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

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

+ 39 hidden pages

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