DeDietrich Innovens MCA 25 BIC User manual

Innovens EN
Wall-hung gas condensing boilers
MCA 25/28 BIC
User Guide
300022162-001-01

Contents
1 Introduction ................................................................................................4
1.1 Symbols used .......................................................4
1.2 Abbreviations ........................................................4
1.3 General ..................................................................5
1.3.1 Manufacturer's liability .............................................5
1.3.2 Installer's liability .....................................................5
1.3.3 User's liability ..........................................................5
1.4 Certifications .........................................................6
2Safety instructions and recommendations ..............................................7
2.1 Safety instructions ...............................................7
2.2 Recommendations ................................................8
3Description ..................................................................................................9
3.1 Operating principle ...............................................9
3.1.1 Gas/air setting .........................................................9
3.1.2 Combustion .............................................................9
3.1.3 Heating and domestic hot water production ............9
3.2 Main parts ............................................................10
3.3 Control panel .......................................................11
3.3.1 Description of the keys ..........................................11
3.3.2 Description of the display ......................................12
3.3.3 Browsing in the menus ..........................................15
4 Operating the boiler .................................................................................16
4.1 Commissioning the boiler ..................................16
4.2 Reading out measured values ...........................16
4.3 Changing the settings ........................................18
4.3.1 Setting the set point temperatures ........................18
4.3.2 Selecting the operating mode ...............................19
4.3.3 Forcing domestic hot water production .................20
4.3.4 Setting the contrast and lighting on the
display ...................................................................20
4.3.5 Setting the time and date ......................................21
4.3.6 Selecting a timer programme ................................21
4.3.7 Customising a timer programme ...........................22
115/06/12 - 300022162-001-01

4.4 Installation shutdown .........................................24
4.5 Frost protection ..................................................24
5 Checking and maintenance .....................................................................26
5.1 General instructions ...........................................26
5.2 Periodic checks ..................................................26
5.3 Filling the system ...............................................27
5.4 Bleeding the heating system .............................29
5.5 Draining the installation .....................................31
6 Troubleshooting .......................................................................................32
6.1 Anti-hunting ........................................................32
6.2 Messages (Code type Bxx or Mxx) ....................32
6.3 Faults (Code type Lxx or Dxx) ...........................34
7 Technical specifications ..........................................................................40
7.1 Technical specifications ....................................40
8 Energy savings .........................................................................................41
8.1 Energy-saving advice .........................................41
8.2 Recommendations ..............................................41
9 Warranty ....................................................................................................42
9.1 General ................................................................42
9.2 Warranty terms ...................................................42
Contents
215/06/12 - 300022162-001-01

315/06/12 - 300022162-001-01

1 Introduction
1.1 Symbols used
In these instructions, various danger levels are employed to draw the
user's attention to particular information. In so doing, we wish to
safeguard the user's safety, obviate hazards and guarantee correct
operation of the appliance.
DANGER
Risk of a dangerous situation causing serious physical
injury.
WARNING
Risk of a dangerous situation causing slight physical
injury.
CAUTION
Risk of material damage.
Signals important information.
¼ Signals a referral to other instructions or other pages in the
instructions.
1.2 Abbreviations
43CE: Collective conduit for sealed boiler
4DHW: Domestic hot water
4Hi: Lower heating value LHV (Nett)
4Hs: Higher heating value HHV (Gross)
4PPS: Polypropylene hardly inflammable
4PCU: Primary Control Unit - PCB for managing burner operation
4PSU: Parameter Storage Unit - Parameter storage for PCBs
PCU and SU
4SCU: Secondary Control Unit - control panel PCB
4SU: Safety Unit - Safety PCB
43WV: 3-way valve
MCA 25/28 BIC 1. Introduction
15/06/12 - 300022162-001-01 4

