Ariston ACO 27 MFFI Technical information

Ariston ACO 27 MFFI Technical information
SERIES
Installation and
Servicing
Instructions
Type C Boilers
G.C.N:
G.C.N:
G.C.N:
G.C.N:
47-116-34
47-116-35
47-116-09
47-116-10
LEAVE THESE
INSTRUCTIONS WITH THE
END-USER
Country of destination: GB/IE
TABLE OF CONTENTS
1.
GENERAL INFORMATION
1.1.
1.2.
1.3.
2.
3.6.
3.6.1.
3.6.2.
3.6.3.
3.6.4.
3.6.5.
3.6.6.
3.7.
3.8.
3.9.
3.10.
3.11.
5.
REFERENCE STANDARDS
SITING THE APPLIANCE
OVERALL DIMENSIONS
MINIMUM CLEARANCES
MOUNTING THE APPLIANCE
ELECTRICAL CONNECTION
GAS CONNECTION
WATER CONNECTIONS
FLUE CONNECTIONS
ACCESSORY CONNECTION
ELECTRICAL DIAGRAM
WATER CIRCUIT DIAGRAM
INITIAL PREPARATION
REMOVING THE CASING
CONTROL PANEL
INITIAL START-UP
DISPLAY: MESSAGES SHOWN DURING
NORMAL OPERATION
OPERATING PARAMETERS
REGULATION MENU TABLE
SETTINGS DISPLAY
GAS REGULATION CHECK
IGNITION DELAY ADJUSTMENT
ADJUSTING THE MAXIMUM HEATING POWER
SOFT LIGHT ADJUSTMENT
CHANGING THE TYPE OF GAS
BOILER SAFETY SYSTEMS
COMBUSTION ANALYSIS
COMPLETION
DRAINING
ZONE VALVES
MAINTENANCE
5.1.
5.2.
5.3.
5.4.
2
6.3.1.
6.3.2.
6.3.3.
6.3.4.
6.3.5.
6.3.6.
6.3.7.
6.4.
6.4.1.
6.4.2.
6.5.
6.5.1.
6.5.2.
6.5.3.
6.5.4.
6.5.5.
COMMISSIONING
3.1.
3.2.
3.3.
3.4.
3.5.
4.
SERVICING INSTRUCTIONS
6.1.
6.2.
6.3.
INSTALLATION
2.1.
2.2.
2.3.
2.4.
2.5.
2.6.
2.7.
2.8.
2.9.
2.10.
2.11.
2.12.
3.
6.
GENERAL INFORMATION
TECHNICAL INFORMATION
OVERALL VIEW
GENERAL REMARKS
CLEANING THE PRIMARY EXCHANGER
CLEANING THE CONDENSATE TRAP
OPERATIONAL TEST
6.5.6.
6.5.7.
6.5.8.
6.5.9.
6.5.10.
6.5.11.
6.6.
6.6.1.
6.6.2.
6.6.3.
7.
FAULT FINDING
7.1
8.
REPLACEMENT OF PARTS
TO GAIN GENERAL ACCESS
ACCESS TO THE COMBUSTION CHAMBER
REMOVING THE FAN
REMOVING THE AIR PRESSURE SWITCH
REMOVING THE BURNER
REMOVING THE ELECTRODES
REMOVING THE HEAT EXCHANGER
REMOVING THE CONDENSATE TRAP (TUBE)
REMOVING THE CONDENSATE TRAP
ACCESS TO THE GAS VALVE
REMOVING THE GAS VALVE
REMOVING THE SPARK GENERATOR
ACCESS TO THE WATER CIRCUIT
REMOVING THE D.H.W.
(SECONDARY) EXCHANGER
REMOVING THE SAFETY VALVE
REMOVING THE AUTOMATIC AIR VENT
REMOVING THE DIVERTER VALVE ACTUATOR
REMOVING THE DHW FLOW SWITCH
(MFFI ONLY)
REMOVING THE PUMP
REMOVING THE PRESSURE GAUGE
REMOVING THE EXPANSION VESSEL
REMOVING THE D.H.W. TEMPERATURE
PROBE (N.T.C. - MFFI ONLY)
REMOVING THE C.H. FLOW TEMPERATURE
PROBE (N.T.C.)
REMOVING THE C.H. RETURN TEMPERATURE
PROBE (N.T.C.)
ACCESS TO THE CONTROL SYSTEM
CHECKING THE FUSES
REMOVING THE PRINTED CIRCUIT BOARDS
REMOVING THE TIME CLOCK
FAULT FINDING GUIDE (FLOW-CHARTS)
SHORT SPARES PARTS LIST
8.1.
ACO 27 MFFI
1. GENERAL INFORMATION
1.1.
This manual is an integral and essential part of the product. It
should be kept with the appliance so that it can be consulted by
the user and our authorised personnel.
Read the instructions and recommendations in these Installation
and Servicing Instructions carefully to ensure proper installation,
use and maintenance of the appliance.
Please carefully read the instructions and notices about the unit
contained in this manual, as they provide important information
regarding the safe installation, use and maintenance of the
product.
Keep this manual in a safe place. You may need it for your own
reference while Servicing Technicians or your installer may
need to consult it in the future.
For operating instructions please consult the separate Users
Manual.
GENERAL INFORMATION
This is a combined appliance for the production of central
heating (C.H.) and domestic hot water (D.H.W.).
This appliance must be used only for the purpose for which it is
designed.
The manufacturer declines all liability for damage caused by
improper or negligent use.
No asbestos or other hazardous materials have been used in
the fabrication of this product.
Before connecting the appliance, check that the information
shown on the data plate and the table in section 7 comply with
the electric, water and gas mains of the property. You will find the
data plate on the reverse of the control panel.
The gas with which this appliance operates is also shown on the
label at the bottom of the boiler.
Do not install this appliance in a damp environment or close to
equipment which spray water or other liquids.
Do not place objects on the appliance.
Do not allow children or inexperienced persons to use the
appliance without supervision.
If you smell gas in the room, do not turn on or off light
switches, use the telephone or any other object which might
cause sparks.
Open doors and windows immediately to ventilate the room.
Shut the gas mains tap (at or adjacent to the gas meter) or the
valve of the gas cylinder and call your Gas Supplier immediately.
If you are going away for a long period of time, remember to shut
the mains gas tap or the gas cylinder valve.
Always disconnect the appliance either by unplugging it from
the mains or turning off the mains switch before cleaning the
appliance or carrying out maintenance.
In the case of faults or failure, switch off the appliance and
turn off the gas tap. Do not tamper with the appliance.
For repairs, call your local Authorised Servicing Agent and
request the use of original spare parts. For in-guarantee repairs
contact MTS (GB) Limited.
3
General Info
Name
CE Certification
Flue Type
Energy Performance
Heat Input max/min (Central Heating)
Heat Input max (Domestic Hot Water)
Heat Output max/min
Efficiency of Nominal Heat Input (60/80°C)
Efficiency of Nominal Heat Input (30/50°C)
Efficiency at 30% of Nominal Heat Input (47°C)
Efficiency at 30% of Nominal Heat Input (30°C)
Efficiency at Minum Input
Efficiency (Dir. 92/42/EEC)**
SEDBUK Rating
Heat Loss to the Casing (∆T=50°C)
Flue Heat Loss with Burner Operating
Flue Heat Loss with Burner Off
kW
kW
kW
%
%
%
%
%
Band
%
%
%
A
0,5
2,6
0,4
A
0,5
2,6
0,4
Emissions
Max Discharge of Products of Combustion (G20)
Residual Discharge Head
Temp. of exhaust fumes at nominal capacity
CO2 Content
O2 Content
CO Content
Nox Class
Kg/h
mbar
°C
%
%
ppm
35,3
0,61
72
9,1
4,3
109
5
35,3
0,61
72
9,1
4,3
109
5
Central Heating
TECHNICAL INFORMATION
Head Loss on Water Side (max) (T=20°C)
Residual Head of System
Expansion Vessel Pre-load Pressure
Maximum Heating Pressure
Expansion Vessel Capacity
Maximum Water Content of System
Heating Temperature max/min (High temperature)
Heating Temperature max/min (Low Temperature)
mbar
bar
bar
bar
l
l
°C
°C
200
0,2
0,7
3
7
130
82 / 42
75 / 20
200
0,2
0,7
3
7
130
82 / 42
75 / 20
Domestic Hot Water
1.2.
