Riello RTQ 91 3S User manual

1
INSTALLATION, OPERATION, MAINTENANCE
AND SYSTEM MANAGEMENT MANUAL
STEEL BOILERS
RTQ 3S

2
RANGE
CONFORMITY
RTQ 3S rboilers conform to the Efficiency Directive 92/42/CEE .
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 2014/30/UE and Low Voltage Directive 2014/35/UE.
When RTQ 3S boilers up to 400 kW are used in conjunction with a fuel oil burner,
they conform to the Energy-Related Products Directive 2009/125/EC
and to the EU Delegated Regulation 813/2013
MODEL CODE
RTQ 91 3S 20024200
RTQ 115 3S 4032606.0
RTQ 166 3S 4032607.0
RTQ 217 3S 4032608.0
RTQ 255 3S 4032609.0
RTQ 318 3S 4032610.0
RTQ 349 3S 4032611.0
RTQ 448 3S 4032613.0
RTQ 511 3S 4032614.0
RTQ 575 3S 4032615.0
RTQ 639 3S 4032616.0
RTQ 766 3S 4032617.0
RTQ 896 3S 20008436
RTQ 1100 3S 20012427
RTQ 1300 3S 20008435
RTQ 1600 3S 20016656
RTQ 2100 3S 20016657
RTQ 2400 3S 20018817
MODEL CODE
RTQ 166 3S COMPONIBILE 20040755
RTQ 217 3S COMPONIBILE 4032620.0
RTQ 255 3S COMPONIBILE 4032621.0
RTQ 318 3S COMPONIBILE 4032622.0
RTQ 349 3S COMPONIBILE 4032623.0
RTQ 448 3S COMPONIBILE 4032625.0
RTQ 511 3S COMPONIBILE 4032626.0
RTQ 575 3S COMPONIBILE 4032627.0
RTQ 639 3S COMPONIBILE 4032628.0
RTQ 766 3S COMPONIBILE 20042810
RTQ 896 3S COMPONIBILE 20042814

3
Dear Customer,
Thank you for choosing a RTQ 3S r, boiler. You have purchased a modern, high effi-
ciency, quality product that is designed to give dependable and safe service and to pro-
vide comfort in the home for many years to come. Arrange for your 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 RTQ 3S
r boiler.
Please accept our renewed thanks for your purchase.
Riello S.p.A.

4
CONTENTS
This manual, Code 20020615 Rev. 27 (09/16) is made up
of 44 pages.
The following symbols are used in this manual:
b CAUTION! = Indicates actions that require cau-
tion and adequate preparation
aSTOP! = Identifies actions that you MUST NOT do
CONTENTS
GENERAL 5
General safety information 5
Precautions 5
Product description 6
Control panels 8
Recommended fuel oil burners 9
Recommended gas burners 10
Product identification 12
Technical data for boilers with fuel oil burners <400 kw 13
Technical data for boilers with gas burners <400 kw 14
Technical data for boilers > 400 kw 15
SYSTEM MANAGER 16
Start up 16
Temporary shutdown 17
Preparing for extended periods of disuse 18
Cleaning 18
Maintenance 19
Useful information 19
HEATING ENGINEER 20
Unpacking the product 20
Overall dimensions and weights 21
Handling 22
Place of installation 23
Installation in older systems and systems requiring
modernisation 24
Water connections 24
Anti-condensate pump 28
Combustion gas exhaust 28
Door hinges 29
Changing the direction of door opening 29
Earth connection 31
Fitting the casing panels 32
TECHNICAL ASSISTANCE SERVICE 36
Preparing for initial start-up 36
Initial start-up 37
Checks during and after initial start-up 38
Maintenance 39
- Opening the door 39
- adjusting the door 39
Cleaning the boiler 40
Troubleshooting 41

