Ariston microGENUS II 24 MFFI, microGENUS II 28 MFFI, microGENUS II 31 MFFI User Manual

Download

microGENUS II 24 MFFI

microGENUS II 28 MFFI microGENUS II 31 MFFI

Installation and Servicing Instructions

Type C Boilers

G.C.N: 47-116-25 (24kW) G.C.N: 47-116-26 (28kW) G.C.N: 47-116-27 (31kW)

LEAVE THESE INSTRUCTIONS WITH THE END-USER

Country of destination: GB, IE

1. GENERAL INFORMATION PA

1.1 G

ENERAL INSTRUCTIONS PAGE.3

1.2 OVERALL VIEW PAGE.4

2. INSTALLATION PAGE.4

2.1

EFERENCE STANDARDS PAGE.

2.2 SITING THE APPLIANCE PAGE.5

2.3 OVERALL DIMENSIONS PAGE.6

2.4 CLEARANCES PAGE.6

2.5 MOUNTING THE APPLIANCE PAGE.6

2.6 E

LECTRICAL CONNECTION PAGE.7

2.7 GAS CONNECTION PAGE.8

2.8

CONNECTION PAGE.

TER

2.9 FLUE CONNECTION PAGE.10

2.10 C

2.11 D

2.12 R

2.13 ROOM THERMOST

ONTROL PANEL PAGE.18 IGITAL DISPLAY AND FAULT CODES PAGE.18 EMOVING THE FRONT PANEL PAGE.19

CONNECTION PAGE.19

2.14 ELECTRICAL/SYSTEM DIAGRAMS PAGE.20

2.15 WATER CIRCUIT DIAGRAM PAGE.21

3. COMMISSIONING PAGE.22

3.1 I

3.2 INITIAL STA RT-UP PAGE.23

3.3 OPERATIONAL ADJUSTMENTS PAGE. 23

3.4 C

3.5 PRODUCT OF COMBUSTION

3.6 BOILER SAFETY SYSTEMS PAGE.24

3.7 DRAINING THE SYSTEM PAGE.26

3.8 COMPLETION PAGE.26

3.9

3.10 INSTRUCTING THE END USER PAGE.26

NITIAL PREPARATION PAGE. 22

OMBUSTION ANALYSIS PAGE.24

DISCHARGE MONITORING PAGE. 24

PERA

TIONAL

CHECKS PAGE.

4. GAS ADJUSTMENTS PAGE.27

4.1 CHANGING THE TYPE OF GAS PAGE.27

4.2

DJUSTING

THE

GAS PRESSURES PAGE.

6.3.1 REMO

VING THE

COMBUSTION CHAMBER PAGE.35

6.3.2

EMOVING THE BURNER

AND

JETS PAGE.

6.3.3 REMOVING THE ELECTR

ODES

PAGE.35

6.3.4 REMOVING THE MAIN HEAT EXCHANGER PAGE.36

6.3.5 REMOVING THE AIR PRESSURE SWITCH PAGE.37

6.3.6 REMO

6.4

VING THE

CCESS TO THE GAS VALVE PAGE.

FAN PAGE.38

6.4.1 REMOVING THE SPARK GENERATOR PAGE.38

6.4.2 R

6.5 ACCESS

EMOVING THE GAS VALVE PAGE.39

TO THEWATER

CIRCUIT PAGE.39

6.5.1 REMOVING THE D.H.W. (SECONDARY)

EXCHANGER PAGE.39

6.5.2 REMOVING THE PUMP PRESSURE SWITCH PAGE.40

6.5.3 REMO

VING THE

SAFETY

VALVE PAGE.41

6.5.4 R

EMOVING THE AUTOMATIC

AIR VENT PAGE.41

6.5.5 REMOVING THE PUMP PAGE. 42

6.5.6 REMOVING THE PRESSURE GAUGE PAGE. 43

6.5.7 REMOVING THE EXPANSION VESSEL PAGE.43

6.5.8 REMOVING THE OVERHEAT THERMOSTAT PAGE.44

6.5.9 REMOVING THE C.H. TEMPERATURE PROBE (N.T.C.) PAGE. 44

6.5.10 REMOVING THE D.H.W. TEMPERATURE SENSOR (N.T.C.) PAGE.45 R

6.5.11

VING THE DIVERTOR

EMO

VALVE ACTUATOR PAGE.45

6.5.12 REMOVING THE D.H.W.

SWITCH PAGE.

THE

6.6

CCESS

CONTROLSYSTEM PAGE.

6.6.1 CHECKING THE FUSES PAGE.46

6.6.2

6.6.3

R R

EMO EMO

VING THE VING

.C.B. P

THE

TIME CLOCK PAGE.

45 46

5. MAINTENANCE PAGE.32

6. SERVICING INSTRUCTIONS PA

6.1 R

6.2 T

6.2.1 REMOVING THE FRONT

6.2.2 R

6.2.3 R

6.3 ACCESS TO THE COMBUSTION

EPLACEMENT OF PARTS PA

O GAIN GENERAL ACCESS PAGE.33

PANEL PAGE.33

EMOVING THE SEALED

CHAMBER FRONT PANEL PAGE.

EMOVING THE SIDE

PANELS PAGE.34

CHAMBER PAGE.

7. FAULT FINDING PAGE.49

7.1

FINDING GUIDE

(FLOW-CHARTS)PAGE.49

8. EXPLODED VIEW PA

8.1 SHORT SPARES LIST PAGE.53

9. TECHNICAL INFORMATION PAGE.54

1. GENERAL INFORMATION

This manual is an integral and essential part of the product. be consulted b

Please carefully read the instructions and notices about the unit contained in this manual, as they provide important information regarding the safe installation, use and maintenance of the product.

For operating instructions please consult the separate Users Manual.

It should be kept with the appliance so that it can

y the user and our authorised personnel.

1.1 GENERAL INSTRUCTIONS

Read the instructions and recommendations in these Installation and Servicing Instructions carefully to ensure proper installation, use and maintenance of the appliance.

eep this manual in a safe place.You may need it for your

K own reference while Servicing Technicians or your installer may need to consult it in the future.

This is a combined appliance for the production of central heating (C.H.) and domestic hot water (D.H.W.) and is intended for use in domestic properties.

This appliance which it is designed. The manufacturer declines all liability for damage caused by improper or negligent use.

No asbestos or other hazardous materials have been used in the fabrication of this product.

Before connecting the appliance, check that the information shown on the data plate and the table in section 9 comply with the electric, water and gas mains of the property.You will find the data plate on the reverse of the control panel. The gas with which this appliance operates is also shown on the data label inside the boiler casing.

must be used only for the purpose for

Do not install this appliance in a damp environment or

close to equipment which spray water or other liquids.

Do not place objects on the appliance. Do not allow children or inexperienced persons to use

the appliance without supervision. If you smell gas in the room,

switches, use the telephone or any other object which

might cause spar Open doors and windows immediately to ventilate the room. Shut the gas mains tap (at or adjacent to the gas meter) or the valve of the gas cylinder and call your Gas Supplier immediately If you are going away for a long period of time, remember to shut the mains gas tap or the gas cylinder valve.

Always disconnect the appliance either by unplugging it from the mains or turning off the mains switch before cleaning the appliance or carrying out maintenance.

In the case of faults or failure, switch off the appliance and turn off the gas tap. Do not tamper with the appliance. For repairs, call your local Authorised Servicing Agent and request the use of original spare parts. For inguarantee repairs contact MTS (GB) Limited.

do not turn on or off light

24 23

22 21

1918171615

1.2 OVERALL VIEW

LEGEND:

FIG. 1.0

2. Air Intake for Twin Pipe Flue Systems

3. Fan

4. Combustion Chamber Hood

6. Overheat Thermostat

8. Combustion Chamber Insulation Panel

9. Burner

10. Detection Electrode

11. Ignition Electrodes

12. Motorised Valve

13. Domestic Hot Water Temperature Probe

14. Drain Valve

15. Low Water Pressure Switch

16. Secondary Heat Exchanger

17. Gas Valve

18. Spark Generator

19. Cold Water Inlet Filter

20. Pump (w/auto air vent)

21. Safety Valve

22. D.H.W. Flow Switch

23. Combustion Chamber

24. Central Heating Return Temperature Probe

25. Expansion Vessel

26. Air Pressure Switch

27. Combustion Analysis Test Point

Flue Manifold

Main Heat Exchanger

Central Heating Flow Temperature Probe

2. INSTALLATION

2.1 REFERENCE ST

The technical inf herein belo

w are intended for the installer / Servicing

ANDARDS

ormation and instructions provided

Technician so that the unit may be installed and serviced correctly and safely.

The appliance is only suitab

le for installation in GB and IE and should be installed in accordance with the rules in force

In GB, the installation must be carried out by a CORGI registered installer. It must be carried out in accordance with the relevant requirements of the Gas Safety (Installation and Use) Regulations, the appropriate Building Regulations either The Building Regulations (Scotland), Building Regulations (Northern Ireland), The Water Fittings Regulations or Water byelaws in Scotland.

, it is necessary to comply with the Water Supply

In GB (Water Fittings) Regulations 1999 (or for Scotland, The Water Byelaws 2000, Scotland).

The microGENUS II is an Approved Product under the Water Regulations.

To comply with the Water Regulations your attention is drawn to The Water Regulations guide, published by the Water Regulations Advisory Service (WRAS) gives full details of the requirements. In IE, the requirements given in the current edition of I.S.813 and the current Building Regulations must be followed.

Installation should also comply with the follo

wing British Standard Codes of Practice In the Republic of Ireland in accordance with the current

BS 7593:1992 Treatment of water in domestic hot water

central heating systems

BS 5546:1990 Installation of hot water supplies for

domestic purposes BS 5440-1:2000 Flues BS 5440-2:2000 Air supply BS 5449:1990 Forced circulation hot water systems BS 6798:1987 Installation of gas fired hot water boilers

of rated input not exceeding 60kW BS 6891:1989 Installation of low pressure gas pipe up to

28mm BS 7671:2001 IEE wiring regulations BS 4814:1990 Specification for expansion vessels BS 5482:1994 Installation of L.P.G.

2.2 SITING THE APPLIANCE

The appliance ma area, although par requirements of, in GB the current I.E.E. Wiring Regulations, in Scotland, the electrical provisions of the Building Regulations applicable in Scotland, and for IE the current edition of I.S. 813 and the current ETCI rules. With respect to the installation of the combined appliance in a room containing a bath or shower, the location of the boiler in a room containing a bath or shower should only be considered if there is no alternative.

Where a room-sealed appliance is installed in a room containing a bath or shower reference must be made to the relevant requirements. In GB this is the current I.E.E. Wiring Regulations and Building Regulations, in IE reference should be made to the current edition of I.S. 813 and the current ETCI rules.

If the boiler is to be fitted into a building of timber frame construction, reference should be made to the current edition of the Institution of Gas Engineers Publication IGE/UP/7 (Gas Installations in Timber Framed Housing).

The location must permit adequate space for servicing and air circulation around the appliance as indicated in Section 2.4. The location must permit the provision of an adequate flue and termination. For unusual locations special procedures may be necessary. BS 6798-1987 gives detailed guidance on this aspect. A compartment used to enclose the appliance must be designed specifically for this purpose. No specific

entilation requirements are needed for the installation

v within a cupboard. This appliance is not suitable for outdoor installation.

