ariston Clas HE R12 User guide
Country of destination GB, IE
Gas red condensing wall hung boiler
G.C.N : 41-116 - 30 (12 kW)
G.C.N : 41-116 - 31 (18 kW)
G.C.N : 41-116 - 32 (24 kW)
CLAS HE R 12
CLAS HE R 18
CLAS HE R 24
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
Overall View ........................................................................... 7
Overall Dimension .............................................................. 8
Minimum Clearances .........................................................8
Technical Information ........................................................ 9
Installation
Reference Standards ........................................................11
Installing the Boiler ........................................................... 17
Gas Connection ..................................................................18
Central heating Connection ..........................................18
Instructions for Opening the Casing and Performing
an Internal Inspection ...................................................... 19
Connecting the Flue ......................................................... 21
Fitting the Coaxial Flue (Ø 60/100 Horizontal) ........22
Fitting the 5” Flue (Ø 80/125 Horizontal / Vertical)
Fitting the Coaxial Flue (Ø 60/100 Vertical) .............. 24
Fitting the Twin Pipe (Ø 80/80) .....................................25
Table of Flue Gas Exhaust Duct Lengths ...................27
Electrical Connections .....................................................29
Peripheral Unit Connection ...........................................29
Electrical Diagram .............................................................30
Wiring diagrams .................................................................31
23
Settings - Adjustment - Problem Identication
Menus
Accessing the Menus .......................................................42
Maintenance
General Comments ...........................................................49
General Access ...................................................................50
Electrical Unit ......................................................................51
Hydraulic Unit ..................................................................... 53
Burner Unit ..........................................................................55
Annual Maintenance ........................................................ 60
Benchmark Commissioning Checklist .......................61
Benchmark Service Interval Record ............................62
Spare Parts Short List .......................................................61
Commissioning
Initial Preparation .............................................................. 35
Electricity Supply ...............................................................35
Filling the Heating System .............................................35
Gas Supply ...........................................................................35
Water Treatment ................................................................35
First Igniton Operation .................................................... 36
Ignition procedure ............................................................ 37
Test Function and Combustion Analysis ...................39
AUTO Function ...................................................................40
Boiler Protection Devices
Boiler Protection Devices ...............................................41
Anti-Frost Device ...............................................................41
Table Summarising Error Codes ...................................41
2
overview
These instructions are suitable for CLAS HE R boilers :
Do not forget the Log Book!
The Benchmark Scheme
Benchmark places responsibilities on both manufacturers and installers. The purpose is to ensure that
customers are provided with the correct equipment for their needs, that it is installed, commissioned
and serviced in accordance with the manufacturer’s instructions by competent persons and that it
meets the requirements of the appropriate Building Regulations England & Wales. The Benchmark
Checklist can be used to demonstrate compliance with Building Regulations England & Wales and
should be provided to the customer for future reference.
Installers are required to carry out installation, commissioning and servicing work in accordance with
the Benchmark Code of Practice which is available from the Heating and Hotwater Industry Council
who manage and promote the Scheme. Visit www.centralheating.co.uk for more information.
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.
TECHNICAL DEPARTMENT CUSTOMER SERVICE
DEPARTMENT
Tel: 0870 241 8180 Tel: 0870 600 9888
Fax: 01494 459775 Fax: 01494 459775
GUARANTEE
The manufacturer’s guarantee is for 2 years from the date of purchase. The guarantee is invalidated if
the appliance is not installed in accordance with the recommendations made herein or in a manner not
approved by the manufacturer. To assist us in providing you with an ecient 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.
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
directly on:- 0800 915 0485.
Improper installation may cause damage or injury to individuals, animals and personal property for which
the manufacturer will not be held liable. To ensure ecient 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
Gas
MAX
MIN
Gas
mbar
mbar
1
2
5
4
3
6
7
19
8
9
10
11
12
14
15
16
17
18
13
20
21
22
Advice for the installer
The installation and rst ignition of the
boiler must be performed by qualied 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.
These appliance are designed for use on open
vented central heating systems. A kit is available to
allow the boiler to be used on a sealed system. These
appliances are designed for domestic use only.
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 specied 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 qualied
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
qualied 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 ue 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, a
4
qualied technician must check the eciency of the
ue 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-ecient 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
-
2004/108/CEE
relating to electromagnetic compatibility
-
92/42/CEE
relating to energy eciency
-
2006/95/CEE
relating to electrical safety
Legend :
1. Brand
Symbols used on the data plate
2. Manufacturer
3. Boiler model - Serial number
4. Commercial reference
5. Certication number
6. Destination country - gas category
7. Gas setting
8. Installation type
9. Electrical data
11. Maximum heating pressure
12. Boiler type
13. NOx class / Eciency
14. Input rating nominal heating
15. Power ouput heating
17. Boiler output eciency
18. Input rating nominal DHW
19. Gases which may be used
20. Minimum ambient temperature for use
21. Max. central heating temperature
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 asphyxiation 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 asphyxiation 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 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
overview
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 dierence 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 aected
by any work performed on the appliance and make
sure they operate correctly before restarting the
appliance.