Domestic Hot Water Temperature (approx) max/min
Specific Flow Rate (10 minutes/DT 30°C)
D.H.W. Flow Rate ∆T=25°C
D.H.W. Flow Rate ∆T=35°C
D.H.W. Minimum Flow Rate
Pressure of Domestic Hot Water max/min
°C
l/min
l/min
l/min
l/min
bar
56 / 36
12,6
15,2
10,8
2,5
6 / 0,2
Max. Condensate produced
PH of condensate
l/h
W
25,5 / 8,9
27,0
22,5 / 7,7
88,2
88,2
92,9
92,9
86,7
25,5 / 8,9
----22,5 / 7,7
88,2
88,2
92,9
92,9
86,7
1,5
4
1,5
4
Gas
ACO 27 RFFI SYSTEM
0085BP0229
C13-C33-C43-C53-C83-B23-B33
Nominal Pressure
Natural Gas (G20)
Consumption at Nominal Capacity(G20)
Gas Consumption after 10 Minutes*
mbar
m3/h
m3
20
2,43
0,85
20
2,43
0,85
Elettrical Data
ACO 27 MFFI
0085BP0229
C13-C33-C43-C53-C83-B23-B33
Electrical Supply
Power Consumption
Minimum Ambient Temperature
Protection Grade of Electrical System
Internal Fuse Rating
V/Hz
W
°C
IP
230/50
118
+5
24D
230/50
118
+5
24D
Weight
Dimensions (W/D/H)
Kg
mm
40
280/450/750
40
280/450/750
47-116-34
47-116-09
G.C. Number
* Calculated at 70% maximum output
** Calculated on Upper calorific value
4
General Info
Name
CE Certification
Flue Type
Energy Performance
Heat Input max/min (Central Heating)
Heat Input max (Domestic Hot Water)
Heat Output max/min
Efficiency of Nominal Heat Input (60/80°C)
Efficiency of Nominal Heat Input (30/50°C)
Efficiency at 30% of Nominal Heat Input (47°C)
Efficiency at 30% of Nominal Heat Input (30°C)
Efficiency at Minum Input
Efficiency (Dir. 92/42/EEC)**
SEDBUK Rating
Heat Loss to the Casing (∆T=50°C)
Flue Heat Loss with Burner Operating
Flue Heat Loss with Burner Off
kW
kW
kW
%
%
%
%
%
Band
%
%
%
A
0,5
2,7
0,4
A
0,5
2,7
0,4
Emissions
Max Discharge of Products of Combustion (G20)
Residual Discharge Head
Temp. of exhaust fumes at nominal capacity
CO2 Content
O2 Content
CO Content
Nox Class
Kg/h
mbar
°C
%
%
ppm
45,7
1
76,4
8,7
5
71
5
45,7
1
76,4
8,7
5
71
5
Central Heating
Head Loss on Water Side (max) (T=20°C)
Residual Head of System
Expansion Vessel Pre-load Pressure
Maximum Heating Pressure
Expansion Vessel Capacity
Maximum Water Content of System
Heating Temperature max/min (High temperature)
Heating Temperature max/min (Low Temperature)
mbar
bar
bar
bar
l
l
°C
°C
200
0,2
0,7
3
7
130
82 / 42
75 / 20
200
0,2
0,7
3
7
130
82 / 42
75 / 20
Domestic Hot Water
Domestic Hot Water Temperature (approx) max/min
Specific Flow Rate (10 minutes/DT 30°C)
D.H.W. Flow Rate ∆T=25°C
D.H.W. Flow Rate ∆T=35°C
D.H.W. Minimum Flow Rate
Pressure of Domestic Hot Water max/min
°C
l/min
l/min
l/min
l/min
bar
56 / 36
15,3
18,3
13,1
2,5
6 / 0,2
Max. Condensate produced
PH of condensate
l/h
W
31,6 /10,5
32,0
28 / 9,5
97,3
88,5
91,2
97,1
89,7
31,6 /10,5
----------28 / 9,5
97,3
88,5
91,2
97,1
89,7
1,8
4
1,8
4
Gas
ACO 32 RFFI SYSTEM
0085BP0229
C13-C33-C43-C53-C83-B23-B33
Nominal Pressure
Natural Gas (G20)
Consumption at Nominal Capacity(G20)
Gas Consumption after 10 Minutes*
mbar
m3/h
m3
20
3,01
0,35
20
3,01
0,35
Elettrical Data
ACO 32 MFFI
0085BP0229
C13-C33-C43-C53-C83-B23-B33
Electrical Supply
Power Consumption
Minimum Ambient Temperature
Protection Grade of Electrical System
Internal Fuse Rating
V/Hz
W
°C
IP
230/50
118
+5
24D
230/50
118
+5
24D
Weight
Dimensions (W/D/H)
Kg
mm
42
280/450/750
40
280/450/750
47-116-35
47-116-10
G.C. Number
* Calculated at 70% maximum output
** Calculated on Upper calorific value
5
1.2.
OVERALL VIEW
27/32 RFFI SYSTEM
27/32 MFFI
1
26
1
26
2
3
25
2
3
25
4
5
4
5
6
7
8
6
7
8
24
24
9
9
23
23
22
22
21
20
10
10
20
11
19
19
18
18
12 13 14 15
16 17
12
14 15
16 17
FIG. 1.0
LEGEND:
1. Flue connector
2. Mixer
3. Fan
4. Spark generator
5. Burner
6. Ignition and detection electrode
7. Air release valve
8. Main heat exchanger (aluminium)
9. Central Heating flow temperature probe
10. Automatic by-pass
11. Domestic Hot Water temperature probe
12. Safety valve (3 bar)
13. Secondary heat exchanger
14. Gas valve
15. Condensate discharge
16. Condensate trap inspection cap
17. Drain valve
18. Domestic Hot Water flow switch
19. Circulation pump with automatic air release valve
20. Condensate trap
21. Diverter valve
22. Condensate trap (tube)
23. Central Heating return temperature probe
24. Expansion vessel
25. Air pressure switch
26. Combustion analysis test point
6
2. INSTALLATION
2.1.
REFERENCE STANDARDS
The technical information and instructions provided herein below
are intended for the installer / Servicing Technician so that the
unit may be installed and serviced correctly and safely.
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 effect, 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”, the current Building Regulations, reference should
also be made to the current ETCI rules for electrical installation.
This appliance must be installed by a competent installer in
accordance with current Gas Safety (installation & use)
Regulations.
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 bylaws of the local water
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, 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.
2.2.
SITING THE APPLIANCE
The appliance may be installed in any room or indoor area,
although particular attention is drawn to the requirements of the
current I.E.E. Wiring Regulations, and in Scotland, the electrical
provisions of the Building Regulations applicable in Scotland,
with respect to the installation of the combined appliance in a
room containing a bath or shower, the location of the boiler in a
room containing a bath or shower should only be considered if
there is no alternative.
Where a room-sealed appliance is installed in a room
containing a bath or shower the appliance and any
electrical switch or appliance control, utilising mains
electricity should be situated so that it cannot be touched
by a person using the bath or shower, specifically in
accordance with current IEE Wiring Regulations.
The location must permit adequate space for servicing and air
circulation around the appliance as indicated in Section 2.4.
The location must permit the provision of an adequate flue and
termination.
For unusual locations special procedures may be necessary.
BS 6798-1987 gives detailed guidance on this aspect.
A compartment used to enclose the appliance must be designed
specifically for this purpose. No specific ventilation requirements
are needed for the installation within a cupboard.
This appliance is not suitable for outdoor installation.
The type C appliances (in which the combustion circuit, air
vent intake and combustion chamber are air-tight with
respect to the room in which the appliance is installed) can
be installed in any type of room.
Secondary ventilation is not required with this boiler. The boiler
must be installed on a solid, non-combustible, permanent wall to
prevent access from the rear.
Installation should also comply with the following British
Standard Codes of Practice:
Treatment of water in domestic hot water
central heating systems
BS 5546:1990 Installation of hot water supplies for
domestic purposes
BS 5440-1:2000 Flues
BS 5440-2:2000 Air supply
BS 5449:1990 Forced circulation hot water systems
BS 6798:1987 Installation of gas fired hot water boilers
of rated input not exceeding 60kW
BS 6891:1989 Installation of low pressure gas pipe up to
28mm
BS 7671:2001 IEE wiring regulations
BS 4814:1990 Specification for expansion vessels
BS 5482:1994 Installation of L.P.G.
BS 7593:1992
and in the Republic of Ireland in accordance with the following
Codes of Practice:
I.S. 813
Domestic Gas Installations
The appliance may be installed in any room or indoor area,
although particular attention is drawn to the requirements of the
current I.E.E. Wiring Regulations, and in Scotland, the electrical
provisions of the Building Regulations applicable in Scotland,
7
OVERALL DIMENSIONS
27/32 RFFI SYSTEM
143
450
130
35
2.3.
130
225
750
225
5
785
132
132
93
118
123
acqua
gas
45
50
F
93
280
FIG. 2.1
450
280
FIG. 2.0
2.4.
MINIMUM CLEARANCES
LEGEND:
In order to allow access to the interior of the boiler for maintenance
purposes, the boiler must be installed in compliance with the
clearance requirements indicated in the diagram below.
A = Central Heating Flow (3/4”)
B = Domestic Hot Water Outlet (1/2”)
C = Gas Inlet (3/4”)
D = Domestic Cold Water Inlet (1/2”)
E = Central Heating Return (3/4”)
F = Condensate discharge
27/32 MFFI
130
143
35
450
300
27/32 MFFI
20
20
130
450
225
300
750
225
5
FIG. 2.2
65
67
67
65
93
118
123
acqua
gas
45
50
F
93
280
FIG. 2.1
8
2.6. ELECTRICAL CONNECTION
27/32 RFFI SYSTEM
300
The boiler operates with alternating current, as indicated in the
technical data table (Section 1.2), where the maximum absorbed
power is also indicated. Make sure that the connections for the
neutral and live wires correspond to the indications in the
diagram. The appliance electrical connections are situated on
the reverse of the control panel (see the Servicing Instructions
for further information Section 6).
IMPORTANT!
In the event that the power supply cable must be changed,
replace it with one with the same specifications. Make the
connections to the terminal board located within the control
panel, as follows:
- The yellow-green wire should be connected to the terminal
marked with the earth symbol; make sure to re-use the ferrule
mounted on the other supply cable;
- The blue wire should be connected to the terminal marked “N”;
- The brown wire should be connected to the terminal marked “L”.
85 mm
220 mm
FIG. 2.2
FIG. 2.3
Note: The diagrams for the electrical system are indicated in
section 2.11.
2.5. MOUNTING THE APPLIANCE
Fasten the boiler in place using the template and anchors
supplied with the unit. It is highly recommended that a spirit level
be used to position the boiler so that it is perfectly level.
For additional information, please consult the instructions
contained in the connection kit and the flue kit.
For safety purposes, have a competent person carefully check
the electrical system in the property, as the manufacturer will not
be held liable for damage caused by the failure to earth the
appliance properly or by anomalies in the supply of power. Make
sure that the residential electrical system is adequate for the
maximum power absorbed by the unit, which is indicated on the
rating plate. In addition, check that the section of cabling is
appropriate for the power absorbed by the boiler.
Warning, this appliance must be earthed.
External wiring to the appliance must be carried out by a
competent person and be in accordance with the current I.E.E.
Regulations and applicable local regulations.
The appliance is supplied with a fly-lead already connected, this
must be connected to a 240v supply fused at 3A and must
facilitate complete electrical isolation of the appliance, by the
use of a fused double pole isolator having a contact separation
of at least 3 mm in all poles or alternatively, by means of a 3 A
fused three pin plug and unswitched shuttered socket outlet
both complying with BS 1363.
The point of connection to the Electricity supply must be readily
accessible and adjacent to the appliance unless the appliance is
installed in a bathroom when this must be sited outside the
bathroom (see section 2.2).
Should external controls be required, the design of the external
electrical circuits should be undertaken by a competent person,
see Section 2.10 for further information.
2.7.
GAS CONNECTION
The local gas region contractor connects the gas meter to the
service pipe.