The type C appliances (in which the combustion circuit, air vent intake and combustion chamber are air-tight with respect to the room in which the appliance is installed) can be installed in any type of room.

Secondary ventilation is not required with this boiler. The boiler m per

ust be installed on a solid, non-comb

manent wall to prevent access from the rear.

y be installed in any room or indoor

ticular attention is drawn to the

ustib

Building Regulations, the current ETCI rules for electrical installation and with the following Codes of Practice:

I.S. 813 Domestic Gas Installations

FIG. 2.1

2.3 OVERALL DIMENSIONS

LEGEND:

A = Central Heating Flow (3/4”) B = Domestic Hot C = Gas Inlet (3/4”) D = Domestic Cold E = Central Heating Return (3/4”)

Water Outlet (1/2”)

Water Inlet (1/2”)

FIG. 2.2

2.4 CLEARANCES

In order to allow access to the interior of the boiler for maintenance purposes, the boiler must be installed in compliance with the minimum clearances indicated in

FIG. 2.2

2.5 MOUNTING THE APPLIANCE

After removing the boiler from its packaging, remove the template from the separate box containing the connection kit.

Pay particular attention to any test water that

may spill from the appliance.

Place the template in the position the appliance is to be mounted and after ensur to drill the holes for the hanging bracket, connection kit and flue pipe(s) NB: F flue installation please ref CONNECTION. (If the appliance is to be fitted on a wall of combustible material, the wall must be protected by a sheet of fireproof mater If the appliance is to be fitted into a timber framed building, guidance should be sought from the Institute of Gas Engineers document R

ill the w

2.5.1. the connections kit, position the hanging bracket and

ing it is hanging squarely

ther information relating to the

or fur

er to Section 2.9

ial).

EF: IGE/UP/7.

all and plug using those supplied with

, use it

LUE

secure with the wall screws supplied, assemble the connection kit and secure to the w recommended that a spirit level be used to position the appliance to ensure that it is perf

2.5.2. Position the appliance on the hanging bracket and connect the connection kit to the boiler connections (see also Sections 2.7 Gas Connections, 2.8 Water Connections & FIG. 2.3).

all.

NOTE: It is highly

ectly level.

2.6 ELECTRICAL CONNECTION

For safety purposes, have a competent person carefully check the electrical system in the property, as the manufacturer will not be held liable for damage caused by the failure to earth the appliance properly or by anomalies in the supply of power. Make sure that the residential electrical system is adequate for the maximum power absorbed by the unit, which is indicated on the rating plate. In addition, check that the section of cabling is appropriate for the power absorbed by the boiler.

The boiler operates with alternating current, as indicated in the Technical Information table in Section 10, where the maximum absorbed power is also indicated. Make sure that the connections for the neutral and live wires correspond to the indications in the diagram. The appliance electrical connections are situated on the reverse of the control panel.

FIG. 2.3

IMPORTANT!

In the event that the power supply cord must be changed, replace it with one with the same specifications. Note: The diagrams for the electrical system are indicated in section 2.13.

Warning, this appliance must be earthed.

External wiring to the appliance must be correctly earthed and polar person in accordance with rele in GB reference should be made to the current I.E.E. Regulations and applicable local regulations, in Scotland, the electr applicable in Scotland, and for IE the current edition of I.S. 813 and the current ETCI rules. The appliance is supplied with a fly-lead already connected, this must be connected to a 220-240v supply fused at 3A and must facilitate complete electrical isolation of the appliance, by the use of a fused double pole isolator ha in all poles or alternatively, by three pin plug and unswitched shuttered socket outlet both complying with BS 1363. The point of connection to the Electricity supply must be readily accessible and adjacent to the appliance unless the appliance is installed in a bathroom when this must be sited outside the bathroom (see section 2.2).

ised and must be carried out by a competent

ant regulations and r

ical pro

visions of the Building Regulations

ving a contact separation of at least 3 mm

means of a 3 A fused

ules,

Should external controls be required, the design of the

y a

en b

nal electr

xter

e competent person, see Section 2.13 f

mation.

inf

ical circuits should be under

tak or fur

ther

2.7 GAS CONNECTION

The local gas region contractor connects the gas meter to the ser

vice pipe. If the gas supply for the boiler serves other appliances ensure that an adequate supply is available both to the boiler and the other appliances when they are in use at the same time. Pipe work must be of an adequate size. Pipes of a smaller siz

e than the boiler inlet connection should not be used. The gas installation should also be in accordance with the relevant standards. In GB this is BS 6891, and in IE this is the current edition of I.S. 813.

2.8 WATER CONNECTIONS

VIEW OF THE BOILER CONNECTIONS

LEGEND:

A = Central Heating Flow B = Domestic Hot Water Outlet

E E

C = Gas Inlet D = Domestic Cold Water Inlet E = Central Heating Return F = Safety Valve Outlet G = Drain valve

FIG. 2.4

IG. 2.5

KT007A

CENTRAL HEATING

Detailed recommendations are given in BS 6798:1987 and BS 5449-1:1990, the following notes are given for general guidance.

PIPE WORK:

Copper tubing to BS EN 1057:1996 is recommended for water pipes

. Jointing should be either with capillary soldered or compression fittings. Where possible pipes should have a gradient to ensure air is carr

ied natur

ally to air release points and w

ater flows naturally to drain taps. The appliance has a built-in automatic air release valve, however it should be ensured as far as possible that the appliance heat exchanger is not a natural collecting point for air. Except where providing useful heat, pipes should be insulated to pre

vent heat loss and avoid freezing. Particular attention should be paid to pipes passing through ventilated spaces in roofs and under floors.

ASS

BY-P

The appliance includes an automatic by-pass valve, which protects the main heat exchanger in case of reduced or interrupted water circulation through the heating system, due to the closing of thermostatic valves or radiators.

SYSTEM DESIGN:

This boiler is suitable only for sealed systems.

DRAIN COCKS:

These must be located in accessible positions to permit the draining of the whole system and should be fitted at all low points. The taps must be at least 15mm nominal

e and manufactured in accordance with BS 2870:1980.

siz

SAFETY VALVEDISCHARGE:

The discharge should terminate facing downward on the

xterior of the building in a position where discharging

e (possibly boiling water & steam) will not create danger or

uisance, but in an easily visible position, and not cause

n damage to electrical components and wiring. The discharge must not be over an entrance or a window or any other type of public access.

AIR RELEASE POINTS:

These m

ust be fitted at all high points where air naturally collects and must be sited to facilitate complete filling of the system. The appliance has an integral sealed expansion vessel to accommodate the increase of water volume when the system is heated. It can accept up to 7 litres (1.3 gal) of expansion water. If the heating circuit has an unusually high water content, an additional sealed expansion vessel must be fitted, for GB refer to BS 7074 part 1 and for IE, refer to the current edition of I.S. 813.

MAINS WATER FEED - CENTRAL HEATING:

A method for initially filling the heating system is supplied with the connection kit. The filling loop is connected between the cold water inlet and the central heating flow connections, and incorporates a non-return valve. To operate the filling loop, it is necessary to open both quarter turn handles, once the required pressure has been achieved, close both handles and disconnect the hose in accordance with water byelaws. N

OTE: The

installer should ensure that there are no leaks as frequent filling of the heating system can lead to premature scaling of the main exchanger and failure of hydraulic components.

DOMESTIC WATER:

The domestic water must be in accordance with the relevant recommendation of BS 5546:1990. Copper tubing to BS EN 1057:1996 is recommended for water carrying pipe work and must be used for pipe work carrying drinking water, a scale reducer should also be used to reduce the risk of scale forming in the domestic side of the heat exchanger.

VR003A

RESIDUAL PUMP HEAD,DESIGNED TEMP RISE 20oC

28/31 kW

24 kW

2.9 FLUE CONNECTIONS

FLUE SYSTEM

The pro made in GB this must be in accordance with BS 5440-1,

or IE recommendations are given in the current edition of

f I.S.813. The appliance must be installed so that the flue terminal is exposed to outside air. The terminal must not discharge into another room or space such as an outhouse or lean-to. It is important that the position of the terminal allows a free passage of air across it at all times The terminal should be located with due regard for the damage or discolouration that might occur on buildings in the vicinity and consideration must be given to adjacent boundaries. In cold or humid weather water vapour may condense on leaving the flue terminal. The effect of such “pluming” must be considered. If the terminal is less than 2 metres above a balcony, above ground or above a flat roof to which people have access, then a suitable terminal guard must be fitted. When ordering a terminal guard, quote the appliance model number. A suitable terminal guard is available from:

vision for satisfactory flue termination must be

FIG. 2.6

FU010D

NOTE:THE FLUE MUST NOT TERMINATE IN A PLACE LIKELY TO

CAUSE NUISANCE

TOWER FLUE COMPONENTS Morley Road Tonbridge Kent TN9 1RA

The minimum acceptable spacing from the terminal to obstructions and ventilation openings are specified in FIG.

2.6.

ERMINALPOSITION

A - Directly above or below an openable window

or other opening

B - Below gutters, solid pipes or drain pipes 75

es 200

w ea

Belo

Below balconies or car-port roof 200

D E - From vertical drain pipes and soil pipes 150 F - From internal or external corners 300 G - Above ground or balcony level 300

From a surface facing a terminal 600

I - From a terminal facing a terminal 1200

J - From an opening in the car port

(e.g. door, window) into dwelling 1200 Vertically from a terminal in the same wall 1500

K L - Horizontally from a terminal in the same wall 300

izontally from an opening window 300

Hor

M N - Fixed by vertical flue terminal

300

Ø 60/100 mm

FITTING

THECOAXIAL

or Telscopic, Vertical Flue and Twin Pipe Instructions

FLUE (HORIZONTAL)

see page 12)

CONTENTS: 1X SILICONE O-RING (60mm) 1X ELBOW (90O) 2X WALL SEALS (INTERNAL &

XTERNAL)

1X ALUMINIUM FLUE PIPE INCLUDING TERMINAL (1 METRE 60/100) 2X FLUE CLAMPS 8X SCREWS 2X FOAM SEALS

Once the boiler has been positioned on the wall, insert the elbow into the socket required position.

NOTE: It is possible to rotate the elbow

(FIG 2.7) and rotate to the

360oon its vertical axis.

FIG. 2.7

FU002A/Rev.1

Using the flue clamps, seals and screws supplied

(FIGS

2.7 AND 2.9) secure the elbow to the boiler.

The 1 metre horizontal flue kit (705958) supplied is

le for an exact

suitab

X dimension of 823mm, and the

750mm horizontal flue kit (705785) is suitable for an exact X dimension of 573mm.

Measure the distance from the face of the external wall to the face of the flue elbow (X - FIG 2.7), add 22 mm to this measurement, you now have the total length of flue required (including the terminal), this figure must now be subtracted from 860mm, you now have the total amount to be cut from the plain end of the flue.

Cut the flue to the required length ensuring that the distance between the inner and the outer flue is maintained (FIG 2.10).

FIG 2.8

FIG 2.9

FIG 2.10

e.g. X = 508mm + 22mm = 530mm

860 - 530 = 330mm (Length to be cut from the plain

end of the flue).