Explosions, res or asphyxiation 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
dierent 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,
asphyxiation.
5
product description
5
3
2
1
4
9
10
11
8
7
6
12
Control panel
Legend :
1. Display
eset button
2. R
3. Red indicator lockout light
4. Button
5. Temperature regulation knob
6. Esc button
_
6
7. Menu / OK button (Programming key)
8. Button
+
9. ON/OFF button / Green indicator ON/OFF
10. Blue indicator burner ON
11. Green indicator A
12. A
uto button (To activate Thermoregulation)
uto function
Overall view
1
2
3
4
7
5
6
8
9
10
11
18
19
17
16
15
14
13
12
product description
1. Central heating return
2. Central heating ow
3. Burner
4. Detection electrode
5. C.H. Return temperature probe
6. C.H. Flow temperature probe
7. Manual air vent
8. Gas valve
9. Trap
10. Electrical box
11. Gas tap
12. Display box
13. Electrical connection box
14. Modulating fan
15. Ignition electrodes
16. Ignitor
17. Thermal fuse
18. Combustion analysis test point
19. Flue connector
7
product description
200
200
120
120
85
77
122
25
595
49
161
292 (12-18-24 kW)
362 (30 kW)
135
162
665
44.5
450
300
250
5
5
Overall Dimensions
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.
8
Technical Data
GENERAL
NOTE
Model CLAS HE R
12
18
CE Certication (pin)
0085BR0347
Boiler type
B23-C13-C33-C43-C53-C83
POWER SPECIFICATIONS
Max/min nominal caloric ow rate (Pci) Qn
kW
12.0/3.0
18.0/4.5
Max/min nominal caloric ow rate (Pcs) Qn
kW
13.3/3.3
20.0/5.0
Max/min power output (80°C-60°C) Pn
kW
11.7/2.8
17.6/4.3
Max/min power output (50°C-30°C) Pn
kW
12.9/3.2
19.1/4.7
Combustion eciency (of ue gas)
%
97.8
97.6
Nominal caloric ow rate eciency (60/80°C) Hi/Hs
%
97.6/87.9
97.7/88.0
Nominal caloric ow rate eciency (30/50°C) (condensation) Hi/Hs
%
107.1/96.4
106.2/95.6
Eciency at 30% at 30°C (condensation) Hi/Hs
%
108.7/97.9
107.8/97.1
Eciency at 30% at 47°C Hi/Hs
%
99.2/89.3
101.9/91.8
Minimum caloric ow rate eciency (60/80°C) Hi/Hs
%
94.3/84.9
94.7/85.3
Eciency rating (dir. 92/42/EEC)
stars
****
****
Sedbuk Band Rating
band/%
A / 90.1
A / 90.1
Loss when stopped (∆T = 50°C)
%
0.3
0.2
Loss of burner gas when operating
%
2.2
2.4
EMISSIONS
Available air pressure
Pa5391
NoX class (less than 70mg/kWh)
class55
Flue gas temperature (G20) (80°C-60°C)
°C6569
CO2 content (G20) (80°C-60°C)
%
9.0
9.2
CO content (0%O2) (80°C-60°C)
ppm
< 80
< 170
O2 content (G20) (80°C-60°C)
%
4.5
4.2
Maximum ue gas ow (G20) (80°C-60°C)
Kg/h
19.8
29.1
Excess air (80°C-60°C)
%2725
HEATING
CIRCUIT
Minimum/Maximum heating pressure
bar
0,2/3
0,2/3
Min/max heating temperature (high temperature range)
°C
35/82
35/82
Min/max heating temperature (low temperature range)
°C
20/45
20/45
ELECTRICAL
Power supply frequency/voltage
V/Hz
230/50
230/50
Total electrical power absorbed
W
135
142
Minimum ambient temperature for use
°C+5+5
Protection level for the electrical appliance
IP
X5D
X5D
Weightkg23
23
product description
9
product description
GENERAL
NOTE
Model CLAS HE R
24
CE Certication (pin)
0085BR0347
Boiler type
B23-C13-C33-
C43-C53-C83
POWER SPECIFICATIONS
Max/min nominal caloric ow rate (Pci) Qn
kW
24.6/5.3
Max/min nominal caloric ow rate (Pcs) Qn
kW
27.3/5.9
Max/min power output (80°C-60°C) Pn
kW
24.1/5.0
Max/min power output (50°C-30°C) Pn
kW
26.0/5.4
Combustion eciency (of ue gas)
%
97.5
Nominal caloric ow rate eciency (60/80°C) Hi/Hs
%
98.2/88.4
Nominal caloric ow rate eciency (30/50°C) (condensation) Hi/Hs
%
105.7/95.2
Eciency at 30% at 30°C (condensation) Hi/Hs
%
109.0/98.1
Eciency at 30% at 47°C Hi/Hs
%
103.7/93.4
Minimum caloric ow rate eciency (60/80°C) Hi/Hs
%
94.3/84.9
Eciency rating (dir. 92/42/EEC)
stars
****
Sedbuk Band Rating
band/%
A / 90.3
Loss when stopped (∆T = 50°C)
%
0.2
Loss of burner gas when operating
%
2.5
EMISSIONS
Available air pressure
Pa
137
NoX class (less than 70mg/kWh)
class
5
Flue gas temperature (G20) (80°C-60°C)
°C
72
CO2 content (G20) (80°C-60°C)
%
9.3
CO content (0%O2) (80°C-60°C)
ppm
< 180
