Viessmann MPA51 Manuel de formation
Operating and service
instructions
for contractors
VIESMANN
Gas burner control unit replacement
Type MPA51 with MPA5113
Gas burner control unit replacement
5782 991 GB 1/2014 Please keep safe.
2
Please follow these safety instructions closely to prevent accidents and mate-
rial 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" con-
tain additional information.
Target group
These instructions are exclusively inten-
ded for qualified contractors.
■ Work on gas installations must only be
carried out by a registered gas fitter.
■ Work on electrical equipment must
only be carried out by a qualified elec-
trician.
■ The system must be commissioned by
the system installer or a qualified per-
son authorised by the installer.
Regulations
Observe the following when working on
this system:
■ Statutory regulations regarding the
prevention of accidents
■ Statutory regulations regarding envi-
ronmental protection
■ The Code of Practice of relevant trade
associations
■ All current safety regulations as
defined by DIN, EN, DVGW, TRGI,
TRF, VDE and all locally applicable
standards
aÖNORM, EN, ÖVGW-TR Gas,
ÖVGW-TRF and ÖVE
cSEV, SUVA, SVGW, SVTI,
SWKI, VKF and EKAS guideline
1942: LPG, part 2
If you smell gas
Danger
Escaping gas can lead to explo-
sions which may result in serious
injury.
■ Do not smoke. Prevent naked
flames and sparks. Do not
switch lights or electrical appli-
ances on or off.
■ Close the gas shut-off valve.
■ Open windows and doors.
■ Evacuate any people from the
danger zone.
■ Notify your gas or electricity
supplier and your local heating
contractor from outside the
building.
■ Shut off the electricity supply to
the building from a safe place
(outside the building).
Safety instructions
Safety instructions
5782 991 GB
3
If you smell flue gas
Danger
Flue gas can lead to life threat-
ening poisoning.
■ Shut down the heating system.
■ Ventilate the installation site.
■ Close all doors in the living
space.
Flue systems and combustion air
Ensure that flue systems are clear and
cannot be sealed, for instance due to
accumulation of condensate or other
causes. Ensure a sufficient supply of
combustion air.
Instruct system users that subsequent
modifications to the building characteris-
tics are not permissible (e.g. cable/pipe-
work routing, cladding or partitions).
Danger
Leaking or blocked flue systems,
or an insufficient supply of com-
bustion air can cause life threat-
ening poisoning from carbon
monoxide in the flue gas.
Ensure the flue system is in
proper working order. Apertures
for supplying combustion air
must be non-closable.
Extractors
Operating appliances that extract air to
the outside (cooker hoods, extractors, air
conditioning units, etc.) can create neg-
ative pressure. If the boiler is operated at
the same time, this can lead to reverse
flow of the flue gas.
Danger
The simultaneous operation of
the boiler and appliances that
extract air to the outside can
result in life threatening poison-
ing due to reverse flow of the flue
gas.
Fit an interlock circuit or take suit-
able steps to ensure a sufficient
supply of combustion air.
Working on the system
■ Where gas is used as the fuel, close
the main gas shut-off valve and safe-
guard it against unintentional reopen-
ing.
■ Isolate the system from the power sup-
ply (e.g. by removing the separate fuse
or by means of a mains isolator) and
check that it is no longer 'live'.
■ Safeguard the system against recon-
nection.
Danger
Hot surfaces can cause burns.
■ Before maintenance or service
work, switch OFF the appli-
ance and let it cool down.
■ Never touch hot surfaces on
the boiler, burner, flue system
or pipework.
!Please note
Electronic assemblies can be
damaged by electrostatic dis-
charge.
Before beginning work, touch
earthed objects, such as heating
or water pipes, to discharge static
loads.
Safety instructions
Safety instructions (cont.)
5782 991 GB
4
Repair work
!Please note
Repairing components that fulfil a
safety function can compromise
the safe operation of the sys-
tem.
Faulty components must be
replaced with original Viessmann
spare parts.
Auxiliary components, spare and
wearing parts
!Please note
Spare and wearing parts that
have not been tested together
with the system can compromise
its function. Installing non-author-
ised components and making
non-approved modifications or
conversions can compromise
safety and may invalidate the
warranty.