1.3 General
1.3.1. Manufacturer's liability
Our products are manufactured in compliance with the requirements
of the various applicable European Directives. They are therefore
delivered with [ marking and all relevant documentation.
In the interest of customers, we are continuously endeavouring to
make improvements in product quality. All the specifications stated in
this document are therefore subject to change without notice.
Our liability as the manufacturer may not be invoked in the following
cases:
4Failure to abide by the instructions on using the appliance.
4Faulty or insufficient maintenance of the appliance.
4Failure to abide by the instructions on installing the appliance.
1.3.2. Installer's liability
The installer is responsible for the installation and inital start up of the
appliance. The installer must respect the following instructions:
4Read and follow the instructions given in the manuals provided
with the appliance.
4Carry out installation in compliance with the prevailing legislation
and standards.
4Perform the initial start up and carry out any checks necessary.
4Explain the installation to the user.
4If a maintenance is necessary, warn the user of the obligation to
check the appliance and maintain it in good working order.
4Give all the instruction manuals to the user.
1.3.3. User's liability
To guarantee optimum operation of the appliance, the user must
respect the following instructions:
4Read and follow the instructions given in the manuals provided
with the appliance.
4Call on qualified professionals to carry out installation and initial
start up.
4Get your installer to explain your installation to you.
4To carry out inspections and maintenance required by a qualified
professional.
4Keep the instruction manuals in good condition close to the
appliance.
1. Introduction MCA 25/28 BIC
515/06/12 - 300022162-001-01

This appliance is not intended to be used by persons (including
children) whose physcial, sensory or mental capacity is impaired or
persons with no experience or knowledge, unless they have the
benefit, through the intermediary of a person responsible for their
safety, of supervision or prior instructions regarding use of the
appliance. Care should be taken to ensure that children do not play
with the appliance.
1.4 Certifications
CE identification no PIN 0063BT3444
NOx classification 5 (EN 297 pr A3, EN 656)
Type of connection Chimney: B23 (1), B23P (1), B33
Flue gas outlet: C13(x) , C33(x) , C43(x) , C53 ,
C63(x) , C83(x) , C93(x)
(1) IP20
MCA 25/28 BIC 1. Introduction
15/06/12 - 300022162-001-01 6

2 Safety instructions and
recommendations
2.1 Safety instructions
DANGER
If you smell gas:
1. Do not use a naked flame, do not smoke, do not
operate electrical contacts or switches ( doorbell,
light, motor, lift, etc..).
2. Shut off the gas supply.
3. Open the windows.
4. Evacuate the premises.
5. Call your fitter.
DANGER
If you smell flue gases:
1. Switch the appliance off.
2. Open the windows.
3. Evacuate the premises.
4. Call your fitter.
WARNING
Depending on the settings of the appliance:
4The temperature of the flue gas conduits may exceed
60°C.
4The temperature of the radiators may reach 85°C.
4The temperature of the domestic hot water may reach
65°C.
CAUTION
Do not neglect to service the appliance:
4For completely safe and optimum operation, you
must have your boiler regularly serviced by an
approved installer.
2. Safety instructions and recommendations MCA 25/28 BIC
715/06/12 - 300022162-001-01

2.2 Recommendations
WARNING
Only qualified professionals are authorised to work on the
appliance and the installation.
4Regularly check the water pressure in the installation (minimum
pressure 0,8 bar, recommended pressure between 1,5 and 2,0
bar).
4Keep the appliance accessible at all times.
4Never remove or cover labels and rating plates affixed to the
appliance. Labels and rating plates must be legible throughout the
entire lifetime of the appliance.
4The appliance should be on Summer or Antrifreeze mode rather
than switched off to guarantee the following functions:
-Anti blocking of pumps
-Frost protection
MCA 25/28 BIC 2. Safety instructions and recommendations
15/06/12 - 300022162-001-01 8