If the gas supply for the boiler serves other appliances ensure
that an adequate supply is available both to the boiler and the
other appliances when they are in use at the same time.
Pipe work must be of an adequate size. Pipes of a smaller size
than the boiler inlet connection should not be used.
9
2.8.
WATER CONNECTIONS
VIEW OF THE BOILER CONNECTIONS
27/32 MFFI
Legend:
A
B
C
D
E
H
I
J
I
A
B
C
D
J
27/32 RFFI SYSTEM
I
C
H
FIG. 2.4
10
J
Central Heating Flow
Domestic Hot Water Outlet
Gas Inlet
Domestic Cold Water Inlet
Central Heating Return
Condensate discharge
Safety valve discharge
Drain valve
E
H
A
=
=
=
=
=
=
=
=
E
Central Heating
Detailed recommendations are given in BS 6798:1987 and BS
5449-1:1990, the following notes are given for general guidance.
PIPE WORK:
Copper tubing to BS EN 1057:1996 is recommended for
water pipes. Jointing should be either with capillary soldered
or compression fittings.
Where possible pipes should have a gradient to ensure air is
carried naturally to air release points and water flows
naturally to drain taps.
The appliance has a built-in automatic air release valve, however
it should be ensured as far as possible that the appliance heat
exchanger is not a natural collecting point for air.
Except where providing useful heat, pipes should be
insulated to prevent heat loss and avoid freezing.
Particular attention should be paid to pipes passing through
ventilated spaces in roofs and under floors.
BY-PASS:
The appliance includes an automatic by-pass valve, which
protects the main heat exchanger in case of reduced or
interrupted water circulation through the heating system, due
to the closing of thermostatic valves or cock-type valves
within the system.
SYSTEM DESIGN:
This boiler is suitable only for sealed systems.
DRAIN COCKS:
These must be located in accessible positions to permit the
draining of the whole system. The taps must be at least
15mm nominal size and manufactured in accordance with BS
2870:1980.
SAFETY VALVE DISCHARGE:
The discharge should terminate facing downwards on the
exterior of the building in a position where discharging
(possibly boiling water & steam) will not create danger or
nuisance, but in an easily visible position, and not cause
damage to electrical components and wiring.
The discharge must not be over an entrance or a window or
any other type of public access.
CONDENSATE DISCHARGE:
The condensate discharge hose from the boiler must have a
continuous fall of 2.5° and must be inserted by at least 50 mm
into a suitable acid resistant pipe - e.g. plastic waste or
overflow pipe. The condensate discharge pipe must have a
continuous fall and preferably be installed and terminated
within the building to prevent freezing.
The discharge pipe must be terminated in a suitable position:
i) Connecting in to an internal soil stack (at least 450 mm
above the invert of the stack). A trap giving a water seal of
at least 75 mm 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 machine or sink trap. The connection must be
upstream of the washing machine/sink (If the connection
is down stream of the waste trap then an additional trap
giving a minimum water seal of 75 mm 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 soakway.
N OT E : If any condensate pipe work 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.
AIR RELEASE POINTS:
These must be fitted at all high points where air naturally
collects and must be sited to facilitate complete filling of the
system.
The appliance has an integral sealed expansion vessel to
accommodate the increase of water value when the system is
heated.
It can accept up to 7 l (1.5 gal) of expansion water. If the
heating circuit has an unusually high water content, calculate
the total expansion and add an additional sealed expansion
vessel with adequate capacity.
MAINS WATER FEED - CENTRAL HEATING:
There must be no direct connection to the mains water supply
even through a non-return valve, without the approval of the
Local Water Authority.
FILLING:
A method for initially filling the heating system is supplied with
the connection kit. The filling loop is connected between the
cold water inlet and the central heating flow connections, and
incorporates a non-return valve. To operate the filling loop, it
is necessary to open both quarter turn handles, once the
required pressure has been achieved, close both handles and
disconnect the hose in accordance with water byelaws. NOTE:
The installer should ensure that there are no leaks as
frequent filling of the heating system can lead to premature
scaling of the main exchanger and failure of hydraulic
components.
DOMESTIC WATER
The domestic water must be in accordance with the relevant
recommendation of BS 5546:1990. Copper tubing to BS EN
1057:1996 is recommended for water carrying pipe work and
must be used for pipe work carrying drinking water, a scale
reducer should also be used to reduce the risk of scale
forming in the domestic side of the heat exchanger.
UNDER FLOOR HEATING SYSTEMS:
In the event of an under floor heating system, fit a safety
thermostat on the boiler flow (see Section 2.10). This
thermostat should be positioned at a safe distance from the
boiler to ensure the correct operation of the same. If the
thermostat is positioned too close to the boiler, the water
remaining in the boiler after domestic hot water has been
drawn will flow into the central heating system and may cause
the thermostat contact to open without there being any real
danger of the system being damaged, this would lead to a
boiler shutdown both in D.H.W. mode and C.H. mode, and the
error code “E08” would be displayed; boiler operation resumes
automatically when the thermostat contact closes on cooling.
Should the thermostat fail to be installed as recommended, the
under floor heating system can be protected by installing a
thermostatic valve upstream from the thermostat in order to
prevent the flow of excessively hot water towards the system.
27/32 MFFI
27/32 RFFI SYSTEM
RESIDUAL HEAD OF THE BOILER
(mbar)
500
400
300
200
100
0
0
200
400
600
800
1000
1200 (l/h)
FIG. 2.5
11
WATER TREATMENT
The boiler is equipped with an aluminium alloy main 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 in an existing system, any
unsuitableadditives must be removed;
- Under no circumstances should the boiler be fired before
thesystem has been thoroughly flushed; the flushing
procedure must be in line with BS7593:1992.
We highly recommend the use of a flushing detergent
appropriate for the metals used in the aluminium alloy circuit.
These include (Fernox Superfloc, BetzDearborn Sentinel
X300 or X400 or Salamander System Cleanser), 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 the water to prevent premature
scaling of the main heat exchanger is necessary.
The formation of scale strongly compromises the efficiency of
the thermic exchange 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.
Demineralized 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 the metals used in the circuit including the
aluminium alloys.
The use of a corrosion inhibitor in the system such as Fernox
MB-1, BetzDeaborn Sentinel X100 or Copal Salamander
System Inhibitor is recommended to prevent corrosion
(sludge) damaging the boiler and systems;
- If anti-freeze substances are to be used in the system, check
carefully that they are compatible with the aluminium.
In particular, DO NOT USE ordinary ETHYLENE GLYCOL,
since it is corrosive in relation to aluminium and its alloy, as
well being toxic.
MTS suggests the use of suitable anti-freeze products such
as Fernox ALPHI 11, which will prevent rust and incrustation
taking place.
Periodically check the pH 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-floor systems, the use of plastic pipes without
protection against penetration of oxygen through the walls
can cause corrosion of the system’s 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
4726/4729. If pipes of this kind are not used, keep the
system separate byinstalling heat exchangers of those
with a specific system water treatment.
IMPORTANT
Failure to carry out the water treatment procedure
may invalidate the appliance warranty
12
2.9.
FLUE CONNECTIONS
FLUE SYSTEM
The provision for satisfactory flue termination must be made as
described in BS 5440-1.
The appliance must be installed so that the flue 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.
In cold or humid weather water vapour may condense on leaving the
flue terminal.
The effect of such “steaming” must be considered.
If the terminal is less than 2 metres above a balcony, above ground
or above a flat roof to which people have access, then a suitable
terminal guard must be fitted. When ordering a terminal guard,
quote the appliance model number.
IMPORTANT!!
BEFORE CONNECTING THE FLUE, ENSURE THAT
1
LITRE OF
WATER HAS BEEN POURED INTO THE EXHAUST CONNECTION TO
FILL THE CONDENSATE TRAP
(FIG.2.6).
SHOULD THE TRAP BE
EMPTY THERE IS A RISK OF FLUE GASSES ESCAPING INTO THE
ROOM.
A suitable terminal guard is available from:
TOWER FLUE COMPONENTS
Morley Road
Tonbridge
Kent TN9 1RA
The minimum acceptable spacing from the terminal to obstructions
and ventilation openings are specified in Fig. 2.7.
FIG. 2.6
FIG. 2.7
TERMINAL POSITION
ABCDEFGHIJKLMN-
27 MFFI
Coaxial
Systems
mm
Directly below an open window or other opening
Below gutters, solid pipes or drain pipes
Below eaves
Below balconies or car-port roof
From vertical drain pipes and soil pipes
From internal or external corners
Above ground or below balcony level
From a surface facing a terminal
From a terminal facing a terminal
From an opening in the car port
(e.g. door, window) into dwelling
Vertically from a terminal in the same wall
Horizontally from a terminal in the same wall
Horizontally from an opening window
Fixed by vertical flue terminal
Exhaust Type
300
75
200
200
75
300
300
600
1200
1200
1500
300
300
Maximum Extension Diameter
of Pipes
Exhaust/Air
(mm)
(m)
C13
4
Ø 60/100
C13, C33, C43
20 (S1=S2)
Ø 80/80
C53, C83
1+39 (S1+S2)
Ø 80/80
Twin Pipe
Systems
13
32 MFFI
Coaxial
Systems
Exhaust Type
Maximum Extension Diameter
of Pipes
Exhaust/Air
(mm)
(m)
C13
4
Ø 60/100
C13, C33, C43
24 (S1=S2)
Ø 80/80
C53, C83
1+48 (S1+S2)
Ø 80/80
Twin Pipe
Systems
In FIG. 2.8 (PAGE 11), several different types of flue systems are
shown.
For additional information regarding the flue accessories, please
consult the Flue Pipe Accessories manual.
FIG. 2.8
14
2.10.
ACCESSORY CONNECTION
IMPORTANT!!
Before carrying out any repairs to the appliance always
ensure that the external power supply has been isolated.
The boiler will remain live even when the ON/OFF knob is
in the “O”(off) position.
FIG. 2.9
In order to gain access to the external control connections, it is
first necessary to remove the casing (as shown in Section 3.2)
then proceed as follows:
1. Remove the cover of the main PCB box (FIG 2.9).
2. Access can now be gained to the following connector (see
Section 2.11):
CN10 - Safety thermostat for underfoor heating
CN 9 - Room Thermostat
CN 11 - Time clock
CN 6 - Interface PCB
SP
TA
FIG. 2.10
IMPORTANT!!