Once cut to the required length, ensure that the flue is free from burrs and reassemble the flue. If fitting the flue from inside of the building attach the grey outer wall seal to the flue terminal and push through the flue through the

, once the wall seal has passed through the hole, pull

hole the flue back until the seal is flush with the wall.

natively, the flue can be installed from outside of the

Alter building, the grey outer seal being fitted last.

WARNING

THE FLUE IS LONGER THAN

RESTRICTOR (FIG. 2.11). IF THE FLUE IS BETWEEN 0-1 METRE

THE RESTRICTOR REMAINS FITTED

1 METRE, REMO

VE THE

SEE TABLE 2.1 (PAGE 17).

FIG 2.11

FITTING THE TELESCOPIC FLUE KIT (HORIZONTAL)

CONTENTS: 1X SILICONE O-RING (60

X ELBOW (90

)

mm)

2X WALL SEALS (INTERNAL &EXTERNAL) 1X ALUMINIUM FLUE PIPE INCLUDING TERMINAL (TELESCOPIC 60/100) 2X FLUE CLAMPS 8X SCREWS 2X FOAM SEALS

The telscopic flue is suitable for use with an exact minimum X dimension of 270mm and an exact maximum X dimension 470mm.

IMPORTANT!! Do not extend the telescopic flue to an X dimension of more than 470mm. If longer lengths are required use extension pieces as necessary. Under no circumstances must the flue be cut.

The wall must then be made good around the flue (ensuring a fall of 1ois maintained away from the boiler to the flue terminal). Once made good, place the inner (white) wall seal over the flue and push up to the w

all, secure the flue to the

elbow by using the clamp supplied.

FIG 2.12

or each additional 90oelbo

w 1 metre m

ust be removed from the total flue length (maximum 4 metres including the 1st elbow). For each additional 45oelbow 0.5 metre must be subtracted from the total flue length (

FIG 2.13).

FITTING THE COAXIAL FLUE (VERTICAL)

(For Twin Pipe Instructions see page 13)

CONTENTS: 1X SILICONE O-RING (60mm) 1X ELBOW (90O) 2X WALL SEALS (INTERNAL &EXTERNAL) 1X ALUMINIUM FLUE PIPE INCLUDING TERMINAL (TELESCOPIC 60/100) 2X FLUE CLAMPS 8X SCREWS 2X FOAM SEALS

The vertical flue kit is supplied with a specially designed weather proof terminal fitted, it can be used either with a flat roof or a pitched roof. (see FIGS 2.12, 2.13).

FIG 2.13

Vertical flue kits maximum and minimum useable

The lengths with both flat and pitched roof flashings are indicated in (Figs.

2.14 & 2.15).

Before proceeding to fit the flue, ensure that the maximum flue length has not been exceeded and that all

ws and bends have been taken into consideration,

elbo the maxim

um flue length is 5 metres, for each additional

elbow 1 metre must be subtracted from the total flue

length, and for each 45o0.5 metres must be subtracted from the total flue length (the offset and height of 2 x

45ocan be seen in Fig. 2.16).

Mark the position of the flue hole in the ceiling and/or roof

(see FIG. 2.14 for distance from wall to the centre of the flue).

NOTE:MAX LENGTH = a+a+a +

b+b = a+a+a+0.5+0.5 COMBINED LENGTH NOT

TO EXCEED 5m

Cut a 125mm diameter hole through the ceiling and/or roof and fit the flashing plate to the roof. Should it be necessary to cut the flue DO NOT cut the outer white air inlet tube, cut the aluminium exhaust flue 6mm longer than the outer white air tube when used at minimum length.

DO NOT cut more that 250mm from the

inner aluminium exhaust flue.

To connect the vertical flue kit directly to the boiler, place the adaptor

(see FIG 2.12) (supplied with vertical flue kit)

onto the exhaust manifold and secure with the clamp, the vertical flue kit must then be inserted through the roof flashing, this will ensure that the correct clearance above the roof is provided as the terminal is a fixed height.

Should extensions be required, they are available in 1

(Part No. 705786), 500mm (Part No. 705790) and

metre 160mm lengths (Part No. 705812), they must be connected directly to the boiler and secured with the clamp supplied before connecting the adaptor to allow the vertical flue kit to be fitted. In the event that extension pieces need to be shortened, they the male end and it m

ust be ensured that the distance

between the inner and outer flue are kept

must only be cut at

(Fig. 2.10).

FIG 2.14

When utilising the vertical flue system, action must be taken to ensure that the flue is supported adequately to prevent the weight being transferred to the appliance flue connection. When the flue passes through a ceiling or wooden floor, there must be an air gap of 25mm between any part of the flue system and any combustible material. The use of a ceiling plate will facilitate this. Also when the flue passes from one room to another a fire stop must be fitted to prevent the passage of smoke or fire, irrespective of the structural material through which the flue passes.

FITTING

Where it is not possib distance per be used b and using the aper the comb

THE

FLUE (TWIN PIPE)

minate the flue within the

, the twin flue pipe can

mitted f

le to ter

or coaxial flues

y fitting a special adaptor to the flue connector

ture f

ustion chamber

or the air intak

e located on top of

Considerations necessary for twin flue installation;

It is most important to avoid any possible condense

ormation entering the appliance.

FIG 2.15

WARNING

F THE FLUE IS LONGER THAN 1 METRE, REMOVE THE

RESTRICTOR METRE THE RESTRICTOR REMAINS FITTED.

(FIG. 2.11). IF THE FLUE IS BETWEEN 0-1

SEE TABLE 2.1 (PAGE 17).

According to Table 2.1

(Page 17) decide if condensation

will form within the flue. If yes, there are two options;

Where condense will form but can be negated with

insulated flue, install insulated the flue with a fall of 5mm in every metre away from the boiler.

2) The exhaust flue will have a fall of 3oback to the boiler

and a suitable trap will be fitted on the exhaust as close to the boiler as possible, condense will then be suitably disposed of.

Where the flue runs through cold spots, i.e. loft areas, condense is likely to be formed, therefore a fall back to the boiler and a trap is required. Always ensure that the flue is adequately supported, avoiding low points. (MTS supply suitable clamps as Part No. 705778).

To utilise the air intake it is necessary to:

Remove the ‘knockout’ of the air intake by cutting it with a suitable knife

(FIG. 2.17).

Insert the elbow/flue pipe into the air intake until it stops.

Minimum offset distance when using 2x 45obends

The twin flue pipes can be fitted with or without additional elbows and need no clamps, simply ensure that the red oring is inserted in the female end of the flue pipe and push the extension piece fully into the previous section of flue pipe or elbow, check that the o-ring is not dislodged when assembling the flue.

Twin pipe can also be converted back to Coaxial flue to enable vertical termination with a coaxial kit by using the pipe br

idge (Twin - Coaxial Adaptor - Part No. 705767). When running the twin flue pipe vertically, a condense trap must always be used on the exhaust pipe.

It is not recommended that the pipe bridge for horizontal termination, however in the unlikely event that this proves to be a necessity it is extremely important that the entire

flue has a fall of 3

back to the boiler, is suitably trapped and where the 60mm inner flue of the concentric terminal connects to the pipe bridge, this point must be adequately sealed with silicone sealant to avoid condense leakage at this point.

NOTE: Vertical twin flue installations must have a trap on

the exhaust. MTS supply a suitable condense

art No. 705774 and recommend that this be

ap P

used in the e condense

ent that the flue ma

y not f

FIG 2.16

When siting the twin flue pipe

, the air intak

e and e

xhaust terminals must terminate on the same wall, the centres of the terminal centres

must be a minimum of 280 mm apart

FIG 2.17

IMPORTANT!!! WHERE CONDENSE WILL FORM WITHIN THE FLUE SYSTEM,

ENSURE THERE IS A FALL BACK TO THE BOILER OF 3OAND A SUITABLE TRAP IS FITTED AS CLOSE TO THE BOILER AS POSSIBLE

. MTS SUPPLY A SUITABLE COLLECTOR PART NO. 705798 OR A CONDENSATE DISCHARGE T WITH BUILT IN TRAP PART NO. 705774.

and the air intake must not be sited above the exhaust ter

minal

(ref

er to F

2.21).The air intake pipe can be

IG.

run horizontally, however, the terminal and the final 1 metre of flue m

ust be installed with a fall away from the

boiler to avoid rain ingress.

It is also strongly recommended that the air intake pipe

un be constructed of insulated pipe to prevent condense

orming on the outside of the tube.

The maximum permissible flue length for twin flue is dependent on the type of run used.

For flue runs with the intake and exhaust pipes under the same atmospheric conditions (T

YPE 4) the maximum

length is 60 metres (28kW), 46 metres (28kW) and 47 metres (31kW). For runs with the terminals under different atmospheric conditions (TYPE 5) the exhaust terminal must extend 0.5 metres above the ridge of the roof (this is not obligatory if the exhaust and air intake pipes are located on the same side of the building). For

YPE 5 also, the maximum permissible combined length is

T 59 metres (24kW), 48 metres (28kW) and 42 metres (31kW). Flue types are shown on Page 16 (FIG. 2.20).

The maximum length is reached by combining the total lengths of both the air intake and exhaust pipes. Therefore a maximum length of 40 metres for example, will allow a flue run of 20 metres for the air intake and 20 metres for the exhaust pipes, also for each 90oelbow 1.3 metres must be subtracted from the total length and for each 45oelbow 1 metre must be subtracted from the total flue length. Some of the acceptable flue configurations are detailed on page 16

(FIG. 2.20).

FIG 2.18

For further information relating to flue runs not illustrated, please contact the Technical Department on 01494

539579.

FIG 2.19

EXHAUST

AIR INTAKE

AIR INTAKE MUST NOT BE

FITTED ABOVE THE EXHAUST

TYPE 1

TYPE 2

TYPE 3

TYPE 4

TYPE 5

NOTE: DRAWINGS ARE INDICATIVE OF FLUEING OPTIONS ONLY.

FIG. 2.20

FIG 2.21

NOTE:WHERE 280MM CENTRES CANNOT BE ACHEIVED,THE EXHAUST TERMINAL

CAN BE EXTENDED TO PROTRUDE FROM THE WALL BY 300MM.

