Accorroni MEC MIX F Technical information

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Accorroni MEC MIX F Technical information | Manualzz

Wall mounted air heaters with premixed gas burner

MEC MIX C condensation and modulation

MEC MIX F fixed power

1

2

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 fixed power

Model 35 - 50 - 70 - 100

Technical Information

The present manual is divided in five 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 modification 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.

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TABLE OF CONTENTS

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

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

2.1 Qualification 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 flue/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

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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 qualified 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 efficient 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, fitted 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 flow rate is adequate for the unit’s requested flow 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 qualified operator for assistance

2.5 USE

Do not allow children nor not qualified 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 qualified operator is allowed;

- before any maintenance, including cleaning of the cover, cut off the unit’s electric power ;

- do not touch the exhaust flue 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.

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3. GENERAL FEATURES

3.1 DESCRIPTION OF OPERATION

The MEC MIX COND is classified as individual gasfired 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 flame sensor checks the burner properly started; if any flame isn’t detected the unit will be blocked.

The exhaust gas flows throughout the inner side of the exchanger, while the air flows over the exchanger rising its temperature and thus warming the room.

The air flow direction can be adjusted by means of flaps mounted onto the air outlet grate.

The air blower runs only if the exchanger’s temperature is higher than a fixed 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 qualified operator, who first 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 flue either is not clean or any obstacle would hinder the air/exhaust flow, 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).

6

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

flow rate and at variable rpm Further equipments

on safety:

- control board with microprocessor and noise filter,

controls the burner starting, the safety devices,

the flame 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 flow; 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 flow

- 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

7

3.5 TABLE OF TECHNICAL DATA MEC MIX C CONDENSATION CENTRUFUGE

3.6 TABLE OF TECHNICAL DATA MEC MIX F CENTRUFUGE

8

3.7 DIMENSIONS

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

Serie MEC MIX F model 35-50 centrifuge fans gas connection air inlet

120 exhaust outlet

Condensate

Drain

Values in mm

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

9

747

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 gas connection air inlet exhaust outlet

Condensate

Drain

TOP VIEW

Values in mm

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

10

Dimensions

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

Serie MEC MIX F model 70-100 centrifuge gas connection air inlet exhaust outlet

Values in mm

11 gas connection air inlet exhaust outlet

3.10 Dimensions

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

Serie MEC MIX F model 70-100 axial gas connection air inlet exhaust outlet

Values in mm

12 gas connection air inlet exhaust outlet

3.11 Electrical wiring - Range MEC MIX C/F

LEGEND

ACC1 Remote ignition transformer

C1

C2

EA

EF

EX

Capacitor 1 (5μF)

Capacitor 2 (5μF)

Ignition electrode

Premix blower

EV1 First stage valve

F1

F2

Cascade unit connection

Fuse 1 (6,3A)

Fuse 2 (6,3A)

FAN1 Air motor fan 1

13

FAN2 Air motor fan 2

GA1 Chrono-thermostat

ION Detecting electrode

M1 Terminal 1

RESET Reset button

SA

SL

Room temperature sensor (optional)

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-fired 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 flame check automatic device for

gas burner)

- CE certificate 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

14

control used as room or outdoor temperature

sensor

- possibility of connecting afire 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 filter 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 certificate:

CE0051-PIN0051BU3887

Timing:

Pre-ignition purge ventilation (TP):0

Safety time (TS):

Response time for ignition failure:

Post-shutdown ventilation

- premix blower EF (tPOST):

- warm air blower FAN (tFS):

Warm air blower starting delay

FAN (tFA):

Modulation delay (tRP1):

Lockout delay for extraneous flame

(opz. Knn):

Lockout delay for insufficient air flow

(opz. Qnn)3:

Pre-ignition time (opz. Jnn):

Cycle repeating attempts (opz. Ynn):

2

2

60 s

3 … 120 s

< 1 s

0 …1200 s

0 … 1200 s

0 … 1200 s

1 … 240 s

0 … 60 s

3 … 120 s

1 … 60 s

1… 10 components:

Interface OpenTherm™: 50 m Flame monitoring

Maximum cabling length for external:

.

Interfacce OpenTherm™: 50 m

Flame monitoring

The flame detecting device exploits the self rectifying property of the flame. Note that, about safety, this device is more sensitive to the flame during the purging ventilation and the ignition steps (negative differential switching).

