Accorroni MEC MIX C Datasheet

Brand: Accorroni

Model: MEC MIX C

Category: Space heaters

Type: Datasheet

This manual is also suitable for

MEC MIX F

Wall mounted air heaters

with premixed gas burner

MEC MIX C

condensation and modulation

MEC MIX F

xed power

TECHNICAL INFORMATION

Wall mounted air heaters with premixed gas burner

Range MEC MIX C condensation and modulation

Model 20/35 - 20/45 - 20/70 - 20/90

Range MEC MIX F xed power

Model 35 - 50 - 70 - 100

Technical Information

The present manual is divided in ve sections:

- SECTION A - GENERAL INFORMATION

It contains all details related to the description of the generators and their technical characteristics

- SECTION B - OPERATING AND MAINTENANCE

Section reserved to the user and contains all the information necessary for the proper operation and

periodic testing It collects all the indications and guidelines that must be observed for the installation

- SECTION C - HYDRO INSTALLATION

- SECTION D - ELECTRICAL INSTALLATION

- SECTION E - SERVICE AND MAINTENANCE

Important notes for consultation:

1 - To ensure a correct and safe use of the device, the planner, the installer, the user and the maintainer, for their

respective responsibilities, are required to strictly comply with the present manual.

This manual should be conserved for the eventual consultations and must

accompany the equipment throughout its lifetime, including the case of transfer to third parties.

2 - WARNING! Advises the reader that the next given information is extremely important and must be followed

exactly. Otherwise proper function of the unit and safety might be jeopardised. Paragraphs written in bold letters

contains important information, suggestion and advice that are strictly recommended.

3 - A2B Accorroni E.G. S.r.l. declines any responsibility for any damage caused by improper use of the

appliance,due to not applying the information given in this manual.

4 - Data, pictures and components may vary without notice. A2B Accorroni E.G. S.r.l. may carry out some

changesto the aim of product development and improving.

5 - Any reference to local laws, European directives and technical regulation reported in this manual are intended

as general information and valid on the date of print out. Any modication occurred after this date might not be

constitute reason for any obligation of A2BAccorroni E.G. S.r.l. against third parties.

6 - A2B Accorroni E.G. S.r.l. is responsible for product’s conformity to the laws, directives and technical regulation

in force on the date of commercialization. A2B Accorroni E.G. S.r.l. is not responsible for plant design, use and

maintenance’s compliance with laws and regulation in force.

sono ad esclusivo carico, per le rispettive competenze, del progettista, dell’installatore e dell’utente.

TABLE OF CONTENTS

1. GENERAL WARNINGS ............................................................................................................. 4

2 . SAFETY PRECAUTION ............................................................................................................. 4

2.1 Qualication of the installer ........................................................................................................ 4

2.2 Power supply .............................................................................................................................. 4

2.3 Gas fuel ...................................................................................................................................... 4

2.4 Gas leaks ................................................................................................................................... 4

2.5 Use ............................................................................................................................................. 4

2.6 Transport and handling .............................................................................................................. 4

3 . GENERAL FEATURES .............................................................................................................. 5

3.1 Description of operation ............................................................................................................ 5

3.2 Construction features ................................................................................................................. 5

3.3 Table of technical data MEC MIX C condensation axial ............................................................ 6

3.4 Table of technical data MEC MIX F axial .................................................................................. 6

3.5 Wiring diagram MEX MIX C condensation centrifuge ................................................................ 7

3.6 Table of technical data MEC MIX F centrifuge .......................................................................... 7

3.7 Dimensions MEX MIX C 20/35 - 20/45 centrifuge ..................................................................... 8

3.7 Dimensions MEX MIX F 35 -50 centrifuge ................................................................................. 8

3.8 Dimensions MEC MIX C 20/35 - 20/45 axial .............................................................................. 9

3.8 Dimensions MEC MIX F 35-50 axial .......................................................................................... 9

3.9 Dimensions MEC MIX C 20/70 - 20/90 centrifuge .................................................................... 10

3.9 Dimensions MEC MIX F 70-100 centrifuge................................................................................ 10

3.10 Dimensions MEC MIX C 20/70 - 20/90 axial ............................................................................. 11

3.10 Dimensions MEC MIX F 70-100 axial ....................................................................................... 11