Only remove the links from SP and TA if they are to be
connected to external controls.
CR
SE
US
CN6
FIG. 2.11
CONNECTION OF ROOM THERMOSTAT OR EXTERNAL
TIME CLOCK
a. - Insert the thermostat cable through the cable grommet and
fasten it by means of the cable-clamp provided.
b. - Connect the thermostat wires to the terminal block
CN9 (Fig. 2.12 - Diagram A).
c.- If a remote time clock is to be fitted, disconnect the
integral time clock from the P.C.B. CN11
d. - Using a volt-free switching time clock, connect the
switching wires from the time clock following points 1-4
above (Fig. 2.12 - Diagram B).
e. - If using an external time clock and room thermostat,
these must be connected in series as points 1-7 above
(Fig. 2.12 - Diagram C).
CONNECTION OF INTERFACE PCB (optional)
The Interface PCB allows for the connection of:
REMOTE CONTROL - Clima Manager
External sensor
Secondaty outlet (*)
(*) = The secondary outlet can be used for the connection of the
following accessories:
- Zone valve
- LPG valve
- Secondary Pump
When connecting one of the above accessories it is
necessary to modify the E parameter on the Parameter
Menu (see Section 3.6.1)
FIG. 2.12
15
CN4
CN1
CN3
N
VG
CN2
CN5
7 8 9 10 1112
CI
AC
CN12
CN1
WFS
1
CN8
CN11
FUSE
NTC1
NTC2
FS
CN10
7 8 9 10 1112
CN6
CN9
NTC3
PA
CN7
CN12
O
P
CN8
Day
CN11
h
MV
CN5
L
CN16
N
1
L
2
12 11 10 9 8 7 6 5 4 3 2 1
1
2
Nr
Mr
Rs
Bn
Az
2
Bl
Mr
1
Rs
Nr
Mr
Bl
R/N
Mr
Bl
Nr
Nr
1
4
TIMER
1
Bl
Bl
1
Gr
Gr
Bn
Bn
Gr
1
Bn
Bn
2
3
FIG. 2.13
FUSE
Gr
Gr
Gr
1
FLOOR ROOM
16
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
TA
CN9
B
TS
CN10
CR
A
E
CN6
N
K
F
H
D
C
M
US
SE
L
I
N
ELECTRICAL DIAGRAM
Pr og
.
2.11.
The P.C.B. is fitted with 2 fuses, on the live and the
neutral.
The fuse holder contains:
- 5 x 20mm “3.15A Slow” glass fuses
m
Legend:
A
B
C
D
E
F
G
H
I
J
K
L
M
N
-
ON/OFF button
Multifunction display
RESET button
Green led (indicates burner on)
Comfort function yellow LED
Red LED (indicates lockout)
COMFORT button
Programming key +
Programming key Menù button
Central Heating temperature adjustment
Domestic Hot Water temperature adjustment
Eepron
Interface PCB (optional)
FS
NTC1 NTC2 NTC3 OP
VG
M
-
CI
MV
AC
PA
TA
TS
CR
SE
US
-
Domestic hot water flow switch
Central Heating flow temperature probe
Central Heating return temperature probe
Domestic Hot Water temperature probe
(mod. 27/32 MFFI)
Connection for boiler thermostat
(mod. 27/32 RFFI SYSTEM)
Time clock
Gas valve
Diverter valve (mod. 27/32 MFFI)
Connection for external diverter valve
(mod. 27/32 RFFI SYSTEM)
Circulation pump with automatic air release valve
Fan
Spark generator
Air pressure switch
Room Thermostat (optional)
Underfloor Heating Safety Thermostat (optional)
Remote Control (optional)
External sensor (optional)
Secondary outlet (optional)
CN1 = FAN
1: Start of coil (black)
2: End of coil (brown)
3: “Hall” sensor power supply 12V (red)
4: “Hall” sensor input (white)
5: “Hall” sensor neutral (blue)
6: Not used
CN2 =
FLAME SENSOR
CN3 =
Earth
CN4 = POWER SUPPLY
1: Live (brown)
2: Neutral (blue)
EQUIPMENT
CONNECTIONS
1: Gas valve neutral (blue)
2: Gas valve live (brown)
3: Not used
4: Pump (V1) live (red)
5: Pump (V2) live (black)
6: Pump (ON/OFF) live (brown)
7: Pump neutral (blue)
8: 3-way valve (D. H. W.) (brown)
9: 3-way valve (C. H.)(red/black)
10: 3-way valve Neutral (blue)
CN5 =
11: Spark generator Neutral (blue)
12: Spark generator live (black)
CN6 =
INTERFACE PCB
(OPTIONAL - see paragraph 2.10)
Accessories:
External sensor
Remote Control CLIMA MANAGER
Secondary outlet (see Section. 2.10)
CN7 = DISPLAY
1: Power 5V
2: Display return
3: Display transmission
4: Earth
CN8 = SENSOR CONNECTOR
1: Central Heating flow sensor (white)
2: Central Heating return sensor (white)
3: Not used
4: DHW flow switch (grey)
5: DHW sensor (grey)
6: Not used
7: Not used
8: DHW flow switch earth (grey)
9: DHW sensor earth (grey)
10: C.H. flow sensor earth (white)
11: C.H. return sensor earth (white)
12: Not used
CN9 = ROOM THERMOSTAT
(OPTIONAL - see paragraph 2.10)
CN10 = UNDERFLOOR HEATING
SAFETY THERMOSTAT
(OPTIONAL - see paragraph 2.10)
CN11 = TIME CLOCK
see paragraph 2.10
17
2.12. WATER CIRCUIT DIAGRAM
27/32 MFFI
20
1
2
3
4
5
6
19
18
7
8
9
17
16
10
15
14
11
12
13
FIG. 2.14
A
B
LEGEND:
1 Fan
Burner
2 Ignition/detection electrode
3 4 Air release valve
5 Main heat exchanger
Central heating flow temperature probe
6 Condensate Trap
7 Gas valve
8 9 Pressure gauge
Safety valve
10 Secondary heat exchanger
11 Domestic hot water temperature probe
12 13 Drain valve
18
C
D E
14
15
16
17
-
18 19 20 -
Domestic hot water flow switch
Motorised valve
Automatic By-pass
Circulation pump with automatic
air release valve
Expansion vessel
Central heating return temperature probe
Air pressure switch
27/32 RFFI SYSTEM
21
1
2
3
4
5
6
20
19
7
8
9
18
17
10
11
E
A
C
D
15
12
13
16
B
14
FIG. 2.14
LEGEND:
1 Fan
Burner
2 Ignition/detection electrode
3 4 Air release valve
5 Main heat exchanger
Central heating flow temperature probe
6 Condensate Trap
7 Gas valve
8 9 Pressure gauge
Safety valve
10 D.H.W. priority valve (Optional extra)
11 Non-return valve (integral to Jig Kit)
12 13 Filling loop (integral to Jig Kit)
14 Indirect cylinder expansion vessel
15
16
17
18
-
19 20 21 -
Expansion relief valve
Drain valve
Automatic By-pass
Circulation pump with automatic
air release valve
Expansion vessel
Central heating return temperature probe
Air pressure switch
19
3. COMMISSIONING
3.1.
INITIAL PREPARATION
initiative. Within the
MTS (GB) Limited support the
information pack you will find a copy of the
Log Book.
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 their
Log Book 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.
FILLING THE HEATING SYSTEM:
Remove the panels of the case and lower the control panel
(see section 3.2. for further information).
Open the central heating flow and return cocks supplied with
the connection kit.
Unscrew the cap on the automatic air release valve one full
turn and leave open permanently.
Close all air release valves on the central heating system.
Gradually open valve(s) at the filling point (filling-loop)
connection to the central heating system until water is heard to
flow, do not open fully.
Open each air release tap starting with the lowest point and
close it only when clear water, free of air, is visible.
Purge the air from the pump by unscrewing the pump plug
and also manually rotate the pump shaft in the direction
indicated by the pump label to ensure the pump is free.
Close the pump plug.
Continue filling the system until at least 1 bar registers on the
pressure gauge.
Inspect the system for water soundness and remedy any leaks
discovered.
FILLING OF THE D.H.W. SYSTEM:
Close all hot water draw-off taps.
Open the cold water inlet cock supplied with the connection kit.
Open slowly each draw-off tap and close it only when clear
water, free of bubbles, is visible
GAS SUPPLY:
Inspect the entire installation including the gas meter, test for
soundness and purge, all as described in BS 6891:1988.
Open the gas cock (supplied with the connection kit) to the
appliance and check the gas connector on the appliance for
leaks.
Water Treatment
The boiler is equipped with an aluminium alloy main 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 in an existing system, any
unsuitableadditives must be removed;
- Under no circumstances should the boiler be fired before
thesystem has been thoroughly flushed; the flushing
procedure must be in line with BS7593:1992.
We highly recommend the use of a flushing detergent
appropriate for the metals used in the aluminium alloy circuit.
These include (Fernox Superfloc, BetzDearborn Sentinel
X300 or X400 or Salamander System Cleanser), 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
20
the system the treatment of the water to prevent premature
scaling of the main heat exchanger is necessary.
The formation of scale strongly compromises the efficiency of
the thermic exchange 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.
Demineralized 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 the metals used in the circuit including the
aluminium alloys.
The use of a corrosion inhibitor in the system such as Fernox
MB-1, BetzDeaborn Sentinel X100 or Copal Salamander
System Inhibitor is recommended to prevent corrosion
(sludge) damaging the boiler and systems;
- If anti-freeze substances are to be used in the system, check
carefully that they are compatible with the aluminium.
In particular, DO NOT USE ordinary ETHYLENE GLYCOL,
since it is corrosive in relation to aluminium and its alloy, as
well being toxic.
MTS suggests the use of suitable anti-freeze products such
as Fernox ALPHI 11, which will prevent rust and incrustation
taking place.
Periodically check the pH 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-floor systems, the use of plastic pipes without
protection against penetration of oxygen through the walls
can cause corrosion of the system’s 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
4726/4729. If pipes of this kind are not used, keep the
system separate byinstalling heat exchangers of those
with a specific system water treatment.
