SERIES
Installation and
Servicing
Instructions
Type C Boilers
G.C.N: 47-116-34
G.C.N: 47-116-35
G.C.N: 47-116-09
G.C.N: 47-116-10
LEAVE THESE
INSTRUCTIONS WITH THE
END-USER
Country of destination: GB/IE
TABLE OF CONTENTS
1. GENERAL INFORMATION
1.1. GENERAL INFORMATION
1.2. TECHNICAL INFORMATION
1.3. OVERALL VIEW
2. INSTALLATION
2.1. REFERENCE STANDARDS
2.2. SITING
2.3. OVERALL DIMENSIONS
2.4. MINIMUM CLEARANCES
2.5. MOUNTING
2.6. ELECTRICAL CONNECTION
2.7. GAS CONNECTION
2.8. WA
2.9.
LUE CONNECTIONS
F
2.10. ACCESSORY CONNECTION
2.11.
LECTRICAL
E
2.12. WATER CIRCUIT DIAGRAM
COMMISSIONING
3.
3.1. INITIAL PREPARATION
3.2. REMOVING THE CASING
3.3. CONTROL PANEL
3.4. INITIAL STA RT-UP
3.5. DISPLAY:MESSA
NORMAL OPERA
3.6. OPERATING PARAMETERS
3.6.1. REGULATION MENU TABLE
3.6.2. SETTINGS DISPLA
3.6.3. GAS REGULATION CHECK
3.6.4. IGNITION DELAY ADJUSTMENT
3.6.5. ADJUSTING THE MAXIMUM HEATING POWER
3.6.6. SOFT LIGHT ADJUSTMENT
3.7. CHANGING THE TYPE OF GAS
3.8. BOILER SAFETY SYSTEMS
3.9. COMBUSTION ANALYSIS
3.10. COMPLETION
3.11. DRAINING
THE
CONNECTIONS
TER
APPLIANCE
THE
DIAGRAM
APPLIANCE
SHOWNDURING
GES
TION
Y
6. SERVICING INSTRUCTIONS
6.1. REPLA
CEMENT OF
6.2. TO GAIN GENERAL ACCESS
6.3. ACCESS TO THE COMBUSTION CHAMBER
6.3.1. REMOVING THE FAN
6.3.2.
6.3.3.
6.3.4.
6.3.5. REMO
6.3.6. REMO
6.3.7. R
6.4. ACCESS
6.4.1. REMO
6.4.2. REMO
6.5. ACCESS
6.5.1.
EMOVING THE AIR PRESSURE SWITCH
R
EMOVING THE BURNER
R
EMOVING THE ELECTRODES
R
VING THE
VING THE
EMO
VING THE
TO THE
VING THE
VING THESPARK
TO THEWATER
R
VING THE
EMO
(S
ECOND
ARY
6.5.2. REMOVING THE SAFETY VALVE
6.5.3. REMOVING THE AUTOMATIC AIR VENT
6.5.4. REMOVING THE DIVERTER VALVE ACTUATOR
6.5.5. REMOVING THE DHW FLOW SWITCH
(MFFI ONLY)
R
6.5.6.
EMO
VING
6.5.7. REMOVING THE PRESSURE GAUGE
6.5.8. REMO
6.5.9. REMO
6.5.10. R
VING THE
VING THE
PR
(N.T.C. - MFFI ONLY)
OBE
EMOVING THE C.H. FLOW TEMPERATURE
PROBE (N.T.C.)
6.5.11. R
EMO
VING THE
PROBE (N.T.C.)
6.6. A
CCESS TO THE CONTROL SYSTEM
6.6.1. CHECKING THE FUSES
6.6.2. REMOVING THE PRINTED CIRCUIT BOARDS
6.6.3. REMOVING THE TIME CLOCK
PAR
TS
HEATEXCHANGER
CONDENSATETRAP (TUBE)
CONDENSATETRAP
GAS VAL
GAS VAL
GENERA
.H.W.