TABLE 2.1

24 MFFI

Coaxial

Systems

ø 60/100

Twin Pipe

Systems

ø 80/80

28 MFFI

Coaxial

Systems

ø 60/100

Exhaust

Type

TYPE 1 TYPE 2

YPE 3

Exhaust

Type

TYPE 4

YPE 5

Exhaust

Type

TYPE 1 TYPE 2 TYPE 3

Exhaust

Type

Use the

ø 41 mm

Restrictor

Between

500 mm - 1 m

Use the

ø 41 mm

Restrictor

Between

1m - 20 m

Between

1m - 25 m

Use the

ø 43 mm

Restrictor

Between

500 mm - 1 m

Use the

ø 43 mm

Restrictor

Do not use the

Restrictor

een 1m - 4m

Betw

Between 1m - 5m

Do not use the

Restrictor

Between

20 m - 60 m

Between

25 m - 59 m

Do not use the

Restrictor

Between 1m - 4m

Between 1m - 5m

Do not use the

Restrictor

Maximum

Flue

Length

4 m

5 m

Maximum

Flue

Length

60 m

59 m

Maximum

Flue

Length

4 m

5 m

Maximum

Flue

Length

Risk of Condensation Forming

T APPLICABLE

NOT APPLICABLE

Risk of Condensation Forming

Standard Twin Pipe

After:

3 m

with a

ø 41 mm restrictor

3 m

with a ø 41 mm restrictor

4 m

without a ø 41 mm

restrictor

4 m

without a ø 41 mm restrictor

Insulated Twin Pipe

After:

3 m

with a

ø 41 mm restrictor

3 m

with a ø 41 mm restrictor

Risk of Condensation Forming

NOT APPLICABLE

Risk of Condensation Forming With:

Standard Twin Pipe

After:

Insulated Twin Pipe

After:

With:

4 m

without a ø 41 mm

restrictor

4 m

without a ø 41 mm restrictor

Twin Pipe

Systems

ø 80/80

31 MFFI

Coaxial

Systems

ø 60/100

Twin Pipe

Systems

ø 80/80

TYPE 4

YPE 5

Exhaust

Type

TYPE 1 T

YPE 2 YPE 3

Exhaust

Type

TYPE 4

YPE 5

Between

1m - 14 m

Between

1m - 21 m

Use the

ø 42 mm

Restrictor

Between

500 mm - 1 m

Use the

ø 42 mm

Restrictor

Between

1m - 4 m

Between

1m - 11.5 m

Between

14 m - 46 m

Between

21 m - 48 m

Do not use the

Restrictor

Between 1m - 4m

Between 1m - 5m

Do not use the

Restrictor

Between

4 m - 47 m

Between

11.5 m - 42 m

46 m

48 m

Maximum

Flue

Length

4 m

5 m

Maximum

Flue

Length

47 m

42 m

4 m

with a

ø 43 mm restrictor

4 m

with a

ø 43 mm

ictor

restr

5 m

without a ø 43 mm

restrictor

5 m

without a ø 43 mm restrictor

4 m

with a ø 43 mm

restrictor

4 m

with a ø 43 mm restrictor

Risk of Condensation Forming

NOT APPLICABLE

Risk of Condensation Forming With:

Standar

2 m

with a

ø 42 mm

ictor

restr

7.4 m

with a

ø 42 mm

ictor

restr

Twin Pipe

After:

without a ø 42 mm

restrictor

without a ø 42 mm restrictor

7.5 m

7.4 m

Insulated

2 m

with a ø 42 mm

restrictor

7.4 m

with a ø 42 mm restrictor

After:

5 m

without a ø 43 mm

restrictor

5 m

without a ø 43 mm restrictor

win Pipe

7,5 m

without a ø 42 mm

restrictor

7,4 m

without a ø 42 mm

ictor

restr

Where there is no risk of condense forming (and,

therefore no requirement for a condense collector), ensure a minimum fall of 5mm per metre a

way from

the appliance.

NOTE:UNDER SOME CIRCUMSTANCES, CONDENSE MAY FORM AT

TERMINAL

THE PAID WITH REGARD TO POSSIBLE CONDENSE DRIPPING

TERMINAL

THE

, SPECIAL

UST

EXHA

TTENTION

MUST

IJK

FR020A

* Warning the flue analysis mode must only be selected by a

qualified service engineer.

FIG. 2.22

2.10 CONTROL PANEL

LEGEND:

On/Off Button

A B - Domestic Hot Water Temperature Adjustment C - Central Heating Temperature Adjustment D - Reset Button/Flue Test analysis mode* E - Comfort Mode Selector F - Summer Mode LED (Green)

Ignition/Overheat Lockout LED (Red)

G H - Central Heating (Winter Mode) LED (Green) I - Digital Display (Fault Code/Water Temperature) J - Time Clock K- Central Heating System Pressure Gauge

2.11 DIGITIAL DISPLAY AND FAULT CODES

DISPLAY CAUSE

AA001

AA003

AA997 AA998 AA999

EE002 EE004

EE005

EE006

EE007

EE008

EE009

EE220 EE221

EE333

EE334

EE999

7 8 9

2 4

0 1

No flame after safety time (7 seconds) The heating flow temperature exceeds

C during operation

103 Problem with the electronic monitoring Problem with the electronic monitoring Problem with the electronic monitoring

Insufficient water pressure Domestic hot water temperature probe in open circuit Domestic hot water temperature probe short circuited Heating flow temperature probe in open circuit Heating flow temperature probe short circuited Heating return temperature probe in open circuit Heating return temperature probe short circuited Flame detected with gas valve closed Error in the electrical connection (live and neutral crossed) The air pressure switch is closed before the ignition sequence The air pressure switch does not close when the fan runs More than 5 RESETS of the boiler in 15

minutes.

The Control Panel has a 3 digit display, during normal operation the display will show one of three things on the

o right hand digits;

During Stand-by (no demand for Central Heating or D.H.W.) ‘on’ will be shown on the display and no LEDs will light.

During a demand for Domestic Hot Water, the temperature of the outgoing hot water is displayed in oC (e.g. 38) and the summer mode LED will light (F - FIG. 2.22).

During a demand for Central Heating, the temperature of the central heating flow will be displayed in oC (e.g. 65) and the central heating mode LED will light (H - FIG.2.22).

ing the oper

Dur display will show ‘

ation of the flue analysis mode* the sc’.

Should a fault occur the display will show the fault code and one of two letters, for a non-volatile shutdown the letter the f

will be sho

‘A’

ault eg.

‘

A02’

ed b

ollo

wn f

and the red

y the tw

LED (

o digit code f

G - FIG.

2.22)will

light, a non-volatile shutdown will require the reset button (D - FIG. 2.22) to be pushed before the boiler will attempt to relight, should the boiler lockout again, the assistance

ised Service Engineer should be sought.

of an A

uthor

Should the boiler develop a fault that cannot be corrected

y resetting the boiler

, the letter

followed by a two digit code (e.g.

olatile shutdo

wn code

, in the e the boiler will automatically resume oper cause behind it is resolv

ised Ser

of an A

uthor

ed. Should it not the assistance

vice Engineer would be required.

‘

E’ will be displa

E33) indicating a

ent of such a shutdown,

ation once the

A list of the fault codes can be found opposite.

2.12 REMOVING THE FRONT PANEL

In order to access the inside of the boiler, it is necessary to unscre located on the lower part of the panel itself. The control panel moves downward and when pulled forward rotates on two lateral hinges. The panel sta access to the inner parts of the boiler. To dismantle the front casing panel it is necessary to: 1 - Remove the two screws “B”; 2 - Move the front casing panel up and lift forward.

w the fastening screws

ys in a horizontal position, which allows

“A” of the control panel

2.13 ROOM THERMOSTAT CONNECTION

To connect a room thermostat, it is necessary to:

1. - Open the control panel as indicated in

2.- Remove the screws “A” from the terminal block on

the reverse of the control panel.

3. - Insert the thermostat cable through the cable grommet and fasten it by means of the cable-clamp provided.

4. - Connect the thermostat wires to the terminal block

(Diagram A).

5.- If a remote time clock is to be fitted, disconnect the integral time clock from the P.C.B.

6. - Using a volt-free switching time clock, connect the switching wires from the time clock following points 14 above

7. - If using an external time clock and room thermostat, these must be connected in series as points 1-7 above

Note: Only a low voltage room thermostat capable of

(Diagram B).

(Diagram C).

volt free switching must be used. Factory fitted integral wiring must not be disturbed when wiring external controls. Do not run low voltage cables alongside supply cables.

SECTION 2.12.

FIG. 2.22

2.14 ELECTRICAL/SYSTEM DIAGRAMS

USE

FUSE

1 2 4 5 63

N203 CN206

CN206 CN205CN203 CN201 CN303 CN302

N201

N300

CN302

CN303

CN304

N205

N200



A16

Y/G

Blk

Gry

Pnk

Gry or Bl

Blk

Brn

BlBlBl

Blk



ATTENTION

When replacing the P.C.B. disconnect the EEPROM key (leave it attached to the control panel) and reconnect to the new PCB.

FIG. 2.23

A - Dip Switch:

y set in position B)

actor

Do Not Use (jumper is f

1 2 - Anti-Cycling Device Adjustment for Heating

Position A = 0 mins Position B = 2 mins 3 - Do Not Use (jumper is factory set in position B) 4 - Do Not Use (jumper is factory set in position B) 5 - Fan over-run selector (after D.H.W. is drawn)

Position A = ON Position B = OFF 6 - Do Not Use (jumper is factory set in position B)

B - Summer/Winter Switch - Central Heating Temperature

Regulation C - Connector for Remote Control (Climate Manager) D - Domestic Hot Water Temperature Regulation E - Soft-light Regulation F - Maximum Central Heating Temperature Regulation G - ON/OFF Selector H - EEPROM I - Time Clock Connector L - Reset Push Button M - Economy/Comfort Selector N - EASY Teleservice (optional) P.C.B. Section O - Display P.C.B. Connector P - Transformer Q- Modem Connection (optional - EASY Teleservice)

A01 - Circulation Pump A02 - F A03 - Spark Generator Power Supply

A04 - Gas Valve Power Supply

alve

ised

Motor

A05 A07 - Flame Sensor A08 - Central Heating Flow NTC A09 A10 - Domestic Hot Water Flow Switch

Domestic Hot

ater NTC

A11 - Low Water Pressure Switch

Modulator

A12 A13 - Air Pressure Switch A14 - Overheat Thermostat

Timer/Room Thermostat

nal

Exter

A15 A16 - Central Heating Return NTC

COLOURS:

Gy - Grey Wh - White

Red

Rd Br - Brown Bl - Blue

Black

Blk Pk - Pink

2 3

4 5

6 7

AB C D E

12 13 14 15 16

2.15 WATER CIRCUIT DIAGRAM

FIG. 2.24

SI016C

LEGEND:

1. Fan

2. Heat Exchanger erheat Thermostat

al Heating Flo

Centr

5. Burner

Detection Electrode

Ignition Electrodes

alv

ter

Div

9. Low Water Pressure Switch

10. Drain Valve

11. Domestic Hot Water NTC

12. Secondary Heat Exchanger

13. Gas Valve

14. D.H.W. Flow Switch

15. D.H.W. Inlet Filter

16. Automatic By-pass

17. Safety Valve

18. Pressure Gauge

19. Circulation Pump with Automatic Air Release Valve

20. Central Heating Return NTC

21. Expansion Vessel

22. Air Pressure Switch

w NTC

Centr

Domestic Hot

B C. Gas Inlet

Domestic Cold Water Inlet

Centr

al Heating Flo

al Heating Retur

ater Outlet

3. COMMISSIONING

3.1 INITIAL PREPARATION

MTS (GB) Limited support the initiative. Within the information pack you will find a copy of the logbook. presence of your customer, they are shown how to use it, and it is signed b that they must have their logbook with them whenever they contact a service engineer or us.

Preliminary electrical system checks to ensure electrical

ety must be carried out by a competent person i.e.

saf polarity, earth continuity, resistance to earth and short circuit.

FILLING THE HEATING SYSTEM:

Lower the control panel and remove the case panels (see Open the central heating flow and return cocks supplied with the connection kit. Unscrew the cap on the automatic air release valve one full turn and leave open permanently. Close all air release valves on the central heating system. Gradually open valve(s) at the filling point (filling-loop) connection to the central heating system until water is heard to flow, do not open fully. Open each air release tap starting with the lowest point and close them only when clear water, free of air, is visible.

