Viessmann EA1 Bedienungs- und Wartungshandbuch

Please file in Service Binder

5774 470 - 02 03/2015

EA1

Extension Module

Installation Instructions

for use by heating contractor

EA1 Extension Module

for programmable inputs and outputs

Product may not be exactly as shown

Read and save these instructions

for future reference.

IMPORTANT

Certified as a component

part for Viessmann boilers

EA1 Extension Module Installation

5774 470 - 02

Safety, Installation and Warranty Requirements

Please ensure that these instructions are read and understood before commencing installation. Failure to comply with

the instructions listed below and details printed in this manual can cause product/property damage, severe personal

injury, and/or loss of life. Ensure all requirements below are understood and fulfilled (including detailed information

found in manual subsections).

Product documentation

Read all applicable documentation before commencing

installation. Store documentation near boiler in a

readily accessible location for reference in the future

by service personnel.

For a listing of applicable literature,

please see section entitled “Important

Regulatory and Safety Requirements”.

Licensed professional heating contractor

The installation, adjustment, service and maintenance

of this equipment must be performed by a licensed

professional heating contractor.

Please see section entitled Safety and

“Important Regulatory and Installation

Requirements”.

Advice to owner

Once the installation work is complete, the heating

contractor must familiarize the system operator/

ultimate owner with all equipment, as well as safety

precautions/requirements, shutdown procedure, and

the need for professional service annually before the

heating season begins.

Safety

Warranty

Information contained in this and

related product documentation must

be read and followed. Failure to do

so renders the warranty null and void.

Safety, Installation and Warranty Requirements

5774 470 - 02

EA1 Extension Module Installation

Safety

Important Precautions

General Information

Installation

Connections

Additional Information

Safety, Installation and Warranty Requirements..............2

Product documentation...........................................2

Licensed professional heating contractor...................2

Advice to owner....................................................2

Warranty...............................................................2

Important Regulatory and Installation Requirements........4

Approvals.............................................................4

Codes..................................................................4

Working on the equipment......................................4

Power supply........................................................4

About these Installation Instructions..............................5

Mounting the Extension Kit............................................6

Extension kit for installation on a wall......................6

Overview of Electrical Connections...............................7

Connecting Digital Inputs.............................................8

Connecting the Analog Input 0-10V............................10

Connecting the KM Bus to the Boiler Control Unit.........10

Connecting the Circulation Pump or a

Fault Message Facility...............................................11

Power Supply..........................................................12

Connection and Wiring Diagram.................................14

Specifications..........................................................15

Page

Table of Contents

Page

5774 470 - 02

EA1 Extension Module Installation

Important Precautions

Important Regulatory and Installation Requirements

Approvals

Viessmann boilers, burners and controls are approved for

sale in North America by CSA International.

Codes

The installation of this unit shall be in accordance with

local codes. In the absence of local codes, use:

- CSA C22.1 Part 1 and/or local codes in Canada

- National Electrical Code ANSI/NFPA 70 in the U.S.

Always use latest editions of codes.

The heating contractor must comply with the Standard

for Controls and Safety Devices for Automatically Fired

Boilers, ANSI/ASME CSD-1 where required by the

authority having jurisdiction.

Working on the equipment

The installation, adjustment, service, and maintenance

of this product must be done by a licensed professional

heating contractor who is qualified and experienced in the

installation, service, and maintenance of hot water boilers.

There are no user serviceable parts on the boiler, burner,

or control.

Power supply

Install power supply in accordance with the regulations

of the authorities having jurisdiction or, in absence of

such requirements, in accordance with National Codes.

Viessmann recommends the installation of a disconnect

switch to the 120V power supply outside of the boiler

room.

Ensure main power supply to equipment, the heating

system, and all external controls have been deactivated.

Close main oil or gas supply valve. Take precautions in

both instances to avoid accidental activation of power

during service work.

Please carefully read this manual prior to attempting

installation. Any warranty is null and void if these

instructions are not followed.

For information regarding other Viessmann System

Technology componentry, please reference

documentation of the respective product.

We offer frequent installation and service seminars

to familiarize our partners with our products. Please

inquire.

The completeness and functionality of field supplied

electrical controls and components must be verified

by the heating contractor. These include low water

cut-offs, flow switches (if used), staging controls,

pumps, motorized valves, air vents, thermostats, etc.

WARNING

Turn off electric power supply before

servicing. Contact with live electric

components can cause shock or loss

of life.

5774 470 - 02

EA1 Extension Module Installation

About these Installation Instructions

General Information

Take note of all symbols and notations intended to draw attention to potential hazards or important

product information.

CAUTION

Cautions draw your attention to the presence of potential

hazards or important product information.

WARNING

Warnings draw your attention to the presence of potential

hazards or important product information.