IMPORTANT
Failure to carry out the water treatment procedure
may invalidate the appliance warranty
When the installation and filling are completed turn on the
central heating system (Section 3.4) and run it until the
temperature has reached the boiler operating temperature.
The system must then be immediately flushed through.
The flushing procedure must be in line with BS 7593:1992 Code
of practice for treatment of water in domestic hot water central
heating systems.
During this operation, we highly recommend the use of a central
heating flushing detergent (Fernox Superfloc or equivalent),
whose function is to dissolve any foreign matter that may be in
the system.
Substances different from these could create serious
problems to the pump or other components.
The use of an inhibitor in the system such as Fernox MB-1 or
equivalent is strongly recommended to prevent corrosion
(sludge) damaging the boiler and system.
Failure to carry out this procedure may invalidate the
appliance warranty.
21
3.2.
REMOVING THE CASING
A
To remove the front casing panel, follow these steps:
1. Remove the screws “A” (FIG 3.1);
2. Remove the four screws from case hooks (two at the top
and two at the bottom) and rotate anti-clockwise (FIG 3.2);
3. Lift and unhook the case panel (FIG 3.3).
A
FIG. 3.2
FIG. 3.1
FIG. 3.3
22
3.3.
CONTROL PANEL
27/32 MFFI
I
A
H
G
B
F
C
E
D
FIG. 3.4
Button
Description
Description
ON/OFF Switch
A
Green LED
(illuminated = burner on)
“COMFORT” Function Push-button
B
Time clock
C
Selector knob for Summer/Winter
Central Heating Temperature Adjustment Knob
D
Control Panel Cover
E
Domestic Hot Water Temperature Adjustment Knob
F
Heating System Pressure Gauge
G
“COMFORT” Function L.E.D
H
Red LED
(illuminated = boiler lockout)
I
Multi-function Display
Reset Button/
Flue Test**/ scroll through Functions Menu
Menu Switch
Programming “+” key
Programming “-” key
** IMPORTANT!!
The Flue Test function will cause the boiler to run continuously on
maximum power. This function must only be activated by an
authorised engineer.
23
27/32 RFFI SYSTEM
I
A
H
G
B
F
C
D
FIG. 3.4
Button
Description
Description
ON/OFF Switch
A
Green LED
(illuminated = burner on)
Heating only
B
Time clock
C
Selector knob for Summer/Winter
Central Heating Temperature Adjustment Knob
D
Control Panel Cover
F
Heating System Pressure Gauge
G
Heating only L.E.D
H
Red LED
(illuminated = boiler lockout)
I
Multi-function Display
Reset Button/
Flue Test**/ scroll through Functions Menu
Menu Switch
Programming “+” key
Programming “-” key
** IMPORTANT!!
The Flue Test function will cause the boiler to run continuously on
maximum power. This function must only be activated by an
authorised engineer.
24
3.4.
INITIAL START-UP
H
C
FIG. 3.6
1. Make sure that:
- the cap of the automatic air release valve is loosened;
- the system pressure is at least 1 bar on the
pressure gauge “F” (Fig. 3.4);
- the gas cock is closed (Fig. 3.5);
- the electrical connection has been carried
out in the correct manner.
To allow the air to escape from the system,
FIG. 3.5
proceed as follows:
- push the On/off button
and turn the
knob “C” (Fig. 3.6) to the “winter” position. The boiler pump will
start up and three consecutive attempts will be made to ignite
the burner. After the third attempt, the electronic system will
shutdown the boiler, because the supply of gas has been cut off.
The message “A01” will appear on the display and the red LED
“H” will illuminate;
- let the pump operate until all the air has escaped from the
system;
- repeat the procedure for bleeding the radiators of air;
- draw hot water for a short while;
- check the system pressure and, if it has gone down, fill it with
water until it returns to 1 bar.
2. Fill the boiler condensate trap with water, by pouring 1/2 a
litre of water into the exhaust flue connector (see fig. 3.7).
N.B. In the event of a prolonged period of system shutdown,
the condensate trap should be filled before any renewed
use. A shortage of water in the trap is dangerous because it
could possibly lead to a leakage of fumes into the air.
3, Ensure that the flue is filled correctly.
FIG. 3.7
4. Turn on the gas cock(fig. 3.8) and check the
seals on the connections, including the one
for the burner, making sure that the meter
does not signal the passage of gas. Check
the connections with a soap solution and
eliminate any leaks.
Fig. 3.8
5. Press the reset button
, the boiler will attempt to light.
If the burner does not light the first time, repeat the procedure.
Note: Should the boiler fail to ignite check that no air is present in
the gas pipe.
The boiler is configured in the factory for the gas type in
question. To check the air/gas ratio, please refer to section
3.6.4.
6. Complete the Benchmark log book.
25
3.5.
DISPLAY: MESSAGES SHOWN DURING
NORMAL OPERATION
During operation of the boiler, while it is carrying out its normal
operations, the left-hand display shows a series of characters that
refer to the operations indicated below:
- Diagnostics phase (precedes the other operations)
0
No request for heat
C
Heating
c
Pump overrun for heating
d
Domestic hot water
h
Pump overrun for domestic hot water
b
Storage cylinder(SYSTEM version)
The right-hand display (two-digit) shows:
- in CENTRAL HEATING mode: temperature of the Central Heating
system flow;
- in DOMESTIC HOT WATER mode: temperature of the Domestic Hot
Water (MFFI only).
LEFT
FIG. 3.9
26
RIGHT
3.6.
OPERATING PARAMETERS
The boiler has been designed to allow easy intervention with regard
to the operating parameters.
3.6.1
REGULATION MENU TABLE
Summary of the functions accessed when the RESET button
and the menu button
are pushed at the same time for
5 seconds.
On the display will appear the parameters indicated on table 3A.
To modify the parameters push the programming
keys
and
.
Fig. 3.10
TAB. 3A
left display
right display
function
factory setting
1
from 0 to 99
Soft light
as % of maximun Heating Power
60 (ACO 27 MFFI - RFFI SYSTEM)
43 (ACO 32 MFFI - RFFI SYSTEM)
2
from0 to 99
Maximun Heating Power (%)
55 (ACO 27 MFFI - RFFI SYSTEM)
52 (ACO 32 MFFI - RFFI SYSTEM)
3
from 0 to 7
Ignition delay (minutes)
02
4
Central heating maximun temperature
82
5
Central heating minimum temperature
42
6
P∆T rpm (Check of the temperature
difference between the flow and return
sensors for twelve seconds on initial
start-up)
45
t
fromS0 to S1
NOT USED
S0
F
fromO0 to 02
Boiler types
00 - ACO 27 /32 MFFI
02 - ACO 27/32 RFFI SYSTEM
e
from00 to 03
Secondary outlet function
p
from01 to 15 or CO Pump overrun (Central Heating)
00
02
c
from00 to 01
Comfort function (only model MFFI)
01
p
fromU0 to U1
Pump speed adjustment (modulating or
single speed)
U1
27
left-hand display
right-hand display
r
from00 to 01
p
from90 to 91
p6
from-20 to +20
Correction of heat curve translation
P5
from 0_3 to 3_0
Curve incline
t
A
Function
selects low temperature systems
or std systems
Temperature regulation controlled by
external sensor
factory setting
01
90
Test Function
81
Bus Address (Do not modify)
b0
Set-point second heating zone
b1
GSM value
b
20
NOT USED
b
30
NOT USED
b
40
NOT USED
b
50
NOT USED
b
60
NOT USED
b
70
NOT USED
Important!!
The parameters P5, P6 and P9 are only enabled when
the outdoor sensor is connected.
To return to the normal display, press the menu button
28
.
Soft light adjustment 1
The soft light can be adjusted between the maximum power
(shown on the display as “00”, i.e. 100%) and the minimum
power (shown on the display as “01”, i.e. 1%). The boiler is
factory set to a value which is suitable for the ignition with any
type of gas (approx. 33%).
The value set expressed as a percentage, can be displayed and
adjusted as indicated in Section 3.6.1 (parameter 1)
FIG. 3.11
Maximun Heating Power adjustment 2
The maximum heating power can be adjusted to between the
maximum power allowed by the boiler (24kW) and the minimum
power (8kW). The value is factory set to 70% of the maximum
power.
The value set (expressed as a percentage) canbe displayed and
modified as illustrated in Section 3.6.1 (parameter 2).
The display shows the value between 100% ("00" on the display)
and 1% ("01") of this interval.
FIG. 3.12
kW
25
Heat input
20
15
10
5
0
%
Display
Ignition Delay adjustment
FIG. 3.13
3
The ignition delay can be adjusted to between 0 and 7
minutes. The delay is factory set to 2 minutes.
The value set can be displayed and modified as illustrated in
Section 3.6.1 (parameter 3)
Maximun Central Heating temperature
4
This parameter allows the setting of the maximum temperature for
the central heating circuit. The value is factory set at 82°C and
can be adjusted as illustrated in Section 3.6.1 (parameter 4).
FIG. 3.14
Minimum Central Heating temperature
5
This parameter allows the setting of the minimum temperature for
the central heating circuit. The value is factory set at 42°C and
can be adjusted as illustrated in Section 3.6.1 (parameter 5).
FIG. 3.15
29
Boiler types
F
Factory setting:
00 - ACO 27 / 32 MFFI (C.H. + D.H.W.)
02 - ACO 27 / 32 RFFI SYSTEM (C.H. only)
THIS PARAMETER MUST NEVER BE ADJUSTED.
Secondary outlet Function E
(This parameter can be modified only with the
interface PCB connected)
With the interfa ce PCB connected, it is possible to set the boiler
to operate with one of the following accessories, (see Section
2.10 for further information). The setting can be varied by
pushing the
and
keys, the following options are available:
00
01
02
03
FIG. 3.16
zone valve - factory setting
LPG valve
seconday pump
NOT USED
PUMP OVERRUN
P
The pump overrun may be varied (after the burner has been turned
off) by pressing the programming keys
and
..
The following modes are available:
01
1 minute of pump overrun
03
3 minutes of pump overrun - factoy setting
06
6 minutes of pump overrun
09
9 minutes of pump overrun
12
12 minutes of pump overrun
15
15 minutes of pump overrun
CO
Continuous pump overrun
FIG. 3.17
Comfort Function (MFFI model) C
FIG. 3.18
K
D
The boiler allows the convenience level to be increased in the output
of domestic hot water by means of the “COMFORT” function. This
function keeps the secondary exchanger warm during the periods in
which the boiler is inactive, thereby allowing the initial water drawn to
be at a higher temperature.
