Page 1
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TEMPRA 12 / 18
Wall-Hung, Gas-Fired,
System Boiler,
for Central Heating
INSTALLATION,
MAINTENANCE AND USER
INSTRUCTIONS
TEMPRA 12:
G.C. NO: 41-267-11
TEMPRA 18:
G.C. NO: 41-267-12
cod. 3543724/3 - 01/2003
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IMPORTANT
Your "benchmark" Installation, Commissioning and Service Record Log Book will be enclosed in your
customer information pack. "This record must be completed and left with the end user"
"All CORGI Registered Installers carry a CORGI ID card and have a registration number. Both
should be recorded in your central heating log book. You can check with the CORGI registered
by calling CORGI on 01256 372300".
• Carefully read the warnings in this instruction booklet, as they provide important
indications on the safety of installation,
operation and maintenance.
• The instruction booklet is an integral
and essential part of the product and
must be carefully kept by the user for
future reference.
• If the appliance is sold or transferred to
another owner, or if it is moved, always
check that the booklet accompanies the
boiler for reference by the new owner
and/or installer.
• The installation and maintenance operations must be performed according to the
standards in force, the instructions of the
manufacturer and must be carried out by
professionally qualified personnel.
• Incorrect installation or poor maintenance
may cause a damager to persons or
property. The manufacturer declines all
liability for damage deriving from errors
in the installation and maintenance of the
appliance, and where there is a failure
to observe the instructions provided by
the manufacturer.
• Before performing any cleaning or
maintenance operations, disconnect the
appliance from the mains power supply
using the system switch and/or the
corresponding on-off devices.
• In the event of faults and/or poor
operation of the appliance, it should be
deactivated. Do not attempt to repair
the appliance. Contact professionally
qualified personnel only.
• The products must only be repairedreplaced by professionally qualified
personnel, using original spare parts
only. Failure to heed this warning may
affect the safety of the appliance.
• To ensure the correct operation of the
appliance, annual maintenance must be
performed by qualified personnel.
• This appliance must only be used for the
purposes it has specifically been designed
for. All other uses are considered
improper and thus dangerous.
• After having removed the packaging,
check that the contents are intact.
• The parts of the packaging must not be
left within the reach of children, as they
are potential sources of danger.
• In case of doubt do not use the appliance
and contact your supplier.
This symbol indicates “Warning”
and is placed near all warnings
regarding safety. Such provisions
must be strictly adhered to so as
to avoid danger and damage to
persons and property.
This symbol highlights a note or
an important warning.
2
Certification
The CE Mark attests that Ferroli gas-fired
appliances conform to the requirements
specified in the corresponding European
directives.
In particular, this appliance conforms to
the following EEC directives:
• Directive 90/396, Gas Appliances,
• Directive 92/42, Efficiency,
• Directive 73/23, Low Voltage, (amended
by no. 93/68)
• Directive 89/336, Electromagnetic
Compatibility (amended by no. 93/68)
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Tempra 12 / 18
1. User/operating instructions....................................................................4
1.1 Introduction.............................................................................................................4
1.2 Control panel ..........................................................................................................5
1.3 Ignition and shut down ...........................................................................................5
1.4 Setting.....................................................................................................................6
1.5 Maintenance............................................................................................................6
1.6 Troubleshooting......................................................................................................6
2. Installation ..............................................................................................7
2.1 General instructions................................................................................................7
2.2 Place of installation .................................................................................................7
2.3 Water connections ..................................................................................................9
2.4 Gas connection .....................................................................................................10
2.5 Electrical connections ...........................................................................................11
2.6 Flue connections ...................................................................................................14
3. Service and maintenance......................................................................22
3.1 Settings .................................................................................................................22
3.2 Commissioning......................................................................................................24
3.3 Maintenance..........................................................................................................25
3.4 Remplacement of parts.........................................................................................27
3.5 Troubleshooting....................................................................................................31
4 Characteristics and technical specifi cations...........................................34
4.1 Dimensions and fi ttings ........................................................................................34
4.2 Overall view and main components .....................................................................35
4.3 Hydraulic diagram.................................................................................................36
4.4 Technical data table ..............................................................................................37
4.5 Diagrams ...............................................................................................................38
4.6 Wiring diagram .....................................................................................................39
3
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Tempra 12 / 18
1. OPERATING/USER INSTRUCTIONS
1.1 Introduction
Dear Customer,
Thank you for having chosen the Tempra 12/18, an advanced-concept FERROLI wall-hung boiler
featuring cutting-edge technology, high reliability and constructional quality. Please carefully read
this manual and leave it with the end user.
The Tempra 12/18 is a high efficiency heat generator for central heating systems, operating
on natural gas or LPG.
The boiler can be connected to an external hot water cylinder for the production of domestic
hot water.
The boiler body is made up of a copper heat exchanger, the special shape of which guarantees
high heat exchange efficiency in all operating conditions, and an atmospheric burner featuring
electronic ignition with ionisation flame control.
The boiler is completely sealed from the surrounding environment: the air required for combustion
is taken in from the outside, and a fan is used to expel the flue gases. The accessories supplied with
the boiler also include a variable-speed pump, expansion vessel, safety valve, air pressure switch,
temperature sensors and safety thermostat.
The microprocessor-based control system means that the operation of the appliance is almost completely
automatic. The central heating output is automatically regulated by the control system according to
requirements. The domestic hot water output (with external hot water cylinder installed) is automatically
and continuously controlled to ensure both comfort and economical operation.
The user simply has to set the temperature required inside the home (using the optional, yet
recommended room thermostat) or set the system temperature and the required domestic hot
water outlet temperature at the cylinder stat. The regulation and control system will then ensure
optimum operation all year round.
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Tempra 12 / 18
1.2 Control panel
To access the control panel, open the drop down cover.
Table 1
LED
a
Burner on signal
b
Lock-out warning signal
Stand-by in central heating operation (light flashing)
d
Central heating request (light on)
e
Mains power (light on)
bar
ab de
3
4
2
1
5
0
6
CEAB D
POS. DESCRIPTION
A OFF/ON/RESET switch
B Central heating temperature
setting
C Water pressure gauge
D Domestic hot water storage
temperature setting (with optional kit)
fi g. 1
E Clock position (optional)
1.3 Ignition and shut-down
Ignition
• Open the gas isolation valve upstream of the boiler.
• Ensure 230V supply is present at the boiler.
• Place the main switch “A” in the ON position.
• Place knob “B” in the Winter position and set the room thermostat, if fitted, to the required
temperature value. At this point, the burner will ignite and the boiler will start operating automatically,
managed by its control and safety devices.
If, after having correctly performed the ignition operations, the burners do not ignite and the
lock-out warning light is on, wait around 15 seconds, then turn knob A to the RESET position and
release it. The control unit will be reset and will repeat the ignition cycle. If, after a number of
attempts, the burners does not ignite, refer to the paragraph on troubleshooting.
Shut-down
Close the gas isolation valve upstream of the boiler, turn knob “A” to OFF and disconnect the
appliance from the mains power supply.
When the boiler power is off the boiler anti-freeze protection is not active.
For extended periods of inactivity during the winter months, and in order to avoid damage due
to freezing, all the water should be drained from the boiler, both the domestic hot water and
the central heating system; alternatively, drain only the domestic hot water and place approved
antifreeze fluid in the central heating system.
5
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Tempra 12 / 18
1.4 Settings
Summer/Winter setting and system temperature control
With knob “B” Fig. 1 in the position of the symbol (Summer), the central heating function is
deactivated. This is only for use with optional water control kit. With the knob “B” Fig. 1 in the position of
the symbol
an external clock/programmer knob “B” must be kept in the winter position and the clock/programmer
used to control the central heating and hot water. Turning the knob clockwise increases the central heating
water temperature, anticlockwise decreases it. The temperature can be set from a minimum of 35° to a
maximum of 85°. It is not recommended, however, to operate the boiler below 45°.
Setting the ambient temperature (using the optional room thermostat)
Set, using the room thermostat or remote control, the temperature required inside the rooms. Based
on the command from the room thermostat, the boiler is ignited and heats the system water to the set
central heating outlet temperature. When the required temperature inside the rooms is reached, the
boiler switches off. If no room thermostat or remote control is available, the boiler will maintain the
system at the set central heating outlet temperature.
Domestic hot water temperature control
Set the hot water cylinder temperature, using knob “D” (supplied in the optional kit).
(Winter), both the central heating function and domestic hot water are active, if used with
System water pressure control
Manually filling the central heating system with external connection and cock. The filling pressure when
the system is cold, as read on the boiler water pressure gauge, must be around 1.0 bar (at least 0.5
bar). If the pressure drops during operation to a value lower than the minimum described above, the
User must restore the initial value using the filling loop. Once the operation is completed, always close
the filling loop. This device is fitted to the system by the installer.
1.5 Maintenance
It is recommended to have annual service of the appliance performed by qualified personnel. Please
refer to Chap. 3.3 in this manual for further information.
The casing, the control panel and the aesthetic parts of the boiler can be cleaned using a soft and damp
cloth, dipped in soapy water if necessary. Do not use abrasive detergents or solvents.
1.6 Troubleshooting
Any anomalies or operating faults are signalled by the LEDs on the control panel. The following table lists
the faults that may arise due to simple problems that can be resolved by the user.
Table 2
LED Problem Solution
Check if the gas isolation valve upstream of the boiler and on the counter are open.
Boiler locked-out
Before calling the service centre, check that the problem is not due to no gas or mains
power supply.
Turn knob “A” Fig. 1 to “Reset” and then release it.
In the event of repeated boiler lock-out, contact the nearest service centre.
6
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Tempra 12 / 18
2. INSTALLATION
2.1 General instructions
This appliance must only be used for the purposes it has been specifically designed for. This appliance is
used to heat water to below boiling temperature at atmospheric pressure and must be connected to
a central heating and/or hot warm distribution system, according to its characteristics, performance
and heating capacity. All other uses are considered improper.
THE BOILER MUST ONLY BE INSTALLED BY SPECIALIST AND QUALIFIED PERSONNEL, IN
COMPLETE COMPLIANCE WITH ALL THE INSTRUCTIONS REPORTED IN THIS TECHNICAL MANUAL,
THE LEGAL STANDARDS IN FORCE, THE PRESCRIPTIONS OF STANDARDS AND ANY LOCAL
STANDARDS, AND ACCORDING TO THE RULES OF GOOD PRACTICE.
Incorrect installation may cause damager to persons and property. The manufacturer will not
be held liable in such events.
This appliance must be installed strictly in accordance with these instructions.
The Gas Safety Regulations (Installations & Use).
The Local Building Regulations.
The Building Regulations.
The Buildings Standards (Scotland - Consolidated) Regulations.
British gas publication DM2 - Guide for installation in timber framed housing.
British Standards Codes of Practice:
B.S. 7593 TREATMENT OF WATER IN DOMESTIC HOT WATER CENTRAL HEATING SYSTEMS
B.S. 5546 INSTALLATION OF HOT WATER SUPPLIES FOR DOMESTIC PURPOSES
B.S. 5440 Part 1 FLUES
B.S. 5440 Part 2 AIR SUPPLY
B.S. 5449 FORCED CIRCULATION HOT WATER SYSTEMS
B.S. 6798 INSTALLATION OF GAS FIRED HOT WATER BOILERS
B.S. 6891 GAS INSTALLATIONS
B.S. 7671 IEE WIRING REGULATIONS
B.S. 4814 SPECIFICATION FOR EXPANSION VESSELS
B.S. 5482 INSTALLATION OF LPG
Model Water Bye Laws
For Northern Ireland the rules in force apply
2.2 Place of installation
The appliance’s combustion chamber is sealed from the surrounding environment and as a result the
appliance may be installed in any room without purpose built ventilation. The installation environment
must nonetheless feature sufficient ventilation, to avoid dangerous conditions arising in the event of
even minor gas leaks. These safety standards are imposed by EEC Directive no. 09/396 for all gas
appliances, including the so-called sealed appliances.
The place of installation must in any case be free of dust, inflammable objects or materials and corrosive
gases. The environment must be dry and not prone to freezing.
The boiler is supplied ready for wall-hung installation. The rear frame of the appliance has a series of
slots for fastening it to the wall, using screws with wall plugs. The fastening to the wall must provide
stable and effective support of the appliance.
The boiler must be fastened to a closed part of wall, which is free of apertures or holes behind the frame
of the boiler that may allow the internal components of the boiler to be reached.
If the appliance is enclosed in a cabinet or alongside another appliance, space must be allowed
for normal maintenance operations. Fig. 2 and Tab. 3 show the minimum and recommended space
to be left free around the appliance.
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C
A A
fi g. 2
Tempra 12 / 18
Table 3
Minimum Recommended
30 mm
A
150 mm
B
C 150 mm 300 mm
15 mm
D
(from opening panels)
B
150 mm
300 mm
> 500 mm
D
Fixing to the wall
For Top Flue connections.
Select suitable position for boiler, using the template mark
flue outlet and boiler mounting points. Drill two 10 mm holes
70 mm deep to accept the wall plugs. Fix the wall bracket
to the wall using standard lock nut (M8) on both sides.
Mount the boiler on the wall bracket and fi x using the special
antitheft nut (M8) as described in the fi g. 3a. Mount the
boiler on the wall bracket.
For Back Flue connections.
Select suitable position for boiler, using the plate inserted
in the optional “back flue outlet kit” mark flue hole and
plate fixing points.
16.5
133 16.53831
fi g. 3a
120
100 1802595
165 115
120
160
720 13
Boiler
dimensions
Øi 100
20 260 10
fi g. 3b
117.5 117.5
235
Follow procedure in 2.6 for boiler transformation and
mounting.
8
102.5 177.5
290
fi g. 4
36 155
400
12485
16.5
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Tempra 12 / 18
2.3 Water connections
The heat capacity of the appliance should be established in advance by calculating the heating
requirements of the building according to the standards in force. For correct operation and long-life
of the boiler, the hydraulic system must be suitably proportioned and always fitted with all the
accessories that guarantee regular operation.
In the case where the central heating outlet and inlet pipes follow paths whereby, at some points,
pockets of air may form, air vent valves should be installed at such points.
In addition, a drain device should be installed at the lowest point in the system, to allow
complete draining.
If the boiler is installed at a lower level than the system, a flow-return valve should be fitted to prevent
the natural circulation of water in the system.
The temperature differential between the outlet and the inlet of the boiler should not exceed 20°C.
Do not use the water pipes as the earth for electrical appliances.
Before installation, carefully clean all the pipes in the system to remove any residues or impurities that
may affect the correct operation of the appliance.
Make the connections to the corresponding fittings, as shown in Fig. 5.
36 12485
155
98
1
Key
1 Central heating outlet, 3/4”
2 Gas inlet, 1/2”
3 Central heating inlet, 3/4”
It is recommended to fit isolation valves between the boiler and the central heating system; these allow
the boiler to be isolated from the heating system, if necessary.
The discharge of any safety valves must be routed to outside dicharging to ground level
100 mm from the floor so as not to create a danger to anyone passing. The manufacturer
of the boiler will not be held liable if this warning is not heeded, and the discharge valve
intervenes and floods the room.
Make the connections to the boiler in a way that its internal tubing is not subject to stress.
2
fi g. 5
3
9
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Tempra 12 / 18
Water treatment
if water treatment is used Ferroli Ltd recommend only the use of Fernox or Sentinel water
treatment products, which must be used in accordance with the manufacturers instructions. For
further information contact:
VESSEL CHARGE
Fernox Manufacturing Co. LTD. Sentinel Division
Tandern house, Marlowe Way Betz Dearborn LTD
Croydon, surrey, CRO 4YS Widnes, Cheshire WA8 5351
Tel. 02870 5601 5000 Tel. 0151 424 5351
Note - If the boiler is installed in an existing system
any unsuitable additives must be removed by
thorough cleansing.
All systems should be cleansed according to
B.S. 7593.
Note - In hard water areas treatment to prevent
lime scale may be necessary.
PRESSURE (bar)
INITIAL SYSTEM
PRESSURE (bar)
TOTAL WATER
CONTENT of SYSTEM
Litres
25
50
75
100
125
150
175
200
For syst. volumes other than
those given above, must. the syst.
volume by the factor across
Note - It is important that the correct concentration of the water treatment product is maintained in
accordance with the manufactures instructions.
0.5 1.0 1.5
1.0 1.5 2.01.5 2.0 2.0
EXPANSION VESSEL VOLUME (litres)
3.5
6.5
13.7
4.7
7.0
12.9
19.4
25.9
32.4
38.8
45.3
51.8
27.5
41.3
55.1
68.9
82.6
96.4
110.2
10.5
14.0
17.5
21.0
24.5
28.0
0.140 0.190 0.330.259 0.551 0.412
9.5
14.2
19.0
23.7
28.5
33.2
38.0
10.3
20.6
30.9
41.2
51.5
61.8
72.1
82.4
8.3
16.5
24.8
33.1
41.3
49.6
57.9
66.2
Filling the boiler and the system
The filling pressure, when the system is cold, must be around 1 bar (at least 0.5 bar). If the pressure
drops during operation to a value lower than the minimum described above, the User must restore
the initial value using the filling loop. For correct boiler operation, the pressure, when hot, must
be around 1,5-2 bar. Once the operation is completed, always close the filling loop. This device
is fitted to the system by the installer.
2.4 Gas connection
Before making the connections, check that the appliance is configured for operation with the
type of fuel available, and carefully clean all the gas pipes in the system, to remove any residues
that may affect the correct operation of the boiler.
The gas connections must be made using the relative coupling (see Fig. 5), according to the standards in
force, with a rigid metal pipe, or a stainless steel flexible continuous-wall pipe, fitting a gas cock between
the system and the boiler. Check that all the gas connections for soudness.
The capacity of the gas meter must be sufficient for the simultaneous use of all the connected appliances.
The diameter of the gas pipe, which leaves the boiler, does not necessarily determine the choice of the
diameter of the pipe used between the appliance and the gas meter; this must be chosen according to
its length and the pressure drop, according to the standards in force.
Do not use the gas pipes as the earth for electrical appliances.
10
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Tempra 12 / 18
2.5 Electrical connections
Connection to the mains power supply
The boiler should be connected to a single-phase, 230 Volt-50 Hz electrical line.
The electrical safety of the appliance is ensured only when the appliance is correctly connected
to an effective earth system, as prescribed by the safety standards in force. Have professionally
qualified personnel check the efficiency and the rating of the earth system. The manufacturer
is not liable for any damage caused by the appliance not being correctly earthed. In addition,
make sure that the electrical system is adequately rated for the maximum power absorbed by
the appliance, indicated on the boiler rating plate, and in particular that the cross-section of the
wires is suitable for the power absorbed by the appliance.
The boiler is pre-wired and fitted with a cable for connection to the electrical line. The connections
to the mains supply must be made using a fixed connection, featuring a double-pole switch with
a contact opening of at least 3 mm. Max 3A fuses must be installed between the boiler and the
line. The correct polarity must be followed (LINE: brown wire / NEUTRAL: blue wire / EARTH:
yellow-green wire) in the electrical connections.
The appliance’s power cable must not be replaced by the user. In the event where the cable is
damaged, turn off the appliance and contact professionally qualified personnel to replace it.
If replacing the electrical power cable.
All wiring must conform to current I.E.E. Regulations
Accessing the electrical terminal block
Follow the operation shown in Figs. 6a and 6b to access the electrical terminal block. The layout
of the terminals for the various connections is shown in the wiring diagram, in the chapter on
Technical Specifications.
Fig. 6a Fig. 6b
Room thermostat
WARNING: THE ROOM THERMOSTAT MUST HAVE 230V LIVE CONTACTS.
Standard Systems
For a general pipe layout and wiring diagram on the “S” and “Y” plan systems please see
fig. 6A, 6B, 6C and 6D.
11
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Tempra 12/18 “S” Plan
FERROLI
TEMPRA
BOILER
12/18
A.A.V
Pipe layout
D.H.W.
Zone Valve
C.H.
Zone Valve
Tempra 12 / 18
This Radiator must
not be turned off
Fig. 6c
Tempra 12/18 Junction Box
10987654
ENEL
NL
diverter valve
9&10
optional
cylinder
sersor
PROGRAMMER
DHW ON
CH ON
NEUTRAL
(optional)
Terminal 8 - SWITCH LINE
LIVE
BROWN BLUE
CH
zone
valve
Wiring diagram
321
N
E
L
230 Vac
fused at
3 amps
12345678910
Room Thermostat
DHW
zone
valve
GREY ORANGE
12
Cylinder Thermostat
Fig. 6d
Page 13
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Tempra 12 / 18
Tempra 12/18 “Y” Plan
FERROLI
TEMPRA
12/18
Pipe layout
Auto air vent
Radiator used as heat sink
must not be turned off
Fig. 6e
Tempra 12/18 Junction Box
10987654321
NL
Terminal 8 - SWITCH LINE
PROGRAMMER
NEUTRAL
LIVE
CH ON
DHW ON
DHW OFF
3 WAY ZONE VALVE
BLUE
WHITE
GREY
ORANGE
NL
Wiring diagram
Honeywell V4073H mid position
The heating system must have a bypass capable of
passing 6 litres/minute if TRV are fitted throughout
12345678910
Room Thermostat
N
E
240 Vac
fused at 3 amps
2
L
C
1
Cylinder Thermostat
Fig. 6f
13
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Tempra 12 / 18
2
1
2.6 Flues connections
This is a “type C” sealed and forced draught appliance, and as such the air inlet and flue gas
outlet must be connected to one of the exhaust/intake systems indicated below. Using the
tables and the methods of calculation described, first verify, before installation, that the flues
do not exceed the maximum allowed length. The standards in force and local legislation must
be adhered to for terminal positions.
Restrictors
For the operation of the boiler, the restrictors supplied with the appliance must be fitted, according to
the indications shown in the tables below.
Choice of the restrictors using
concentric flue
Table 4a
Type
60/100
80/125
Length up to:
1 bend + 1 metre
1 bend + 3 metres
1 bend + 3 metres
1 bend + 4 metres
1 bend + 5 metres
Restrictor to be used
Tempra 12 Tempra 18
37 mm
37 mm
43 mm
47 mm
43 mm
47 mm
Replacing the restrictor
To install or change the restrictor, remove the
fan unit, remove the flue gas connecting pipe 1
(as shown in Fig. 8a) and insert the diaphragm 2
(as shown in Fig. 8b).
Choice of the restrictors using 2
pipe system
Table 4b
Total calculated
flue lenght
Min
0 m
10 m
15 m
20 m
30 m
35 m
40 m
Max
10 m
15 m
20 m
30 m
35 m
40 m
45 m
Use restrictor
Tempra12Tempra
37 mm
18
43 mm
47 mm
N.B.:
The diameter
Ø of the hole
is stamped on
the restrictor
Ø
fi g. 7
The Ø37 for Tempra 12 and Ø43 for Tempra 18
restrictor is fitted as standard on the boilers.
Before inserting the flue gas outlet pipe, check
that the correct restrictor is installed (when this
needs to be used) and correctly positioned.
14
fi g. 8a
8b
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Tempra 12 / 18
70 min.
Connection using concentric flue
For side outlet or roof outlet concentric air/flue gas pipe can be connected directly to the top of
the boiler, or a special back flue outlet kit is available for Rear outlet. Numerous accessories are
available upon request for the various different installation requirements. Please refer to the flue
accessories catalogue, or the price list.
Rear Outlet
Front view
13
160
720
400
165
Bend 60/100
1KWMR81U
115
50
115
160 240
Side Outlet
Front view
L
Ø60 Ø80
DS
* = between 10
and 60 mm
50*
125
70
80
Cut the internal pipe
70 mm longer than “L”
-3 mm/m
P = S + 85 mm
Drill the wall 10, 20 mm
greater than the diameter
of the pipe
Top view
70
fi g. 9a
240160
Slope downwards
by 3 mm/m
S 50* 125
35
Right hand
L = S + D + 225 mm
Left hand
L = S + D + 145 mm
P
110
50
115
160 240
Top view
DS50* 125
L
fi g. 9b
Drill the wall 10, 20 mm
greater than the diameter
of the pipe
70
Slope
downwards
by 3 mm/m
15
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Tempra 12 / 18
The total length in linear metres of the
concentric pipes must not exceed the maximum
length indicated in the table below, considering
that each bend gives rise to the reduction
indicated. For example, a D= 60/100 pipe
with 1 x 90° bend + 1 metre horizontal + 2
x 45° bends + 1 metre horizontal, has a total
equivalent length of 4 metres.
Table 5a
Ø mm
60/100
Maximum allowed
pipe length
Table 5b
Reduction factors for bends
4 m 5 m
Ø mm
80/125
Rear
outlet
1,00 m
1 m
0,5 m
0,5 m
0,25 m
For installation (top flue connection):
1. Define the position for the installation of
the appliance
2. Drill the wall for the passage of the air/flue
gas pipe according to the references
indicated in the figure, considering that
the horizontal sections of pipe must have
a downwards slope of around 3 mm per
metre of length, to prevent any rainwater
from entering the boiler.
3. Make a hole that is 10 - 20 mm greater
in diameter than the rated diameter of
the coaxial pipe used, to simplify its
installation.
4. If necessary, cut the end of the pipes to
measure, remembering that the outside
part of the pipes must protrude from the
wall by between 10 and 60 mm. Eliminate
any burrs from the cut.
5. Connect the pipes to the boiler, placing the
gaskets correctly, and seal the connections to
the wall using the special seal couplings.
For installation (back flue connection):
For direct back flue connection it is necessary
to use the optional kit 1KWMR04A, and it
is required to alter the fan direction inside
the boiler.
Follow carefully next procedure:
Vertical outlet
10
Roof terminal
1KWMA83U
Sloped tile
1KWMA82U
Max. 4m extension
60/100
1KWMA56U
Concentric
adapter 60/100
1KWMR52A
160 240
Remove fan by pulling off electrical connections.
Pull off air pressure switch tubes from the air
pressure switch remove 2 screws b. Rotate the
fan downward to disengage it from the securing
pin a.
b
950
53
50 950
950
50
1000 125
50
max. 4 mt
fig. 10
a
16
b
Fig. 11a
Page 17
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Tempra 12 / 18
Take off the four screws which fix the back plate on sealed chamber, remove and
rotate the plate through 90° and fit it to the top of the boiler to cover the original
flue outlet. Secure it in place with the four screws removed previously.
Fig. 11b Fig. 11c Fig. 11d
Remove fan mounting plate by undoing the three fixing screws d. Rotate the fan through 90°
so that the fan nozzle points sideways. Secure the fan to the plate in the new position using
screws in position c.
c
d
For upper
outlet
For rear
outlet
d
c
c
d
-
Common
For upper outlet
For rear outlet
Fig. 11e
Fix with the screws (b). Refi t wiring connections to fan and air pressure switch tubes ensuring correct
orientation. I.E. red tube to air pressure switch connection with red dot (+) and clear tube to air
pressure switch connection with no paint marking (-).
Fit the fan into the boiler rotating the front to engage with the pin a. Secure with the screws b.
b
d
d
d
Fig. 11f
c
c
c
Fig. 11g
Rear
b
Fig. 11h
17
Page 18
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Tempra 12 / 18
1. Core drill 127mm hole (5").
Fig. 11i
4. Place wall plate on outer
fl ue ensuring it is level. Mark
and drill four holes, two top,
for expanding bolts and two
bottom for plugs and screws.
Fix plate to wall with the
square gasket between the
wall and the plate use the
large diameter washers for the
bolts and screws.
2. Push through the outer fl ue.
Fig. 11l
Square GasketCircular Gasket
3. Gently pull back until wall
seal is fl ush with the wall.
Fig. 11m
5. Through plate into air tube,
drill two holes and fi x in place
using two self tapping screws
M4 x 6mm long.
6. Cut the outer fl ue fl ush with
the flange on the hanging
plate.
Fig. 1p
7. Insert the aluminium fl ue
pipe into white plastic
outer fl ue, making sure
the aluminium pipe sits
fully and centrally into the
flue terminal. Mark the
aluminium flue pipe at
the point it is fl ush with
the mounting plate. Add
36mm to this mark and cut
the aluminium inner fl ue
pipe at this point.
Fig. 11n
Fig. 11o
35 mm
Fig. 11g
18
Page 19
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Tempra 12 / 18
Connection using two pipe system
The appliance may be connected to a system
of separate air/flue gas pipes with wall or
roof outlet, as shown in drawings 14-15 to the
side. Numerous accessories are available upon
request for the various different installation
requirements. The most frequently-used
components are shown in Tables 7 - 8 - 9 -10.
Please refer to the flue accessories catalogue
or the price list for other components.
To check that the maximum allowed length of
the pipes is not exceeded, a simple calculation
must be performed before installation:
1. For each component, Tables 7 - 8 - 9 list a
pressure drop in “equivalent air-metres”,
depending on the position of installation of
the component itself (air intake or flue gas
outlet, vertical or horizontal).
This drop is called “equivalent air-metres”
as it relates to the pressure drop of one
metre of air intake pipe (defined as being
equal to 1). For example, a 90° bend in a
Ø80 flue gas outlet has a pressure drop
equivalent to 2.5 air-metres, that is, equal to
2.5 linear metres of air intake pipe.
Flue
gases
Air
160
110
Ø100
Ø60
fig. 12
2. Once having completely defined the layout
of the double flue system, add the pressure
drops in equivalent-metres, according to the
position of installation of all the components
and accessories in the system.
3. Check that the total pressure drop calculated
is less than or equal to 45 equivalent
metres, that is, the maximum allowable for
this model of boiler.
If the flue system chosen exceeds
maximum allowable limit, some sections of the pipes should be larger in
diameter.
Table 6
Ref.
1
2
3
4
5
6
N° Pieces
1
1
1
1
33
1
Description
Bend Ø80 air pipe
Horizontal Ø80 air pipe
Wind-protection terminal
T adaptor
Vertical Ø80 flue
Stack + connecting pipe
Total
Equivalente
pressure drop
1,5 m
1,0 m
2,0 m
included
33,0 m
4,0 m
41,5 m
6
2 3
5
4
fig. 13
19
Page 20
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Pipes and fittings reduction table
Tempra 12 / 18
A
c
c
e
s
s
o
r
i
e
s
Ø
8
0
Table 7
Description
ale
-fem
flue Ø80
Male
ale
-fem
bend 45° Ø80
Female
ale
-fem
bend 90° Ø80
Female
ale
-fem
Male
bend 90° Ø80
drainage
system
with inspecting
plug+trap for
Pipe fitting M/M/F
Ø80
condensate
outlet
Condensate flue
Spigot and socket
reduction Ø80/100
products
Airwall terminal
of combustion Ø80
Reduction
Air Flue
Vertical
Horizontal
Vertical
Horizontal
1112
1,2 2,2
1,5 2,5
1,5 2,5
7
3
0
5
A
c
c
e
s
s
o
r
e
s
Ø
8
0
A
c
c
e
s
s
o
r
e
s
i
i
Table 8
Description
Ø80
Outlet flue air inlet
for concentric system
Pipe fitting for
outlet flue Ø80
Ø80
Outlet flue air inlet for
connection with split end
Table 9
ale
-fem
flue Ø100
Male
bend
45° Ø100
Male-female
Male-female
bend 90° Ø100
Ø100
products of
combustion
Air wall terminal
Reduction
Air Flue
Vertical
Horizontal
Vertical
4
12
0,4 0,4 0,4 0,8
0,6 1
0,8 1,3
Horizontal
3
Ø80
Air terminal of
inlet protection
2
The pressure drop values described refer to original Ferroli pipes and accessories.
20
Ø
1
0
0
Ø100
of outlet
protection
Air terminal
socket
Ø 80/100
reduction
Spigot and
1,5
1,5 3
Page 21
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Tempra 12 / 18
Flue terminal positions
P
Q
l
F
J
L
B
G
Q
D, E
C
A
H
H
MM
N
Q
N
K
Fig. 14
Tab. 10
Minimum dimensions of flue terminal positions (alltypes)(see fig. 14)
Balanced flues room
Natural
draught
300 mm
600 mm
1500 mm
2000 mm
300 mm
300 mm
300 mm
600 mm
300 mm
400 mm
600 mm
600 mm
sealed
Fanned
draught
300 mm Not allowed 300 mm
300 mm Not allowed 300 mm
300 mm Not allowed 300 mm
Dimensions Terminal position
a
A
a
B
a
C
D 300 mm 75 mm Not allowed 75 mm
E 300 mm 200 mm Not allowed 200 mm
F 600 mm 200 mm Not allowed 200 mm
G 300 mm 150 mmbNot allowed 150 mm
H 600 mm 300 mm Not allowed 200 mm
I 300 mm 300 mm Not allowed 300 mm
J 600 mm 600 mm N/A 600 mm
K 600 mm 1200 mm N/A 1200 mm
L 1200 mm 1200 mm N/A 1200 mm
M 1500 mm 1500 mm N/A 1500 mm
N 300 mm 300 mm N/A 300 mm
O N/A N/A N/A 50 mm
P N/A N/A See Table 2
Q N/A N/A See Table 2
NOTE N/A = Not applicable
a
In addition, the terminal should not be nearer than 150 mm (fanned draucht) or 300 mm (natural draught) to an opening in the building fabric formed for the purpose of accommodating
a built-in element such as a window frame, (see Figure C2). Separation distances are linked to the rated heat inputs as shown.
b
This dimension may be reduced to 75 mm for appliances of up to 5 kW heat input.
Directly below an opening, air brick, (0-7 kW)
opening windows, etc. (>7-14 kW)
Above an opening, air brick, (0-7 kW)
opening windows, etc. (>7-14 kW)
Horizontally to an opening, air brick, (0-7 kW)
opening windows, etc. (>7-14 kW)
Below gutters, soil pipes or drain pipes
Below eaves
Below balconies or car port roof
From a vertical drain pipe or soil pipe
From an internal or external corner
Above ground roof or balcony level
From a surface facing the terminal
(also see 6.1.2)
From a terminal facing the terminal
From an opening in the car port ( e.g. door,
window) into the dwelling
Vertically from a terminal on the same wall
Horizontally from a terminal on the same wall
From the wall on which the terminal is mounted
From a vertical structure on the roof
Above intersection with roof
(kW input expressed in net)
(>14-32 kW)
(>32-70 kW)
(>14-32 kW)
(>32-70 kW)
(>14-32 kW)
(>32-70 kW)
Natural
draught
and Fig. 6b
and Fig. 4
Open flues
Fanned
draught
150 mm
N/A
21
Page 22
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Tempra 12 / 18
3. SERVICE AND MAINTENANCE
3.1 Settings
All the adjustment and conversion operations must be performed by Qualified Personnel, such as
personnel from the Local Customer Service Centre.
FERROLI Ltd. declines all liability for damage to persons and/or things deriving from tampering with
the appliance by non-authorised persons
Conversion of supply gas
The appliance can operate on Natural Gas or LPG as the supply gas, and is factory configured for
use with one of the two gases, as is clearly marked on the packaging and on the rating plate on the
appliance itself. If the appliance has to be used with a gas other than the one it has been set for, the
special conversion kit must be used, as shown below:
1 Replace the nozzles in the main burner, installing the nozzles indicated in technical data table in
Chap. 4.4, according to the type of gas used
2 Adjust the minimum and maximum pressures in the burner (ref. corresponding paragraph), setting
the values indicated in technical data table for the type of gas used.
3 Change the position of Jumper 02 on the electronic board (ref. corresponding paragraph).
4 Apply the adhesive label in the conversion kit next to the rating plate, to confirm the
conversion operation.
Adjusting the burner pressure
This appliance, featuring flame modulation, has two set pressure values: the minimum and maximum,
which must be the values indicated in technical data table, according to the type of gas.
• Connect a suitable pressure gauge to the pressure test point “B”, located downstream of
the gas valve.
• Disconnect the pressure compensation pipe “F”.
• Remove the protection cap “C”.
• Turn the potentiometer P3 (located on the control
board) to the minimum position (clockwise).
• Operate the boiler in central heating mode.
• Adjust the minimum pressure using the screw “D”,
clockwise to decrease it and anticlockwise to increase.
• Turn the potentiometer P3 to the maximum position
(anticlockwise).
• Adjust the maximum pressure using the screw “E”,
clockwise to increase it and anticlockwise to decrease
it.
• Reconnect the pressure compensation pipe “F”.
• Replace the protection screw “C”.
C
Key
A Pressure test point upstream
B Pressure test point downstream
C Protection screw
D Minimum pressure adjustment screws
E Maximum pressure adjustment screws
F Pressure compensation pipe
22
F
EB A D
IN OUT
fi g. 15
Page 23
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Tempra 12 / 18
Adjustments on the electronic board
Follow the indications shown in the figure to access the electronic board.
fi g. 16a
Potentiometer position and functions
P1 = Central heating temperature adjustment
P2 = Domestic hot water temperature control
P3 = Heating output adjustment
P4 = Gas pressure adjustment for ignition
P5 = Minimum gas pressure adjustment
FAN
PC PNO L N HL HL MV1 MV2 MV3 MV4
X6
X8
RY1
RY2
X7
LN
X1 X2 X3 X4
12121312345678910 123
+
-
P5
+
-
P4
PMF03F
RY101
X12
RY100
X10
12
111213
P1
CH
+- +-
123456789
L2
L1
Transformer
X11
L3
Nat/LPG
JP02
JP01
fi g. 16b
45
678910
JP03
P2
DHW
+
-
P3
21
L4
L5
X5
Jumper adjustment
JP01 inserted = Diverting valve System
JP01 not inserted = Not able
JP02:
Jumper inserted for
natural gas operation
Jumper inserted for LPG operation
fi g. 17
23
Page 24
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Tempra 12 / 18
Adjusting the maximum heating output (not normally required)
This adjustment may only be performed electronically using the adjustment potentiometer “P3”,
starting with cold heating system.
Connect a suitable pressure gauge to the pressure test point B located on the gas valve; turn the
temperature control knob to the maximum value, then adjust the pressure to the value required, using
the pressure-output diagram in the chapter on technical specifications. Once this operation has been
completed, turn the burner on and off 2 or 3 times using the thermostat and check that the pressure
remains stable at the set value. If not, a further fine adjustment must be performed, until the pressure
remains stable at the set value. When the burner is ignited to check the calibration pressure, turn the
setting thermostat knob to the maximum value, otherwise the procedure will be incorrect.
Adjusting the heating ∆t by varying the flow-rate/discharge head of the pump
The thermal head, ∆t (difference between the central heating outlet and inlet temperature) must
be less than 20°C. This is checked by varying the flow-rate and discharge head of the pump, using
the speed control (or switch) on the pump itself. Note that increasing the speed of the pump
decreases the ∆t, and vice-versa.
3.2 Commissioning
The appliance must only be commissioned for use by Qualified Personnel,
Before igniting the boiler:
• Open any on-off valves between the boiler and systems.
• Check the gas system for soundness, proceeding with care and using a leak detection water solution
to find any leaks from the connections.
• Fill the system with water and ensure that the air contained in the boiler and the system
has been completely vented, by opening the air vent valve on the boiler and any vent valves
in the system.
• Check that there are no water leaks in the heating system, in the domestic hot water circuits,
in the connections or in the boiler.
• Check the correct connection of the electrical system.
• Check that the appliance is properly earthed.
• Check that the pressure value and gas rate for the heating system are correct.
• Check that there are no flammable liquids or materials in the immediate vicinity of the boiler.
Igniting the boiler
• Open the gas isolation valve upstream of the boiler.
• Vent the air in the pipe upstream from the gas valve.
• Close any switches or insert any plugs upstream of the boiler
• Place the main switch in the ON position.
• Place knob “B” in the Winter position to a value higher than 50°C and set the room thermostat, if
fitted, to the required temperature value. At this point, the burner will ignite and the boiler will start
operating automatically, managed by its control and safety devices.
• Checking gas inlet pressure
- Connect a pressure gauge to inlet tet point;
- Fire the Boiler and set at full gas rate by turning P3 to maximum (anticlockwise);
- Check the pressure gauge is reading 20 mbar (+/-1 mbar);
- Check that this pressure remains as above with any other gas appliances in the house turned on;
- If the pressure is below this reading it should be investigated before continuing as this is a sign
of an incorrect or partially blocked gas supply;
- Turn-off appliance;
- Remove pressure gauge, tihten test point and test with leak detection fluid.
24
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Tempra 12 / 18
If, after correctly having performed the ignition operations, the burners do not ignite and the
shut-down warning light is on, wait around 15 seconds and then turn knob “A” (Fig. 1) to the RESET
position and release it. The control unit will be reset and will repeat the ignition cycle. If, after a number
of attempts, the burners do not ignite, refer to the paragraph “Troubleshooting”.
In the case of power failures while the boiler is in operation, the burners will switch off. When
mains power returns, the burners will automatically re-ignite.
Checks during operation
• Check the gas supply and the water system for tightness.
• Check the efficiency of the flues and air-flue gas pipes during the operation of the boiler.
• Check that the water circulation between the boiler and the systems is correct.
• Ensure that the gas valve modulates correctly both in the central heating phase and the
production of domestic hot water.
• Check the correct ignition of the boiler, by performing a series of ignition and shut-down tests using
the room thermostat or the remote control.
• Ensure that the consumption of gas indicated by the counter corresponds to the values shown
in the technical data table in Chap. 4.
Shut-down
C
lose the gas isolation valve upstream of the boiler and disconnect the appliance from the
mains power supply.
For extended periods of inactivity during the winter months, in order to avoid damage due to
freezing, all the water should be drained from the boiler, both the domestic hot water and the
central heating system; alternatively, drain only the domestic hot water and place the special
antifreeze fluid in the central heating system.
3.3 Maintenance
The following operations must only be performed by Qualified Personnel
easonal checks on the boiler and the stack
S
T
he following checks should be made on the appliance at least once a year:
• The control and safety devices (gas valve, flow-meter, thermostats, etc.) must be working properly.
• The pipes and the air-flue gas terminals must be free of obstacles and not have any leaks.
• The water systems must be perfectly tight and the gas supply sound.
• The burner and the heat exchanger must be clean. Follow the instructions in the next paragraph.
• The electrodes must be free of deposits and positioned correctly.
• The pressure of the water in the system when cold must be around 1 bar; if not, restore this value.
• The expansion vessel must be full.
• The gas rate and the pressure must correspond to the values indicated in the corresponding tables.
• The circulation pumps must not be blocked.
25
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Opening the casing
To open the boiler casing:
1 Using a screwdriver, completely remove the 2
screws, “A”
2 Open the control panel “B” by pulling down
3 Unscrew the 2 screws “C”
4 Remove the casing “D”.
D
B
Tempra 12 / 18
D
C
fi g. 18
A
fi g. 19
Cleaning the boiler and the burner
The body and the burner must not be cleaned using chemical products or steel brushes. Special care
must be taken to ensure all the systems relating to the sealed compartment are tight (gaskets, cable
glands, etc..), to avoid air leaks which, causing a drop in the pressure inside in chamber, may activate
the differential pressure switch and thus shut-down the boiler. Special attention must also be paid,
after all the operations have been completed, to checking and performing all the ignition phases and
operation of the thermostats, gas valve and circulation pump.
After these checks, ensure that there are no gas leaks.
Analysis of combustion
Two test points are installed inside the boiler, one for the flue gases and the other for the intake air.
To make the measurements, proceed as follows:
1) Remove the boiler casing
2) Open the air and flue gas sample points in the
sealed compartment;
3) Insert the probes as far as possible;
4) Open a hot water tap;
5) Adjust the domestic hot water temperature to
the maximum setting.
6) Wait 10-15 minutes to allow the boiler to reach
stable operating conditions*
7) Take a reading with your flue gas analyser.
8) CO/CO2 ratio should be 0.004 or below. If above
a full service is required to find the cause and
then RE-TEST.
9) Following a full service the permissible reading is
now 0.008 or below.
Flue
gases
Air
Testing before thermal equilibrium has been reached will give incorrect readings.
26
fi g. 20
Page 27
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Tempra 12 / 18
3.4 Replacement of Parts
Initial procedure
a) The boiler is cold, electricity supply is isolated, and the gas supply is turned off at the inlet
of the boiler
b) For replacement of parts where water connections are broken, it will be necessary to isolate and drain
either or both the central heating or domestic hot water circuits of the boiler only. The cold water mains
inlet is isolated at the inlet isolation valve. The D.H.W. is drained by opening a hot tap.
The C.H. flow and return cocks are turned off at the isolation valve.
c) Remove components following special notice below and replace in reverse order.
d) Ensure water and gas washers are in good condition.
Final procedure
• Re-open valve and re-charge the system to about 1 bar, and vent boiler and radiators.
Re-charge to 1 bar if necessary.
• Upon completion of the work the following. Should be checked:
I) Gas soundness of all joints
II) Water soundness of all joints
III) The electricity supply.
IV) The pressure of the sealed system and top up
where necessary.
B
To lower the control panel (fig. 21)
• Remove the two fixing screw (fig. 21) "A"
• Lift the two metal brackets "B"
• Rotate down the front panel "C"
Remove and re-presurising of C.H. expansion
vessel
• Refer to initial procedure a, b
• Isolate electricity and water supplies
• Remove outer case (two screws bottom rear corners)
• Loosen the "A" connections to expansion vessel
• Remove "B" screw
• Remove the expansion vessel
• Re-assemble in reverse order
• Re-pressure expansion vessel
(charge pressure 0,8-1 bar)
• Re-fill system to 1 - 1.5 bar
• Check for leaves
(fi g. 22)
C
A
Fig. 21
B
A
Fig. 22
27
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Tempra 12 / 18
Gas valve (fig. 23)
• Isolate gas and electricity supplies
• Remove outer case (two screws bottom rear corners)
• Remove the two securing screws and lower control panel
• Disconnect electrical connections from valve ("A")
• Disconnect plastic tube "C"
• Loosen the connection "D" on gas pipe and the gas inlet
connection of the boiler "E"
• Remove the two fixing screw "E" below gas valve
• Slide out gas valve
• Remove four fixing screw "F" on top of the valve and disconnect
the gas pipe
• Remove bottom connection from gas valve.
• Fit top + bottom gas connections to the new gas valve and
replace in reverse order
• Check operation and gas pressures
Air pressure switch (fig. 24)
• Isolate electricity
• Remove outer case (two screws bottom rear corners)
• Open room sealed compartment
• Remove the two screw "A" fixing air pressure switch
• Disconnect electrical leads "B"
• Remove pressure sensing tubes (white=D; Red=C)
• Note relevant positions of all connections and replace in reverse order.
• Re-instate power and test - P/D 1.15 mb
C
F
D
A
E
Fig. 23
A
B
Central Heating Temperature Sensor (fig. 25)
• Isolate electricity and water supplies
• Remove outer case (two screws bottom rear corners)
• Remove the two securing screws and lower control panel
• Identify the sensor from figure 24
• Disconnect electrical connection to the sensor
• Drain the affected service either D.H.W. or C.H.
• Unscrew the sensor, do not leak water onto P.C.B.
• Replace in reverse order
Safety Valve (fig. 25)
• Isolate electricity and water supplies
• Remove outer case (two screws bottom rear corners)
• Remove the two securing screws and lower control panel
• Identify valve from fig. 25
• Drain the boiler
• Release the outlet union to the valve and undo the valve
union connection
• Remove the valve outlet fitting
• Replace in reverse order
• Refill to 1 - 1.5 bar and TEST
C
D
Fig. 24
C.H. sensor Safety valve
Fig. 25
28
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Tempra 12 / 18
Removal of burner (fig. 26)
• Isolate gas and electricity supplies
• Remove outer case (two screws bottom rear
corners)
• Remove room sealed cover
• Disconnect ignition and flame rectification
leads "A"
• undo gas rail union "B"
• Undo two screws securing the burner assembly
to the boiler combustion chamber "D"
• Withdraw the burner assembly
Injectors (fig. 26)
• Isolate gas and electricity supplies
• Remove outer case (two screws bottom rear
corners)
• Remove room sealed cover
• Remove fixing screw "C" on both sides of gas
collector
• Remove gas collector
• Unscrew and remove injectors;
• Clear or change injectors
D
D
A
B
C
fi g. 26
Removal of fan (fig. 27)
• Isolate gas and electricity supplies
• Remove outer case (two screws bottom rear
corners)
• Remove room sealed cover
• Disconnect fan electrical leads "A"and note
positions
• Disconnect air pressure tubes from air pressure
switch "B" + note positions
• Undo two screws securing fan assembly "C"
• Remove fan from boiler
• Swap mounting plate over to new fan + replace
in reverse order
Limit thermostat, or overheat cut off
thermostat
• Isolate electricity
• Remove outer case (two screws bottom rear
corners)
• Remove room sealed cover
• Identify the location of thermostat from fig. 27
• Pull out thermostat from tube, with its spring
• Remove electrical connections from thermostat
• Remove spring from thermostat
• Replace in reverse order using heat paste on
face of new stat
(fig. 27)
Overheat cut off
thermostat
C
thermostat
B
Fig. 27
A
Limit
29
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Spark or flame detect electrode (fig. 28)
• Isolate gas and electricity supply
• Remove outer case (two screws bottom rear
corners)
• Open room sealed compartment and combustion
chamber
• Identify electrode from fig. 28
• Unplug electrical connection "A" from sensing
electrode
• Remove fixing screw and remove flame detect
electrode
• Remove the two fixing screw from spark electrode
plate and remove it.
• Replace in reverse order, spark gap 3.5 mm
Pump (fig. 29)
Replacement of pump head
• Isolate electricity and flow and return pipes
• Remove casing (two screws bottom rear corners).
• Remove the two securing screws and lower
control panel
• Release pressure from boiler via suitable drain point
• Unplug the pump lead "A" from the pump head
• Place a piece of cloth or other absorbent material over
the rear of the control panel to catch any drops of water
that may fall when the pump head is removed.
• Using a 4mm allen wrench undo the four allen
screws "B" in the pump head, lift away pump
head from the pump body
• fit new head into pump body and secure with the
allen screws tightening evenly.
• Replace electrical connection.
• Refill system and vent pump
Flame detect
B
A
Tempra 12 / 18
SparkA
Fig. 28
F
E
C
Replacement of pump body (fig. 29)
• Proceed as for removal of pump head
• Disconnect the expansion vessel connecting pipe "E" from the rear of the pump body by removing
the U clip from the left hand side
• Disconnect the boiler return pipe and disengage the pump lower connection by removing the U clip "C"
• Disconnect the pump to heat exchanger connection by removing the U clip "F"
• Unscrew the two screws on bottom of pump "D"
• Turn the pump body through 90°, pull the bottom forward and withdraw the pump body
• Reassemble in reverse order taking care to ensure the O-rings are in place and undamaged.
• Refill system and vent pump
D
Fig. 29
Removal of heat exchanger
• Isolate gas, water and electricity supplies
• Remove casing (2 screws bottom corners)
• Remove the two securing screws and lower control panel
• Drain the boiler
• Remove sealed compartment front panel
• Disconnect the overheat thermostat and central heating limit thermostat
• Remove the main burner, fan, flue hood as described previously
• Remove the pump to heat exchanger flow connection and locknut
• Lift out heat exchanger
• Re-assemble in reverse order
• Refill and TEST
30
Page 31
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Tempra 12 / 18
3.5 Troubleshooting
Flow Diagram 1
Checking Power Supply-System Pressure and Anti-freeze Protection
Chek the following carefully before starting
• Gas supply is turned on, is adequate and purged
• Electricity supply is turned on
• Polarity is correct
• CH pressure is set between 1 - 1,5 bar
• CH pump spins freely
• CH system flushed correctly
• CH bypass adquate
CH Selector to
Summer “ ” position
Put main switch to on
Is LED5 on?
YES
Does fan run at full speed?
YES
Does CH Pump run?
YES
If the boiler temperature
is less than 5°C
frost protection is activated
Disconnect
CH flowtemp sensor
NO NO
NO
NO
Is 230V present across
terminals X1-1 X1-2?
YES
Check and if necessary
replace 2A fuse
Is LED5 ON now?
YES
Go to CHART 2
Is Relay RY101 switch on?
NO
Repair external
wiring fault
NO
Replace
main board
YES
Check pump
wiring
connection
YES
Go to CHART 2
Has fan speed stopped?
NO
Check and if necessary
replace main board
Check and if
necessary
replace pump
31
Page 32
Supplied By www.heating spares.co Tel. 0161 620 6677
Flow diagram 2
Checking Central Heating Operation
Tempra 12 / 18
Put CH temperature selector
to maximum
Ensure external controls
are calling for heat
Is LED4 flashing?
YES
Wait 2 minutes
Is LED4 flashing?
YES
Check HT4 and DH sensors
before replace main board
NO
NO
Flow diagram 3
Checking the Fan/Flue Gas Circuit
Does CH pump run?
YES
Go to chart 4
Is relay RY100
switch on
YES
Go to chart 3
Check and if is necessary
replace man board
NO
necessary replace
NO
limit thermostat
Is relay RY101
switch on
NO
Check and if
main board
Check
YES
Check pump
wiring
connection
Check and if
necessary
replace pump
NO
Is relay RY100 switch ON?
YES
NO
Go to charts 2-3
Is 230V present across
fan terminals?
NO
Check air pressure
switch wiring connection N.O.
NO
Check and if
necessary replace
air pressure switch
Does fan run?
YES
Check and if
necessary replace fan
YES
Is air pressure switch
activated?
NO
Differential air pressure
across the air pressure
switch is greater than
1.65 mbar?
NO
Check and clean fan
Check flue and air
intake are correct
and clean
Check Venturi and
air pressure switch
tubes are clean
Check restrictor
is correct
YES
Go to chart 6
YES
Check and if
necessary replace
air pressure switch
32
Page 33
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Tempra 12 / 18
Flow diagram 4
Checking Ignition
NO
Check and if necessary
replace P.C.B.
Is LED1 light on?
Does sparking start
at burner?
YES
Does burner light?
NO
Is LED2 on
after 10 seconds?
YES
Reset lockout
Does burner light now?
NO
Is flame present before
lockout condition?
YES
Adjust with P4 ignition
burner pressure
Check and if necessary
clean burner
NO
the boiler sparking
YES
YES
NO
Check and if necessary
Go to chart 4
Check and if necessary
replace safety thermostat
Check electrodes and
and correct connection
Check and if necessary
Check gas supply
is live and purged
replace gas valve
leads for damage
Is LED2 on
without
YES NO
air pressure switch
replace P.C.B.
Re-check
Check and if necessary
clean injectors
Check and if necessary
clean flame electrode
Check right position
of spark electrode
Check wires
Flow diagram 5
Checking Domestic Hot Water Modulation
YES
Normal operation
carry out
Boiler operated
on central heating mode
Does burner
flame modulate?
NO
Check CH sensor
and replace it if necessary
33
Page 34
Supplied By www.heating spares.co Tel. 0161 620 6677
Tempra 12 / 18
4. CHARACTERISTICS AND TECHNICAL SPECIFICATIONS
4.1 Dimensions and fittings
270
13
110
160
Ø60
160
TOP VIEW
Ø100
105 1752595
115
165
Key
1 Central heating outlet
2 Gas inlet
3 Central heating inlet
98
16.5
720
36
98
36
155
400
1
3
155
12485
5
12485
fi g. 30
34
BOTTOM VIEW
Page 35
Supplied By www.heating spares.co Tel. 0161 620 6677
Tempra 12 / 18
4.2 Overall view and main components
4329
5
28
49
20
21
34
82
8122
16
56
27
50
19
26
36
32
Key
5 Sealed compartment
7 Gas inlet
10 Central heating outlet
11 Central heating inlet
14 Safety valve
16 Fan
19 Combustion chamber
20 Burner assembly
21 Main nozzle
22 Burner
26 Combustion chamber
insulation
27 Copper heat exchanger
29 Flue gas outlet manifold
32 Central heating pump
34 Central heating
temperature sensor
36 Automatic air vent
43 Air pressure switch
44 Gas valve
49 Safety thermostat
50 Central heating limit
thermostat
56 Expansion vessel
63 Central heating
temperature adjustment
74 Filling cock
81 Ignition electrode
82 Detection electrode
84 1
st
gas valve operator
85 2nd gas valve operator
98 Off –On - Reset switch
145 Water pressure gauge
1177 14 84 8544
3
2
1
0
98 63 145
fi g. 31
4
5
6
35
Page 36
Supplied By www.heating spares.co Tel. 0161 620 6677
4.3 Hydraulic diagram
Tempra 12 / 18
29
16
31
49
82
5
43
87
27
50
19
81
22
20
34
14
44
8
98 63 145
7
fi g. 32
32
56
9
Key
5 - Room sealed compartment
7 - Gas supply
8 - Central Heating fl ow outlet
3
4
2
1
5
0
6
9 - Central Heating return inlet
14 - Safety valve
16 - Fan
19 - Combustion chamber
20 - Burner box
22 - Burner
27 - Copper heat exchanger
29 - Tube fl ue outlet
31 - Flue collector
32 - Pump
34 - C.H. fl ow temperature sensor
43 - Air pressure switch
44 - Gas valve
49 - Overheat cu-off thermostat
50 - Central heating limit thermostat
56 - Expansion vessel
63 - C.H. boiler thermostat
81 - Spark electrode
82 - Rectifi cation electrode
87 - Gas pressure test point
98 - Main switch
145 - Pressure gauges
36
Page 37
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Tempra 12 / 18
4.4 Technical data table
Table 11
Output
Nominal Heat Input (Net)
Nominal Heat Input (Gross)
Nominal Heat Output
Gas supply
Main injectors, Natural Gas (G20) mm 6 x 1.3
Supply pressure, Natural Gas (G20) mbar 20,0
Burner pressure, Natural Gas (G20) mbar 12,5 2,5
Natural gas rate (G20) nm3/h 1,4 0,6
Main injectors, LPG (G31) mm 6 x 0.77
Supply pressure, LPG (G31) mbar 37,0
Burner pressure, LPG (G31) mbar 36,0 7,0
LPG gas rate (G31) kg/h 1,04 0,45
kW 13,3 5,8
kW 14,8 6,4
kW 12,0 5,0
Tempra 12 Tempra 18
Pmax Pmin
Pmax Pmin
Central heating
Maximum central heating operating temperature °C90
Maximum central heating operating pressure bar 3
Safety valve bar 3
Minimum central heating operating pressure bar 0,8
Expansion vessel capacity litres 7
Expansion vessel pre-fill pressure bar 1
Hot water capacity litres 0,8
Dimensions, weights, fittings
Height mm 720
Width mm 400
Depth mm 270
Weight with packaging kg 30
Gas system fittings inches 1/2”
System filling fittings inches 1/2”
Central heating system fittings inches 3/4”
Power supply
Max Power Absorbed W 125
Power supply voltage/frequency V/Hz 230/50
Index of protection IP 44
Pmax Pmin
19,9 8,6
22,1 9,6
18,0 7,5
Pmax Pmin
9 x 1.3
20,0
11,8 2,5
2,1 0,9
9 x 0.77
37,0
36,0 7,0
1,6 0,7
90
3
3
0,8
7
1
0,8
720
400
270
30
1/2”
1/2”
3/4”
125
230/50
44
37
Page 38
Supplied By www.heating spares.co Tel. 0161 620 6677
4.5 Diagrams
Pressure - output diagrams
35
30
25
mbar
20
15
G31
(LPG)
Tempra 12 / 18
G31
(LPG)
10
5
kW
6789 10111213145
Tempra 12
Tempra 18
Discharge head available to system
m
C.A.
6
5,5
5
4,5
4
3,5
3
2,5
2
1,5
1
0,5
0
1
Tempra 12
Tempra 18
3
2
0,6 0,8 1 1,2 1,4 1,6 1,8 2 2,2 2,4 2,6
G20
(Natural Gas)
15 16 17 18 19 20
fi g. 32
G20
(Natural Gas)
21 22 23 24 25
2,8 3 3,2 3,4 3,6 3,8 40,40,20
m3/h
Legenda
1 - 2 - 3 = Pump switch positions
A = Boiler pressure drop
fi g. 33
38
Page 39
Supplied By www.heating spares.co Tel. 0161 620 6677
Tempra 12 / 18
4.6 Wiring diagram
LN
95
L
72
155
BL
10 9 8 7 6 5 4 3 2 1
1112
8
14
103
13
1
M
2
62
3
5
BL
BL
4
12
9
5
1
fi g. 34
230V24V
TEST
X5
21
Key
BR Brown
BLUE Blue
BL Black
W White
O Orange
G Green
R Red
V Violet
32
5034
44491643
MV4
MV3
MV2
MV1
BR
Blue
BL
BL
W
W
R
R
BR
Blue
BR
Blue
Blue
BR
BR
Blue
R
V
O
W
Blue
BR
Blue
BR
Blue
BR
JP03
JP01
JP02
X11
X4
123
X9
X12
123456789
12
X10
Nat/LPG
24V
X2 X3
12121312345678910 12345678910111213
X1
230V
98
230V 24V
PMF03F
X6
Key
16 Fan
32 Central heating pump
34 Central heating flow temperature sensor
43 Air pressure switch
44 Gas valve
49 Safety thermostat
50 Central heating limit thermostat
62 Time clock (option)
72 Room thermostat
81 Ignition electrode
82 Sensor electrode
95 Diverting valve (option)
98 Off/On/Reset switch
103 Relay
X8
BL
BL
X7
Y/G
Y/G
81 82
39
Page 40
Supplied By www.heating spares.co Tel. 0161 620 6677
ALL SPECIFICATIONS SUBJECT
TO CHANGE
Lichfi eld Road,
Branston Industrial Estate,
Burton Upon Trent,
Staffordshire DE14 3HD
Tel. 08707 282 885 -
Fax 08707 282 886
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