O2 content (G20) (80°C-60°C)
%
4.0
Maximum ue gas ow (G20) (80°C-60°C)
Kg/h
39.4
Excess air (80°C-60°C)
%
23
HEATING
CIRCUIT
Minimum/Maximum heating pressure
bar
0,2/3
Min/max heating temperature (high temperature range)
°C
35/82
Min/max heating temperature (low temperature range)
°C
20/45
ELECTRICAL
Power supply frequency/voltage
V/Hz
230/50
Total electrical power absorbed
W
144
Minimum ambient temperature for use
°C
+5
Protection level for the electrical appliance
IP
X5D
Weightkg23
Technical Data
10
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 eect, 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 non-hazardous 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 5440-1:2008 Flues
BS 5440-2:2008 Air supply
BS 5449:1990 Forced circulation 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 Specication for expansion
vessels
BS 5482:1994 Installation of L.P.G.
Domestic heating compliance
guide
and in the Republic of Ireland in accordance with the
following codes of practice:
I.S. 813 Domestic Gas Installations
installation
Avoid installing the boiler where the air inlet can
be polluted by chemical 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 gases. The terminal should
therefore be located with due regard for the damage
or discolouration that may occur to building within
the vicinity and consideration must also be given
to adjacent boundaries, openable windows etc. The
minimum acceptable clearances are shown on page
12.
11
installation
The minimum acceptable clearances are shown below:
- A Directly above or 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
Note: 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 specic ventilation. If the boiler is installed
in a cupboard or compartment, ventilation 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.
12
Electrical Supply
The 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 double 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 should only supply the appliance.
Automatic by pass
Ariston recommend that an automatic by pass is
installed a minimum of 1.5 metres away from the
boiler to ensure the minimum required ow rate
is achieved at all times. Additionally the design
of the system and its controls must ensure that
an adequate temperature dierential is met, and
should be such to prevent boiler cycling.
Feed and vent pipework
Heating Circuit
Boiler
15mm (Min.)
Automatic By-Pass
Pump
2M
Minimum
150mm
Max.
500mm Minimum
Height
22mm (Min.) Vent Pipe
15mm (Min.) Cold Feed
Cylinder
R
F
Return
Flow
Return
Flow
The feed and vent pipework from the boiler to the F
& E (Feed & Expansion) tank should be congured as
shown in the g. below.
installation
13
installation
mWH
l/h
0
100
200
300
400 500 600 700 800 900
1000 1100
1200
1300
1400
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
12-18 kW
12 kW
18 kW
821 l/h = 20 Δ @ 19.1 kW
555 l/h = 20 Δ @ 12.9 kW
1.3 mWH
2.65 mWH
24 kW
1118 l/h = 20 Δ @ 26.0 kW
3.7 mWH
Note:
• The distance between the cold feed and the open
vent pipe shall be no more than 150mm.
• The cold feed must be inverted as shown.
• The open vent pipe must be a minimum of 22mm
diameter.
• The cold feed pipe must be a minimum of 15mm
diameter.
• The cold feed and open vent pipes must rise
continuously and be unrestricted.
• The minimum distance from the top of the boiler
to the bottom of the F & E tank shall be no less
than 2m. Whilst the maximum distance shall be
not more than 27m.
• The distance between the bottom of the F & E
tank and the highest point of the open vent must
be no less than 500mm.
• The ow and return pipes from the boiler must
rise continuously and be unrestricted.
• The supply of water to the F & E tank should be
taken from the mains water supply via a suitable
oat operated valve. While the supply from the F
& E tank to the boiler/heating circuit (via the cold
feed) shall be unrestricted.
• The F & E tank must be adequately supported
and installed in accordance with relevant Building
Regulations.