Minimum ionizing current:

System’s temperature probes

- Control probe (SR)

0.5 μA

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 fire 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 flame sensor signal shall be high enough

(Fig. 4)

- the ignition electrodes shall be properly fixed to

have clearance equal to 2-4 mm

15

- 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 specified in the order.

To the aim of a flexible 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.

Connection of the probe double NTC

Brown

Black

Blue

Measuring of the flame signal

Mirco amper measure

Fig. 3

Fig. 4

5.2 TECHNICAL DATA

Connection: not-polarized two wires type

Protection class: IP20

Weight:

Display:

Clock:

Adjustingmode:

Adjusting range:

Room Temperature display:

Temperature detecting time:

Temperature detecting accuracy:

Temperature setting accuracy:

Temperature control accuracy:

Memory term: 8 hours

Chrono thermostat GA1 modulating

Weekly programming on hourly basis with 3 temperature levels

Special function mode: automatic, manual, holidays, freezing prevention antigelo

110g

LCD

quarz

1÷ 30 °C

0 ÷ 35 °C every 60 s

0.1 °C

0.5 °C

±1°C

Fig. 5

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 confirm and pass to hour setting, otherwise press [ ] to return to the main menu. Repeat the same to set hour and minute and confirm [ OK].

In case of any action is taken within 10 s, the display will show the main menu.

16

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 confirm. 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 confirm 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 confirm 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 confirm and the number of days (shut down term) will be requested: maximum 99 days.

Press [OK] to confirm.

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 confirm.

In order to change the holiday term, repeat the above procedure. To exit the holidays mode press [AUTO] or set thenumber of days = 0.

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 confirm and then select the temperature level desired from this time; press [OK] to confirm and then select the time extension for this temperature and press [OK] to confirm. Repeat for setting other temperature levels and time. It is possible to return back without leaving the programming mode and

Indication of the day

1= Monday........7= Sunday 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.

DESCRIPTION DISPLAY

Indicators multi function: time, temperature, error codes

Anomaly

Communication

Graphic daily programming

Status of the generator

OFF- Summer/winter

Holidays Anti frost Manual Flame and Block

Fig.6

ILLUSTRATION OF THE COMMANDS display liquid crystals

Button comfort

Encoder

Selector functions chrono/boiler

Button

ON-OFF

Anti frost

Button maintenance

Button not used

Reset of memory

RESET

Programming

Button comfort

Fig.7

17

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 chronothermostat; 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 first 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 (configured 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 identifies the faulty unit

(n. 01 … n.02, ….etc), in case of heaters cascade installation 2. “E00” error code, which identifies 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 fixed 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.

DIMENSIONS mm

Fig.8

18

5.4 DESCRIPTION OF ERROR CODES

FRONT PANEL ASSEMBLY

Front

CONNECTION OF THE PULL OUT

Terminal box housing

TERMINAL BOX

Pull-out terminal screw terminal box

Front panel back

PCB

DIAGRAM STANDARD CYCLE

Power level requested from

OpenTherm

(or calculated)

Exhaust fumes (EF)

Starter / s

First level valve (EV1)

Second level valve (EV2)

Modulator

Treated air fan

(FAN)

Connection cables

Fig. 10

Basic

Fig.9

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 floor and far from any heat/cold source (different heaters, windows, etc). The control panel can be fixed to the wall hanging by provided slots or recessed in the wall by means of proper box. The wall surface shall be flat to avoid the panel box deformation once fixed and the consequent difficulty in coupling the cover.

After the box is fixed, 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 field, it is recommended to use shielded cable.

100%

0%

MAX speed

TP -TS speed

MIN speed

MAX current

TP-TS current

MIN current

MAX speed

MIN speed

Fig. 11

19

5.6 WIRING DIAGRAM FOR EQUIPMENT BRAHMA TYPE TC340P

LEGEND

GA1 Chrono thermostat ENCRONO type GA1

EF

FAN

Fan motor of the burner

Fan motor of treated air

ACC1 Auxiliary ignition transformer

EV1 First stage valve

SR Temperature control sensor

20

STF

SA

SL

RESET

EX

ION

Fire damper

Room temperature sensor (optional)