3.11 Electrical wiring ......................................................................................................................... 12

4 . CONTROL AND SAFETY.......................................................................................................... 13

4.1 Description ................................................................................................................................ 13

4.2 General features ....................................................................................................................... 13

4.3 Technical data logical board ...................................................................................................... 13

4.4 Start-up inspection .................................................................................................................... 14

5 . CHRONOTHERMOSTAT GA1 .................................................................................................. 15

5.1 Application ................................................................................................................................. 15

5.2 Technical data ........................................................................................................................... 15

5.3 User guide ................................................................................................................................. 15

5.4 Description of error codes ......................................................................................................... 19

5.5 Instructions for installation ......................................................................................................... 19

5.6 Wiring diagram for equipment BRAHMA type TC340P ............................................................. 20

5.7 Wiring diagram for cascade connections of multiple devices via Open Therm ......................... 21

5.8 Type of connections .................................................................................................................. 22

6 . INSTALLATION ......................................................................................................................... 23

6.1 General rules for installation of the unit .................................................................................... 23

6.2 Installation Sequence ............................................................................................................... 23

6.3 Exhaust ue/combustion design ............................................................................................... 25

6.4 Example of calculation .............................................................................................................. 25

6.5 Condensate drainage ................................................................................................................ 31

7. INSTALLATION.......................................................................................................................... 32

7.1 Heater connection to the power supply ..................................................................................... 32

7.2 Installation of the chrome thermostat ........................................................................................ 32

8. SERVICE AND MAINTENANCE ............................................................................................... 33

8.1 First start ................................................................................................................................... 33

8.2 How to adjust the gas valve ...................................................................................................... 33

8.3 How to change GAS .................................................................................................................. 35

8.4 Maintenance ............................................................................................................................. 35

SECTION A - GENERAL INFORMATION

1. GENERAL WARNINGS

The present manual is integral part of the product.

It must be stored carefully for any future use or

reference.

Failure to comply with the instruction given by this

manual will void the warranty terms. In case of resell

or transfer of the unit to others assure this manual is

forwarded with it.

The appliance shall be used solely for the purpose to

which has been designed and manufactured.

Any use of the unit not listed hereafter will be considered

improper and therefore dangerous.

2. SAFETY PRECAUTIONS

2.1 QUALIFICATION OF THE INSTALLER

Installation of the unit shall be carried out by trained

and qualied operators.

2.2 POWER SUPPLY

The air heater MEC MIX COND shall be properly powered

and grounded following the local regulation.

The grounding system shall be properly designed to

guarantee an efcient grounding.

2.3 GAS FUEL

Before starting the unit assure the followings:

- gas supply parameters are compatible with th data

shown on the unit’s label

- the air intake grate is free from any obstacle

- the unit is supplied with proper fuel

- the plant shall be designed for the actual power

output, tted with proper safety and controldevices,

in compliance with the local regulation

- cleaning of the air supply ducts and gas piping has

been properly carried out

- the gas supply ow rate is adequate for the

unit’s requested ow rate

- the gas supply pressure is within the range shown

on the unit’s label

2.4 GAS LEAK

In case of smell of gas:

- do not operate mobile phone, switch or any device

that could cause sparking;

- immediately open windows and doors;

- all qualied operator for assistance

2.5 USE

Do not allow children nor not qualied operators

of running the unit.

Strictly respect the following advices:

- do not touch the unit if wet;

- do not insert anything through the fan’s grate;

- do not access the inside of the unit. Only qualied

operator is allowed;

- before any maintenance, including cleaning of the

cover, cut off the unit’s electric power ;

- do not touch the exhaust ue as well as any warm

part of the unit;

- do not wet the unit with any liquid;

- do not ground the unit by means of the gas pipe;

- do not install the unit outdoors;

- do not place anything on top of the unit;

- do not touch moving parts of the unit;

2.6 TRANSPORTATION AND HANDLING

The unit is delivered packaged on wooden pallet.

The handling of the unit requires proper equipment,

as forklift or trans pallets, adequate for the unit’s

weight.

Carefully handle the unit by means of the relative

supports.

WARNING! During transport and handling the unit

shall be kept vertical.

At receiving the goods, visually check for any damage to

the box or the unit either. In case of relevant damage,

immediately claim to the carrier company and do not

install the unit.

