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Installation and service
instructions
for contractors
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 envi-
ronmental pollution.
Installation, commissioning, inspection,
maintenance and repairs must only be
carried out by an authorised, competent
person (heating engineer/installation
contractor).
Before working on the appliance/heat-
ing system, isolate it from the power
supply (e.g. by removing a separate
mains fuse or by means of a mains iso-
lator) and safeguard against unauthor-
ised reconnection.
When using gas as fuel, also close the
main gas shut-off valve and safeguard
against unintentional reopening.
5443233 GB
3/2020
VIESMANN
Note
Details identified by the word "Note"
contain additional information.
Check for gas tightness after installa-
tion.
Wear suitable personal protective
equipment when carrying out any work.
Repairing components that fulfil a
safety function can compromise the
safe operation of the system.
For replacements, use only original
spare parts supplied or approved by
Viessmann.
Install the components with new gas-
kets.
Dispose after installation.
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Table of Contents
Related Manuals for Viessmann EA1
Summary of Contents for Viessmann EA1
- Page 1 VIESMANN Installation and service instructions for contractors EA1 extension Function extension Safety instructions Please follow these safety instructions closely to prevent accidents and material losses. Safety instructions explained Danger Note This symbol warns against the Details identified by the word "Note"...
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Page 2: Disposal Of Packaging
Disposal of packaging Please dispose of packaging waste in line with statutory regulations. - Page 3 Symbols Sym- 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 environmental pollution Live electrical area Pay particular attention. ■...
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Page 4: Spare Parts Lists
Symbols (cont.) Spare parts lists Information about spare parts can be found at www.viessmann.com/etapp or in the Viessmann spare part app. Application Note ■ Vitotronic 200, type HO2B In the following, the different Vitotronic ■ Vitotronic 200, type GW7B control units are designated as group A, B or C. -
Page 5: Wall Mounting
Wall mounting Overview of electrical connections [{{] fÖ 0-10V 1 2 3 4 Ö EA1 extension Central fault message facility/ Digital input 1 feed pump/DHW circulation Digital input 2 pump (floating switching con- Digital input 3 tact) 0 - 10 V 0 - 10 V input... - Page 6 Overview of electrical connections (cont.) Please note Note Electronic assemblies can be Apply strain relief to on-site cables. damaged by electrostatic loads. Seal any unnecessary apertures with Before beginning work, touch cable grommets (not cut open). earthed objects, such as heating or water pipes, to discharge static loads.
- Page 7 Connecting digital inputs (groups A and B) (cont.) Function Setting at relevant coding ad- dress No function Operating program changeover External demand with set flow temperature External blocking External blocking with fault message input Fault message input Brief operation, DHW circulation pump Complete description of the coding Effect of the "External blocking"...
- Page 8 Connecting digital inputs (groups A and B) (cont.) Set flow temperature for external demand ■ Select the set flow temperature in coding address 9b. Connecting digital inputs (group C) Function assignment of inputs DE1 to DE3 Input functions are permanently External contacts must be potential- assigned for the Vitotronic 200, type free.
- Page 9 Connecting digital inputs (group D) (cont.) Function assignment of inputs DE1 to DE3 Select the input functions by means of the parameter settings on the heat gen- erator control unit: Digital input Control unit parameters (General group) Depending on the function and the digi- tal input selected for it, set the following parameters at the Vitotronic control unit:...
- Page 10 Connecting digital inputs (group D) (cont.) ■ Select the effect of the operating pro- Set flow temperature for external gram changeover via parameter 1F demand (Heating circuit group). ■ Set the duration of the changeover ■ Select the set flow temperature in via parameter 24 (Heating circuit parameter 0B (General group).
- Page 11 Connecting a circulation pump or a fault… (cont.) Operating the heating circuit pump at low speed (night contact) fÖ Ö N PE A Circulation pump D Separate power supply B Night contact input C Contactor In reduced mode, the connected heat- Select the function: ing circuit pump is operated at low ■...
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Page 12: Function Assignment
Connecting a circulation pump or a fault… (cont.) Group C: ■ Circulation pump for swimming pool heating fÖ Ö L1 N A Circulation pump for swimming C Junction box (on site) pool heating (accessories) D Fuse and contactor for circulation B 3-way diverter valve "swimming pump for swimming pool heating pool"... - Page 13 Connecting a circulation pump or a fault… (cont.) If EA1 extension is connected to the Fault message facility heating circuit control unit, the feed pump is started directly. If a digital input is used as fault mes- sage input, the connected fault mes-...
- Page 14 Connecting the analogue input 0 - 10 V [{{] 0-10V fÖ Ö Ensure correct polarity of the DC con- Note trol voltage 0 - 10 V. Ensure galvanic separation between the earth conductor and the negative pole of the on-site power source. Groups A and B Cannot be used with Vitotronic 200-H, On the Vitotronic, type G ...
- Page 15 Connecting the analogue input 0 - 10 V (cont.) This function is activated via parameter 0 – 1 V "No specification for boiler out- "45:00". put" 0 – 1 V "No specification for set boiler ■ Single boiler system: The water temperature"...
- Page 16 0-10V 1 2 3 4 7 6 5 4 3 2 1 5 4 3 2 1 A EA1 extension D Wall mounted gas condensing boil- B ■ Vitotronic control unit with ers and storage combi boilers with plug aVG plug aVG ■...
- Page 17 ■ lH Never interchange cores "L" and ■ aBH "N". Power supply (groups A, B and D) fÖ Ö 230 V~ A EA1 extension B Heat generator control unit or other accessory...
- Page 18 Ö L ? N X2.N X3.1/ X3.2/ X3.3 A EA1 extension B Vitotronic 200, type WO1C Power supply and KM BUS connection of accessories Danger ■ Route extra low voltage (ELV) Incorrectly executed electrical leads < 42 V and installations can result in injuries >...
- Page 19 Power outlet Extension kit for heating circuit Control unit power outlet with mixer M3 aVG KM BUS connection AM1 extension, EA1 extension and/or solar control module, type If the current flowing to the connected Accessories Internal fuse working parts (e.g. circulation pumps) is...
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Page 20: Direct Power Supply
The appliance and pipework must be connected to the equi- potential bonding of the building. A EA1 extension B Mains isolator (if required) Isolators for non-earthed conductors ■ The mains isolator (if installed) must simultaneously isolate all non-... -
Page 21: Connection And Wiring Diagram
Connection and wiring diagram Digital input 1 KM-BUS to the control unit Digital input 2 Fault message facility/feed Digital input 3 pump/swimming pool heating 0 - 10 V 0 - 10 V input circulation pump/DHW circula- Power supply fÖ tion pump (potential-free) Power supply for additional fÖ... -
Page 22: Specification
2 (1) A 230 V~ Rated breaking capacity of output aBJ (po- tential-free) Declaration of Conformity We, Viessmann Werke Using the serial number, the full Decla- GmbH & Co. KG, D-35107 Allendorf, ration of Conformity can be found on declare as sole responsible body that... - Page 24 Viessmann Werke GmbH & Co. KG Viessmann Limited D-35107 Allendorf Hortonwood 30, Telford Telephone: +49 6452 70-0 Shropshire, TF1 7YP, GB Fax: +49 6452 70-2780 Telephone: +44 1952 675000 www.viessmann.com Fax: +44 1952 675040 E-mail: info-uk@viessmann.com...
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