Ariston CLAS HE 24, CLAS HE 30, CLAS HE 38 Installation and Servicing Instructions



Installation and Servicing Instructions

The code of practice for the installation,

commissioning & servicing of central heating systems

CLAS HE

Gas red condensing wall hung
combination boilers

G.C.N : 47-116-51 (24 kW)
G.C.N : 47-116-52 (30 kW)
G.C.N : 47-116-53 (38 kW)

Country of destination GB, IE

CLAS HE 24

CLAS HE 30

CLAS HE 38

overview

INDEX

Overview

General Information ................................................................................................. 3

Advice for the Installer .............................................................................................4

CE Labelling .................................................................................................................4

Data Plate Symbols ...................................................................................................4

Safety Regulations ....................................................................................................5

Product description

Control Panel...............................................................................................................6

Display ...........................................................................................................................6

Overall View .................................................................................................................7

Overall Dimension ....................................................................................................7

Minimum Clearances ...............................................................................................7

Technical Information ..............................................................................................8

Installation

Reference Standards ................................................................................................9

Installing the Boiler ................................................................................................ 12

Gas Connection ....................................................................................................... 13

Water Connection .................................................................................................. 13

Instructions for Opening the Casing and Performing an

Internal Inspection ................................................................................................. 13

Connecting the Flue .............................................................................................. 15

Fitting the Coaxial Flue (Ø 60/100 Horizontal) .............................................16

Fitting the 5” Flue (Ø 80/125 Horizontal / Vertical) ..................................... 17

Fitting the Coaxial Flue (Ø 60/100 Vertical) ................................................... 18

Fitting the Twin Pipe (Ø 80/80) .......................................................................... 19

Electrical Connections .......................................................................................... 23

Peripheral Unit Connection ................................................................................ 23

Room Thermostat Connection .......................................................................... 24

Outdoor Sensor Connection ..............................................................................24

Electrical Diagram .................................................................................................. 25

Commissioning

Initial Preparation ................................................................................................... 26

Electricity Supply .................................................................................................... 26

Filling the Heating System .................................................................................. 26

Filling of the DHW System ...................................................................................26

Gas Supply ................................................................................................................26

Water Treatment ..................................................................................................... 26

First Igniton Operation ......................................................................................... 27

Ignition procedure ................................................................................................. 28

Test Function and Combustion Analysis ........................................................ 30

AUTO Function ........................................................................................................31

Boiler Protection Devices

Boiler Protection Devices ....................................................................................32

Anti-Frost Device .................................................................................................... 32

Table summarising error codes ......................................................................... 32

Settings - Adjustment - Problem Identication Menus

Accessing the Menus ............................................................................................33

Maintenance

General Comments ................................................................................................ 41

General Access ........................................................................................................42

Electrical Unit ........................................................................................................... 43

Hydraulic Unit .......................................................................................................... 45

Main Heat Exchanger ............................................................................................ 53

Burner Unit ............................................................................................................... 54

Fan Unit ...................................................................................................................... 57

Gas Valve ....................................................................................................................58

Annual Maintenance ............................................................................................. 59

Spare Parts Short List ............................................................................................60

Benchmark Commissioning Checklist ............................................................ 61

Benchmark Service Interval Record ................................................................. 62

2

overview

These instructions are suitable for CLAS HE boilers :
Do not forget the Log Book!
MTS supports Benchmark, the heating industry code to ensure the correct installation, commissioning and servicing of
domestic central heating systems.

To The Householder
Make sure you have a completed Log Book for your boiler. This provides a record of the commissioning of your boiler.
It contains important information about your particular installation that may be required by service engineers. The Log Book
will also provide contact details for the installer should you need guidance in the use of this appliance or if there are any
problems.
As with your car, your boiler will work more reliably and eciently if regularly serviced. We recommend an annual service
check. The service history of the appliance will be recorded on the Log Book.
In the unlikely event of any problems with your boiler or system you should rst contact your installer. If your installer cannot
resolve the problem he should telephone our national service helpline.
A charge may be made if MTS Service is called out to resolve a non-product related fault.
Your statutory rights are not aected.

To The Installer

As part of the commissioning of this appliance it is vital that the Log Book is completed and given to the Householder. Please ensure
that your customer is aware of the importance of keeping the Log Book safe as a record of the installation and the appliance service
history.

Please ensure that your customer is aware of the correct operation of the system, boiler and controls.

MTS recommend the use of protective clothing, when installing and working on the appliance i.e. gloves.

CUSTOMER CARE

MTS, as a leading manufacturer of domestic and commercial water heating appliances is committed to providing high quality
products and a high quality after sales service.
Advice on installation or servicing can also be obtained by contacting the MTS Technical and Customer Service Departments at High
Wycombe.
TECHNIC
Tel: [phone] Tel: [phone]
Fax: [phone] Fax: [phone]

GUARANTEE

T
accordance with the recommendations made herein or in a manner not approved by the manufacturer. To assist us in providing you
with an ecient after sales service, please return the guarantee registration card enclosed with the boiler without delay.

CAUTION

In the United Kingdom, installation, start-up, adjustments and maintenance, must be performed by a competent person only, in
accordance with the current Gas Safety (Installation & Use) Regulations and the instructions provided.

In the Republic of Ireland, the installation and initial start up of the appliance must be carried out by a Competent Person in
accordance with the current edition of I.S.813 “Domestic Gas Installations”, the current Buidling Regulations, reference should also be
made to the current ETCI rules for electrical installation.

AL DEPARTMENT CUSTOMER SERVICE DEPARTMENT

he manufacturer’s guarantee is for 2 years from the date of purchase. The guarantee is invalidated if the appliance is not installed in

All CORGI registered installers carry a CORGI ID card, and have a registration number. Both should be recorded in your boiler
Log Book. You can check your installer is CORGI registered by calling CORGI direct on:- [phone].

Improper installation may cause damage or injury to individuals, animals and personal property for which the manufacturer will not
be held liable. To ensure ecient and safe operation it is recommended that the boiler is serviced annually by a competent person.

If it is known that a fault exists on the appliance, it must not be used until the fault has been corrected by a competent person.

This instruction booklet is especially designed for appliances installed in the UK and the Republic of Ireland

3

overview

MIN MAX

Advice for the installer
The installation and rst ignition of the boiler must be
performed by qualied personnel in compliance with
current national regulations regarding installation, and
in conformity with any requirements established by
local authorities and public health organisations.
After the boiler has been installed, the installer must
ensure that the end user receives the declaration of
conformity and the operating manual, and should
provide all necessary information as to how the boiler
and the safety devices should be handled.

This appliance is designed to produce hot water for domestic
use.
It should be connected to a heating system and a distribution
network for domestic hot water, both of which must be compatible
with its performance and power levels.
The use of the appliance for purposes other than those specied is
strictly forbidden. The manufacturer cannot be held responsible for
any damage caused by improper, incorrect and unreasonable use
of the appliance or by the failure to comply with the instructions
given in this manual.
Installation, maintenance and all other interventions must be
carried out in full conformity with the governing legal regulations
and the instructions provided by the manufacturer. Incorrect
installation can harm persons, animals and possessions; the
manufacturing company shall not be held responsible for any
damage caused as a result. The boiler is delivered in a carton. Once
you have removed all the packaging, make sure the appliance is
intact and that no parts are missing. If this is not the case, please
contact your supplier.
Keep all packaging material (clips, plastic bags, polystyrene foam, etc.)
out of reach of children as it may present a potential hazard.
In the event of a fault and/or malfunction, turn the appliance
o, turn o the gas cock and do not attempt to repair it yourself.
Contact a qualied professional instead.
Before any maintenance or repair work is performed on the boiler,
make sure you have disconnected it from the electricity supply
by switching the external bipolar switch to the “OFF” position and
removing the fuse.
All repairs, which should only be performed using original spare
parts, should be carried out by a qualied professional. Failure
to comply with the above instructions could compromise the
safety of the appliance and invalidate all liability on the part of
the manufacturer.
In the event of any maintenance or other structural work in
the immediate vicinity of the ducts or ue gas exhaust devices
and their accessories, switch the appliance o by switching the
external bipolar switch to the “OFF” position and shutting o
the gas control valve. When the work has been completed, ask a
qualied technician to check the eciency of the ducting and the

devices.
Turn the boiler o and turn the external switch “OFF” to clean the

exterior parts of the appliance.
Clean using a cloth dampened with soapy water. Do not use
aggressive detergents, insecticides or toxic products. If the
appliance is used in full compliance with current legislation, it
will operate in a safe, environmentally-friendly and cost-ecient
manner.
If using kits or optional extras, make sure they are authentic.

CE labelling

The CE mark guarantees that the appliance conforms to the fol­lowing directives:

- 90/396/CEE
relating to gas appliances

- 89/336/CEE
relating to electromagnetic compatibility

- 92/42/CEE
relating to energy eciency

- 73/23/CEE
relating to electrical safety

Symbols used on the data plate

Key:

1. Brand

2. Manufacturer

3. Boiler model - code

4. Serial number - certication number

5. Destination country - gas category

6. Gas setting

7. Boiler type

8. Electrical data

9. Maximum domestic hot water pressure

10. Maximum heating pressure

11. NOx class

12. Eciency

13. Max - min heat input

14. Max - min heat output

15. Max/min operating room temperature

16. Max. central heating temperature

17. Gases which may be used

4

overview

Safety regulations

Key to symbols:

Failure to comply with this warning implies the risk of
personal injury, in some circumstances even fatal
Failure to comply with this warning implies the risk of
damage, in some circumstances even serious, to property,
plants or animals.

Install the appliance on a solid wall which is not subject
to vibration.

Noisiness during operation.

When drilling holes in the wall for installation
purposes, take care not to damage any electrical
wiring or existing piping.

Electrocution caused by contact with live wires. Explosions,
res or intoxication caused by gas leaking from damaged
piping. Damage to existing installations. Flooding caused
by water leaking from damaged piping.

Perform all electrical connections using wires which
have a suitable section.

Fire caused by overheating due to electrical current
passing through undersized cables.

Protect all connection pipes and wires in order to
prevent them from being damaged.

Electrocution caused by contact with live wires. Explosions,
res or intoxication caused by gas leaking from damaged
piping. Flooding caused by water leaking from damaged
piping.

Make sure the installation site and any systems to
which the appliance must be connected comply with
the applicable norms in force.

Electrocution caused by contact with live wires which
have been installed incorrectly. Damage to the appliance
caused by improper operating conditions.

Use suitable manual tools and equipment (make sure
in particular that the tool is not worn out and that its
handle is xed properly); use them correctly and make
sure they do not fall from a height. Replace them once
you have nished using them.

Personal injury from the falling splinters or fragments,
inhalation of dust, shocks, cuts, pricks and abrasions.
Damage to the appliance or surrounding objects caused
by falling splinters, knocks and incisions.

Use electrical equipment suitable for its intended use
(in particular, make sure that the power supply cable
and plug are intact and that the parts featuring rotary
or reciprocating motions are fastened correctly); use
this equipment correctly; do not obstruct passageways
with the power supply cable, make sure no equipment
could fall from a height. Disconnect it and replace it
safely after use.

Personal injury caused by falling splinters or fragments,
inhalation of dust, knocks, cuts, puncture wounds,
abrasions, noise and vibration. Damage to the appliance
or surrounding objects caused by falling splinters, knocks
and incisions.

Make sure any portable ladders are positioned
securely, that they are suitably strong and that the
steps are intact and not slippery and do not wobble
when someone climbs them. Ensure someone provides
supervision at all times.

Personal injury caused by falling from a height or cuts
(stepladders shutting accidentally).

Make sure any rolling ladders are positioned securely,
that they are suitably strong, that the steps are intact

and not slippery and that the ladders are tted with
handrails on either side of the ladder and parapets on
the landing.

Personal injury caused by falling from a height.

During all work carried out at a certain height (generally
with a dierence in height of more than two metres),
make sure that parapets are used to surround the work
area or that individual harnesses are used to prevent
falls. The space where any accidental fall may occur
should be free from dangerous obstacles, and any
impact upon falling should be cushioned by semi-rigid
or deformable surfaces.

Personal injury caused by falling from a height.

Make sure the workplace has suitable hygiene and
sanitary conditions in terms of lighting, ventilation
and solidity of the structures.

Personal injury caused by knocks, stumbling etc.

Protect the appliance and all areas in the vicinity of the
work place using suitable material.

Damage to the appliance or surrounding objects caused
by falling splinters, knocks and incisions.

Handle the appliance with suitable protection and
with care.

Damage to the appliance or surrounding objects from
shocks, knocks, incisions and squashing.

During all work procedures, wear individual protective
clothing and equipment.

Personal injury caused by electrocution, falling splinters
or fragments, inhalation of dust, shocks, cuts, puncture
wounds, abrasions, noise and vibration.

Place all debris and equipment in such a way as to
make movement easy and safe, avoiding the formation
of any piles which could yield or collapse.

Damage to the appliance or surrounding objects from
shocks, knocks, incisions and squashing.

All operations inside the appliance must be performed
with the necessary caution in order to avoid abrupt
contact with sharp parts.

Personal injury caused by cuts, puncture wounds and
abrasions.

Reset all the safety and control functions aected
by any work performed on the appliance and make
sure they operate correctly before restarting the
appliance.

Explosions, res or intoxication caused by gas leaks or an
incorrect ue gas exhaust. Damage or shutdown of the
appliance caused by out-of-control operation.

Before handling, empty all components that may contain
hot water, carrying out any bleeding if necessary.

Personal injury caused by burns.

Descale the components, in accordance with the
instructions provided on the safety data sheet of the
product used, airing the room, wearing protective
clothing, avoid mixing dierent products, and protect
the appliance and surrounding objects.

Personal injury caused by acidic substances coming into
contact with skin or eyes; inhaling or swallowing harmful
chemical agents. Damage to the appliance or surrounding
objects due to corrosion caused by acidic substances.

If you detect a smell of burning or smoke, keep clear of
the appliance, disconnect it from the electricity supply,
open all windows and contact the technician.

Personal injury caused by burns, smoke inhalation,
intoxication.

5

product description

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

9

6

12

I

1

2

3

4

5
6

7
8

17

16

15

13

14

11

12

10

9

Control panel

Legend :

1. Display

2. R

ESET button

3. Red indicator locking light

4.

Orange indicator C

OMFORT fonction

5. Pressure gauge

6.