The function may be activated by pressing the COMFORT button
key on the control panel (see section 3.3.). When the function is
active, a yellow light “K” comes on, again located on the control
panel.
The comfort function can be activated or deactivated by pressing
the
and
keys
00 Comfort function deactvated
01 Comfort function active for 30 minutes - factory setting.
It is possible to deactivate the comfort function by pressing the
button
.
The yellow LED “K” will go out.
N OTE : During the overrun period of the pump, the “COMFORT”
function, if selected, is temporarily deactivated. The L.E.D. light
remains on to indicate that the boiler will return to the “COMFORT”
mode once the pump overrun has finished.
Pump Speed Adjustment P
By pressing the
and
keys it is possible to adust the
operation of the pump, the two options are as follows:
U0 - Single Speed Pump
U1 - Modulating Pump - factory setting
FIG. 3.19
30
SETTING THE TEMPERATURE FIELD r
Using the programming keys
and
it is possible to make the
following adjustments:
00” signifies that the flow temperature (which may be set by
“0
means of the knob on the front control panel) may be
regulated from 20 to 75°C.
01” signifies that the flow temperature (which also may be set by
“0
means of the knob on the front control panel) may be
regulated from 42 to 82 °C.
FIG. 3.20
TEMPERATURE REGULATION CONTROLLED BY THE
EXTERNAL SENSOR P
(Only enabled when the outdoor sensor is installed)
it is possible to make the following
By pressing the
and
adjustments:
90” Temperature regulation controlled by the external sensor is
“9
inactive (not installed).
91” Temperature regulation controlled by the external sensor is
“9
active (installed).
FIG. 3.21
Adapting the heat curve “P 6”
(Only enabled when an outdoor sensor is installed)
To adapt the heat curve to the system requirements, set
parameter “P 6” in order to shift the curve in parallel, so that
the flow temperature calculated is changed, along with the
ambient temperature.
When “P 6” appears on the left-hand display, use the
heating control knob to shift the curve in parallel as
illustrated in the figure below. The shift value can be read
on the right-hand display, from -20 to +20.
FIG. 3.25
FIG. 3.26
Flow temperature (°C)
100
-20
60
6
l
lle
ara
np
+20
to
rea
inc
se
th
ei
ur v
c
e
n
20
to
+20
a
cre
de
t
se
h
ei
ur v
c
e
lel
ral
a
p
External temperature (°C)
-20
+20
-20
31
SETTING THE CURVE INCLINE P 5
FIG. 3.22
FIG. 3.23
WARNING
(*) - If curve 0_3 or 0_5 is set, a system
safety thermostat must be connected to
the main terminal board (see paragraph
2.10)
With parameter P 5 it is posslbe to adjust the heat curve
setting to those shown in fig. 4.16). Using programming keys
and
, the curve setting may be changed. The possibility of
setting curves varies according to parameter r:
r = 00 (low temperature range) from curve 0_3 to 0_5 (underfloor
systems only)
r = 01 (high temperature range) from curve 1_0 to 3_0.
Flow
temperature
(°C) della caldaia [°C]
temp.
di mandata
(Only enabled when an outdoor sensor is installed)
When using an outdoor sensor, the microprocessor-controlled P.C.B.
calculates the most suitable flow temperature, taking into account
the exter nal temperature and the type of system. The
microprocessor is capable of doing this because it is possible to
establish a link between the external temperature and the flow
temperature of the Central Heating system water. This link translates
into a "thermal curve".
The type of curve should be chosen in correspondence with the
planned temperature of the system and the nature of the heat loss
present in the building.
3
100
2
80
1,5
1,2
60
1
40
0,5
0,3
20
20 16 12
FIG. 3.27
8
4
0
-4 --8 --12 --16
External
temperature
(°C)
temp. esterna
[°C]
Test Function
max power Central Heating
Fig. 3.24
2,5
t
The P.C.B. allows the boiler to be forced to the maximum or
minimum power. Enable the test function and OO will appear on
the right-hand display (see Fig. 3.8).
To select operation at maximum power, press the programming
, two dashes will appear at the top of the right-hand
key
display (see Fig. 3.9).
This function is disabled when you press reset key to quit the
adjustments menu.
To select operation at minimum power, press the programming
, two dashes will appear at the bottom of the right-hand
key
display (see Fig. 3.10). This function is disabled when you press
reset key “H” to quit the adjustments menu.
max power DHW
FIG. 3.28
minimum power
FIG. 3.29
32
Note: The boiler can be forced to the maximum and minimum
power even without enabling the test function via the
adjustments menu:
a - by pressing the Reset key for 5 seconds, the boiler is
automatically forced to test mode and t-- will be displayed,
the boiler is now in the test mode for the maximum heating
power, to force the boiler to maximum output for hot water it
is necessary to press the
and
keys together, two
dashes appear at the top of the right-hand display (see Fig.
3.9). This function is disabled by pressing the reset key .
b - by pressing the
key, the boiler is forced to operate at
minimum power, two dashes appear at the bottom of the
right-hand display (Fig. 3.10). This function is disabled by
pressing the reset key.
3.6.2
SETTINGS DISPLAY
The boiler is designed to monitor some operating variables and
settings by means of the display on the front control panel. Keeping,
at the same time, the reset and the menu key pressed for over 10
seconds will allow access to the “readout” function of the main
system variables. By pressing the reset button repeatedly after that,
it is possible to read the following information in sequence:
Indication on the
left-hand display
Value read on right-hand display
U/1
Flow temperature of the Central Heating circuit (°C)
U/2
Return temperature of the Central Heating circuit (°C)
U/3
Domestic Hot Water output temperature (°C)
U/4
Outdoor temperature (°C)*
U/5
Exaust Fume temperature
U/6
Fan speed (% rpm)
E
Last safety shut-off (see section 3.7.)
A
Last shutdown (see section 3.7.)
To return to the normal display, press the menu key.
The boiler will automatically retun to the normal display after no
buttons have been pressed for 2 minutes.
U” and “1
1” blink alternately on the display
NOTE 1: U/1 means that “U
00” on the display
NOTE 2: the value 100% appears as “0
* = Only displated when an external sensor is fitted.
33
3.6.3 GAS REGULATION CHECK
Supply pressure check
1. Loosen screw “1” (Fig. 3.31) and conect the pressure gauge
connection pipe into the test point.
2. Turn the boiler on at maximum power, enabling the “flue
sweep” function (press the RESET key for 5 seconds and
press the programming keys + and - together). The supply
pressure should correspond to that shown for the type of gas
the boiler is designed for methane gas G20.
3. When the check is over, tighten screw “1” and make sure it is
securely in place.
4. Disable the test mode by pressing the reset key.
FIG. 3.30
AIR/GAS RATIO CHECK
4
3
Air/gas ratio at minimum power
To check the air/gas ratio at minimum power, proceed as follows:
1. Connect the combustion analyser to the analysis point (Fig.
3.30) after removing the cover plate.
2. Turn the boiler on at minimum power via the test function
(see paragraph 3.6.1) or by pressing RESET key for 5
seconds and the programming key - on the control panel.
Ensure the CO2 value on the analyser corresponds with the
value indicated in table 4D. If this is not the case, adjust
screw “2” (Fig.3.31) with a screwdriver, after removing the
cap, until you obtain the correct CO 2 reading. Allow the
reading to become stable for at least 4 minutes.
3. When the check is over, replace the cap on screw “2” (Fig.
3.31).
4. Disable operation at minimum power by pressing the RESET
key.
2
1
2
3
4
1
FIG. 3.31
SUPPLY PRESSURE
G20 methane
17-25 mbar
AIR/GAS RATIO SETTING
Calibration values check
CO2 at maximum power
after 4 minutes of operation
methane G20
% vol
8,7 ±0.2
% vol
9,2 ±0.2
AIR/GAS RATIO SETTING
Calibration values check
CO2 at minimum power
after 4 minutes of operation
methane G20
34
Air/gas ratio at maximum power
To check the air/gas ratio at maximum power, proceed as
follows:
1. With the combustion analyser already connected to the
analysis point, set the boiler to maximum power via the test
function (see paragraph 3.6.1) or enabling the “flue sweep
function” by pressing the RESET key for 5 seconds and the
programming keys + and -.
Ensure the CO2 value on the analyser corresponds with the
value indicated in table 4D. If this is not the case, adjust
screw “4” with a screwdriver (Fig. 3.31), until you obtain the
correct CO2 reading. Allow the reading to become stable for
at least 4 minutes.
2. Disable the test mode by pressing the RESET key.
The test mode is automatically disabled after 5 minutes.
3. Repeat the air/gas ratio at minimum power check (see
above).
4. Disconnect the analyser, remount the cover plate and check
it is securely in place.
3.6.4 IGNITION DELAY ADJUSTMENT
The ignition delay can be adjusted to between 0 and 7 minutes.
The delay is factory set to 2 minutes.
The value set can be displayed and modified as illustrated in
paragraph 3.6.1 (parameter 3).
3.6.5 ADJUSTING THE MAXIMUM HEATING POWER
The maximum heating power can be adjusted to between the
maximum power allowed by the boiler (24 kW) and the minimum
one (8 kW). The value is factory set to 70% of the maximum
power.
The value set (expressed as a percentage) can be displayed
and modified as illustrated in paragraph 3.6.1(parameter 2).
3.6.6 SOFT LIGHT ADJUSTMENT
The soft light can be adjusted between the maximum power
(shown on the display as "00", i.e. 100%) and minimum power
(shown on the display as "01", i.e. 1%). The boiler is factory set
to a value which is suitable for ignition with any type of gas
(approx. 33%).
The value set (expressed as a percentage) can be displayed
and modified as illustrated in paragraph 3.6.1 (parameter 1).
3.7 CHANGING THE TYPE OF GAS
Initially the ACO boiler is only available for use with
methane Gas (G20).
35
3.8.
BOILER SAFETY SYSTEMS
There follows a list of the shutdown modes and the respective
codes shown on the display.