5
GENERAL
b The boiler is delivered in separate crates. Check
that it is complete, undamaged and as ordered as
soon as you receive it. Report any discrepancies or
damage to the dealer who sold it.
b The RTQ 3S r boiler must be installed by a
legally qualified heating engineer. 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 stan-
dards in compliance with the instructions provided
by rin this instruction manual, and that it con-
forms to all applicable laws and standards.
b The boiler must only be used for the purpose spe-
cified by rand for which it is designed. The
manufacturer declines all responsibility, contractual
or other, for damage to property or injury to per-
sons or animals caused by improper installation,
adjustment, maintenance or use.
b If you notice any water leaking from the boiler,
disconnect it immediately from the mains electricity
supply, shut off the water supply, and notify your
local rTechnical Assistance Centre or a quali-
fied heating engineer immediately.
b Periodically check that operating pressure in the
water 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 or a
professionally qualified heating engineer.
b If the boiler is not going to be used for an extended
period of time, contact r’s Technical Assistance
Service or a qualified heating engineer to have it
prepared for shut-down as follows:
- Switch the boiler OFF at the control panel and at the
mains power switch
- Close the fuel cock and heating circuit water cock
- Drain the central heating circuit if there is any risk of
freezing.
b Drain the central heating circuit if there is any risk of
freezing
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 repla-
cement immediately from your local rTechnical
Assistance Centre.
aDo not allow children or infirm persons to operate
this RTQ 3S r boiler 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 suspi-
cious 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
heating engineer.
aDo not touch the boiler while barefoot or wet.
aNever clean or service the boiler without first
disconnecting it from the mains electricity supply
by turning the main power switch and the control
panel switch OFF.
aDo not tamper with or adjust the safety or control
devices without prior authorisation and instruc-
tions from the boiler’s manufacturer.
aNever pull, disconnect, or twist the electrical
cables coming from the boiler even if it is discon-
nected from the mains electricity supply.
aDo not obstruct or restrict the vents in the room
where the boiler is installed. Adequate ventilation
is essential for correct combustion.
aDo 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
automatic anti-frost systems to do so.
aDo not switch the boiler off if outdoor temperature
drops below ZERO (risk of freezing).
aDo not store containers of flammable substances
in the room where the boiler is installed.
aDo not dispose of packaging material into the
environment, 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 safety
precautions be respected.
General safety information GENERAL SAFETY INFORMATION
Precautions PRECAUTIONS
GENERAL

6
GENERAL
RTQ 3S rsteel boilers are high efficiency boilers
with horizontal, flame reversal combustion chambers and
concentrically arranged flue gas pipes. They are desig-
ned for central heating and, when used in conjunction
with a suitable storage cylinder, for domestic hot water
production too.
Because they operate at low pressure, they provide a
gradual heating action without thermal shock.
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 are used to ensure a long
working life.
Stainless steel turbulators inside the flue gas pipes esta-
blish an ideal pressure inside the combustion chamber
and an ideal flue gas temperature. Evenly distributed
thermal load optimises the efficiency of the boiler-burner
system.
The boiler body is thoroughly insulated with a layer of
high density glass wool.
The boiler’s front door and the flue gas box can be ope-
ned completely to facilitate the inspection, maintenance
and cleaning of internal parts and to speed up servicing
in general.
The front door can open in either direction, even without
removing the burner.
Max. permissible return temperature with a gas burner:
50-55°C.
Max. permissible return temperature with a fuel oil burner:
37°C.
3
2
1
4 5
14
7
10
11
12
13
8
6
9
RTQ 91 3S
1 - Burner
2 - Flame inspection window
3 - Door
4 - Casing
5 - Flue gas pipes
6 - Instrument bulb/sensor sockets
7 - Central heating flow
8 - Turbulators
9 - Combustion chamber
10 - Flue gas exhaust
11 - Flue gas box
12 - Inspection window
13 - Condensate drain
14 - Central heating return
MODELS UP TO 400 KW USED WITH FUEL OIL BURNERS CONFORM TO THE ENERGY-RELATED PRODUCTS
DIRECTIVE 2009/125/EC AND TO THE EU DELEGATED REGULATION 813/2013
Product description
PRODUCT DESCRIPTION

7
GENERAL
0
30
60
90
3
2
1
12
46785
13
14
10
9
11
15
1 - Burner
2 - Flame inspection window with pressure
measurement / cooling valve
3 - Door
4 - Casing
5 - Central heating return
6 - Safety device fitting
7 - Instrument bulb/sensor sockets
8 - Central heating flow
9 - Flue gas pipes
10 - Turbulators
11 - Combustion chamber
12 - Flue gas exhaust
13 - Flue gas box
14 - Inspection window
15 - Condensate drain
RTQ 115 - 2400 3S