3 Description
3.1 Operating principle
3.1.1. Gas/air setting
The casing fitted to the boiler is also used as an air box. Air is sucked
in by the fan and gas injected into the venturi by the fan intake. The
fan rotation speed is set according to the settings parameters, the
thermal energy requirement and the temperatures measured by the
temperature sensors. The gas and air are mixed in the venturi. The
gas/air ratio ensures that the quantities of gas and air are adjusted to
each other. This provides optimum combustion on the entire output
range. The gas/air mixture is fed into the burner on top of the
exchanger.
3.1.2. Combustion
The burner heats the heating water circulating in the heat
exchanger. At a return temperature lower than around 55°C, the flue
gases cool down to a temperature lower than the dew point, thus
causing the condensation of the water vapour contained in the flue
gases in the back side of the heat exchanger. The heat released
during this condensation process (the latent heat or condensing heat)
is also transferred to the heating water. The cooled combustion gases
are evacuated via the combustion gas outlet flue. The condensation
water is evacuated via a siphon.
3.1.3. Heating and domestic hot water production
An integrated plate exchanger handles domestic hot water
production. A 3-way valve determines whether the heated water is
fed into the heating system or the plate exchanger. A DHW sensor
signals domestic hot water demands. This signal is transmitted to the
control panel, which then switches the 3-way valve to the hot water
position and trips the heating pump. The 3-way valve is spring-loaded
but only consumes electricity when it switches to another position.
The heating water reheats the domestic water in the plate
exchanger. This water is pumped into the boiler tank to provide a
constant plentiful supply of domestic hot water. In comfort mode, if no
domestic hot water is drawn off, the boiler reheats the plate exchanger
and the boiler tank at regular intervals. Any limescale particles are
kept out of the plate exchanger by a self-cleaning water filter (self-
cleans once every 76 hours).
3. Description MCA 25/28 BIC
915/06/12 - 300022162-001-01

3.2 Main parts
1Flue gas discharge pipe
2Casing/air box
3Flue gas measuring point
4Mixer pipe
5Heating flow hose
6Air intake silencer
7Box for the control PCBs
8Combined venturi and gas valve unit
9Flow end hydroblock
10 Safety valve outlet pipe
11 Siphon
12 Control panel
13 Tank drainage valve
14 Expansion vessel (DHW circuit)
15 Tank hydroblock
16 Shunt pump (DHW circuit)
17 Shunt pump (Heating circuit)
18 Return end hydroblock
19 Plate heat exchanger (DHW circuit)
20 3-way valve
21 Condensate receiver tank
22 Fan
23 Heat exchanger (Heating circuit)
24 Calorifier tank
25 Ignition/ionization electrode
26 Expansion vessel (Heating circuit)
27 Air intake
T001961-D
2
19
18
17
16
15
20
21
22
23
24
25
26
3
4
5
6
7
8
9
10
11
12
1
1413
27
MCA 25/28 BIC 3. Description
15/06/12 - 300022162-001-01 10

3.3 Control panel
3.3.1. Description of the keys
ATemperature setting key (heating, DHW, swimming pool)
BOperating mode selection key
CDHW override key
DKey to access the parameters reserved for the installer
EKeys on which the function varies as and when selections
are made
FRotary setting button:
4Turn the rotary button to scroll through the menus or
modify a value
4Press the rotary button to access the selected menu
or confirm a value modification
A000866-A
bar
STD t
0 2 4 6 8 10 12 14 16 18 22 2420
pb
AUTO
x
c
r
j
M
gm
A
B
C
DEF
('
3. Description MCA 25/28 BIC
11 15/06/12 - 300022162-001-01

3.3.2. Description of the display
nKey functions
>Access to the various menus
(Used to scroll through the menus
'Used to scroll through the parameters
?The symbol is displayed when help is available
fUsed to display the curve of the parameter selected
STD Reset of the time programmes
bSelection of comfort mode or selection of the days to be
programmed
vSelection of reduced mode or deselection of the days to
be programmed
jBack to the previous level
ESC Back to the previous level without saving the
modifications made
tManual reset
nFlame output level
C002705-A
The whole symbol flashes: The burner starts up but the
flame is not yet present
C002704-A
Part of the symbol flashes: Output is increasing
C002703-A
Steady symbol: The required output has been reached
C002702-A
Part of the symbol flashes: Output is dropping
bar r
STD
('t
0 2 4 6 8 10 12 14 16 18 22 2420
C002696-A
pb
AUTO
x c
r
j
L
gm
bar
STD t
0 2 4 6 8 10 12 14 16 18 22 2420
C002701-B
pb
AUTO
x c
r
j
M
gm
MCA 25/28 BIC 3. Description
15/06/12 - 300022162-001-01 12