A” type): if such a situation occurs, it is necessary to
Shutdown (“A
reset the boiler using the appropriate key. If this shutdown
occurs frequently, your local Service Agent should be contacted.
DISPLAY
-
SAFETY SHUTDOWN:
for this group of errors
E”) the situation
(characterised on the display by the letter “E
is automatically removed as soon as the cause behind it is
resolved.
As soon as the origin of the shutdown disappears, the boiler
starts up again and returns to its normal operation.
-
SHUTDOWN: (characterised on the display by the letter
A”), is not removed unless a manual intervention is made.
“A
The boiler may return to operation only if reset by pressing
the RESET button located at the centre of the display.
Safety shutdown: In the event that a safety shutdown occurs, it is
necessary to contact an Authorised Service Centre.
DISPLAY
CAUSE
A01
Too many attempts to ignite on starting up
E 04
Domestic hot water temperature probe
in open circuit
A02
No water or no water circulation in central
heating system
E 05
Domestic hot water temperature probe
in short circuit
A03
The heating flow temperature exceeds 105°C
during operation
E 06
Heating flow temperature probe in open circuit
A07
Too many failures to flame in one period
during operation
E 07
Heating flow temperature probe in short-circuit
A33
Problem with the fan
E 08
Heating return temperature probe
in open circuit
A97
Problem with the electronic monitoring
E 09
Heating return temperature probe
in short-circuit
A98
Problem with the electronic monitoring
E 10
Under floor heating temperature probe
in open circuit
A99
Problem with the electronic monitoring
E 20
Flame detected with gas valve closed
E 30
Outdoor sensor open circuit
E 31
Outdoor sensor in short circuit
E 33
Fan operation sensed with no demand for
central heating or domestic hot water
E 34
Fan operation but air pressure switch
does not close
E 80
Remote Control CLIMA MANAGER room
sensor in open circuit or short circuit
E 94
Problem within the electronic system
E 95
Error reading flow or return temperature probe
E 99
Problem within the electronic system
NOTE:
36
CAUSE
The boiler is protected from malfunctioning by means of internal
checks by the P.C.B., which brings the boiler to a stop if
necessary.
In the event of the boiler being shut off in this manner, a code
appears on the display which refers to the type of shut-off and
the reason behind it.
There are two types of shut-off:
When there is no ignition, check that the gas cock is open.
DAILY TEST.
In order to prevent the shutdown of the components, the
boiler carries out a self-diagnosing test every 21 hours: the
pump turns on for 15 seconds and the diverter valve moves.
ANTI-FROST DEVICE.
The anti-frost function acts on the central heating flow
temperature probe, independently from other regulations, when
the board is turned ON.
If the primary circuit temperature falls below 8°C the pump will
for 2 minutes.
After the two minutes of circulation (fixed) the boiler will check
the following:
a) if the central heating flow temperature is > 8°C, the pump
stops;
b) if the central heating flow temperature is between 3 and 8°C,
the pump will run for another two minutes;
c) if the central heating flow temperature is < 3°C, the burner will
fire (heating position) at minimum power until the temperature
reaches 33°C, the burner will go out and the pump will continue
to run for two minutes.
If the flow temperature remains between 3-8°C the pump will
continue to run for two minutes for a maximum of 10 times
unless a temperature above 8°C is detected in the central
heating flow, after this the the burner will fire.
If lockout is caused by overheat the burner is kept OFF.
NOTE: In all cases, the circulation takes place in the central
heating system.
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.
ANTI-SCALE DEVICE.
When producing domestic hot water, the burner shuts off
whenever the output temperature of the hot water exceeds
61°C or the flow temperature of the primary circuit exceeds
78°C. It will not turn on if the temperature of the primary
circuit is greater than 78°C.
3.9.
COMBUSTION ANALYSIS
3.10
COMPLETION
For the Republic of Ireland it is necessary to complete a
“Declaration of Conformity” to indicate compliance to I.S. 813.
An example of this is given in the current edtion of I.S. 813. In
Log Book.
addition it is necessary to complete the
3.11
DRAINING
The draining of the heating system must be carried out as
follows:
- Turn off the boiler and the bipolar switch;
- Loosen the automatic air release valve;
- Open the system's discharge valve and gather the water
that comes out in a container;
- Empty out from the lowest points of the system (where
provided).
If the system is to be left active in areas where the room
temperature may go below 0°C during winter, it is recommended
that anti-freeze liquid be added to the water in the heating
system in order to avoid the need for repeated draining.
The boiler is designed to allow for easy analysis of the products
of combustion.
Using the flue analysis points, it is possible to detect the
temperature of the bur nt gas, the combustion air, the
concentrations of O2, CO2, etc.
To access these points, unscrew the front screw and
remove the metal plate and seal.
T h e b e s t t e s t c o n d i t i o n s, w i t h t h e m a x i m u m h e a t i n g
power, are achieved when the FLUE SWEEP FUNCTION
is enabled (press the RESET KEY for 5 seconds and the
p r o gra m m i n g key s + a n d - ) . T h e b o i l e r w i l l r e t u r n t o
normal operating conditions automatically after 5 minutes,
or if you press the reset key. When you have finished,
reposition the metal plate correctly and make sure the
seal fits perfectly.
Draining the domestic hot water system
Every time that there is a danger of freezing, the domestic hot
water system must be drained as follows:
- close the water mains stop-cock;
- open all the hot and cold water outlets;
- empty out from the lowest points (where provided).
37
4. ZONE VALVES
The boiler is capable of managing a heating system that uses zone
valves. The electrical connection of these valves is carried out by
means of the appropriate ter minal board (indicated in the
“ELECTRICAL CONNECTION” section).
By way of example, two possible types of systems would be:
1. System with 2 valves with independent regulation of the zones
(day and night).
2. System with 1 valve (regulation of the night zone subordinated
to that of the day).
A possible set-up for the first type of system is as follows:
CR
VZ1,2
TA
F,N
RL
= remote control
= zone valve 1 and 2
= room thermostat or timer-thermostat
= radiators
= electrical connection (live and neutral)
= relay
A possible set-up for the system with a single zone valve is as
follows:
This set-up is simpler and more economical because it does not
involve the use of the special relay. The night zone, however, may
only be heated during the time periods in which the remote control
timer gives consent to the heating of the day zone. Example:
•
day zone programming (remote control): 8:00 - 22:00
•
night zone programming (timer-thermostat): 20:00 - 22:00
38
5. MAINTENANCE
5.1.
GENERAL REMARKS
IMPORTANT!!
Every time that the combustion chamber cover or the
primary heat exchanger is removed from the boiler, the
combustion chamber seal must be replaced (code:
65102217). The silicone grease provided with the
gasket must be spread around the area the gasket fits
to ensure an airtight seal.
Only the grease provided must be used, however,
should more grease be needed it must have a
temperature range of between –40 deg C and +200
deg C”
5.2.
CLEANING THE PRIMARY EXCHANGER
IMPORTANT!!
Every time that the combustion chamber cover or the
primary heat exchanger is removed from the boiler, the
combustion chamber seal must be replaced (code:
65102217). The silicone grease provided with the
gasket must be spread around the area the gasket fits
to ensure an airtight seal.
Only the grease provided must be used, however,
should more grease be needed it must have a
temperature range of between –40 deg C and +200
deg C”
5.3.
CLEANING THE CONDENSATE TRAP
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 group and, if necessary, replace the
gaskets and restore the seal to perfect working order.
2. Check the seals in the gas group and, if necessary, replace
the gaskets and restore the seal to perfect working order.
3. Visually check the overall state of the boiler.
4. Visually check the combustion and, if necessar y,
disassemble and clean the burner.
5. Following inspection 3, disassemble and clean the
combustion chamber, if necessary.
6. Following inspection 4, disassemble and clean the injector, if
necessary.
7. Clean the primary heat exchanger (see section 6.2)
8. Regulate the correct rate of flow of the gas: rate of flow on
ignition, partially loaded and at maximum load.
9. Check the correct functioning of the heating safety devices:
- temperature limit safety device.
10. Check the correct functioning of the gas group safety
devices:
- absence of gas or flame safety device (Ionisation).
11. Check that the electrical connections are correct (in
conformity with the instructions manual).
12. Check the efficiency of the production of domestic hot water
(test the rate of flow and temperature).
13. Carry out a general inspection of the functioning of the boiler.
14. Check the characteristics for expulsion of the products of
combustion.
15. Remove the oxide from the detection electrode by means of
an emery cloth.
CLEANING THE EXHAUST SIDE
Remove the combustion chamber inspection hatch (see section
6.3.5). Check that the exhaust passages between the blades of
the block are free; if there are deposits present, wash the blades
with compressed air, water or a vinegar-based detergent.
NOTE: it is possible to use a brush in order to mechanically
remove the residues.
Use of detergents:
soak the blades well
allow the detergent to act for about 20 minutes
rinse with a strong jet of water to remove the deposits (the
control panel must be kept closed)
make sure that there are no traces of detergents in the
exchanger.
CLEANING THE WATER SIDE
Use detergents that dissolve CaCO3. Leave to act for a short
time (in order not to damage the aluminum) and then rinse.
Make sure that the detergent does not remain inside the
exchanger.
Unscrew the lower part of the condensate trap and clean it.
Lastly, fill it with water and replace the stopper.
NB: if the boiler is not to be used for a prolonged period, the
condensate trap should be filled before igniting it again. A
shortage of water in the trap is dangerous because there is the
risk of exhaust fumes escaping into the air.
5.4.
OPERATIONAL TEST
After having carried out the maintenance operations, fill the
heating circuit to a pressure of approx. 1.5 bar and release the
air from the system. Also fill the domestic hot water system.
Place the boiler in operation.
If necessary, release the air again from the heating system.
Check the settings and the correct functioning of all the
control, regulation and monitoring parts.
Check the seal and the correct functioning of the system for
expelling fumes/drawing of combustion air.
Check that the boiler ignites properly and carry out a visual
check on the burner flame.
39
7.
7.1.
FAULT FINDING
FAULT FINDING GUIDE
(FLOW-CHARTS)
It is possible to detect and correct any defect by using the standard fault
finding diagrams described in this chapter.
Model 27/32 MFFI
MAKE SURE THAT:
1. There is sufficient water in the system
2. The gas is turned on
3. The electrical supply is turned on
PRESS THE ON/OFF BUTTON
TO THE ON POSITION
NO
IS THE
DISPLAY ON?