D
) EXCHANGER
THE PUMP
EXP
ANSION
D.H.W. TEMPERA
C.H. RETURN TEMPERA
7. FAULT FINDING
7.1 FAULT FINDING GUIDE (FLOW-CHARTS)
VE
VE
TOR
CIRCUIT
VESSEL
TURE
TURE
4. ZONE VALVES
5. MAINTENANCE
5.1.
5.2. CLEANING THE PRIMARY EXCHANGER
5.3. CLEANING THE CONDENSATE TRAP
5.4.
G
ENERAL REMARKS
O
TIONAL
PERA
TEST
8. SHORT SPARES PARTS LIST
8.1. ACO 27 MFFI
2
1. GENERAL INFORMATION
1.1. GENERAL INFORMATION
This man
should be kept with the appliance so that it can be consulted by
the user and our author
Please carefully read the instructions and notices about the unit
contained in this manual, as they provide important information
regarding the safe installation, use and maintenance of the
product.
For operating instructions please consult the separate Users
Manual.
ual is an integral and essential part of the product. It
ised personnel.
Read the instructions and recommendations in these Installation
and Ser
use and maintenance of the appliance.
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.
This is a combined appliance for the production of central
heating (C.H.) and domestic hot water (D.H.W.).
This appliance
designed.
The manufacturer declines all liability for damage caused by
improper or negligent use.
No asbestos or other hazardous mater
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,
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, s
turn off the gas tap. Do not tamper with the appliance.
F
request the use of or
contact MTS (GB) Limited.
vicing Instructions carefully to ensure proper installation,
must be used only for the purpose for which it is
ials have been used in
do not turn on or off light
witch off the appliance and
or repairs
, call y
our local A
iginal spare par
uthorised Servicing Agent and
ts. For in-guarantee repairs
3
1.2. TECHNICAL INFORMATION
Name
CE Cer
tification
Flue Type
General Info
Heat Input max/min (Central Heating) kW
Heat Input max (Domestic Hot Water) kW
Heat Output max/min kW
Efficiency of Nominal Heat Input (60/80
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 Band
Energy Performance
Heat Loss to the Casing (∆T=50°C) %
Flue Heat Loss with Burner Operating %
Flue Heat Loss with Burner Off %
Max Discharge of Products of Combustion (G20) Kg/h
Residual Discharge Head mbar
Temp. of exhaust fumes at nominal capacity °C
2 Content %
CO
O2 Content %
Emissions
CO Content ppm
Nox Class
°C) %
CO 27 MFFI
A
0085BP0229
C13-C33-C43-C53-C83-B23-B33
25,5 / 8,9
27,0
22,5 / 7,7
88,2
88,2
92,9
92,9
86,7
A
0,5
2,6
0,4
35,3
0,61
72
9,1
4,3
109
5
CO 27 RFFI SYSTEM
A
0085BP0229
C13-C33-C43-C53-C83-B23-B33
25,5 / 8,9
-----
22,5 / 7,7
88,2
88,2
92,9
92,9
86,7
A
0,5
2,6
0,4
35,3
0,61
72
9,1
4,3
109
5
Head Loss on Water Side (max) (T=20°C) mbar
Residual Head of System bar
Expansion Vessel Pre-load Pressure bar
Maximum Heating Pressure bar
Expansion Vessel Capacity l
Maximum Water Content of System l
Heating Temperature max/min (High temperature) °C
Central Heating
Heating Temperature max/min (Low Temperature) °C
Domestic Hot
ater
W
Specific Flow Rate (10 minutes/DT 30°C) l/min
.H.W. Flow Rate ∆T=25°C l/min
D
.
.H.W
D
Water Temperature (approx) max/min °C
w Rate ∆T=35°C l/min
Flo
D.H.W. Minimum Flow Rate l/min
Pressure of Domestic Hot Water max/min bar
Domestic Hot
Condensate produced l/h
Max.