IMPORTANT

Indicates an imminently hazardous situation which,

if not avoided, could result in death, serious injury or

substantial product/property damage.

Indicates an imminently hazardous situation which,

if not avoided, may result in minor injury or product /

property damage.

Helpful hints for installation, operation or maintenance

which pertain to the product.

This symbol indicates to note additional information

This symbol indicates that other instructions must be

referenced.

5774 470 - 02

Installation Instructions Extension EA1

Installation

Extension kit for installation on a wall

Components:

HEA1 extension module

HKM BUS plug aVG

HPower cord pre-wired to plug fÖ

HDigital inputs DE1, DE2 and DE3 plugs

H0-10VDC input plug

HProgrammable output plug aBJ

HAccessory power plug fÖA

Mounting the Extension Kit

1. Loosen the retaining screws from the extension kit

encloser (do not remove) .

2. Remove cover and set aside.

3. Mount the extension module enclosure to the wall

using the supplied hardware.

4. Install the cover.

5774 470 - 02

EA1 Extension Module Installation

Legend

DE1 Digital input 1

DE2 Digital input 2

DE3 Digital input 3

0-10V 0-10V input

fÖ Power supply

fÖA Power supply for additional accessories

aBJ Programmable output

aVG KM BUS to the control unit

A Extension EA1

F1 Fuse

Note: Apply strain relief to all on-site cables.

Close any unnecessary knock-outs with cable

entries (not cut open).

Connections

Overview of Electrical Connections

CAUTION

The electronic modules are static

sensitive. To avoid damage caused by

static discharge, follow Electro-Static

Discharge safety procedures.

5774 470 - 02

EA1 Extension Module Installation

Connecting Digital Inputs

The following functions can be connected alternatively:

HExternal heating program changeover for each heating

circuit

HExternal blocking

HExternal blocking with central fault message

HExternal demand with set flow temperature

HCentral fault message

HBrief operation of the DHW circulation pump

The hooked-up contacts must correspond to protection

class II.

Coding

address

Control unit

Vitotronic, type H... Vitotronic, type G...

Input DE1 3A 5d

Input DE2 3b 5E

Input DE3 3C 5F

Function assignment of inputs DE1 to DE3

Select the input functions by means of the codes on the

boiler control unit.

Complete description of the coding addresses:

Subject to function and digital input selected for the

respective function, the following codes need to be

changed at the boiler control unit:

Function Setting

Code 3A, 3b, 3C

(Vitotronic, type H ... )

Code 5d, 5E, 5F

(Vitotronic, type G ...)

No function 0

Heating program

changeover

External demand with set

flow temperature

External blocking 3

External blocking with fault

message input

Fault message input 5

Brief operation, DHW

circulation pump

Service instructions for boiler

or control unit

Connections

5774 470 - 02

EA1 Extension Module Installation

Assigning the heating program changeover function to the

heating circuits

Assign the heating program changeover function for the

respective heating circuit via code d8 at the boiler control

unit:

HChangeover via input DE1: Code d8:1

HChangeover via input DE2: Code d8:2

HChangeover via input DE3: Code d8:3

HSelect the effect of the heating program changeover

via code d5

HSet the duration of the changeover via code F2

Effect of the external blocking function on the pumps

HSelect the effect on the internal boiler circulation pump

(Vitotronic, type H ...) with code 3E

HSelect the effect on the respective heating circuit pump

with code d6

HSelect the effect on the circulation pump for DHW tank

heating (Vitotronic, type H ...) with code 5E

Effect of the external demand function on the pumps

HSelect the effect on the internal boiler circulation pump

(Vitotronic, type H ...) with code 3F

HSelect the effect on the respective heating circuit pump

with code d7

HSelect the effect on the circulation pump for DHW tank

heating (Vitotronic, type H ...) with code 5F

Set flow temperature for external demand

HThe set flow temperature can be selected with code 9b

Runtime of the DHW recirculation pump

Set the runtime:

HVitotronic, type H ...: Code 3d

HVitotronic, type G ...: Code 12

Refer to the boiler Service Instructions

Connecting Digital Inputs (continued)

Connections

5774 470 - 02

EA1 Extension Module Installation

Connecting the Analog Input 0-10V

The 0 - 10V hook-up provides an additional set boiler

water temperature:

0 - 1V seen as “no default set boiler water temperature”

1V set value 50°F (10°C)

10V set value 212°F (100°C)

On the Vitotronic, type G ... the range of the set value

default can be changed with code 1E:

1V set value 86°F (30°C)

10V set value 248°F (120°C)

Connections

Connecting the KM BUS to the Boiler Control Unit

Legend

A Extension EA1

B Connection area of boiler control unit

Boiler control unit installation

and service instructions

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