nSolar (If connected)
uThe solar load pump is running
L000200-A
The top part of the tank is reheated to the tank set point
L000201-A
The entire tank is reheated to the tank set point
L000198-A
The entire tank is reheated to the solar tank set point
L000199-A
The tank is not loaded - Presence of the solar control
system
nOperating modes
pSummer mode: The heating is off. Domestic hot water
continues to be produced
bWINTER mode: Heating and domestic hot water working
AUTO Operation in automatic mode according to the timer
programme
xComfort mode: The symbol is displayed when a DAY
override (comfort) is activated
4Flashing symbol: Temporary override
4Steady symbol: Permanent override
mReduced mode: The symbol is displayed when a NIGHT
override (reduced) is activated
4Flashing symbol: Temporary override
4Steady symbol: Permanent override
gHoliday mode: The symbol is displayed when a HOLIDAY
override (antifreeze) is activated
4Flashing symbol: Holiday mode programmed
4Steady symbol: Holiday mode active
mManual mode
bar
STD t
0 2 4 6 8 10 12 14 16 18 22 2420
L000197-A
pb
AUTO
x c
r
j
M
gm
bar
STD t
0 2 4 6 8 10 12 14 16 18 22 2420
C002697-B
pb
AUTO
x c
r
j
M
gm
bar
STD t
0 2 4 6 8 10 12 14 16 18 22 2420
C002698-B
pb
AUTO
x c
r
j
M
gm
3. Description MCA 25/28 BIC
13 15/06/12 - 300022162-001-01

nSystem pressure
bar Pressure indicator: The symbol is displayed when a water
pressure sensor is connected.
4Flashing symbol: The water pressure is insufficient.
4Steady symbol: The water pressure is sufficient.
lWater pressure level
4R : 0,9 to 1,1 bar
4E : 1,2 to 1,5 bar
4Z : 1,6 to 1,9 bar
4A : 2,0 to 2,3 bar
4l : > 2,4 bar
nDomestic Hot Water override
A bar is displayed when a DHW override is activated:
4Flashing bar: Temporary override
4Steady bar: Permanent override
nOther information
rThe symbol is displayed when domestic hot water
production is running.
wValve indicator: The symbol is displayed when a 3-way
valve is connected.
4x : 3-way valve opens
4c : 3-way valve closes
MThe symbol is displayed when the pump is operating.
Name of the circuit for which the parameters are
displayed.
bar
STD t
0 2 4 6 8 10 12 14 16 18 22 2420
C002708-A
pb
AUTO
x c
r
j
M
gm
bar
STD t
0 2 4 6 8 10 12 14 16 18 22 2420
C002707-A
pb
AUTO
x c
r
j
M
gm
bar
STD t
0 2 4 6 8 10 12 14 16 18 22 2420
C002699-B
pb
AUTO
x c
r
j
M
gm
MCA 25/28 BIC 3. Description
15/06/12 - 300022162-001-01 14

3.3.3. Browsing in the menus
1. To select the desired menu, turn the rotary button.
2. To access the menu, press the rotary button.
To go back to the previous display, press the key j.
3. To select the desired parameter, turn the rotary button.
4. To modify the parameter, press the rotary button.
To go back to the previous display, press the key j.
5. To modify the parameter, turn the rotary button.
6. To confirm, press the rotary button.
To cancel, press key h.
7. To go back to the main display, press key j2 times.
It is possible to use the ( and ' keys instead of the rotary
button.
bar
1
1
2
2
r
c
STD
('t
v
0 2 4 6 8 10 12 14 16 18 22 2420
pb
AUTO
x c
r
j
L
gm
#MEASURES
#CHOICE TIME PROG.
#TIME PROGRAM
#SETTING
#TIME .DAY
a
C002220-B-04
bar
1
1
2
2
r
c
STD
('t
v
0 2 4 6 8 10 12 14 16 18 22 2420
pb
AUTO
x c
r
j
L
gm
CURRENT PROG.B
CURRENT PROG.C
P2
P3
a
C002221-C-04
bar
1
1
2
2
r
c
STD
('t
v
0 2 4 6 8 10 12 14 16 18 22 2420
pb
AUTO
x c
r
j
L
gm
CURRENT PROG.C
"Choice of the timeprogram
applied C"
P4
a
C002222-C-04
bar
1
1
2
2
r
c
STD
('t
v
0 2 4 6 8 10 12 14 16 18 22 2420
pb
AUTO
x c
r
j
M
gm
LUNDI 11:45
C002224-D-04
2x
3. Description MCA 25/28 BIC
15 15/06/12 - 300022162-001-01