Led lights

Cascade connection

Flame sensor

Fig.12

5.7 WIRING DIAGRAM FOR CASCADES CONNECTIONS OF MULTIPLE

DEVICES VIA OPEN THERM

NOTE

1. The cascade connection is possible with a chrono thermostat too. This configuration is not used in the versions TC340P1

21

Fig.13

5.8 TYPE OF CONNECTIONS

The following table shows the required connections

Ref

J1

J2

ACC2

J3

J4

J5

J6

J7-J8 (note 1) First stage valve EV1 and second stage valve EV2

J9

J10

J11

J12

J13

J14

J19

Description

Flame detector’s grounding

Detecting electrode Faston female 4,8 mm

Ignition electrode

Safety grounding )

Ground

Power supply

Power supply for blower FAN,

Blower EF, auxiliary transformer and modulation input/output

Type of connection

Faston female 6,3 mm

Faston fermale 4,8 mm

Faston female 2,8 mm

Faston female 6,3 mm (7 poles

2 poles screw terminal for Ø 2,5 mm! wires

2 poles screw terminal for Ø 2,5 mm! wires

9 poles connector type MOLEX® 3001

(terminals type MOLEX® 2478)

Modulator power supply (MOD) Connector

Room temperature (SR) and air temperature (SA) probes

Air pressure gage (APS) or PWM signals low-voltage

OpenTherm® communication connector and

Fire damper

RS-232 port for connection to the diagnostic software

Remote status and reset led connection

Pressure sensor

NOTE: J7 and J8 are connected in parallel configuration. It may useful for twin solenoids gas valve.

NOTE:

J7 and J8 are connected in parallel configuration.

It may useful for twin solenoids gas valve.

4 poles type MOLEX® 3001

(terminals type MOLEX® 2478)

2 poles type LUMBERG® 3114

(terminals type LUMBERG® 3111 01 L)

9 poles connector type LUMBERG® 3114

(terminals type LUMBERG® 3111 01 L)

7 poles connectors type LUMBERG® 3114

(terminals type LUMBERG® 3111 01 L)

6 poles screw terminals for Ø 2,5 mm! wire

4 poles connector LUMBERG® 3517 04 K

5 poles LUMBERG® 3517 05 K

3 poles LUMBERG® 3114

(terminals LUMBERG® 3111 01 L)

22

SECTION C - HYDRO INSTALLATION

6. INSTALLATION

This chapter refers to the MEC MIX F and MEC MIX C

Hydro Installation work and outlines the procedure and warnings about all the operation to be carried out.

6.1 THIS CHAPTER REFERS TO THE MEC MIX F

AND MEC MIX C

The installation works shall be carried out by qualified operator, as required and defined by the local regulation.

Fail the installation may cause damage and injuries to people, animals and the facility and the unit manufacturer cannot be considered guilty nor responsible in this case.

Refer to local regulation about:

- fire prevention

- design, construction and maintenance of the

heating plant

- energy saving construction and plant directive

2002/91/CE

- safety of gas-burner heating system installation

- safety of electric plant for gas-burner heating

system

The heater unit installation shall be done in compliance with the following guidelines:

- the rear of the unit shall be placed at least 33 cm

from the wall to ensure enough air flow rate.

Beside clearance is shown in picture 15 as well

- the minimum clearance from the bottom of the unit

shall be 50 cm to allow maintenance operations

- the unit shall be installed at 2.5-3.5 m from the

floor for best performances (Fig. 15 A/B). At lower

height the air flow may annoy people standing in

the room. At higher height the unit would mainly

suck the air from the ceiling and it wouldn’t

warm the air people can feel, thus causing

discomfort condition. To the aim of maximizing the

heater’s efficiency and comfort, the following rules

are recommended:

- avoid the air stream affects directly the people

- consider eventual obstacle to the air stream

(column, shelves, walls, etc)

- in case of large area treated and more than one

Heater are installed, preferably install the units

alternatively on opposite walls and displaced, not

in front of each other (see picture 16)

- preferably place the heater next or above/ below

the door and windows, in order to stop the

convective cool air forming near the window and

the cold air entering the room through the door

while open. Do not install the MEC MIX COND in

humid environment, like in greenhouse, because

they aren’t protected against high humidity

6.2 INSTALLATION SEQUENCE

The gas piping, the electric power supply cabling and the exhaust flue shall be in compliance with the plant design, following the local regulation.

