Mark Climate ECOFLEX Manuel utilisateur

Technical manual EN

MARK ECOFLEX

0660400_R09

INSTRUCTIONS FOR USER

If you have questions concerning the use of your boiler or heating system, please ask your

installer. It is in your own interest and that of the installer that you are aware of how to

operate your boiler and heating system safely and efciently.

Operation

Water, coming from the radiators or from the DHW unit is heated in the aluminium heat exchanger.

The CH or DHW pump guarantees circulation of water. The air needed for combustion is sucked in

by a rpm controlled fan. At low boilertemperatures the uegasses can be cooled down sufciently for

condensation of the water.This water is drained to the sewer via a built in syphon. This drainage may

never be blocked. A burnercontroller with built in micro-processor takes care of the electrical regulation

of the boiler.

Topping up

The built in manometer indicates if the waterpressure is sufcient. As soon as the waterpressure drops

below 1 bar topping up is necessary. If topping up becomes a regular occurrence, your installation should

be checked by an installer.

Disconnect from the main. Connect the lling hose to the cold water tap and to the ll and drain valve

of the boiler. Before tightning the coupling in the installation slowly ll the hose with water allowing

present air to escape. Now open the ll and drain valve and slowly ll the installation till a pressure

between 1.5 and 2.0 bar is reached. When nished connect again to the main.

Bleeding

To remove any air present in the heating system and boiler, bleeding is necessary. Disconnect from the

main. Open all the radiator valves. Bleed the air from all the radiators starting with the ones at the

lowest point in the system.After bleeding, check the water pressure and top up if required (if water

pressure has dropped below 1 bar). Connect to the main again.

Starting the boiler

Please ask your installer how to start the boiler. Depending on how your heating system is controlled,

this could be via an external timeclock, thermostat, switch or otherwise. Once the boilerVolt-free enable

contacts are closed, the boiler will commence its starting sequence.

Boiler ow temperature

The burner controller adjusts the owtemperature between 20 ° and 85 °C. The temperature setting

can be changed using the control panel.The installation manual provides the instructions for setting the

ow temperature.

DHW (Hot Water) temperature (if applicable)

From the factory the DHW temperature is set to a value of 60 °C. This set value can be changed into

a value between 35 and 65 °C with help of the buttons on the control panel. If the DHW device has a

thermostat the DHW temperature can be adjusted by setting this thermostat.

Warning

Incorrect installation, adjustment, alteration, repair or maintenance work may lead to material

damage or injury. All work must be carried out by certied, qualied professionals. If the appliance

is not positioned in accordance with the instructions, the warranty shall be rendered void. This

appliance is not intended for use by children or persons with a physical, sensory or mental

handicap, or who lack the required experience or expertise.Children must be supervised to

ensure that they do not play with the appliance.

Switching off the boiler

During summer time the room thermostat can be set to a lower value to turn off the boiler. During

winter or during a longer periode of absence this temperature never should be set to a lower value than

15 °C. Don’t switch of the power. During a period of frost all the radiators should be partly or totally

opened to avoid danger of freezing.

The integrated pump control wil activate the pump every 24 hours during a short period even if no

demand is present.This prevents the pump jamming. Only when work on the boiler is carried out may

the main electricity supply and the gas supply be turned off (your installer can show where these are

located).

Errors

If an error occurs rst check the following

• Is the room thermostat properly set?

• Is the boiler connected to the main? Power supply present?

• Is the gas valve opened?

• Are the radiator valves open?

• Is the waterpressure in the installation higher than 1 bar?

• Is the Installation bled thoroughly?

An error is indicated by a ashing code on the display. It is very important for the sake of a correct

diagnosis to mention this ashing code when calling your installer. Reset the burner controller by

pressing the OK button on the control panel. If the error more often occurs contact your installer.

Maintenance

A yearly inspection of the boiler to be done by your installer is necessary. The life-time and the reliability

of the installation are improved by doing so.The casing of the boiler can be cleaned with a soft cloth (no

abrasives). Never use solvents like thinner!

Caution

The air supply (for air needed for combustion) and the ue parts are essential parts for safe and efcient

functioning of the boiler. Changes on these systems by non qualied persons are not allowed just like the

settings of the gasvalve.The gas/air ratio is set to a lambda value of approximately 1.26.This corresponds

with a CO2 level of 9,3 % (full load).

For further information see installation manual.