4 Operating the boiler
4.1 Commissioning the boiler
1. Check the water pressure in the installation shown on the control
panel display.
If the water pressure is lower than 0,8 bar, more water
should be added. If necessary, top up the water level in the
heating system (recommended hydraulic pressure
between 1,5 and 2,0 bar).
¼ See chapter: "Filling the system", page 27
2. Open the gas valve on the boiler.
3. Turn on the boiler using the on/off switch.
4. The first time the boiler is powered up, the #LANGUAGE menu is
displayed. Select the desired language by turning the rotary
button.
5. To confirm, press the rotary button.
The boiler will begin an automatic venting-programme (which lasts
approx. 3 minutes) and will do this every time the power supply is
isolated. If there is a problem, the error is displayed on the screen.
4.2 Reading out measured values
The various values measured by the appliance are displayed in the
#MEASURES menu.
1. To access user level: Press the > key.
2. Select the menu #MEASURES.
4Turn the rotary button to scroll through the menus or
modify a value.
4Press the rotary button to access the selected menu
or confirm a value modification.
¼ For a detailed explanation of menu browsing, refer
to the chapter: "Browsing in the menus", page 15.
C002366-B
Français - Deutsch - English -
Italiano - Espanol - Nederlands
- Pycck - Polski - Türk -
bar
1
1
2
2
r
c
STD
('t
v
0 2 4 6 8 10 12 14 16 18 22 2420
pbx
c
r
gm
ÿ
LANGUE FRANCAIS
C002286-C
bar
1
1
2
2
r
c
STD
('t
v
0 2 4 6 8 10 12 14 16 18 22 2420
pb
AUTO
x c
r
j
M
gm
SUNDAY 11:45
C002219-D-04
MCA 25/28 BIC 4. Operating the boiler
15/06/12 - 300022162-001-01 16

User level - Menu #MEASURES
Parameter Description Unit
OUTSIDE TEMP. Outside temperature °C
ROOMTEMP. A (1) Room temperature of circuit A °C
ROOMTEMP. B (1) Room temperature of circuit B °C
ROOMTEMP. C (1) Room temperature of circuit C °C
BOILER TEMP. Water temperature in the boiler °C
PRESSURE Water pressure in the installation bar
WATER TEMP. (1) Water temperature in the DHW tank °C
INST DWH TEMP. (1) Instant hot water temperature °C
STOR.TANK.TEMP (1) Water temperature in the storage tank °C
DCW TEMPERATURE Domestic cold water temperature °C
SWIMMING P.T.B (1) Water temperature of the swimming pool on circuit B °C
SWIMMING P.T.C (1) Water temperature of the swimming pool on circuit C °C
OUTLET TEMP. B (1) Temperature of the flow water in circuit B °C
OUTLET TEMP. C (1) Temperature of the flow water in circuit C °C
SYSTEM TEMP. (1) Temperature of the system flow water if multi-generator °C
T.DHW BOTTOM (1) Water temperature in the bottom of the DHW tank °C
TEMP.TANK AUX (1) Water temperature in the second DHW tank connected to the AUX circuit °C
DHW A TEMP. (1) Water temperature in the second DHW tank connected to circuit A °C
BACK TEMP Temperature of the boiler return water °C
WIND SPEED Fan rotation speed rpm
POWER Instantaneous boiler output (0%: Burner off or running at minimum output) %
CURRENT (µA) Ionization current µA
NB IMPULS. Number of burner starts (not restartable)
The meter is incremented by 8 every 8 start-ups
RUNTIME Number of burner operation hours (not restartable)
The meter is incremented by 2 every 2 hours
h
IN 0-10V (1) Voltage at input 0-10 V V
SEQUENCE Control system sequence
CTRL Software control number
(1) The parameter is only displayed for the options, circuits or sensors actually connected.
4. Operating the boiler MCA 25/28 BIC
17 15/06/12 - 300022162-001-01