Purge the air from the pump by unscrewing the pump plug anticlockwise, also manually rotate the pump shaft in the direction indicated by the pump label to ensure the pump is free.

It is important that this is completed in the

y them. Please instruct your customer

SECTION 2.12 for further information).

the other appliances when they are in use at the same time.

Pipework must be of an adequate size. Pipes of less than 22mm should not be used.

Open the gas cock (supplied with the connection kit) to the appliance and check the gas connection on the appliance for leaks.

When the installation and filling are completed, flush the system while cold, refill, turn on the Central Heating system (SECTION 3.2) and run it until the temperature has reached the boiler operating temperature. The system must then be immediately flushed through. The flushing procedure must be in line with BS 7593:1992 code of practice for treatment of water in domestic hot water central heating systems. During this operation, we highly recommend the use of a central heating flushing detergent (Fernox Superfloc or equivalent), whose function is to dissolve any foreign matter that may be in the boiler and system following the flushing procedure.

Substances different from these could create serious problems to the pump or other components.

The use of an inhibitor in the system such as Fernox MB1 or equivalent is strongly recommended to prevent corrosion (sludge) damaging the boiler and system.

Failure to carry out this procedure may invalidate the appliance warranty.

Refit the pump plug. Continue filling the system until at least 1.5 bar registers on the pressure gauge.

ater soundness and remedy

Inspect the system f any leaks discovered.

FILLING

GAS SUPPLY:

OF THE

Close all hot water draw-off taps. Open the cold water inlet cock supplied with the connection kit. Open slowly each draw-off tap and close them only when clear water, free of bubbles, is visible.

Inspect the entire installation including the gas meter and test for soundness. The entire installation should be in accordance with the relevant standards. In GB this is BS 6891 and in IE this is the current edition of I.S.813.

The connection to the appliance is a 15mm copper tail located at the rear of the gas service cock (

If the gas supply serves other appliances, ensure that an adequate supply is available both to the boiler and

.H.W. S

or w

YSTEM:

FIG. 2.5).

3.2 INITIAL ST

ART

-UP

FIG. 2.27

FIG. 2.28

THE CHECKS TO BE RUN BEFORE INITIAL START-UP ARE AS

FOLLOWS:

Make sure that:

-the screw on the automatic air valve has been loosened when the system is full;

- If the water pressure in the system is below 1.5 bar, bring it up to the appropriate level;

-Ensure that the gas cock is closed;

-Make sure that the electrical connection has been made proper

ly and that the earth wire is connected to

an efficient earthing system;

- Supply power to the boiler by turning the On/Off knob “A” (see FIG. 2.27) - “on” will appear on the display. Turn the knob “C” to maximum and switch the time

clock to constant and turn up the room stat where fitted. After 7 seconds, the boiler will signal a shutdown due to ignition failure. Leave the boiler as it is until all of the air has been bled from the system.

-Loosen the cap on the head of the pump to eliminate any air pockets;

-Repeat the procedure for bleeding the radiators of air;

-Open the hot water taps for a brief period;

-Check the system pressure and, if it has dropped, open the filling loop again to bring the pressure back up to 1.5 bar.

2. Make sure that all radiator valves are open;

3. Turn on the gas cock and check the seals on the connections with an approved soap solution and eliminate any leaks.

4. Press the reset button

“D” (see FIG. 2.28) the boiler

will re-attempt ignition. If the burner does not light the first time, wait 1 minute and repeat the procedure.

5. Check the minimum and maximum burner pressure values; adjust if necessary using the values indicated in the tab

le in

SECTION 4 (

age 27)

3.3 OPERATIONAL ADJUSTMENTS

To access the areas in which adjustments are made, it is necessary to open the control panel, as indicated in SECTION 2.12, then remove the rear inspection cover by unscrewing the two screws “A”. Access is thereby provided to the P.C.B. and to the following components:

1. The power supply cable connector;

2. The fuses;

3. The soft-light potentiometer the setting for which can er to the

ange from the minim

um ther

mal po

maximum;

wer potentiometer

um po

y (anti-

utes

The maxim

adjustab

um ther

le b

mal heating po

y the minim

um to maxim

(already calibrated in the factory to 70% of the

um thermal power);

maxim The jumper f

cycling) f

or adjusting the ignition dela

, which can be set from 0 to 2 min

eature

(set in the factory at one minute);

un (Electrical Diagram). When the

an/Pump Ov

F jumper is set to position A the F activated. (The jumper is factory set in position B) The time clock connector (see pae 20).

er-r

an and Pump o

er-r

un is

3.4 COMBUSTION ANALYSIS

3.5 PR

ODUCT OF

COMB

USTION

DISCHARGE MONITORING

FU008A

The flue connector has two apertures, readings can be

en for the temperature of the combustion by-products

tak and of the combustion air, as well as of the concentrations of O2 and CO2, etc. To access these intakes it is necessary to unscrew the front screw and remove the metal plate with sealing

et.

gask It is possible to activate the flue test mode (maximum output) by pressing and holding the RESET button “D” for

10 seconds, will retur

ssc

“

” will be shown on the display. The boiler

n to normal operation after 5 minutes. The boiler can be returned to normal operation sooner by switching the boiler off and on again.

In the boiler, it is possible to monitor the correct operation of the flue exhaust/air intake, checking for a loss of general pressure in the system. Through the use of a differential manometer connected to the test points of the combustion chamber, it is possible to detect the ∆P of operation of the air pressure switch. The value detected should not be less than 0.90 mbar (31 kW) under conditions of maximum thermal power in order for the boiler to function properly and without interruption.

FU009A

3.6 BOILER SAFETY SYSTEMS

WARNING!

The boiler is still powered.

The boiler is protected from malfunctioning by means of internal checks by the P.C.B., which brings the boiler to a stop if necessary.

There are two types of shut-off:

SHUTDOWN (A)

•

• SAFETY SHUTDOWN (E)

SHUTDOWN“

”

This type of appliance shutdown is called “volatile”, and is indicated on the display by a number preceded by the letter (A), and by the symbol GFIG. 2.22 Page 18), as illustrated in the table below:

Important

If this shutdown occurs frequently, contact an authorised Service Centre for assistance. For safety reasons, the boiler will allow a

maximum of 5 reset

operations to take place in 15 minutes (pressing the

RESET button). If the shutdown is occasional or an isolated ev not necessarily a problem.

ent, this is

DISPLAY CAUSE

AA001

AA003

AA997

AA998

AA999

No flame after saf

The heating flow temperature exceeds 103oC during operation

lem with the electronic monitor

Prob

lem with the electronic monitor

Prob Problem with the electronic monitoring

ety time (7 seconds)

ing ing

SAFETY SHUTDOWN “E”

In the event of a safety cut-off (displayed with the code shown in the table), the boiler will automatically try to reset itself and relight. Should this not be the case, contact an

ised Service Centre for assistance.

author

DISPLAY CAUSE

EE002 EE004

EE005

EE006

EE007

EE008

EE009

EE220

EE221

EE333

EE334

EE999

Insufficient water pressure Domestic hot w

ater temperature probe in open circuit Domestic hot water temperature probe short circuited Heating flow temperature probe in open circuit Heating flow temperature probe short circuited Heating return temperature probe in open circuit Heating retur

n temperature probe short circuited Flame detected with gas valve closed Error in the electrical connection (live and

al crossed)

neutr The air pressure switch is closed before the ignition sequence The air pressure switch does not close when the fan runs More than 5 RESETS of the boiler in 15

minutes.

ANTI-FROST DEVICE:

The boiler is fitted with a device which, in the event that the water temperature falls below 3

wer until the boiler reaches a temperature

the minim

um po

˚C, the burner ignites at

of approximately 33˚C in the heating circuit. This device only operates if the boiler is functioning perfectly and:

- the system pressure is sufficient;

- the boiler is powered electrically;

- the gas is turned on.

PUMP /DIVERTER VALVE PROTECTION:

To prevent the pump and diverter valve from siezing the

y 21 hours

boiler will activ

ate the pump f

or 20 seconds e

after it’s last operation and activate the diverter valve.

3.7 DRAINING THE SYSTEM

3.10 INSTRUCTING THE END USER

DRAINING

The heating system must be drained as follows:

- Turn off the boiler;

- Attach a hose pipe and open the drain valve;

- Drain the system at the lowest points (where present). When the heating system is unused for an extended period of time, it is recommended that you add antifreeze with an ethylene glycol base to the water in the heating pipe work and radiators if the ambient temperature drops below 0°C during the winter. This makes repeated draining of the entire system unnecessary.

DRAINING THE DOMESTIC HOT WATER SYSTEM

Whenever there is the danger of the temperature dropping below the freezing point, the domestic hot water system must be drained as follows:

- Turn off the general water valve for the household plumbing system;

- Turn on all the hot water taps;

- Empty the remaining water from the lowest points in the system (where present).

THE

HEA

TING

SYSTEM

3.8 COMPLETION

1. Hand over the copy of the End User Instructions supplied with the appliance, together with these instructions, and e

xplain how to use the timeclock and room thermostat.

2. Show the End User how to switch the appliance off quickly, and indicate the position of the electric supply isolator.

3. Inform the End User of the location of all drains, isolating valves and air vents.

4. Explain how to turn the appliance off for both short and long periods and advise on the precautions necessary to prevent damage in the event that the appliance is inoperative when freezing conditions occur.

5. Instruct the End User on the correct procedure for checking and refilling the boiler.

6. Finally advise the End User that, for continued safe and efficient operation, the appliance must be serviced by a competent person at least once a year.

For the Republic of Ireland it is necessary to complete a “Declaration of Conformity” to indicate compliance to I.S.

813. An example of this is given in the current edtion of I.S.

813. In addition it is necessary to complete the Log Book.

3.9 OPERATIONAL CHECKS

1. The flue system must be visibly checked for soundness.

2. On Central Heating allow the system to warm up and adjust the Central Heating temperature control knob, check the burner modulates up and down between the high and low settings.

3. Range rate the thermal power for Central Heating, as detailed in

4. Run the Domestic Hot Water and adjust to the correct water flow rate, adjust the Domestic Hot Water temper up and down between the high and low settings.

5. Balance the Central Heating system until all return temperatures are correct and equal.

SECTION 4.2, Page 29.

ature control knob to check the burner modulates

6. Turn the ON/OFF button OFF, disconnect the pressure Gauge, retighten screw and relight boiler.

7. Re-examine Central Heating, Domestic Hot Water and Cold Water supplies for soundness.

8. Check the appearance of the gas flame to assess the adequacy of the combustion air supply.

9. If external controls have been disconnected, reconnect

and test.

