DE DIETRICH MCA 25, MCA 28 BIC User Manual

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Ireland

Innovens

Wall-hung gas condensing boilers

MCA 25/28 BIC

User Guide

300024163-001-B

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

2 Safety instructions and recommendations ..............................................7

2.1 Safety instructions ...............................................7

2.2 Recommendations ................................................8

3 Description ..................................................................................................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 ..........................................14

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

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Contents

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 .............................28

5.5 Draining the installation .....................................30

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

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MCA 25/28 BIC

1 Introduction

1.1 Symbols used

1. Introduction

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.

1.2 Abbreviations

CAUTION

Risk of material damage.

Signals important information.

¼ Signals a referral to other instructions or other pages in the instructions.

4 3CE: Collective conduit for sealed boiler

4 DHW: Domestic hot water

4 Interscenario switch: Home automation switch that can be used

to centralise and control several scenarios

4 Hi: Lower heating value LHV (Nett)

4 Hs: Higher heating value HHV (Gross)

4 IOBL: Carrier current home automation bus

4 PPS: Polypropylene hardly inflammable

4 PCU: Primary Control Unit - PCB for managing burner operation

4 PSU: Parameter Storage Unit - Parameter storage for PCBs

PCU and SU

4 SCU: Secondary Control Unit - control panel PCB

4 SU: Safety Unit - Safety PCB

4 3WV: 3-way valve

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1. Introduction

1.3 General

MCA 25/28 BIC

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:

4 Failure to abide by the instructions on using the appliance.

4 Faulty or insufficient maintenance of the appliance.

4 Failure 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:

4 Read and follow the instructions given in the manuals provided

with the appliance.

4 Carry out installation in compliance with the prevailing legislation

and standards.

4 Perform the initial start up and carry out any checks necessary.

4 Explain the installation to the user.

4 If a maintenance is necessary, warn the user of the obligation to

check the appliance and maintain it in good working order.

4 Give 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:

4 Read and follow the instructions given in the manuals provided

with the appliance.

4 Call on qualified professionals to carry out installation and initial

start up.

4 Get your fitter to explain your installation to you.

4 Have the required checks and services done.

4 Keep the instruction manuals in good condition close to the

appliance.

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MCA 25/28 BIC 1. Introduction

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

NOx classification

Type of connection Chimney: B23 , B

PIN 0063BT3444

5 (EN 297 pr A3, EN 656)

Flue gas outlet: C13 , C33, C43, C53, C63, C83 , C

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2. Safety instructions and recommendations MCA 25/28 BIC

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:

4 The temperature of the flue gas conduits may exceed

60°C.

4 The temperature of the radiators may reach 85°C.

4 The temperature of the domestic hot water may reach

65°C.

CAUTION

Do not neglect to service the appliance: 4 For completely safe and optimum operation, you

must have your boiler regularly serviced by an approved installer.

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MCA 25/28 BIC 2. Safety instructions and recommendations

2.2 Recommendations

WARNING

Only qualified professionals are authorised to work on the appliance and the installation.

4 Regularly check the water pressure in the installation (minimum

pressure 0,8 bar, recommended pressure between 1,5 and 2,0 bar).

4 Keep the appliance accessible at all times.

4 Never 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.

4 The appliance should be on Summer or Antrifreeze mode rather

than switched off to guarantee the following functions:

- Anti blocking of pumps

- Frost protection

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3. Description

3 Description

3.1 Operating principle

MCA 25/28 BIC

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 (selfcleans once every 76 hours).

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T001961-D

14 13

MCA 25/28 BIC 3. Description

3.2 Main parts

Flue gas discharge pipe

Casing/air box

Flue gas measuring point

Mixer pipe

Heating flow hose

Air intake silencer

Box for the control PCBs

Combined venturi and gas valve unit

Flow end hydrobloc

Safety valve outlet pipe

Siphon

Control panel

Tank drainage valve

Expansion vessel (DHW circuit)

Tank hydrobloc

Shunt pump (DHW circuit)

Shunt pump (Heating circuit)

Return end hydrobloc

Plate heat exchanger (DHW circuit)

3-way valve

Condensate receiver tank

Fan

Heat exchanger (Heating circuit)

Calorifier tank

Ignition/ionization electrode

Expansion vessel (Heating circuit)

Air intake

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A000866-A

bar

STD

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

(

3. Description MCA 25/28 BIC

3.3 Control panel

3.3.1. Description of the keys

Temperature setting key (heating, DHW, swimming pool)

Operating mode selection key

DHW override key

Key to access the parameters reserved for the installer

Keys on which the function varies as and when selections are made

Rotary setting button:

4 Turn the rotary button to scroll through the menus or

modify a value

4 Press the rotary button to access the menu selected

or confirm a value modification

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C002705-A

C002704-A

C002703-A

C002702-A

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

C002696-A

AUTO

bar

STD

0 2 4 6 8 10 12 14 16 18 22 2420

C002701-B

AUTO

MCA 25/28 BIC 3. Description

3.3.2. Description of the display

Key functions

> ( '

STD

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

Used to display the curve of the parameter selected

Reset of the time programmes

Selection of comfort mode or selection of the days to be programmed

Selection of reduced mode or deselection of the days to be programmed

ESC

Back to the previous level

Back to the previous level without saving the modifications made

Flame output level

Manual reset

The whole symbol flashes: The burner starts up but the flame is not yet present

Part of the symbol flashes: Output is increasing

Steady symbol: The required output has been reached

Part of the symbol flashes: Output is dropping

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bar

STD

0 2 4 6 8 10 12 14 16 18 22 2420

C002697-B

AUTO

bar

STD

0 2 4 6 8 10 12 14 16 18 22 2420

C002698-B

AUTO

bar

STD

0 2 4 6 8 10 12 14 16 18 22 2420

C002708-A

AUTO

3. Description MCA 25/28 BIC

Operating modes

AUTO

Summer mode: The heating is off. Domestic hot water continues to be produced

WINTER mode: Heating and domestic hot water working

Operation in automatic mode according to the timer programme

Comfort mode: The symbol is displayed when a DAY override (comfort) is activated

4 Flashing symbol: Temporary override

4 Steady symbol: Permanent override

Reduced mode: The symbol is displayed when a NIGHT override (reduced) is activated

4 Flashing symbol: Temporary override

4 Steady symbol: Permanent override

Holiday mode: The symbol is displayed when a HOLIDAY override (antifreeze) is activated

4 Flashing symbol: Holiday mode programmed

4 Steady symbol: Holiday mode active

System pressure

bar

Manual mode

Pressure indicator: The symbol is displayed when a water pressure sensor is connected.