1. Visually check the good’s package isn’t Damaged

before open it. In case, immediately claim to the

carrier company. A2B Accorroni E.G. ensures the

goods are delivered in good condition.

2. Fix the unit’s holder following the instruction given

in the manual

3. Use the screws and bracket delivered with the

unit

4. Ensure the gas supply meets the requirement in

terms of gas pressure

Natural gas

Check out if the pressure of the power supply is

20mbar (204 mm H2O) (tolerance between 17 mbar and 25 mbar).

L.P.G. (mix from Propane and Butane)

It is necessary to install a pressure reducer close to the liquid gas tank 1,5 bar and another reducer on the second sector from 1,5 bar to 37mbar (tolerance 20 mbar - 45 mbar).

5. Ensure all required pressure regulator and valves (including gate valve) are installed.

6.3 EXHAUST FLUE/COMBUSTION DESIGN

The MEC MIX is certified to be installed in the following configurations:

- type C13: splitted or coaxial combustion air duct

and exhaust flue throughout the wall. The heating

system is fully hermetic versus the heate room

(Fig. 18 splitted, Fig. 19) or coaxial (Fig. 20)

- type B23: the combustion air is taken from the

heated room whilst the exhausts are ejecte

outdoor by means of either horizontal or vertical

flue. The heating system isn’t fully hermetic

versus the heated room (Fig. 23 and 24) or roof

installation with vertical pipe (Fig. 25 and 26).

- type C53: splitted combustion air duct and

exhaust flue but oriented far from each other.

For example the air intake through out the wall

and the exhaust flue throughout the roof. The

heating system is fully hermetic versus the

heated room (Fig. 21 and 22).

- type C33: splitted or coaxial combustion air

duct and exhaust flue through out the roof. The

heating system is fully hermetic versus the

heated room (Fig. 27).

23

DISTANCES MEC MIX C AXIAL

A A

A min 200 cm

B min 250 cm

max. 350 cm

C min 40 cm

D min 50 cm

E min 33 cm

C

E

D

B

OBJECT

Fig.15 A

DISTANCES MEC MIX C CENTRIFUGE

A

B

A

24

A min 200 cm

B min 250 cm

max. 350 cm

C min 40 cm

D min 50 cm

E min 33 cm

C

E

D

OBJECT

Fig.15 B

EXEAMPLE OF POSITION

- type C63: this type of layout allow of using

exhaust flue and air duct with elbows and

couplings not delivered by the manufacturer.

However any item used shall be certified for

this use. Any diameter equal or larger than 60 mm

are allowed. It is important to refer to the used

items’ manufacturer for technical data, which shall

meet the requirements for this application. In any

case certified products shall be used, according to

the local regulation for this application (Tab. 12).

Tabs. 12, 13 show the acceptable pressure drop and the one that occurs with the delivered ducts.

These tabs can be used as reference for air duct and exhaust flue design.

The following tabs show the maximum ducts length acceptable; be advised that bends or any other accessory fixed to the duct causes an extra pressure drop.

According to the European rule UNI EN 1443 the used material should be type class W1.

In case of horizontal exhaust flue the following recommendation shall be applied:

- exhaust flue shorter than 1 m, the duct shall be

sloping 2-3 cm to make the condensate flow back

into the heater

- exhaust flue longer than 1.5 m, the condensate

25

Fig.16

forming along the flue shall be collected and drained by proper system, based on the local regulation.

As described in Tab. 13 for each special piece the length is different (curve 45° is equal at 0,9 m).

EXAMPLE EXHAUST DOWNLOAD FUMES

Fig. 17

Table 12

EXHAUST/AIR DUCTS DESIGN PARAMETERS

Mod.

Exhaust temperature°C Exhaust mass flow rate kg/h

CO

2

fumes %

Methane LPG

35

45

82

96

52

67

9,4-9,6 10,7

Table 13

DESIGN PARAMETERS USING A2B ACCORRONI's DUCTS Ø 60 / Ø 80

Corresponding Lenght Ø60

Mod.

elbow 15° u.m.

35-45 m

0,5

6.4 EXEMPLE OF CALCULATION

First linea sector = 7m

Elbow 90°

Linea sector

Elbow 45°

= 0,9 m.

= 3 m.

= 0,5 m.