10. Refit boiler casing.

4. GAS ADJUSTMENTS

TABLE A

TEGORY II2H3+

Lower Wobbe Index (15°C;1013mbar) MJ/m3h Nominal Delivery Pressure mbar

microGenus II 24 MFFI

Main Burner: n. 14 jets (ø) mm Consumption (15°C; 1013mbar) max - min m3/h Consumption (15°C; 1013mbar) max - min Kg/h Gas Burner Pressure max - min mbar

oGenus II 28 MFFI

micr

Main Burner: n. 14 jets (ø) mm Consumption (15 Consumption (15°C; 1013mbar) max - min Kg/h Gas Burner Pressure max - min mbar

microGenus II 31 MFFI

Main Burner: n. 14 jets (ø) mm Consumption (15°C; 1013mbar) max - min m Consumption (15°C; 1013mbar) max - min Kg/h Gas Burner Pressure max - min mbar

°C; 1013mbar) max - min m

Methane Gas

G20

45.67 20

1.25

2.80 - 1.16

---

10.3 - 2.0

1.30

3.15 - 1.27

---

10.8 - 2.0

1.35

3.54 - 1.48

---

11.5 - 2.1

Liquid Butane Gas

G30

80.58 29

0.72

---

2.09 - 0.87

28.1 - 5.0

0.77

---

2.35 - 0.95

28.0 - 5.0

0.80

---

2.64 - 1.10

26.8 - 5.3

Liquid Pr

2.06 - 0.85

35.6 - 6.8

2.31 - 0.93

36.0 - 6.0

2.60 - 1.09

34 - 6.5

opane Gas

G31

80.58 37

0.72

---

0.77

---

0.80

---

4.1 CHANGING THE TYPE OF GAS

The boiler can be converted to use either methane (natural) gas (G20) or L.P.G. (G30 - G31) by an Authorised Service Centre.

The operations that must be performed are the following:

1. Replace the jets on the main burner

(see table in section 4);

2. Adjust the maximum and minimum thermal capacity values for the boiler

(see table in section 4 and 4.2 Adjusting the Gas Pressures);

3. Adjust the maximum thermal power setting (see tables in section 4.3 and FIG. 4.1);

4. Adjust the soft-light feature

(see table below for recommended pressure and Fig. 4.1);

5. Adjust the ignition delay feature for the heating system by adjusting the Jumper as indicated in Section 2.14

(FIG. 2.23). It can be set from 0 to 2 mins.).

RECOMMENDED SOFT LIGHT PRESSURES

4.2 ADJUSTING THE GAS PRESSURES

Setting the minimum and the maximum power of the boiler

Check that the supply pressure and dynamic working pressure to the gas valve is a minimum of 20 mbar for natural gas.

o do this, loosen the screw

2. T

“A”.

Fit the pipe of the pressure gauge to the inlet pressure connection of the gas valve “B” and check for the correct standing pressure, then operate the appliance and check for the correct working pressure. When y

ou have completed this operation, replace the

screw “A” securely into its housing to seal off the gas (check for tightness).

3. To check the pressure supplied by the gas valve to the

burner, loosen the screw

“C”. Fit the pipe of the

pressure gauge to the pressure outlet test point of the gas valve

“D”.

Disconnect the compensation pipe “D1” either from the gas valve or from the sealed chamber.

4. Turn the On/Off knob to “ON” position -green light- and

ensure that the hot water temperature control knob is set to maximum. Turn on the boiler by running a hot water tap. Adjust the 10mm nut “E” on the modureg to set the maximum gas pressure, turn the nut clockwise to increase and anti clockwise to decrease the pressure until the required pressure is achieved (see TABLE A Page 27).

5. To set the minimum power, disconnect a supply terminal “F1” from the modureg and adjust screw “F” (ensure that the 10mm nut is held in position). Turn the screw clockwise to increase the pressure and anticlockwise to decrease the pressure (displayed on the pressure gauge) corresponding to the minimum power (see TABLE A Page 27).

e completed the above operations, turn

6. When you ha

v off the hot water tap, reconnect the supply terminal to the modureg on the gas valve, reconnect the compensation pipe and replace the cap on the scre of the modureg.

1 2 4 5 63

N203 CN206

N201

N200



Soft-light

Adjustment

ax Heating

Power

IMPORTANT!

Whenever you disassemble and reassemble the gas connections, always check for leaks using a leak detection fluid.

Setting the maximum heating circuit power

o set the maximum heating circuit power, turn the

7. T

On/Off knob to the “ON” position and set the time clock and an

y external controls to the “ON” position. Turn the

knob of the heating thermostat clockwise to maximum.

8. Remove the inspection panel of the P.C.B. and fit a

small cross-head screwdriver in to the right hand potentiometer (see belo the pressure or anti-cloc

w). Turn clockwise to increase

kwise to reduce the pressure. Adjust the setting to the required heating pressure value (displayed on the pressure gauge), as indicated in the charts shown on Page 31.

9. Turn off the boiler by placing the main switch to the

"OFF" position.

Setting the pressure for soft-light ignition.

Disconnect the detection electrode connection close to the P.C.B. (SECTION 6.3.3). Start the boiler and during the ignition sequence adjust the left hand potentiometer until the gas pressure reads the required gas pressure (see the table on page 27). Once the gas pressure is set turn off the boiler and reconnect the detection electrode to the P.C.B. NB.: It may be necessary to reset the flame failure reset a number of times during this operation.

10. Remove the pipe from the test point and tighten the

screw “

C” to the pressure test point in order to seal off

the gas.

11. Carefully check the pressure test points for gas leaks

(both inlet and outlet).

microGENUS II 24 MFFI

NATURAL GAS (G20)

kW 10 12 14 16 18 20 22 24

mbar 2.5 3 3.75 4.75 5.75 7 8 10

LIQUID GAS (G30)

kW 10 12 14 16 18 20 22 24

mbar 5.5 8 10 12.5 15.5 18.5 22 26

LIQUID GAS (G31)

kW 10 12 14 16 18 20 22 24

mbar 7 9 12 15.5 19 24 28 34

microGENUS II 28 MFFI

NATURAL GAS (G20)

kW 11 13 15 17 19 21 23 25 27

mbar 2 2.75 3.5 4.5 5 6 7 8.5 10

LIQUID GAS (G30)

kW 11 13 15 17 19 21 23 25 27

mbar 5 6.5 8.5 10.5 13 15.5 18.5 21 25

LIQUID GAS (G31)

kW 11 13 15 17 19 21 23 25 27

mbar 6.5 8 10 12 14.5 17.5 21 25.5 31

microGENUS II 31 MFFI

NATURAL GAS (G20)

kW 13 15 17 19 21 23 25 27 29 31

mbar 2.5 3 3.5 4.5 5.5 6.5 7.5 8.5 10 11.5

LIQUID GAS (G30)

kW 13 15 17 19 21 23 25 27 29 31

mbar 5 7 8 10 12 14 17 20 23 27

LIQUID GAS (G31)

kW 13 15 17 19 21 23 25 27 29 31

mbar 7 9 11 13 15 18 21 24 28 34

NOTE: THIS TABLE CAN BE USED IN CONJUNCTION WITH THE GRAPH ON PAGE31.

FIG. 4.1

3434

3636

3838

4040

modello 24

modello 28 modello 31

modello 24

modello 28 modello 31

modello 24

modello 28 modello 31

Regulating the heating po

natural gas (G20)

Regulating the heating po

butane gas (G30)

wer for

model 24 model 28 model 31

Burner pressure

wer for

model 24

model 28

model 31

Regulating the heating power for

propane gas (G31)

Burner pressure

model 24

model 28

model 31

Burner pressure

5. MAINTENANCE

It is recommended that the following inspections be carried out on the boiler at least once a y

1 - Check the seals for the water connections; replace

any faulty seals. 2 - Check the gas seals; replace any faulty gas seals. 3 - Visual check of the entire unit.

Visual check of the combustion process or analysis

4 -

of combustion by-products (see

cleaning of the burner if needed. 5 - If necessary, dismantling and cleaning of the

combustion chamber. 6 - If necessary, dismantling and cleaning of the burner

jets. 7 - Visual check of the primary heat exchanger:

- check for overheating in the blade assembly;

- clean the exhaust fan if needed.

8 - Adjustment of the gas pressure, gas rate and soft-

light, partial load and full load. 9 - Check of the heating safety systems:

- safety device for maximum temperature (overheat thermostat);

- safety device for maximum pressure (safety valve).

10- Check of the gas safety systems:

- safety device for lack of gas or flame ionisation (detection electrode).

Check of the electrical connection (ensure it

11-

complies with the instructions in the manual).

12- Check of Domestic Hot Water production efficiency

(flow rate and temperature)

13- General check of the combustion by-products of the

discharge/ventilation system.

14- Check of the general performance of the unit.

SECTION 3.4) and

ear:

NOTE: THESE CHECKS ARE NOT EXHAUSTIVE

6. SERVICING INSTRUCTIONS

To ensure efficient safe operation, it is recommended that the boiler is ser

Before starting any servicing work, ensure both the gas and electrical supplies to the boiler are isolated and the boiler is cool.

Before and after servicing, a combustion analysis should be made via the flue sampling point (please refer to SECTION 3.4 for further details).

After servicing, preliminary electrical system checks must be carried out to ensure electrical safety (i.e. polarity, earth continuity, resistance to earth and short circuit).

6.1 REPLA

The life of individual components vary and they will need servicing or replacing as and when faults develop. The fault finding sequence chart in which component is the cause of any malfunction, and instructions for removal, inspection and replacement of the individual parts are given in the following pages.

6.2 TO GAIN GENERAL ACCESS

viced annually by a competent person.

CEMENT OF

PAR

SECTION 7 will help to locate

2. The control rotates on two lateral hinges; the panel stays in a

horizontal position, which allows access to the inner parts of the boiler (F

3. Remove the screws “B” from the front panel bottom lip

IG. 6.3);

4. Lift the front panel up and forward from the raised screws at the

the top of the casing (F

FIG. 6.3

IG. 6.2);

IG. 6.4).

All testing and maintenance operations on the boiler require the control panel to be lowered. This will also require the removal of the casing.

6.2.1 Removing the front panel

1. Loosen the fastening screws “A” of the control panel located

on the lower part of the panel itself. (F

FIG. 6.1

IG. 6.1);

FIG. 6.2

FIG. 6.4

6.2.2 Removing the sealed chamber front cover

6.2.3 Removing the side panels

1. Remo

ve the screws “C” (F

IG.

6.5);

2. Lift the sealed chamber front cover from the locating pins

IG. 6.6).

1. Remo

ve the four screws “D” for each side panel (F

IG.6.7

);

2. Pull the panel away from the boiler at the base, then lift the

panel up and remove from the boiler (F

6.7

FIG.

IG.6.8).

FIG. 6.5

FIG. 6.8

FIG.

6.6

6.3 ACCESS TO THE COMBUSTION CHAMBER

6.3.1 Removing the combustion cover

1. Remo

ve the screws “E” (F

2. Lift off the comb

FIG. 6.9

ustion cover.

IG.

6.9);

6.11

Fig.

6.3.3 Removing the electrodes

Before carrying out this procedure, unscrew and slide the burner forward (see previous section).

1. Remove rubber gasket “G” (FIG. 6.12);

2. To remove the detection electrode disconnect the cable at

its connection point close to the P.C.B. (FIG. 6.13);

3. Remove screw “H” (FIG. 6.14);

4. Gently slide the electrode downward (FIG. 6.15).

6.3.2 Removing the burner and jets

1. Remove the screws “F” from the burner (FIG. 6.10);

2. Remove the burner (FIG. 6.11);

3. Disconnect the electrodes (see SECTION 6.3.3);

4. Remo

e the jets using a No

. 7 socket spanner;

5. Replace in reverse order.

FIG. 6.10

FIG. 6.12

FIG. 6.13

6.3.4 Removing the main heat exchanger

FIG.