4 Flashing symbol: The quantity of water is insufficient.

4 Steady symbol: The quantity of water is sufficient.

Water pressure level

4 R : 0,9 to 1,1 bar 4 E : 1,2 to 1,5 bar 4 Z : 1,6 to 1,9 bar 4 A : 2,0 to 2,3 bar 4 l : > 2,4 bar

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bar

STD

0 2 4 6 8 10 12 14 16 18 22 2420

C002707-A

AUTO

bar

STD

0 2 4 6 8 10 12 14 16 18 22 2420

C002699-B

AUTO

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

#MEASURES

#CHOICE TIME PROG.

#TIME PROGRAM #SETTING #TIME .DAY

C002220-B-04

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

CURRENT PROG.B

CURRENT PROG.C

C002221-C-04

MCA 25/28 BIC

Domestic Hot Water override

A bar is displayed when a DHW override is activated:

4 Flashing bar: Temporary override

4 Steady bar: Permanent override

Other information

3. Description

The symbol is displayed when domestic hot water production is running.

Valve indicator: The symbol is displayed when a 3-way valve is connected.

4 x : 3-way valve opens 4 c : 3-way valve closes

The symbol is displayed when the pump is operating.

Name of the circuit for which the parameters are displayed.

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.

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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.

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

CURRENT PROG.C

"Choice of the timeprogram applied C"

C002222-C-04

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

LUNDI 11:45

C002224-D-04

3. Description MCA 25/28 BIC

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.

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C002366-B

Français - Deutsch - English Italiano - Espanol - Nederlands

- Pycck - Polski - Türk -

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

LANGUE FRANCAIS

C002286-C

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

SUNDAY 11:45

C002219-D-04

MCA 25/28 BIC 4. Operating the boiler

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).

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.

4.2 Reading out measured values

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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.

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.

Turn the rotary button to scroll through the menus or modify a value.

4 Press the rotary button to access the menu selected

or confirm a value modification.

For a detailed explanation of menu browsing, refer

to the chapter: "Browsing in the menus", page 14.

4. Operating the boiler MCA 25/28 BIC

User level - #MEASURES menu

Parameter Description Unit

OUTSIDE TEMP.

ROOMTEMP. A

ROOMTEMP. B

ROOMTEMP. C

(1)

BOILER TEMP.

PRESSURE

WATER TEMP.

(1)

INST DWH TEMP.

STOR.TANK.TEMP

DCW TEMPERATURE

SWIMMING P.T.B

SWIMMING P.T.C

OUTLET TEMP. B

OUTLET TEMP. C

SYSTEM TEMP.

T.DHW BOTTOM

TEMP.TANK AUX

DHW A TEMP.

(1)

Outside temperature °C

Room temperature of circuit A °C

Room temperature of circuit B °C

Room temperature of circuit C °C

Water temperature in the boiler °C

Water pressure in the installation bar

Water temperature in the DHW tank °C

(1)

Instant hot water temperature °C

(1)

Water temperature in the storage tank °C

Domestic cold water temperature °C

(1)

Water temperature of the swimming pool on circuit B °C

(1)

Water temperature of the swimming pool on circuit C °C

(1)

Temperature of the flow water in circuit B °C

(1)

Temperature of the flow water in circuit C °C

(1)

Temperature of the system flow water if multi-generator °C

(1)

Water temperature in the bottom of the DHW tank °C

(1)

Water temperature in the second DHW tank connected to the AUX circuit °C

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 start-ups (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

IN 0-10V

(1)

SEQUENCE

CTRL Software control number

(1) The parameter is only displayed for the options, circuits or sensors actually connected.

Voltage at input 0-10 V V

Control system sequence

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MODE

C002266-A

MCA 25/28 BIC 4. Operating the boiler

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

Menu C

Parameter Adjustment range Description Factory setting

DAY TEMP. A

NIGHT TEMP. A

DAY TEMP. B

NIGHT TEMP. B

(1)

DAY TEMP. C

NIGHT TEMP. C

(1)

WATER TEMP.

TEMP.TANK AUX

(1)

DHW A TEMP.

SWIMMING P.T.B

(1)

SWIMMING P.T.C

(1)

(1) The parameter is only displayed for the options, circuits or sensors actually connected.

5 to 30 °C Desired room temperature in comfort periods on circuit A 20 °C

5 to 30 °C Desired room temperature in reduced periods on circuit A 16 °C

(1)

5 to 30 °C Desired room temperature in comfort periods on circuit B 20 °C

5 to 30 °C Desired room temperature in reduced periods on circuit B 16 °C

(1)

5 to 30 °C Desired room temperature in comfort periods on circuit C 20 °C

5 to 30 °C Desired room temperature in reduced periods on circuit C 16 °C

(1)

40 to 65 °C Desired domestic hot water temperature in the DHW circuit 55 °C

10 to 80 °C Desired domestic hot water temperature in the auxiliary circuit 55 °C

(1)

10 to 80 °C Desired domestic hot water temperature in circuit A 55 °C

5 to 39 °C Desired temperature for swimming pool B 20 °C

5 to 39 °C Desired temperature for swimming pool C 20 °C

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MODE

C002267-A

4. Operating the boiler MCA 25/28 BIC

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

DAY

NIGHT

HOLIDAYS

SUMMER

MANUEL

FORCE AUTO

(1) The start and end days and the number of days are calculated in relation to each other.

7/7, xx:xx Comfort mode is forced until the time indicated or all the time (7/7). Present time + 1

7/7, xx:xx Reduced mode is forced until the time indicated or all the time (7/7). Present time + 1

7/7, 1 to 365 The antifreeze mode is active on all boiler circuits.

YES / NO An operating mode override is activated on the remote control

The comfort ranges are determined by the timer programme.

