Unical SPK 150 User manual

ENGLISH
150 - 230 - 300 - 400 - 500 - 600
INSTALLATION AND MAINTENANCE INSTRUCTIONS
SPK

2
http://www.unicalag.it/catalogo-prodotti/professionale-300/334/commercial-condensazione-inox
Provisions for proper disposal of the product in accordance with Directive 2002/96/EC
At the end of its life cycle the product must not be disposed of as urban waste. It can be taken to a special
recycling centre managed by the local authorities, or to a dealer who offers this service.
Separate disposal of a domestic appliance avoids possible negative consequences for the environment and
human health deriving from inappropriate waste handling and allows the recovery of the materials of which
it is made, in order to obtain signicant energy and resource savings.

3
Technical features and dimensions Technical Features General information
Maintenance instructions
ENGLISH
4 INSPECTION AND MAINTENANCE...................................................................................................................................33
4.1 Inspection and maintenance instructions ...................................................................................................................33
4.1.1 Routine yearly verication operations..............................................................................................................34
4.3 Adaptation to the use of other gas ...........................................................................................................................36
4.4 Programming operating parameters .........................................................................................................................37
4.5 Wiring diagram..........................................................................................................................................................41
4.6 Release and reset error codes..................................................................................................................................43
3 INSTALLATION INSTRUCTIONS .......................................................................................................................................16
3.1 General warnings .........................................................................................................................................................16
3.2 Installation standards ................................................................................................................................................16
3.3 Preventive system verication and adjustment operations .......................................................................................16
3.4 Package and Weight.................................................................................................................................................17
3.4.1 Handling...........................................................................................................................................................17
3.5 Positioning in boiler room..........................................................................................................................................18
3.6 Flue gas exhaust pipe connection.............................................................................................................................19
3.7 Connection ...............................................................................................................................................................20
3.8 Filling the system .....................................................................................................................................................22
3.9 Electrical connections ..............................................................................................................................................23
3.10 Commissioning..........................................................................................................................................................27
3.11 Measurement of combustion efciency during installation ......................................................................................28
3.11.1 Activation of the calibration function ...............................................................................................................28
3.11.2 Probes positioning..........................................................................................................................................29
3.12 Checking burner pressure adjustment ......................................................................................................................29
Attention: this manual contains instructions for the exclusive use of the professionally qualied installer and/or maintenance
technician in compliance with current legislation.
The user is NOT qualied to intervene on the boiler.
The manufacturer will not be held liable in case of damage to persons, animals or objects resulting from failure to comply with
the instructions contained in the manuals supplied with the boiler.
2 TECHNICAL FEATURES AND DIMENSIONS .....................................................................................................................9
2.1 Technical features......................................................................................................................................................9
2.2 View of main components..........................................................................................................................................9
2.3 Dimensions ..............................................................................................................................................................10
2.3.1 Dimensions to insert in the boiler room .........................................................................................................11
2.3.2 View of internal access ..................................................................................................................................12
2.4 Water side pressure drops diagram.........................................................................................................................13
2.4.1 Primary circuit pump determination ...............................................................................................................13
2.5 Operation data .........................................................................................................................................................14
1 GENERAL INFORMATION...................................................................................................................................................4
1.1 General warnings.......................................................................................................................................................4
1.2 Symbols used in the manual......................................................................................................................................5
1.3 Appropriate use of appliance .....................................................................................................................................5
1.4 Information for system manager ................................................................................................................................5
1.5 Safety warnings .........................................................................................................................................................6
1.6 Technical data plate ...................................................................................................................................................7
1.7 Water treatment .........................................................................................................................................................8
1.8 Boiler antifreeze protection ........................................................................................................................................8