8
GENERAL
The r control panels that can be used with r RTQ 3S steel boilers are listed below. These control panels cater
for all the needs of the heating system and of all the devices installed in it.
Respect the indications of the table rigorously to ensure trouble-free operation and maximum reliability of your boiler
over time.
b When a TECH CLIMA TOP or CLIMA COMFORT control panel is installed, the boiler return (cold) line must be
equipped with a temperature sensor socket.
See the catalogue for the necessary accessory part numbers.
Single stage Two stage Modulating Cascaded Wood fuelled Solar DHW Direct CH circuit Mixed CH zone 1 Mixed CH zone 2
1 2
M
°C
1 2
M
°C
1 2
M
°C
1 2
M
°C
1 2
M
°C
1 2
M
°C
1 2
M
°C
1 2
M
°C
1 2
M
°C
1 2
M
°C
CLIMA TOP
STANDARD    
Control by control panel with assistance of
accessories listed below
     
ACCESSORIES
Immersion temperature sensor 1 1 1 1
Solar collector temperature sensor 1
Pipe temperature sensor 1 1
CLIMA COMFORT
STANDARD  
Control by control panel with assistance of
accessories listed below
     
ACCESSORIES
Immersion temperature sensor 1 1 1
Solar collector temperature sensor 1
Pipe temperature sensor 1 1
Two-stage burner control kit 1
1 mixed zone kit 1
CLIMA MIX
STANDARD 
Control by control panel with assistance of
accessories listed below

ACCESSORIES
Pipe temperature sensor 1 1
1 mixed zone kit 1
PRIME
STANDARD  
Control by control panel with assistance of
accessories listed below

ACCESSORIES
Two stage burner kit 1
PRIME ACS
STANDARD   
Control by control panel with assistance of
accessories listed below

ACCESSORIES
Two stage burner kit 1
Total shutdown kit 1 1
CONTROL PANELS MINIMUM CH FLOW TEMPERATURE
MODELL TYPE T° > 50°C T° > 40°C
TECH CLIMA TOP Climate control •
TECH CLIMA COMFORT Climate control •
TECH CLIMA MIX Climate control •
TECH PRIME Electro-mechanical •
TECH PRIME ACS Electro-mechanical •
Control panels
CONTROL PANELS

9
GENERAL
The burners recommended to obtain the best possible performance from RTQ 3S rboilers are:
BURNER RTQ 3S ACCESSORIES KIT
MODEL CODE 91 115 166 217 255 318 349 448 511 575 639 766 896
1100 1300 1600 2100 2400
BURNER
PLATE
LONG
HEAD
OIL
SINGLE STAGE
RG 3 3739300 • 3000965
RG 4 S 3739650 • 3000966
RG 5 S 3739950 • • 4031391 3001068
RL 34/1 MZ
t.l. 3470111 • •
TWO STAGE
RG 3D 3739450 •
(R)
•
(R)
RG 4D 3739750 •
(R) 3000969
RG 5D 3739850 •
(R) 4031391 3000981
RL 34 MZ t.l. 3470211 •
(R)
•
(R) 3010426
RL 44 MZ t.l. 3470311 •
RL 44 MZ t.l. 3470341 •
(R)
RL 50 t.l. 3474633 • •
RL 50 t.l. 3474633 • 4031395
RL 70 t.l. 3475033 • •
RL 100 t.l. 3475233 • • •
RL 130 t.l. 3475433 • •
RL 190 t.c. 3475613 • 3010444
RL 250 t.c. 3470010 • 3010422
RL 300/B MZ 3478410 •
MECHANICAL CAM
MODULATION
RL 28/M t.l. 3471003 • 4031198
RL 28/M t.l. 3471003 • •
RL 38/M t.l. 3471403 • •
(R) Reference burner used during performance qualification tests to derive the technical data declared.
b To assemble/disassemble the burners equipped with recirculation tube, it might be necessary to remove the latter
before carrying out such operations (strictly comply with the use and maintenance manual of the burner).
Recommended fuel oil burners RECOMMENDED FUEL OIL BURNERS

10
GENERAL
BURNER RTQ 3S ACCESSORIES KIT
MODEL CODE 448 511 575 639 766 896 1100 1300 1600 2100 2400 BURNER
PLATE
LONG
HEAD
GAS
TWO STAGE
RS 50 t.l. 3784703 • •
RS 70 t.l. 3785103 • •
RS 100 t.l. 3785303 • • •
RS 130 t.l. 3785503 • •
MODULATING
RS 50/M MZ t.l. 3781622 • •
RS 70/M t.l. 3789611 • •
RS 100/M t.l. 3789711 • • • •
RS 130/M t.l. 3789811 • •
RS 190/M t.c. 3787623 • 3010443
RS 250/M MZ t.c. 3788411 •
GAS 9 P/M t.l. 3754038 •
b See the instruction manual provided with the burner for further information on:
- Burner installation
- Electrical connections
- Burner adjustments.
b 1 - Long heads and burner plates are required for the correct installation and coupling of the burners.
2 - If a two stage burner is installed, 1st stage heat input must not be less than 70% of total heat input. With
liquid fuel burners equipped with 2 nozzles, it is therefore important to choose the correct first stage nozzle.
b To assemble/disassemble the burners equipped with recirculation tube, it might be necessary to remove the latter
before carrying out such operations (strictly comply with the use and maintenance manual of the burner).
Recommended gas burners
RECOMMENDED GAS BURNERS

11
GENERAL
A
Ø
L
b Blast tubes must not exceed the specified lengths by more than 20%.
aDo not re-use old burners if their blast tube lengths are below those specified in the table.
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 burner’s
blast tube are as specified in the following table
b When you finish installing the burner in the boiler,
fill the gap between the burner’s blast tube and the
refractory material in the door with the ceramic insu-
lation (A) supplied with the boiler.
45°
45°
A
A
Ø
BURNER PLATE
RTQ 3S rboilers have burner plates with holes
arranged to accept the recommended burners. The fol-
lowing table shows the dimensions of the holes.
L < S
S
L
IMPORTANT NOTES FOR BURNER
INSTALLATION
Before fixing the burner to the boiler, make sure that:
- The door opens the right way (see the relevant sections
for details on how to reverse the door).
- The length (L) of the burner fixing bolts is less than
(S), i.e. the total depth of the seal, plates and washer.
Longer bolts can cause the door to warp, compro-
mising its ability to seal the boiler hermetically and
permitting the release of combustion fumes.
To ensure correct burner installation, also refer to the
burner’s own manual.
DIMENSIONS
(mm)
RTQ 3S
91 115 166 217 255 318 349 448 511 575 639 766 896 1100 1300 1600 2100 2400
L min. 170 170 170 215 215 240 240 260 260 275 275 280 325 340 365 375 375 375
Ø hole in door 140 140 160 180 180 180 180 185 185 205 205 205 260 280 300 350 350 350
DIMENSIONS
(mm)
RTQ 3S
91 115 166 217 255 318 349 448 511 575 639 766 896 1100 1300 1600 2100 2400
Ø 140 130 140 165 165 165 165 165 165 185 185 185 185 205 205 265 230 300
A 120 120 131
158,5 158,5 158,5 158,5 158,5 158,5 195 195 195 195 195 195 260 255 260
Threads M8 M8 M8 M8 M8 M8 M8 M8 M8
M12 M12 M12 M12 M12 M12 M16 M16 M18

12
GENERAL
b If these plates or any other means of clearly identifying the product are defaced, removed or lost, proper installation
and servicing may be rendered difficult.
The boilers are identified by two plates:
- Serial number plate
This is located on the boiler body and spe-
cifies the serial number, model, and furnace
power.
- Data plate
This lists the technical specifications and
performance of the product.
It comes inside the documentation enve-
lope. On completion of the installation you
MUST apply it in a clearly visible position at
the top of one of the side panels.
If you damage or lose this label, order
a replacement immediately from r’s
Technical Assistance Service.
b One or more data labels may be supplied
in the document envelope. Identify the cor-
rect label for the type of fuel.
Matricola
Fabrication
Modello
Modéle
Pres. Max esercizio
Pres. Max de serv.
Portata term.
Débit therm. Qmax (Hi)
PMS
COMBUSTIBILE UTILIZZATO / COMBUSTIBLE UTILIZE: GAS, GASOLIO / GAZ, FIOUL
CALDAIA IN ACCIAIO
CHAUDIERE EN ACIER
Modello
Modèle Matricola
Fabrication
Codice
Code
Codice
Code PIN
Anno fabbricazione
Année fabrication
Tipo
Type
Portata term.
Débit therm.
Pot. utile
Puiss. utile
Pres. Max esercizio
Pres. Max de serv.
Aliment. elettrica
Aliment. eléctrique
kW
bar
T°Max ammessa
T°Max admise
Contenuto acqua
Capacité en eau
°C
l
066940IF
Combustible utilisé : TOUS GAZ / FIOUL
Combustibile utilizzato: TUTTI I GAS / GASOLIO
max (Hi)
Qmax 60°/80°
P
PMS
Pressione focolare
Pression foyer
kW
pn
Collegamento di terra obbligatorio - Raccordement à la terre obligatoire
PER CATEGORIA COMBUSTIBILE
E PAESI DI DESTINAZIONE VEDI ETICHETTA BRUCIATORE
POUR CATEGORIE COMBUSTIBLE
ET PAYS DE DESTINATION VOIR ETIQUETTE BRULEUR
Portata term.
Débit therm. min (Hi)
QkW Pot. utile
Puiss. utile kW
min 60°/80°
P
Tmax
Surface d'échange m²
Superficie di scambio
mbar
 
bar
kW
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
/
/
//
Matricola
Fabrication
Modello
Modéle
Pres. Max esercizio
Pres. Max de serv.
Portata term.
Débit therm. Qmax (Hi)
PMS
COMBUSTIBILE UTILIZZATO / COMBUSTIBLE UTILIZE: GAS, GASOLIO / GAZ, FIOUL
CALDAIA IN ACCIAIO
CHAUDIERE EN ACIER
Modello
Modèle Matricola
Fabrication
Codice
Code
Codice
Code PIN
Anno fabbricazione
Année fabrication
Tipo
Type
Portata term.
Débit therm.
Pot. utile
Puiss. utile
Pres. Max esercizio
Pres. Max de serv.
Aliment. elettrica
Aliment. eléctrique
kW
bar
T°Max ammessa
T°Max admise
Contenuto acqua
Capacité en eau
°C
l
066940IF
Combustible utilisé : TOUS GAZ / FIOUL
Combustibile utilizzato: TUTTI I GAS / GASOLIO
max (Hi)
Qmax 60°/80°
P
PMS
Pressione focolare
Pression foyer
kW
pn
Collegamento di terra obbligatorio - Raccordement à la terre obligatoire
PER CATEGORIA COMBUSTIBILE
E PAESI DI DESTINAZIONE VEDI ETICHETTA BRUCIATORE
POUR CATEGORIE COMBUSTIBLE
ET PAYS DE DESTINATION VOIR ETIQUETTE BRULEUR
Portata term.
Débit therm. min (Hi)
QkW Pot. utile
Puiss. utile kW
min 60°/80°
P
Tmax
Surface d'échange m²
Superficie di scambio
mbar
 
bar
kW
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
/ /
//
23270000581
WEEK OF
MANUFACTURE
FUEL
Product identication
PRODUCT IDENTIFICATION

13
GENERAL
b The stack must guarantee the minimum draught specified by applicable technical standards, assuming zero pres-
sure at the connection to the flue gas exhaust.
b Values obtained in combination with the reference burners (R) indicated in the combination table.
b When used in conjunction with fuel oil burners, RTQ 3S boilers <400kW conform to:
- Energy-Related Products Directive 2009/125/EC
- EU Delegated Regulation 813/2013
DESCRIPTION RTQ 3S
91 115 166 217 255 318 349
Device type Central Heating
B23
Fuel
OIL
Device category See burner
Maximum rated heat input HCV (LCV)
95,4
(90)
122
(115)
176,0
(166)
230,1
(217)
270,4
(255)
337,2
(318)
369,0
(348) kW
Minimum rated heat input HCV (LCV)
74,2
(70)
95,4
(90)
122
(115)
176,0
(166)
230,1
(217)
270,4
(255)
337,2
(318) kW
Maximum useful output (80°/60° C) P4 84,8 110,2 158,7 206,8 243,0 303,4 332,0 kW
Minimum useful output (80°/60° C) (Pn min) 66,9 86,6 110,4 159,2 208,8 244,3 304,0 kW
30% heat output with return at 37°C (P1) 25,7 33,1 47,6 62,0 72,9 91,0 99,9 kW
Seasonal energy efficiency hs 89,0 89,0 89,0 89,0 90,0 90,0 90,0 %
Efficiency at rated heat input in high tempe-
rature mode h4 (80-60°C) HCV (LCV)
88,8
(94,2)
90,3
(95,8)
90,2
(95,6)
89,9
(95,3)
89,9
(95,3)
90,0
(95,4)
90,0
(95,4) %
Useful efficiency at min Pn (80-60°C) HCV
(LCV)
90,1
(95,6)
90,7
(96,2)
90,5
(96,0)
90,4
(95,9)
90,7
(96,2)
90,3
(95,8)
90,1
(95,6) %
Efficiency at rated heat input in low tem-
perature mode h1 with return at 37°C HCV
(LCV)
94,0
(99,7)
94,0
(99,7)
94,0
(99,7)
94,0
(99,7)
94,0
(99,7)
94,1
(99,8)
94,1
(99,8) %
Constant pressure drop 260 330 400 480 550 620 680 W
Flue gas temperature (∆T) 93 95 ÷ 108 °C
Flue gas mass flow rate 0,040 0,050 0,072 0,094 0,111 0,139 0,151 kg/sec
Furnace pressure 2,0 1,5 1,3 2,2 2,8 3,2 3,9 mbar
Furnace volume 97,4 91,0 138,4 199,1 199,1 298,9 298,9 dm3
Total volume of flue gas side 139,7 163,2 234,3 317,2 325,6 457,9 457,9 dm3
Total surface area for heat exchange 3,62 4,35 6,68 8,59 9,47 12,34 12,34 m2
Volumetric heat load 928 1264 1199 1090 1281 1064 1164 kW/m3
Specific heat load 24,1 25,2 23,8 24,1 25,7 24,6 26,9 kW/m2
Maximum operating pressure 6 bar
Maximum admissible temperature 110 °C
Maximum operating temperature 95 °C
Min. admissible water return temp. 37 °C
Pressure drop ∆T 10°C 42,0 15,1 42,0 76,5 144,0 148,0 162,0 mbar
Pressure drop ∆T 20°C 14,0 3,0 11,2 17,2 45,0 27,2 29,7 mbar
Water capacity 126 161 191 268 258 308 308 litri
Turbulators 22 22 30 34 39 44 44 n°
Consumption at full load (Elmax) 460 460 460 530 660 660 760 W
Consumption at part load (Elmin) 138 138 138 159 198 198 228 W
Electrical consumption in standby mode
(Psb)
20 20 20 20 20 20 20 W
Technical data for boilers with fuel oil burners <400 kw
TECHNICAL DATA FOR BOILERS WITH FUEL OIL BURNERS <400 KW

14
GENERAL
DESCRIPTION RTQ 3S
91(*) 115(*) 166(*) 217(*) 255(*) 318(*) 349(*)
Fuel GAS
Rated heat input min
70 90 115 166 217 255 318 kW
max 90 115 166 217 255 318 348 kW
Rated useful heat output Pn min
66,9 86,6 110,4 159,2 208,8 244,3 304,0 kW
max 84,8 110,2 158,7 206,8 243,0 303,4 332,0 kW
Useful efficiency at minimum Pn 95,6 96,2 96,0 95,9 96,2 95,8 95,6 %
Useful efficiency at maximum Pn 94,2 95,8 95,6 95,3 95,3 95,4 95,4 %
Useful efficiency at 30% max. Pn 95,9 95,1 95,6 96,3 96,5 96,5 96,7 %
Constant pressure drop < 1,5 < 1,4 < 1,2
Flue gas temperature (∆T) 93 95 ÷ 108 °C
Flue gas mass flow rate 0,040 0,050 0,072 0,094 0,111 0,139 0,151 kg/sec
Furnace pressure 2,0 1,5 1,3 2,2 2,8 3,2 3,9 mbar
Furnace volume 97,4 91,0 138,4 199,1 199,1 298,9 298,9 dm3
Total volume of flue gas side 139,7 163,2 234,3 317,2 325,6 457,9 457,9 dm3
Total surface area for heat exchange 3,62 4,35 6,68 8,59 9,47 12,34 12,34 m2
Volumetric heat load 928 1264 1199 1090 1281 1064 1164 kW/m3
Specific heat load 24,1 25,2 23,8 24,1 25,7 24,6 26,9 kW/m2
Maximum operating pressure 6 bar
Maximum admissible temperature 110 °C
Maximum operating temperature 95 °C
Min. admissible water return temp. 50 55 °C
Pressure drop ∆T 10°C 42,0 15,1 42 76,5 144 148 162 mbar
Pressure drop ∆T 20°C 14,0 3 11,2 17,2 45 27,2 29,7 mbar
Water capacity 126 161 191 268 258 308 308 litri
Turbulators 22 22 30 34 39 44 44 n°
(*) Heating appliance marketed before 1 January 2018, intended exclusively for replacement under the terms of EU
Regulation 813/2013, article 1, section 2, letter (g).
Technical data for boilers with gas burners <400 kw
TECHNICAL DATA FOR BOILERS WITH GAS BURNERS <400 KW

15
GENERAL
b The stack must guarantee the minimum draught specified by applicable technical standards, assuming zero pres-
sure at the connection to the flue gas exhaust.
b Values obtained with rModels RL and GULLIVER RG with CO2= 12,5%; RS with CO2= 9,7%.
DESCRIPTION RTQ 3S
448 511 575 639 766 896 1100 1300 1600 2100 2400
Fuel GAS / OIL
Rated heat input min
384 448 511 575 639 766 896 1020 1300 1600 2100 kW
max 448 511 575 639 766 896 1100 1300 1600 2100 2400 kW
Rated useful heat output
Pn
min
369,4 431,0 491,6 553,2 614,7 736,9 862,0 981,2 1250,6 1539,2 2020,2 kW
max 427,4 487,5 548,6 609,6 730,8 854,8 1049,4 1240,2 1526,4 2003,4 2289,6 kW
Useful efficiency at minimum Pn 96,2 96,2 96,2 96,2 96,2 96,2 96,2 96,2 96,2 96,2 96,2 %
Useful efficiency at maximum Pn 95,4 95,4 95,4 95,4 95,4 95,4 95,4 95,4 95,4 95,4 95,4 %
Useful efficiency at 30% max. Pn 96,7 96,7 96,7 96,7 96,7 96,7 96,7 96,7 96,7 96,7 96,7 %
Constant pressure drop < 1,2 < 1 %
Flue gas temperature (∆T) 95 ÷ 108 °C
Flue gas mass flow rate 0,206 0,222 0,250 0,277 0,332 0,392 0,477 0,553 0,704 0,911 1,050 kg/sec
Furnace pressure 3,5 4,2 3,4 4,5 5,3 6,0 3,3 5,3 4,7 5,1 7,6 mbar
Furnace volume 410,5 410,5 548,0 548,0 695,0 912,1 1097,8 1479,7 1569,7 2066,2 2066,2 dm3
Total volume of flue gas side 676,8 676,8 888,3 888,3 1101,4 1388,9 1727,9 2162,7 2531,6 3243,5 3243,5 dm3
Total surface area for heat exchange 19,04 19,04 23,52 23,52 28,06 32,87 37,28 42,24 51,37 67,94 67,94 m2
Volumetric heat load 1091 1245 1049 1166 1102 982 1002 879 1020 1016 1162 kW/m3
Specific heat load 22,5 25,6 23,3 25,9 26,0 26,0 28,1 29,4 29,7 29,5 33,7 kW/m2
Maximum operating pressure 6 bar
Maximum admissible temperature 110 °C
Maximum operating temperature 95 °C
Min. admissible water return temp. 55 °C
Pressure drop ∆T 10°C 258,6 295,0 48,6 54,0 48,0 76,5 132,0 230,0 130,0 111,0 142,0 mbar
Pressure drop ∆T 20°C 64,7 73,8 8,1 9,0 11,7 15,3 30,5 60,0 30,5 30,0 35,0 mbar
Water capacity 593 593 758 758 839 1080 1350 1480 1716 2000 2000 litri
Turbulators 60 60 66 66 74 76 70 75 93 114 114 n°
Technical data for boilers > 400 kw TECHNICAL DATA FOR BOILERS > 400 KW

16
HEATING ENGINEER
Have r’s Technical Assistance Service start up your RTQ 3S boiler 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 service 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 water circuit is over 1 bar but below the
maximum limit specified for the boiler
- If the system is equipped with a temperature controller
or timer thermostat, make sure that it is switched on
- Adjust the timer thermostat/s or temperature controller
to the desired temperature (~20°C)
- Turn the system’s main power switch ON
- Turn the control panel power switch ON and make sure
that the green power indicator lights.
- Make the settings as instructed in the instruction
manual for your control panel.
ON
OFF
Start up
START UP
SYSTEM MANAGER

17
HEATING ENGINEER
The burner should now ignite and remain in operation
until the set temperature is reached.
The burner will then switch off and on automatically to
maintain the set temperature without further operator
action.
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.
b If a “LOCKOUT SHUTDOWN” occurs, wait about 30
seconds before resetting the burner.
To reset the burner, press the red button light on the bur-
ner and wait until the flame ignites.
Repeat this operation 2 -3 times at the most. If the pro-
blem persists after that, call r’s Technical Assistance
Service.
If you need to shut down the system for a short period,
proceed as follows.
-Turn the control panel power switch OFF and make
sure that the green power indicator goes out
- Turn the mains power switch OFF
b Do NOT perform this procedure if outdoor tempera-
ture falls below ZERO (risk of freezing).
THEN PROCEED AS FOLLOWS:
- Make the settings as instructed in the instruction
manual for your control panel.
-Make sure that the temperature controller or timer /
room thermostat is set to “frost protection” mode.
ON
OFF
Temporary shutdown TEMPORARY SHUTDOWN

18
HEATING ENGINEER
b The combustion chamber and flue pipes must be
cleaned periodically by the Technical Assistance
Service or by a qualified heating engineer (see
page 40).
If the boiler is not going to be used for an extended
period of time, perform the following operations:
- Turn the control panel power switch OFF and make
sure that the green power indicator goes out
- Turn the mains 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 Contact rTechnical Assistance Service if you
encounter any problems in completing the above
procedure.
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.
aDo not use abrasive cleaning pads or powder deter-
gents.
aNever clean the boiler without first disconnecting it
from the mains electricity supply by turning the main
power switch and the control panel switch OFF.
ON
OFF
Preparing for extended periods of disuse
PREPARING FOR EXTENDED PERIODS OF DISUSE
Cleaning
CLEANING

19
HEATING ENGINEER
Seller: .............................................................................................................................................
Mr. .......................................................................................................................................................
Address .......................................................................................................................................
Tel. ......................................................................................................................................................
Technical Assistance Service: ....................................................................
Mr. .......................................................................................................................................................
Address .......................................................................................................................................
Tel. ......................................................................................................................................................
Fuel oil supplier: ............................................................................................................
Mr. .......................................................................................................................................................
Address .......................................................................................................................................
Tel. ......................................................................................................................................................
Installer:.......................................................................................................................................
Mr. ......................................................................................................................................................
Address ......................................................................................................................................
Tel. .....................................................................................................................................................
Please remember that THE PERSON RESPONSIBLE
FOR SYSTEM MANAGEMENT MUST ENSURE THAT
PROFESSIONALLY QUALIFIED HEATING ENGINEERS
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
designed 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 MAINTENANCE
Useful information USEFUL INFORMATION

20
HEATING ENGINEER
A
RTQ 3S rsteel boilers come in 3separate crates:
1) BOILER BODY CRATE to which is attached the
documentation envelope (A) containing:
- Instruction manual
- Data label (to be applied to the casing on comple-
tion of the installation)
- Water test certificate
- Bar code labels
- Spare parts catalogue
b The instruction manual is an integral part of the
boiler. Once located, read it thoroughly and keep it
safe.
2) THE CASING PANELS complete with assembly
accessories (2 packs for models RTQ 448÷1600 3S
and 3 packs for models RTQ 2100÷2400 3S).
3) THE FRONT COVER to fit on top of the front door.
IMPORTANT
For the boiler to function correctly, it must be connected
to a r TECH control panel and dedicated control
accessories.
Unpacking the product
UNPACKING THE PRODUCT
HEATING ENGINEER