Heating temperature regulation knob

7. button

8.

M

9. E

10. button +

_

ENU/OK button (Programming key)

SC button

11.

Domestic Hot Water adjustment knob

12. Time clock

13. ON/OFF button

14. Blue indicator burner ON

15.

Yellow indicator A

16. A

UTO button

17. C

OMFORT button

UTO fonction

(To active Thermoregulation)

6

28

770

200

150

120 120

200

180

65 6567 67

25770

Overall view

450

003

003

50 50

1

2

3

4

5

6

7

8

9

10

11

12

13

25

24

23

22

21

20

18

19

17

15

16

product description

1. ue connector

2. air pressure switch

3.

burner

4. detection Electrode

5.

overheat thermostat

6.

C.H. Return temperature probe

7.

C.H. Flow temperature probe

8.

gas valve

9.

secondary heat exchanger

10.

D.H.W. temperature probe

11.

siphon

12. C.H. pressure relief valve

13. electrical box

15.

C.H. circuit lter

D.H.W. Flow switch

16.

17.

circulation Pump with air release valve

18.

diverter valve

19.

switch On-O

20. silencer

21. modulating Fan

22. ignition electrodes

23. ignitor

24. thermal fuse

25.

combustion Analysis Test Point

Overall Dimensions

24/30/38

A. Central Heating Flow
B. Domestic Hot Water Outlet
C. Gas Inlet
D. Domestic Cold Water Inlet
E. Central Heating Return

Minimum clearances

In order to allow easy access to the boiler for
maintenance operations, The boiler must be installed
in accordance with the clearances stated below.

5

5

7

product description

GENERAL NOTE

Model

24 kW

30 kW

38 kW

CE Certication (pin)

0085BR0347

Boiler type

B23-C13-C33-C43-C53-C83

POWER SPECIFICATIONS

Max/min nominal caloric ow rate (Pci) Qn

KW

22,0/5,5

28,0/6,5

31,0/7,5

Max/min nominal caloric ow rate (Pcs) Qn

KW

24,4/6,1

31,1/7,2

34,4/8,3

Domestic hot water max/min nominal caloric ow rate (Pci) Qn

KW

25,0/5,5

30,0/6,5

38,0/7,5

Domestic hot water max/min nominal caloric ow rate (Pcs) Qn

KW

27,8/6,1

33,3/7,2

42,2/8,3

Max/min power output (80°C-60°C) Pn

KW

21,6/5,2

27,4/6,2

30,3/7,3

Max/min power output (50°C-30°C) Pn

KW

23,5/6,0

30,0/6,9

33,1/8,0

Domestic hot water max/min power output Pn

KW

25,0/5,0

30,0/6,0

38,9/7,1

Combustion eciency (of ue gas)

%

97,9

97,9

98,0

Nominal caloric ow rate eciency (60/80°C) Hi/Hs

%

98,0/88,2

98,0/88,2

97,6/87,9

Nominal caloric ow rate eciency (30/50°C) (condensation) Hi/Hs

%

107,0/96,4

107,0/96,4

106,7/96,1

Eciency at 30% at 30°C (condensation) Hi/Hs

%

108,0/97,3

108,0/97,3

109,1/98,2

Eciency at 30% at 47°C Hi/Hs

%

101,0/90,9

98,2/88,4

103,1/92,8

Minimum caloric ow rate eciency (60/80°C) Hi/Hs

%

95,0/85,5

95,6/86,1

96,8/87,2

Eciency rating (dir. 92/42/EEC)

stars

****

****

****

Sedbuk class

class

A / 90,3

A / 90,3

A / 90,1

Loss when stopped (∆T = 50°C)

%

0,2

0,1

0,1

Loss of burner gas when operating

%

2,1

2,1

2,0

EMISSIONS

Available air pressure

Pa

137

141

132

NoX class

class55

5

Flue gas temperature (G20) (80°C-60°C)

°C6363

63

CO2 content (G20) (80°C-60°C)

%

9,0

9,0

9,6

CO content (0%O2) (80°C-60°C)

ppm

< 100

< 100

< 125

O2 content (G20) (80°C-60°C)

%

4,5

4,5

3,5

Maximum ue gas ow (G20) (80°C-60°C)

Kg/h

41,2

49,4

59,2

Excess air (80°C-60°C)

%2727

20

HEATING CIRCUIT

Expansion chamber ination pressure

bar11

1

Maximum heating pressure

bar33

3

Expansion chamber capacity

L

6,5

6,5

6,5

Maximum water capacity with in the appliance (75°C-35°C)

L

100/300

100/300

100/300

Min/max heating temperature (high temperature range)

°C

35/82

35/82

35/82

Min/max heating temperature (low temperature range)

°C

20/45

20/45

20/45

DOMESTIC HOT WATER

CIRCUIT

Domestic hot water max/min temperature

°C

36/60

36/60

36/60

Specic ow rate of domestic hot water (∆T=30°C)

l/mn

12,0

15,0

18,2

Quantity of hot water ∆T=25°C

l/mn

14,4

18,0

21,8

Quantity of hot water ∆T=35°C

l/mn

10,3

12,9

15,6

Hot water comfort rating (EN13203)

stars

***

***

***

Hot water minimum ow rate

l/mn

< 2

< 2

< 2

Domestic hot water max/min pressure

bar

7/0,3

7/0,3

7/0,3

ELECTRICAL

Power supply frequency/voltage

V/Hz

230/50

230/50

230/50

Total electrical power absorbed

W

114

115

150

Minimum ambient temperature for use

°C+5+5

+5

Protection level for the electrical appliance

PI

X5D

X5D

X5D

Weightkg323535,5

Dimension (L x H x D)

mm

440/820/385

440/820/455

440/820/455

Technical Data

8

Reference Standards

In the United Kingdom, the installation and initial start-up of the
boiler must be by a CORGI registered installer in accordance with
the installation standards currently in eect, as well as with any
and all local health and safety standards i.e. CORGI.

In the Republic of Ireland the installation and initial start-up of
the appliance must be carried out by a Competent Person in
accordance with the current edition of I.S.813 “Domestic Gas
Installations” and the current Building Regulations, reference
should also be made to the current ETCI rules for electrical
installation.

The installation of this appliance must be in accordance with
the relevant requirements of the Local Building Regulations,
the current I.E.E. Wiring Regulations, the by-laws of the local
authority, in Scotland, in accordance with the Building Standards
(Scotland) Regulation and Health and Safety document No. 635,
“Electricity at Work Regulations 1989” and in the Republic of
Ireland with the current edition of I.S. 813 and the Local Building
Regulations (IE).

C.O.S.H.H.

Materials used in the manufacture of this appliance are non­hazardous and no special precautions are required when
servicing.

Codes of Practive

Installation should also comply with the following British
Standards Code of Practice:

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 cicrulation hot water systems
BS 6798:2000 Installation of gas red hot water boilers
of rated input not exceeding 70kW
BS 6891:1989 Installation of low pressure gas pipes up to
28mm
BS 7671:2001 IEE Wiring Regulations
BS 4814:1990 Specication for expansion vessels
BS 5482:1994 Installation of L.P.G.

and in the Republic of Ireland in accordancce with the following
codes of practice:

I.S. 813 Domestic Gas Installations

Avoid installing the boiler where the air inlet can be polluted by
checmical products such as chlorine (swimming pool area), or
ammonia (hair dresser), or alkalin products (launderette).

Flue

Detailed information on ue assembly can be found in the
“Connecting the Flue” section.
The boiler must be installed so that the ue terminal is exposed
to the free passage of external air at all times and must not
be installed in a place likely to cause nuisance. It must not be
allowed to discharge into another room or space such as an
outhouse or closed lean-to.

Condensing boilers have a tendency to form a plume of water
vapour from the ue terminal due to the low temperature of
the ue gasses. The terminal should therefore be located with
due regard for the damage or discolouration that may occur to

installation

building within the vicinity and consideration must also be given
to adjacent boundaries, openable windows should also be taken
into consideration when siting the ue.

The minimum acceptable clearances are shown below:

- A Dir

ectly below an opening, window, etc 300 mm

- B Horizontally to an opening, window, etc 300 mm

- C Below gutters, soils pipes or drain pipes 75 mm

- D Below eaves 200 mm

- E From vertical drain pipe or soil pipe 75 mm

- F From internal or external corner 300 mm

- G Above ground, roof or balcony level 300 mm

- H From a surface facing the terminal 2500 mm

- I From a terminal facing a terminal 2500 mm

- J Vertically from a terminal on the same wall 1500 mm

- K Horizontally from an terminal on the same wall 300 mm

- L Fixed by vertical ue terminal

N

OTE: THE FLUE MUST NOT BE INSTALLED IN A PLACE LIKELY TO CAUSE A
NUISANCE AND POSITIONED TO ENSURE THAT PRODUCTS OF COMBUSTION DO NOT
DISCHARGE ACROSS A BOUNDARY

It may be necessary to protect the terminal with a guard, if this is
the case it will be necessary to purchase a stainless steel terminal
guard. Reference should be made to the Building Regulations
for guidance.

Ventilation

The room in which the boiler is installed does not require
specic ventilation. If the boiler is installed in a cupboard or
compartment ventillation is not required for cooling purposes.

Gas Supply

The gas installation and tightness testing must be in accordance
with the requirements of BS6891. Ensure that the pipe size is
adequate for demand including other gas appliances on the
same supply.

Electrical Supply

T

he appliance requires an earthed 230V - 50 Hz supply and
must be in accordance with current I.E.E. regulations. It must
also be possible to be able to completely isolate the appliance
electrically. Connection should be via a 3 amp douple pole fused
isolating switch with contact separation of at least 3mm on both
poles. Alternatively, a fused 3 Amp, 3 pin plug and unswitched
socket may be used, provided it is not used in a room containing
a bath or shower, it. It shoild only supply the appliance.

9

installation

Water Supply

The boiler is suitable for sealed systems only. The maximum
working pressure for the appliance is 6 bar. All ttings and
pipework for the appliance should be of the same standard. If
there is a possibility of the incoming mains pressure exceeding 6
bar, particularly at night, then a suitable pressure limiting valve
must be tted.
The boiler is designed to provide hot water on demand to
multiple outlets within the property. If there is a requirement for
greater demands, for example if the boiler has several bathrooms
and cloakrooms, a vented or unvented hot water storage system
may be used.

Showers

Any shower valves used with the appliance should be of a
thermostatic or pressure balanced type. Refer to the shower
manufacturer for performance guidance and suitability.

Flushing and Water Treatment

The boiler is equipped with a stainless steel heat exchanger.

The detailed recommendations for water treatment are given in
BS 7593:199
heating systems); the following notes are givent for general
guidance;

If the boiler is installed on an existing system, any unsuitable
additives must be removed.

Under no circumstances should the boiler be red before the
system has been thoroughly ushed; the ushing procedure
must be in line with BS 7593:199

We highly recommend the use of a ushing detergent
appropriate for the metals used in the circuit. These include
cleansers produced by Fernox BetzDearbon, whose function is to
disolve any foreign matter that may be in the system;

In hard water areas or where large quantities of water are in the
system the treatment of water to prevent premature scaling of
the main exchanger is necessary.

The formation of scale strongly compromises the eciency of
the thermic exchanger because small areas of scale cause a high
increase of the temperature of the metallic walls and therefore
add to the thermal stress of the heat exchanger.

Demineralised water is more aggressive so in this situation it
is necessary to treat the water with an appropriate corrosion
inhibitor.

2 (Treatment of water in domestic hot water central

2.

Preiodically check the pH balance of the water/anti-freeze
mixture of the boiler circuit and replace it when the amount
measured is out of the range stipulated by the manufacturer (7
< pH < 8).
DO NOT MIX DIFFERENT TYPES OF ANTI-FREEZE

In under-oor systems, the use of plastic pipes without
protection against penetration of oxygen through the walls can
cause corrosion of the systems metal parts (metal piping, boiler
etc), through the formation of oxides and bacterial agents.

To prevent this problem it is necessary to use pipes with an
“oxygen proof barrier”, in accordance with standards DIN
47

26/4729. If pipes of this kind are not used, keep the system

separate by installing heat exchangers of those with a
specic system water treatment.

IMPORTANT
Failire to carry out the water treatment procedure will
invalidate the appliance guarantee.

System Controls

The boiler is electrically controlled and is suitable for most
modern electronic time and temperature controls. The addition
of such external controls can be benecial to the ecient
operation of the system. The boiler connections for external
c

ontols are 12V DC and so only controls of 12V DC that have
voltage free contacts should be used. (page 24).
MTS supply a range of wired and wireless system controls.
Contact your supplier for more details.

Location

The boiler can be installed on any suitable internal wall
(suitable sound proong may be required when installing
onto a stud partition wall). Provision must be made to allow
for the correct routing of the ue and siting of the terminal
to allow the safe and ecient removal of the ue products. A
compartment or cupbaord may be used provided that it has
been built or modied for this purpose. It is not necessary to
provide permanent ventillation for cooling purposes. Detailed
r

ecommendations are given in BS 5440 Part 2. If it is proposed
that it is to be installed in a timber framed building then
r

eference should be made to British Gas Document DM2, IGE/
UP/7 or advice sought from CORGI.

Where a room sealed appliance is installed in a room
containing a bath or shower, the appliance and any electrical
switch or appliance control, utilising mains electricity should
be situated specically in accordance with current IEE Wiring
Regulations.

Any treatment of water by additives in the system for frost
protection or for corrosion inhibition has to be absolutely
suitable for all metals used in the circuit.

The use of a corrosion inhibitor in the sysem such as Fernox
MB-1, BetzDearborn Sentinel X100 or Fernox System Inhibitor
is recommended to prevent corrosion (sludge) damaging the
boiler and system;

If anti-freeze substances are to be used in the system, check
carefully that they are compatible with the metals used in the
circuit.

MTS suggests the use of suitable anti-freeze products such as
Fernox ALPHI 11, which will prevent rust and incrustation taking
place.

10

For unusual locations, special procedures may be necessary. BS

6798:2000 gives detailed guidance on this aspect.