Linea sector

Elbow 45°

Linea sector

Total meter

= 2 m.

= 0,5 m.

= 2 m.

= 15,9 m. elbow 45° m

0,9 elbow 87° m

1,1

Coaxial adapter m

3,2

The maximal length of the piping model 35, type C13, is 20m..

If the total length exceeds 20 m the way should be modified or using the pipes of bigger diameter, 80 mm, which can reach 40 m of length.

The total pipe charge’s loss will exceed the loss of maximal allowed charge (219Pa > 200Pa), in this case the installation is not permitted.

This installation will be correct if:

- reduce the length of the piping air/fumes;

- increase the piping diameter, Ø 80 mm.

INSTALLATION TYPE C13 - SPLITTED DUCTS Ø 60

MAXIMUM LENGHT ALLOWED (m)

Mod.

AIR DUCT EXHAUST FLUE

35 18 18

45 18 18

WARNING! the above mentioned length shall be considered for straight duct. Otherwise the pressure drop shall be calculated.

26

Fig. 18

INSTALLATION TYPE C13 - SPLITTED DUCTS Ø 80

MAXIMUM LENGHT ALLOWED (m)

Mod.

AIR DUCT EXHAUST FLUE

35 34 34

45 34 34

WARNING! the above mentioned length shall be considered for straight duct. Otherwise the pressure drop shall be calculated.

INSTALLATION TYPE C13 - WALL CROSS COAXIAL DUCT Ø 60 - 100

MAXIMUM LENGHT ALLOWED (m)

Mod.

35

45

COAXIAL DUCT

8

8

WARNING! the above mentioned length shall be considered for straight duct. Otherwise the pressure drop shall be calculated.

INSTALLATION TYPE C53 - SPLITTED DUCTS Ø 60

MAXIMUM LENGHT ALLOWED (m)

Mod.

AIR DUCT EXHAUST FLUE

35 34 34

45 34 34

WARNING! the above mentioned length shall be considered for straight duct. Otherwise the pressure drop shall be calculated.

27

Fig. 19

Fig. 20

Fig. 21

INSTALLATION TYPE C53 - SPLITTED DUCTS Ø 80

MAXIMUM LENGHT ALLOWED (m)

Mod.

AIR DUCT EXHAUST FLUE

35

45

34

34

34

34

WARNING! the above mentioned length shall be considered for straight duct. Otherwise the pressure drop shall be calculated.

INSTALLATION TYPE B23 - DUCTS Ø 60

MAXIMUM LENGHT ALLOWED (m)

Mod.

35

45

EXHAUST FLUE

24

24

WARNING! the above mentioned length shall be considered for straight duct. Otherwise the pressure drop shall be calculated.

INSTALLATION TYPE B23 - DUCTS Ø 80

MAXIMUM LENGHT ALLOWED (m)

Mod.

35

45

EXHAUST FLUE

34

34

WARNING! the above mentioned length shall be considered for straight duct. Otherwise the pressure drop shall be calculated.

28

Fig. 22

Fig. 23

Fig. 24

INSTALLATION TYPE B23 - ONLY EXHAUST FLUE Ø 80 ROOF INSTALLATION

MAXIMUM LENGHT ALLOWED (m)

Mod.

35

45

EXHAUST FLUE

34

34

WARNING! the above mentioned length shall be considered for straight duct. Otherwise the pressure drop shall be calculated.

INSTALLATION TYPE B23 - ONLY EXHAUST FLUE Ø 60 ROOF INSTALLATION

MAXIMUM LENGHT ALLOWED (m)

Mod.

35

45

EXHAUST FLUE

24

24

WARNING! the above mentioned length shall be considered for straight duct. Otherwise the pressure drop shall be calculated.

INSTALLATION TYPE C33 - ROOF CROSS COAXIAL DUCT Ø 60/100

MAXIMUM LENGHT ALLOWED (m)

Mod.

35

45

COAXIAL DUCT

24

24

WARNING! the above mentioned length shall be considered for straight duct. Otherwise the pressure drop shall be calculated.

29

Fig. 25

Fig. 26

Fig. 27

6.5 CONDENSATE DRAINAGE

The MEC MIX is equipped with a condensate drain, which a proper pipe shall be connected to.