The information in this document is subject to change without notice.The most recent version of this

manual is always available at www.markclimate.com/downloads.

1 DESCRIPTION BOILER

1 Terminal strip

2 Boiler controller (Maxsys)

3 Gas valve

4 Flow

5 Exhaust

6 Automatic air vent

7 Fan

8 Venturi

9 Return

10 Return NTC

11 Fill and drain valve

12 Water pressure sensor

13 Air supply

14 Syphon

15 Syphon pressure switch

16 Fluegas NTC

17 Inspection cover

18 Gas pipe

19 Overheat limiter Flow

20 NTC

21 Sight glass

22 Ignition and ionization electrode

23 Display LCD

24 Manometer

25 Burnerhood

26 Air pressure switch

27 Sump inspection cover

2 TECHNICAL DATA

168-5 210-6 252-7 294-8

Central heating

Nominal input max load (Hi) kW 168 210 252 290

Nominal input min load (Hi) kW 33,6 42 50,4 58,8

Nominal output max load 80-60 ºC kW 163,6 204,5 245,4 282,5

Nominal output min load 80-60 ºC kW 32,6 40,7 48,9 57

Efciency max load 80-60 ºC (Hi) % 97,4 97,4 97,4 98,4

Efciency min load 80-60 ºC (Hi) % 97 97 97 97

Efciency max load 50-30 ºC (Hi) %102,8 102,8 102,8 103,9

Efciency 30% load 30 ºC (return) (Hi) % 107,5 107,5 107,5 107,5

Flue gas

Temperature ue-gas max load 80-60 ºC ºC 70-75 70-75 70-75 70-75

Temperature ue-gas min load 80-60 ºC ºC 65-70 65-70 65-70 65-70

Flow ue-gasses at max load G25 m3/h 275 343 412 474

Flow ue-gasses at min load G25 m3/h 55 69 83 96

Maximum ue-resistance Pa 150 150 150 150

Emission CO (Gaskeur SV) ppm 38 39 37 35

Emission NOx (Gaskeur SV) ppm 29 29 29 29

NOx class

Types B23,C13,C33,C53,C63 yes yes yes yes

Gas

Also see 7.1

Gasow max load G25 m3/h 20,2 25,2 30,3 34,9

Gasow min load G25 m3/h 4,04 5,05 6,05 7,06

Gas ow max load G25.3 m3/h 19,75 24,65 29,6 34,05

Gas ow min load G25.3 m3/h 3,95 4,93 5,92 6,9

Gasow max load G20 m3/h 17,4 21,8 26,2 30,2

Gasow min load G20 m3/h 3,49 4,36 5,23 6,1

CO2content max load G25/G20/G25.3 % 9,3 9,3 9,3 9,3

CO2content min load G25/G20/G25.3 % 9,1 9,1 9,1 9,1

O2content max load G25 % 3,90 +0,10-0,30

O2content min load G25 % 4,30 +0,35-0,20

O2content max load G25.3 % 3,95 +0,10-0,35

O2content min load G25.3 % 4,35 +0,35-0,25

O2content max load G20 % 4,25 +0,10-0,35

O2content min load G20 % 4,60 +0,40-0,20

Water

Maximum ow temperature ºC 85 85 85 85

Content heat-exchanger ltr 16,9 21,3 24,7 30,2

Minimum/maximum operating pressure bar 0,8/6 0,8/6 0,8/6 0,8/6

Hydraulic resistance mbar 90 96 99 103

(DT20 nominal ow at full load 80-60 ºC

Maximum DT max load/min load ºC 25/35 25/35 25/35 25/35

Maximum waterow m3/h 14,1 17,6 21,1 24,3

Weight

Mass of heat exchanger with manifolds and sump kg 82 99 116 133

Total mass boiler kg 193 210 227 244

Sizes of casing

Width mm 602 602 602 602

Depth including connections mm 1463 1463 1463 1463

Height including chimney connection mm 1311 1311 1311 1311

Height mm 1307 1307 1307 1307

Electrical

Protection IP 00B 00B 00B 00B

Supply life+neutral V/Hz 230/50 230/50 230/50 230/50

Maximum power-consumption W 1150 1150 1150 1150

Standby power-consumption W 5 5 5 5

Fuse A 5 5 5 5

2.1 Component Matrix

Overview of main components used in EcoFlex-series

Part 168-5 210-6 252-7 294-8

Boiler control Honeywell Maxsys S4966V2052 S4966V2052 S4966V2052 S4966V2052

Display (user interface) DSP 49G2193 DSP 49G2193 DSP 49G2193 DSP 49G2193

Fan MVL 230VAC G1G170-AB31-42 G1G170-AB31-42 G1G170-AB31-42 G1G170-AB31-42

Gas-valve Honeywell 230VAC VR420VE5001-0000 VR425VE5022-0000 VR425VE5022-0000 VR425VE5022-0000