Codensate Discharge

The condensate discharge hose from the boiler must have a
c

ontinuous fall of 2.5
into a suitable acid resistant pipe - e.g. plastic waste or overow
pipe. The condensate discharge pipe must have a minimum
diamet

er of 22mm, must have a continuous fall and preferably
be installed and terminated to prevent freezing.
The discharge pipe must be terminated in a suitable position:

i)

Connecting into an internal soil stack (at least 450mm above
the invert of the stack). A trap giving a water seal of at least
75mm must be inc
must be an air beak upstr

o

and must be inserted by at least 50mm

orporated into the pipe run, there also

eam of the trap.

installation

ii) Connecting into the waste system of the building such as a
washing maching or sink trap. The connection must be
upstr

eam of the washing machine/sink. If the connection
is down stream of if the waste trap then an additional trap
giving a minimum water seal of 75mm and an air break must be
incorporated in the pipe run, as above.

iii)

Terminating into a gully, below the grid level but above the

w

ater level

iv) Into a soakaway

Note: If any condensate pipework is to be installed externally
then it should be kept to a minimum and be insulated with a
waterproof insulation and have a continuous fall. The total length
of external pipe used should not exceed 3 metres.

Some examples of the type of condensate terminations can be
found below.

1. Internal termination of codensate drainage pipe to internal
stack.

3. External termination of condensate drainage pipe via internal
discharge branch (e.g. sink waste - proprietary tting).

4. External termination of condensate drainage pipe via
condensate siphon

2

. External terminaton of condensate drainage pipe via internal

discharge branch (e.g. sink waste) and condensate siphon.

11

installation

Note: Connections viewed from behind boiler

A

A

Installing the Boiler

Please check that you are familiar with the installation
requirement before commencing work (pages 7 - 11).

The installation accessories described in the following list are
included in the boiler packaging:

-

Hanging bracket

- A paper template (showing the dimensions of the boiler with
5 mm side clear

- Connection valves (Compression)

- Screws and washers

- Filling loop

- Installation, Servicing and Operating Instructions

- Flue gasket

Method of positioning the boiler on the wall

The paper template can be used to ensure the correct
positioning of kitchen cabinets etc.

The paper template has to be xed to the wall and used to locate
the position of the hanging bracket and the centre for the ue
hole.
Drill and plug the wall and secure the hanging bracket using
the screws provided. Remove the boiler from it’s packaging and
remove the front casing panel.
Place the boiler on the hanging bracket.

ances)

N

OTE: THE APPLIANCE MUST NOT BE FITTED ON A COMBUSTIBLE WALL SURFACE.

Connecting the Boiler to the System

-

Remove the boiler casing as described on page 13;

- Remove the caps and connect the valves to the boiler using
the w

ashers provided;

- 4 x bre washers for the CH ow and return, cold water inlet
and hot w

ater outlet connections;

Safety Valve Discharge and Condense Outlet

The pressure relief valve tube is made of copper. It should
terminate below the boiler safely outside the premises. Care
should be taken that it does not terminate over an entrance or
window or where a discharge of heated water could endanger
occupants or passers by.

Fill the central heating and DHW system and bleed air from the
system as described in the Commissioning instructions (page
2

6).

The system should be carefully checked for leaks, as frequent
relling could cause premature system corrosion or unnecessary
scaling of the heat exchanger. The pipe from the trap should be
connected to a drain as described in the relevant regulations.

Pay special attention not to bend the condensate silicone drain
pipe is such a way as to interrupt the ow. Please only use drain
pipe material compatible with condensate products (refer to BS
6798:

2000).

The condensate ow can reach 2 litres/hour because of the
acidity of the condensate products (Ph close to 2), take care
before operation.

See page 11 for condensate discharge possibiities.

12

- remove the 2 screws A from the transport bar

- dispose of the transport bar and reassemble
the xing screws.

installation

A

B

C

D

E

I

H

F

Gas connection

Make sure, using the labels on the packaging and the data plate
on the appliance itself, that the boiler is in the correct country
and that the gas category for which the boiler was designed
corresponds to one of the categories available in the country
where it will be used.
The gas supply piping must be created and measured out in
compliance with specic legal requirements and in accordance
with the maximum power of the boiler; you should also make sure
that the shut-o valve is the right size and that it is connected
correctly.
Check that the supplied gas corresponds to the type of gas for
which the boiler was designed (see the data plate located on the
appliance itself).
It is also important to check that the pressure of the gas (methane
or LPG) you will be using to feed the boiler is suitable, because if it
is insucient the power may be reduced, causing inconvenience
for the user.

Instructions for opening the casing and performing an
internal inspection

Before performing any work on the boiler, rst disconnect it from
the electrical power supply using the external bipolar switch
removing the fuse and shutting o the gas valve.
To access the inside of the boiler, the following is necessary:

1. Remove the casing by unhooking it from the control panel (a)

2. Loosen the two screws on the front casing (b), pull it forwards
and unhook it from the upper pins (c)

3. Lower the control panel (d)

4. Unhook the two clips on the combustion chamber panel and
lift o (e).

(a)

(b)

Water connection

The illustration shows the connections for the water and gas
attachments of the boiler. See valves conguration on page 13.
Check that the maximum water mains pressure does not exceed 6
bar; if it does, a pressure reducing valve must be installed.
For the measuring of the pipes and of the heating bodies in the
heating system, the residual head value should be calculated as a
function of the requested ow rate, in accordance with the values
shown in the circulation pump graph.

(c)

(d)

(e)

A. Central heating Flow E. Central Heating Return
B

. Domestic Hot Water Outlet F. Safety Valve Discharge

C.

Gas Inlet H. Drain Valve

D

. Domestic Cold Water Inlet I. Drain condensate

13

installation

0

50

100

150

200

250

300

350

400

450

500

0 100 200 300 400 500 600 700 800 900 1000 1100 1200

mbar

l/h

24 kW

30-35 kW

A

B

C

D

E

I

G

H

F

2

1

4

3

11

8

10

9

12

13

14

15

16

17

18

19

20

21

22

7

6

5

A B C D E

To calculate the size of the heating installation, refer to the
"Available pressure" graph below.

Graph representing the available circulation pump pressure

o

T20

C

30-38 kW

Before the rst time the equipment is used, the trap must

be lled with water. To do this, add approximately 1/4
litre of water via the ue outlet before tting the ue
system, or unscrew the cap on the trap positioned under­neath the boiler, ll it with water and ret it

Warning! insucient water in the trap can temporarily
cause the ue gas to be expelled into the surrounding
ambient air

Water circuit diagram

Underoor heating

For appliances with underoor heating, t a safety thermostat
onto the underoor heating outlet. For the electrical connec­tion of the thermostat see the section on “Electrical connections

- page

24”.

If the outlet temperature is too high, the boiler will stop both do­mestic hot water and the heating production and the error code 1
16 “oor thermostat contact open” will appear on the display. The
boiler will restart when the thermostat is closed during automatic
resetting.

If the thermostat cannot be installed, the underoor heating equi­pment must be protected by a thermostatic valve, or by a by-pass
to prevent the oor from reaching too high a temperature.

14

1. Manual air vent

2. Overheat thermostat

3.

Burner

4.

Detection electrode

5.

C.H. ow temperature

probe

6.

C.H. return temperature

probe

7.

Secondary heat ex-

changer

8.

C.H. pressure relief valve

1

2. Condensate trap

14. C.H. circuit lter

15.

D.H.W. Flow switch

16.

diverter valve

17.

water pressure sensor

18.

circulation Pump

19.

expansion vessel

20. modulating Fan

21. ignition electrodes

22. thermal fuse

9. D.H.W. temperature
probe

10.

By-pass

11. Drain valve

Connecting the Flue

118 mm

See table

118 mm

4

Flue System
The provision for satisfactory ue termination must be made as
described in BS 5440-1.
The appliance must be installed so that the ue terminal is expo­sed to outdoor 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, it
must also be located in a place not likely to cause nuisance.
In cold or humid weather water vapour may condense on leaving
the ue terminal.
The eect of such “steaming” must be considered.
If the terminal is less than 2 metres above a balcony, above
ground or above a at roof to which people have access, then a
suitable stainless steel terminal guard must be tted.

The minimum acceptable spacing from the terminal to obstruc­tions and ventilation openings are specied in Fig. 1.

installation

Fig. 1

- A Directly below an opening, window, etc 300 mm

- B Horizontally to an opening, window, etc 300 mm

- C Below gutters, soils pipes or drain pipes 75 mm

- D Below eaves 200 mm

- E From vertical drain pipe or soil pipe 75 mm

- F From internal or external corner 300 mm

- G Above ground, roof or balcony level 300 mm

- H From a surface facing the terminal 2500 mm

- I From a terminal facing a terminal 2500 mm

- J Vertically from a terminal on the same wall 1500 mm

- K Horizontally from an terminal on the same wall 300 mm

- L Fixed by vertical ue terminal

See table on page 21

Fig. 2

180

15

installation

150 mm

118

* pente 5 mm par mètre

150 mm

* pente

Warning

The exhaust gas ducts must not be in contact with or close to
inammable material and must not pass through building struc­tures or walls made of inammable material.
When replacing an old appliance, the ue system must be chan­ged.

Important

Ensure that the ue is not blocked.
Ensure that the ue is supported and assembled in accordance
with these instructions.

Installation without extension

Installation with extension

slope

Fitting the Coaxial Flue
(Ø 60 / 100 Horizontal)

Contents:
1x Silicone O-Ring (60mm)
1x Elbow (90°)
2x Wall Seals (Internal & External)
1x Flue Pipe including Terminal (1 metre - 60/100)
2x Flue Clamps
4x Screws
2x Seals

Once the boiler has been positioned on the wall, t the rubber
ue seal into the internal ue turret (see diagram opposite),

insert the elbow into the socket and rotate to the required po­sition. note: It is possible to rotate the elbow 360° on its vertical
axis.

Level

Fig. 3

Level

slope 5 mm per metre

e.g.
X = 555mm
753-555 = 198mm (Length to be cut from the plain end of the
ue).

Once cut to the required length, ensure that the ue is free from
burrs and reassemble the ue. If tting the ue from inside of the
building attach the grey outer wall seal to the ue terminal and
push the ue through the hole, once the wall seal has passed
through the hole, pull the ue back until the seal is ush with the
wall. Alternatively, the ue can be installed from outside of the
building, the grey outer seal being tted last.

Should the ue require extending, the ue connections are push
t, however, one ue bracket should be used to secure each
metre of ue.

Note: See table for maximum and minimum ue runs.

Using the ue clamp, seals and screws supplied (Fig 4) secure the
elbow to the boiler.

The 1 metre horizontal ue kit (3318073) supplied is suitable for
an exact X dimension of 753mm.

Measure the distance from the face of the external wall to the
face of the ue elbow (X - Fig 2), this gure must now be su­btracted from 753mm, you now have the total amount to be cut
from the plain end of the ue.

Draw a circle around the outer ue and cut the ue to the requi­red length taking care not to cut the inner ue, next cut the inner
ue ensuring that the length between the inner and outer ue is
maintained. (Fig 4).

16

Clamp

180 mm

installation

Screws

Seal

Fig. 4

Fitting the 5” Flue
(Ø 80 / 125 Horizontal/vertical)

Fig. 5

Once the boiler has been positioned on the wall, it is necessary
to insert the Ø80/125 adaptor (Fig. 5) for both horizontal and
vertical ue runs into the boiler ue socket (not supplied with
ue kit - Part No 3318095).

Push the adaptor onto the boilers ue connection, grease the
seals then add extensions or elbows as required, secure the
adaptor, using the clamp and screws provided.

To t extensions or elbows it is rst necessary to ensure that the
lip seal is tted correctly into the inner ue, once veried, it is
simply necessary to push them together, no clamps are neces­sary to secure the ue components.

Before proceeding to t the ue, ensure that the maximum
ue length has not been exceeded (See the tables) and that all
elbows and bends have been taken into consideration, the ma­ximum ue length is 10 metres, for each additional 90° elbow 1
metre must be subtracted from the total ue length, and for each
45° 0.5 metres must be subtracted from the total ue length (the
height of the vertical adaptor and a 45° bend can be seen in Fig.6
and a 90° bend in Fig. 7).

Note: DO NOT cut the vertical ue kit.

Fig. 6 Fig. 7

17

installation

180 mm

Fitting the Coaxial Flue
(Ø 60 / 100 Vertical)

Note: See table for maximum and minimum ue runs.

Contents:
1x Silicone O-Ring (60mm)
1x Conical Adaptor (60/100mm)
1x Vertical Flue Kit (80/125mm)
3x Screws

The vertical ue kit is supplied with a specially designed weather
proof terminal tted, it can be used either with a at roof or a
pitched roof.

The Vertical ue kits useable lengths with the pitched roof
ashings are indicated in Fig. 7.

Before proceeding to t the ue, ensure that the maximum
ue length has not been exceeded (See the tables) and that
all elbows and bends have been taken into consideration, the
maximum ue length is see table, for each additional 90° elbow
1 metre must be subtracted from the total ue length, and for
each 45° 0.5 metres must be subtracted from the total ue length
(the height of the vertical adaptor and a 45° bend can be seen in
Fig. 8).

Mark the position of the ue hole in the ceiling and/or roof (see
Fig. 7 for distance from wall to the centre of the ue).

Fig. 7

Cut a 130mm diameter hole through the ceiling and/or roof and
t the ashing plate to the roof.

DO NOT cut the vertical ue kit.

To connect the vertical ue kit directly to the boiler, place the
vertical starter kit (Part No. 3318079) (see Fig. 7) onto the exhaust
manifold and secure with the clamp, t the vertical adaptor onto
the vertical starter kit (note: there is no need to use a clamp to
secure this as it is a push t connection), the vertical ue kit must
then be inserted through the roof ashing, this will ensure that
the correct clearance above the roof is provided as the terminal is
a xed height.

Should extensions be required, they are available in 1 metre (Part
No. 3318077), 500mm (Part No. 3318078) and 160mm lengths,
they must be connected directly to the vertical starter kit before
connecting the adaptor to allow the vertical ue kit to be tted.
In the event that extension pieces need to be shortened, they
must only be cut at the male end and it must be ensured that
the inner and outer ue remain ush.

When utilising the vertical ue system, action must be taken to
ensure that the ue is supported adequately to prevent the wei­ght being transferred to the appliance ue connection by using 1
ue bracket per extension.

