Installation Manual for Calorio Gas Heaters

Calorio Serie
Balanced flues gas heaters
Natural gas / LPG fired
Installation, use and
maintenance manual

Edition: 03/2009
Code: D-LBR553
This manual has been drawn up and printed by Robur S.p.A.; whole or partial
reproduction of this manual is prohibited.
The original is filed at Robur S.p.A.
Any use of this manual other than for personal consultation must be previously authorised
by Robur S.p.A.
The rights of those who have legitimately filed the registered trademarks contained within
this publication are not affected
With the aim of continuously improving the quality of our products, Robur S.p.A. reserves
the right to vary the data and contents of this manual without prior notice.

Prefazione
3
FOREWORD
This manual is for anyone who must install or use the Robur Calorio series gas fired
heating units.
This manual especially applies to the plumbers who must install the heating unit, to the
electrician who must connect the heating unit to the electrical system and to the end user
who must check that it functions properly.
This manual is also for the technicians regarding the principle maintenance operations.
Summary
This manual is composed of six sections:
Section 1 pertains to the end user, the plumbing installer, the electrical installer and to
the qualified service engineer; it provides general warnings, technical data and the
construction characteristics of the Calorio series heating units.
Section 2 is for the end user; it provides all the information necessary for the correct use
of the Calorio series heating units.
Section 3 is for the plumbing installer; it provides the necessary indications to the
plumber in order to perform the correct installation of the Calorio series heating units.
Section 4 is for the electrical installer; it provides the necessary information to the
electrician in order to perform the electrical connections of the Calorio series heating units.
Section 5 is for the qualified service engineer; it provides the instructions to regulate the
flow of gas and to perform the gas conversion. It also gives indications regarding
maintenance.
Section 6 is for the end user, the plumbing installer, the electrical- installer and the
qualified service engineer. It contains information concerning the accessories available
for the Calorio series.
For rapid access to the sections, refer to the relative graphical icons (see Table 2)
contained in the right margin of the odd-numbered pages.

Linea Calorio – Radiatori individuali a gas – Libretto d’installazione, uso e manutenzione
4
Icon definition
The icons present in the margins of the manual have the following meanings.
Danger
Warning
Note
Begin operational procedure
Reference to another part of the manual or to
a different manual
Table 1 – Descriptive Icons
General information and technical
characteristics
End user section
Plumbing installer section
Electrical installer section
Qualified service engineer section
Accessory section
Table 2 – Icons sections

Indice dei contenuti
5
TABLE OF CONTENTS
SECTION 1 GENERAL INSTRUCTIONS AND TECHNICAL CHARACTERISTICS ........7
1.1 GENERAL ISTRUCTIONS................................................................................................................. 7
1.2 MAIN OPERATING CHRACTERISTICS ........................................................................................... 9
1.3 PRODUCT CHRACTERISTICS....................................................................................................... 10
1.4 TECHNICAL DATA.................................................................................. ........................................11
1.5 DIMENSIONS OF CALORIO CONVECTORS................................................................................ 12
SEZION 2 END USER SECTION.....................................................................................13
2.1 HOW TO LIGHT ON AND OFF THE GAS CONVECTOR............................................................... 13
LIGHT ON (HEATING)............................................................................................................... 15
HUMIDIFIER (models 42 e 52).................................................................................................. 16
TEMPORARY SHUT DOWN ......................................................................................................16
SUMMER VENTILATION (model 52) ........................................................................................ 16
SEASONAL STOP......................................................................................................................16
2.2 PROGRAMMABLE TIMER (model 42 and 52)............................................................................... 17
SET AND PROGRAMMING OF THE TIMER .......................................................................... 18
STARTING CONDITIONS ........................................................................................................ 18
SET THE HOUR AND THE DAY............................................................................................... 18
SET THE ON/OFF PROGRAMS ............................................................................................... 19
CANCEL A SINGLE PROGRAM ............................................................................................... 20
CANCEL ALL PROGRAMS, HOUR AND DAY ........................................................................ 20
THE SKIP FUNCTION .............................................................................................................. 20
SECTION 3 INSTALLER PLUMBER ...............................................................................21
3.1 GENERAL NORMS OF INSTALLATION.........................................................................................21
3.2 FLUE EXHAUST AND COMBUSTION AIR PIPE............................................................................ 22
3.3 INSTALLATION SEQUENCE .......................................................................................................... 23
INSTALL THE GAS CONVECTOR TO THE WALL .................................................................. 23
CONNECT THE GAS CONVECTOR TO THE GAS NETWORK INSTALL THE EXTERNAL
TERMINAL 26.............................................................................................................................26
SECTION 4 ELECTRICAL INSTALLER...........................................................................29
4.1 ELECTRICAL CONNECTION .........................................................................................................30
SECTION 5 MAINTENANCE AND SERVICING...............................................................31
5.2 HOW TO REGULATE THE GAS VALVE.......................................................................................... 31
5.3 NATURAL GAS FEEDING............................................................................................................... 31
MODELS 41, 42 and 51................................................................................................................... 31
MODEL 52 – REGULATION PRESSURE AT THE MAXIMUM HEAT OUTPUT............................ 32
MODEL 52 – REGULATION PRESSURE AT THE MINIMUM HEAT OUTPUT ............................. 32
5.4 L.P.G. ................................................................................................................................................33
FEEDING REGULATION OF THE PRESSURE TO THE BURNER FOR THE MODELS 41, 42
AND 51............................................................................................................................................ .33
MODEL 52 – REGULATION OF THE PRESSURE AT THE MAXIMUM HEAT OUTPUT.............. 34
MODEL 52 – REGULATION OF THE PRESSURE AT THE MINIMUM HEAT OUTPUT......... ......34
5.5 REPLACEMENT OF THE BURNER INJECTOR: FROM NATURAL GAS TO L.P.G. ..................... 35
REPLACEMENT OF THE BURNER INJECTOR: FROM L.P.G. TO NATURAL GAS.............. .....36
5.6 SECURITY DEVICES ........................................................................................................................37