Do not dispose the package in the environment

and keep it out of reach of children.

The unit shall be stored in a dry place and protected

against weather.

Avoid long term storage.

3. GENERAL FEATURES

3.1 DESCRIPTION OF OPERATION

The MEC MIX COND is classied as individual gas-

red air heater equipped with hermetically sealed

combustion chamber and premix-burner.

The system is category II2H3P as per EN1020 and can

be supplied by natural gas (G20) and L.P.G. (G31).

It has been designed for indoor installation, directly

in the served room.

The combustion circuit is sealed from the room’s

air as prescribed by EN1020 and EN1196 for type

C: combustion air inlet and exhaust outlet ensure

the combustion air intake and the exhaust gas

expulsion.

The air heater is controlled by a micro processor

integrated in the programmable timer, which includes

the room temperature thermostat.

Upon the heating request, the control starts the premix

blower, which runs for 40 s and afterwards the burner

starts.

A ame sensor checks the burner properly started; if

any ame isn’t detected the unit will be blocked.

The exhaust gas ows throughout the inner side of

the exchanger, while the air ows over the exchanger

rising its temperature and thus warming the room.

The air ow direction can be adjusted by means of

aps mounted onto the air outlet grate.

The air blower runs only if the exchanger’s temperature

is higher than a xed limit (e. g. 40 °C), in order to avoid

of blowing cold air. In case of overheating of the heat

exchanger, likely due to a failure, a temperature sensor

detects the exchanger’s temperature and cut-off the

gas valve while the premix-blower and the air blower

run at maximum rpm. If the temperature keep rising,

the safety thermostat would cause the complete shut

off of the unit.

In this case the unit can be reset by the control

panel.

WARNING!

The unit reset after the safety Thermostat activation

shall be performed only by qualied operator, who

rst shall identify the mode and cause of failure.

The premix-blower is placed in front of the burner and

ensure the proper air-gas ratio at any condition.

If the air intake ductor the exhaust ue either is not clean

or any obstacle would hinder the air/exhaust ow, the

electronic control is able to adjust the premix-blower

rpm and therefore the power output.

An exhaust thermostat check the proper function within

certain limit; if the exhaust temperature exceeds the

limit, the unit would be stopped.

In winter mode the unit can run in automatic or Manual

mode either (see HEATING section).

In summer mode the unit can run the air blower either in

automatic or manual mode, in order to have a pleasant

air circulation inside the room.

3.2 CONSTRUCTION FEATURES

The air heater MEC MIX COND is delivered equipped

with the following:

- high head premix-blower, with rpm modulation

- combustion chamber, made of stainless steel

- heat exchanger, made of stainless steel, high

heat-exchanging performance

- covering panels made of epoxy coated steel

- axial and centrifugal air blowers running high

ow rate and at variable rpm Further equipments

on safety:

- control board with microprocessor and noise lter,

controls the burner starting, the safety devices,

the ame modulation, the air blower rpm, the

premix blower rpm and thus the heat exchanger

temperature by means of sensor

- power supply 230 V - 50 Hz

- safety time 5 s

- chamber evacuating time 40 s

- model BRAHMA TC3 40 with ignition

Transformer model BRAHMA AR1

- limit thermostat 90 °C, to protect the heat

exchanger against over heating

- exhaust thermostat, which activation will stop

the unit in case of obstruction to the air/gas or

exhaust ow; it would also activate in case of

obstruction of the internal condensate drain

- gas solenoid valve, is deactivated any time a

safety device activates and stops the gas ow

- power supply 230 V - 50 Hz

- operating temperature range 0 / 60 °C

- model SIT 848 SIGMA

3.3 TABLE OF TECHNICAL DATA MEC MIX C CONDENSATION AXIAL

3.4 TABLE OF TECHNICAL DATA MEC MIX F AXIAL

3.5 TABLE OF TECHNICAL DATA MEC MIX C CONDENSATION CENTRUFUGE

3.6 TABLE OF TECHNICAL DATA MEC MIX F CENTRUFUGE

* The condensate drain is present only in the Model MEC MIX C

747

120

3.7 DIMENSIONS

Serie MEC MIX C condensation model 20/35 - 20/45 centrifuge fans

Serie MEC MIX F model 35-50 centrifuge fans

Values in mm

gas

connection

air inlet exhaust

outlet

Condensate

Drain

TOP VIEW

3.8 Dimensions

Serie MEC MIX C condensation model 20/35 - 20/45 axial fans

Serie MEC MIX F model 35-50 axial fans

* The condensate drain is present only in the Model MEC MIX C

Values in mm

TOP VIEW

gas

connection

exhaust

outlet

air inlet Condensate

Drain

Dimensions

Serie MEC MIX C condensation model 20/70 – 20/90 centrifuge

Serie MEC MIX F model 70-100 centrifuge

Values in mm

gas

connection

gas

connection

air inlet air inlet

exhaust

outlet

exhaust

outlet

3.10 Dimensions

Serie MEC MIX C condensation model 20/70 – 20/90 axial

Serie MEC MIX F model 70-100 axial

Values in mm

gas

connection

gas

connection

air inlet air inlet

exhaust

outlet

exhaust

outlet

3.11 Electrical wiring - Range MEC MIX C/F

LEGEND

ACC1 Remote ignition transformer

C1 Capacitor 1 (5μF)

C2 Capacitor 2 (5μF)

EA Ignition electrode

EF Premix blower

EV1 First stage valve

EX Cascade unit connection

F1 Fuse 1 (6,3A)

F2 Fuse 2 (6,3A)

FAN1 Air motor fan 1

FAN2 Air motor fan 2

GA1 Chrono-thermostat

ION Detecting electrode

M1 Terminal 1

RESET Reset button

SA Room temperature sensor (optional)

SL LED lights

SR LIMIT/FAN sensor

STF Fire damper (optional

Fig. 2

SECTION B - OPERATING AND MAINTENANCE

4. CONTROL AND SAFETY

the MEC MIX COND are shown. The unit is operated

byBRAHMATC340 control board. The control panel

also includes the room temperature thermostat,

programmable timer and function/failure display.

Hereafter all instruction for proper use of the digital

control.

4.1 DESCRIPTION

This device has been design for function and safety

control of gas-red air heater with hermetically sealed

combustion chamber and running automatic start and

blower modulation.

4.2 GENERAL FEATURES

The major features of this device are the followings:

- compliance with EN298:2003-09 (European

standard for ame check automatic device for

gas burner)

- CE certicate in compliance with Directive GAS

90/396/EEC and following amendmen (Directive

93/68/EEC)

- air blower rpm driven by means of a phase-cut

driver

- burner’s motor driven by means of phase-cut

driver for fan-assisted burner type or PWM signal

for premix-burner equipped with brushless motor

- two independent safety contactdrivingthe EV1

main gas solenoid valve

- output for auxiliary ignition electronic transformer

control

- heat output modulation by means of PWM signal

(for premix burner)

- possibility of interfacing with chromo-thermostat

BRAHMA GA1 through Open Therm TM

communication protocol

- summer ventilation function (available only with

chrono-thermostatGA1)

- air delivery temperature and safety control by

means of a double NTC ST16 temperature probe

- air delivery temperature control by means of a

double NTC ST08 temperature probe

- possibility of connecting a safety thermostat

- arranged for NTC ST07 temperature probe

control used as room or outdoor temperature

sensor

- possibility of connecting are damper actuator

- possibility of connecting an analogue signal

controller 0-10 V (e.g. PLC)

- pcb on-board manual reset button

- operation and failures signalling by two colours led

- communication port RS-232 for set-up and

diagnostic

- integrated noise lter EMI

- two fuses, equipped with ejector, for power supply

line protection on both potentials

- pcb on-board connections for safety grounding

4.3 TECHNICAL DATA LOGICAL BOARD

Internal fuse: 6.3 A type delayed

for TC340P: 3.15 A type delayed

Esternal fuse (recommended): 6.3 A type rapide 1

for TC340P: 3.15 A type rapide 1

CE type certicate:

CE0051-PIN0051BU3887

Timing:

Pre-ignition purge ventilation (TP):0 60 s

Safety time (TS): 3 … 120 s

Response time for ignition failure: < 1 s

Post-shutdown ventilation

- premix blower EF (tPOST): 0 …1200 s

- warm air blower FAN (tFS): 2 0 … 1200 s

Warm air blower starting delay

FAN (tFA): 2 0 … 1200 s

Modulation delay (tRP1): 1 … 240 s

Lockout delay for extraneous ame

(opz. Knn): 0 … 60 s

Lockout delay for insufcient air ow

(opz. Qnn)3: 3 … 120 s

Pre-ignition time (opz. Jnn): 1 … 60 s

Cycle repeating attempts (opz. Ynn): 1… 10

components:

Interface OpenTherm™: 50 m Flame monitoring

Maximum cabling length for external:

Interfacce OpenTherm™: 50 m

Fig. 3

Connection of the probe double NTC

Brown

Black

Blue

Fig. 4

Measuring of the ame signal

Flame monitoring

The ame detecting device exploits the self rectifying

property of the ame. Note that, about safety, this

device is more sensitive to the ame during the purging

ventilation and the ignition steps (negative differential

switching).

Minimum ionizing current: 0.5 μA

System’s temperature probes

- Control probe (SR)

The control probe is used for heat-exchanger

temperature detection and thus for both fan control and

safety stop. It is a NTC double sensor type (standard

version) and BRAHMA ST16 sensor is required (see

picture 3).

- Room temperature probe (SA) - optional

The room temperature probe can be used in case the

remote control panel, equipped with room temperature

sensor, is placed in a separate room or the room

temperature shall be related to the outdoor one either.

See “FUNCTIONS” paragraph for more details.

To this purpose BRAHMA ST07 sensor is required for

room temperature detecting and BRAHMA SSE for

outdoor temperature.

Fire damper (STF) - optional By means of this contact

the status of the eventual re damper can be detected,

considering it normally closed. If the contact opens the

unit’s control interrupts the running cycle and keeps it

on stand-by. An alarm activates as well and it is shown

by lighting of the led.

Upon request, the response of the unit in case of

“contact open” may be changed.

4.4 START-UP INSPECTION

It is strictly recommended to perform the unit inspection

before the start-up and any time it occurs the unit hasn’t

been running for a long time or periodic check-up has

been carried out. Before starting the unit check the

followings:

- the combustion chamber is free from gas

- if ignition cycle is simulated without gas, check the

unit lockout occurs after the safety time

- if gas supply is interrupted while the unit is

running, check the solenoid valve cut-off happens

within 1 s. After restarting, the unit lockout shall

occur after a certain number of cycles (see set-up

parameter)

- operation timing and sequence shall correspond to

those declared for the type of control unit used

- the ame sensor signal shall be high enough

(Fig. 4)

- the ignition electrodes shall be properly xed to

have clearance equal to 2-4 mm

- the activation of safety devices shall cause the unit

lockout or the safety stop, in compliance

with the type of application.

5. CHRONO-THERMOSTAT GA1

5.1 APPLICATION

The digital chrono-thermostat GA1canbeweekly

Programmed for remote controlling the MEC MIX and

the room temperature, allowing 3 different temperature

levels and driving one or more heaters. It doesn’t

require power supply connection nor battery and it

can control 3 different heaters but they need to be

equipped with relative interfacing pcb, which shall be

specied in the order.

To the aim of a exible management of the facility

heating, this control panel allows of different

function modes: manual control; holidays; freezing

prevention.

The heater control is included in the chrono thermostat

as well, which manages the power output and the

automatic alarm resetting.

Here below a detailed description of the chrono

thermostat function and the user guide are

reported.

Picture 5 shows the look of this unit and picture 6

shows the display of the panel and picture 7 shows

the performances.

The use of serial interface is possible by adding

BRAHMA 810 unit and dedicated software.

Mirco amper measure

5.2 TECHNICAL DATA

Connection: not-polarized two wires type

Protection class: IP20

Weight: 110g

Display: LCD

Clock: quarz

Adjustingmode: modulating

Adjusting range: 1÷ 30 °C

Room Temperature display: 0 ÷ 35 °C

Temperature detecting time: every 60 s

Temperature detecting accuracy: 0.1 °C

Temperature setting accuracy: 0.5 °C

Temperature control accuracy: ±1°C

Memory term: 8 hours

Weekly programming on hourly basis with 3

temperature levels

Special function mode: automatic, manual,

holidays, freezing prevention

antigelo

5.3 USER GUIDE

Once reset the chrono-thermostat the time and date

on the display start lighting as reminder the operator

has to set them. Set-up is allowed in the following

modes: automatic, manual and freezing prevention.