YES
TABLE
I and II
DOES AN ERROR CODE
APPEAR ON THE DISPLAY?
1. Check the fuses
2. Check the power supply to
the control panel
3. Check/replace the
ON/OFF button
4. Check the connection between
the main and display P.C.B.s
5. Check/replace the
main and display P.C.B.s
NO
WINTER
SUMMER
COMFORT
SELECTOR ON/OFF:
yellow L.E.D . on
NO:
COMFORT OFF
YES: COMFORT ON
YES: COMFORT ON
Flow
temperature
<36C
YES
YES
NO
NO
NO
Flow
temperature
>42C
YES
YES
D.H.W.
IS BEING
DRAWN?
NO:
COMFORT OFF
Flow
temperature
<36C
NO
Flow
temperature
>42C
COMFORT
SELECTOR ON/OFF:
yellow L.E.D. on
YES
YES
NO
D.H.W.
IS BEING
DRAWN?
NO
YES
IS THE
THE TIME CLOCK
AND/OR ROOM THERMOSTAT
BE ACTIVATED?
NO
BUILT-IN
ELECTRONIC
ANTI-FROST DEVICE:
Is there a condition for it to be active?
(flow temp between 3C & 8C)
- PC0 continuous pump
operation selected on
menu
YES
YES
NO
BUILT-IN
ELECTRONIC
ANTI-FROST DEVICE:
Is there a condition for it to be active?
(flow temp between 3C & 8C)
- PC0 continuous pump
operation selected on
menu
NO
THERE IS NO CALL FOR PUMP OPERATION
THERE IS NO CALL FOR PUMP OPERATION
A
55
Model 27/32 RFFI SYSTEM
MAKE SURE THAT:
1. There is sufficient water in the system
2. The gas is turned on
3. The electrical supply is turned on
PRESS THE ON/OFF BUTTON
TO THE ON POSITION
NO
IS THE
DISPLAY ON?
YES
TABLE
I and II
DOES AN ERROR CODE
APPEAR ON THE DISPLAY?
1. Check the fuses
2. Check the power supply to
the control panel
3. Check/replace the
ON/OFF button
4. Check the connection between
the main and display P.C.B.s
5. Check/replace the
main and display P.C.B.s
NO
WINTER
SUMMER
COMFORT
SELECTOR ON/OFF:
yellow L.E.D . on
NO:
COMFORT OFF
YES: COMFORT ON
YES: COMFORT ON
Flow
temperature
<36C
YES
YES
NO
NO
NO
Flow
temperature
>42C
YES
YES
D.H.W.
IS BEING
DRAWN?
NO:
COMFORT OFF
Flow
temperature
<36C
NO
Flow
temperature
>42C
COMFORT
SELECTOR ON/OFF:
yellow L.E.D. on
YES
YES
NO
D.H.W.
IS BEING
DRAWN?
NO
YES
IS THE
THE TIME CLOCK
AND/OR ROOM THERMOSTAT
BE ACTIVATED?
NO
BUILT-IN
ELECTRONIC
ANTI-FROST DEVICE:
Is there a condition for it to be active?
(flow temp between 3C & 8C)
- PC0 continuous pump
operation selected on
menu
YES
YES
NO
NO
THERE IS NO CALL FOR PUMP OPERATION
THERE IS NO CALL FOR PUMP OPERATION
A
56
BUILT-IN
ELECTRONIC
ANTI-FROST DEVICE:
Is there a condition for it to be active?
(flow temp between 3C & 8C)
- PC0 continuous pump
operation selected on
menu
A
IS THE
PUMP RUNNING?
NO
YES
POWER TO
THE PUMP?
YES
WAS THE
PLAUSIBILITY TEST
OK? (E95: test failed)
YES
NO
NO
1. Check/replace pump cable
Release/Replace pump
1. Check the pump cable
2. Check/replace the pump
3. Check/replace the NTC
probes
4. Replace the main P.C.B.
B
57
B
NO
IS THE FAN
RUNNING?
DOES CODE
A33 APPEAR?
YES
NO
Replace
the main P.C.B.
DOES THE
AIR PRESSURE SWITCH
CLOSE? (E33)
YES
1. Check the fan cable
2. Replace the fan
3. Replace the main P.C.B.
NO
1. Check the exhaust flue duct
2. Check the APS cable
3. Check if there is condensate in the silicone pipes
4. Check/Replace the APS
5. Check/Replace the main P.C.B.
YES
ARE IGNITION
SPARKS GENERATED
REGULARLY?
NO
1. Check/replace ignition
electrode
2. Check ignition cable
3. Check/replace the main P.C.B.
YES
IS THE BURNER
ALIGHT?
1. Check the power supply
of the gas valve.
2. Check for an air
pressure signal
3. Check the gas pressure
on the burner
4. Check the soft-light
adjustment
5. Replace the gas valve
6. Check/replace the
main P.C.B.
NO
YES
WAS
THE FLOW TEST
SUCCESSFULL?
NO
BOILER HAS
SHUTDOWN?
(A02 TEST FAILED)
YES
IS
THERE STILL
A PROBLEM?
NO
NORMAL
OPERATION
58
YES
1. Check pump cable
2. Check/replace the pump
3. Check NTC probes cables
4. Check/replace NTC probes
5. Check/replace main P.C.B.
YES
1. Table III
1. Table II
2. Press RESET
NO
8.
27/32 MFFI
SHORT SPARE PART LIST
61 60 4
1
2
3
4
5
59
5
62
6
7
8
6
63
64
58 57 56 55
54
53
52
59
133 134
135
132
65
9
136
131
10
11
130 129
66
137
128
126
12
67
123
124
122
119
120
125
127
125
121
122
121
51
RESET
ON/OFF
8
7
6
63
75
108
113
74
73
50
107
112
72
14
116
115
114
117
70
71
CONFORT
6
68
69
13
118
64
108
76
90
88
109
111
91
77
106
15
79
80
105
88
78
16
49
110
17
81
18
19
19
82
20
98
90
88
83
48
47
102
101
46
97
48
103
91
45
84
47
21
92
89
85
22
23
25 26 27
28 29
30
82
31
32
98
99
44
97
94
95
87
86
24
100
93
88
104
96
33 34
35
43
36
36 37 38
39
40
41
42
cod. 65102191
216
215
201
202
214
213
RESET
ON/OFF
CONFORT
212
203
M
211
210
205
204
209
208
205
207
206
59
Key
no.
1
10
14
18
21
22
29
31
32
35
37
42
46
54
55
75
90
91
101
107
107
126
130
132
136
136
203
204
215
216
60
G.C. part
no.
Description
Flue restrictor
Spark generator
Main P.C.B.
Secondary heat exchanger
Temperature probe (DHW)
Manifold (CH Return)
Safety valve (3bar)
Pressure gauge
Gas valve
Flow switch (DHW)
Motor (3-way valve)
Pump
Automatic air vent
Expansion vessel
Air pressure switch
Hose clip
Retaining clip (NTC CH)
NTC (CH)
Repair kit (3-way valve)
Main exchanger (27 KW)
Main exchanger (32 KW)
Ignition electrode
Detection electrode
Fan
Burner (27kW)
Burner (32kW)
Cable (Time Clock)
Time Clock
Display P.C.B.
Cable (Display P.C.B.)
ARISTON
Part. No.
65102197
65102177
65102236
990685
998458
990384
997088
65102220
65102247
995948
997147
65102253
995865
995940
65102232
990632
65101007
990405
65101288
65102233
65102260
65102198
65102199
65102248
65102181
65102180
65102188
999599
65102235
65102185
27/32 RFFI SYSTEM
59 58 4
1
2
3
4
5
5
60
6
7
8
56 55 54 53
57
6
61
62
51
50
57
119 120
121
118
63
9
52
122
117
10
11
116 115
64
123
114
112
12
65
109
110
108
105
106
111
113
111
107
108
107
49
RESET
ON/OFF
8
7
6
62
61
103
68
13
72
99
73
48
93
94
74
71
14
94
98
70
69
102
101
100
6
66
67
104
95
97
85
29
86
75
92
77
78
91
29
76
15
47
96
16
46
45
17
18
90
85
29
44
46
79
80
45
43
89
84
81
33
34
86
19
42
20
22 23 24
25 26
27
28
41
87
88
83
82
21
29
30
31
32
33 34 35
36
37
38
39
40
code 65102299
217
216
201
202
215
214
RESET
ON/OFF
212
213
203
M
211
205
204
210
205
209
208
207
206
61
Key
no.
1
10
14
42
26
28
31
40
44
52
53
75
85
86
93
93
112
116
118
122
122
203
204
216
217
62
G.C. part
no.
Description
Flue restrictor
Spark generator
Main P.C.B.
Manifold (CH Return)
Safety valve (3bar)
Pressure gauge
Gas valve
Pump
Automatic air vent
Expansion vessel
Air pressure switch
Hose clip
Retaining clip (NTC CH)
NTC (CH)
Main exchanger (27 KW)
Main exchanger (32 KW)
Ignition electrode
Detection electrode
Fan
Burner (27kW)
Burner (32kW)
Cable (Time Clock)
Time Clock
Display P.C.B.
Cable (Display P.C.B.)
ARISTON
Part. No.
65102196
65102177
65102236
65102305
997088
65102220
65102247
65102253
995865
995940
65102232
990632
65101007
990405
65102233
65102260
65102198
65102199
65102248
65102181
65102180
65102188
999599
65102235
65102185
63
Merloni TermoSanitari SpA - Italy
Commercial subsidiaries:
MTS (GB) LIMITED
MTS Building
Hughenden Avenue
High Wycombe
Bucks HP13 5FT
Telephone: (01494) 755600
Fax: (01494) 459775
Internet: www.mtsgroup.com/uk
E-mail: [email protected]
Technical Advice: 0870 241 8180
MTS Heating Limited
Damastown Industrial Park
Damastown Avenue
Mulhuddart
Dublin 15
Telephone: (01) 810 3723
Fax: (01) 810 3727
Internet: www.mtsgroup.com/ie
E-mail:[email protected]
Technical Advice: (01) 437 0121
Customer Service: 0870 600 9888
Customer Service: (01) 437 0121
099841832211
Manufacturer:
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