Number of days' holiday: xx heating OFF: xx:xx Restarting: xx:xx

The heating is off. Domestic hot water continues to be produced.

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.

(option). To force all circuits to run on AUTOMATIQUE mode, select YES.

(1)

hour

Present date + 1 day

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MODE

C002268-A

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

SUNDAY 11:45

C002219-D-04

MCA 25/28 BIC 4. Operating the boiler

4.3.3. Forcing domestic hot water production

To force domestic hot water production, proceed as follows:

1. Press the r 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 r

Parameter Description Factory setting

AUTOMATIQUE

COMFORT

The domestic hot water comfort ranges are determined by the timer programme.

Domestic hot water comfort mode is forced until the time indicated or all the time (7/7). Present time + 1 hour

4.3.4. Setting the contrast and lighting on the

display

1. To access user level: Press the > key.

2. Select the menu #SETTING.

Turn the rotary button to scroll through the menus or modify a value.

4 Press the rotary button to access the menu selected

or confirm a value modification.

For a detailed explanation of menu browsing, refer

to the chapter: "Browsing in the menus", page 14.

3. To set the following parameters:

User level - Menu #SETTING

Parameter Adjustment range Description Factory setting Customer setting

CONTRAST DISP.

BACK LIGHT COMFORT

ECO

Adjusting the display contrast.

The screen is illuminated continuously in daytime periods.

The screen is illuminated for 2 minutes whenever pressed.

ECO

31/08/2011 - 300024163-001-B

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

SUNDAY 11:45

C002219-D-04

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

SUNDAY 11:45

C002219-D-04

4. Operating the boiler MCA 25/28 BIC

4.3.5. Setting the time and date

1. To access user level: Press the > key.

2. Select the menu #TIME .DAY.

4 Turn the rotary button to scroll through the menus or

modify a value.

4 Press the rotary button to access the menu selected

or confirm a value modification.

For a detailed explanation of menu browsing, refer

to the chapter: "Browsing in the menus", page 14.

3. To set the following parameters:

User level - Menu #TIME .DAY

Parameter Adjustment range Description Factory setting Customer setting

HOURS

MINUTE

DAY

DATE

MONTH

YEAR

SUM. TIME: AUTO

0 to 23 Hours setting

0 to 59 Minutes setting

Monday to Sunday Setting the day of the week

1 to 31 Day setting

January to December Month setting

2008 to 2099 Year setting

automatic switch to summer time on the last Sunday in March and back to winter time on the last Sunday in October.

MANU

for countries where the time change is done on other dates or is not in use.

AUTO

4.3.6. Selecting a timer programme

1. To access user level: Press the > key.

2. Select the menu #CHOICE TIME PROG..

Turn the rotary button to scroll through the menus or modify a value.

4 Press the rotary button to access the menu selected

or confirm a value modification.

For a detailed explanation of menu browsing, refer

to the chapter: "Browsing in the menus", page 14.

3. To select the desired parameter.

User level - Menu

Parameter Adjustment range Description

CURRENT PROG.A

CURRENT PROG.B

CURRENT PROG.C

#CHOICE TIME PROG.

P1 / P2 / P3 / P4 Comfort programme activated

(Circuit A)

P1 / P2 / P3 / P4 Comfort programme activated

(Circuit B)

P1 / P2 / P3 / P4 Comfort programme activated

(Circuit C)

31/08/2011 - 300024163-001-B

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

SUNDAY 11:45

C002219-D-04

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

PROG P2 C Mo Tu We Th Fr Sa Su "Display of the timeprogram. To continuepush on the button"

C002228-B-04

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

PROG P2 C Mo Tu

We Th Fr Sa Su

"Select the days to program"

C002229-C-04

MCA 25/28 BIC

4. Operating the boiler

4. Assign the desired timer programme (P1 to P4) to the circuit with the rotary button.

4.3.7. Customising a timer programme

1. To access user level: Press the > key.

2. Select the menu #TIME PROGRAM.

4 Turn the rotary button to scroll through the menus or

modify a value.

4 Press the rotary button to access the menu selected

or confirm a value modification.

For a detailed explanation of menu browsing, refer

to the chapter: "Browsing in the menus", page 14.

3. To select the desired parameter.

User level - Menu #TIME PROGRAM

Parameter Time schedule Description

TIME PROG.A PROG P2 A

PROG P3 A PROG P4 A

TIME PROG.B PROG P2 B

PROG P3 B PROG P4 B

TIME PROG.C PROG P2 C

PROG P3 C PROG P4 C

TIME PROG.DHW

TIME PROG.AUX

Timer programme for circuit A

Timer programme for circuit B

Timer programme for circuit C

DHW circuit timer programme

Auxiliary circuit timer programme

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4. To select a timer programme to be modified.

To select to days for which the timer programme is to be

5. modified: Turn the rotary button to the left until you reach the day desired. To confirm, press the rotary button.

6.b : Day selection Press key b / v until the symbol b is displayed. Turn the rotary button to the right to select the day(s) desired.

: Cancelling the day selection

Press key b / v until the symbol v is displayed. Turn the rotary button to the right to cancel selection of the relevant

day(s).

7. When the days desired for the programme have been selected, press the rotary button to confirm.

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

PROG P2 C Mo Tu

We Th Fr Sa Su

Set the time program.

C002230-E-04

06:00

4. Operating the boiler MCA 25/28 BIC

To define the timer ranges for the comfort mode and reduced

8. mode: Turn the rotary button to the left until 0:00 is displayed. The first segment of the graphic bar for the timer programme flashes.

9.b : Comfort mode selection Press key b / v until the symbol b is displayed. To select a comfort time range, turn the rotary button to the right.

: Reduced mode selection

Press key b / v until the symbol v is displayed. To select a reduced time range, turn the rotary button to the right.

10.When the times for the comfort mode have been selected, press the rotary button to confirm.