PH of condensate W
Nominal Pressure Natural Gas (G20) mbar
Consumption at Nominal Capacity(G20) m3/h
Gas
Gas Consumption after 10 Minutes* m
Electrical Supply V/Hz
er Consumption W
w
o
P
ature
emper
Minim
um Ambient
T
Protection Grade of Electrical System IP
nal Fuse Rating
Inter
Elettrical Data
200
0,2
0,7
3
7
130
82 / 42
75 / 20
200
0,2
0,7
3
7
130
82 / 42
75 / 20
56 / 36
12,6
15,2
10,8
2,5
6 / 0,2
1,5
4
20
2,43
3
0,85
230/50
118
C
°
+5
24D
1,5
4
20
2,43
0,85
230/50
118
+5
24D
eight
W
Dimensions (W/D/H)
G.C. Number
* Calculated at 70% maximum output
** Calculated on Upper calorific value
4
Kg
mm
40
280/450/750
47-116-34
40
280/450/750
47-116-09
Name
CE Cer
tification
Flue Type
General Info
Heat Input max/min (Central Heating) kW
Heat Input max (Domestic Hot
Heat Output max/min kW
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 Band
Energy Performance
Heat Loss to the Casing (∆T=50°C) %
Flue Heat Loss with Burner Operating %
Flue Heat Loss with Burner Off %
Water) kW
ACO 32 MFFI
0085BP0229
C13-C33-C43-C53-C83-B23-B33
31,6 /10,5
32,0
28 / 9,5
97,3
88,5
91,2
97,1
89,7
A
0,5
2,7
0,4
ACO 32 RFFI SYSTEM
0085BP0229
C13-C33-C43-C53-C83-B23-B33
31,6 /10,5
----------28 / 9,5
97,3
88,5
91,2
97,1
89,7
A
0,5
2,7
0,4
Max Discharge of Products of Combustion (G20) Kg/h
Residual Discharge Head mbar
Temp. of exhaust fumes at nominal capacity °C
CO2 Content %
O
2 Content
Emissions
CO Content ppm
Nox Class
Head Loss on Water Side (max) (T=20°C) mbar
Residual Head of System bar
Expansion Vessel Pre-load Pressure bar
Maximum Heating Pressure bar
Expansion Vessel Capacity l
Maximum Water Content of System l
Heating Temperature max/min (High temperature) °C
Central Heating
Heating Temperature max/min (Low Temperature) °C
Domestic Hot Water Temperature (approx) max/min °C
Specific Flow Rate (10 minutes/DT 30°C) l/min
w Rate ∆T=25°C l/min
Flo
.
.H.W
D
D.H.W. Flow Rate ∆T=35°C l/min
D.H.W. Minimum Flow Rate l/min
ater max/min
Pressure of Domestic Hot
Domestic Hot Water
W
Max. Condensate produced l/h
PH of condensate W
%
bar
45,7
1
76,4
8,7
5
71
5
200
0,2
0,7
3
7
130
82 / 42
75 / 20
56 / 36
15,3
18,3
13,1
2,5
6 / 0,2
1,8
4
45,7
1
76,4
8,7
5
71
5
200
0,2
0,7
3
7
130
82 / 42
75 / 20
1,8
4
Nominal Pressure Natural Gas (G20) mbar
Consumption at Nominal Capacity(G20) m3/h
Gas
Gas Consumption after 10 Minutes* m
Electrical Supply V/Hz
Power Consumption W
Minimum Ambient Temperature °C
Protection Grade of Electrical System IP
Internal Fuse Rating
Elettrical Data
eight
W
Dimensions (W/D/H) mm
Number
G.C.