The condensate drain is placed at the bottom of the unit and the provided kit (including a siphon) shall be connected to it, see picture 28 for details. Ensure the drain pipe is not bent and the condensate can flow properly by gravity, picture 29. The discharge of the condensate shall be done in compliance with the local regulation.

CONDENSATE DRAIN POSITION

The pipe used shall be suitable for connection to the heater, considering that heat, chemicals and vibration can stress the pipe. Avoid the use of copper or iron (if not stainless steel) which may rust or deteriorate due to the aggressive acid contained in the condensate.

Ensure the condensate drain pipe is not protected against freezing.

Note: the siphon connected to the condensate drain shall be filled with water before the start-up of the heater.

This to avoid the exhaust may come out through the condensate drainage piping.

Fig. 28

CONDENSATE DRAIN SIPHON DETAILS

Connection condensate drainage piping

30

Fig. 29

SECTION D - ELECTRICAL INSTALLATION

7. INSTALLATION

This section refers to the electric connection required for the MEC MIX.

7.1 HEATER CONNECTION TO THE POWER

SUPPLY

The electric connection shall be carried out by qualified operator as per local regulation.

First ensure the power supply is cut-off.

1. Check the proper power supply: 230V/1Ph/50 Hz.

2. Follow the electric diagram delivered togetherwith

the unit; cable H05VVF 3x1,5 mm 2 shall be

used, with max outer diameter equal to 8.4 mm.

3. Leave the ground cable longer than the live and

neutral, to ensure it will ground the unit even in

case of accidentally pulling the power cable.

The efficiency of the grounding cabling is very

important and shall be in compliance with the

local regulation. Any way never use the gas

supply piping for grounding the unit.

4. The unit shall be connected to the power supply

line by means of a 2-poles circuit breaker with

minimum 3mm clearance between contacts.

Both live and neutral lines shall be interrupted

when shutting down the circuit breaker. Cables

used for control panel connection to the unit shall

be protected against electromagnetic interference

by using shielded cables or fixing the control

cables far from power cables.

7.2 INSTALLATION OF THE CRONO

THERMOSTAT

- The electric connection shall be carried out by

qualified operator as per local regulation.

The chrono-thermostat installation shall be

carried out as follows:

1. Find a suitable place to fix the unit, which shall be

at 1.5 m from the floor and not exposed to any

heat source (sun, lamps, etc). Preferably don’t fix

the chrono thermostat to an external wall, which

may influence the temperature detecting;

otherwise use an insulation plate placed between

the unit and the wall (polystyrene, cork, etc).

In this way a better comfort can be guaranteed,

by avoiding frequent start and stop of the heater.

2. Use the provided slots on the unit for wall

fixing.

3. Fix the chrono-thermostat by means of two

FISCHER type screws.

4. The chrono-thermostat is delivered already

Connected to the heater by means of a cable

5 m long. The distance can be increased by

using cable extension with 0.75mm2 section

cables. Evaluate the use of shielded cables

if electromagnetic interference may occur.

However the maximum cable length allowed is 30

m.

31

SECTION E - SERVICE AND MAINTENANCE

8.1 FIRST START

The start-up of the heater shall be carried out by expert operator, trained on the gas-fired heater function and safety.

First check the data reported on the heater’s label match with the gas and power supply data; check the air combustion and exhaust ducts have been installed in compliance with the local regulation and there isn’t any obstacle to the air and exhaust flow along the duct till the terminals; check all the safety devices are correctly installed along the gas supply line.

Once started the unit, check the static and dynamic gas pressure, which shall be within the required range.

Then check the gas valve adjustment by means ofCO2 test, with reference to the table 16.

If the CO2 value isn’t within the required range, the operator shall find the proper adjustment of the valve.

The unit is delivered to run methane gas; if different type of gas is supplied, the operator shall first replace the gas nozzle with the proper one following the procedure described in chapters 8.2

8.2 HOW TO ADJUST THE GAS VALVE (or the combustion’s parameters)

Gas valve function

The gas valve installed in the MEC MIX heater is air/ gas 1:1 type, which maintains the gas delivery pressure

PINT equal to the sum of the detected air pressure and the offset value adjusted by the screw:

PINT = Pa+Os where Pa is the detected air pressure and Os is the offset value. This relation is shown in the graphic in picture 31.