Here below the setting procedure.

Push the [ ] button, the time is shown and the Day

starts lighting. By the encoder set the present day.

Then press [OK] to conrm and pass to hour setting,

otherwise press [ ] to return to the main menu. Repeat

the same to set hour and minute and conrm [OK].

In case of any action is taken within 10 s, the display

will show the main menu.

Mode “automatic”

The unit run the programme. The graphic, time

and temperature are lighted on the display while

automatically running the program, related to the day

of the week lighted on the left side of the display.

Mode “freezing prevention”

Three temperature levels can be set: [T2]highest, [T1]

medium and [T0] lowest.

The lowest Temperature can be used as “freezing

prevention” control. Push the [T2] button for highest

temperature setting by means of the encoder. Press

either [OK] or [T2] again to conrm. The same procedure

for setting [T1]. Note that anyway T2 shall be higher

than T1, Which shall be higher thanT0; otherwise a

“beep” sound advises that the value is not allowed.

However each temperature shall be within 1- 30 °C.

Push the [ ] button for [T0] setting, select the value by

means of the encoder, and press [ ] again to conrm

and return to the main menu.

Note: if press [OK] after selecting the T0 value the

“freezing prevention” mode would be activated.

On the display only the [ ] symbol and T0 temperature

will appear; the T0value can be changed by means

of the encoder.

Press [AUTO] button to exit the freezing prevention

mode and activate the weekly program.

Modo “manuale”

Press the [MANUAL] button to deactivate the weekly

program mode and manually select the desired room

temperature.

Press [OK] to conrm and run the manual mode.

Otherwise press [AUTO] to return back to the weekly

program mode.

In manual mode, the set temperature can be changed

at any time by means of the encoder.

On the display the graphic will not appear and the

[] symbol will light on.

Press the [AUTO]button to exit the manual mode and

return back to the weekly program mode.

Mode “holidays”

Press the [ ] button to set the desired room

temperature to be kept while the room isn’t used for

days.

Once selected the temperature press [OK] to conrm

and the number of days (shut down term) will be

requested: maximum 99 days.

Press [OK] to conrm.

The number of left days decrease everyday at midnight.

Once the holiday term expires, the control automatically

passes to the weekly program mode. In holidays mode

is possible to change the desired temperature by

means of the encoder and then press [OK] to conrm.

In order to change the holiday term, repeat the above

procedure. To exit the holidays mode press [AUTO] or

set thenumber of days = 0.

Fig. 5

Chrono thermostat GA1

Weekly programme

Press the [PROG] button to start the weekly

programming. By the encoder, select the day of the

week and press [OK] to enter the setting.

Select the time for starting by means of the encoder,

press [OK] to conrm and then select the temperature

level desired from this time; press [OK] to conrm and

then select the time extension for this temperature

and press [OK] to conrm. Repeat for setting other

temperature levels and time. It is possible to return

back without leaving the programming mode and

keeping the already set parameters.

Then press [PROG] to return to the selection of the

day of the week. By holding pressed the [OK] button

the lighted day programme will be copied to the next

day of the week.

Press [AUTO] to leave the programming mode

or hold pressed the [PROG] button.

Fig.6

DESCRIPTION DISPLAY

Indication of the day

1= Monday........7= Sunday Indicators multi function: time, temperature, error codes

Anomaly

Manual Flame and Block Anti frost

Communication

Graphic daily programming

Status of the generator

OFF- Summer/winter

Holidays

display liquid

crystals

Selector

functions

chrono/boiler

Button

ON-OFF

Anti frost

Button

maintenance

Button not used Button comfort

Button comfort

Encoder

Reset of memory

RESET

Programming

Fig.7

ILLUSTRATION OF THE COMMANDS

Standard communication

The communication icon is steadily lighted on if

communication with the heater is running properly.

Normally the requested heat output is displayed as

% of the nominal output.

Where applicable the number of heaters connected is

displayed on the top right.

Operation selection : Off - Summer - Winter

Press the [ ] button to select the operation mode

to be run: OFF ( ), SUMMER ( ) or WINTER ( ).