18

Fig. 8

When the ue passes through a ceiling or wooden oor, there
must be an air gap of 25mm between any part of the ue system
and any combustible material. The use of a ceiling plate will faci­litate this. Also when the ue passes from one room to another
a re stop must be tted to prevent the passage of smoke or re,
irrespective of the structural material through which the ue
passes.

installation

Fitting the Twin Pipe (Ø80 / 80)

When siting the twin ue pipe, the air intake and exhaust
terminals must terminate on the same wall, the centres of the
t

erminals must be a minimum of 280 mm apart and the air intake
must not be sited above the exhaust terminal (refer to Fig. 10).
The air intake pipe can be run horizontally, however, the terminal
and the nal 1 metre of ue must be installed either horizontally
or with a slight fall away from the boiler to avoid rain ingress.

It is also strongly recommended that the air intake pipe run be
constructed of insulated pipe to prevent condense forming on
the outside of the tube.

The maximum permissible ue length for twin ue is dependent
on the type of run used (see table on page 21).

For further information relating to ue runs not illustrated, please
contact the Technical Department on 0870 241 8180.

Note: See table for maximum and minimum ue runs.

Where it is not possible to terminate the ue within the distance
permitted for coaxial ues, the twin ue pipe can be used by
tting a special adaptor to the ue connector and using the aper­ture for the air intake located on top of the combustion chamber.

Always ensure that the ue is adequately supported, using one
ue bracket per extension and avoiding low points. (MTS supply
suitable clamps as Part No. 705778).
To utilise the air intake it is necessary to:

1) Take the air intake cover o the top of the appliance
) Assemble the ange on the header supplied with the boiler

2

3) Insert the header on the tube or the elbow up until the lower

stop (you do not have to use the washer).

4) Insert the elbow/header in the boiler air intake hole and fasten

it with screws.

The twin ue pipes can be tted with or without additional
elbows and need no clamps, simply ensure that the red o-ring is
inserted in the female end of the ue pipe and push the exten­sion piece fully into the previous section of ue pipe or elbow,
check that the o-ring is not dislodged when assembling the ue
(greasing the seal will aid assembly).

Twin pipe can also be converted back to Coaxial ue to enable
vertical termination with a coaxial kit by using the pipe bridge
(Twin - Coaxial Adaptor - Part No. 3318089). When running the
twin ue pipe vertically.

It is not possible to terminate concentrically horizontally. Termi­nation is only possible with separate air and exhaust terminals.

19

installation

EXHAUST

AIR INTAKE

AIR INTAKE

AIR INTAKE MUST NOT BE

FITTED ABOVE THE EXHAUST

195

105

120

180

Fig. 9

For coaxial systems, the maximum development value, mentio­ned in the table below also takes into account an elbow.
For twin ue systems the maximum development value, mentio­ned in the table includes the exhaust gas/air intake terminal.

Type 5 outlets should respect the following instructions:
1- Use the same ø 80 mm ue pipes for the air intakes and

exhaust gas ducts.

2- If you need to insert elbows in the air intake and exhaust gas

ducts, you should consider for each one the equivalent length

to be included in the calculation of developed length.
3- The exhaust gas duct should jut above the roof by at least 0.5 m.
4- The intake and exhaust gas ducts in Type C13 + C53 must be

installed on the same wall, or where the exhaust is vertical and

the air intake horizontal, the terminals must be on the same

side of the building.

Fig. 10

20

Table of ue gas exhaust duct lengths

COAXIAL SYSTEM

FLUE TYPE

MAX

LENGTH

DIAMETER of

PIPE

C13

Flue gas exhaust and air suction duct

through external wall in the same range

of pressure

24 kW

12 m
36 m

60/100
80/125

30 kW

10 m
30 m

60/100
80/125

38 kW

6 m

18 m

60/100
80/125

C 33

Flue gas exhaust and air suction duct

from outside with roof terminal in the

same range of pressure

24 kW

12 m
42 m

60/100
80/125

30 kW

10 m
35 m

60/100
80/125

38 kW

8 m

21 m

60/100
80/125

C43

Individual or shared ue gas exhaust and

air suction through ue ducting built into

the building

24 kW

12 m

0 m

60/100
80/125

30 kW

10 m

0 m

60/100
80/125

38 kW

8 m
0 m

60/100
80/125

installation

21

installation

TWIN-PIPE SYSTEM

FLUE TYPE

MAX

LENGTH

DIAMETER of

PIPE

C13

Flue gas exhaust and air suction duct

through external wall in the same range

of pressure

24 kW

36 m

(S1=S2)

80/80

30 kW

30 m

(S1=S2)

35 kW

18 m

(S1=S2)

C 33

Flue gas exhaust andair suction duct from

outsidewithroof terminalin the same

range of pressure

24 kW

60 m

(S1=S2)

80/80

30 kW

50 m

(S1=S2)

35 kW

21 m

(S1=S2)

C53

Flue gas exhaust leading outside and air

suction duct through external wall not in

the same range of pressure

24 kW

84 m

(S1+S2)

80/80

30 kW

70 m

(S1+S2)

35 kW

42 m

(S1+S2)

S1 = Air intake S2 = Flue gas exhaust

S1 = S2 - Air intake and ue gas exhaust equal lengths
S1 + S2 - Air intake and ue gas exhaust unequal lengths

22

installation

H03V2V2-F

120

140

WARNING
Before performing any work on the boiler, rst
disconnect it from the electrical power supply using
the external bipolar switch and remove the fuse.

Electrical connections

For increased safety, ask a qualied technician to perform a
thorough check of the electrical system.
The manufacturer is not responsible for any damage caused by
the lack of a suitable earthing system or by the malfunctioning of
the electricity mains supply.
Make sure that the system is able to withstand the maximum
power absorbed by the boiler (this is indicated on the appliance
data plate). Check that the section of the wires is suitable and is
not less 1.5 mm
The appliance must be connected to an eecient earthing system

if it is to operate correctly.
The power supply cable must be connected to a 230V-50Hz
network, where the L-N poles and the earth connection are all
respected.
Important!
In the event that the power supply cable must be changed, replace
it with one with the same specications.

Power supply cable

2

Peripheral unit connection

To access peripheral unit connections carry out the following
steps:

- Disconnect the boiler from the power supply

- Remove the casing by unhooking it from the instrument
panel

- Rotate the control panel while pulling it forwards

- Unscrew the three screws on the back cover of the instrument
panel

- Unhook the right side clip and the right front clip; then lift the
ap

The terminal board (see gure) may be accessed in order to connect:

Outdoor sensor
Room thermostat 1

Optional P.C.B.s can also be installed for further accessories:

BUS P.C.B. Clima Manager
Modulating Room Sensor
Programmable Room Thermostat
Outdoor Sensor

- other plugs: for managing multi-zones

multitemperatures, Solar kit, etc...

Important!
The appliance is supplied with a y-lead already
connected, this must be connected to a 240V supply
fused at 3 Amp and must facilitate completed
electrical isolation of the appliance, by use od a fused
double pole isolator having a contact separation of
at least 3mm in all poles or alternatively by means of
a 3A fused three pin plug and unswitched shuttered

socket outlet both complying with BS1363.

The use of multiplugs, extension leads or adaptors is strictly
prohibited.
It is strictly forbidden to use the piping from the hydraulic, heating
and gas systems for the appliance earthing connection.
The boiler is not protected against the eects caused by lightning. If the
mains fuses need to be replaced, use 2A rapid fuses.

Caution!
For the connection and positioning of the wires
belonging to optional peripheral units, please refer to
the installation manuals of these units.

23

installation

CARTE CHAUDIERE

AMPC-GAL1

Transmetteur BUS

(Optionnel)

Emplacement

carte optionnelle

SETA1

Connector SE on PCB

Outdoor Sensor

Connector TA on PCB
(low voltage switching)

Connector TA on PCB
(low voltage switching)

Connector TA on PCB
(low voltage switching)

Room Thermostat / Remote Clock Connection

To connect a room thermostat, it is necessary to:

1. Open the control panel
2

. Loosen the cable clamp using a screwdriver and insert the wires

leading from the room thermostat

3. Connect the wires to the terminals as indicated in the gure
below, removing the link

4. If a remote time clock is to be tted, using a volt free switching
time clock connect the switching wires from the time clock
following points 1 - 3 above

5. If using an external time clock and room thermostat, these must
be connected in series as shown in diagram C,

6. Ensure that they are well connected and not subject to stress
when the control panel is closed

Outdoor sensor connection

- Introduce the outdoor sensor wires

- Loosen the cable clamp using a screwdriver and insert the
wires leading from the outdoor sensor one at a time.

- Connect the wires to the terminals as indicated in the gure
below;

- Make sure that they are well connected and that they are
not subject to stress when the control panel lid is opened or
closed;

- Close the ap again, then replace the control panel cover and
the front casing.

- Refer to page 39 for setting the parameters when using the
outdoor sensor.

NOTE: WHEN CONNECTING THE BOILER TO EXTERNAL CONTROLS, DO
NOT RUN 240V CABLES AND CABLES FOR SWITCHING CIRCUITS

24

(WHICH ARE LOW VOLTAGE) TOGETHER, USE SEPERATE CABLES TO
PREVENT INDUCED VOLTAGE ON THE LOW VOLTAGE CIRCUITS.

Electrical diagram

8

1

Collegamento

schedino BUS

Connessione
sonda solare

bus-translator

(optional)

Predisposizione

schede opzionali

5

1

ON

Display

Display

1 8

Flussimetro

sanitario

Elettrodo

Rilevazione

Ventilatore

AccenditoreValvola gas

Valvola dev.
motorizzata

L N

FAN

VALVOLA
GAS

ACCENDITORE

EARTH

FLAME

FLOW

PUMP

ZONE1

FILLING

PUMP

SPEED

1

1

FUSE 2AT

1 2 3 4 1 2 3 45 6

Circolatore

6

1

1

234

Termostato
Ambiente 1

Sonda

Esterna

Termostato
impianti a
bassa temp.

Sonda NTC
mandata risc.

CN04

CN04

CN07

CN22

CN22

Pressostato
di minima

Sonda NTC
ritorno risc.

Term. protezione
scambiatore

Sonda NTC
sanitario

P

13 12 11 10 9 8 7 6 5 4 3 2 1

12 11 10 9 8 7 6 5 4 3 2 1

11 10 9 8 7 6 5 4 3 2 1

11 10 9 8 7 6 5 4 3 2 1

2

1

8 7 6 5 4 3 2 1

Termostato
sovratemperatura

For increased safety, ask a qualied technician to perform a

thorough check of the electrical system.

The manufacturer is not responsible for any damage caused by

the lack of a suitable earthing system or by the malfunctioning of

the electricity mains supply.

room

thermostat 1

Low tempe­rature oor
heating
thermostat

bus translator (optional)

external

sensor

Optional board plate

diverter

valve

D.H.W ow

switch

circulation

pump

gas

valve

display

overheat ther-

mostat

ignitor

detection
electrode

C.H. ow

temp. probe

C.H. return

temp. probe

installation

25

D.H.W temp. probe

thermostat

Water pressure

sensor

modulating

fan

thermal fuse

commissioning

Initial preparation

MTS (GB) Limited support the benchmark initiative. On pages
pages 65 and 66 of this manual the Benchmark Commissioning
Chec klist and Servi ce inter val Record c an be found. It
is important that this is completed in the presence of your
customer, they are shown how to use it, and it is signed by them.
Please instruct your customer that they must have this manual
with them whenever they contact a service engineer or us.

Preliminary electrical system checks to ensure electrical safety
must be carried out by a competent person i.e. polarity, earth
continuity, resistance to earth and short circuit.

Electricity supply

- Check that the voltage and frequency of the electricity supply
correspond to the data shown on the boiler data plate;

- Make sure that the earthing connection is ecient.

Filling the Heating System:

Switch the electrical supply to the boiler on in order to view the
system pressure on the display;
Remove the front casing panel and lower the control panel as
described on page 13).
Open the central heating flow and return cocks supplied with the
connection kit;
Lift the cap on the automatic air release valve and leave open
permanently;
Close all air release valves on the central heating system;
Gradually open the valves at the filling point (filling loop) 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;
Refit the pump plug;
Continue filling the system until at least 1.5 bar registers on the
pressure gauge;
Inspect the system for water tightness and remedy any leaks
discovered.

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

Water Treatment:

The boiler is equipped with a stainless steel heat exchanger.
The detailed recommendations for water treatment are given in
BS 7593:1992 (Treatment of water in domestic hot water central
heating systems); the following notes are given for general
guidance;

If the boiler is installed on an existing system, any unsuitable
additives must be removed;

Under no circumstances should the boiler be fired before the
system has been thoroughly flushed; the flushing procedure
must be in line with BS7593:1992.

Firstly fill the central heating system with the power off, and
flush through cold, fill the central heating system again, adding
a flushing detergent, run the boiler on central heating until it
reaches its operating temperature and flush the system, refill the
system with a suitable corrosion inhibitor,

NOT E: FAILU RE TO CARR Y OUT THE FLUSH ING PROCE DURE WILL RESU LT IN THE

WARRANTY BECOMING VOID.

IMPORTANT!
MANUALLY VENT THE HEAT EXCHANGER AT THE MANUAL AIR VENT. FAILURE TO

VENT ADEQUATELY MAY DAMAGE THE HEAT EXCHANGER (PAGE 7, LEGEND 2).

Filling of the DHW System:

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

Gas Supply:

Inspect the entire installation including the gas meter and test
for tightness. 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 on the the appliance is a 15mm nut and olive
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 the other
appliances when they are in use at the same time.

Pipe work must be of an adequate size. Pipes of less than 22mm
should not be used, final connection being 15mm.

26

FIRST IGNITION OPERATION

Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installer . . . . . . . . . . . . . . . . . . . . . . . . . .

commissioning

1. Check the electrical supply.

Complete . . . . . . . . . . . . . . . . . . .

4. Measure the gas inlet.

Complete . . . . . . . . . . . . . . . . . . .

7. Check the hydraulic water
tightness.

Complete . . . . . . . . . . . . . . . . . . .

10. Change the language in
the display (if necessary).

2. Check the type of gas and
change the gas if necessary.

Complete . . . . . . . . . . . . . . . . . . .

5. Check the exhaust fume.
See section….

Complete . . . . . . . . . . . . . . . . . . .

8. Spin the pump.

Complete . . . . . . . . . . . . . . . . . . .

11. Set the hour, and the date.
See section….

3. Check the gas tightness.

Complete . . . . . . . . . . . . . . . . . . .

6. Fill the installation. See
section….

Complete . . . . . . . . . . . . . . . . . . .