The ratio Qa / Qg, where Qais the air flow rate and Qg is the gas flow rate, is kept constant by the valve as far as both the air and gas pressure drops versus the relative flow rate follow the same fluctuation.

GAS PRESSURE VS AIR PRESSURE

Air signal Pa

Fig. 30

Technical features

Gas type: 2° - 3° family

Toutdoor: 0 - 60 °C

Max inlet gas pressure: 60 mbar

Inlet/outletgas connection: thread G3/4 B ISO228

Pressure sampling plug: diam. 9 mm

Airdetection plug: diam. 7 mm

Protection class: IP 40 with NAC connector

Protection class: IP 44 with NAC 504 connector and gaske

32

GAS REGULATOR VALVE

LEGEND

1 SolenoidEV1

2 SolenoidEV2

3 Attack of inlet pressure

4 Attack of outlet pressure Pint

5 Addictional attack of outlet pressure

6 Air signal connection

7 Off set adjustment

8 Ratio adjustment (opt.)

9 Pilot outlet (optional)

10 Primary gas outlet

11 Side outlet

Fig. 31

Gas valve adjustment

The unit is delivered with the gas valve adjusted for running methane gas at the specified data.

If valve adjustment is required after checking the CO2 value, it shall be carried out as follow:

1. remove the cap A as shown in picture 33, to adjust the minimum gas flow rate

2. connect the CO2 analyser to the exhaust outlet

3. start the heater and by means of the control panel run it at the minimum heat output

4. read the CO2 detected and adjust the gas valve to have the CO2 within the required range

5. set the heater at the maximum heat output

6. check theCO2 value is still with in the requiredrange; if not adjust the regulator n.8, which refers to the maximum output

7. repeat from step 3 till the CO2 value is within the required range at both max and min heater’s output

The B regulator actually move up and down the line in the diagram in picture 34 whilst the n.8 regulator change the slope of the line (picture 35).

33

GAS VALVE ADJUSTMENT

A

B

Fig. 32

OFF SET ADJUSTMENT REGOLATION GAS - AIR

Air signal Pa Air signal Pa

Fig. 33 Fig. 34

Table n. 16

VALUES OF CO2 FOR GAS VALVE

ADJUSTMENT

METHANE 9,8% - 10,2 %

LPG 10,8 % - 11,2%

8.3 CHANGES FOR DIFFERENT GAS TYPE USED

In case of methane gas isn’t supplied but a different type of gas is used, it is required to adjust some devices on the gas line.

This operation shall be carried out by expert operator, trained on the gas-fired heater function and safety and only certified parts shall be used.

Once replaced the concerned items the gas valve adjustment shall be carried out, based on the CO

2 values shown in table n.16.

8.4 MAINTENANCE

Maintenance shall be carried out in accordance to the local regulation about gas-fired heating system.

However it is recommended to perform the unit maintenance and general cleaning of the unit (exhaust test, heat-exchanger and air blower grid).

Every year at least, before the cold season and the

Heater use.

Any maintenance work shall be carried out by qualified operator, trained on the gas-fired heater function and safety.

Generally, if the limit thermostat activates often, the above mentioned test and cleaning shall be performed.

However, before re-starting the heater always ensure the failure cause is removed.

34

35

A2B Accorroni E.G. s.r.l.

Via d’Ancona, 37 - 60027 Osimo (An) - Tel. 071.723991 r.a. - Fax 071.7133153

web site: www.accorroni.it - e-mail: [email protected]

36

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Key Features

  • Fixed power output for consistent heating
  • Compact design for easy installation in smaller spaces
  • Wall-mounted design saves floor space
  • Easy to operate and maintain
  • Suitable for both residential and commercial applications

Related manuals

Frequently Answers and Questions

What is the difference between the MEC MIX C and MEC MIX F?
The MEC MIX C is a condensation and modulation air heater, while the MEC MIX F is a fixed power air heater. The MEC MIX C is more energy-efficient than the MEC MIX F, but the MEC MIX F is more affordable.
What is the power output of the MEC MIX F?
The power output of the MEC MIX F varies depending on the model. The 35 model has a power output of 35 kW, the 50 model has a power output of 50 kW, the 70 model has a power output of 70 kW, and the 100 model has a power output of 100 kW.
What type of gas does the MEC MIX F use?
The MEC MIX F uses natural gas or LPG.

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