Riello RTQ 3S Series Owner's manual

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

CONFORMITY
RANGE
2
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 Appliances Directive 2009/142/EC (until 20 April 2018 ) and
Regulation (EU) 2016/426 (from 21 April 2018) and applicable sections of the Electromagnetic
Compatibility Directive 2014/30/UE and Low Voltage Directive 2014/35/UE.
MODEL CODE
RTQ 2700 3S 20106515
RTQ 3000 3S 20106514
RTQ 3500 3S 20107462
RTQ 4000 3S 20107467

3
Dear Customer,
Thank you for choosing a RTQ 3S r, boiler. You have purchased a modern, high
efficiency, quality product that is designed to give dependable and safe service and to
provide 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.

CONTENTS
CONTENTS
4
The following symbols are used in this manual:
b CAUTION! = Indicates actions that require
caution and adequate preparation
aSTOP! = Identifies actions that you MUST NOT do
This manual, Code Doc-0084217 Rev. 4 (04/18) is made
up of 36 pages.
GENERAL 5
Precautions 5
General safety information 5
Product description 6
Control panels 7
Recommended burners 8
Product identification 11
Technical data 12
SYSTEM MANAGER 13
Start up 13
Temporary shutdown 14
Preparing for extended periods of disuse 15
Cleaning 15
Maintenance 16
Useful information 16
INSTALLER 17
Unpacking the product 17
Overall dimensions and weights 18
Handling 18
Installation in older systems
and systems requiring modernisation 19
Place of installation 19
Water connections 20
Anti-condensate pump 21
Combustion gas exhaust 22
Door hinges 22
Changing the direction of door opening 23
Earth connection 25
Fitting the casing panels 26
TECHNICAL ASSISTANCE SERVICE 30
Preparing for initial start-up 30
Initial start-up 31
Checks during and after initial start-up 32
Maintenance 33
Cleaning the boiler 34
Troubleshooting 35

GENERAL SAFETY INFORMATION
PRECAUTIONS
GENERAL 5
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
standards in compliance with the instructions
provided by rin this instruction manual, and that
it conforms to all applicable laws and standards.
b The boiler must only be used for the purpose
specified by rand for which it is designed. The
manufacturer 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,
disconnect it immediately from the mains electricity
supply, shut off the water supply, and notify your
local rTechnical Assistance Centre or a qualified
heating engineer immediately.
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
suspicious smells:
- Ventilate the room by opening all doors and
windows.
- 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
instructions from the boiler’s manufacturer.
aNever pull, disconnect, or twist the electrical
cables coming from the boiler even if it is
disconnected 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.
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 The boiler must be serviced at least once a year.
b This instruction manual is an integral part of the
boiler. It must be kept safe and must ALWAYS
accompany 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
replacement immediately from your local r
Technical Assistance Centre
.

PRODUCT DESCRIPTION
GENERAL
6
RTQ 3S rsteel boilers are high efficiency boilers
with horizontal, flame reversal combustion chambers
and concentrically arranged flue gas pipes. They
are designed 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
establish 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 opened
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.
3
2
1
4 6 985 7
10
11
12
13
14
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

CONTROL PANELS
GENERAL 7
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.
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 1
Solar collector temperature sensor 1
Pipe temperature sensor 1 1
Two-stage burner control kit
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
MODEL TYPE
TECH CLIMA TOP Climate control
TECH CLIMA COMFORT Climate control
TECH CLIMA MIX Climate control
TECH PRIME Electro-mechanical
TECH PRIME ACS Electro-mechanical

RECOMMENDED BURNERS
The burners recommended to obtain the best possible performance from RTQ 3S rboilers are:
BURNER RTQ 3S ACCESSORIES KIT
MODEL CODE 2700 3000 3500 4000 BURNER PLATE
GAS
RS 300/M 20071010 • • 20076596
RS 300/E on demand • • 20076596
RS 300/EV on demand • • 20076596
RS 310/M MZ 20068351 - 20061373 -
20074146 - 20074149 • • 20076596
RS 410/M MZ 20068361 - 20067141 -
20074148 - 20074150 • 20076596
RS 410/M MZ 20068356 • • Standard
RS 410/M BLU 20068270 • Standard
RS 310/EV BLU 20083956 • • 20076596
RS 410/EV BLU 20083957 • 20076596
RS 510/M BLU 20069845 • Standard
GAS 9 P/M t.l. 3754038 • • Standard
GAS 10 P/M t.c. 3754133 • 20067633
GAS 10 P/M t.c. 3754133 • 20078662
GAS 10 P/M t.l. 3754138 • 20067633
GAS 10 P/M t.l. 3754134 • 20078662
MIXED OIL/GAS
GI/EMME 3000 t.c. 3488753 • 20067633
GI/EMME 4500 t.c. 3489057 • 20067633
RLS 300/E MX 3898530 • • 20076596
RLS 300/EV MX on demand • • 20076596
RLS 310/M MX 20087648 - 20087651 • • 20076596
RLS 310/E MX 20082946 - 20087644 • • 20076596
RLS 410/M MX 20087650 - 20076483 • 20076596
RLS 410/E MX 20087646 - 20084376 • 20076596
RLS 500/M MX 3899602 • • 20078662
8GENERAL