9. Purge the air with once
pressing on ESC button
during 5 sec. See section….

Complete . . . . . . . . . . . . . . . . . . .

12. Set the heating power. See
section….

Complete . . . . . . . . . . . . . . . . . . .

13. Adapt the regulation at
the heating installation.

Complete . . . . . . . . . . . . . . . . . . .

16. Adjust DHW ow rate on
the boiler (if necessary).

Complete . . . . . . . . . . . . . . . . . . .

19. Explain to the end user the
working of the boiler.

Complete . . . . . . . . . . . . . . . . . . .

Complete . . . . . . . . . . . . . . . . . . .

14. Balance the central
heating circuit.

Complete . . . . . . . . . . . . . . . . . . .

17. Make a combustion rate
with once pressing on
RESET button during 5 sec.

Complete . . . . . . . . . . . . . . . . . . .

Complete . . . . . . . . . . . . . . . . . . .

15. Check the working in DHW
mode.

Complete . . . . . . . . . . . . . . . . . . .

18. Check the ionisation
current.

Complete . . . . . . . . . . . . . . . . . . .

27

commissioning

25

30

35

18

Ignition procedure

Press the ON/OFF button on the control panel to switch on the
boiler. The display shows:

The operating mode will be indicated by the three gures marked
out on the diagram above.

The rst gure indicates the operating mode:

X - Stand-by, the scrolling text show the operation mode

0 X

selected “summer” or “winter”

C XX - “C.Heating active” - Central heating request
c XX - “CH Pump Overrun” - Heating post-circulation
d XX - “DHW Active” - Domestic hot water request
h XX - “DHW Pump Overrun” hot water post-circulation
F XX - “Pump Frost Prot” - circulation pump anti-freeze
protection enabled

- “Burn Frost Prot” - burner anti-freeze
protection enabled

The second and third gures indicate:

-

the ow temperature when no heating requests have been made

- the ow temperature in central heating mode

-

the set temperature of the hot water in domestic hot water

- the ow temperature in anti-freeze mode.

(See below). If you need to stop it press E

SC, alternatively it is

possible to manually vent the heat exchanger.

-

At the end, check that the system is completely deaerated

and, if not, repeat the procedure.

-

Bleed the air from the radiators;

- The exhaust duct for combustion products should be suitable
and free from any obstructions;

Any necessary ventilation inlets in the room should be open

­(type B installation).

2. Open

the gas cock and check the connection seals, including
the boiler connection joints, making sure that the meter does
not detect any passage of gas. Eliminate any leaks.

3. S

tart the boiler by selecting the heating or domestic hot water

operation using the M

ODE button.

Description of Function
Deaeration cycle

During the lling stage or if there is excess air in the system, the
deaeration cycle can be activated by holding the E

SC button for 5

seconds. The boiler will start a cycle which lasts approximately 7
minutes. When this is complete the menu screen will be restored.
The cycle may either be repeated, if necessary, or stopped by
pressing E
restored. I

SC. Press the ESC button until the normal display screen is

F THE CYCLE IS STOPPED BE SURE TO MANUALLY VENT THE APPLIANCE.

Maximum Heating Power adjustment

The maximum heating power can be adjusted to between the
maximum power allowed by the boiler and the minimum pow­er).
The display shows the value between 100% (“99” on the display)
and 0% (“0”) of this interval.
T

o check the maximum heating power, access menu 2/sub
menu 3/parameter 1, check the value and, if necessary, modify it
as indicated in the Gas Regulation table. (See page 31 for more
details).

The indication of certain functions:
P 1- “Purge in progress” = Deaeration cycle started

Electricity supply

- Check that the voltage and frequency of the electricity supply
correspond to the data shown on the boiler data plate;

- Make sure that the earthing connection is ecient.

menu 2 - Boiler parameters
submenu 3 - parameter 1
Maximum Heating Power adjustment
submenu 2 - parameter 0

Soft light Ignition

submenu 3 - parameter 5
Heating ignition delay

First ignition

1. Make sure that:

-

The gas valve is closed;

- The electrical connection has been properly carried out.
Make sure that, in any case, the green/yellow earthing wire is
connected to an ecient earthing system;

-

Use a screwdriver to lift the cap on the automatic air relief

valve;

-

Switch on the boiler (by pressing the ON/OFF button) and use

the M

ODE button to select the standby mode, where no hot

water or heating requests are made.

-

Start the deaeration cycle by pressing E

SC for 5 seconds

The boiler will start a deaeration cycle lasting about 7 minutes

28

38

24

Checking slow ignition power

The soft light can be adjusted between the maximum power
(shown on the display as “99”, i.e. 100%) and the minimum power
(shown on the display as “1”, i.e. 1%).
T

o check the slow ignition power, access menu 2/sub menu 2/

parameter 0.

gas setting

parameter

24 kW

30 kW

38 kW

G20

G31

G20

G31

G20

G31

lower Wobbe index

(15°C, 1013 mbar) (MJ/m3)

45,67

70,69

45,67

70,69

45,67

70,69

minimum fan speed(%)

233050501010101

maximum central heating fan speed (%)

234858580807070

maximum D.H.W fan speed (%)

232989889898989

gas valve restrictor(ø)

NO

3,80NO4,50NO5,250

gas ow max/min
(15°C, 1013 mbar)

(nat - m3/h) (GPL - kg/h)

max D.H.W

2,65

1,94

3,17

2,33

4,02

2,95

max C.H.

2,33

1,71

2,96

2,17

3,28

2,41

min

0,58

0,43

0,69

0,50

0,79

0,58

Heating ignition delay adjustment

This parameter – menu 2/sub menu 3/parameter 5 - can be used
to manually (0) or automatically (1) set the delay time before the
subsequent reignition of the burner after it has switched o on
reaching the desired temperature in central heating mode.
By selecting manual, it is possible to set the delay in minutes using
the

successive parameter (menu 2/sub menu 3/parameter 6), to a
time between 0 and 7 minutes.
Automatic selection means that the boiler will establish the delay
time based on the set-point temperature

commissioning

29

commissioning

Maximum or mini-

mum CO

2

24 kW

30 kW

38 kW

CO2 (%)

G20

9.0 ± 0.2

9.0 ± 0.2

9.4 ± 0.2

G31

10.7 ± 0.2

10.0 ± 0.2

10.6 ± 0.2

Test function and combustion analysis

The boiler has two pressure taps to measure the combustion gas
t

emperature, the combustive air and the concentrations of O2
and CO2 on the outside of the ue gas header.
to access these pressure taps, unscrew the screw which holds the
blanking cover and its seal together.

Checking the gas setting

To carry out analyses of combustion, the test function must be
activated.

Cleaning function

The PCB allows the appliance to be forced to minimum or
maximum power.
Activate the cleaning function by pressing the Reset button for
5 seconds, the boiler switches to maximum heating power, the
following appears on the display:

Wait for the boiler to stabilise before carrying out the combustion
analyses. Check the CO2 value according to the table below.
Important: do not remove silencer 22

N.B.: when the front combustion chamber panel is open, the
CO2 value drops by 0.3%.

If the values taken dier from the table, adjust the gas valve fol­lowing the procedure described below.

A

djust the CO2 content to ± 0.2 by turning setting screw 50 (2.5

mm allen key)

- tigh

ten to lower the CO2 value

- unscrew to increase the CO2 value
Set the content by turning the screw about a 1/4 of a turn then

ait after each change for approximately 1 minute for the CO2

w
value to stabilise, then repeat.

8

2

50

To select the function at maximum domestic hot water, press
the

button, the following appears on the display :

To select the function at minimum domestic hot water, press
the

button, the following appears on the display :

The function is automatically deactivated after 10 minutes or by
pressing the Reset button.
Note: the appliance can be forced to minimum or maximum
power from menu 7 (see the section on the display - setting ­diagnostics menu).

Maximum gas ow combustion analysis

Activate the test function at the maximum heating power t

--

Only a 2.5 mm allen

key must be used. Do

not use a screwdriver

Minimum gas ow combustion analysis

Activate the cleaning function at minimum power in either
heating or domestic hot water production.

Wait for the boiler to stabilise before carrying out the combustion
analy

ses. Check the CO2 value according to the table above.

Important: do not remove silencer 22

N.B.: when the combustion chamber is open, the CO2 value
drops by 0.3%.

If the values taken dier from the table, adjust the gas valve fol­lowing the procedure described below.

T

o adjust the CO2 value, remove cap 2,

adjust the CO2 content to

± 0.2 by turning setting screw 51 (4 mm allen key)

- unscr

ew to lower the CO2 value

- tighten to increase the CO2 value

51

Only a 4 mm

allen key must be

used. Do not use a

screwdriver

Set the content by turning the screw about a 1/4 of a turn then
w

ait after each change for approximately 1 minute for the CO2
value to stabilise, then repeat.
Once the settings and analyses are complete, exit test mode, and
reposition the blanking cover and its seal correctly.

30

AUTO function

This is a function which enables the boiler to automatically adapt
its operation routine (the temperature of the heating elements) in
line with the outdoor conditions, in order to achieve and maintain
the requested room temperature conditions.
Depending on the peripheral units connected and the number
of zones controlled, the boiler adjusts its ow temperature
automatically.
The various corresponding parameters should therefore be set
(see adjustments menu).
To activate the function, press the A

UTO button.

commissioning

Example 1:

S

INGLE ZONE SYSTEM (HIGH-TEMPERATURE) WITH ON/OFF ROOM THERMOSTAT:

In this case the following parameters must be set:
4

21 - Activation of temperature adjustment using sensors

- Select 1 = Basic temperature adjustment
2 44 - Boost Time (optional)
The wait time for the ow temperature increase in steps of

4°C may be set. The value varies according to the type of
system and installation.

I

f the Boost Time value = 00 the function is not activated.

Example 2:

INGLE ZONE SYSTEM (HIGH-TEMPERATURE) WITH ON/OFF ROOM THERMOSTAT +

S

OUTDOOR SENSOR:

In this case the following parameters must be set:
4

21 - Activation of temperature adjustment using sensors

- Select 3 = outdoor sensor only
4 22 -

Temperature adjustment curve selection

- Select the relevant curve according to the type of
system, installation, heat insulation used in the building,
etc.

4

23 - Perform a parallel curve shift if necessary, increasing or

decreasing the set-point temperature (this may also be
modied by the user, using the heating temperature
adjustment knob, which, with the Auto function
activated, is used to shift the curve in a parallel manner).

Example 3:

S

INGLE ZONE SYSTEM (HIGH-TEMPERATURE) WITH REMOCON REMOTE CONTROL +

OUTDOOR SENSOR

In this case the following parameters must be set:
4 21 - Activation of temperature adjustment using sensors

- select 4 = outdoor sensor + room sensor
4 22 -

Temperature adjustment curve selection

- Select the relevant curve according to the type of
system, installation, heat insulation used in the building,
etc

4

23 - Perform a parallel curve shift if necessary, increasing or

decreasing the set-point temperature. (This may also be
changed by the user by the encoder which, with the Auto
function activated, is used to shift the curve in a parallel
manner.)

4

24 - Inuence of room sensor

- used to adjust the inuence the room temperature has
on the calculation of the set-point ow temperature (20 =
maximum, 0 = minimum).

Note: See page 35 for details on accessing menus.

31

boiler protection devices

Central Heating circuit

Display

Description

1 01

Overheat

1 02

Pressure Sens Error

1 03

Insucient circulation

1 04

1 05

1 06

1 07

1 10

C.H. Flow temp. probe circuit open / short circuit

1 08

Insucient water (request lling)

1 12

C.H. Return temp. probe circuit open / short circuit

1 14

External sensor circuit open / short circuit

1 16

Floor Thermostat contact open

1 18

Heating delevery probe problem

1 P1

Insucient circulation indication

1 P2

1 P3

D.H.W. circuit

2 01

D.H.W. temp. probe circuit open / short circuit

2 02

Bottom storage temperature probe open / short circuit

Solar kit

(optional)

2 04

Solar collector temperature probe open / short circuit

2 07

Solar collector overheating

2 08

Collector frost protection temperature

Internal P.C.B.’s

3 01

EEPROM error

3 02

Comunication error

3 03

Main P.C.B. error

3 04

Too many (> 5) resets in 15 minutes

3 05

Main P.C.B. error

3 06

Main P.C.B. error

3 07

Main P.C.B. error

External P.C.B.’s

4 07

Room sensor circuit open 7 short circuit

Ignition and Detecion

5 01

No ame detected

5 02

Flame detected with gas valve closed

5 04

Flame lift

5 P1

1st Ignition Failed

5 P2

2nd Ignition Failed

5 P3

Flame cut-o

Air Inlet / Flue gas outlet

6 04

Insucient fan speed

6 10

Thermofuse open

Multi-zone Heating (Heating Zone Modules - optional)

7 01

Zone 2 outgoing sensor defective

7 02

Zone 2 return sensor defective

7 03

Zone 3 outgoing sensor defective

7 04

Zone 3 return sensor defective

7 05

Hydraulic separation sensor defective

7 06

Zone 2 overheating

7 07

Zone 3 overheating

Boiler protection devices

The boiler is protected from malfunctioning by means of internal checks
performed by the electronic microprocessor P.C.B., which stops the boiler
from operating if necessary.
In the event of the boiler being shut o in this manner, a code appears on
the display which refers to the type of shut-o and the reason behind it.
There are two types of shut-o:

Safety shut-o

This type of error is “volatile”, which means that the boiler starts up again
automatically as soon as the problem which caused the shut-o is re­moved; the error is indicated by the «Err» symbol which appears on the
display and the error code.
In fact, soon as the cause of the shut-o disappears, the boiler starts up
again and continues to operate normally.
In the event of error 1 08 - Shut-o due to insucient water pressure
inside the heating circuit - the boiler will perform a safety shut-o.
You can increase the pressure by lling the heating circuit.
In this case or if the re-balancing request is performed on a frequent basis,
switch the boiler o, turn the external electric switch to the OFF position,
shut o the gas cock and contact a qualied technician to check for any
leaks of water.

Shutdown

This type of error is “non-volatile”, which means that it is not removed
automatically. To restore normal operation press the
control panel.
The rst gure of the error code (e.g. 1 01) indicates within which
operational assembly the error occurred.
1 - Primary Circuit
2 - Domestic Hot Water Circuit
3 - Internal Electronic Part
4 - External Electronic Part
5 - Ignition and Detection
6 - Air inlet - ue gas outlet

Malfunction warning

This warning is shown by the display in the following format:
5 P1 = FIRST IGNITION ATTEMPT UNSUCCESSFUL
the rst gure indicating the operational assembly is followed by a P
(warning) and the code relating to the specic warning.