* Calculated at 70% maxim
** Calculated on Upper calorific value
um output
Kg
20
3,01
3
0,35
230/50
118
+5
24D
42
280/450/750
47-116-35
20
3,01
0,35
230/50
118
+5
24D
40
280/450/750
47-116-10
5
1.2. OVERALL VIEW
9
8
1
3
5
7
12 13 14 15 16
19
21
24
25
6
4
26
20
17
18
23
2
22
9
9
8
8
1
1
3
3
5
5
7
7
10
12 14 15 16
19
24
25
6
6
4
4
26
20
17
18
23
2
2
22
27/32 MFFI
27/32 RFFI SYSTEM
FIG. 1.0
LEGEND:
1. Flue connector
2. Mixer
an
F
3.
4. Spark generator
5. Burner
Ignition and detection electrode
6.
7. Air release valve
Main heat e
8.
9. Central Heating flow temperature probe
10. Automatic by-pass
11. Domestic Hot Water temperature probe
ety v
Saf
12.
13. Secondary heat exchanger
14. Gas valve
Condensate discharge
15.
16. Condensate trap inspection cap
ain valve
Dr
17.
18. Domestic Hot Water flow switch
19. Circulation pump with automatic air release valve
20. Condensate trap
er
Div
21.
22. Condensate trap (tube)
23. Central Heating return temperature probe
24. Expansion vessel
25. Air pressure switch
Combustion analysis test point
26.
xchanger (aluminium)
e (3 bar)
alv
alve
ter v
6
2. INSTALLATION
2.1. REFERENCE ST
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).
ANDARDS
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 sho
room containing a bath or shower should only be considered if
there is no alter
Where a room-sealed appliance is installed in a room
containing a bath or shower the appliance and any
electrical s
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.
native.
witch or appliance control, utilising mains
wer, the location of the boiler in a
C.O.S.H.H.
Materials used in the manufacture of this appliance are nonhazardous and no special precautions are required when
servicing.
Installation should also comply with the following British
Standard Codes of Practice:
BS 7593:1992
BS 5546:1990
BS 5440-1:2000 Flues
BS 5440-2:2000 Air supply
BS 5449:1990
BS 6798:1987
BS 6891:1989 Installation of low pressure gas pipe up to
BS 7671:2001
BS 4814:1990 Specification for expansion vessels
BS 5482:1994 Installation of L.P.G.
and in the Repub
Codes of Pr
Treatment of water in domestic hot water
central heating systems
Installation of hot water supplies f
domestic purposes
culation hot water systems
ced cir
For
Installation of gas fired hot water boiler
of rated input not exceeding 60kW
28mm
IEE wiring regulations
lic of Ireland in accordance with the f
actice:
or
ollo
s
wing
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.
813
I.S.
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
visions of the Building Regulations applicab
pro
Domestic Gas Installations
le in Scotland,
7
2.3. OVERALL DIMENSIONS
93 65
450 143
118
123
750
5
45
50
35
67 67 65 93
acqua
gas
280
225 225
130 130
F
785
280
450
300
300
450
20
20
93
450
143
118
123
750
5
45
50
35
132132 93
acqua
gas
280
225 225
130 130
F
27/32 RFFI SYSTEM
FIG. 2.1
FIG. 2.0
LEGEND:
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
2.4. MINIMUM CLEARANCES
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.
27/32 MFFI
8
IG. 2.1
F
FIG. 2.2
85 mm
220 mm
300
27/32 RFFI SYSTEM
2.6. ELECTRICAL CONNECTION
The boiler oper
technical data table (Section 1.2), where the maximum absorbed
wer is also indicated. Make sure that the connections for the
po
neutral and live wires correspond to the indications in the
ram. The appliance electrical connections are situated on
diag
the reverse of the control panel (see the Servicing Instructions
for further information Section 6).
IMPOR
TANT
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
ked with the earth symbol; make sure to re-use the ferrule
mar
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”.
ates with alternating current, as indicated in the
!
FIG. 2.2
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.
FIG. 2.3
Note: The diagrams for the electrical system are indicated in
section 2.11.