BURNER RTQ 3S ACCESSORIES KIT
MODEL CODE 2700 3000 3500 4000 BURNER PLATE
OLI
RL 300/B MZ 3478410 • • 20076596
RL 300/B MZ 3478400 • Standard
RL 400/B MZ 3478512 • 20076596
NAPHTHA
PRESS 300 T/N ECO t.l. 3439022 • • Standard
b The couplings were obtained with the operating point at 3% O2.
b Refer to the instruction manual supplied with the chosen burner for the installation of the burner, the electrical
connections and the necessary adjustments.
b Prolonged heads and burner support plates are necessary for proper installation and for the optimal combination
of the burners.
b In the case of two-stage burners, the flow rate of the 1st stage must not be less than 70% of the total. For liquid-fuel
burners equipped with 2 nozzles, adequately choose the first stage nozzle.
b Remember that in Italy, the Prime Ministerial Decree of 2 October 1995 provides for the use of fuel oil with sulphur
content of less than 0.3% by weight in heating systems with power lower than 3 MW. Refer to the current law in the
country of installation.
9
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
burner, 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
insulation (A) supplied with the boiler.
DIMENSIONS (mm) RTQ 3S
2700 3000 3500 4000
Burner head - L min. (mm) 350 350 405 405
Hole in door - Ø (mm) 350 350 440 440
DIMENSIONS (mm) RTQ 3S
2700 3000 3500 4000
Ø 300 300 350 350
A 260 260 310 310
Threads M18 M18 M20 M20
45°
45°
A
A
Ø
BURNER PLATE
RTQ 3S rboilers have burner plates with holes
arranged to accept the recommended burners. The
following 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.
10 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.
- Serial number plate
This is located on the boiler body and specifies
the serial number, model, and furnace power.
- Data plate
This lists the technical specifications and
performance of the product.
It comes inside the documentation envelope. 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.
The boilers are identified by two plates:
23270000581
WEEK OF
MANUFACTURE
PRODUCT IDENTIFICATION
11
GENERAL

b The stack must guarantee the minimum draught specified by applicable technical standards, assuming zero
pressure at the connection to the flue gas exhaust.
b Values obtained with Rgas burners, calibrated with CO2= 9,7%, λ= 1,2 and with Rfuel oil burners calibrated
with CO2= 12,5%.
DESCRIPTION RTQ 3S
2700 3000 3500 4000
Fuel OIL/GAS
Rated heat input min 2401 2701 3001 3501 kW
max 2700 3000 3500 4000 kW
Rated useful heat output Pn min 2310 2598 2887 3368 kW
max 2576 2862 3339 3816 kW
Useful efficiency at minimum Pn 96,2 96,2 96,2 96,2 %
Useful efficiency at maximum Pn 95,4 95,4 95,4 95,4 %
Useful efficiency at 30% max. Pn 96,7 96,7 96,7 96,7 %
Constant pressure drop < 0,1 %
Flue gas temperature (∆T) 100÷120 °C
Flue gas mass flow rate 1,10 1,26 1,43 1,63 kg/sec
Furnace pressure 8,0 6,5 7,1 8 mbar
Furnace volume 2729,8 3256,9 3743 4235 dm3
Total volume of flue gas side 3648 4464 5140 5847 dm3
Total surface area for heat exchange 69,36 80,11 94,66 108,3 m2
Volumetric heat load 989 921 935 945 kW/m3
Specific heat load 37,1 35,7 35,3 35,2 kW/m2
Maximum operating pressure 6 bar
Maximum admissible temperature 95 °C
Maximum operating temperature 85 °C
Min. admissible water return temp. 55 °C
Pressure drop ∆T 10°C 190 230 240 280 mbar
Pressure drop ∆T 20°C 40 50 55 65 mbar
Water capacity 2700 2750 3650 4075 litri
Turbulators 106 119 130 140 n°
TECHNICAL DATA
12 GENERAL

START UP
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
pressure 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
13
SYSTEM MANAGER

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
burner and wait until the flame ignites.
Repeat this operation 2 -3 times at the most. If the problem
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
temperature 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
SYSTEM MANAGER
14

PREPARING FOR EXTENDED PERIODS OF DISUSE
CLEANING
b The combustion chamber and flue pipes must be
cleaned periodically by the Technical Assistance
Service or by a qualified heating engineer (see
page 34).
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
15
SYSTEM MANAGER

