Viessmann EM-EA1 extension Quick guide

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.

2
1.
Overview of electrical connections
jF jF [{][{][{] hH [{] fÖ
1234123456121212?
1??
fD
K1
DI1 Digital input 1
Mounting on the wall
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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-]
A
hH Z1
?
1
?
N
L
Rated current max. 1 A~
Overview of electrical connections (cont.)
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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??
fD
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
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Rotary switch S1 must be set to 1 (fac-
tory setting).
Connecting the PlusBus to the heat generator control unit
B
74
1 2
A
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
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Power supply at the heat generator control unit
L?NL
?
N
156
LN
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
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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.)
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L1
B
FE
D
D
N
C
A
40
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.)
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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
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The following details are required when
ordering parts:
■ Serial no. (see type plate)
■ Position number of the part
Parts list
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