User level - Menu #TIME PROGRAM

TIME PROG.A

TIME PROG.B

TIME PROG.C

TIME PROG.DHW

Day Comfort periods / Filling enabled:

P2 _______________ P3 _______________ P4 _______________

_______________

Monday 6:00 to 22:00

Tuesday 6:00 to 22:00

Wednesday 6:00 to 22:00

Thursday 6:00 to 22:00

Friday 6:00 to 22:00

Saturday 6:00 to 22:00

Sunday 6:00 to 22:00

Monday 6:00 to 22:00

Tuesday 6:00 to 22:00

Wednesday 6:00 to 22:00

Thursday 6:00 to 22:00

Friday 6:00 to 22:00

Saturday 6:00 to 22:00

Sunday 6:00 to 22:00

Monday 6:00 to 22:00

Tuesday 6:00 to 22:00

Wednesday 6:00 to 22:00

Thursday 6:00 to 22:00

Friday 6:00 to 22:00

Saturday 6:00 to 22:00

Sunday 6:00 to 22:00

Monday

Tuesday

Wednesday

Thursday

Friday

Saturday

Sunday

31/08/2011 - 300024163-001-B

MCA 25/28 BIC

User level - Menu #TIME PROGRAM

4. Operating the boiler

TIME PROG.AUX

Day Comfort periods / Filling enabled:

P1 _______________

Monday

Tuesday

Wednesday

Thursday

Friday

Saturday

Sunday

4.4 Installation shutdown

4.5 Frost protection

P2 _______________ P3 _______________ P4 _______________

CAUTION

Do not switch off the boiler. If the central heating system is not used for a long period, we recommend activating the HOLIDAYS mode.

When the heating water temperature in the boiler falls by too much, the integrated protection system in the boiler starts up. This protection functions as follows:

4 If the water temperature is lower than 7°C, the heating pump starts

up.

4 If the water temperature is lower than 4°C, the boiler starts up.

4 If the water temperature is higher than 10°C, the boiler shuts down

and the heating pump continues to run for a short time.

4 If the water temperature in the storage tank is less than 7°C, it is

reheated to its set point.

CAUTION

4 The anitfreeze protection does not function if the

boiler is switched off.

4 The integrated protection system only protects the

boiler, not the installation. To protect the installation, set the appliance to HOLIDAYS mode.

The HOLIDAYS mode protects:

4 The installation if the outside temperature is lower than 3°C

(factory setting).

4 The room temperature if a remote control is connected and the

room temperature is lower than 6 °C (factory setting).

4 The domestic hot water tank if the tank temperature is lower

than 4 °C (the water is reheated to 10 °C).

31/08/2011 - 300024163-001-B

4. Operating the boiler MCA 25/28 BIC

To configure the holidays mode: ¼ See chapter: "Selecting the operating mode", page 19.

31/08/2011 - 300024163-001-B

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

SUNDAY 11:45

TEMP. : 68°

PCU COM.FAIL D27

C002302-D-04

T001507-B

MCA 25/28 BIC

5 Checking and maintenance

5.1 General instructions

The boiler does not require a lot of maintenance. Nevertheless, we recommend having the boiler inspected and serviced at regular intervals.

4 Maintenance and cleaning of the boiler must be carried out at least

once a year by a qualified technician.

4 Have the flues swept at least once a year or more, depending on

the regulations in force in your country.

CAUTION

4 Maintenance operations must be done by a qualified

engineer.

4 We recommend taking out a maintenance contract.

4 Only original spare parts must be used.

5. Checking and maintenance

5.2 Periodic checks

The boiler displays a message whenever maintenance is necessary.

1. When the message, REVISION, is displayed, press ? to display the installer's telephone number.

2. Contact the fitter.

3. Have the required checks and services done.

4 Check the water pressure in the installation.

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.

31/08/2011 - 300024163-001-B

4 Carry out a visual check for the presence of any water leaks.

T000181-B

T000185-A

T001620-A

5. Checking and maintenance MCA 25/28 BIC

4 Open and close the radiator valves several times a year (this

prevents the valves from seizing up).

4 Clean the outside of the boiler using a damp cloth and a light

detergent.

CAUTION

Only a qualified professional is authorised to clean the inside of the boiler.

5.3 Filling the system

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).

2. Open the valves on all radiators connected to the heating system.

3. Set the heating set point to as low a temperature as possible.

4. Wait until the temperature drops below 40°C and the radiators seem cold before filling the central heating system.

5. Open the cold water inlet and heating outlet valves.

31/08/2011 - 300024163-001-B

T001618-A

T001619-A

2 bar

T000181-B

T000184-A

MCA 25/28 BIC

5. Checking and maintenance

6. Open the disconnector valves.

7. Close the disconnector valves when the manometer indicates a pressure of 2 bar.

When water is added, air gets into the heating system. Degas the installation. After the air has been vented, the water pressure can drop below the required level. Check the water pressure in the heating system. If the water pressure is lower than 0,8 bar, more water should be added.

8. After filling the installation, switch the boiler on.

5.4 Bleeding the heating system

It is essential that you bleed any air in the calorifier, the conduits or the taps to prevent the annoying noises likely to be produced during heating or when tapping water. To do this, proceed as follows:

1. Open the valves on all radiators connected to the heating system.

2. Set the heating set point to as high a temperature as possible.

3. Wait until the radiators are hot.

Filling and bleeding the installation 2 times a year should be sufficient to obtain an adequate hydraulic pressure. If it is often necessary to top up the installation with water, contact your fitter.

31/08/2011 - 300024163-001-B

4. Switch the boiler off.

T000185-A

T000854-A

T000217-A

5. Checking and maintenance MCA 25/28 BIC

5. Wait around 10 minutes until the radiators are cold.

6. Bleed the radiators. Start with the lower floors.

7. Open the bleed connection using the bleed key provided whilst keeping a rag pressed against the connection.

31/08/2011 - 300024163-001-B

T000218-A

T000181-B

T000185-A

MCA 25/28 BIC

5. Checking and maintenance

8. Wait until water comes out of the bleed valve and then close the bleed connection.

CAUTION

The water may still be hot.

9. Switch on the boiler. A vent cycle of a duration of around 3 minutes is carried out automatically.

10.After venting, check whether the pressure in the installation is still sufficient.

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).

See chapter: "Filling the system", page 27

11.Set the heating set point.

