH Plug for power supply to accesso-

ries in the heat generator control

unit

Create the power supply connection.

Route the power cable to the heat gen-

erator control unit and connect to plug

aBH.

If power is supplied to a further acces-

sory, use plug fÖA provided

Heat generator installation and

service instructions

Danger

Incorrect core assignment can

result in serious injury and dam-

age 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 serious injury from

electrical current and result in

appliance damage.

Power supply

5831392

Connect the power supply and

implement all safety measures

(e.g. RCD circuit) in accordance

with the following regulations:

■ IEC 60364-4-41

■ VDE regulations

■ Technical connection require-

ments (TAB) specified by the

local grid operator

Danger

The absence of system compo-

nent earthing can lead to seri-

ous injury from electric current if

an electrical fault occurs.

The appliance and pipework

must be connected to the equi-

potential 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 conductors must be iso-

lated from the power supply by the

upstream circuit breaker with a mini-

mum contact separation of 3 mm.

Power supply (cont.)

5831392

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 accord-

ance with the diagram.

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 dam-

age 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 gener-

ator control unit.

Colour coding to IEC 60757

BN Brown

BU Blue

GNYE Green/yellow

Power supply (cont.)

5831392

DI1 Digital input 1

DI2 Digital input 2

(no function)

DI3 Digital input 3 (no func-

tion)

0 - 10 V IN 0 - 10 V input (no func-

tion)

0 - 10 V OUT 0 - 10 V output (no func-

tion)

PWM1 Output, control voltage

(no function)

S1 Rotary switch

Z1 230 V relay output with

230 V input

fÖ Power supply

fÖ A Power supply for addi-

tional accessories

hH Connection for fault

message signalling

equipment (floating

switching contact)

jF PlusBus

Connection and wiring diagram

5831392

The following details are required when

ordering parts:

■ Serial no. (see type plate)

■ Position number of the part

Parts list

5831392

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