Important

If this shutdown occurs frequently, contact an authorised Technical Service
Centre for assistance. For safety reasons, the boiler will permit a maximum
of 5 resets in 15 minutes (5 presses of the RESET button); at the 6th attempt
within this 15-minute period the boiler will shut down and may only be
operated again after the electricity supply has been disconnected. If the
shutdown is occasional or an isolated event, this is not a problem.

button on the

Table summarising error codes

Anti-frost Device.

The anti-frost function acts on the central heating ow temperature pro­be, independently from other regulations, when the electrical supply is
turned on.
If the primary circuit temperature is between 3°C and 8°C the
pump will run (with the diverter valve switching between cen­tral heating and hot water every 1 minute) until the temperature
reaches > 9°C.
If the ow temperature remains between 3°C and 8°C the pump will con­tinue

to run for a maximum of 20 minutes unless a temperature above >
9°C is detected in the central heating ow, after this the the burner will re
(heating position) until a temperature of > 30°C is detected.
If the central heating ow temperature is < 3°C, the burner will re (hea­ting position) at minimum power until the temperature reaches > 30°C,
the burner will go out.
If lockout is caused by overheat the burner will not re but the pump will
continue to run (heating position).
The anti-frost device activates only when (with the boiler operating cor­rectly):

- the system pressure is correct;

- the boiler is electrically powered;

- there is a supply of gas.

32

settings - adjustment - problem identication menus

Accessing the settings - adjustment - problem identication
menus

The boiler can be used to manage the heating and domestic hot
water production system in its entirety.
Navigation within the menus enables the boiler system +
connected peripheral units to be customised, optimising
operation for maximum comfort and maximum saving. It also
provides important information relating to the ecient operation

of the boiler.

The following menus are available:

2 Boiler Parameter

2 1 Service code (accesso riservato tecnico qualicato)

2 2 General setting

2 3 C.H. Parameters - Part 1

2 4 C.H. Parameters - Part 1

2 5 Domestic Hot Water

2 9 Menù 2 Reset to factory setting

3 Solar & Storage

3 0 General setting

3 1 Service code (accesso riservato tecnico qualicato)

3 2 Special setting

4 Zone 1 Parameters

4 0 Set-point Zone1

4 1 Service code (accesso riservato tecnico qualicato)

4 2 Zone 1 Setting

4 3 Diagnostics

4 4 Zone device mangement

5 Zone 2 Parameters

5 0 Set-point Zone2

5 1 Service code (accesso riservato tecnico qualicato)

5 2 Zone 2 Setting

5 3 Diagnostics

5 4 Zone device mangement

5 5 Multizone

7 Test & Utilities

8 Service Parameter

8 1 Service code (accesso riservato tecnico qualicato)

8 2 Boiler

8 3 Boiler Temperature

8 4 Solar & Storage

8 5 Service

8 6 Statistics

8 7 E@sy - NOT ACTIVE

8 8 Error History

The parameters relating to each individual menu are listed in the
following pages.
The various parameters can be accessed and modied using th

M

ENU/OK button and programmation buttons

below).

and . (see g.

PROGRAMMATION
button

Menu/Ok­button

To access the Menus, open the cover and proceed as follows:

1. Press the MENU/OK button; the rst gure 000 will ash on the

display.

2. Press the

“200

3. Press the MENU/OK button; the second gures on the display will

ash, e.g. “210.

Caution! The menus reserved for qualied technicians may only be

accessed after setting the access code.

4. Press the MENU/OK button; 222 will appear on the display unit.

5. Press the

6. Press the MENU/OK button to select the sub menu; the second

gures will ash, e.g. “220”.

7. Press the

“230

8. Press the MENU/OK button to access the sub menu parameters; the

three gures will ash, for example: “230”.

9. Press the

“231

10. Press the MENU/OK button to access the parameter; the display will

indicate the value, e.g “70”.

Note: The parameter value will be displayed for 20 seconds, then

will begin to ash in alternation with the parameter, e.g. “70 >

231.

11. Press the

12. Press MENU/OK to save the change or press ESC to exit without
saving.

To exit, press the ESC button until the normal display screen is
restored.
For menus which do not require the access code, it is possible to pass
directly from the menu to the sub menu.

buttons

buttons

buttons

buttons

buttons

or to select a menu, for example:

or to select code 234

or to select a sub menu; for example:

or to select a parameter; for example:

or to select the new value, e.g. “75”.

33

settings - adjustment - problem identication menus

menu

sub-menu

parameter

description value
2 BOILER PARAMETER SETTING
2 1 Entering access code 222 press the programming "+" button t

default setting

and press the M

ENU button

o select 234

2 2 B

2 2 0 Slow ignition 0 to 99 60

2 2 1 Minimum ambient temperature for

2 2 2 NOT PRESENT

2 2 3 Under

2 2 4 Mechanical timer connection authorisation 0 = Absent

2 2 5 Heating ignition delay 0 = Deactivated

2 2 6 NOT PRESENT

2 2 7 NOT PRESENT
2 2 8 Boiler Version

2 3 B

2 3 0 NOT PRESENT

2 3 1 Maximum heating power setting 0 to 99 see the "gas setting" table, information on

2 3 2 Domestic hot water maximum RPM

2 3 3 Minimum RPM percentage

2 3 4 Heating maximum RPM percentage

2 3 5 Selection of ignition delay type when

2 3 6 Ignition delay when heating timer setting from 0 to 7 minutes 3

OILER GENERAL SETTING

antifreeze activation

oor thermostat or zone 2 ambient

thermostat selection

CANNOT BE MODIFIED

OILER PARAMETER  PART 1

percentage

CANNOT BE MODIFIED

CANNOT BE MODIFIED

CANNOT BE MODIFIED

heating

RESERVED FOR SAT

om 2 to 10 °C 5 Activated

fr

0 = Floor safety thermostat
1 = Zone 2 ambient thermostat

1 = Present

1 = 10 seconds
2

= 90 seconds

3 = 210 seconds

0 to 5 0 RESERVED FOR TECHNICAL ASSISTANCE Only if

0 to 99 RESERVED FOR TECHNICAL ASSISTANCE Only if

0 to 99

0 to 99

0 = Manual
1 = automatic

device (optional)

0

0 to be modied if mechanical timer is present

(optional)

0 A

the PCB is changed

Starting

the gas or PCB is changed

see "gas setting" table

1 see section on "gas setting"

only with the modulating peripheral

ctivated only with zone 2 interface (optional)

2 3 7 Post-circulation when heating from 0 to 15 minutes or OC (AC) 3

2 3 8 Circulation pump operating type

2 3 9 Setting

the Delta T

Circulation pump

These parameters allow the ow and backow temperature dierence to be set, which determines whether the circulation

pump switches from low to high speed

E.g.: par

low speed. The minimum waiting time for changing speed is 5 minutes.

modulation

am. 239 = 20 and ∆T > 20°C- the circulation pump runs at high speed. If ∆T < 20 - 2°C the circulation pump runs at

0 = Low Speed
1 = High Speed

= Modulating

2

from 10 to 30 °C 20 to be set with operation of the circulation pump

34

2

in modulating mode

settings - adjustment - problem identication menus

menu

sub-menu

parameter

description value
2 4 BOILER PARAMETER  PART 2
2 4 0
2 4 1 NOT PRESENT
2 4 2 NOT PRESENT
2 4 3 Post-ventilation after heating request 0 = OFF

2 4 4 Time delay after heating temperature increase from 0 to 60 minutes 16 activated only with thermostat On/O and

2 4 5 NOT PRESENT
2 4 6 NOT PRESENT

2 4 7 Device indicator for heating circuit pressure 0 = temperature sensor only

2 4 8 NOT PRESENT

2 5 D
2 5 0 COMFORT function 0 = deactivated

2 5 2 Hot water ow delay from 5 to 200 (0.5 to 20

2 5 3 Extinction of the burner in domestic hot water 0 = anti-scale (stop at > 67°C)

2 5 4 Post-circulation and post-ventilation after a

2 5 5 Domestic hot water timer from 0 to 60 minutes 0

NOT PRESENT

1 = ON

This parameter allows the time delay to be set before automatic increase of the ow temperature calculated in increments of 4°C (max 12°C). If this

parameter retains the value 00, this function is not active.

1 = pressure switch at mini­mum
2

= pressure sensor

OMESTIC HOT WATER PARAMETER

1 = timed
2 = always on

The appliance allows the hot water heating comfort to be increased via the “COMFORT” function.

This function keeps the secondary exchanger temperature stable when the boiler is not in use. When the function is active,

the display shows COMFORT

Note: this function can be activated and deactivated by pressing the COMFORT button

seconds)

1 = + 4°C /setting

domestic hot water draw-o

0 = OFF
1 = ON

OFF = 3 minutes post-circulation and post-ventilation after
draw-o

if the boiler temperature measured requires it.

ON =

always on

hot water draw-o

for 3 minutes post-circulation and post-ventilation after

.

default setting

0

ting control activated (parameter 421 or 521

hea
= 01

1 RESERVED FOR TECHNICAL ASSISTANCE Only if the

PCB is changed

0 Timer = activated for 30 minutes after domestic

hot water draw-o

5 Anti "water hammering"

0

0

domestic hot water

domestic

2 9 RESET MENU 2
2 9 0 Automatically resetting to the default setting in

menu

2

Reset
OK = yes
ESC = no

To reset all default parameter settings, press the
MENU button

35

settings - adjustment - problem identication menus

menu

sub-menu

Parameter

Description value
3 BOILER WITH TANK INTERNAL OR EXTERNAL AND SOLAR APPLIANCE CONNECTION
3 0 GENERAL SETTING

3 0 0 NOT ACTIVATED
3 0 1 NOT ACTIVATED
3 0 2 NOT ACTIVATED

3 1 Entering access code 222 T

3 2 SPECIAL SETTING
3 2 0 Anti-legionella function 0=OFF - 1 = ON

This function avoids the formation of the legionella bacterium wich sometimes develops in pipes and water tanks where the temperature is

included

is light aan and the storage water is warmed up to 65°C during 30 minutes.

3 2 1 NOT ACTIVATED
3 2 2 NOT ACTIVATED

3 2 3 Collector delta temp pump ON from 0 to 30°C 8
3 2 4 Collector delta temp pump OFF from 0 to 30°C 2
3 2 5 Minimum collector temp pump ON from 10 to 90°C 30
2 2 6 Collector kick ON or OFF OFF
3 2 7 Recooling function ON or OFF OFF

3 2 8 NOT ACTIVATED

3 2 9 Collector frost protection temperature fr

between 20 and 40°C. If the storage temperature remains more than 100 hours less than 59°C and the function is enable, the boiler

om -20 to +5°C -20

default setting

urn the encoder clockwise to select 234 and

press the M

Enable only with Clip-In solar connected
(option)

ENU button

36

settings - adjustment - problem identication menus

temperatura di mandata all’impianto

bassa tempertaura alta tempertaura

temperatura esterna

valore di consegna

temperatura ambiente

°C

20

25

15

30

40

50

60

70

80

90

100°C

10

2.5 3.0 3.5 2.0

1.5

1.2

1.0

0.8

0.6

0.4

0.2

5 0 -5 -10 -15 -20 °C

menu

sub-menu

parameter

description value
4 ZONE 1 PARAMETER
4 0 ZONE 1 TEMPERATURE SETTING

4 0 0 Zone 1 comfort temperature setting

from 10 to 30 °C 19 Activated only with the modulating device con-

"Comfort ambience T"

4 0 1 Zone 1 reduced temperature setting

from 10 to 30 °C 16

"Reduced ambience T"

4 0 2 Heating xed temperature setting

fr

om 20 to 82 °C 70 Activated only with temperature control and xed

"Heating xed temp"

4 1 Entering access code 222 turn the encoder clockwise t

4 2 ZONE 1 SETTING

4 2 0 Heating appliance temperature value

setting

om 20 to 45°C (low

0 = fr
temperature)
1 = from 35 to 85°C (high
temperature)

4 2 1 Basic heating control type selection type

depending on the peripheral devices

connected

0 = xed ow temperature
1 = device On/O
2 = ambient sensor only
3 = external sensor only
4 = ambient sensor + external
sensor

4 2 2 Slope 0_2 to 3_5 1_5

If the external sensor is used, the boiler

calculates the most suitable heating ow

temperature taking the external temperature

and the type of appliance into account.

The type of curve must be chosen according

to the type of appliance radiator and the

heat losses present in the building.

default setting

nected (option)

temperature

press the MENU/OK button

1 select in the appliance type base

1 To activate heating control, press the AUTO button.

The display lights up the AUTO symbol, indicating
the peripheral device connected (if present)

o select 234 and

High temperature

4 2 3 Parallel shift - 20 to + 20 0

4 2 4 Compensation 0 t

4 2 5 Zone 1 heating maximum temperature

4 2 6 Zone 1 heating minimum temperature

4 3 DIAGNOSTICS display only
4 3 0
4 3 1
4 3 2

4 3 3

4 4 ZONE DEVICE MANAGEMENT
4 4 0

Flow Temperature

Ambiente temperature

setting value

External temperature

low temperature

To adapt the thermal curve to the appliance requirements, it is possible to perform a parallel shift of the curve in order to alter the calculated

ow temperature and therefore the ambient temperature.

T

he shift value between - 20 and + 20 is shown on the display. Each level corresponds to a 1°C increase in the ow temperature in relation

to the initial setting.

o + 20 20

if setting = 0, the temperature taken from the ambient sensor does not aect the calculation of
the setting. If setting = 20, the temperature taken has maximum inuence on the setting.