4
1GENERAL INFORMATION
Any product repairs must be performed solely by personnel
authorised by Unical, using original spare parts only. Failure to
comply with the above can compromise the safety of the appli-
ance and void the warranty.
To guarantee appliance efciency and its correct operation,
annual maintenance must be performed by qualied personnel.
Should you decide not to use the appliance, parts entailing
potential sources of hazard must be made safe.
Before commissioning an appliance that has not been used,
wash the domestic hot water production system, making the
water ow until it has been fully replaced.
Should the appliance be sold or transferred to a new owner or
if you move and leave the appliance, always make sure that the
instruction manual accompanies it in order to be consulted by
the new owner and/or installer.
Only original accessories must be used for all appliances with
optionals or kits (including electric).
This appliance is intended solely for the use for which it was
expressly designed.
Any other use is to be considered improper and therefore dan-
gerous (*)
(see 1.7 Water Treatment).
1.1 - GENERAL WARNINGS
The instruction booklet is an integral and essential part of the
product and must be kept by the user.
Read the warnings contained in this instruction booklet carefully
as they provide important guidelines regarding installation, use
and maintenance safety.
Keep the booklet with care for further consultation.
Your appliance must be installed and serviced in compliance with
the standards in force according to the manufacturer instructions,
up to standard and by legally qualied and certied personnel.
Systems for the production of domestic hot water MUST be
constructed entirely with compliant materials.
By professionally qualied personnel we mean: personnel with
specic technical skill in the eld of heating system components
for civil use, domestic hot water production and maintenance.
Personnel must have the qualications provided for by current
legislation.
Incorrect installation or improper maintenance can cause dam-
age to persons, animals or objects for which the manufacturer
is not responsible.
Before performing any cleaning or maintenance, disconnect the
appliance from the energy mains by acting on the switch of the
system and/or through the specic cut-off devices.
Do not obstruct the terminals of the intake/exhaust ducts.
In the event of failure and/or malfunctioning of the appliance,
switch it off and do not try to repair it or intervene on it directly.
Contact only personnel qualied in compliance with law.

5
1.2 - SYMBOLS USED IN THE MANUAL
Pay special attention when reading this manual to the parts marked by the symbols:
NOTE!
Tips
for the user
ATTENTION!
Possible dangerous
situation for the product
and the environment
DANGER!
Serious danger
to safety
and health
1.3 - APPROPRIATE USE OF APPLIANCE
The heat generator has been built according to the current level of engineering and acknowledged technical
safety rules.
Nonetheless, if improperly used, dangers could arise for the safety and life of the user and other persons
or damage to the equipment or other objects.
The appliance is designed to work in heating systems, with hot water circulation, for the production of
domestic hot water.
Any other use must be considered improper.
For any damage resulting from improper use, UNICAL AG S.p.A. assumes no responsibility.
Use according to the intended purposes also includes strict compliance with the instructions in this manual.
The user must be instructed concerning the use and operation of his heating system, in particular:
• Deliver these instructions to the user, as well as other documents concerning the appliance inserted in the envelope
inside the packaging. The user must keep this documentation safe for future consultation.
• Inform the user about the importance of the air vents and the ue gas exhaust system, highlighting their essential
features and the absolute prohibition of modifying them.
• Inform the user concerning controlling the system's water pressure as well as operations to restore it.
• Inform the user concerning correct temperature control, control units/thermostats and radiators for saving energy.
• Please note that, in compliance with the standards in force, the inspection and maintenance of the appliance must
be carried out in compliance with the regulations and frequency indicated by the manufacturer.
• Should the appliance be sold or transferred to a new owner or if you move and leave the appliance, always make
sure that the instruction manual accompanies it in order to be consulted by the new owner and/or installer.
The manufacturer will not be held liable in the event of damage to persons, animals or objects resulting from
failure to comply with the instructions contained in this manual.
1.4 - INFORMATION FOR THE SYSTEM MANAGER
NOTE!
For further details
refer to the Technical Information:
http://www.unicalag.it/catalogo-
prodotti/professionale-300/334/
commercial-condensazione-inox

6
1.5 - SAFETY WARNINGS
ATTENTION!
The appliance must not be used by children.
The appliance may be used by adults and only after carefully reading the operating instructions manual
for the user.
Children must be supervised so they do not play or tamper with the appliance.
ATTENTION!
-
pliance with the standards and provisions in force. Incorrect installation can cause damage to persons,
animals and objects for which the manufacturer cannot be held responsible.
DANGER!
NEVER attempt performing maintenance or repairs on the boiler on your own initiative.

contract.

to persons, animals and objects for which the manufacturer cannot be held responsible.
Changes to the parts connected to the appliance (once the appliance installation is complete)Do not modify
the following parts:
- the boiler
- the gas, air, water and electricity supply lines
- the ue gas pipe, the safety valve and the exhaust pipe
- the construction parts which affect the operating safety of the appliance
Attention!
To tighten or loosen the screwed ttings, use only appropriate xed spanners.
Incompliant use and/or inappropriate tools can cause damage (e.g. water or gas leakage).
ATTENTION!

