Riello Tregi NK Series User guide

INSTALLATION, USER-OPERATION, MAINTENANCE
AND SYSTEM MANAGEMENT MANUAL
CAST IRON
BOILERS
g N
g NK

2
r g boilers conform to the Efficiency Directive 92/42/EEC.
When used in conjunction with a CE marked jet burner, they also satisfy the requirements of the
Gas Directive 2009/142/CE and applicable sections of the Electromagnetic Compatibility Directive
2004/108/CE and Low Voltage Directive 2006/95/CE.
0694
MODEL CODE
g3 N 4040719
g4 N 4040720
g5 N 4040721
g6 N 4040722
g7 N 4040723
g8 N 4040724
g9 N 4040725
g10 N 4040726
g3/100 NK 4040727
g4/100 NK 4040728
g5/100 NK 4040729
g6/100 NK 4040730
g7/100 NK 4040731
g8/100 NK 4040732
g3/60 NK 4040733
g4/60 NK 4040734
CONFORMITY
RANGE

3
Dear Customer,
Thank you for choosing a r g boiler, a modern, high quality and high efficiency product that
will assure you maximum comfort over a long period, with high reliability and safety. Arrange for the
boiler to be serviced regularly by an authorised rTechnical Assistance Centre. Their personnel
are specially trained to keep your boiler efficient and cheap to run. Technical Assistance Centres
also stock any original spare parts that might be required.
This instruction manual contains important instructions and precautions that must be observed to
ensure the trouble-free installation and efficient functioning of your rg boiler.
Please accept our renewed thanks for your purchase.
Riello S.p.A.

CONTENTS
4
GENERAL
General safety information pag. 5
Precautions “ 5
Product description “ 6
Control panel “ 9
Functional wiring diagram “ 11
Recommended burners “ 13
Identification “ 14
Data plate “ 14
Technical specifications “ 15
Accessories “ 17
USER - SYSTEM MANAGER
Start up pag. 17
Temporary shutdown “ 18
Preparing for extended periods of disuse “ 19
Cleaning “ 19
Maintenance “ 20
Useful information “ 20
INSTALLER
Unpacking the product pag. 21
Overall dimensions and weights “ 22
Handling “ 24
Place of installation “ 25
Installation in older systems and systems
requiring modernisation “ 25
Water connections “ 25
Fitting the casing panels “ 29
Wiring “ 31
Combustion gas exhaust “ 34
Filling and emptying the system “ 35
TECHNICAL ASSISTANCE SERVICE
Preparing for first start-up pag. 37
Initial start-up “ 37
Checks during and after initial start-up “ 39
Temporary shutdown “ 40
Preparing for extended periods of disuse “ 40
Maintenance “ 41
Cleaning the boiler “ 42
Cleaning the storage cylinder “ 43
Troubleshooting “ 44
CONTENTS
This manual, Code 068645EN - Rev. 7(12/13) is made
up of 48 pages.
The following symbols are used in this manual:
bCAUTION = Indicates actions that require cau-
tion and adequate preparation
aSTOP = Identifies actions that you MUST NOT do

GENERAL 5
a Do not allow children or infirm persons to operate
this gboiler unsupervised.
a Do not operate any electrical devices or equipment,
including switches or domestic appliances, etc., if you
can smell fuel or fumes. If you detect any suspicious
smells:
- Ventilate the room by opening all doors and win-
dows;
- Close the fuel shut-off cock;
- Report the fault immediately to the rTechnical
Assistance Service or a professionally qualified hea-
ting engineer.
a Do not touch the boiler while barefoot or wet.
a Never clean or service the boiler without first discon-
necting it from the mains electricity supply by tur-
ning the main power switch off and turning the main
function selector to OFF (I).
a Do not tamper with or adjust the safety or control
devices without prior authorisation and instructions
from the boiler’s manufacturer.
a Never pull, disconnect, or twist the electrical cables
coming from the boiler even if it is disconnected
from the mains electricity supply.
a Do not obstruct or restrict the vents in the room
where the boiler is installed. Adequate ventilation is
essential for correct combustion.
a Do not expose the boiler to the elements. Do not
install the boiler outdoors. It is not designed to work
outdoors and is not fitted with the necessary auto-
matic frost protection systems to do so.
a Do not switch the boiler off if outdoor temperature
drops below ZERO (risk of freezing).
a Do not store flammable substances or packaging in
the room where the boiler is installed.
a Do not dispose of packaging material into the envi-
ronment, or leave it within the reach of children,
since it can become a potential hazard. Dispose of
packaging material in compliance with applicable
legislation.
The operation of any appliance that uses fuel, electrical power and water demands that a number of fundamental safe-
ty precautions be respected. In particular:
b The boiler is delivered in a single crate. Check
that the appliance is complete and undamaged as
soon as you receive it. Report any discrepancies or
damage to the rdealer who sold it.
b This gboiler must be installed by a legally qua-
lified installer. On completion of the installation, the
installer must issue the owner with a declaration of
conformity confirming that the installation has been
completed to the highest standards in compliance
with the instructions provided by rin this instruc-
tion manual, and that it conforms to all applicable
laws and standards.
b The boiler must only be used for the purpose speci-
fied by rand for which it is designed. The manu-
facturer declines all responsibility, contractual or
other, for damage to property or injury to persons or
animals caused by improper installation, adjustment,
maintenance or use.
b If you notice any water leaking from the boiler, shut
off the water supply and notify your local r
Technical Assistance Centre or a qualified heating
engineer immediately.
b Periodically check that working pressure in the hea-
ting circuit is over 1 bar but below the maximum limit
specified for the appliance. If this is not the case,
contact r’s Technical Assistance Service or a
professionally qualified heating engineer.
b If the boiler is not going to be used for an extended
period of time, perform at least the following opera-
tions:
- Turn the appliance’s main function selector to posi-
tion (I) “Off”
- Turn the main power switch OFF
- Close the fuel cock and heating circuit water cock
- Drain the central heating circuit if there is any risk of
freezing.
b The boiler must be serviced at least once a year.
b This instruction manual is an integral part of the boi-
ler. It must be kept safe and must ALWAYS accom-
pany the boiler, even if it is sold to another owner or
transferred to another user or to another installation.
If you damage or lose this manual, order a replace-
ment immediately from your local rTechnical
Assistance Centre.
GENERAL SAFETY INFORMATION
PRECAUTIONS

GENERAL
6
r g cast iron boilers are high efficiency, triple
flue pass boilers with a horizontal combustion chamber
for central heating only (g N) or for central heating
and domestic hot water production when equipped with
a 100 or 60 litre vitrified storage cylinder (g NK).
The most important technical features of these boilers are:
- The combustion chamber and heat exchange system
are specially designed and shaped to achieve the best
possible volume ratio.
- Only top quality materials, including special MB18C
cast iron, are used to ensure a long working life.
The boiler body is thoroughly insulated with a layer of
high density glass wool.
The boiler's front door can be opened completely to
facilitate the inspection, maintenance and cleaning of
internal parts and to speed up servicing in general.
If equipped with an optional total shutdown control card,
r g boilers can implement total shutdown logic
and save energy as follows:
- g Nmodels only start up if the heating system
requests heat (i.e. when the room thermostat switches
the heating on).
- When the Summer/Winter selector is set to Summer
mode g NK, models apply total shutdown logic
and save energy by starting up only when a domestic
hot water tap is opened.
Both types of boiler have an overtemperature dispersal
function to disperse the heat left by thermal inertia.
1 - Central heating flow
2 - Flue gas exhaust
3 - Boiler body
4 - Central heating return
5 - Control panel
6 - Sensor socket
7 - Casing
8 - Burner
9 - Drain cock
16
5
7
8
9
2
3
4
g 3 ÷ 8 N
1
2
3
4
5
6
9
7
8
g 9 - 10 N
PRODUCT DESCRIPTION

GENERAL 7
12
13
1
2
3
4
5
6
7
8
15
14
16
9
10
11
g 3/100 - 4/100 NK g 5/100 ÷ 8/100 NK
1
12
13
15
14
16
2
5
7
3
4
9
10
11
6
8
1 - Control panel
2 - Automatic vent valve
3 - Non-return valve
4 - Storage cylinder pump
5 - Storage cylinder drain cock
6 - Boiler sensor socket
7 - Burner
8 - CH drain cock
9 - Storage cylinder (100 l)
10 - Boiler body
11 - Casing
12 - Domestic cold water inlet
13 - Magnesium anode
14 - Storage cylinder sensor socket
15 - Domestic hot water recirculation
16 - Domestic hot water outlet

GENERAL
8
g 3/60 - 4/60 NK
1 - Control panel
2 - Non-return valve
3 - Storage cylinder drain cock
4 - Boiler sensor socket
5 - Burner
6 - CH drain cock
7 - Storage cylinder (60 l)
8 - Automatic vent valve
9 - Storage cylinder pump
10 - Boiler body
11 - Casing
12 - Domestic hot water outlet
13 - Magnesium anode
14 - Storage cylinder sensor socket
15 - Domestic cold water inlet
12
1
2
3
4
5
6
13
14
15
7
8
9
10
11

GENERAL 9
20
40
60
80
100
0120
1
2
3
4
5
7
6
1 - Function selector
IOff
II On
III On
IIII Automatic mode (only active with temperature control kit installed)
2 - Boiler temperature gauge
Displays the temperature of the central heating water.
3 - Boiler thermostat
Allows you to set the temperature of the central heating water.
4 - Electrical power indicator (green)
Lights to show that the boiler is receiving electrical power.
5 - Burner lockout indicator (red)
Lights to show that the burner lockout has tripped.
6 - Function indicators
7 - Manual reset for safety thermostat
Allows you to reset the boiler if the safety thermostat trips.
Unscrew the protective cover to access the reset button.
g N
CONTROL PANEL

GENERAL
10
20
40
60
80
100
0120
1
3
4
5
8
7
6
9
10
20
40
60
80
100
0120
2
1 - Function selector
IOff
II On
III On
IIII Automatic mode (only active with temperature control kit installed)
2 - Boiler temperature gauge
Displays the temperature of the central heating water.
3 - Boiler thermostat
Allows you to set the temperature of the central heating water.
4 - Electrical power indicator (green)
Lights to show that the boiler is receiving electrical power.
5 - Burner lockout indicator (red)
Lights to show that the burner lockout has tripped.
6 - Summer (I) / Winter (II) selector
7 - Storage cylinder temperature gauge
Displays the temperature of the domestic hot water.
8 - Manual reset for safety thermostat
Allows you to reset the boiler if the safety thermostat trips.
Unscrew the protective cover to access the reset button.
9 - Storage cylinder thermostat
Allows you to set the temperature of the domestic hot water.
10- Function indicatorsFunction indicators
g NK

GENERAL 11
LV
FU
1
2
3
4
5
6
7
8
9
10
11
12
CO1
LR
2
1
C
TR
A
4
D
1
C 3 B 2
COM.G.
CO1A
L1 NPE
LNPE
TA TA LPI NPI PE
PI
2
1
C
TS
L1 PE NT1T2S3B4MB
MO1
K1
230V~50Hz
RE
DAI
CC
NC
S3
T2
N
NC
COM.G. - 4 position function selector
LV - Mains power indicator
LR - Burner lockout indicator
TS - Safety thermostat (110°C 0/-6) (*)
TR - Boiler control thermostat (33-82°C ±3) (*)
FU - Mains power fuse 6.3 A-T
CO1-CO1A - Multi-connectors
MO1 - Terminal strip
MB- 7 pin burner connector
PI - Central heating pump (not supplied)
DAI - Automatic shut-off device (not supplied; only where required). The automatic shut-off device (DAI) and
the relay (RE) must be suitable for a 230 VAC power supply.
RE - Relay (not supplied)
(*) Homologated
g N
FUNCTIONAL WIRING DIAGRAM
Power supply

GENERAL
12
LV
FU
LR
2
1
C
TR TL2TL1
A
4
D
1
C 3 B 2
COM-G.
4
D
3
1 B 2
COM-E/I
1
2
3
4
5
6
7
8
9
10
11
12
2
1
C
TB
2
1
C
TS
NPB
1
2
3
4
5
6
7
8
9
LPBPENPILPIPE
PBPI
L1 PE NT1T2S3S4
7
1 4
1011
K1
MB
2
1
C
2
1
C
CO1CO1A
CO2CO2A
MO1
L1 NPE
LNPE
TA TA
230V~50Hz
RE
DAI
CC
NC
S3
T2
N
NC
COM.E/I - Summer/Winter selector
COM.G. - 4 position function selector
FU - Mains power fuse 6.3 A-T
LR - Burner lockout indicator
LV - Mains power indicator
CO1-CO1A - Multi-connectors
CO2-CO2A - Multi-connectors
MO1- Terminal strip
MB - 7 pin burner connector
TB - Storage cylinder thermostat (0-70°C ±3)
TL1 - Maximum temperature thermostat (82°C)
TL2 - Overtemperature dispersal thermostat (90°C)
TR - Boiler control thermostat (33-82°C ±3) (*)
TS - Safety thermostat (110°C 0/-6) (*)
PI - Central heating pump (not supplied)
PB - Storage cylinder pump
DAI - Automatic shut-off device (not supplied; only where required). The automatic shut-off device (DAI) and the
relay (RE) must be suitable for a 230 VAC power supply.
RE - Relay (not supplied)
(*) Homologated
g NK
Power supply

GENERAL 13
The burners recommended to obtain the best possible performance from gboilers are:
b See the instruction manual provided with the burner for further information on:
- Burner installation
- Electrical connections
- Burner adjustments.
IMPORTANT
If you are installing a new boiler but re-using an old bur-
ner, always perform the following checks:
- Make sure that the performance of the old burner is
adequate for the requirements of the boiler
- Make sure that the length and diameter of the bur-
ner’s blast tube are suitable for the boiler’s combustion
chamber.
BURNER g BOILER
MODEL CODE 3N / 3NK 4N / 4NK 5N /5 NK 6N / 6NK 7N / 7NK 8N / 8NK 9N 10N
G
A
S
GULLIVER BS1 3761112 • • •
GULLIVER BS2 3761212 • • •
O
I
L
GULLIVER RG 0.R 3736500 •
GULLIVER RG 0.3 3735900 •
GULLIVER RG 1 NR 3736405 • •
GULLIVER RG 1 RK 3736210 • •
GULLIVER RG 2 3737700 • • • •
REG 3 3772100 •
REG 5 3772200 • •
GULLIVER RG 2 KD 3738100 •
RECOMMENDED BURNERS

GENERAL
14
Boilers are identified by two plates:
- Data plate
This lists the technical specifications and performance of the product.
- Serial number plate
This is located on the boiler body and specifies the serial number, model, working pressure and rated heat
input.
bIf these plates or any other means of clearly identifying the product are defaced, removed or lost, proper installa-
tion and servicing may be rendered difficult
g Ng NK
IDENTIFICATION
DATA PLATE
DHW system
Central heating system
Qn Rated heat input
Pn Rated useful heat output
IP Index of protection
Pmw Maximum working pressure,
DHW system
Pms Maximum working pressure,
central heating system
TTemperature
ηEfficiency
DSpecific flow rate
European Directive
92/42/EEC:
Pms= bar T = °C
Qn(min)=
Pn(min)=
T067676GE
TIPO/TYP/TYP:
COMBUSTIBILE/COMBUSTIBLE/BRENNSTOFF/BRANDSTOF:
Qn(max)=
Pn(max)=
Mod.
Cod.
N°
kW
kW
kW
kW kW
D= l/minkW
kW
kW
Pmw= bar T = °C
IP
WV~Hz
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
T067676GE
Mod. Cod. N°
Qn(max) kW
Pn(max) kW
bar
Pms
RIELLO S.p.A. Via Ing.Pilade Riello 7 37045
Legnago (VR) - ITALY
η =
η =
η =
η =
PAESE DI DESTINAZIONE/PAYS DE DESTINATION/BESTIMMUNGSLAND/ LAND VON BESTEMMING:
European Directive
92/42/EEC:
Pms= bar T = °C
Qn(min)=
Pn(min)=
T067676GE
TIPO/TYP/TYP:
COMBUSTIBILE/COMBUSTIBLE/BRENNSTOFF/BRANDSTOF:
Qn(max)=
Pn(max)=
Mod.
Cod.
N°
kW
kW
kW
kW kW
D= l/minkW
kW
kW
Pmw= bar T = °C
IP
WV~Hz
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
T067676GE
Mod. Cod. N°
Qn(max) kW
Pn(max) kW
bar
Pms
RIELLO S.p.A. Via Ing.Pilade Riello 7 37045
Legnago (VR) - ITALY
η =
η =
η =
η =
PAESE DI DESTINAZIONE/PAYS DE DESTINATI ON/BESTIMMUNGSLAND/LAND VON BESTEMMING:
European Directive
92/42/EEC:
Pms= bar T = °C
Qn(min)=
Pn(min)=
T067676GE
TIPO/TYP/TYP:
COMBUSTIBILE/COMBUSTIBLE/BRENNSTOFF/BRANDSTOF:
Qn(max)=
Pn(max)=
Mod. Cod. N°
kW
kW
kW
kW kW
D= l/minkW
kW
kW
Pmw= bar T = °C
IP
WV~Hz
RIELLO S.p.A. Via Ing.Pilade Riello 7 37045
Legnago (VR) - ITALY
T067676GE
Mod.
Cod.
N°
Qn(max) kW
Pn(max) kW
bar
Pms
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
η =
η = η =
η =
PAESE DI DESTINAZIONE/PAYS DE DESTINATI ON/BESTIMMUNGSLAND/LAND VON BESTEMMING:

GENERAL 15
bThe stack must guarantee the minimum draught specified by applicable technical standards, assuming zero pres-
sure at the connection to the flue gas exhaust.
bValues obtained with rModelli GULLIVER RG burners with CO2= 12,5% and GULLIVER BS burners with CO2
= 9,5%.
DESCRIPTION MODEL g N
345678910
Fuel gas / oil
Rated heat input Minimum 16,3 27,2 36,0 46,1 55,0 63,0 - - kW
Maximum 26,5 34,8 44,3 53,1 62,0 70,0 80,0 92,0 kW
Rated useful heat output Pn Minimum 14,9 25,0 33,0 42,3 50,0 57,6 - - kW
Maximum 23,9 31,5 40,2 48,2 56,2 63,8 72,5 83,5 kW
Useful efficiency at Pn Minimum 91,4 91,9 91,7 91,8 90,9 91,4 - - %
Maximum 90,2 90,5 90,7 90,8 90,6 91,1 90,63 90,76 %
Useful efficiency at 30% max. Pn 90,9 91,3 91,6 92,0 91,8 92,0 90,3 90,5 %
Constant pressure drop 2,3 1,8 1,3 1,2 1,0 0,9 0,78 0,70 %
Flue gas temperature (∆T) > 140 196 202 °C
Maximum flue gas flow rate (gas/oil) 0,010 0,013 0,017 0,020 0,024 0,027 0,033 0,037 Kg/s
Furnace pressure Minimum 0,03 0,12 0,17 0,26 0,33 0,47 - - mbar
Maximum 0,10 0,17 0,26 0,36 0,42 0,60 0,23 0,28 mbar
Furnace volume 16 22 28 34 40 46 49 57 dm3
Total volume of flue gas side 22 31 39 47 55 63 - - dm3
Total surface area for heat exchange 0,93 1,30 1,67 2,04 2,41 2,78 2,61 3,00 m2
Volumetric heat load 1656 1582 1582 1562 1550 1522 1632 1614 kW/m3
Specific heat load 25,7 24,2 24,1 23,6 23,3 22,9 27,8 27,8 kW/m2
Maximum working pressure 4 bar
Safety thermostat trip temperature 110 °C
Maximum working temperature 82 °C
Minimum admissible water return temperature 35 40 °C
Pressure drop ∆T 10°C 4 6 10 14 20 26 29 34 mbar
Pressure drop ∆T 20°C 1,2 1,6 2,5 3,5 5,0 7,0 8,0 9,0 mbar
Water capacity 13,7 17,2 20,7 24,2 27,7 31,2 42,0 47,0 l
Turbulators 5 5 2 2 - - 4 4 n°
Index of protection X0D IP
TECHNICAL SPECIFICATIONS

GENERAL
16
bThe stack must guarantee the minimum draught specified by applicable technical standards, assuming zero pres-
sure at the connection to the flue gas exhaust.
bValues obtained with rGULLIVER RG burners with CO2= 12,5% and GULLIVER BS burners with CO2= 9,5%.
DESCRIPTION MODEL g NK
3/100 4/100 5/100 6/100 7/100 8/100 3/60 4/60
Fuel Gas / oil
Heat input at furnace Minimum 16,3 27,2 36,0 46,1 55,0 63,0 16,3 27,2 kW
Maximum 26,5 34,8 44,3 53,1 62,0 70,0 26,5 34,8 kW
Rated useful heat output Pn Minimum 14,9 25,0 33,0 42,3 50,0 57,6 14,9 25,0 kW
Maximum 23,9 31,5 40,2 48,2 56,2 63,8 23,9 31,5 kW
Useful efficiency at Pn Minimum 91,4 91,9 91,7 91,8 90,9 91,4 91,4 91,9 %
Maximum 90,2 90,5 90,7 90,8 90,6 91,1 90,2 90,5 %
Useful efficiency at 30% max. Pn 90,9 91,3 91,6 92,0 91,8 92,0 90,9 91,3 %
Constant pressure drop 2,3 1,8 1,3 1,2 1,0 0,9 2,3 1,8 %
Flue gas temperature (∆T) > 140 °C
Maximum flue gas flow rate (gas/oil) 0,010 0,013 0,017 0,020 0,024 0,027 0,010 0,013 Kg/s
CO2(gas/oil) 9,5/12,5 %
Furnace pressure Minimum 0,03 0,12 0,17 0,26 0,33 0,47 0,03 0,12 mbar
Maximum 0,10 0,17 0,26 0,36 0,42 0,60 0,10 0,17 mbar
Furnace volume 16 22 28 34 40 46 16 22 dm3
Total volume of flue gas side 22 31 39 47 55 63 22 31 dm3
Total surface area for heat exchange 0,93 1,30 1,67 2,04 2,41 2,78 0,93 1,30 m2
Volumetric heat load 1656 1582 1582 1562 1550 1522 1656 1582 kW/m3
Specific heat load 25,7 24,2 24,1 23,6 23,3 22,9 25,7 24,2 kW/m2
Maximum working pressure 4 bar
Safety thermostat trip temperature 110 °C
Maximum working temperature 82 °C
Minimum admissible water return temperature 35 °C
Pressure drop ∆T 10°C 4 6 10 14 20 26 4 6 mbar
Pressure drop ∆T 20°C 1,2 1,6 2,5 3,5 5,0 7,0 1,2 1,6 mbar
Water capacity 13,7 17,2 20,7 24,2 27,7 31,2 13,7 17,2 l
Turbulators 5 5 2 2 - - 5 5 n°
Index of protection X0D IP
(*)Inlet water temperature 13°C; average outlet temperature 43°C.
- Performance obtained with fill pump at maximum speed.
STORAGE CYLINDER
CHARACTERISTICS
MODEL g NK
3/100 4/100 5/100 6/100 7/100 8/100 3/60 4/60
Storage cylinder type Vitrified
Cylinder layout Vertical
Heat exchanger layout Vertical
Power consumption 23,8 31,3 31,3 31,3 31,3 31,3 23,2 30,9 kW
Storage cylinder capacity 100 60 l
Coil water capacity 6,9 6,6 l
Heat exchanger surface area 1,10 1,01 m2
Domestic hot water production with ∆T 35°C 585 770 770 770 770 770 570 760 l/h
Water draw in 10' with storage cylinder at 48°C (*) 160 170 185 185 185 185 115 125 l
Water draw in 10' with storage cylinder at 60°C (*) 210 230 230 230 230 230 140 150 l
Replenishment time with ∆T 35°C 14 10 11 11 11 11 12 10 min
Maximum working pressure 7 bar 7 bar

17
USER - SYSTEM MANAGER
Have r’s Technical Assistance Service start-up your gboiler for the first time. Once this has been done, the
boiler can be left to function automatically. Under certain circumstances, such as after long periods of disuse, the ser-
vice engineer responsible for the boiler may need to re-start it without involving the Technical Assistance Service. To do
so, perform the following checks and operations:
- Check that the gas cock and heating water cock are
open
- While the system is still cold, check that working pres-
sure in the heating circuit is over 1 bar but below the
maximum limit specified for the boiler. If this is not the
case, contact r’s Technical Assistance Service.
- Set the room thermostat to the required temperature
(~20 °C) or, if the system has a timer, make sure that
this is switched “On” and adjusted to the required tem-
perature (~20 °C).
- Turn the system's main power switch ON
- Adjust the boiler and storage cylinder thermostats (NK
models) to about the middle of the section with three
lines
0
23
5
6
4
1
20
40
60
80
100
0120
20
40
60
80
100
0120
20
40 60 80
100
4
321
0
0120
START UP
ACCESSORIES
The following accessories are available, to be ordered separately.
ACCESSORY CODE
Temperature control interface kit 4047331
Total shutdown control card kit 4047318

18 USER - SYSTEM MANAGER
- Turn the function selector to ON (II) and make sure that
the green power indicator lights.
The burner should now ignite and remain in operation
until the set temperature is reached.
If any ignition faults or malfunctions occur, the burner
performs a 'LOCKOUT SHUTDOWN'. This is shown by
the red button light on the burner and by the warning
light on the control panel.
bIf a “LOCKOUT SHUTDOWN” occurs, wait about 30
seconds before resetting the burner.
To reset the burner, press the red button light on the
burner. The complete ignition cycle will be repeated up
to the ignition of the flame.
If you are going to be away for a short period of time like
a weekend or a short holiday, etc., and outdoor tempera-
tures are above ZERO, proceed as follows:
- Turn the function selector to OFF (I) and make sure that
the green power indicator goes out
- Turn the system's main power switch OFF
bDo NOT perform this procedure if outdoor tempera-
tures might fall below ZERO (risk of freezing).
In that case proceed as follows:
- Adjust the boiler thermostat to about the middle of the
section with one line
- Adjust the room thermostat to about 10°C.
20
40
60
80
100
0120
20
40
60
80
100
0120
TEMPORARY SHUTDOWN
20
40
60
80
100
0120
This operation can be repeated 2-3 times at the most, at
intervals of at least one minute. If the problem persists
after that, call r’s Technical Assistance Service.

19
USER - SYSTEM MANAGER
If the boiler is not going to be used for an extended
period of time, perform the following operations:
- Turn the function selector to OFF (I) and make sure that
the green power indicator goes out
- Turn the system’s main power switch OFF
- Close the fuel cock and heating circuit water cock
- Drain the central heating circuit if there is any risk of
freezing.
bContact r’s Technical Assistance Service if you
encounter any problems in completing the above
procedure.
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40
60
80
100
0120
Use a cloth damped in soapy water to clean the boiler's
external casing.
To remove stubborn marks, use a cloth damped in a
50% mix of water and denatured alcohol or a suitable
cleaning product.
Carefully dry the boiler after cleaning.
bThe combustion chamber and flues must be cle-
aned periodically by r’s Technical Assistance
Service or by a qualified heating engineer (see
page 42).
a Do not use abrasive products, petrol or triethylene.
a Never clean the boiler without first disconnecting
it from the mains electricity supply by turning the
main power switch and the function selector OFF.
PREPARING FOR EXTENDED PERIODS OF DISUSE
CLEANING

20 USER - SYSTEM MANAGER
Seller: .............................................................................................................................................
Mr. .......................................................................................................................................................
Address .......................................................................................................................................
tel. .......................................................................................................................................................
Technical Assistance Service: ....................................................................
Mr. .......................................................................................................................................................
Address .......................................................................................................................................
tel. .......................................................................................................................................................
Fuel oil supplier: ............................................................................................................
Mr. .......................................................................................................................................................
Address .......................................................................................................................................
tel. .......................................................................................................................................................
Installer:.......................................................................................................................................
Mr. ......................................................................................................................................................
Address ......................................................................................................................................
tel. ......................................................................................................................................................
Please remember that in compliance with Italian laws, THE
PERSON RESPONSIBLE FOR SYSTEM MANAGEMENT
MUST ENSURE THAT PROFESSIONALLY QUALIFIED
PERSONNEL UNDERTAKE PERIODIC MAINTENANCE
AND COMBUSTION EFFICIENCY MEASUREMENTS.
r’s Technical Assistance Service is qualified to satisfy
these legal requirements and can also provide useful
information on MAINTENANCE PROGRAMMES desig-
ned to guarantee:
- greater safety
- compliance with applicable legislation
- freedom from the risk of fines in the event of spot
checks.
Date Work done
Date Quantity supplied Date Quantity supplied Date Quantity supplied Date Quantity supplied
MAINTENANCE
USEFUL INFORMATION