Pressure Loss Graphs through the boilers
Pump specication
The pump should be tted on the ow pipe from
the boiler and have isolating valves each side. A
variable duty pump should be set to give a temperature dierential of no greater than 20ºC.
Draining tap
A draining tap must be provided at all the lowest
points of the system which will allow the entire
system to be drained. A drain tap must also be
installed on the ow and return pipes immediately
above the boiler to ensure complete draining of the
primary ow and return is possible.
Drain taps shall be to the current standard of BS
2879.
Sealed water systems
A sealed system kit is available from Ariston. Installation instructions are supplied with the kit.
14
Flushing and Water Treatment
The boiler is equipped with a stainless steel heat
exchanger.
The detailed recommendations for water treatment
are given in BS 7593:1992 (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 red
before the system has been thoroughly ushed;
the ushing procedure must be in line with BS
7593:1992.
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 dissolve 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 compromises the eciency
of the thermic heat exchanger because small areas
of scale cause a high increase in 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.
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.
Periodicaly check the pH balance of the water/antifreeze 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.
installation
To prevent this problem it is necessary to use pipes
with an “oxygen proof barrier”, in accordance with
standards DIN 4726/4729. If pipes of this kind are
not used, keep the system separate by installing
heat exchangers of those with a specic system
water treatment.
IMPORTANT
Failure 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 benecial to the ecient operation of the
system. The boiler connections for external controls
are 240V.
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 proong 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 ecient removal of the ue products. A
compartment or cupboard may be used provided
that it has been built or modied for this purpose. It
is not necessary to provide permanent ventilation
for cooling purposes. Detailed recommendations
are given in BS 5440 Part 2. If it is proposed that it
is to be installed in a timber framed building then
reference 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
specically in accordance with current IEE Wiring
Regulations.
For unusual locations, special procedures may be
necessary. BS 6798:2000 gives detailed guidance
on this aspect.
15
installation
trap
trap
Condensate Discharge
The condensate discharge hose from the boiler
must have a continuous fall of 2.5o and must be
inserted by at least 50mm into a suitable acid
resistant pipe - e.g. plastic waste or overow
pipe. The condensate discharge pipe must have
a minimum diameter 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 incorporated
into the pipe run, there also must be an air break
upstream of the trap.
ii) Connecting into the waste system of the
building such as a washing maching or sink trap.
The connection must be upstream of the washing
machine/sink. If the connection is downstream
of 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 water 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.
2. External terminaton of condensate drainage pipe
via internal discharge branch (e.g. sink waste) and
condensate siphon.
3. External termination of condensate drainage
pipe via internal discharge branch (e.g. sink waste
- proprietary tting).
1. Internal termination of codensate drainage pipe
to internal stack.
16
4. External termination of condensate drainage pipe
via condensate siphon
Installing the Boiler
Please check that you are familiar with the
installation requirement before commencing work
(pages 8 - 16).
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 clearances)
- Gas isolation valve (compression)
- Washers
- Installation, Servicing and User manual
- Flue gasket
- Fixing screws
installation
Filling the system/condensate discharge
Fill the central heating and bleed air from the
system as described in the Commissioning
Instructions.
The system should be carefully checked for leaks,
as frequent relling could cause premature system
corrosion or unnecessary scaling of the heat
exchanger.
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 16 for condensate discharge options.
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, ensure the
hanging bracket is xed square on the wall. Remove
the boiler from its packaging.
Place the boiler on the hanging bracket.
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 19
- Remove the cap and connect the gas isolation
valve to the boiler using the washer provided (C)
page 18;
17
installation
A
B
C
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 specic legal requirements
and in accordance with the maximum power of the
boiler; ensure the gas isolation valve is connected
correctly, see drawing opposite.
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 insucient the
power may be reduced, causing inconvenience for
the user.
Central Heating connection
Drain O Cocks
C. Gas Inlet
A. Central Heating Return
B. Central Heating Flow
(pipes 22mm)
18
Note: For IE use 3/4"» + 1/2"
olives provided
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. Loosen the two screws on the front casing (a), pull
it forwards and unhook it from the upper pins (b)
3. Remove the control panel (c)
4. Unhook the two clips on the combustion chamber
panel and lift o (d).
(a)
installation
(c)
(b)
(d)
19
installation
2
1
4
3
6
7
8
5
A
B
C
Before the boiler is used for the rst time,
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 ret it
Warning! Insucient water in the trap can
temporarily cause the ue gas to be expelled
into the surrounding ambient air.
Water circuit diagram
1. C.H. ow temperature probe
2. C.H. return temperature probe
3. Burner
4. Detection electrode
5. Condensate trap
6. Modulating fan
7. Ignition electrodes
8. Thermal fuse
20
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