5.5 Draining the installation

It may become necessary to empty the water from the heating system when the radiators have to be replaced, should there be a major water leak or a risk of frost. To do this, proceed as follows:

1. Open the valves on all radiators connected to the heating system.

2. Switch off the boiler electrical power supply.

3. Wait around 10 minutes until the radiators are cold.

31/08/2011 - 300024163-001-B

T000858-A

5. Checking and maintenance MCA 25/28 BIC

4. Connect an evacuation hose to the plug located at the lowest level. Place the end of the hose in a discharge sump or in a place where the water discharged from the valve can not do any damage.

5. Open the filling/draw-off valve on the heating system. Vent the heating installation.

WARNING

The water may still be hot.

6. When no more water comes out of the drainage plug, close the drainage valve.

31/08/2011 - 300024163-001-B

MCA 25/28 BIC 6. Troubleshooting

6 Troubleshooting

6.1 Anti-hunting

When the boiler is in Anti-short-cycle operating mode, the symbol ? flashes.

1. Press the "?" key. The message Operation assured when the restart temperature will be reached is displayed. When the restart temperature is reached, operation will be guaranteed.

This message is not an error message but an item of information.

6.2 Messages (Code type Bxx or Mxx)

In the case of failure, the control panel displays a message and a corresponding code.

1. Make a note of the code displayed. The code is important for the correct and rapid diagnosis of the type of failure and for any technical assistance that may be needed.

2. Switch the boiler off and switch back on. The boiler starts up again automatically when the reason for the blocking has been removed.

3. If the code is displayed again, correct the problem by following the instructions in the table below:

Code

Messages Description Checking / solution

B00 BL.PSU ERROR

B01 BL.MAX BOILER

B02 BL.HEATING

SPEED

The PSU PCB is incorrectly configured

Maximum flow temperature exceeded

The increase in flow temperature has exceeded its maximum limit

Parameter error on the PSU PCB

4 Contact the professional who takes care of maintenance of

The water flow in the installation is insufficient

4 Check the circulation (direction, pump, valves)

The water flow in the installation is insufficient

4 Check the circulation (direction, pump, valves)

4 Check the water pressure

Sensor error

the appliance

B07 BL.DT OUTL RET.

31/08/2011 - 300024163-001-B

Maximum difference between the flow and return temperature exceeded

4 Contact the professional who takes care of maintenance of

the appliance

The water flow in the installation is insufficient

4 Check the circulation (direction, pump, valves)

4 Check the water pressure

Sensor error

4 Contact the professional who takes care of maintenance of

the appliance

6. Troubleshooting MCA 25/28 BIC

Code Messages Description Checking / solution

B08 BL.RL OPEN

The RL inlet on the PCU PCB terminal block is open

Parameter error

4 Contact the professional who takes care of maintenance of

the appliance

Bad connection

4 Contact the professional who takes care of maintenance of

the appliance

B09 BL.INV. L/N

B10

BL.BL INPUT

B11

OPEN

4 Contact the professional who takes care of maintenance of the appliance

The BL inlet on the PCU PCB terminal block is open

The contact connected to the BL inlet is open

4 Contact the professional who takes care of maintenance of

the appliance

Parameter error

4 Contact the professional who takes care of maintenance of

the appliance

Bad connection

4 Contact the professional who takes care of maintenance of

the appliance

B13 BL. PCU COM

Communication error with the SCU PCB

Bad connection

4 Contact the professional who takes care of maintenance of

the appliance

SCU PCB not installed in the boiler

B14 BL.WATER MIS.

B15 BL.GAS PRESS

B16

BL.BAD SU

B17 BL.PCU ERROR

B18 BL.BAD PSU

B19 BL.NO CONFIG

B21 BL. COM SU

B22 BL.FLAME LOS

4 Contact the professional who takes care of maintenance of

the appliance

The water pressure is lower than 0,8 bar

Not enough water in the circuit

4 Top up the installation with water

Gas pressure too low Incorrect setting of the gas pressure switch on the SCU PCB

4 Check that the gas valve is fully opened

4 Contact the professional who takes care of maintenance of

the appliance

The SU PCB is not recognised Wrong SU PCB for this boiler

4 Contact the professional who takes care of maintenance of

the appliance

The parameters saved on the PCU PCB are impaired

Parameter error on the PCU PCB

4 Contact the professional who takes care of maintenance of

the appliance

The PSU PCB is not recognised Wrong PSU PCB for this boiler

4 Contact the professional who takes care of maintenance of

the appliance

The boiler has not been configured

The PSU PCB has been changed

4 Contact the professional who takes care of maintenance of

the appliance

Communication error between the PCU and SU PCBs

Bad connection

4 Contact the professional who takes care of maintenance of

the appliance

No flame during operation No ionization current

B25

BL.SU ERROR

Internal error on the SU PCB

4 Check that the gas valve is fully opened

4 Contact the professional who takes care of maintenance of

the appliance

4 Contact the professional who takes care of maintenance of

the appliance

31/08/2011 - 300024163-001-B

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

SUNDAY 11:45

TEMP. : 68°

PCU. COM. FAIL. D27

C002604-B-04

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

SUNDAY 11:45

TEMP. : 68°

PCU COM.FAIL D27

C002302-D-04

MCA 25/28 BIC

Code Messages Description Checking / solution

M04 REVISION

A service is required The date programmed for the service has been reached

4 If the symbol ? flashes, press key ?. The installer's contact

details are displayed.

4 Contact the professional who takes care of maintenance of

the appliance

M05 REVISION A

M06

REVISION B

M07 REVISION C

An A, B or C service is required The date programmed for the service has been reached

4 If the symbol ? flashes, press key ?. The installer's contact

details are displayed.

4 Contact the professional who takes care of maintenance of

the appliance

M20 DISGAS

A boiler vent cycle is underway Switching the boiler on

4 Wait 3 minutes

FL.DRY.B XX DAYS

FL.DRY.C XX DAYS

Floor drying is active XX DAYS = Number of days' floor

drying remaining.

Floor drying is underway. Heating on the circuits not concerned is shut down.

4 Contact the professional who takes care of maintenance of

the appliance

FL.DRY.B+C XX DAYS

M23 CHANGE OUTSI.S

The outside temperature sensor

Change the outside radio temperature sensor.

is defective.