35 t

setting

setting

Zone 1 room temperature

Zone 1 set temperature

Zone 1 heat request

Pump status

Pump control

Activated only with the modulating device con-

o + 82°C 82 if parameter 420 = 1

20 to + 45°C 45 if parameter 420 = 0

o + 82°C 35 if parameter 420 = 1

35 t

20 to + 45°C 20 if parameter 420 = 0

nected (option)

0=OFF
1=ON

0=OFF

Active only with MGZ/MCM kit

1=ON

0=OFF

Active only with MGZ/MCM kit

1=ON

37

settings - adjustment - problem identication menus

menu

sub-menu

parameter

description value

5 ZONE 2 PARAMETER

ZONE 2 TEMPERATURE SETTING

5 0

5 0 0 Zone 2 comfort temperature setting

from 10 to 30 °C 19 Activated only with the modulating device connected

"Comfort ambience T"

5 0 1 Zone 2 reduced temperature setting

from 10 to 30 °C 16

"Reduced ambience T"

5 0 2 Heating xed temperature setting

from 20 to 82 °C 70 Activated only with temperature control and xed

"Heating xed temp"

5 1 Entering access code 222 turn the encoder clockwise to select 234 and press

5 2 ZONE 2 SETTING
5 2 0 Heating appliance temperature value

setting

0 = fr

om 20 to 45°C (low
temperature)
1 = from 35 to 85°C (high
temperature)

5 2 1 Basic heating control type selection type

depending on the peripheral devices
connected

0 = xed ow temperature
1 = device On/O

= ambient sensor only

2
3 = external sensor only
4 = ambient sensor + external
sensor

5 2 2 Slope 0_

2 to 3_5 1_5

If the external sensor is used, the boiler calculates the most suitable heating ow
temperature taking the external temperature and the type of appliance into
account.
The type of curve must be chosen according to the type of appliance radiator and the
heat losses present in the building.

5 2 3 Parallel shift -

20 to + 20 0

To adapt the thermal curve to the appliance requirements, it is possible to perform a parallel shift of the curve in order to alter the calculated
ow temperature and therefore the ambient temperature.

he shift value between - 20 and + 20 is shown on the display. Each level corresponds to a 1°C increase in the ow temperature in relation to

T
the initial setting.

5 2 4 Compensation 0 to + 20 20

if setting = 0, the temperature taken from the ambient sensor does not aect the calculation of the

. If setting = 20, the temperature taken has maximum inuence on the setting.

setting

5 2 5 Z

5 2 6 Z

one 2 heating maximum temperature

setting

one 2 heating minimum temperature

setting

35 to + 82°C 82 if parameter 420 = 1
20 to + 45°C 45 if parameter 420 = 0
35 to + 82°C 35 if parameter 420 = 1
20 to + 45°C 20 if parameter 420 = 0

5 3 DIAGNOSTICS
5 3 0

5 3 1
5 3 2
5 3 3
5 3 4

Zone 2 room temperature

Heating ow outlet temperature
Heating return temperature
Zone 2 set temperature
Zone 2 heat request

Activated only with the modulating device connected

0=OFF
1=ON

5 3 5

Zone 2 Pump status

0=OFF
1=ON

5 4 ZONE DEVICE MANAGEMENT
5 4 0

Operation mode test

0=OFF
1=ON
2=manual

5 4 1

Valve control

0=OFF
1=Open
2=Close

5 4 2

Pump control

0=OFF
1=ON

5 5 MULTIZONE
5 5 0
5 5 1

Heating collector temperature
Heating collector ow outlet

temperature oset

0 to 120°C 0 Active only with MGZ/MCM kit
0 to + 40°C 5

default setting

(option)

temperature

the MENU/OK button

1 select in the appliance type base

0 To activate heating control, press the AUTO button.

The display lights up the AUTO symbol, indicating the
peripheral device connected (if present)

see graph on the previous page

(option)
Active only with MGZ/MCM kit

Active only with MGZ/MCM kit

Active only with MGZ/MCM kit

38

settings - adjustment - problem identication menus

menu

sub-menu

parameter

description value
7 TEST & UTILITIES
7 0 0 Function test - Cleaning

7 0 1 Bleed cycle press Menu

8 PARAMETER FOR TECHNICAL ASSISTANCE
8 1 Entering access code 222

8 2 BOILER

8 2 0 NOT PRESENT

8 2 1 Fan status ON or OFF

8 2 2 Fan speed (x100) rpm

8 2 3 Circulation pump speed OFF - LS - HS

8 2 4 Distribution valve position Domestic hot water - Heating

8 2 5 Water ow rate (l/min)

8 2 6 NOT PRESENT

8 3 BOILER TEMPERATURE

8 3 0 Heating adjustment temperature (°C)

8 3 1 Heating ow temperature (in °C)

8 3 2 Heating backow temperature (in °C)

8 3 3 Domestic hot water temperature (in °C)

8 4 SOLAR APPLIANCE AND TANK

8 4 0 Accumulated measured temperature

8 4 1 Solar collector temperature

8 4 2 Solar appliance water input temperature

8 4 3 Solar appliance low tank sensor temperature

8 4 4 Layered tank set temperature

8 4 5 Total circulation pump operating time delay for solar appliance

8 4 6 Total solar collector overheating time delay

8 5 SERVICE - TECHNICAL ASSISTANCE

8 5 0 NOT PRESENT

8 5 1

8 5 2 NOT PRESENT

8 5 3 NOT PRESENT

8 5 4 PCB hardware version

8 5 5 PCB software version

8 5 6 PUS peripheral device interface software version

turn the encoder to select the operating

mode

NOT PRESENT

t-- = funct. at Max heating
power

--

t

= funct. at Max DHW power

t

= funct. at Min power

--

t-- activation can also be obtained by pressing the Reset

default setting

button for 10 seconds. The function is deactivated after
10 minutes or by pressing Esc

turn the encoder clockwise t
MENU button

activated only with the solar kit connected or external
tank

o select 234 and press the

39

settings - adjustment - problem identication menus

menu

sub-menu

Parameter

Description value

8 6 STATISTICS

8 6 0 Number of hours burner operating in heater mode (xxh/10)

8 6 1 Number of hours burner operating in hot water mode (xxh/10)

8 6 2 Number of ame separations (nr/10)

8 6 3 Number of ignition cycles (nr/10)

8 6 4 Number of lling cycles performed

8 6 5 Average length of heating request (minutes)

8 7 E@SY HOTLINE NOT ACTIVE

8 7 0

8 7 1

8 8 ERROR LIST

8 8 0 10 last errors from E00 to E99

This parameter allows the last 10 boiler errors agged to be displayed, indicating the day, month and year.
When the parameter is accessed, the errors are displayed listed from E00 to E99.
For each error, the following sequence is displayed:
E00 - error number
108 - error code
A15 - A = day on which error E00 occurred - Only with the CLIMA MANAGER control unit connected (optional)
B09 - B = month during which error E00 occurred - Only with the CLIMA MANAGER control unit connected (optional)
C06 - C = year during which error E00 occurred - Only with the CLIMA MANAGER control unit connected (optional)

default setting

8 8 1 Error list reset

8 9 DATA - ASSISTANCE CENTRE

8 9 0 Enter the name of the assistance centre - it will be displayed if there is a fault which cannot be unlocked with the Reset button

"Assistance Centre Name" appears on the display,
insert each letter, press the MODE button to conrm it and move on to the next letter.
Enter the number of the assistance centre - it will be displayed if there is a fault which cannot be unlocked with the Reset button
"Assistance Centre Number" appears on the display,
To insert each digit, press the MODE button to conrm it and move on to the next digit.
Press the Menu button to conrm.

Reset
OK = yes
ESC = no

press the MENU button and start entering the letters by turning the encoder. To

press the MENU button and start entering the digits by turning the encoder.

40

maintenance

Important

Maintenance is an essential part of the safe and ecient operation
of the boiler and ensures its durability. It should be performed
according to the instructions given in current legislation. Perform
combustion analysis regularly in order to check the operating
eciency of the boiler and to make sure any polluting substances
relased are within the boudaries set by current legislation.
Before beginning maintenance work:

-

Disconnect the appliance from the electricity supply by

turning the external bipolar switch to the “OFF” position;

-

Close the gas valve and the central heating and domestic hot

water system valve.
After the work has been completed the initial settings will be
restored.

General comments

It is recommended that the following inspections be carried out
on the boiler at least once a year:
1

. Check the seals in the water part and, if necessary, replace the

gaskets and restore the seal to perfect working order.

2

. Check the seals in the gas part and, if necessary, replace the

gaskets and restore the seal to perfect working order.

3.

Visually check the overall condition of the boiler.

4. Visually check the combustion and, if necessary, disassemble

and clean the burner.

Following the inspection detailed in point “3”, disassemble

5.

and clean the combustion chamber, if necessary.

6.

Following the inspection detailed in point “4”, disassemble

and clean the burner and injector, if necessary.

7.

Cleaning the primary heat exchanger

8. Make sure the following heating safety devices are operating

correctly:

emperature limit safety device.

- t

9. Make sure that the following gas part safety devices are

operating correctly:

- absenc

10. Check the eciency of the domestic hot water production

process (test the ow rate and temperature).

Perform a general inspection of the boiler operation.

11.

12. Remove oxide from the detection electrode using an emery

cloth.

These checks are not exhaustive. Further mechanical, electrical

13.

and combustion maintenance checks may be required.

Operational test

After having carried out the maintenance operations, ll the
heating circuit at a pressure of approximately 1.0 bar and release
the air from the system.
Fill the domestic hot water system at the same time.

-

Begin operating the boiler.

- If necessary, release the air from the heating system again.

- Check the settings and make sure all the command, adjustment

and monitoring parts are working correctly.

Check the ue system is sealed and operating correxctly.

-

e of gas or ame safety device (ionisation).

Draining procedures

The heating system must be drained using the following

procedure:

-

Switch o the boiler, make sure the external bipolar switch is in

the OFF position and shut o the gas valve;

-

Loosen the automatic air relief valve;

- Open the system drain o cock and collect the escaping water
in a container;

Empty the water from the lowest points of the system (where

­applicable).

If the system is to be left inactive in areas where the room
temperature may fall below 0°C during winter, we recommend
that anti-freeze liquid is added to the water in the heating system
in order to avoid the need for repeated draining; when this liquid
is used make sure it is compatible with the stainless steel used for
the bodywork of the boiler.
We recommend the use of anti-freeze products which contain
PROPYLENE GLYCOLS as these inhibit corrosion and that they
are used in conjunction with the anti-scaling and anti-corrosion
function, in the quantities suggested by the manufacturer, at the
mimimum temperature.
Regularly check the pH level of the water/anti-freeze mix in the
boiler circuit and replace it when the value measured is lower than
the limit prescribed by the manufacturer.

DO NOT MIX DIFFERENT TYPES OF ANTI-FREEZE.

The manufacturer will not be held liable for any damage caused
by the appliance or the system due to the use of inappropriate
anti-freeze substances or additives.

Draining the domestic hot water system and indirect cylinder

Every time there is a danger of freezing, the domestic hot water
system must be drained as follows:

-

Shut o the water mains inlet valve;

- Open all the hot and cold water taps;

- Empty the water from the lowest points of the system (where

applicable).

WARNING

Before handling, empty all components which may contain hot
water, performing bleeding where necessary.
Descale the components in accordance with the instructions
provided on the safety data leaet supplied with the product used,
make sure the room is well ventilated, wear protective clothing,
avoid mixing dierent products, and protect the appliance and
surrounding objects.
Seal all openings used to take a gas pressure reading or to make
any gas adjustments.
Make sure that the nozzle is compatible with the supplied gas.
If a smell of burning is detected or smoke is seen leaking from
the appliance, or there is a smell of gas, disconnect it from the
electricity supply, shut o the gas valve, open the windows and
call for technical assistance.

41

MAINTENANCE GUIDE

GENERAL ACCESS

Tools

Time

3 min

1

Unclip the cover to remove Remove the two screws Remove the front panel

2

Lower the electrical box

Remove the combustion
chamber front panel by
releasing the clips

1. GENERAL ACCESS

42

2. ELECTRICAL UNIT

2.1 CONTROL BOX ACCESS

CONTROL BOX ACCESS

Tools

Time

4 min

1

Remove the front panel as above

and pivot the electrical box

Remove the two screws and
unlock the four clamps to gain
access to the control box

2.2 FUSE

FUSE

Tools

Time

5 min

1

Open the control box as above Remove the fuse

MAINTENANCE GUIDE

43

MAINTENANCE GUIDE

2.3 MAIN PCB

MAIN PCB

Tools

Time

7 min

1

After opening the control box,

disconnect the electrical plug

connectors

Unscrew the two screws and
remove the PCB

2.4 DISPLAY PCB

DISPLAY PCB

Tools Time

7 min

1

Unclip the cover to remove

Lower the door and remove the
two control knobs

Unscrew the four screws and
pull the assembly towards you

2

Disconnect the electrical plug

connectors, unlock the four

clamps, and remove the PCB

44

3. HYDRAULIC UNIT

3.1 RIGHT HAND HYDRAULIC BLOCK ASSEMBLY

LEGEND

1. Diverter valve motor

2. Diverter valve

3. Auto air vent

4. Primary water pressure switch

5. Pump

6. Central heating filter

7. Not applicable in UK

8. Non-return valve

9. Non-return valve assembly

10. DHW flow switch assembly

11. Central heating return

12. Cold water inlet (DHW)

13. Central heating drain valve

3.2 3 WAY VALVE

3 WAY VALVE UNIT

Tools Time

5 min

1

Unplug the diverter valve cable

Remove the clip and lift the motor from the

diverter valve body

2

Drain the boiler (see 3.3). Remove the clip and

lift the diverter valve from the assembly

When reassembling, ensure the diverter valve is

aligned correctly

MAINTENANCE GUIDE

45

MAINTENANCE GUIDE

3.3 DRAINING

DRAINING

Tools

Time

5 min

1

Turn the drain valve anti-clockwise to open and drain the water
from the boiler.

3.4 AUTOMATIC AIR VENT

AUTOMATIC AIR VENT

Tools

Time

5 min

1

Drain boiler (see 3.3). Remove the clip and lift the AAV from the

assembly

3.5 PRIMARY WATER PRESSURE SENSOR

PRIMARY WATER PRESSURE SENSOR

Tools

Time

5 min

1

Drain boiler (see 3.3). Remove the fixing clip, unplug the

electrical connector and lift the sensor from the assembly

46

MAINTENANCE GUIDE

3.6 PUMP

PUMP

Tools

Time

10 min

1

Drain boiler (see 3.3). Remove

the clip and the two screws

Disconnect the pipe and then

move the pump to the right

disengage

Remove the pump

2

Remove the sensor (see 3.5) Remove the AAV (see 3.4)

3.7 CH FILTER

CH FILTER

Tools

Time

5 min

1

Drain boiler (see 3.3)

Remove the clip

Remove the filter

47

MAINTENANCE GUIDE

3.8 DHW FLOW SWITCH ASSEMBLY

DHW FLOW SWITCH ASSEMBLY

Tools

Time

5 min

1

Drain boiler (see 3.3). Remove the clip and pull the

flow switch assembly towards you

Twist the flow switch assembly to disengage

3.9 LEFT HAND HYDRAULIC BLOCK ASSEMBLY

1. DHW temperature sensor 4. Safety valve

2. Left hand hydraulic block 5. Central heating flow

3. By-pass assembly 6. Domestic hot water outlet

48

MAINTENANCE GUIDE

3.10 DHW TEMPERATURE SENSOR

DHW TEMPERATURE SENSOR

Tools Time

5 min

1

Isolate the cold water supply

and drain the DHW circuit.