4.3 Changing the settings
4.3.1. Setting the set point temperatures
To set the various heating, DHW and swimming pool temperatures,
proceed as follows:
1. Press the C key.
2. To select the desired parameter, turn the rotary button.
3. To modify the parameter, press the rotary button.
To go back to the previous display, press the key j.
4. To modify the parameter, turn the rotary button.
5. To confirm, press the rotary button.
To cancel, press key h.
Menu C
Parameter Adjustment range Description Factory setting
DAY TEMP. A 5 to 30 °C Desired room temperature in comfort periods on circuit A 20 °C
NIGHT TEMP. A 5 to 30 °C Desired room temperature in reduced periods on circuit A 16 °C
DAY TEMP. B (1) 5 to 30 °C Desired room temperature in comfort periods on circuit B 20 °C
NIGHT TEMP. B (1) 5 to 30 °C Desired room temperature in reduced periods on circuit B 16 °C
DAY TEMP. C (1) 5 to 30 °C Desired room temperature in comfort periods on circuit C 20 °C
NIGHT TEMP. C (1) 5 to 30 °C Desired room temperature in reduced periods on circuit C 16 °C
WATER TEMP. (1) 40 to 65 °C Desired domestic hot water temperature in the DHW circuit 55 °C
WATER T.NIGHT(1)
(2)
10 to 80 °C Set tank temperature, night programme 10 °C
TEMP.TANK AUX (1) 10 to 80 °C Desired domestic hot water temperature in the auxiliary circuit 55 °C
AUX.TANK
T.NIGHT(1)(2)
10 to 80 °C Set tank temperature, night programme 10 °C
DHW A TEMP. (1) 10 to 80 °C Desired domestic hot water temperature in circuit A 55 °C
A.TANK T.NIGHT(1)
(2)
10 to 80 °C Set tank temperature, night programme 10 °C
SWIMMING P.T.B (1) 5 to 39 °C Desired temperature for swimming pool B 20 °C
SWIMMING P.T.C (1) 5 to 39 °C Desired temperature for swimming pool C 20 °C
(1) The parameter is only displayed for the options, circuits or sensors actually connected.
(2) The parameter is only displayed if INSTALLATION parameter is set to EXTENDED
MODE
C002266-A
MCA 25/28 BIC 4. Operating the boiler
15/06/12 - 300022162-001-01 18

4.3.2. Selecting the operating mode
To select an operating mode, proceed as follows:
1. Press the MODE key.
2. To select the desired parameter, turn the rotary button.
3. To modify the parameter, press the rotary button.
To go back to the previous display, press the key j.
4. To modify the parameter, turn the rotary button.
5. To confirm, press the rotary button.
To cancel, press key h.
Menu MODE
Parameter Adjustment range Description Factory setting
AUTOMATIQUE The comfort ranges are determined by the timer programme.
DAY 7/7, xx:xx Comfort mode is forced until the time indicated or all the time (7/7). Present time + 1
hour
NIGHT 7/7, xx:xx Reduced mode is forced until the time indicated or all the time
(7/7).
Present time + 1
hour
HOLIDAYS 7/7, 1 to 365 The antifreeze mode is active on all boiler circuits.
Number of days' holiday: xx (1)
heating OFF: xx:xx (1)
Restarting: xx:xx (1)
Present date + 1
day
SUMMER The heating is off.
Domestic hot water continues to be produced.
MANUEL The generator operates according to the set point setting. All of
the pumps operate. Option of setting the set point by simply
turning the rotary button.
FORCE AUTO (2) YES / NO An operating mode override is activated on the remote control
(option).
To force all circuits to run on AUTOMATIQUE mode, select
YES.
(1) The start and end days and the number of days are calculated in relation to each other.
(2) The parameter is only displayed if a room sensor is connected.
MODE
C002267-A
4. Operating the boiler MCA 25/28 BIC
19 15/06/12 - 300022162-001-01