STOP N XX

The shutdown is active XX = Number of the active

A shutdown is underway. The circuits selected for this stop are in Antifreeze mode during the period chosen.

shutdown

6. Troubleshooting

6.3 Faults (Code type Lxx or Dxx)

In the event of operational failure, the control panel flashes and displays an error message and a corresponding code.

1. Make a note of the code displayed. The code is important for the correct and rapid diagnosis of the type of failure and for any technical assistance that may be needed.

2. Press the t key. If the code is displayed again, switch off the boiler and then switch it back on.

3. Press the ? key. Follow the instructions displayed to solve the problem.

4. Consult the meaning of the codes in the table below:

31/08/2011 - 300024163-001-B

6. Troubleshooting MCA 25/28 BIC

Code Faults Cause

of the fault

L00 PSU FAIL

L01 PSU PARAM FAIL

L02 DEF.OUTLET S.

L03 DEF.OUTLET S.

L04 DEF.OUTLET S.

PCU PSU PCB not connected Bad connection

PCU The safety parameters are incorrect Bad connection

PCU The boiler flow sensor has short-

PCU The boiler flow sensor is on an open

PCU Boiler temp too low Bad connection

Description Checking / solution

PSU PCB faulty

4 Contact the professional who takes care of

maintenance of the appliance

PSU PCB faulty

4 Contact the professional who takes care of

maintenance of the appliance

Bad connection

circuited

Sensor fault

4 Contact the professional who takes care of

maintenance of the appliance

Bad connection

circuit

Sensor fault

4 Contact the professional who takes care of

maintenance of the appliance

Sensor fault

4 Contact the professional who takes care of

maintenance of the appliance

No water circulation

L05 STB OUTLET

L06 BACK S.FAILURE

L07 BACK S.FAILURE

L08 BACK S.FAILURE

4 Vent the air in the heating system

4 Check the circulation (direction, pump,

valves)

4 Check the water pressure

PCU Boiler temperature too high Bad connection

Sensor fault

4 Contact the professional who takes care of

maintenance of the appliance

No water circulation

4 Vent the air in the heating system

4 Check the circulation (direction, pump,

valves)

4 Check the water pressure

PCU The return temperature sensor has

short-circuited

Bad connection Sensor fault

4 Contact the professional who takes care of

maintenance of the appliance

PCU The return temperature sensor is on

an open circuit

Bad connection Sensor fault

4 Contact the professional who takes care of

maintenance of the appliance

PCU Return temperature too low Bad connection

Sensor fault

4 Contact the professional who takes care of

maintenance of the appliance

No water circulation

4 Vent the air in the heating system

4 Check the circulation (direction, pump,

valves)

4 Check the water pressure

31/08/2011 - 300024163-001-B

MCA 25/28 BIC 6. Troubleshooting

Code Faults Cause

of the fault

L09 STB BACK

L10 DEP-RET<MIN

L11 DEP-RET>MAX

PCU Return temperature too high Bad connection

PCU Difference between the flow and

Description Checking / solution

Sensor fault

4 Contact the professional who takes care of

maintenance of the appliance

No water circulation

4 Vent the air in the heating system

4 Check the circulation (direction, pump,

valves)

4 Check the water pressure

Bad connection

return temperatures insufficient

Sensor fault

4 Contact the professional who takes care of

maintenance of the appliance

No water circulation

4 Vent the air in the heating system

4 Check the circulation (direction, pump,

valves)

4 Check the water pressure

Bad connection

return temperatures too great

Sensor fault

L12 STB OPEN

L14 BURNER FAILURE

4 Contact the professional who takes care of

maintenance of the appliance

No water circulation

4 Vent the air in the heating system

4 Check the circulation (direction, pump,

valves)

4 Check the water pressure

PCU Maximum boiler temperature

exceeded (STB thermostat maximum)

Bad connection Sensor fault

4 Contact the professional who takes care of

maintenance of the appliance

No water circulation

4 Vent the air in the heating system

4 Check the circulation (direction, pump,

valves)

4 Check the water pressure

PCU 5 burner start-up failures No ignition

4 Contact the professional who takes care of

maintenance of the appliance

Presence of the ignition arc but no flame formation

4 Check that the gas valve is fully opened

4 Contact the professional who takes care of

maintenance of the appliance

Presence of the flame but insufficient ionization (<3 µA)

31/08/2011 - 300024163-001-B

4 Check that the gas valve is fully opened

4 Contact the professional who takes care of

maintenance of the appliance

6. Troubleshooting MCA 25/28 BIC

Code Faults Cause

of the fault

L16 PARASIT FLAME

L17 VALVE FAIL

L34 FAN FAILURE

L35 BACK>BOIL FAIL

PCU Detection of a parasite flame Ionization current present when there should not

PCU Problem on the gas valve Bad connection

PCU The fan is not running at the right

PCU Flow and return reversed Bad connection

Description Checking / solution

be a flame Ignition transformer defective Gas valve defective The burner remains very hot: CO2 too high

4 Contact the professional who takes care of

maintenance of the appliance

SU PCB faulty

4 Contact the professional who takes care of

maintenance of the appliance

Bad connection

speed

Fan defective

4 Contact the professional who takes care of

maintenance of the appliance

Sensor fault

4 Contact the professional who takes care of

maintenance of the appliance

Water circulation direction reversed

L36 I-CURRENT FAIL

L37

SU COM.FAIL

L38 PCU COM.FAIL

L39 BL OPEN FAIL

L40 TEST.HRU.FAIL

L250 DEF.WATER MIS.