6.14

1. Drain the boiler of water;

2. Remove the side panels (see 6.2.3)

3. Remo

4. Remo

5. Release the connection nut “K” (FIG. 6.17);

6. Release the connection nut “L” (FIG. 6.18);

ve the overheat thermostat sensor “I” (F ve the clips “J” (F

IG.

6.16);

IG.

6.16);

7. Pull down the pipe (FIG. 6.19);

4. Pull the exchanger out (FIG. 6.20).

Fig. 6.16

FIG. 6.15

ying

o replace

, repeat the steps in re

erse order

, pa

particular attention to the following:

Centre the electrode in the positioning hole carefully

a -

otherwise the electrode ma

y break;

b -Ensure that the left hand and right hand electrodes are

located the correct w

e the correct spar

giv

ay round (facing each other), to

k gap;

c -Check that the cables have been connected correctly; d -Check that the rubber gasket seals the cable/

electrode connection point completely.

6.17

FIG.

FIG. 6.18

6.3.5 Removing the air pressure switch

1. Disconnect the electrical connections “M” and silicone

pipes “N” from their connection points (F

IG. 6.21);

2. Remove screws “O” on the top of the sealed chamber

(FIG. 6.22);

3. Lift out the air pressure switch (FIG. 6.23);

4. Unscrew to remove the switch from the plate.

FIG. 6.21

6.19

Fig.

Fig. 6.20

FIG. 6.22

FIG. 6.23

6.3.6 Removing the fan

6.4 ACCESS TO THE GAS VALVE

1. Disconnect electrical connections “P” and silicone pipe

“Q” (FIG.6.24);

2. Remove screw “R” and remove the fan collar clamp “R”

(

FIG.6.25

3. Remove screws “S” (FIG.6.26);

4. Remove fan and mounting plate (FIG.6.27).

);

FIG. 6.24

6.4.1. Removing the spark generator (HONEYWELL Gas Valve)

1. Disconnect ignition leads

“T” by pulling upward

(FIG. 6.28);

2. Remove the screw “U” (FIG. 6.29);

3. Remove the spark generator by pulling forward from

the gas v

alve (F

IG.

6.30).

FIG. 6.28

FIG. 6.25

FIG. 6.29

FIG. 6.26

FIG. 6.27

FIG. 6.30

6.4.2 Removing the gas valve (Honeywell)

6.5 ACCESS TO THE WATER CIRCUIT

Important! Before removing the gas valve, ensure the gas supply is tur

ned off.

1. Disconnect all the cables from the solenoid and

modureg;

2. Remo

3. Release the n

ve the spark generator (see previous section);

uts “V” (F

IG.

6.31);

4. Remove the screws “W” from the bottom of the gas

valve (FIG. 6.32);

5. Remove the gas valve (FIG. 6.33).

Important! Before any component is removed, the boiler must be drained of all water.

Removing the D.H.W. (secondary) exchanger

6.5.1

Remove the screws “X” (FIG 6.34);

2.Disconnect the cable “Y” (FIG 6.35);

3.Push the insulation of the exchanger towards the rear

of the boiler, and lift upwards and remove from the front of the boiler (FIG 6.36);

4.Push the exchanger towards the rear of the boiler, and

lift upwards and remove out of the front of the boiler (FIG 6.37);

5.Before replacing the exchanger ensure that the O-rings

are in good condition and replace if necessary.

FIG. 6.31

FIG. 6.32

FIG. 6.34

6.35

FIG.

6.33

FIG. 6.36

6.5.2 Removing the pump pressure switch

1.Remove the pump pressure switch electrical connections

“Z”

2.Unscrew the pump pressure switch by

IG 6.38

);

using

a spanner on

the nut (FIG 6.39);

3.Remove the pump pressure switch (FIG 6.40).

FIG. 6.37

FIG. 6.38

FIG. 6.39

FIG. 6.40

6.5.3 Removing the safety valve

1. Disconnect the discharge pipe work from below the

;

boiler

2. Unscrew the fixing screw “A1” (FIG. 6.42)

3. Pull the valve upwards for removal (FIG. 6.43).

FIG. 6.41

6.5.4 Removing the automatic air vent

1. Remo

ve the U-clip “B1” (F

IG.

6.44);

2. Remove valve complete with float using a screwdriver

(

IG 6.45-FIG 6.46

FIG. 6.44

FIG. 6.42

6.43

FIG.

FIG. 6.45

FIG. 6.46

6.5.5 Removing the pump

1. Remove the electrical connection “ C1” (FIG. 6.47);

2. Release the n

ut “D1” (F

IG.

6.48);

3. Remove the retaining clip “E1” from the bottom of the

boiler (FIG. 6.49);

4. Remove the screw “F1” (FIG. 6.50);

5. Remo

ve the U-clip “G1” and remove the pressure

gauge connection (

6.51);

IG.

6. Remove the U-clip “H1” and remove the automatic air

vent (FIG. 6.52);

7. Remove the pump.

FIG.

6.50

FIG. 6.47

6.48

FIG.

FIG. 6.51

FIG. 6.52

FIG.

6.49

6.5.6 Removing the pressure gauge

6.5.7 Removing the expansion vessel

1. Remove the U-clip “I1” (FIG. 6.53)

2. Lift the pressure gauge from the rear of the control

panel using a screwdriver (FIG. 6.54-6.55).

FIG. 6.53

1. Release nut “J1” (FIG. 6.56);

2. Remo

ve back-nut “K1” (F

IG.

6.57);

3. Remove the expansion vessel (FIG. 6.58).

FIG. 6.56

FIG. 6.54

FIG. 6.55

FIG. 6.57

6.58

FIG.

6.5.8 Removing the overheat thermostat

6.5.9 Removing the C.H. temperature probe (N.T.C.)

1. Disconnect the overheat thermostat electrical

connections

“L1” (F

IG.

6.59);

2. Then remove the thermostat from its mounting by

releasing the securing clip (FIG. 6.60-6.61).

FIG. 6.59

1. Pull off the electrical connector and remove the sensor

.(F

probe

6.62-6.63).

IG.

FIG. 6.62

FIG. 6.60

6.61

FIG.

FIG. 6.63

6.5.10 Removing the D.H.W. temperature sensor .C.)

(N.T

1. Pull off the electr

ical connector and unscrew the

sensor probe using a suitable spanner (FIG. 6.64).

FIG. 6.64

6.5.11 Removing the diverter valve actuator

6.5.12 Removing the D.H.W. flow switch

1. Unplug the electrical connector “O1” (FIG. 6.66);

2. Remo

ve the D.H.W. flow switch using a screwdriver

(FIG. 6.67-6.68).

FIG. 6.66

1. Unplug the electrical connector “M1” (FIG. 6.65);

2. Release the retaining clip “N1” and remove the divertor

valve actuator

FIG. 6.65

FIG. 6.67

FIG.

6.68

6.6 ACCESS TO THE CONTROL SYSTEM

6.6.1 Checking the fuses

Important! Isolate the electrical supply to the boiler

ore accessing the control panel.

bef

1. Remove the inspection cover on the reverse of the

control panel and unscre

w the screws “P1”(F

IG.

6.69);

2. Remove the fuses (FIG. 6.70).

FIG. 6.69

FIG. 6.70

6.6.2 Removing the P.C.B.

1. Isolate electricity;

2. Remo

ve the inspection cover from the reverse of the

control panel, unscrew the screws “Q1” (FIG. 6.71);

3. Unplug all electrical connections from the P.C.B (FIG.

6.72);

4. Carefully unplug the EEPR

5. Remo

ve the screws “S1” (F

OM key “R1” (F

6.74);

IG.

6.73);

6. Separate the facia panel from the rear of the control

panel ;

7. Remove the main P.C.B., unscrew the screws “T1”

(FIG. 6.75);

8. Unscew the display P.C.B. mounting screws “T2” and

disconnect the P.C.B. connection cable “T3” (FIG. 6.76);

9. Remove the display P.C.B. (FIG. 6.77);

10.Replace either P.C.B. in reverse order.

11.Refit the EEPROM key “R1”

FIG. 6.74

FIG. 6.71

FIG. 6.75

6.76

FIG.

6.72

6.73

FIG.

6.77

6.6.3 Removing the time clock

1. Disconnect the electrical connections “U1” from the

cloc

k (F

IG.

6.78);

2. Remove screws “V1” (FIG. 6.78);

3. Lift the time clock out from the control panel (FIG. 6.79).

FIG. 6.78

FIG. 6.79

7. FAULT FINDING

PRELIMINARY CHECKS

MAKE SURE THAT:

IS

THE POWER

DISPLAY

ON?

POSTION

OF THE

SELECTOR

NONO

CENTRALCENTRAL

HEAHEATINGTING

ESTAT E

HOT WATER

ONLY

NONO

YESYES

NONO

YESYES

TURN ON THE ON/OFF

SWITCH

IS D.H.W.

BEING DRAWN?

IS D.H.W.

BEING DRAWN?

FOR BOILERS

WITH ELECTRONIC

ANTI-FROST DEVICE:

PROTECTION IS ACTIVATED

IF HEATING TEMP

IS < 5

FOR BOILERS

WITH ELECTRONIC

ANTI-FROST DEVICE:

PROTECTION IS ACTIVATED

IF HEATING TEMP

IS < 5

MUST

TIME CLOCK

AND/OR ROOM

THERMOSTAT

BE ACTIVATED?

ECONOMY/

COMFORT

SELECTOR

TEMP.

C.H. < 42°C

Comfort

Economy

- There is sufficient water in 

the system

- The gas is turned on 

- The electrical supply is

turned on

1 - Check/reset system pressure 2 - Check/restore gas supply 3 - Check/replace short- circuited heating probe 4 - Check/replace siezed pump

1 - Check/reset the system pressure 2 - Check/restore gas supply 3 - Check/replace short- circuited heating probe 4 - Check/replace siezed pump

TEMP.

C.H. < 42°C

ECONOMY/

COMFORT

SELECTOR

YESYES

OES AN ERROR CODE

APPEAR ON THE DISPLAY?

. Check the fuses

2. Check the power supply to the control panel 3

. Check/replace the ON/OFF button 4

. Check the connection between

the main and display P.C.B.s

see section 3.6

5. Check/replace the

main and display P.C.B.s

7.1 FA

o ensure that the external controls do

T not interfere with the fault finding, disconnect the wires from the terminal block on the rear of the control panel and provide a solid link between the terminals.

ULT

FINDING GUIDE

(FLOW-CHARTS)

These fault finding guides are not exhaustive. However, it is possible to detect and correct many defects by using the standard fault finding diagrams described in this chapter, ensure these guides are carried out in the set order.

YESYES

NONO

IS THE

UMP RUNNING?

1. Check if there is air in the system

2. Check the main circuit flow switch operation

3. Check the pressure on the water gauge and fill system to 1 bar

1. Check pump cable

2. Check/replace main P.C.B.

Release/replace

pump

Turn the

ON/OFF Control Knob

POWER TO

THE PUMP?

YESYES

THE LOW WATER

PRESSURE SWITCH

WORKING CORRECTLY?

