Fondital NOVA FLORIDA DELFIS-ANTEA Condensing Series User manual

DIDACTIC MANUAL
FAMILY: Wall-hung condensing
boilers
GROUP: Instantaneous type
with
forced draught
MODELS: Delfis-Antea
Condensing
V
ERSIONS: For indoor installation
PART NO.: AST 14 C 258/00
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1st Edition, February 2013
ENGLISH

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2 AST 14 C 258/00
Contents
SECTION 1
TECHNICAL CHARACTERISTICS
1.1 – Models
1.2 – Overall Dimensions
1.3 – Technical Specifications ___________________Page 04
SECTION 02
CONTROL PANEL AND DIAGNOSTICS
2.1 – User's Interface
2.2 – LCD
2.3 – Boiler Status and Fault Codes ___________________Page 10
SECTION 03
HYDRAULIC DIAGRAMS AND COMPONENTS
3.1 – Hydraulic Diagrams
3.2 – Hydraulic Unit
3.3 – Primary condensing exchanger
3.4 – Pre-mixed burner
3.5 – Gas valve and fan unit
3.6 – Flue gas venting system ___________________Page 16
SECTION 04
GAS SETTING AND TSP PARAMETERS
4.1 – Gas Valve Setting
4.2 – Chimney Sweep Function
4.3 – Gas Conversion
4.4 – TSP Parameters ___________________Page 32
SECTION 05
OPERATING LOGIC
5.1 – Main General Characteristics ___________________Page 40
SECTION 06
ELECTRICAL SYSTEM
6.1 – Electronic Board
6.2 – Outer terminal box electrical connections
6.3 – Wiring Diagram ___________________Page 73
SECTION 07
VENT DUCTS AND pipeS
7.1 – 100/60 Co-axial Air/Vent Ducts
7.2 – 125/80 Co-axial Air/Vent Ducts
7.3 – 80/80 Split Air/Vent Ducts
7.4 – Split vent ducts 60
___________________Page 76
TABLE OF TECHNICAL FAULTS
___________________Page 83

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3 AST 14 C 258/00

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4 AST 14 C 258/00
SECT. 1
TECHNICAL CHARACTERISTICS
1.1 MODELS
DELFIS-ANTEA Condensing KC 24 – 28
DELFIS-ANTEA Condensing KRB 12- 24 - 28
ABBREVIATION KEY:
K: condensing
C: combined
RB: heating-only, with internal three-way valve for integration with DHW tank heater
MAIN CHARACTERISTICS:
DELFIS-ANTEA Condensing Line Tech KC 24 - 28:
Condensing combined instantaneous boiler for indoor installation, domestic hot water + heating, s
ealed chamber, forced draught, mono-thermal with plate exchanger.
DELFIS-ANTEA Condensing Line Tech KRB 12 - 24 - 28:
heating-only condensing boiler for indoor installation, with three-way valve for integration with
DHW tank heater, sealed chamber, forced draught, mono-thermal
1.2 OVERALL DIMENSIONS
Height H = 700 mm
Width L = 400 mm
Depth D = 250 mm

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5 AST 14 C 258/00

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6 AST 14 C 258/00
INSTALLATION TEMPLATE

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7 AST 14 C 258/00
1.3 TECHNICAL SPECIFICATIONS
General Characteristics
KRB 12 KC-KRB
24 KC-KRB 28
Operating parameters
Equipment category II2H3P
Burner nozzles n° 2
Minimum CH circuit flow rate l/h 400 600
CH circuit min. pressure bar 0,5
CH circuit max. pressure bar 3
DHW circuit min. pressure bar 0,5
DHW circuit max. pressure bar 6
DHW specific flow rate t 30°C l/min 13,5 15
Double flow probe triggering temperature OFF °C 105
Double flow probe triggering temperature ON °C 90
Flue gas thermostat triggering temperature °C 105
Standard central heating setting range °C 20 ÷ 78
Maximum CH working temperature °C 20 + 45
DHW setting range °C 35 ÷ 57
Maximum DHW working temperature °C 35 ÷ 65
Total capacity of expansion vessel l 9
Maximum recommended system capacity (**) l 200
Nominal electrical data
Electric Power Supply: Voltage / Frequency V – Hz 230-50
Power mains supply fuse A 2
Electric cabinet protection degree IP X4D
Max. absorbed power W 131 133
Electric power in standby condition W 1,2
Overall dimensions and connections
Height mm 700
Width mm 400
Depth mm 250
Gas connection - G ½
Flow and return connection - G ¾
Cold water and hot domestic water connection - G ½
Consumption
Natural gas consumption (*) m3/h 1,27 2,51 2,8
Propane gas consumption (*) kg/h 0,93 1,84 2,1
Operating characteristics
Type of ignition - Elettronica
Flame surveillance - Ionizzazione
Type of detection - Non polarizzata fase-neutro
Hot DHW production - Boiler Istantanea (KC)
boiler (KRB)
(*) Value related to 15°C - 1013 mbar condition
(**) Maximum water temperature at 83°C, vessel preloaded at 1 bar.