4 Check the circulation (direction, pump,

valves)

PCU The flame went out more than 5

times in 24 hours while the burner was operating

No ionization current

4 Check that the gas valve is fully opened

4 Contact the professional who takes care of

maintenance of the appliance

PCU Communication failure with the SU

PCB

Bad connection

4 Contact the professional who takes care of

maintenance of the appliance

PCU Communication failure between the

PCU and SCU PCBs

Bad connection SCU PCB not connected or faulty

4 Contact the professional who takes care of

maintenance of the appliance

PCU The BL inlet opened for a short time Bad connection

External cause Parameter incorrectly set

4 Contact the professional who takes care of

maintenance of the appliance

PCU HRU/URC unit test error Bad connection

External cause Parameter incorrectly set

4 Contact the professional who takes care of

maintenance of the appliance

PCU The water pressure is too low Hydraulic circuit incorrectly vented

Water leak Measurement error

L251

MANOMETRE FAIL

4 Top up with more water if necessary

4 Reset the boiler

PCU Fault on the water pressure sensor Wiring problem

The manometer is defective Sensor pcb defective

4 Contact the professional who takes care of

maintenance of the appliance

31/08/2011 - 300024163-001-B

MCA 25/28 BIC 6. Troubleshooting

Code Faults Cause

of the fault

D03

OUTL S.B FAIL.

D04

OUTL S.C FAIL.

D05 OUTSI.S.FAIL.

D07 AUX.SENS.FAIL.

D09 DHW S.FAILURE

D11

ROOM S.A FAIL.

D12

ROOM S.B FAIL.

D13

ROOM S.C FAIL.

D14 MC COM.FAIL

SCU Circuit B flow sensor fault

SCU Outside temperature sensor fault

SCU Auxiliary sensor fault Bad connection

SCU Domestic hot water sensor fault

SCU A room temperature sensor fault

SCU Communication failure between the

Description Checking / solution

Bad connection

Circuit C flow sensor fault Remarks:

The circuit pump is running. The 3-way valve motor on the circuit

Sensor fault

4 Contact the professional who takes care of

maintenance of the appliance

is no longer powered and can be adjusted manually.

Bad connection

Remarks: The boiler operates on BOILER MAX temperature. The valve setting is no longer

Sensor fault

4 Contact the professional who takes care of

maintenance of the appliance

ensured but monitoring the maximum temperature of the circuit after the valve is ensured. Valves may be manually operated. Reheating the domestic hot water remains ensured.

Sensor fault

4 Contact the professional who takes care of

maintenance of the appliance

Bad connection

Remarks: Heating of domestic hot water is no longer ensured. The load pump operates.

Sensor fault

4 Contact the professional who takes care of

maintenance of the appliance

The load temperature of the dhw tank is the same as the boiler.

Bad connection B room temperature sensor fault C room temperature sensor fault

Note: The circuit concerned operates

Sensor fault

4 Contact the professional who takes care of

maintenance of the appliance

without any influence from the room sensor.

Bad connection SCU PCB and the boiler radio module

4 Check the link and the connectors

Boiler module failure

D15 ST.TANK S.FAIL

D16

SWIM.P.B. S.FAIL

D16

SWIM.P.C. S.FAIL

D17 DHW 2 S.FAIL

31/08/2011 - 300024163-001-B

4 Change the boiler module

SCU Storage tank sensor fault

Note: The hot water storage tank reheating operation is no longer assured.

SCU Swimming pool sensor fault circuit

B Swimming pool sensor fault circuit C

Note:

Bad connection

Sensor fault

4 Contact the professional who takes care of

maintenance of the appliance

Bad connection

Sensor fault

4 Contact the professional who takes care of

maintenance of the appliance

Swimming pool reheating is always done during the circuit's comfort period.

SCU Sensor fault tank 2 Bad connection

Sensor fault

4 Contact the professional who takes care of

maintenance of the appliance

6. Troubleshooting MCA 25/28 BIC

Code Faults Cause

of the fault

D27 PCU COM. FAIL

D29 IOBL.3WV B DEF

D30 IOBL.3WV C DEF

D31 COM.IOBL FAIL.

D32 5 RESET:ON/OFF

D37

TA-S SHORT-CIR

SCU Communication failure between the SCU and PCU PCBs

SCU Communication failure between the

SCU The IOBL function is no longer

SCU 5 resets done in less than an hour

SCU The Titan Active System® is short-circuited

Description Checking / solution

4 Contact the professional who takes care of maintenance of the appliance

The V3V module is switched off SCU PCB and the V3V module

The V3V module and the SCU PCB are not

connected to the same live terminal

The V3V module has been removed

4 Contact the professional who takes care of

maintenance of the appliance

The V3V module is switched off SCU PCB and the V3V module

The V3V module and the SCU PCB are not

connected to the same live terminal

The V3V module has been removed

4 Contact the professional who takes care of

maintenance of the appliance

Problem on the SCU PCB active

4 Contact the professional who takes care of

maintenance of the appliance

4 Switch the boiler off and switch back on

4 If the boiler does not start after several resets (5 attempts possible), contact your

heating engineer and inform him of the error message displayed

D38 TA-S DISCONNEC

4 Contact the professional who takes care of maintenance of the appliance

Remarks: Domestic hot water production has stopped but can nonetheless be restarted using key r. The tank is no longer protected. If a tank without Titan Active System® is connected to the boiler,check that the TAS simulation connector (delivered with package AD212) is fitted to the sensor card.

SCU The Titan Active System® is on an open circuit

4 Contact the professional who takes care of maintenance of the appliance

31/08/2011 - 300024163-001-B

MCA 25/28 BIC 7. Technical specifications

7 Technical specifications

7.1 Technical specifications

Boiler type

General

Flow rate setting Adjustable

Nominal output (Pn) Heating System (80/60 °C)

Nominal output (Pn) DHW System

Data on the gases and combustion gases

Gas consumption - Natural gas H (G20) minimum-maximum

Gas consumption - Propane G31 minimum-maximum

NOx-Emission per year (n =1)

Mass flue gas flow rate minimum-maximum kg/h 8,9 - 49,3

Flue gas temperature minimum-maximum °C 30 - 85

Maximum counter pressure

Characteristics of the heating circuit

Water content

Water operating pressure (PMS) maximum kPa (bar) 300 (3,0)

Water temperature maximum °C 110

Operating temperature maximum °C 90

Characteristics of the domestic hot water circuit

Specific hot water flow D (60 °C)

Specific hot water flow D (30 °C)

Water content

Operating pressure (Pmw) maximum kPa (bar) 800 (8,0)

Electrical characteristics

Power supply voltage

Power consumption - Full load

Electrical protection index

Other characteristics

Total weight (empty)

Acoustic level at 1 metre

minimum-maximum kW 5,0 - 24,1

Factory setting kW 19,4

minimum-maximum kW 5,0 - 29,9

Factory setting kW 29,9

m3/h

maximum W 162

Factory setting W 72

mg/kWh 38

Pa 130

l 1,8

l/min 7,5

l/min 20,0

l 40,5

VAC 230

kg 70

dB(A) 44

MCA 25/28 BIC

Modulating, Start/Stop, 0 - 10 V

0,55 - 3,10

0,21 - 1,20

IPX4D

31/08/2011 - 300024163-001-B

8. Energy savings

8 Energy savings

8.1 Energy-saving advice

MCA 25/28 BIC

4 Keep the room in which the boiler is installed well ventilated.

4 Do not block ventilation outlets.

4 Do not cover the radiators. Do not hang curtains in front of the

radiators.