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.
MAINTENANCE
USEFUL INFORMATION
16
Seller: .............................................................................................................................................
Mr. .......................................................................................................................................................
Address .......................................................................................................................................
Tel. ......................................................................................................................................................
Technical Assistance Service: ....................................................................
Mr. .......................................................................................................................................................
Address .......................................................................................................................................
Tel. ......................................................................................................................................................
Fuel oil supplier: ............................................................................................................
Mr. .......................................................................................................................................................
Address .......................................................................................................................................
Tel. ......................................................................................................................................................
Installer:.......................................................................................................................................
Mr. ......................................................................................................................................................
Address ......................................................................................................................................
Tel. .....................................................................................................................................................
Date Work done
Date Quantity supplied Date Quantity supplied Date Quantity supplied Date Quantity supplied
SYSTEM MANAGER

UNPACKING THE PRODUCT
A
RTQ 3S rsteel boilers come in 3 separate 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
completion 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 2700-3000
3S and 3 packs for models RTQ 3500-4000 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.
INSTALLER 17

C
A
A1
B
B1 E
D
70
70
161
DESCRIPTION RTQ 3S
2700 3000 3500 4000
A -Width 1865 1935 2040 2070 mm
A1 -Base width 1815 1885 1990 2020 mm
B -Depth 3490 3600 3934 4184 mm
B1 -Base depth 2940 3040 3310 3560 mm
C -Height 1995 2055 2140 2170 mm
D -Burner and flue height 1050 1080 1155 1170 mm
E -Door depth 310 320 325 325 mm
Weight of boiler 4676 5190 6015 6600 kg
Weight of casing 150 156 180 190 kg
OVERALL DIMENSIONS AND WEIGHTS
HANDLING
RTQ 3S rsteel boilers are fitted with lifting
attachments. Take great care when moving them and
only use lifting equipment of adequate capacity.
Remove the fixing screws and remove the wooden pallet
before positioning the boiler.
b Wear suitable personal protective equipment and
use suitable safety devices.
INSTALLER
18

PLACE OF INSTALLATION
INSTALLATION IN OLDER SYSTEMS AND SYSTEMS REQUIRING MODERNISATION
RTQ 3S r steel boilers must be installed in a
dedicated boiler room, with adequately sized vents, in
compliance with applicable laws and standards.
If at all possible, the boiler should be installed on a raised
base to prevent the burner fan sucking up dust.
b When installing the boiler, allow sufficient space
around it to access all safety and control devices
and to permit easy maintenance.
b If the specific weight of the gas supply to the burner
is greater than the specific weight of air, install all
electrical parts at least 500 mm above floor level.
aDo 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.
When installing these boilers in old systems or systems
requiring modernisation, always perform the following
checks:
- Make sure that the stack is able to withstand the
temperature of the combustion gases and that it
has been designed and made in compliance with
applicable standards. The stack must also be as
straight as possible, sealed, insulated and not blocked
or choked.
- Make sure that the electrical system has been installed
by a qualified electrician in compliance with applicable
standards.
- Make sure that the oil feed line and any oil storage tank
are made and installed in compliance with applicable
standards.
- Make sure that the expansion vessels are big enough
to contain the volume generated by thermal expansion.
- Make sure that flow rate, head and direction of flow of
the pumps are suitable and correct.
- Make sure that the circuit has been flushed out to
remove all sludge and lime scale, and has been vented
and seal tested.
- Make sure that a suitable water treatment system is
installed if the quality of the supply/recirculation water
so demands. (See page.21).
INSTALLER 19

RTQ 3S rboilers are designed and made for use
in central heating installations, but can also be used for
domestic hot water production if connected to a suitable
storage cylinder. Water fittings are as specified in the
following table.
b Allow for the dimensions of the control panel that
needs to be installed on top of the boiler.
WATER CONNECTIONS
AB70
1 4
3
C
2
5 6
D
F
E
G
DESCRIPTION RTQ 3S
2700 3000 3500 4000
1 - Central heating flow (*) DN175 DN175 DN200 DN200 Ø
2 - Instrument bulb / sensor socket G1/2" G1/2" G1/2" G1/2" Ø
3 - Safety device fitting DN100 DN100 DN125 DN125 Ø
4 System return (*) DN175 DN175 DN200 DN200 Ø
5 Condensate drain G1"1/4 G1"1/4 G1"1/4 G1"1/4 Ø
6 Boiler drain G1"1/2 G1"1/2 G1"1/2 G1"1/2 Ø
A 2115 2215 2410 2660 mm
B 610 610 690 690 mm
C 95 107 100 100 mm
D 500 500 550 550 mm
E 129 137 150 150 mm
F 132 125 160 160 mm
G 140 140 160 170 mm
(*) All flanged connections are PN6 according to EN 1092-1.
INSTALLER
20