Ferroli Domina 102 User guide

Appr. nr. B99.06 A - CE 0461 AU 0431
DOMINA 102
COPPER WALL-MOUNTED COMBINATION,
GAS FIRED BOILER FOR CENTRAL HEATING
AND DOMESTIC HOT WATER PRODUCTION,
FAN ASSISTED, ROOM SEALED COMPARTMENT,
ELECTRONIC FLAME IGNITION AND CONTROL
3543837/0 - 06/2001
INSTALLATION, SERVICING AND
USERINSTRUCTIONS
G.C. NO: 47-267-24

DOMINA 102
2
CE MARK
CE mark documents that the Ferroli gas appliances comply with the requirement contained in
European directives applicable to them.
In particular, the appliances comply with the following CEE directives and the technical specifications
provided from them:
• Gas appliances directive 90/396
• Efficiencies directive 92/42
• Low tension directive 73/23 (modified from the 93/68)
• Electromagnetic compatibility directive 89/396 (modified from the 93/68)
Year 2000 Compliance Declaration
We will guarantee that this products is altogether suitable for the data change in the Year
2000 (boiler has no dependence from date change) and that no disruptions will occur which is
caused by this product.
IMPORTANT
Your"benchmark" Installation,CommissioningandService RecordLogBookwill beenclosed
in yourcustomer information pack.
"Thisrecordmustbecompletedandleftwiththeenduser"
"All CORGI RegisteredInstallerscarryaCORGI IDcardandhavearegistration number.Bothshould
berecordedin yourcentral heatinglogbook. Youcan checktheinstaller's CORGI registration
by callingCORGI on 01256 372300".
Ferroli is a member of the Benchmark initiative and fully supports the aims of the programme. Benchmark
has been introduced to improve the standards of installation and commissioning of central heating
systems in the UK and to encourage the regular servicing of all central heating systems to ensure safety
and efficiency. Please see installation and servicing guidelines.
INDEX
1DESCRIPTION 3
2TECHNICAL AND DIMENSIONAL CHARACTERISTICS 4
3 INSTALLATION DETAILS 9
COMMISSIONIN AND TESTIN
ADUSTMENT AND ASCONVERSION 3
MAINTENANCE AND CLEANIN
REPLACEMENT O PARTS
AULTINDIN 3
ELECTRICAL AND NCTIONAL SCHEME39
10 USER INSTRUCTIONS 4

DOMINA 102
3
1DESCRIPTION
1.01 Introduction
The Domina102is definedas a“room sealed” combination boiler, all air requiredfor combustion is takenfrom
outside the room in which it is installed. It is anewhigh performance gas firedheat generator for central heating and
domestic hot waterproduction. Aspecial feature of this boileris its built-in electronic flame ignition and control unit
making burneroperation completely automatic and safe.The main components are as follows:
•Copperheat exchangerconsisting of three finnedtubesspecifically shapedfor high efficiency.
•There are three coppercoils insertedin the three heating circuit tubes. These represent the domestic hot waterheat
exchanger. Their shape and high exchange surface areaenable the full output of the boilerto be absorbed.
•Ceramic fibre insulatedcombustion chamber
•16 stainless steelbladedburners specifically designedfor this boiler.
•Fan for discharge of combustion products and intake of combustion air.
•Differential air pressure switch.For safety reasons, this ensuresthe burnerignitesonly whenthe fan
is functioning correctly.
•Hermetically sealedcompartment made from corrosion-resistant steelenclosing the above components.
•Combination gas safety valve with modulator, complete with pressure stabiliser.
•Flowmetergiving the domestic hot watercircuit precedence overthe central heating circuit.
•Pressure reliefvalve for the central heating circuit setto openat 3bar.
•Built-in Expansion vessel.
•Variable speedpump.
•Central heating flow temperature adjustment thermostat.
•Domestic hot waterflow temperature adjustment thermostat.
•Central heating limit thermostat.
•Overheat safety thermostat.
•Electronic control unit for automatic flame ignition and control.
•Central heating low waterpressure cut off switch.
•Domestic hot waterflow temperature sensor.
•Central heating flow temperature sensor.
•Safety bracket
1.02Instructionsand regulations
Assembly, installation, first start up and maintenance must be carriedout by competent persons only, in accordance
with all current technical regulations and directives.
OSHH
Materials usedin the manufacture of this appliance are non hazardous and no special precautions are
requiredwhenservicing.
Related Documents
Thisappliancemust beinstalled strictlyin accordancewiththese instructions.
The Gas Safety Regulations (Installations &Use)1996.
The Local Building Regulations.
The Building Regulations.
The Buildings Standards (Scotland -Consolidated)Regulations.
British Standards Codesof Practice:
B.S. 75931992 TREATMENT OF WATERINDOMESTIC HOT WATERCENTRALHEATING SYSTEMS
B.S. 55461990 INSTALLATIONOF HOT WATERSUPPLIES FORDOMESTIC PURPOSES
B.S. 5440 Part 12000 FLUES
B.S. 5440 Part 21989 AIRSUPPLY
B.S. 5449 1990 FORCED CIRCULATIONHOT WATERSYSTEMS
B.S. 6798 1987 INSTALLATIONOF GAS FIRED HOT WATERBOILERS
B.S. 68911989 GAS INSTALLATIONS
B.S. 76711992 IEE WIRING REGULATIONS
B.S. 48141990 SPECIFICATIONFOREXPANSIONVESSELS
B.S. 5482 1994 INSTALLATIONOF LPG
ModelWaterBye Laws
For Northern Ireland the rulesin force apply

DOMINA 102
4
Fig. 1
2TECHNICALANDDIMENSIONAL CHARACTERISTICS
2.01 Technical information
Domina 102 boilers are central heating and domestic hot water heat generators and are produced as standard
to function with natural gas or liquid petrolium gas converted.
Key
1 -3/4"central heating flow outlet
2-1/2"domestichot water flow outlet
3-1/2“gasinlet
4-1/2"domestichot water inlet
5-3/4"central heating return inlet
363
75
15 430
760
15
692
460
36 155
95 54 60
2
53
1
60
189
175
13 5
2
Top view
4
4
202
150
Ø80 Ø80 Ø80
120 12070
Bottom view

DOMINA 102
5
N.B. - The gas pressures at the burner and gas flows during the central heating phase given in the table refer
to nominal boiler output.To reduce this output (where necessary), gas pressure must be reduced untilthe
required output levelis reached (see figures 4and 5).
During domestic hotwater production,gas pressures to the burner must correspondtothe maximum
outputgiven in table forthe type ofgas.
Gas pressure must beadjustedduring maximum draw-off ofdomestic hotwater.
•Maximum working temperature forcentral heating flow:85°C
•Maximum temperature ofdomestic hotwater:55°C, adjustable between 40°C and55°C.
•Minimum domestic coldwater pressure requiredfor95% heat input:
- Flowrestrictorfitted(standard)- 1,2 bar;
- Flowrestrictorremoved- 0,5 bar
TechnicalData
MODEL Heat output Heat input
Net
Domestic hot
water heat
input
Gross
Boiler water
contents
Domestic hot
water circuit
contents
kW kW kW kW kW Litres Litres
Domina 102 30,0 12,7 33,1 14,5 30,0 1,5 0,8
MODEL
Connections Expansion vessel
Max. working
pressure
central
heating
circuit
Max.
working
pressure hot
water circuit
12345Capacity Pre-pressurising
value
ØØØØØLitres bar bar b
Domina 102 3/4” 1/2” 1/2” 1/2” 3/4” 10 1 3 6
MODEL
Main injectors (mm) Gas flow rates to main burners
for central heating Gas valve
Ø1/2”
G20 - NG G31 - LPG G20 - NG G31 - LPG
ØØ m
3/h kg/h
Domina 102 16x1,25 16x0,75 3,5 2,6 H. V K4105G
MODEL
Gas supply pressures
working Gas pressure at main burner for central heating
Safety valve
G20 - NG G31 - LPG G20 - NG G31 - LPG
min. max. min. max.
mbar mbar mbar mbar mbar mbar bar
Domina 102 20 31 2,5 13,0 7,0 35,5 3
MODEL
Domestic hot
water production
with ∆t 30°C
Domestic hot
water production
with ∆t 35°C
Max. working
pressure domestic
hot water Protection
level
Weight
G20 - NG G31 - LPG
l/min. l/min. mbar mbar kg
Domina 102 14,3 12,3 13,0 35,5 IP44 48

DOMINA 102
6
2.03 Boiler water flow diagram2.02 Boiler maincomponents
Key
5 Room sealed compartment
7Gas inlet
8Domestic hot water outlet
9Domestic hot water inlet
10 Central heatingflowoutlet
11 Central heatingreturn inlet
14Safetyvalve
16Fan
19Combustion chamber
20Burner assembly
21Main injector
22 Burner
26Combustion chamber insulation
27Copper heat exchanger for central
heatingand domestic hot water
28Flue collector from heat exchanger
29Internal flue exit
32Central heatingpump
34Central heatingflowtemperature sensor
36Automatic air vent valve
Fig.2
Fig.3
818222
29 43187
RESET
OFF
ON
0
5
1
234
6
bar
98 63 157 145
°C°C
62
IN OUT
MIN
GRUNDFOS
FERROLI
114
34
20
21
90
50
16
28
32
26
19
49
132
5
56
27
91
10 8 784 85 44 136 14 42 9 11
36
OUT
IN
MIN
AIR
IN
AIR
IN
FLUE
OUT
C.H.
OUT D.H.W. OUT GAS IN D.H.W. IN C.H. IN
42Domestic hot water flow
temperature sensor
43Air pressure switch
44 Gas valve
49Safetyoverheat thermostat
50Central heatingflowlimit thermostat
56Expansion vessel
62Time clock(option)
63Central heatingtemperature adjustment
81Ignition electrode
82Sensor electrode
84Primarygas valve solenoid
85Secondarygas valve solenoid
90*Flue outlet test point
91*Air test point
98On/Off/Reset switch
114Lowwater pressure cut off switch
132Flue gas deflector
136Flowmeter
145Central heatingpressure gauge
157Domestic hot water temperature adjustment
187Restrictor
*For use withflue gas analyser

DOMINA 102
7
2.05 Pump characteristics
The pump head available for circulating the water
is given in fig. 6.
N.B. -The pump is factoryset at position 3. The pump
is a Grundfos type 15-50 UPS series.
Grundfos Pump performance graph
Note -Minimum flow through boiler heat exchanger at
anytime should not fall below 6 litres per minute.
If the total volume of water in the system exceeds 40
litres an additional expansion vessel must be fitted to
the central heating return pipe.
Pump performance curve Grundfos UPS15-50
Fig. 6
12 3Speed settings
ABoilers pressure drop
BAvailable pump head C.H.
2.04Centralheatingadjustment (not normallyrequired)
To adjust boiler heat input (thus also regulating heat output to the central heating water)simplyadjust the main
burner via the electronic control board (fig. 4,5and see paragraph 5.04page 24).
The diagrams indicate the variation in heat output to the water as burner working pressure is varied.
Adjusting boiler output to the actual requirements of the central heating system will minimise boiler cycling thus saving
fuel,varying the output has virtuallyno effect on the efficiencyand combustion characteristics of the boiler.
Diagram ofpressures
and outputs with Naturalgas
Fig. 4Fig. 5
Diagram ofpressures and outputs
with LPG(Propane)
2
3
4
5
6
7
8
9
10
11
12
13
12 13 14 15 16 17 18 19 20 21 22 23 24
11 12 13 14 15 16 17 18 19 20 21
kW
kcal/h
x 1000
mbar
14
25 26 27 28 29 30 31
22 23 24 25 26
kW
kcal/h
X 1000
m
b
ar
18 19 20 21 22 23
5
10
15
20
25
30
35
12 13 14 15 16 17
11 12 13 14 18 19 2015 16 17
25 26 27 28 29 3024
21 25 2622 23 24

DOMINA 102
8
SIZING OF ADDITIONAL EX PANSION VESSELS:
Deduct from the value given in the table the 10
litre vessel supplied.
Note:
1. Fill C.H.installation to min. 1.5bar.
2.Expansion vessel must be fitted to central
heating return pipe.
3.The standard 10 litre expansion vessel is
charged to 1bar.
4.The additional expansion vessel should be
charged to 1bar.
SAFETYVALVE
SETTING (bar)
VESSEL CHARGE
PRESSURE (bar)
INITIAL SYSTEM
PRESSURE (bar)
TOTAL WATER
CONTENT ofSYSTEM
3.0
0.51.0 1.5
1.0 1.52.0 1.52.0 2.0
EX PANSION VESSEL VOLUME (litres)
LITRES
253.56.513.74.710.38.3
507.0 12.927.59.520.616.5
7510.519.441.314.230.924.8
100 14.0 25.955.1 19.0 41.233.1
12517.532.468.923.751.541.3
15021.0 38.882.628.561.849.6
17524.545.396.433.272.1 57.9
200 28.0 51.8110.238.0 82.466.2
0.1400.2590.5510.1900.4120.33
Forsyst.volumesotherthan
thosegivenabove,mult.thesyst.
volumebythefactoracross
Fig. 7
Pressureloss diagram
m |h
3
Q
8
7
6
5
4
3
2
1
00.5 1.5 2.512
Hmbar x 100

DOMINA 102
9
3 INSTALLATION DETAILS
Gas Safety (Installation & Use) Regulations: 1996
In the interest of safety, it is the law that all gas appliances are installed by a competent person in accordance
with the above Regulations, Building Regulations/Building Standards Scotland, Codes of Practice, current I.E.E.
Regulations and the byelaws of the Local Water Undertaking. Failure to comply with the Regulations may lead to
prosecution; it is your responsibility to ensure that the law is complied with.
N.B. For Northern Ireland the rules in force apply.
Important -If the boiler is to be fitted in a timber framed buildingit should be fitted in accordance with the Institute of
Gas Engineers document IGE/UP/7. If in doubt advice should be sought fromthe Local Supplier.
Location of Boiler
The installation of the Domina 102 must be on a suitable non-combustible load bearingwall which will provide
an adequate fixingfor the boiler mountingsafety bracket assembly. The location should be in an area where
the water pipes will not be subjected to frost conditions. In sitingthe combination boiler the following
limitations must be observed:
The combination boiler may be installed in any roomor internal space,although particular attention is drawn
to the requirements of the current I.E.E. wiringregulations and in Scotland the electrical provisions of the
buildingregulations applicable in Scotland,with respect to the installation of the combination boiler in a room
or internal space containinga bath or shower.
Where a roomsealed appliance is installed in a roomcontaininga bath or shower any electrical switch
or appliance control utilisingmains electricity must be situated so that it cannot be touched by a person
usingthe bath or shower.
Air Supply
The roomor compartment in which the boiler is installed does not require a purpose provided vent when
usingthe standard concentric flue.
Flue System
The boiler allows the flue outlet to be taken fromthe rear of the boiler,fromeither side or vertically.
Astandard flue length of 0.75metres is provided. Alternative lengths of two or three metres can be supplied
(equivalent to wall thicknesses of up to 565,1815 and 2815mm for rear flues,deduct 91mm plus distance fromside
wall for side outlet flues). It is absolutely essential, to ensure that products of combustion discharging from the
terminal cannot re-enter the building, or enter any adjacent building, through ventilations, windows, doors,
natural air infiltration or forced ventilation/air conditioning.
Gas Supply
If necessary the local Gas supplier should be consulted,at the installation planningstage,in order to establish
the availability of an adequate supply of gas.
An existingservice pipe must not be used without prior consultation with the Local Gas supplier.
Agas meter can only be connected by the Local Gas supplier,or by a Local Gas suppliers Contractor.
Installation pipes should be fitted in accordance with BS6891-1988.
Appliance inlet workingpressure must be 20mbar MINIMUM,for NGand 37mbar minimumfor LPG.
Pipeworkfromthe meter to the combination boiler must be of an adequate size.
The boiler requires 3.5m3/h of natural gas,and 2.60 kg/h of LPG.
Do not use pipes of a smaller size than the combination boiler inlet gas connection.
The complete installation must be tested for gas soundness and purged as described in BS6981-1988. All pipework
must be adequately supported. An isolatinggas valve is provided and should be fitted on the boiler gas inlet.
Please wait 10 minutes when lightingfromcold before checkinggas rate. Gas pressures should be checked after
the boiler has operated for 10minutes to reach thermal equilibrium.
Water System
Note -the boiler is designed for sealed systems only and must NOT be used on open vented systems.

DOMINA 102
10
Central Heating
Detailed recommendations are given in BS6798, BS5449, BS6700 and CP342 Part 2. Pipework not forming part
of the useful heating suface should be insulated to prevent any heat losses or possible freezing (i.e. in roof spaces
or ventilated underfloor spaces). Drain taps should be positioned at the lowest point of the system in accessible
locations to permit the whole system to be drained down. The drain taps should be in accordance with BS2879. Copper
tubing to BS2871, Part 1 is recommended for water carrying pipework. Pipework in horizontal runs should have a
gradient where possible to facilitate the removal of air. Ensure that the boiler heat exchanger is not a natural point for
air collection. A typical heating system with domestic hot water circuit is illustrated in fig. 8.
Important -If thermostatic radiator vales are fitted a bypass must be fittedtoensure a minimumflowrate through
the boiler of6l/min. The bypass should be fitted as far as possible from the boiler.
Make UpWater
Provision must be made for replacing water lost from the sealed system. Reference should be made to BS6798,
for methods of filling and making up sealed systems. There must be no direct connection between the boiler's
central heating system and the mains water supply. The use of mains water to charge and pressurise the system
directly, is conditional upon the Local Water Byelaws. Again any such connection must be disconnected after use.
A typical temporary filling loop is shown in fig. 9.
DomesticHot Water
Always fit a scale reducer in "hard water areas"(18 clarke degrees or over)". A 15mm copper connection point on the
boiler for attaching to the main supply is provided. The maximum domestic water pressure for the inlet supply is 10 bar
(145 P.S.I.). Ifthe coldmainssupplyexceeds 5bar (72 P.S.I.), a water governor or pressure reducing valve must be
fittedby the installer into the mains supply in an inconspicuous but accessible position preferable between 3 and 5 metres
(10-16ft) before the appliance. Such a valve must be approved by the Water Research Council.
Attention -is drawn to the Model Water Byelaws.
Fittings manufactured from duplex (alpha-beta) brass are not acceptable for underground use and certain water
undertakings will not accept their use above ground.
Ensure all pipework is adequately supported
NOTE: A bypass must be fitted as far as possible
from the boiler if thermostatic radiator valves are
fitted thoughout.
Fig. 8
Gas
Cold water
Additional expansion
vessel C.H. (if required)
Filling
point C.H.
Bypass
Key
1.Filling point C.H.
2. Temporary connection
3.Cold water supply Fig. 9