Viessmann EM-EA1 extension Istruzioni operative

5838029 GB 12/2018

Installation and service instructions

for contractors

VIESMANN

EM-EA1 extension

DIO electronics module

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 heat genera-

tor service instructions. Only one function can be con-

nected to each EM-EA1 extension (DIO electronics

module).

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 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

Mounting on the wall

5838029

Function Connections

DI1 DI2 DI3 PWM1 0 - 10 V

0 - 10 V

OUT

66 Z1-1

230 V

Z1-L

OUT

230 V

230 V fault message input and

fault message output (potential-

free) without system blocking

Fault message input: If 230 V volt-

age is present at digital input con-

tact Z1-1, fault message is active.

Fault message output 66 active.

X X

External LPG valve

Output Z1-L is active if the burner

control unit opens the external

LPG valve.

Extractor hood: External extrac-

tor interlock

An extractor can be switched off.

Output 66 switches from Ö to S

and thereby switches the extractor

hood off when the burner control

unit starts the burner.

Changing operating modes

Demand to all available heating

circuits simultaneously, as long as

contact remains closed. With the

relevant selected set room tem-

perature of the individual heating

circuit:

DI1 Reduced room temperature

DI2 Standard room temperature

DI3 Comfort room temperature

X X X

Fault message input 24 V and

system blocking, e.g. conden-

sate removal pump

If contact DI1 is closed, the heat

generator is blocked. Output 66 is

switched over. Fault message F.

104 appears. E.g. block burner, if

fault is present at condensate re-

moval pump.

Note

If only the fault message output is

to be used, e.g. setting the "fault

message input... and fault mes-

sage output" functions.

X X

Fault message input 230 V and

system blocking

If 230 V voltage is present at digi-

tal input contact Z1-1, the heat

generator is blocked. Output 66 is

switched over. Fault message F.

104 appears.

X X

Electrical connections (cont.)

5838029

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 230 V voltage is present at digi-

tal input contact Z1-1, a demand is

sent to the heat generator with an

adjustable set flow temperature

(parameter 528.0) and a set

speed for the primary circuit pump

(parameter 1100.2).

External enable

If 230 V voltage is present at digi-

tal input contact Z1-1, the heat

generator will be blocked. Mes-

sage info I.57 is displayed.

!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 the extractor hood/extractor to output hH

? ?

fÖf-]

hH Z1

Fig. 4

Electrical connections (cont.)

5838029

Connect high efficiency pumps via a contactor, rather

than directly.

Connecting a floating switching contact to digital inputs DI1 to DI3

This function is enabled when the input is closed.

External contacts must be floating. When connecting

external contacts, observe the requirements of safety

category II, i.e. 5.0 mm air and creep path or 2.0 mm

insulation thickness to live parts.

jF jF [{][{][{]

DI1 DI2 DI3

1234123456

Fig. 5

Connecting the LPG valve to plug Z1

[{] fÖ

1??

Fig. 6

Connection of 230 V input to Z1-1

Fault message input and conductor L of the power

supply at plug fÖ must be identical.

? ?

fÖf-]

A B

Fig. 7

AFault message facility

BJunction box

Connecting the circulation pump to output hH

5838029

Fig. 8

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 (DIO electronics module) is set to 1, an

EM-MX, EM-M1 or EM-P1 extension (ADIO electronics

module) 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

Connecting the PlusBus to the heat generator

1 2

jF jF

1234

Fig. 9

AExtension (electronics module)

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

Rotary switch S1 for subscriber number addressing

5838029

Power supply at heat generator

L?NL

156

Fig. 10

AExtension (electronics module)

fÖ Power supply

fÖAPower supply for further accessories

aBH Plug for heat generator accessories power supply

Create the power supply connection.

Route the power cable to the heat generator and con-

nect to plug aBH. Observe MCB/fuse protection, out-

put, plug aBH of the heat generator.

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.

Never interchange cores "L" and "N".

Separate power supply

If the power supply for the extension is not made at

the heat generator.

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

■TAR medium voltage VDE-AR-N-4110

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.

Power supply

5838029

Fig. 11

APower supply, extension (electronics module)

BPower supply, heat generator

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 heat generator

power supply.

Colour coding to IEC 60757

BN Brown

BU Blue

GNYE Green/yellow

Power supply (cont.)

5838029

Power supply and PlusBus connection

Power supply to all accessories via heat generator control unit

40A

B C

96/156

40A

Fig. 12

Some accessories with direct power supply

40A

B C

96/156

40A

Fig. 13

AHeat generator control unit

BMixer extension kit for heating circuit with

mixer M2 (ADIO electronics module)

CMixer extension kit for heating circuit with

mixer M3 (ADIO electronics module)

DFurther accessories

EON/OFF switch

fÖ (A) Power supply

jF PlusBus

lH/aBH Accessories power supply in the control unit of

the heat generator

■In the following circumstances, use the output for the

accessories only to switch an on-site relay:

An actuator (e.g. circulation pump) with a higher

power demand than the fuse rating required for the

accessories is connected at the accessories output.

■In the following circumstances, connect one or more

accessories directly to the mains supply via an

ON/OFF switch:

The max. permissible total current of the control unit

for the heat generator is exceeded.

Note

In this event, the accessories concerned cannot be

isolated with the ON/OFF switch on the control unit.

Connecting several accessories

5838029

Fig. 14

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, 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

Parts list

The following details are required when ordering parts:

■Serial no. (see type plate)

■Position number of the part

Connection and wiring diagram

5838029

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