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8 AST 14 C 258/00
Design data and chimney sizing
KRB 12
Pmax. Pmin. Carico al 30 %
Casing heat loss with burner off % 0,55 -
Casing heat loss with burner on % 0,26 7,78 -
Flue system heat loss with burner on % 2,64 1,92 -
Flue (natural gas) mass flow g/s 8,25 0,89 -
Flue gas temp. – air temp. °C 57,9 34,5 -
CO2 value (natural gas - propane) % 9,0 9,3 -
Heat output efficiency rating (60/80°C) 10,0 10,3 -
Heat output efficiency rating (30/50°C) % 97,1 90,3 -
Efficiency rating
(according to 92/42/EC) % 105,1 105,0 106,0
Nox emission class - ★★★★
Casing heat loss with burner off - 5
KC-KRB 24
Pmax. Pmin. Load at 30 %
Casing heat loss with burner off % 0.28 -
Casing heat loss with burner on % 0.97 6.49 -
Flue system heat loss with burner on % 2.62 2.09 -
Flue (natural gas) mass flow g/s 12.43 1.33 -
Flue gas temp. – air temp. °C 61 33 -
CO2 value (natural gas - propane) % 9.0 – 10.0 9.3 – 10.0 -
Heat output efficiency rating (60/80°C) % 96.7 91.4 -
Heat output efficiency rating (30/50°C) % 105.1 104.9 106.5
Efficiency rating
(according to 92/42/EC) - ★★★★
Nox emission class - 5
KC-KRB 28
Pmax. Pmin. Load at 30 %
Casing heat loss with burner off % 0.25 -
Casing heat loss with burner on % 1.40 5.70 -
Flue system heat loss with burner on % 2.40 2.00 -
Flue (natural gas) mass flow g/s 13.93 1.47 -
Flue gas temp. – air temp. °C 60 45 -
CO2 value (natural - propane) % 9.0 – 9.7 9.3 – 10.3 -
Heat output efficiency rating (60/80°C) % 96.4 92.3 -
Heat output efficiency rating (30/50°C) % 105.5 104.5 107
Efficiency rating
(according to 92/42/EC) - ★★★★
Nox emission class - 5

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9 AST 14 C 258/00
Settings
KRB 12
Heat
capacity Thermal Power MIN-MAX Supply pressure Nozzle diameter Flue gas MIN-MAX
(kW) (kW) (mbar) (mm) (%)
gas metano
G20 12 1,8 – 11,6 (60-80°C)
2,1 – 12,7 (30-50°C)
20 3,05 9,3 ÷ 9,0
gas propano
G31 12 37 2,5 10,3 ÷ 10,0
KC-KRB 24
Heat
capacity Thermal Power MIN-MAX Supply pressure Nozzle diameter Flue gas MIN-MAX
(kW) (kW) (mbar) (mm) (%) +/- 0.1
Natural gas
G20 23.7 2.7 – 22.9 (60-80°C)
3.2 – 24.9 (30-50°C)
3.0 – 27.4 (DHM)
20 3.7 9.3 TO 9.0
propane gas
G31 23.7 37 3.0 10.0 to 10.0
KC-KRB 28
Heat
capacity Thermal Power MIN-MAX Supply pressure Nozzle Diameter Flue gas MIN-MAX
(kW) (kW) (mbar) (mm) (%)
Natural gas
G20 26.4 3.0 – 25.4 (60-80°C)
3.45 – 28.1 (30-50°C)
3.0 – 29.2 (DHM)
20 4.0 9.3 TO 9.0
propane gas
G31 26.4 37 3.3 10.3 to 10.0

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10 AST 14 C 258/00
SECT. 2
CONTROL PANEL AND DIAGNOSTICS
2.1 USER'S INTERFACE
1. Set domestic hot water temperature
These keys are used to set (increase or decrease) the
domestic hot water temperature within a range from
35°C to 60°C.
2. Recall information and confirm parameters
This key is used to scroll the sequence of the values
of some parameters (see following paragraphs). It is
also used to confirm the edited parameters setting.
3. Select boiler state
Press this key to set the following functions.
SUMMER :
Boiler produces domestic hot water, only.
WINTER :
Boiler provides both central heating and domestic hot water.
CENTRAL HEATING ONLY :
Boiler provides central heating water only.
STANDBY OFF:
Boiler in standby mode: central heating and DHW functions are disabled.
4. Resume boiler function
This key allows to reactivate the boiler operation after a shutdown, except for errors E89, E90 and E91 (for
these errors refer to paragraph on page 13).
5. LCD
The LCD shows the boiler status and operation information (see the following paragraph).
6. Set central heating water temperature
These keys set (increase or decrease) the water temperature value of the heating system between 20°C to
45°C (reduced range) or 78°C (standard range).
7. Water pressure gauge
This shows the pressure of the heating system water.

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11 AST 14 C 258/00
2.2 LCD
a. Flue cleaning function indicator
It illuminates flashing when the flue cleaning function is
enabled by pressing keys 2and 4at the same time
(see previous paragraph). When this function is ON,
boiler flow temperature and fan rpm are displayed.
b. DHW indicator
This comes on when the boiler is in DHW mode.
It flashes when setting the DHW temperature with the keys 1(see previous paragraph).
c. Parameter editing indicator
It comes on when entering into the parameter setting mode (in this case the symbol nturns on at the same
time). The parameter and value identification screens flash alternatively.
d. Alphanumeric indicator
This shows the following:
- flow temperature during “heating” function;
- central heating water temperature setting;
- domestic hot water temperature during the “DHW” function;
- domestic hot water temperature setting;
- boiler status;
- boiler diagnosis.
e. Central heating indicator
This comes on when the boiler is in CH mode.
Flashes when setting the CH temperature with adjuster 6 (see previous paragraph).
f. Fan rpm indicator
It turns on together with the symbol awhen the flue cleaning function is active. The flow temperature and the
fan rpm are displayed alternatively.
g. Fictitious room temperature indicator
When an external probe is installed, this indicator flashes when the fictitious room temperature is set via keys
6.
i. Boiler status indicator
Icons indicate which operating modes are enabled:
SUMMER: only icon lit
SUMMER and WINTER: both icons lit
CENTRAL HEATING ONLY: only icon lit
STANDBY: icon OFF lit
l. Flame lighting indicator
This comes on when the burner flame is present.
m. Parameter indicator
Figures to view and edit parameters.
It indicates the working burner current power rate.
n. Parameter indicator
It turns on when entering the parameter setting mode.

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12 AST 14 C 258/00
2.3 BOILER STATUS AND FAULT CODES
Normal operation
Boiler in STANDBY mode.
Boiler in SUMMER mode
No active function
The flow water temperature is displayed
Boiler in SUMMER or WINTER mode
No active function
The flow water temperature is displayed
Boiler in CENTRAL HEATING ONLY mode
No active function
The flow water temperature is displayed
Boiler in SUMMER mode
DHW function active with flame lit
The hot domestic water temperature and the burner power
rate percentage are displayed
Boiler in SUMMER or WINTER mode
DHW function active with flame lit
The hot domestic water temperature and the burner power
rate percentage are displayed
Boiler in SUMMER or WINTER mode
CH function active with flame lit
The flow temperature and the burner power rate percentage
are displayed
Boiler in WINTER mode
CH function active with flame lit
The flow temperature and the burner power rate percentage
are displayed
Malfunction, errors to be reset by the user and self-resettable faults
The display indicates the fault according to the relevant error code (see following table).
Some of such faults can be reset by the user pressing the "rest" key (r), some others are
self-resettable (a):

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Boiler shutdown due to flame absence (r)
Boiler shutdown due to double flow probe triggering (r)
Boiler shutdown due to flue gas thermostat triggering (r)
Boiler shutdown due to water pressure switch triggering (a)
Boiler shutdown due to flow probe fault (a)
Boiler shutdown due to DHW probe fault (a)
Boiler shutdown due to flue gas probe fault (a)
Boiler shutdown due to failure of the tank heater probe (KRB)
External probe fault (a)
Solar collector probe (SCS) fault (a)
Solar valve probe (SVS) fault (fa)
Solar tank heater probe (SBS) fault (a)
Boiler shutdown due to return probe fault (a)
Remote control connection fault (a)
Shutdown due to mixed zone safety thermostat triggering (a)
Failure on flow probe of mixed zone (a)
(showing the zone number)
Boiler shutdown due to fan fault (r)

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No communication between additional boards (f)
Plumbing configuration not allowed
Shutdown due to safety circuit hardware failure
Boiler shutdown due to T max deviation error (r)
Shutdown due to heating fluid circulation malfunction* (r) or (f)
Shutdown due to heating fluid circulation malfunction* (r) or (f)
Shutdown due to heating fluid circulation malfunction* (r) or (f)
Shutdown due to heating fluid circulation malfunction* (r) or (f)
Shutdown due to max. flow derivative threshold exceeded (r)
Shutdown due to max. return derivative threshold exceeded
(r)
Power reduction due to high flue gas temperature* (f)
Maximum number of remote reset attempts reached (r)
* Errors E81-82-83-84 and 88 are not displayed in real-time but memorised in the
shutdown counting (from P51 to P55).

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Malfunction, errors that can be reset by technical service only
To reset particularly serious shutdowns (see following table) it is necessary to call the
technical service.
It is necessary to contemporaneously press the three keys indicated below. Then the
wrench icon is displayed and this indicates the possibility to reset the boiler with the usual
"reset" key.
Flue gas temperature lower than the return one
Flue gas maximum threshold exceeded
Flue gas maximum derivative exceeding alarm

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SECT. 3
HYDRAULIC DIAGRAMS AND COMPONENTS
3.1 HYDRAULIC DIAGRAMS
KC
1. Condensate trap 20. 3-bar safety valve
2. Modulating gas valve 21. Discharge tap
3. CH temperature probe 1 22. Minimum pressure switch
4. CH temperature probe 2 23. 13-14 l/min flow-limiting device
5. Modulating fan 24. Filler cock
6. Return temperature sensor 25. Cold water flow switch with filter
7. Primary condensing exchanger 26. Secondary plate exchanger
9. Deaerator 27. DHW probe
10. Combustion air intake system 28. Automatic by-pass
11. Flue gas vent system 29. Motorised 3-way valve
12. Flue gas analysis ports
13. Flue gas thermostat on vent duct
14. Flue gas thermostat on exchanger SCondensate drain
15. Ignition/detection electrode MHeating system flow
16. Expansion vessel CDHW outflow
17. Fan control sensor GGas intake
18. Deaerator FCold water inlet
19. Circulation pump RCentral heating system return

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KRB
1. Condensate drain trap 17. Fan control sensor
2. Modulating gas valve 18. De-aerator
3. Heating temperature sensor 1 19. Circulating pump
4. Heating temperature sensor 2 20. 3-bar safety valve
5. Modulating fan 21. Discharge tap
6. Return temperature sensor 22. Low pressure switch
7. Primary condensing exchanger 23. Automatic bypass
9. De-aerator 24. Motorised 3-way valve
10. Combustion air intake system
11. Flue gas vent system SCondensate drain
12. Flue gas sampling points GGas inlet
13. Flue gas thermostat on vent duct MHeating system flow
14. Flue gas probe on heat exchanger MB DHW tank heater flow
15. Ignition/detection electrode RB DHW tank heater return
16. Expansion vessel RHeating system return

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3.2 HYDRAULIC UNIT
MOTORISED THREE-WAY VALVE
The boiler uses a three-way valve to divert the water flow into another pipe. Its function
consists in diverting the primary circuit water into the secondary exchanger where heat will
be transferred to the DHW.
It consists of one main brass valve body, one plastic cartridge, and one electric motor
(actuator) to move the internal shutter.
The secondary exchanger is fixed by the three-way valve and another group of
thermopolymers connecting the cold water inlet pipe to the rest of the hydraulic system.
The stainless steel plate exchanger consists of 12 plates for the 24 kW model and 14
plates for the 28 kW version.
When hot domestic water is required, the cold water coming from the hot domestic water
system passes through the flow switch setting the boiler to "DHW" mode. Then the three-
way valve diverts the hot water coming from the primary exchanger into the secondary one
to transfer its heat to the hot domestic water.
Note: In rest condition the three-way valve is in DHW mode position.
Electric
motor
Water inlet from primary
exchanger
Outlet to plate
exchanger
Flow
MOTOR CONNECTIONS
ELECTRICAL
1 Line 1
Central heating
2 Neutral
DHW
3 Line 2

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Three-way valve section:
The boiler is provided with an automatic by-pass with non-return valve whose opening
threshold is of 400 mbar . In case of load losses in the system due to thermostatic valve
triggering, the by-pass ensures a minimum flow inside the primary exchanger.
It protects the primary condensing exchanger from overtemperatures due to the lack or a
poor water flow.
COLD WATER
D.H.W.
By-pass pipe with
non-return valve
3-WAY
VALVE
FLOW RETURN
Low water
pressure switch
Safety valve
3 bar
Expansion vessel
connection
SHUTTER
CARTRIDGE
IN
THERMOPOLYMERS
3-WAY STATUS
Domestic hot water
Shutter upwards
Actuator piston in rest
position
Central heating
Shutter downwards
Actuator piston in working
position
ACTUATOR

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The circulation pump end block features one 3-position
selector to set the motor rotation speed and thus the head to
the system.
The circulating pump is the same for both power rates, what
changes (according to the primary exchanger) is the
residual head curve:
KEY
V1 PumpspeedI(min)
V2 PumpspeedII
V3 Pump speed III (max)
Max. head: 6 m
Max. operating pressure: 6 bar
Max. circulation temperature:
95°C
24 kW
28 kW
12 kW