WINTER activates the heating.

Run and the output is modulated upon the outdoor and

room temperature (i.e. heating request from the chrono-

thermostat; the outdoor temperature is compared to

a set-point value).

SUMMER activates only the air blower for ventilation.

It can be activated manually or

automatically by program; T2 automatic; T0 and T1

in any other mode of operation and deactivating the

ventilation.

The manually activation - by pushing the bottom on

the chrono thermostat.

In the rst case press the [FAN] button to run the air

blower and press it again to stop it.

Press [OFF] to put the heater on stand-by, from any

function mode.

Outdoor temperature

Press long the [ ] button to enter the outdoor

temperature setting menu.

If one of the appliances switched to Encrono GA1 has

an outdoor temperature probe (congured to translate

information via Open Therm) it is possible to visualize

the value closed to indicator “tou”.

By which the set point “Tset” can be loaded and the

outdoor temperature displayed.

The Tset value is used to calculate the heat output

request and shall be within the range -99 / 100 °C.

Heater lockout and remote reset

In case of heater (or more than one) failure, which

causes the unit lockout, different signals might be

displayed based on the type of protocol/ application

used:

1. two digits number that identies the faulty unit

(n. 01 … n.02, ….etc), in case of heaters cascade

installation 2. “E00” error code, which identies the

mode of failure

3. “Err” in case the mode of failure is not available

(generic error) Table xx shows the list of failure modes

and codes.

Note that E05 is the sole failure independent from the

number of units connected, as it refers to the room

temperature sensor that is xed inside the control panel

indipendente of the display shown on the left side of

the screen, on the right you will see a funter three-digit

error code, preceded by the letter F, communicated

directly from the card remote and displayed without

any processing by the programmable thermostat.

Press [RESET] button to reset the alarm.

However some alarms cannot be reset by the control

panel; in this case E11 will be displayed for 10 s. For

some alarm the reset button is deactivated and a

“beep” sound advises that reset by the control panel

is not allowed.

Fig.8

DIMENSIONS mm

5.5 INSTRUCTIONS FOR INSTALLATION

The position of the control panel shall be selected based

on a proper location of the room sensor, embedded

in the panel; however at 1.5 m from the oor and far

from any heat/cold source (different heaters, windows,

etc). The control panel can be xed to the wall hanging

by provided slots or recessed in the wall by means of

proper box. The wall surface shall be at to avoid the

panel box deformation once xed and the consequent

difculty in coupling the cover.

After the box is xed, remove the cable terminal From

the slot and do the cables connection; then put the

terminal back into the slot.

The communication protocol allows of 50 m maximum

cable length and Ohm resistance of each cable shall

not exceed 5 Ohm.

In case of proximity to strong electromagnetic eld, it

is recommended to use shielded cable.

Fig. 10

CONNECTION OF THE PULL OUT

TERMINAL BOX

Terminal box

housing

Front panel

back

PCB

Connection

cables

Pull-out terminal screw

terminal box

FRONT PANEL ASSEMBLY

Front

Basic

Fig.9

5.4 DESCRIPTION OF ERROR CODES

Fig. 11

DIAGRAM STANDARD CYCLE

Power level

requested from

OpenTherm

(or calculated)

Exhaust

fumes (EF)

Modulator

Treated air fan

(FAN)

100%

MAX speed

MIN speed

MAX current

MIN current

TP-TS current

TP -TS speed

Starter / s

First level valve (EV1)

Second level valve (EV2)

5.6 WIRING DIAGRAM FOR EQUIPMENT BRAHMA TYPE TC340P

Fig.12

LEGEND

GA1 Chrono thermostat ENCRONO type GA1

EF Fan motor of the burner

FAN Fan motor of treated air

ACC1 Auxiliary ignition transformer

EV1 First stage valve

SR Temperature control sensor

STF Fire damper

SA Room temperature sensor (optional)

SL Led lights

RESET

EX Cascade connection

ION Flame sensor

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Accorroni MEC MIX C Datasheet

Brand: Accorroni

Model: MEC MIX C

Category: Space heaters

Type: Datasheet

This manual is also suitable for

MEC MIX F

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Accorroni MEC MIX C Datasheet

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Accorroni MEC MIX C Datasheet

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