Viessmann EM-EA1 Installation And Service Instructions For Contractors
Dio electronics module function extension
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Installation and service instructions
for contractors
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
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).
5838029 GB
12/2018
installation contractor).
/
Before working on the equipment
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.
Up to max. 3 EM-EA1 extensions can be connected to
a heat generator.
VIESMANN
heating system, iso-
/
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Summary of Contents for Viessmann EM-EA1
- Page 1 Viessmann. Application information The functions that can be connected depend on the Up to max. 3 EM-EA1 extensions can be connected to settings made at the heat generator. See heat genera- a heat generator. tor service instructions. Only one function can be con- nected to each EM-EA1 extension (DIO electronics module).
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Page 2: Mounting On The Wall
Mounting on the wall Fig. 1 Electrical connections fÖ 1 2 3 4 5 6 Fig. 2 Digital input 1 230 V relay output, 230 V input Digital input 2 Power supply fÖ Digital input 3 Power supply for additional accessories fÖ... - Page 3 Electrical connections (cont.) Function Connections PWM1 0 - 10 V 0 - 10 V Z1-1 Z1-L 230 V 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.
- Page 4 Electrical connections (cont.) Function Connections PWM1 0 - 10 V 0 - 10 V Z1-1 Z1-L 230 V 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...
- Page 5 Connecting the circulation pump to output 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 DI1 DI2 DI3 category II, i.e.
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Page 6: Configuring Functions
Rotary switch S1 for subscriber number addressing 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... -
Page 7: Separate Power Supply
Power supply Power supply at heat generator Create the power supply connection. Route the power cable to the heat generator and con- nect to plug . Observe MCB/fuse protection, out- put, plug of the heat generator. If power is supplied to a further accessory, use plug A provided fÖ... - Page 8 Power supply (cont.) 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.
- Page 9 Connecting several accessories Power supply and PlusBus connection Power supply to all accessories via heat generator control unit Fig. 12 Some accessories with direct power supply Fig. 13 Heat generator control unit ON/OFF switch Mixer extension kit for heating circuit with (A) Power supply fÖ...
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Page 10: Connection And Wiring Diagram
Connection and wiring diagram Fig. 14 Digital input 1 Power supply fÖ Digital input 2 Power supply for additional accessories fÖ Digital input 3 Changeover contact (floating switching 0 - 10 V IN 0 - 10 V input contact) for connecting signalling equip- 0 - 10 V OUT 0 - 10 V output ment for fault messages or an extractor PWM1... - Page 11 Parts list (cont.) 0001 0007 0007 0015 0014 0013 0006 0004 0005 Fig. 15 Type plate...
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Page 12: Specification
Rated breaking capacity of output Z1 1 A 230 V~ Declaration of Conformity We, Viessmann Werke GmbH & Co. KG, D-35107 Conformity has been verified with the CE designation. Allendorf, declare as sole responsible body that the Using the serial number, the full Declaration of Con-...