4 Install reflective panels behind the radiators to prevent heat

losses.

4 Insulate the pipes in rooms that are not heated (cellars and lofts).

4 Close the radiators in rooms not in use.

4 Do not run hot (or cold) water pointlessly.

4 Install a water-saving shower head to save up to 40 % energy.

4 Take showers rather than baths. A bath consumes twice as much

water and energy.

8.2 Recommendations

The remote control is available in the following versions:

4 Wire

4 Radio

The setting of the control panel and/or of the remote control has a considerable influence on energy consumption.

A few tips:

4 In the room in which the room thermostat is installed, it's advised

not to use thermostatic valve radiators. If a thermostatic valve is used the valve must be fully opened.

4 Completely closing and opening thermostatic valve radiators

causes undesirable temperature fluctuations. Open and close thermostatic valves in small steps.

4 Lower the temperature to around 20°C. This reduces heating costs

and energy consumption.

4 Lower the temperature when you air the rooms.

4 When setting a time schedule , bear days when you are absent

and holidays in mind.

31/08/2011 - 300024163-001-B

MCA 25/28 BIC

9 Warranty

9.1 General

9.2 Warranty terms

9. Warranty

You have just purchased one of our appliances and we thank you for the trust you have placed in our products.

Please note that your appliance will provide good service for a longer period of time if it is regularly checked and maintained.

Your fitter and our customer support network are at your disposal at all times.

The following provisions are not exclusive of the buyer being able benefit from the legal provisions applicable regarding hidden defects in the buyer's country.

Starting from the purchase date shown on the original fitter's invoice, your appliance has a contractual guarantee against any manufacturing defect.

The length of the guarantee is mentioned in the price catalogue. The manufacturer is not liable for any improper use of the appliance or failure to maintain or install the unit correctly (the user shall take care to ensure that the system is installed by a qualified engineer).

In particular, the manufacturer shall not be held responsible for any damage, loss or injury caused by installations which do not comply with the following:

4 applicable local laws and regulations,

4 specific requirements relating to the installation, such as national

and/or local regulations,

4 the manufacturer's instructions, in particular those relating to the

regular maintenance of the unit,

4 the rules of the profession.

The warranty is limited to the exchange or repair of such parts as have been recognised to be faulty by our technical department and does not cover labour, travel and carriage costs.

The warranty shall not apply to the replacement or repair of parts damaged by normal wear and tear, negligence, repairs by unqualified parties, faulty or insufficient monitoring and maintenance, faulty power supply or the use of unsuitable fuel.

31/08/2011 - 300024163-001-B

Sub-assemblies such as motors, pumps, electric valves etc. are guaranteed only if they have never been dismantled.

The legislation laid down by european directive 99/44/EEC, transposed by legislative decree No. 24 of 2 February 2002 published in O.J. No. 57 of 8 March 2002, continues to apply.

DE DIETRICH THERMIQUE S.A.S.

www.dedietrich-thermique.fr

Direction des Ventes France

57, rue de la Gare

F- 67580 MERTZWILLER

+33 (0)3 88 80 27 00 +33 (0)3 88 80 27 99

DE DIETRICH REMEHA GmbH

www.dedietrich-remeha.de

VAN MARCKE

www.vanmarcke.be

WALTER MEIER (Klima Schweiz) AG

www.waltermeier.com

NEUBERG S.A.

www.dedietrich-heating.com

DE DIETRICH

Rheiner Strasse 151

D- 48282 EMSDETTEN

+49 (0)25 72 / 23-5

+49 (0)25 72 / 23-102

info@dedietrich.de

Weggevoerdenlaan 5

B- 8500 KORTRIJK

+32 (0)56/23 75 11

Bahnstrasse 24

CH-8603 SCHWERZENBACH

+41 (0) 44 806 44 24

+41 (0) 44 806 44 25

39 rue Jacques Stas

L- 2010 LUXEMBOURG

+352 (0)2 401 401

ch.klima@waltermeier.com

DE DIETRICH

www.dedietrich-heating.com

Room 512, Tower A, Kelun Building 12A Guanghua Rd, Chaoyang District

C-100020 BEIJING +86 (0)106.581.4017 +86 (0)106.581.4018 +86 (0)106.581.7056 +86 (0)106.581.4019

contactBJ@dedietrich.com.cn

Serviceline +41 (0)8 00 846 846

WALTER MEIER (Climat Suisse) SA

www.waltermeier.com

Z.I. de la Veyre B, St-Légier

CH-1800 VEVEY 1

+41 (0) 21 943 02 22

+41 (0) 21 943 02 33

ch.climat@waltermeier.com

Serviceline +41 (0)8 00 846 846

ÖAG AG

www.oeag.at

Schemmerlstrasse 66-70

A-1110 WIEN

+43 (0)50406 - 61624

+43 (0)50406 - 61569

dedietrich@oeag.at

AD001NU-AC

www.dedietrich-otoplenie.ru

ул. Гиляровского, д. 8

129090 г. Москва

+7 495 988-43-04 +7 495 988-43-04

dedietrich@nnt.ru

офис 52

DEDIETRICH THERMIQUE 57,ruedelaGareF-67580MERTZWILLER-BP 30

© Copyright All technical and technological information contained in these technical instructions, as well as any drawings and technical descriptions supplied, remain our property and shall not be multiplied without our prior consent in writing.

31/08/2011

DE DIETRICH MCA 25, MCA 28 BIC User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual