Fiamma GuiVal Small 12 C Series User manual

®
ELECTRIC HEATING AND INSTANTANEOUS SANITARY HOT
WATER PRODUCTION WALL BOILER
series Small 12 C
USE AND MAINTENANCE MANUAL
CE APPLIANCES IN COMPLIANCE WITH EUROPEAN DIRECTIVE 2006/95/EC. Built and compliant with the
following standards: IEC 60335-2-21:2012, IEC 60335-1:2010, EN 60335-2-21:2003 + A1:2005 + A2:2008 - EN
60335-1:2012 - EN 62233:2008

3
ELECTRIC WALL BOILER
Series SMALL C
Presentation
Thank you for choosing a FIAMMA electric wall boiler, a product that features the latest
heating technologies, and robust and safe materials that ensure maximum efficiency
during use, the highest appliance quality and utmost safety for the user.
The SMALL... series is built according to European Machine Directive 2006/42 - IEC
60335-1:2010 and EN 60335-2-21:2003 +A1:2005 + A2:2008 - EN 60335-1:2012 - EN
62233:2008.
The result is a product with several distinguishing features:
- Particularly quiet operation, with maximum insulation of the unit by means of innovative
special materials, for minimum heat loss.
- High level of reliability due to the careful choice of materials and the rigorous tests carried
out on each appliance after production.
- High yield, with maximum efficiency thanks to the modulation of the electric power to the
heaters following the actual energy requirements of the system, or the sanitary water
production needs. The D.E.S. system manages the appliance by means of temperature
detection probes positioned in every sensitive point of the boiler, allowing the regulation of
the "comfort" or "economy" operating modes to your requirements, in order to reduce
consumption when the appliance is not used at maximum power or demand.
- The appliance is fully adjustable both as far as central heating system water temperature
(with the possibility of choosing high and low temperature system for underfloor heating)
and sanitary hot water temperature.
- The components have been coupled together so that they are all easily accessible from
the front of the unit during routine and extraordinary maintenance activities.
We suggest that our recommendations are carefully followed, and that you contact an
authorised FIAMMA service centre in your area to agree a scheduled maintenance
contract, which will ensure that your appliance always operates at maximum efficiency and
safety, and that it lasts a long time. In thanking you again for your choice, we would like to
remind you that our technical offices and our technical-commercial network are always at
your disposal to provide you with any information of a technical or general nature that you
might require.
FIAMMA GIRO s.r.l.
Company group
FIAMMA GIRO s.r.l. rejects all responsibility for possible inaccuracies contained in this document, due to either printing or transcription
errors. The company also reserves the right to make any changes deemed useful or necessary to its products, without prejudice to the
essential characteristics of the products manufactured and sold.

4
WARNINGS:
THIS APPLIANCE MAY BE USED BY CHILDREN FROM 8 YEARS OF AGE AND
OVER AND BY PERSONS WITH REDUCED PHYSICAL, SENSORY OR
MENTAL CAPABILITIES OR LACK OF EXPERIENCE AND KNOWLEDGE,
PROVIDED THAT THEY ARE SUPERVISED OR HAVE RECEIVED
INSTRUCTIONS FOR THE SAFE USE OF THE APPLIANCE, SO THAT THEY
UNDERSTAND THE RISKS INVOLVED. CHILDREN MUST NOT PLAY WITH
THE APPLIANCE. CLEANING AND MAINTENANCE ACTIVITIES MUST NOT BE
CARRIED OUT BY CHILDREN WITHOUT SUPERVISION.
THE CONNECTION TO THE ELECTRICITY NETWORK MUST BE THROUGH A
DEVICE THAT ALLOWS ITS DISCONNECTION, WITH A CONTACT OPENING
DISTANCE THAT ALLOWS COMPLETE DISCONNECTION UNDER THE
CONDITIONS OF OVERVOLTAGE CATEGORY III, IN ACCORDANCE WITH
THE INSTALLATION RULES.
IN ORDER TO PREVENT ANY RISKS, DAMAGED POWER SUPPLY CABLES
MUST BE REPLACED BY THE MANUFACTURER OR ITS TECHNICAL
SUPPORT SERVICE, OR BY SOMEONE WITH SIMILAR QUALIFICATIONS.
WATER MAY DRIP FROM THE OVERPRESSURE DRAIN PIPE OF THE
APPLIANCE. FOR THIS REASON, SUCH PIPE MUST BE DIRECTED OUTSIDE
AND LEFT OPEN.
THE PRESSURE RELIEF DEVICE MUST BE OPERATED REGULARLY TO
REMOVE LIMESCALE DEPOSITS AND TO CHECK THAT IT IS NOT BLOCKED.
THE DRAIN PIPE CONNECTED TO THE OVERPRESSURE DEVICE MUST BE
SET ON A CONTINUOUS DOWNWARD SLOPE AND IN A LOCATION
PROTECTED FROM THE FORMATION OF ICE.

5
OVERALL DIMENSIONS
The SMALL C series develops on a single level of power with the following dimensions:
SMALL 12 C 12 kW maximum electric power
0
1
234
5
6
ba r
D . E. S 
di g it a l el e ct ro ni c
sy s te m 
+ I -I MO D E + H
O N / O F F
ON
GE N E R A L
SW I T C H -H
Appliance: Packing dimensions:
W (Width): 450 mm Width: 500 mm
H (Height): 690 mm Height: 755 mm
D (Depth): 315 mm Depth: 390 mm
Weight: 32 kg Weight: 34 kg
W D
H

6
HYDRAULIC CONNECTIONS - Connection arrangement diagram:
M Central Heating Delivery: ¾” M
R Central Heating Return: ¾” M
AF Sanitary Cold Water: ½” M
AC Sanitary Hot Water: ½” M
VSR Central Heating Safety Valve (0.3 MPa - 3 bar): ½” F
The appliance is designed to be continuously connected to the water mains without
intermediate fittings.
View from below (under the boiler)
R
MAC AFVSR
Allacciamenti elettrici
Electrical supply

7
MAIN TECHNICAL FEATURES
Elektra SMALL 12 C 12 kW maximum electric power
Single-phase power supply: 230-240 V - 50 Hz
Weight: 36 kg.
Central heating system: 12 kW electric/thermal power from no.2 heating elements (no.2 of
3x2 kW).
Maximum head available to the circulator approx 7 m.
Expansion vessel capacity 9 litres.
0.3 MPa (3 bar) central heating circuit safety valve.
Maximum central heating operating pressure: 0.25 MPa (2.5 bar).
Maximum sanitary water operating pressure: 0.55 MPa (5.5 bar).
Minimum central heating circuit operating pressure: 0.06 MPa (0.6 bar).
Minimum sanitary water operating pressure in "comfort" mode: 0.025 MPa (0.25 bar).
Minimum sanitary water operating pressure in "economy" mode: 0.005 MPa (0.05 bar).
Central heating circuit-boiler body maximum thermal safety limit: 100°C.
POSITIONING OF THE BOILER
The appliance must always be installed on a vertical solid wall capable of supporting its
weight, using the support bracket included in the packaging.
The bracket must be secured to the wall by means of three M8 screws with appropriate
plugs for the type of wall (not supplied with the boiler).
The appliance must be attached to the top of the bracket, inserting the bent section of the
same through the boiler frame at the back.

8
CONTROL PANEL
The control panel is composed of: display, function selection keys, general switch and the
hydrometer it si placed in the lower left corner in front of the unit (see image above).
Using analogical hydrometer
The analogical hydrometer control panel has a dial with unit of measure in a bar, by 0 to 6
bar. The water pressure in the heating system is indicated by the index of the black arrow.
The optimum pressure for the system is between 1 and 1,5 bar. More then 1,5 bar you can
have a maximum pressure of the 2 bar (maximum expansion of the system during the rise
in temperature). More than 2 bar pressure the system is not in the range of operation, and
the mechanical safety valve (preset to 3 bar) can start to lose water (to access the valves
remove the knockout openings at the valves, see page 6 hydraulic installation diagram).
The minimum operating pressure is 0,8 bar (+/-0,2 bar). The differential positive or
negative tolerance is due to the operation of the water pressure switch with fixed setting.
General Display
Hydrometer
switch

9
Keyboard panel (Control panel)
Meaning of keys in user mode
Key Function
-H (J5) Change settings and parameters / DHW setpont decrease
+H (J6) Change settings and parameters / DHW setpont increase
ON/OFF (J7)
- ON - OFF switching (long press)
- Display temperature output / Display setpoint output
- Unlock error of safety thermostat
MODE (J4) Summer - Winter switching (long press)
+I (J2) Display / Increase of heating setpoint (or room temperature)
-I (J3) Display / Decrease of heating setpoint (or room temperature)
-H + +H
(J5 + J6) Enabling function Eco / Comfort (only if JP8 = 0 and P8 = 0)
MODE + ON/OFF
(J4 + J7) Start function degassing
-H + -H
(J3 + J5) To enter into informations menu or temperatures menu
+I + +H
(J2 + J6) To enter into parameters menu
J7
J6
J2
J3 J4
J5

10
SWITCHING ON THE BOILER
The boiler is switched on by pressing the luminous main switch found on the left of the
display in the dashboard. If the boiler is connected to a single-phase power supply source,
the button lights up when pressed (230-240 V - 50 Hz). Then, it shall be pressed the ON-
OFF (J7) on the keypad to switch the power from standby to the operating position, the
display will light up of blue and will appear various symbols signaling function/faults etc. At
this point it shall be chosen the mode of operation, summer or winter operation.
CHOICE OF THE OPERATION MODE (Winter/Summer)
Pressing the key MODE (J4), it will be chosen the mode of operation, Winter or Summer.
Pressing repeatedly each time for at least 5 seconds, you switch from WINTER to
SUMMER or from SUMMER to WINTER then. When the device will be in WINTER mode,
on the display will appeart the Symbol C (snow). When the device will be in SUMMER
mode, on the display will appear the Symbol B (sun).
TEMPERATURE VARIATION OF THE HEATING CIRCUIT
When the apparatus has been set with the snow symbol (C) for the Winter functioning, you
can change the maximum temperature of heating circuit pressing one of the two keys with
the radiator symbol located on the left of the display (+I and -I keys). The key with the
symbol +I (J2), increases the temperature, and the key with the symbol -I (J3)
decreases the temperature.
TEMPERATURE VARIATION OF HOT SANITARY WATER
The temperature of hot sanitary water can be varied independently from the mode of
functioning, both Winter and Summer. The two keys with the Tap symbol on the left of the
control panel, are used to set the maximum temperature of the hot sanitary water circuit.
The key with symbol +H (J6) increases the temperature, and the one with the symbol
-H (J5) decreases the temperature.

11
ON-OFF KEY
Display symbols
The ON/OFF (J7) key, in addition to put the boiler
in standby mode, allows to reset (unlock) the
apparatus in case of high temperature lock. If the
lock would be caused by lack of water pressure
alarm, the recovery will be automatic after that
the hydraulic pressure will be restored at the minimum operating level (0,08 MPa - 0,8 bar) by
means of the operating and the closure of the charging tap placed under the boiler (black
handle).
The display has several symbols, signaling in addition to operation modes, also the
various alarm or system displays:
At each Power-on the firmware revision of the electronic board appears for a few seconds
Big digit: Number of revision
Small digit: Word res
A different main screen is then shown depending on the type of system set and the
operating status.
Symbol Meaning
L Anomalies presents
J Power resistors energization request
I Heating request
H Demand hot water request (generic)
G “Comfort” function enabled
F Parameter menu enabled
E Antifreeze request
C Winter mode
B Summer mode
A OFF mode
Level of
modulation The instantaneous power of the boiler is indicated from 0 to 100%

12
INSTALLATION
TECHNICAL NOTE FOR THE INSTALLER AND THE MAINTENANCE TECHNICIAN.
PLUMBING DIAGRAM
( version: SMALL C 12 kW )
SYSTEM DIAGRAM LEGEND:
1 Central heating circuit expansion tank 9 litres
2 Electric boiler body 12 kW
3 Bimetal safety thermostat 100°C
4 Central heating water temperature probe
5 Heating elements 3x2 kW - 230V/50Hz
6 Boiler body drain tap
7 Pressure switch
8 Safety valve 3 bar (central heating)
9 Exhaust tap (air vent)
10 Variable head circulator
11 Automatic vent valve
12 3-way electric diverter valve
13 diverter valve actuator (motor)
14 Stainless steel plate heat exchanger
15 Sanitary water temperature probe
16 Sanitary water flow regulator tap
17 Sanitary water flow meter
18 Sanitary water flow meter probe
19 Cold water inlet filter
R Central heating system return
F Sanitary cold water inlet
M Central heating system delivery
C Sanitary hot water output

13
WIRING DIAGRAM (single phase)
black
white
red
yellow
blue
brown
black
blue
brown
black
brown
blue
black
brown
brown
brown
blue
black
blue
brown
red
red
white
white
Y/G
black
blue
brown
red
red
white
white
Y/G

14
GENERAL WIRING DIAGRAM - POWER (Single-phase)
Legend of wiring diagrams
Phase 230 Vac F
Neutral 230 Vac N
Contactor sectioned phase FT
Pump PI
Sanitary water diverter valve control DHW
Central heating diverter valve control CH
Diverter valve common COM
Sanitary water flow meter FLM
Gate command, triac no. 1 (12 kW version - 4 kW load) G1
Gate command, triac no. 2 (12 kW version - 2 kW load) G2
Gate command, triac no. 3 (12 kW version - 4 kW load) G3
Gate command, triac no. 4 (12 kW version - 2 kW load) G4
Delivery probe SM
External probe SE
Sanitary water probe SS
Pressure transducer / switch PT
Safety thermostat TS
Room thermostat (prearranged terminals) TA
Main switch (also disconnects the board) ON/OFF
Functional earth derived from the earth point F.E.
Safety earth point on the application PE

15
TRIAC - Wiring diagram
..12 kW
GATE G2
WHITE from point
2
jack
J
6
GATE G
3
BLACK from
point
1
jack
J
4
GATE G4
RED from point
2
jack
J
7
GATE G1
YELLOW from
point
1
jack
J
7
TRIAC 2 (2 kW)
BLACK
se
c
. 2,5
mm
2
TRIAC 3 (4 kW)
BLACK
se
c
.
4
,
0
mm
2
TRIAC 4 (2 kW)
BLACK sec. 2,5 mm
2
TRIAC 1 (4 kW)
BLACK
se
c
.
4
,
0
mm
2

16
FACTORY CONSTANTS
Function Value
Maximum primary circuit temperature 80 °C
Circulator lock prevention operation time 10 sec
Circulator lock prevention activation time 24 hours
Anti-freeze temperature On (circulator only) < 8 °C
Anti-freeze Temperature On (circulator and power) < 5 °C
Anti-freeze Temperature Off > 20 °C
SETPOINTS AND PARAMETERS
Function Default Range
Central heating setpoint 60 °C 30 - 75 °C
Underfloor central heating setpoint 30 °C 10 - 40 °C
Room setpoint (with external probe present) 20 °C 10 - 30 °C
Sanitary water setpoint 50 °C 30 - 60 °C
PARAMETERS
Funzione Display Def. Range
External probe enable (SE) P1 0 0 - 1
Building dispersion coefficient P2 35 5 - 35 °C
Sanitary water post-circulation duration P3 15 1 - 180 sec
Central heating post-circulation duration P4 30 1 - 180 sec
Primary exchanger ON delay P5 0 0 - 240 sec
Differenziale mandata sanitario P6 15 0 ÷ 20 °C
PWM circulator operation speed P7 4 1 = 400 l/h
2 = 800 l/h
3 = 1,000 l/h
4 = 1,200 l/h
Min. temperature of primary exchanger for
circulator ON P8 30 0 - 50 °C
Type of sanitary water storage tank P9 0
0 = internal with probe
1 = external with
thermostat
2 = external with probe
Type of sanitary water request sensor P10 1
0 = flow switch +
three-way pneumatic
1 = flow meter +
three-way electric
Boiler power selection P11 2 1 - 7
System pressure sensor type P12 0 0 ÷ 2
Value
P11
Total
power
[kW]
No.
TRIAC
No. of heating elements
used and power of each
element
G1
[kW]
G2
[kW]
G3
[kW]
G4
[kW] -
2 12 4 no. 2 heating elements,
power 3 x 2kW 4 2 4 2 -

17
Value P12 Description
val: 0 Boiler with PSA water pressure switch connected to poles 1 and 2
(J16 PCB)
val: 1 Boiler with pressure transducer connected to poles 1, 2 and 3 (J16
PCB)
val: 2
The board is configured for operation with P12=1, but the presence of
errors F1 and F10 is ignored. This is necessary in the event that the
pressure transducer fails and technical support does not have the
spare part available. However, the boiler has a needle hydrometer
that indicates the correct pressure of the system. When P12=2, the
pressure shown on the display is 0.0 bar
SELECTION JUMPERS (move jumpers with the board not powered)
0
Jumper in position 0
1
0
1
Jumper in position 1
Jumper 0 1 Default
JP7 High temperature heating
system (radiators)
Low temperature heating system
(floor) 0
JP8 Combined application Central heating only application 0
JP9 Sanitary water system with
storage tank
Instantaneous sanitary water
system 1
JP10 Boiler application Scaldamassetto 0

18
PRIMARY EXCHANGER MANAGEMENT (BOILER BODY)
Depending on the power level required during the "heat demand", all or part of the controls
from G1 to G4 relating to the primary exchanger are switched on. The activation of each
command is controlled within an interval of 4 seconds. The higher the power required, the
more the command will remain active in this interval. The power during a central heating or
sanitary hot water request is calculated using a PID algorithm.
Below are two examples for powers equal to 40% and 60% of the total power (12 kW).
G1
G2
G3
G4
4 s
G1
G2
G3
G4
4 s
Power level 40% - 4.8kW Power level 60% - 7.2kW
Rotation of commands
The order in which the G1÷G4 triac commands are switched on is rotated every hour, so
that the use of all the heating elements is evenly distributed over time.
EXTERNAL PROBE MANAGEMENT (SE)
Installation and sliding temperature operation
The connection of the External Probe (SE) requires the use of the Original
FIAMMA Kit code F.532, offered as part of the accessories for Elektra series
electric boilers. The electric connection must be to the terminals (S and E)
outside the main electric panel already arranged in the standard wiring of the boiler. The
connection requires connection cables and wires with a minimum cross section of 1.5 mm,
possibly avoiding the proximity of power lines or digital lines of inverters or anything else
not compatible. After connection, the external probe must be enabled by entering a
variation of parameter P1 from 0 to 1.
The setpoint followed by the central heating delivery probe will be calculated using the
following formula:
Tch [°C] = [( Troom [°C] – Text [°C]) * dc/10 ] + Troom [°C]
Tch : central heating setpoint calculated by the system
Troom: room temperature set by the user
Text: external temperature measured by the probe
dc: dispersion coefficient of the building, set using the parameter P2.

HEATING REQUEST
At the closure of the contact of the Room Thermostat (TA), or following the request by the
weekly program, if the board is in winter mode, the electric deviation valve is brought in a
heating position (CH), the system circulator is activated only If the temperature of the
primary exchanger detected by the delivery probe is higher than the temperature set by
means of the parameter P8. If the temperature value detected by the delivery probe is less
than the set heating setpoint, the triacs are switched on sequence based on the required
power. This occurs only after a time settable through the parameter P5, to allow for
example the opening of any zone valves. The instantaneous power of the boiler and the
relative control of the Triac G1, G2, G3 and G4 is equal to 50% of the maximum power if
the delivery probe detects a temperature lower than the temperature value defined in the
parameter P8, otherwise it takes place by regulator PID. At the end of the request, the
circulator remains powered for a time equal to the value set by the parameter P4 by
implementing a post circulation on the heating system.
INSTANT SANITARY REQUEST (JP9 = 1)
When a request is received from the DHW flowmeter, the circulator is powered and the Gx
commands relating to the primary exchanger are checked, taking the DHW probe as
reference and as a setpoint, the DHW setpoint. In case of breakage or lack of the DHW
probe, the Gx commands are checked by taking the delivery probe as a reference and as
a setpoint the DHW one + a differential set by the parameter P6. At the end of the request
if the "Comfort mode is not activated ", The circulator remains powered for a time equal to
the value set by means of an parameter P3. In all the above cases, in the presence of an
electric diverter (P10 = 1), it is powered in a DHW position (230V ~ on pole 5). At the end
of the post-circulation phase, the diverter is activated for a short period (switching from
position DHW to position CH and back to DHW) in order to avoid the blocking due to long
inactivity.
20
25
30
35
40
-20-15-10-505101520
Tch [°C]
Text [°C]
Examples of curves with Troom set to 20°C + JP7 = 1
dc=5 dc=8 dc=1 dc=1,5
dc=2 dc=2,5 dc=3 dc=3,5
28
38
48
58
68
-20-15-10-505101520
Tch [°C]
Text [°C]
Examples of curves with Troom set to 20°C + JP7 = 0
dc=5 dc=8 dc=10
dc=15 dc=20 dc=25
dc=30 dc=35
19

20
SANITARY WATER SYSTEM "ECONOMY" / "COMFORT" FUNCTION
The purpose of the "COMFORT" is to keep the primary exchanger warm in order to
guarantee a prompt response of the hot water on demand.
In stand-by conditions (absence of heating request, absence of DHW request, absence of
antifreeze request) the "COMFORT" function activates the primary exchanger, keeping it
at a temperature equal to the DHW setpoint plus a temperature delta set by the parameter
P6, in order to end to guarantee a prompt response of the DHW. The circulator is not
activated. The power used to manage this phase is 50% of the maximum power when the
temperature detected by the delivery probe is less than the DHW setpoint, 25% of the
maximum power when the temperature detected by the delivery probe is between the
DHW setpoint and the DHW Setpoint + P6 and primary exchanger off when the
temperature detected by the delivery probe is higher than the DHW setpoint + P6.
In this configuration simultaneously to the activation of the "COMFORT" mode, the
circulator is activated every 15 minutes and the preheating has priority on the heating
request until the temperature detected by the delivery probe will not exceed the DHW
setpoint + P6, this to allow the preheating of the plates exchanger as well as the primary
exchanger. The request from the flow switch does not reset the 15 minute timer used for the
reactivation of the circulator.
In "ECONOMY" mode, no primary exchanger heating element is activated.
ANTI-FREEZE FUNCTION
The anti-freeze function is active in all the modes of operation SUMMER – WINTER – OFF
(in stand-by mode but with the illuminated main switch on). When the delivery probe
detects a temperature below 8°C, the circulator is activated, powered the area valve and
the electric deviatrum valve is brought to the heating position (CH). If the temperature
drops below 5°C, the main exchanger is switched on until the delivery temperature is
raised to 20°C. At the end of the anti-freeze request, the circulator remains powered for a
time equal to the value set by the parameter P4 by implementing a post circulation on the
heating system.
CIRCULATOR LOCK PREVENTION
When the circulator has not performed an operation cycle in a 24h period, it is activated for
10 sec. to avoid locking due to long period of inactivity. At the end of the post-circulation
phase, activated following the demand for sanitary hot water, the electric diverter valve is
activated for 2 sec. in order to avoid locking due to long period of inactivity.