E02: does not reset

ONO

NONO



1. Check the fan cable

2. Replace the fan

3. Replace the main P.C.B.

1. Check/replace ignition electrode

2. Check ignition cable

3. Check/replace the main P.C.B.

Replace

the main P.C.B.

IS THE FAN

RUNNING?

DOES CODE

33 APPEAR?

IGNITION

SPARKS ARE GENERATED

REGULARLY?

YESYES

NONO

YESYES

NONO

1. Check the power supply of the gas valve.

2. Check for an air pressure signal

3. Check the gas pressure on the burner

4. Check the soft-light adjustment

5. Replace the gas valve

6. Check/replace the main P.C.B.

1. See section 3.6

2. Press RESET

1. See section 3.6

IS THE BURNER

ALIGHT?

BOILER HAS SHUTDOWN?

YESYES

NONO

THERE STILL

A PROBLEM?

NORMAL

OPERATION

NONO

YESYES

8. EXPLODED VIEW

104

101

103

102

109

112

111 110

114

115

113

301 302 303

304

305

8 9

73 74

2219 20

142321

25 28 30 30 3126

5359 555758

105

106

100

107

108

998616 998077 997147 573520

65100547

569390 995903

998458 65101427 65101257 65101426 65101417

999599 65100695 65100716

998484

573521 61011136 61010017

990686

996065

997077

997088

573528 65100249 65100244 65101368 65100709 65100871 65100693 65100694 65100692

999397 65100719 65101428 65100540

Key

no.

ARISTON

Part No.

Description

9 13 17 18 20 21 22 23

37 40 50

63 68

69 70 74 75 76 78 80 94 95 97

101 102 103 109

551

Expansion vessel O-ring Motor (3- Way valve) Gasket 3/4" Flow group Gasket 1/4" Low water pressure switch Temperature probe (D.H.W.) Return group (24 MFFI) Return group (28/31 MFFI) Pump (24 MFFI) Pump (28/31 MFFI) Clock Pressure gauge Air pressure switch (28/31 MFFI) Air pressure switch (24 MFFI) Gasket (3/8") Heat exchanger (28/31 MFFI) Heat exchanger (24 MFFI) Temperature probe & clip (C.H.) Thermostat (overheat) Fixing clip (motor) Safety valve (3 bar) Gasket (1/2") Spark generator Gas valve EEPROM key CMP3 (microGENUS II) P.C.B. (display) P.C.B. (main) Electrode (ignition R.H.) Electrode (ignition L.H.) Electrode (detection) Fan (24 MFFI) Fan (31 MFFI) Fan (28 MFFI) Flow detection kit (w/magnet)

1 1 1 1

1 1 1 1 1 1 1 1 1 1 1 1 1

1 1

1 1 1 1

1 1 1 1 1 1 1 1 1 1 1 1

(Not Illustrated)

8.1 SHORTSP

ARES

LIST

9. TECHNICAL INFORMATION

Name CE Certification Flue

General Info

Energy Performance

Emissions

Central Heating

Type

Heat Input max/min kW Heat Output max/min kW Efficiency of Nominal Heat Input % Efficiency at 30% of Nominal Heat Input Efficiency at Minum Input %

UK Rating Band

SEDB Heat Loss to the Casing (∆T=50°C) % Flue Heat Loss with Burner Operating % Flue Heat Loss with Burner Off %

Max Discharge of Products of Combustion (G20) Kg/h Residual Discharge Head mbar

emp. of exhaust fumes at nominal capacity °C

2 Content %

CO O2 Content % CO Content ppm Nox Class Minimum Ambient Temperature °C

Head Loss on Water Side (max) (T=20°C) mbar Residual Head of System bar Expansion Vessel Pre-load Pressure bar Maximum Heating Pressure bar Expansion Vessel Capacity l Maximum Water Content of System l Heating Temperature max/min °C

microGenus II 24 MFFI

0694BO4008

C12-C32-C42-C52-C82-B22-B32

29.4 / 12.2

24.8 / 9.7

84.3

81.6

79.6 D

1.2

5.1

0.4

51.4

1.23

106.9

7.15

7.9

39.3 3

200

0.25

0.7 3 7

130

82 / 42

microGenus II 28 MFFI

0051BO2494

C12-C32-C42-C52-C82-B22-B32

33.1 / 13.3 28 / 10.5

84.5

80.5

78.7 D

1.1

5.7

0.4

61.9

0.65

115.4

6.67

8.4

36.8

200

0.25

0.7 3 7

130

82 / 42

Domestic Hot Water Temperature (approx) max/min °C Specific Flow Rate (10 minutes/DT 30°C) l/min D.H.W. Flow Rate ∆T=25°C l/min D.H.W. Flow Rate ∆T=35°C l/min

Minimum Flow Rate l/min

.H.W

ater max/min

Pressure of Domestic Hot

Domestic Hot Water

Nominal Pressure Natural Gas (G20) mbar

LPG (G30-G31)

Consumption at Nominal Capacity(G20) m3/h

Gas

(15°C, 1013 mbar) (G30-G31) Kg/h Gas Consumption after 10 Minutes* m

Electrical Supply (V ± 5%) V/Hz Power Consumption W Protection Grade of Electrical System Internal Fuse Rating

Electrical Data

Dry Weight Kg Dimensions (W/D/H) mm Maximum Flue Length (Horizontal) m Maximum Flue Length (Vertical) m

bar

mbar

56 / 36

11.8

14.2

10.2

2.5

6 / 0.2

28/30 - 37

2.80

2.09 - 2.06

0.33

230/50

125

X4D

2A FAST

700x400x315

4 5

56 / 36

13.3

15.9

11.4

2.5

6 / 0.2

28/30 - 37

3.15

2.35 - 2.31

0.37

230/50

140

X4D

2A FAST

700x400x315

4 5

G.C. Number

*Calculated at 70% maximum output

47-116-25

47-116-26

Name CE Certification Flue

General InfoEnergy Performance

Type

microGenus II 31 MFFI

0694BO4008

12-C32-C42-C52-C82-B22-B32

Heat Input max/min kW Heat Output max/min kW Efficiency of Nominal Heat Input Efficiency at 30% of Nominal Heat Input % Efficiency at Min

um Input % SEDBUK Rating Band Heat Loss to the Casing (T=50°C) % Flue Heat Loss with Burner Operating % Flue Heat Loss with Burner Off %

Max Discharge of Products of Combustion (G20) Kg/h Residual Discharge Head mbar

emp. of exhaust fumes at nominal capacity °C

2 Content %

CO O2 Content CO Content ppm

Emissions

Nox Class Minimum Ambient Temperature °C

Central Heating

Heating Temperature max/min °C

37.2 / 15.5

31.1 / 12.1

83.6 81

78.1

1.5

5.7

0.4

64.7

1.6

121.2

7.19

7.8

60.5

200

0.25

0.7 3 7

130

82 / 42

Domestic Hot Water Temperature (approx) max/min °C Specific Flow Rate (10 minutes/DT 30°C) l/min D.H.W. Flow Rate ∆T=25°C l/min

Flow Rate ∆T=35°C l/min

.H.W

.H.W. Minimum Flow Rate l/min

D Pressure of Domestic Hot Water max/min bar

Domestic Hot Water

Nominal Pressure

Natural Gas (G20) mbar LPG (G30-G31) mbar

Consumption at Nominal Capacity(G20) m

Gas

(15°C, 1013 mbar) (G30-G31) Kg/h Gas Consumption after 10 Minutes* m

Electrical Supply (V ± 5%) V/Hz Power Consumption W Protection Grade of Electrical System IP Internal Fuse Rating

Elettrical Data

Dry Weight Kg Dimensions (W/D/H) mm Maximum Flue Length (Horizontal) m Maximum Flue Length (Vertical) m

56 / 36

14.8

17.8

12.7

2.5

6 / 0.2

28/30 - 37

3.54

2.64 - 2.60

0.41

230/50

165

X4D

2A FAST

700x400x315

4 5

G.C. Number

*Calculated at 70% maximum output

47-116-27

Manufacturer: Merloni TermoSanitari SpA - Italy

Commercial subsidiaries: MTS (GB) Limited

MTS Building Hughenden Avenue Damastown Avenue High Wycombe Mulhuddart Bucks HP13 5FT

Telephone: (01494) 755600 Telephone: (01) 810 3723 Fax: (01494) 459775 Fax: (01) 810 3727 Internet: www.mtsgroup.com/uk Internet: www.mtsgroup.com/ie E-mail: info@uk.mtsg

Technical Advice: 0870 241 8180 Technical Advice: (01) 437 0121 Customer Service: 0870 600 9888 Customer Service: (01) 437 0121

MTS Heating Limited

Damasto

Dub

roup.com E-mail: info@ie.mtsgroup.com

wn Industr

lin 15

ial P

0 99 84 1854 211 Edition 2 04/04

Ariston microGENUS II 24 MFFI, microGENUS II 28 MFFI, microGENUS II 31 MFFI User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

TABLE OF CONTENTS

1. GENERAL INFORMATION

1.1 GENERAL INSTRUCTIONS

1.2 OVERALL VIEW

2. INSTALLATION

2.2 SITING THE APPLIANCE

2.3 OVERALL DIMENSIONS

2.4 CLEARANCES

2.6 ELECTRICAL CONNECTION

2.7 GAS CONNECTION

2.8 WATER CONNECTIONS

2.9 FLUE CONNECTIONS

2.10 CONTROL PANEL

2.12 REMOVING THE FRONT PANEL

2.13 ROOM THERMOSTAT CONNECTION

2.14 ELECTRICAL/SYSTEM DIAGRAMS

2.15 WATER CIRCUIT DIAGRAM

3. COMMISSIONING

3.1 INITIAL PREPARATION

3.3 OPERATIONAL ADJUSTMENTS

3.4 COMBUSTION ANALYSIS

3.6 BOILER SAFETY SYSTEMS

3.7 DRAINING THE SYSTEM

3.10 INSTRUCTING THE END USER

3.8 COMPLETION

3.9 OPERATIONAL CHECKS

4. GAS ADJUSTMENTS

4.2 ADJUSTING THE GAS PRESSURES

5. MAINTENANCE

6. SERVICING INSTRUCTIONS

6.2 TO GAIN GENERAL ACCESS

6.2.1 Removing the front panel

6.2.2 Removing the sealed chamber front cover

6.2.3 Removing the side panels

6.3 ACCESS TO THE COMBUSTION CHAMBER

6.3.1 Removing the combustion cover

6.3.3 Removing the electrodes

6.3.2 Removing the burner and jets

6.3.4 Removing the main heat exchanger

6.3.5 Removing the air pressure switch

6.3.6 Removing the fan

6.4 ACCESS TO THE GAS VALVE

6.5 ACCESS TO THE WATER CIRCUIT

6.5.2 Removing the pump pressure switch

6.5.3 Removing the safety valve

6.5.4 Removing the automatic air vent

6.5.5 Removing the pump

6.5.6 Removing the pressure gauge

6.5.7 Removing the expansion vessel

6.5.8 Removing the overheat thermostat

6.5.11 Removing the diverter valve actuator

6.6 ACCESS TO THE CONTROL SYSTEM

6.6.1 Checking the fuses

6.6.3 Removing the time clock

7. FAULT FINDING

9. TECHNICAL INFORMATION

microGenus II 31 MFFI