Venturi Honeywell VMU185 A1009 VMU300A1004 VMU335A1000 VMU335A1000

Texi Burner round 128mm Worgas L=341 L=425 L=509 L=593

Silencer air-inlet yes yes yes no

Silencer ue-gas round 200mm yes yes yes yes

NTC 12 k L=50 3 3 3 3

NTC 12 k OTC optional optional optional optional

Water low pressure device 1,6/0,8 bar yes yes yes yes

Pressure difference switch 40 Pa in and 25 Pa out yes yes yes yes

Syphon pressure difference switch 8,3 mbar out yes yes yes yes

Gas pressure switch : in 11,7-14,3 and out 8,6-11,4

mbar

yes yes yes yes

3 DIMENSIONS

INSTALLATION MANUAL DEJATECH FLOORFLEX

printdatum 15-08-19 DEJATECH tel. + 31 77 475 2270 Revision 10 subject to changes without prior notice 11/74

3 DIMENSIONS

The appliance is not to be used by children or persons with reduced physical, sensory or mental

capabilities, or lack of experience and knowledge. Children being supervised must not play with

the appliance.

In the case of failure or malfunction of the appliance, do not attempt to repair it yourself. Please contact

your installer. Repairs must only be carried out by qualied technicians. Failure to comply with these

requirements can compromise the safety of the appliance.

4 OPERATION

4.1 General

The EcoFlex is a oor standing boiler, equipped with a cast aluminium heat-exchanger. During heat

demand the controller activates the pump.The controller checks the air pressure switch (zero check)

and increases the fan speed to perform an airow-check. Once the air pressure switch closes the fan

speed increases to ignition speed and a 30 second pre-purge is performed.The water pressure sensor,

gas pressure switch and siphon pressure switch are checked.When all pressure switches are closed and

the water pressure is ok, the ignition is started.

The air needed for combustion is taken in from the outside (if room sealed) or the boiler house (type

B ue installation) by the fan. The air is transported through a gas/air mixing device creating a negative

pressure.This negative pressure is an indication of the amount of air being transported.The negative

pressure is supplied to the gas-valve by an internal tube.The gas valve automatically adjusts the amount

of gas that will be injected into the venturi and that will be mixed with the air-ow. This mixture is

supplied to the burner.

Ignition and ame-control of the mixture is done by two electrodes mounted on the burner hood.

Temperature control and safeguarding is done using 2 NTC’s. The boiler monitors the sensors

continuously in order to control operation and ensure safe operation.

4.2 Central Heating (CH)

4.2.1 On-off room thermostat

As standard the boiler is programmed for using an on-off room thermostat.The room thermostat has to

be connected to the pin nrs. 1+ 2 on the terminal strip. Open Therm will berecognized if connected on 1

+ 2. The desired ow temperature is adjustable, but as standard is set to 85 °C.

At CH heat request from the roomthermostat (and no DHW heat request present) the CH-pump

is activated after 10seconds. The controller will adjust the burner-input in such a way that a ow-

temperature of 85 °C towards the CH-circuit is achieved.

Warning: do not supply any voltage to these terminals as you may damage the controller

4.2.2 Optional 0-10V

The boiler may be controlled using a 0-10V DC signal. Connect the negative (0V DC) to No. 3, and the

positive (0-10V DC) to No.4 on terminal strip C2.

A loop of wire must be placed between the pin nrs. 1 and 2 of terminal strip C2.

In the technician menu, enable 0-10V in the advanced CH settings menu by setting, CH request to either

0-10V DC % or 0-10V DC SP.

4.2.2.1 0-10Vdc % power control

A value between 2 and 10Vdc generates a CH power demand proportional to this value between 0 and

100% (0% = minimum load, 100% = nominal load).The heat demand is removed when the control signal

falls below 1 volt. The setpoint of maximum ow temperature is set to 90°C.

In the user/technician menu , diagnostics, boiler information the actual voltage input and target power

are being displayed.

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