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
means of a 3
ely, by
of at least 3 mm in all poles or alter
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.
nativ
2.7. GAS CONNECTION
The local gas region contr
service pipe.
If the gas supply f
that an adequate supply is a
other appliances when the
Pipe work must be of an adequate size. Pipes of a smaller size
than the boiler inlet connection should not be used.
or the boiler ser
actor connects the gas meter to the
es other appliances ensure
v
le both to the boiler and the
ailab
v
y are in use at the same time.
A
9
2.8. WATER CONNECTIONS
FIG. 2.4
VIEW
OF THE
BOILER CONNECTIONS
27/32 MFFI
I
A
CB
H
27/32 RFFI SYSTEM
I
A
C E
H
D
end:
Leg
A = Central Heating Flow
B = Domestic Hot Water Outlet
C = Gas Inlet
D = Domestic Cold Water Inlet
E = Central Heating Return
= Condensate discharge
H
I = Safety valve discharge
= Drain valve
J
E
J
Central Heating
Detailed recommendations are giv
5449-1:1990, the f
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:
J
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
dr
aining of the whole system. The taps must be at least
15mm nominal siz
2870:1980.
SAFETY VALVEDISCHARGE:
The discharge should terminate facing downwards on the
ior of the b
xter
e
ly boiling w
(possib
uisance
n
damage to electrical components and wiring.
The discharge must not be over an entrance or a window or
y other type of pub
an
CONDENSATEDISCHARGE:
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 suitab
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:
Connecting in to an internal soil stack (at least 450 mm
i)
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.
ollowing notes are given for general guidance.
e and man
uilding in a position where discharging
ater & steam) will not create danger or
, but in an easily visible position, and not cause
lic access
le acid resistant pipe - e
en in BS 6798:1987 and BS
actured in accordance with BS
uf
.
plastic w
.g.
aste or
10
ii) Connecting into the waste system of the building such as
0
100
200
300
400
500
0 200 400 600 800 1000 1200
(mbar)
(l/h)
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.
Into a soakway.
iv)
O
: If any condensate pipe work is to be installed
N
TE
xternally, then it should be kept to a minimum and be
e
insulated with a waterproof insulation and have a continuous
all.
f
AIR RELEASE POINTS:
These m
ust be fitted at all high points where air naturally
collects and must be sited to facilitate complete filling of the
system.
The appliance has an integral sealed expansion vessel to
accommodate the increase of water 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 WA
FEED - CENTRAL HEA
TER
TING
:
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. N
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.
OTE:
DOMESTIC WA
TER
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 e
vent of an under floor heating system, fit a safety
thermostat on the boiler flow (see Section 2.10). This
mostat should be positioned at a safe distance from the
ther
boiler to ensure the correct operation of the same. If the
mostat is positioned too close to the boiler, the water
ther
remaining in the boiler after domestic hot water has been
awn will flow into the central heating system and may cause
dr
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
automatically when the ther
“E08” would be displayed; boiler operation resumes
mostat 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
RESIDUAL HEAD OF THE BOILER
FIG. 2.5
27/32 RFFI SYSTEM
11
WA
The boiler is equipped with an aluminium allo
exchanger.
The detailed recommendations f
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
- Under no circumstances should the boiler be fired before
- Any treatment of water by additives in the system for frost
- If anti-freeze substances are to be used in the system, check
- In under-floor systems, the use of plastic pipes without
TREA
TER
unsuitableadditives must be removed;
thesystem has been thoroughly flushed; the flushing
procedure m
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 w
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.
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;
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 F
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 r
DO NOT MIX DIFFERENT TYPES OF ANTI-FREEZE
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 exchanger
with a specific system water treatment.
TMENT
y main heat
or water treatment are given in
ust be in line with BS7593:1992.
ater areas or where large quantities of water are in
ernox ALPHI 11, which will prevent rust and incrustation
ange stipulated by the manufacturer ( 7 < pH < 8).
s of those
12
IMPORTANT
Failure to carry out the water treatment procedure
may invalidate the appliance warranty
2.9. FLUE CONNECTIONS
IMPORTANT!!