Unplug the DHW sensor and

remove the clip

Sensor without wire and clip

Lift the sensor from

the assembly

3.11 SECONDARY HEAT EXCHANGER

SECONDARY HEAT EXCHANGER

Tools

Time

10 min

1

Drain primary and domestic hot water circuits. Remove the two

screws and remove the heat exchanger

49

MAINTENANCE GUIDE

3.12 CONDENSE TRAP

CONDENSE TRAP

Tools Time

5 min

1

Unscrew the condense trap from the condense

body

3.13 SAFETY VALVE

SAFETY VALVE

Tools

Time

5 min

1

Drain boiler (see 3.3). Disconnect the

discharge pipe

Remove the first clip on the left and

pull the safety valve towards you

50

MAINTENANCE GUIDE

3.14 BY-PASS ASSEMBLY

BY-PASS ASSEMBLY

Tools

Time

5 min

1

Drain boiler (see 3.3). Remove the

second clip and pull the assembly

toward you

Push on the by-pass to disengage it

3.15 TEMPERATURE SENSORS & OVERHEAT THERMOSTAT

TEMPERATURE SENSORS & OVERHEAT THERMOSTAT

Tools

Time

5 min

1

OT : White wires Remove the clip and the

temperature sensor or

overheat thermostat together

NTC1 : Black wires
NTC2 : Grey wires

Unplug the electrical

connectors

IMPORTANT!!!!Do not use conducting paste for the contact sensors because it will alter the resistance value.

TEMPERATURE (°C) RESISTANCE (kOmh)

0 27
10 17
20 12
25 10
30 8
40 5
50 4

51

MAINTENANCE GUIDE

3.17 MAIN HEAT EXCHANGER

MAIN HEAT EXCHANGER

Tools

Time

20 min

1

Drain boiler (see 3.3). Remove
the four clips and disconnect the
two pipes between the
exchanger and pump and
between the exchanger and left
hand hydraulic block

Isolate the gas supply. Remove

the four screws and disconnect

the gas pipe from the gas valve

Remove the four screws to free

the heat exchanger

2

Pull the heat exchanger towards

you

Remove the clip and lift the

manual air vent

Twist the thermal fuse to

remove

3.16 MANUAL AIR VENT

MANUAL AIR VENT

Tools

5 min

Time

1

Drain boiler (see 3.3)

Remove the clip and lift the manual air vent from the exchanger

52

4 BURNER UNIT

LEGEND

1. Burner 6. Gas valve

2. Fan 7. Mixing tube

3. Silencer 8. Detection electrode

4. Gas inlet 9. Ignition electrode

5. Air inlet 10. Spark generator

MAINTENANCE GUIDE

53

MAINTENANCE GUIDE

4.1 SPARK GENERATOR

4.2 ELECTRODES

SPARK GENERATOR

Tools

5 min

Time

1

Unplug the ignition electrode from

the spark generator

Remove the screw and the

spark generator

ELECTRODES

Tools

5 min

Time

1

Unplug the electrodes

Remove the screws and pull the

electrodes towards you.

4. BURNER UNIT

54

4.3 BURNER

BURNER

Tools

15 min

Time

1

Remove the silencer

Isolate the gas supply. Remove the

four screws and disconnect the

gas pipe from the gas valve

Pull the assembly towards

you

2

Pull the burner toward you

Remove the three screws to free

the burner door

Replace any gaskets that are damaged or showing signs of

deterioration

1. Stainless Steel Burner

1

3

2

2. Ignition electrode

Power Length Venturi

24 KW 104.6 mm Ø 42 mm
30 KW 135.8 mm /
38 KW 167 mm

3. Detection electrode

/

MAINTENANCE GUIDE

55

MAINTENANCE GUIDE

4.4 FAN

FAN

Tools

Time

15 min

1

Remove the three screws to free the

fan.Remove the combustion

assembly (see 4.3) Twist the gas valve anti-clockwise to

disengage it from the fan

1. Venturi

2. Gasket

3. Fan

Fan & mixer venturi according to the model

Power Fan Venturi diameter

24 KW

EBM RG 128 45 W Ø 17 mm
EBM RG 128 45 W Ø 21 mm

30 KW

EBM RG 128 45 W Ø 25 mm

38 KW

56

4.5 GAS VALVE

GAS VALVE

Tools

Time

15 min

1

Replacement Gas Valves are

not factory set and will need to

be set up (see page 34)

Remove the combustion

assembly (see 4.3)

Twist the gas valve anti-clockwise to

disconnect it from the fan

Bayonet

connection

1. Venturi 4. Inlet test nipple

2. Gas valve 5. Offset adjustment

3. Solenoids 6. Throttle adjustment

MAINTENANCE GUIDE

57

MAINTENANCE GUIDE

5 ANNUAL MAINTENANCE

Plate heat exchanger

Maintenance Interval: As necessary
How: To measure specification of DHW performance.

By-pass & Safety valve

Maintenance Interval: Annually
How: Visual inspection / Clean as necessary

Central heating filter

Maintenance Interval: Annually
How: Visual inspection / Clean as necessary

Flow switch operation

Maintenance Interval: Annually
How: Visual inspection / Clean as necessary

/ Check flow rate

Expansion vessel

Maintenance Interval: Annually
How: Check air pressure is at 1 bar (System drained)

Ignition & detection electrodes

Maintenance Interval: Annually
How: Visual inspection / Clean as necessary / Distance from the
burner / Ionisation current more than 1 µA

Burner

Maintenance Interval: Annually
How: Visual inspection / Clean as necessary

Fan

Maintenance Interval: Annually
How : Visual inspection / Clean as necessary

Primary Heat exchanger

Maintenance Interval: Annually
How : Visual inspection / Clean as necessary

58

5. ANNUAL MAINTENANCE

Condensate trap

Maintenance Interval: Annually
or after cleaning primary heat exchanger

How : Visual inspection / Clean as necessary /
Add water before replacing

Pump

Maintenance Interval: At the first ignition and annually
How: Check that the AAV is open /

Visual inspection / Clean as necessary

MAINTENANCE GUIDE

59

SHORT LIST

Ind 02 - 03/04/2007

Key N

Description

Manf. Pt.N

Other

Type

Manf. date

from to

CLAS HE

24 30 38

0100 BURNER ASSEMBLY

0110 IGNITION ELECTRODE 61317432

...

0111 IONIZATION ELECTRODE 61317433

...

0112 GASKET D:85-66.5-2.5 61314753

...

0134 ELECTRODE GASKET 60000286

...

0135 COMBUSTION CHAMBER LINING KIT 60000297

...

0136 DOOR GASKET 60000623

...

0400 GAS SECTION

0401 GAS VALVE 60000537

...

0407 FAN ASSY 60000622

...

0500 HYDRAULIC BLOCK

0502 MOTOR - THREE-WAY VALVE 61302483

...

0504 OVERHEAT THERMOSTAT 100C 61010572

...

0506 3-WAY SPRING KIT (D.H.W.) 65104314

...

0507 TEMPERATURE PROBE + CLIP 990686

...

0517 LOW PRESSURE SWITCH 65105090

...

0530 AUTO AIR VENT WITH O-RING 65104703

...

0537 PRESSURE RELIEF VALVE 61312668

...

0538 PUMP 6M 2V 60000591

...

0543 SENSOR (REED) 65104323

...

0575 NTC PROBE 65104338

...

0589 SECONDARY EXCHANGER 65104333

...

0600 ELECTRICAL BOX

0607 IGNITER 61002105-20

...

0615 PRINTED CIRCUIT BOARD 60000566

...

0616 PRINTED CIRCUIT BOARD (DISPLAY) 65104448

...

0625 PRESSURE GAUGE 65104234

...

136

135

112

134

111

110

537

407

401

507

504

517

538

530

589

590

502

506

615

607

625

616

SHORT LIST

543

575

CLAS

60

BENCHMARK No.

FOR ALL BOILERS CONFIRM THE FOLLOWING

BOILER SERIAL No. NOTIFICATION No.

CONTROLS

To comply with the Building Regulation, each section must have a tick in one or other of the boxes

THE SYSTEM HAS BEEN FLUSHED IN ACCORDANCE WITH THE BOILER MANUFACTURER’S INSTRUCTIONS?

THE SYSTEM CLEANER USED

THE INHIBITOR USED

FOR THE CENTRAL HEATING MODE, MEASURE & RECORD

GAS RATEm3/hrft3/hr

BURNER OPERATING PRESSURE ( IF APPLICABLE)N/Ambar

CENTRAL HEATING FLOW TEMPERATURE°C

CENTRAL HEATING RETURN TEMPERATURE°C

FOR COMBINATION BOILERS ONLY

HAS A WATER SCALE REDUCER BEEN FITTED?YESNO

WHAT TYPE OF SCALE REDUCER HAS BEEN FITTED

FOR THE DOMESTIC HOT WATER MODE, MEASURE & RECORD

GAS RATEm3/hrft3/hr

MAXIMUM BURNER OPERATING PRESSURE (IF APPLICABLE)N/Ambar

COLD WATER INLET TEMPERATURE°C

HOT WATER OUTLET TEMPERATURE°C

WATER FLOW RATEIts/min

FOR CONDENSING BOILERS ONLY CONFIRM THE FOLLOWING

THE CONDENSATE DRAIN HAS BEEN INSTALLED IN ACCORDANCE WITH

THE MANUFACTURER’S INSTRUCTIONS?YES

FOR ALL INSTALLATIONS CONFIRM THE FOLLOWING

THE HEATING AND HOT WATER SYSTEM COMPLIES

WITH CURRENT BUILDING REGULATIONS

THE APPLIANCE AND ASSOCIATED EQUIPMENT HAS BEEN INSTALLED AND COMMISSIONED

IN ACCORDANCE WITH THE MANUFACTURER’S INSTRUCTIONS

IF REQUIRED BY THE MANUFACTURER, HAVE YOU RECORDED A CO/CO2 RATIO READING?N/AYESCO/CO2RATIO

THE OPERATION OF THE APPLIANCE AND SYSTEM

CONTROLS HAVE BEEN DEMONSTRATED TO THE CUSTOMER

THE MANUFACTURER’S LITERATURE HAS BEEN LEFT WITH THE CUSTOMER

COMMISSIONING ENG’S NAMEPRINTCORGI ID N°.

SIGND

ATE

TIME & TEMPERATURE CONTROL TO HEATINGROOM T/STAT & PROGRAMMER/TIMERPROGRAMMABLE ROOMSTAT

TIME & TEMPERATURE CONTROL TO HOT WATERCYLINDER T/STAT & PROGRAMMER/TIMERCOMBI BOILER

HEATING ZONE VALVES

FITTED

NOT REQUIRED

HOT WATER ZONE VALVESFITTEDNOT REQUIRED

THERMOSTATIC RADIATOR VALVESFITTED

AUTOMATIC BYPASS TO SYSTEMFITTEDNOT REQUIRED

G A S B O I L E R C O M M I S S I O N I N G C H E C K L I S T

!

S E R V I C E I N T E R V A L R E C O R D

It is recommended that your heating system is serviced regularly

and that you complete the appropriate Service Interval Record Below.

Service Provider. Before completing the appropriate Service Interval Record below, please ensure you have carried out the service

as described in the boiler manufacturer’s instructions.Always use the manufacturer’s specified spare part when replacing all controls

SERVICE 1 DATE

ENGINEER NAME

COMPANY NAME

TEL No.

CORGI ID CARD SERIAL No.

COMMENTS

SIGNATURE

SERVICE 3 DATE

ENGINEER NAME

COMPANY NAME

TEL No.

CORGI ID CARD SERIAL No.

COMMENTS

SIGNATURE

SERVICE 5 DATE

ENGINEER NAME

COMPANY NAME

TEL No.

CORGI ID CARD SERIAL No.

COMMENTS

SIGNATURE

SERVICE 7 DATE

ENGINEER NAME

COMPANY NAME

TEL No.

CORGI ID CARD SERIAL No.

COMMENTS

SIGNATURE

SERVICE 9 DATE

ENGINEER NAME

COMPANY NAME

TEL No.

CORGI ID CARD SERIAL No.

COMMENTS

SIGNATURE

SERVICE 2 DATE

ENGINEER NAME

COMPANY NAME

TEL No.

CORGI ID CARD SERIAL No.

COMMENTS

SIGNATURE

SERVICE 4 DATE

ENGINEER NAME

COMPANY NAME

TEL No.

CORGI ID CARD SERIAL No.

COMMENTS

SIGNATURE

SERVICE 6 DATE

ENGINEER NAME

COMPANY NAME

TEL No.

CORGI ID CARD SERIAL No.

COMMENTS

SIGNATURE

SERVICE 8 DATE

ENGINEER NAME

COMPANY NAME

TEL No.

CORGI ID CARD SERIAL No.

COMMENTS

SIGNATURE

SERVICE 10 DATE

ENGINEER NAME

COMPANY NAME

TEL No.

CORGI ID CARD SERIAL No.

COMMENTS

SIGNATURE

!

Commercial subsidiaries: MTS (GB) Limited Professional Team Limited
MTS Building Suites 9 & 10, Plaza 256
Hughenden Avenue Blanchardstown Corporate Park 2
High Wycombe Ballycoolin
Bucks HP13 5FT Dublin 15
Telephone: [phone] Telephone: [phone]
Fax: [phone] Fax: [phone]
Internet: www.mtsgroup.com/uk Internet: www.mtsgroup.com/ie
E-mail: [e-mail] E-mail: [e-mail]
Technical Advice: 0870 241 8180 Technical Advice: [phone]
Customer Service: 0870 600 9888 Customer Service: [phone]

420010097002 - 08/2007