Make sure that the gas tank has been deaerated before installing the appliance.
For state-of-the-art tank venting, contact the LPG supplier or person qualied in compliance with the law requirement.
If the tank has not been professionally deaerated, ignition problems could arise.
In that case, contact the supplier of the LPG tank.
Smell of gas
Should a smell of gas be perceived, follow these safety guidelines:
- do not turn electric switches on or off
- do not smoke
- do not use the telephone
- close the gas shut-off valve
- air out the area where the gas leakage has occurred
- inform the gas supplier or a company specialised in installation and maintenance of heating systems.

Do not use or store explosive or easily ammable materials (e.g. petrol, paints, paper) in the room where the ap-
pliance is installed.
ATTENTION!
Do not use the appliance to support any object.
Specically, do not place any liquid containers (Bottles, Glasses, Containers or Detergents) on top of the boiler.

7
General information
ENGLISH
1.6 - TECHNICAL DATA PLATE
CE marking
The CE marking certies that the boilers meet:
- The essential requirements of the gas appliance directive
(directive 2009/142/EEC)
- The essential requirements of the electromagnetic compat-
ibility directive (2004/108/EEC)
- The essential requirements of the efciency directive (92/42/
EEC)
- The essential requirements of the efciency directive (direc-
tive 2006/95/EEC)
The data plate is situated in the low-
er part of the shell (next to the drain
valve) under insulation.
The Duplicate data plate is placed on
the panel board cover.
KEY:
1 = CE monitoring body
2 = Type of boiler
3 = Boiler model
4 = Number of stars (directive 92/42 EEC)
5 = (S.N°) Serial Number
6 = P.I.N.ProductIdenticationNumber
7 = Typesofapproveduegasexhaustcongurations
8 = (NOx)NOxClass
A = Heatingcircuitcharacteristics
9 = (Pn) Effective nominal output
10 = (Pcond) Effective output in condensation
11= (Qn)Maximumheatoutput
12= (AdjustedQn)Adjustedforratedheatoutput
13= (PMS)Max.heatingoperatingpressure
14= (Tmax)Max.heatingtemperature
B = Domestichotwatercircuitcharacteristics
15= (Qnw)Ratedheatoutputindomestichotwaterfunction
(if different to Qn)
16= (D)SpecicD.H.W.owrateaccordingtoEN625-EN
13203-1
19= (PMW)Max.domestichotwateroperatingpressure
20= (Tmax)Max.domestichotwatertemperature
C = Electricalcharacteristics
21= Electricalpowersupply
22 = Consumption
23 = Protection rating
D = Countries of destination
24 = Direct and indirect countries of destination
25 = Gas category
26 = Supply pressure
E = Factory settings
27 = Adjusted for gas type X
28 = Space for national brands
G = ErP
29=Seasonalspaceheatingenergyefciency
30 =EnergyefciencyinDHWproductionmode

8
ATTENTION (*) see general warnings 1.1:
The heating only models are NOT suitable
for the production of water for human con-
sumption according to Ministerial Decree
D.M. 174/2004.
ATTENTION!
ANY DAMAGE TO THE BOILER CAUSED BY
THE FORMATION OF FOULING OR BY COR-
ROSIVE WATER WILL NOT BE COVERED BY
THE WARRANTY.
1.8 - BOILER ANTIFREEZE
PROTECTION
It is activated by default
VALUE MIN MAX
PH 6.5 8
Hardness [°fr] 9 15
NOTE!
Further details in the section
‘‘Technical Information’’ on the boiler
page of the www.unicalag.it website
This protection can intervene only if the electricity
and gas supplies are connected.
If one of the two is not available and upon reset
11 (SM) a temperature level between 2 and
5°C is detected, the appliance will behave as
described in the table below, pos 2.
The heating system can be protected effectively
from frost by using antifreeze products with
inhibitor for heating systems (specific for
multidmetal)
Do not use car engine antifreeze products as
they could damage the water gaskets.
1.7 - WATER TREATMENT
Feed water treatment prevents problems and
maintains the functionality and efciency of the
generator over time.
The ideal water pH in heating systems must be
within:
To minimise corrosion, it is crucial to use a cor-
rosion inhibitor; in order for it to work properly,
the metal surfaces must be clean.
(see system protection ACCESSORIES sect. in
domestic price list)
P
O
S
ANTIFREEZE FUNCTION
Power supplies SM (*) Status
antifreeze func-
tion
Actions
Electric Gas
1ON ON < 7 °C ON - Burner and Pump ON until T > 15°C
2
ON OFF
< 5 ÷ 5 °C ON
FAULT SIGNAL CODE 16
(with Electrical power supply ON)
(see par. 4.6 - ERROR CODES).
Ignition inhibited.
OFF ON
OFF OFF
(*) Flow sensor

9
Technical features
ENGLISH
2.2 - INTERNAL VIEW WITH THE INDICATION OF THE MAIN COMPONENTS
SPK 150
2TECHNICAL FEATURES AND DIMENSIONS
2.1 - TECHNICAL FEATURES
NOTE!
Further details in the section
‘‘Technical Information’’ on the boiler
page of the www.unicalag.it website
SPK 230 - 300 - 400 - 500 - 600
KEY
No. C.E. S.E. Description
3 VG Gas valve
5 Burner
10 TL Limit Thermostat Probe
11 SM Flow sensor
14 Boiler drain valve
18
FL - FH VM Fan
19
AF-AS PV Flue gas pressure switch
27
E. RIL. Detection electrode
28
E. ACC. Ignition electrode
32 Inlet ue inspection
33 Panel Board
53 PG Gas pressure switch (* SPK 150)
54 Visual inspection glass
55 Door insulation
56 Stainless steel vertical smoke pipes
with internal aluminium
57 Technical water tank
58 SL Level sensor
59 Condensate collection pan
60 Combustion chamber
61 Air/gas mixer
62
T.ACC Igniters
G Gas inlet
MHeating system ow
R Heating system return
Sm Air vent connection
Scond Condensate drain DN 32
C.E. =ERRORCODES,seepar.4.6
S.E.
=WIRINGDIAGRAMKEY,seepar.4.5
(N.U.) Component Not-Used

10
2.3 - DIMENSIONS
FRONT VIEW
TOP VIEWREAR VIEW
SIDE VIEW SIDE VIEW
SPK DIMENSIONS [mm]
Depth Width Height
P P1 P2 L L1 L2 L3 H H1 H2 H3 H4 H5 H6 H7
150 944 788 156 666 120 288 81 1809 65.6 1467 323.5 743 571 1579 1679
230 1092 954 141 846 120 277 43 1917 65.6 1557 356 775 630 1697 1768
300 1181 1036 144 910 100 303 200 1946 65.6 1618 353 790 635 1741 1796
400 1276 1152 124 996 100 326 200 2130 65.6 1712 390 820 698 1794 1974
500 1276 1152 124 996 100 326 200 2130 65.6 1712 390 820 698 1794 1974
600 1398 1256 142 1096 200 388 220 2206 65.6 1753 390 810 763 1863 2052

11
Technical features
ENGLISH
FRONT VIEW SIDE VIEW
2.3.1 - DIMENSIONS TO INSERT THE BOILER IN THE BOILER ROOM
Example of Corridor Width (Lc) calculation required
to handle the boiler SPK 150:
L = Boiler Width
P = Boiler Depth
LcLc = Corridor Width
Lp = Door Width
666
Cw = 900 x 944 = > 698 mm
SPK BOILER DIMENSIONS WITHOUT ITS CASING [mm]
P L H
150 917 655 1785
230 1027 795 1895
300 1134 845 1910
400 1258 965 2075
500 1258 965 2075
600 1313 1065 2186

12
2.3.2 - VIEW OF INTERNAL ACCESS
Default
scale for models:
SPK 400 - SPK 500
SPL 600
optional for models:
SPK 150 - SPK 230
SPK 300
SPK 150 - SPK 230 - SPK 300
To remove the cover,
release the 2 springs, refer to the part
shown below.
1
1
2
2

13
Technical features
ENGLISH
2.4 WATER SIDE PRESSURE DROPS DIAGRAM
Pressure drop (m/H2O)
Flow rate (m3/h)
2.4.1 - DETERMINATION OF THE PRIMARY CIRCUIT PUMP OR BOILER PUMP
The pumps must be determined by the installer
or designer according to the boiler and sys-
tem data.
The boiler pump must have head that is able to ensure the pump's
flow rates according to the circuit's ∆t.
The pump is not an integral part of the boiler.
It is recommended to select a pump with a flow rate and
head of approximately 2/3 of its characteristic curve.
SPK 150
Maximum ow rate in l/h (∆t=8K) 14,655
Maximum ow rate in l/h (∆t=15K) 7,816
Requested rated output in l/h (∆t=20K) 5,862
SPK 300
Maximum ow rate in l/h (∆t=8K) 29,426
Maximum ow rate in l/h (∆t=15K) 15,695
Requested rated output in l/h (∆t=20K) 11,772
SPK 230
Maximum ow rate in l/h (∆t=8K) 22,495
Maximum ow rate in l/h (∆t=15K) 11,997
Requested rated output in l/h (∆t=20K) 8,998
SPK 400
Maximum ow rate in l/h (∆t=8K) 39,883
Maximum ow rate in l/h (∆t=15K) 21,303
Requested rated output in l/h (∆t=20K) 15,977
SPK 500
Maximum ow rate in l/h (∆t=8K) 47,300
Maximum ow rate in l/h (∆t=15K) 25,606
Requested rated output in l/h (∆t=20K) 19,203
SPK 600
Maximum ow rate in l/h (∆t=8K) 57,405
Maximum ow rate in l/h (∆t=15K) 30,616
Requested rated output in l/h (∆t=20K) 22,962

14
2.5 - OPERATING DATA AND GENERAL FEATURES
For the adjustment data: NOZZLES - PRESSURE - DIAGRAMS - FLOW RATES refer to the paragraph ADAPTATION TO OTHER
TYPES OF GAS.
SPK 150 SPK 230 SPK 300 SPK 400 SPK 500 SPK 600
Boiler category II2H3P II2H3P II2H3P II2H3P II2H3P II2H3P
Modulation ratio 1 : 4.0 1 : 4.3 1 : 4.3 1 : 4.2 1 : 3.9 1 : 4.4
Rated heat output on P.C.I. Qn kW 140 214 280 380 450 550
Minimum heat output on P.C.I. Qmin kW 35 50 65 90 115 125
Rated useful power (Tr 60 / Tm 80 °C) Pn kW 136.33 209.25 273.76 371.56 440.1 534.5
Minimum useful power (Tr 60 / Tm 80 °C) Pn min kW 32.49 48.21 62.00 86.08 110.0 118.5
Rated useful power (Tr 30 / Tm 50 °C) Pcond kW 145.94 226.80 292.77 399.00 472.2 578.2
Minimum useful power (Tr 30 / Tm 50 °C) Pcond min kW 36.65 54.61 70.03 97.16 124.0 135.2
Rated power performance (Tr 60 / Tm 80°C) % 97.38 97.78 97.77 97.78 97.81 97.2
Minimum power performance (Tr 60 / Tm 80°C) % 92.82 96.46 95.39 95.64 95.62 94.8
Rated power performance (Tr 30 / Tm 50°C) % 104.24 105.98 104.56 105 104.93 105.1
Minimum power performance (Tr 30 / Tm 50°C) % 104.72 109.22 107.74 107.95 107.86 108.2
Performance at 30% of the load (Tr 30°C) % 107.65 107.18 108.99 108.98 108.97 106.5
Seasonal Energy Efciency
according to 2009/125 EEC (<=400Kw) ηs92.6 92.3 93.7 93.6 93.7 91.7
Combustion efciency at nominal load % 97.59 97.43 97.47 97.35 97.02 97.00
Combustion efciency with reduced load % 98.41 98.33 98.28 98.33 98.25 98.4
Casing heat loss with burner operating (Qmin) % 5.59 1.91 2.89 2.69 2.63 3.6
Casing heat loss with burner operating (Qn) % 0.1 0.1 0.1 0.1 0.1 0.1
Net ue gas temperature tf-ta (min)(**) °C 32.3 33.6 34.6 33.7 34.3 31.5
Net ue gas temperature tf-ta (max)(**) °C 49 51.7 51 53.3 60.0 61.0
Maximum permitted temperature °C 100 100 100 100 100 100
Maximum operating temperature °C 85 85 85 85 85 85
Flue gas mass ow rate (min) kg/h 56.16 80.97 105.26 107.0 131.5 141.7
Flue gas mass ow rate (max) kg/h 224,60 346,57 453,47 621,05 728,67 898,97
Excess air % 23.00 24.25 24.25 24.25 26.84 25.5
(***) CO2 (min/max) % 9.3 - 9.3 9.2 - 9.2 9.2 - 9.2 9.1 - 9.1 9.2 - 9.2 9.1 - 9.1
Heat loss at chimney with burner on (min) % 1.59 1.67 1.72 1.67 1.75 1.58
Heat loss at chimney with burner on (max) % 2.41 2.57 2.53 2.65 2.98 3.05
Heat loss on stop at ∆T 30°C % 0.23 0.18 0.12 0.25 0.21 0.24
Minimum heating circuit pressure bar 0.5 0.5 0.5 0.5 0.5 0.5
Maximum heating circuit pressure bar 6 6 6 6 6 6
Water content l 153 210 270 340 340 425
Methane gas consumption G20 (pow.sup. 20 mbar) at Qn m3/h 14.80 22.63 29.61 40.18 47.58 58.16
Methane gas consumption G20 (pow.sup. 20 mbar) at Qmin m3/h 3.70 5.29 6.87 9.52 12.16 13.22
Gas consumption G25 (pow.sup. 20/25 mbar) at Qn m3/h 17.22 26.32 34.43 46.73 55.34 67.64
Gas consumption G25 (pow.sup. 20/25 mbar) at Qmin m3/h 4.30 6.15 7.99 11.07 14.14 15.37
Propane gas consumption (pow. sup. 37/50 mbar) at Qn kg/h 10.87 16.61 21.73 29.50 34.93 42.69
Propane gas consumption (pow. sup. 37/50 mbar) at Qmin kg/h 2.72 3.88 5.05 6.99 8.93 8.70
Chimney base maximum pressure available Pa 100 100 100 100 100 100
Max condensate production kg/h 11.3 13.7 15.8 28.5 28.8 31.0
Emissions
CO at maximum heat output with 0% of O2 mg/kWh 13 17 17 16 22.7 24.8
NOx at maximum heat output with 0% of O2 mg/kWh 34 50 40 29 56 68.4
NOx Class 5 5 5 5 5 5
Electrical data
Power supply voltage/frequency V/Hz 230/50 230/50 230/50 230/50 230/50 230/50
Fuse on the power supply A (R) 6 6 6 6 6 6
Electricity consumption on standby kW 0.005 0.005 0.005 0.005 0.005 0.004
Protection rating IP 20 20 20 20 20 20
Room Temperature = 20°C
(**) Temperature detected with appliance operation ow rate 80°C / ret. 60°C
(***) See table ‘’NOZZLES - PRESSURE’’

15
Technical features and dimensions
ENGLISH
2.5.1 - TECHNICAL DATA ACCORDING ErP DIRECTIVE
SPK 150 SPK 230 SPK 300 SPK 400 SPK 500 SPK 600
Element Symbol Unit
Effective nominal output Prated kW 136 209 274 371 440 534
Seasonal energy efciency to heat
the room ƞs% 93 92 94 94 94 92
Season efciency class to
discharge A A A A * *
For boilers to heat the room
and mixed boilers: useful heat output
Useful heat output with
high temperature capacity
(Tr 60 °C / Tm 80 °C)
P4kW 136.3 209.3 273.8 371.6 440.1 534.5
Rated heat output efciency
with high temperature capacity
(Tr 60 °C / Tm 80 °C)
ƞ4% 87,8 88,1 88,1 88,1 88,1 87,6
Useful power at 30% of the rated heat
output with low temperature
capacity (Tr 30 °C)
P1kW 45.2 68.8 91.6 124.2 147.1 175.8
Performance at 30% of the rated heat
output with low temperature
capacity (Tr 30 °C)
ƞ1% 96,9 96,6 98,2 98,1 98,2 96,0
Boiler with output range adjustment: YES / NO
Auxiliary electricity consumption
With a full load elmax kW 0.190 0.195 0.210 0.425 0.555 0.590
With a partial load elmin kW 0.042 0.040 0.032 0.051 0.053 0.088
Standby mode PSB kW 0.005 0.005 0.005 0.005 0.004 0.007
Other elements
Heat dispersion on standby Pstb kW 0.32 0.39 0.34 0.95 0.95 1.34
Nitrogen oxides emissions NOx
Mg/kWh 67 61 59 53 56 62
For mixed heating appliances
Declared load prole - - - - - -
Water heating energy efciency ƞwh % - - - - - -
Daily consumption of electricity Qelec kWh - - - - - -
Daily consumption of fuel Qfuel kWh - - - - - -
Internal sound power level Lwa dB (A) - - - - - -
Seasonal DHW efciency class - - - - - -
* Appliances not covered by Directive 2009/15 / EC
NO NO NO NO NO NO

16
3INSTALLATION INSTRUCTIONS
ATTENTION!
This boiler is intended solely for the use for
which it was expressly designed. Any other
use is to be considered improper and there-
fore dangerous.
This boiler heats water at a temperature
lower than the atmospheric pressure boiling
temperature.
Before connecting the boiler, have profes-

a) Thoroughly wash all the piping of the sys-
tem to remove any residues or impurities,
which could jeopardise proper operation
of the boiler.
b) Check that boiler is set up to operate with
the available type of fuel.
This can be seen written on the package
and on the technical feature plate;
c) Check that the chimney/flue has an
appropriate draught, without any bottle-
necks, and that no exhausts from other

has been
implemented to accommodate several

and regulations in force. Only after this
check
and chimney be mounted;
ATTENTION!
If there is dust and/or if there are
aggressive/corrosive vapours present in
the installation room, the appliance must
be protected suitably and must be able to
operate independently from the air in the
room.
ATTENTION!
Mount the appliance respecting the minimum
distances required for installation and main-
tenance.
The boiler must be connected to a central
heating system and/or domestic hot water

and output.
3.1 - GENERAL WARNINGS
3.2 - STANDARDS FOR INSTALLATION
It must be installed by a professionally qualied technician, who
shall take the responsibility of observing all local and/or
      
the applicable technical standards.
3.3 - PREVENTIVE VERIFICATION AND
VERIFICATION AND ADJUSTMENT
OPERATIONS
NOTE!
For further details relating to the stand-
ards, rules and regulations for safe in-
stallation of the thermal unit, refer to the
section "Technical Information" on the
boiler page of the www.unicalag.it website
NOTE!
Further details in the section
‘‘Technical Information’’ on the boiler
page of the www.unicalag.it website
Before installing this appliance on old systems, check that:
- The chimney is suitable for appliances with condensation,
combustion products temperature, and built in compliance with
the standards in force in this regard.
Is as straight as possible, airtight and insulated, and has no
obstructions or constructions.
- The chimney is equipped with a tting to drain
condensate.
- The boiler room is equipped with a duct to drain condensate
produced from the boiler.
- The electrical system has been set up by a qualied techni-
cian in compliance with the rules in force.
- The rate, head and direction of the ow of the circulation
pumps are appropriate.
- The fuel adduction line and the tank, if any, are made ac-
cording to relevant standards in force.
- The expansion vessels can fully absorb dilation of the uid in
the system.
- The system has been cleaned from sludge and scaling.

17
Technical features
ENGLISH
NOTE!
Further details in the section
‘‘Technical Information’’ on the boiler
page of the www.unicalag.it website
3.4 - PACKAGING
Check integrity of the content.
Keep the packaging material (plastic bags, etc.)
out of the reach of children as they are potential
sources of danger.
Unical will not be held liable for damage to persons,
animals or objects due to failure to comply with the
above instruction.
As well as the appliance, the packaging contains:
Pouch with the following documentation:
- Manager operating instructions booklet
- Instruction booklet for the installer and maintenance engi-
neer
- BCM instructions booklet
- Warranty
- 2 Spare parts form
- Certicate of conformity
- Testing certicate
- Gas conversion label?
Accessories box containing:
- 5 bends + a T + a plastic condensate draining cap
- External probe
- Storage tank probe
- Cables output sheet metal
- SHC multifunction kit module
- Condensate drain siphon pipe 1 m.
3.4.1 - HANDLING
The boiler must be handled by lifting it from the
holes on the upper plate or using a transpallet.
If it is possible to program replacements, you must provide
for intervention with protective washing equipped with basic
dispersant.
Washing must be carried out four weeks prior to replacement,
with the system operating at 35°C - 40°C
Attention! If the new boiler was replaced in an old system
without having provided for the aforementioned washing cy-
cle, do not start the system since any product residues in the
circuit can, after replacement, ll the generator with residues.
It is recommended to contact a specialised company for water
treatment.
SPK P
depth
(mm)
L
width
(mm)
H
height
(mm)
Net
Weight
(kg)
Weight
Packaging
(kg)
150 1042 780 2010 347+60* 15** + 20***
230 1232 1120 2200 399+80* 43** + 30***
300 1495 1120 2393 459+90* 57** + 30***
400 1495 1120 2393 610+106* 57** + 30***
500 1495 1120 2393 610+106* 57** + 30***
600 1520 1120 2500 755+120* 59** + 35***
(*) casing - (**) pallet - (***) cardboard

18
3.5 - POSITIONING IN THE
BOILER ROOM
Special attention must be paid to the standards and local laws
with regard to boiler rooms, especially the minimum distances
that must be kept free around the boiler.
Installation must comply with the provisions in the most recent
standards and laws in force with regard to boiler rooms, instal-
lation of heating systems and domestic hot water production,
ventilation, suitable chimneys to drain combustion products from
condensate boilers and anything else applicable.
When choosing the place of the installation of the appliance,
follow the safety instructions below:
- Place the appliance in rooms protected from frost.
- Avoid installation in rooms with a corrosive or very dusty
atmosphere.
Comply with the minimum overall dimension dis-
tances
in order to execute normal
maintenance and cleaning operations.
SPK CLEARANCE
H8 (*) H9
150 2109 2300
230 2147 2500
300 2366 2500
400 2690 3000
500 2690 3000
600 2770 3000
(*) Space for combustion chamber opening

19
Technical features and dimensions
ENGLISH
3.6 - FLUE GAS EXHAUST PIPE CONNECTION
To connect the ue gas exhaust pipe, local and national stand-
ards must be observed
In the event the boiler is replaced, ALWAYS replace the ue
gas pipe as well.
The boiler is type approved for the exhaust congurations listed
below:
ATTENTION:

NOTE!
Further details in the section
‘‘Technical Information’’ on the boiler
page of the www.unicalag.it website
HEAD AVAILABLE AT THE BASE OF THE CHIMNEY
D (Drain) I (Intake)
∆p = 100 Pa ∆p = 40 Pa
The maximum permitted length of the pipes is determined
by head (∆p) available at the base of the chimney.
HEAD AVAILABLE AT THE BASE OF THE CHIMNEY
D (Drain) I (Intake)
∆p = 100 Pa -
The maximum permitted length of the pipes is determined
by head (∆p) available at the base of the chimney.
B23P ATTENTION
For this type of connection, the room follows the
same installation rules for boilers with natural
draught.
Connection to a combustion products evacuation pipe outside
the room; the combustion air is taken directly from the room
where the appliance is installed.
C63 ATTENTION
With C63 congurations, you must order
the optional air intake kit, which contains the
installation instructions.
Separate combustion air intake and combustion products
evacuation pipes. (Commercial accessories)
ATTENTION:
for B23P types of connection, the
room follows the same installation rules
for natural draught
boilers.

20
Sc BOILER DRAIN
S.cond CONDENSATION DRAIN
SAFETY VALVE DRAIN
Provide a drain pipe with funnel and a trap that
lead to a suitable drain, in correspondence with
the drain
This drainage must be controlled on sight.
If this precaution is not taken, triggering of the
safety valve can cause damage to persons, an-
imals and objects, for which the manufacturer
cannot be held responsible.
3.7 - CONNECTION
Danger!
The gas connection must be carried out only by
a qualied installer who must respect and apply
that foreseen by relevant laws in force in the local
prescriptions of the supply company. Incorrect in-
stallation can cause damage to persons, animals
and objects for which the manufacturer cannot be
held responsible.
If you smell gas:
a) Do not operate electric switches,
the telephone or any other object that
may cause sparks;
b) Immediately open doors and
windows to create air current
to purify the room;
c) Shut the gas cocks.
To ll the system, you must provide a lling valve on
the heating circuit, or use the optional accessories.
The boiler is equipped with is own draining valve,
Sc. This valve can never be used to drain the system
since all the dirt in the system can accumulate in the
boiler and jeopardise its proper operation. Therefore,
before using the drain valve, make sure the system's
check valve, which is situated under the pump, has
been closed.
The system must be equipped with its own drain
valve, which is to be suitably sized according the
system's capacity.
The mains pressure must be within 0.5 and 6 bar
(in the event of greater pressure install a pressure
reducer).
Attention!
Do not mix the heating water with incorrect
concentrations of antifreeze or anti-corrosion
substances! This could damage the gaskets
and cause noise during operation.
Unical will not be held liable for damage to
persons, animals or objects due to failure to
comply with the above instruction.
SPK CONNECTIONS
G
Gas Inlet
[Inch]
M
Flow
[DN]
R
Return
[DN]
A
Air intake [Ø mm]
S
Flue gas exhaust
fm [Ø mm]
Sm
Air vent connec-
tion
[Inch]
Sc
Condensation drain
[Ø mm]
150 1’’ 65 65 150 200 1’’ DN 40
230 1’’ ¼ 65 65 250 250 1’’ ¼ DN 40
300 1’’ ¼ 80 80 250 250 1’’ ½ DN 40
400 1’’ ½ 80 80 250 300 1’’ ½ DN 40
500 1’’ ½ 80 80 250 300 1’’ ½ DN 40
600 1’’ ½ 100 100 250 300 1’’ ½ DN 40