For replacements, use only orig-
inal spare parts supplied or
approved by Viessmann.
Safety instructions
Safety instructions (cont.)
5782 991 GB
5
Operating instructions
Burner control unit............................................................................................. 6
Service instructions
Diagnosis............................................................................................................ 13
Flow diagram...................................................................................................... 24
Connection diagram........................................................................................... 26
Parts list.............................................................................................................. 27
Index
Index
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6
Display and programming unit
Function
A display and programming unit is inte-
grated into the burner control unit. The
display screen shows the relevant oper-
ating status, the service and parameter
status, as well as any fault or error mes-
sages.
Status Service
S
A
B
C
AReset button
BLED: left – heat demand; centre –
flame; right – fault
CSelection key (Select)
The display screen comprises three dig-
its consisting of seven segments each.
Four keys serve to make adjustments at
the different operating levels.
Operating display
In standard mode, the status indicator
shows the current operating status. The
same applies after pressing reset follow-
ing a fault.
The following displays are scrolled
through automatically. If a fault occurs,
see the fault codes from page 13. You
can exit at any time by pressing the reset
button R (for 5 to 10 s).
Status Service
Standby
Burner control unit
Burner control unit
5782 991 GB
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Status Service
Start
Heat demand
System tests
Status Service
Idle state check
Fan ramp-up
Status Service
Valve check
Status Service
Pre-purge
Status Service
Pre-ignition
Status Service
Safety time
Flame formation
Status Service
Flame stabilisation
Status Service
Operation with flame
Burner control unit
Burner control unit (cont.)
5782 991 GB
Operation
8
Status Service
Post-purge
Status Service
Standby
Display Status
(one digit)
Service
(two digits)
See
Operating display in
standard mode
Current operating
condition/status
Display "FL" if a flame
signal is present
Page 6
and 8
Operating display for
operation deviating
from standard mode
Message code "A" or
"C"
— Table on
page 13
Information display Status 1 to 7 Information on current
meter readings
Page 8
Service display Message code "d" Current level of modu-
lation
Page 10
Fault display Message code "F" Fault code display Table on
page 13
Fault memory Status 0 to 9 Calling up the last 10
faults
Page 12
Information display
The information display is activated from
the operating display.
Information regarding current meter
readings, such as the start-up meter and
permanent hours run meter, can be
called up via the information display.
This mode is automatically terminated if
no other key is pressed within 20 s.
Press S to jump to the next status. You
can exit any status display by pressing
reset button A.
Press a and S simultaneously to acti-
vate the information display.
Burner control unit
Burner control unit (cont.)
5782 991 GB
9
Status Service
Quality of the ionisation current
Note
Ionisation current > 50 is very good. If the
value is lower, measure the ionisation
current. The ionisation current should be
> 3 μA. If not, check the ionisation cable
and ionisation electrode.
Status Service
Start counter with reset, 1 digit
Status Service
Start counter with reset, 100 digit
Status Service
Start counter with reset, 1000 digit
Status Service
Hours run meter with reset, 1 digit
Status Service
Hours run meter with reset, 100 digit
Status Service
Hours run meter with reset, 1000 digit
Burner control unit
Burner control unit (cont.)
5782 991 GB
Operation
10
Manual mode and service display
To call up the service display and for
manual mode, the control unit must be
issuing a heat demand. The service dis-
play shows the current modulation level
in %.
Display:
"d 0" Lower heating output
"d 00" Upper heating output
Status Service
1. Press b and S simultaneously to
switch the burner to manual mode.
The display shows "d" = control stop
under status.
2. Adjust the lower heating output:
Press b until the display
shows "d 0".
3. Adjust the upper heating output:
Press a until the display shows
"d 00".
4. Pressing b and S simultaneously
returns the burner to modulating
mode. The burner continues at the
original modulation level at which the
status "d" = control stop was initi-
ated.
Fault display
If the burner control unit switches to a
fault state, the fault display is automati-
cally activated. The most recent fault is
then displayed.
Status Service
A Fault code of the most recent fault
(see table on page 13)
Burner control unit
Burner control unit (cont.)
5782 991 GB
Ce manuel convient aux modèles suivants
1
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Autres manuels Viessmann Cheminée intérieure