BEFORE CONNECTING THE FLUE, ENSURE THAT 1 LITRE OF
WATER HAS BEEN POURED INTO THE EXHAUST CONNECTION TO
FILL THE CONDENSATE TRAP
EMPTY
THERE IS A RISK OF FLUE GASSES ESCAPING INTO THE
ROOM.
(FIG.2.6). SHOULD THE TRAP BE
FIG. 2.6
FLUE SYSTEM
The provision for satisfactory flue termination must be made as
descr
ibed 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 ter
minal 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.
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. 2.7
27 MFFI
Coaxial
Systems
TERMINAL POSITION mm
A - Directly below an open window or other opening 300
B - Below gutters, solid pipes or drain pipes 75
C - Below eaves 200
D - Below balconies or car-port roof 200
E - From vertical drain pipes and soil pipes 75
F - From internal or external corners 300
G - Above ground or below balcony level 300
H - From a surface facing a terminal 600
I - From a terminal facing a terminal 1200
J - From an opening in the car port
(e.g. door, window) into dwelling 1200
K - Vertically from a terminal in the same wall 1500
L - Horizontally from a terminal in the same wall 300
M -
Horizontally from an opening window 300
N - Fixed by vertical flue terminal
ype
Exhaust
T
Maximum Extension
Exhaust/Air
(m)
13
C
4
Diameter
of Pipes
(mm)
Ø 60/100
win Pipe
T
Systems
C13, C33, C
53,C83
C
43
20 (S1=S2)
1+39 (S1+S2)
Ø 80/80
Ø 80/80
13
32 MFFI
Exhaust Type
Maximum Extension
Exhaust/Air
(m)
Diameter
of Pipes
(mm)
FIG. 2.8
Coaxial
Systems
Twin Pipe
Systems
13
C
C13, C33, C
C
In FIG. 2.8 (PAG E 11), several different types of flue systems are
shown.
For additional information regarding the flue accessories, please
consult the Flue Pipe Accessories manual.
43
53,C83
4
24 (S1=S2)
1+48 (S1+S2)
Ø 60/100
Ø 80/80
Ø 80/80
14
2.10. ACCESSORY CONNECTION
CN6
CR SE
US
FIG. 2.9
IMPORTANT!!
Before carrying out any repairs to the appliance always
ensure that the e
The boiler will remain live even when the ON/OFF knob is
“O”(off) position.
in the
xternal power supply has been isolated.
SP
TA
FIG. 2.10
IMPORTANT!!
Only remove the links from SP and TA if they are to be
connected to external controls.
In order to gain access to the e
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
2. Access can now be gained to the following connector (see
Section 2.11):
CN10 - Saf
CN 9 - Room Thermostat
CN
CN 6 - Interface PCB
CONNECTION OF ROOM THERMOSTAT OR EXTERNAL
TIME CLOCK
- Insert the thermostat cable through the cable grommet and
a.
fasten it by means of the cable-clamp provided.
b.- Connect the thermostat wires to the terminal block
c.- If a remote time clock is to be fitted, disconnect the
d. - Using a volt-free switching time clock, connect the
e. - If using an external time clock and room thermostat,
ety thermostat for underfoor heating
11 - Time clock
(Fig. 2.12 - Diagram A).
CN9
integral time clock from the P.C.B. CN11
switching wires from the time clock following points 1-4
(Fig. 2.12 - Diagram B).
above
these must be connected in series as points 1-7 above
(Fig. 2.12 - Diagram C).
xternal control connections, it is
(FIG 2.9).
FIG.
2.11
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
- Secondar
When connecting one of the abo
necessar
Menu (see Section 3.6.1)
y Pump
y to modify the
E
E
ameter on the P
par
e accessor
v
ies it is
arameter
FIG. 2.12
15
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