6
5.7 FUNCTIONING ERRORS................................................................................................................ 38
CASE 1: THE UNIT STOPS DURING THE FIRST PHASE OF START UP ........................... 38
CASE 2: THE UNIT STOPS DURING THE STANDARD FUNCTIONING............................... 38
5.8 CLEANING AND MAINTENANCE.................................................................................................. 39
5.9 ASSISTANCE................................................................................................................................... 39
SECTION 6 ACCESSORIES ..........................................................................................41
TOWEL WARMER (Code O-SPP000)..................................................................................... 41
FOOD WARMER (Code O-SPP001)........................................................................................ 41
STICK FRAGRANCE DIFFUSER (Code O-SPP002) ............................................................... 42
UMBRELLA STAND (Code O-SPP003) .................................................................................... 42

Sezione generalità e caratteristiche tecniche
7
SECTION 1 GENERAL INSTRUCTIONS AND TECHNICAL
CHARACTERISTICS
In this section there will be general instructions to be followed for the installation and use
of gas fired convectors Calorio series, a short paragraph about the operation of the gas
convectors, their main characteristics and the technical data.
1.1 GENERAL INSTRUCTIONS
This manual is an integral and essential part of this product and must be given to the end
user.
This unit must be exclusively used for the purpose it was intended. Any other use is to be
considered improper and therefore dangerous.
The manufacturer cannot be held responsible for any damage resulting from incorrect
installation or failure to comply with the manufacturer’s instructions.
The unit must be installed respecting the internal laws.
Do not obstruct the intake air of the fan neither the outlet air grid.
In case of failure and/or bad/poor operation, stop the unit (shut off the gas supply)
do not attempt any repair or direct servicing. Call only qualified service engineer.
Any misapplication of the above instructions can compromise the safety of the unit.
To ensure the efficiency of the unit and its proper operation, it is essential that a qualified
service engineer carry out annual maintenance in accordance with the manufacturer’s
instructions.
Qualified service engineers are those having specific technical experience in
the installation of heating units for residential applications, designated by a local authority.
Should the unit be sold or transferred to another owner, ensure that the manual remains
with the unit for the use of the new owner and/or the installer.
Before starting the unit, qualified personnel must check:
- that the electrical and the gas supply ratings do exactly correspond to those
shown on the original rating plate.
- that the exhaust flue and the inlet air supply are properly installed.
- that the combustion air feed and exhaust are properly fitted in accordance with
the existing standards.
- the proper internal and external sealing of the combustion apparatus
- that fuel flow control is in accordance with the unit power requirements.
- that the unit is fed with the specific type of fuel for which it has been pre-set.

8
- that the fuel supply pressure is within rated limits.
- that the fuel supply system is suitable for the unit and that all safety and control
devices required by the existing standards are duly installed
Do not use gas pipes to earth electric apparatus.
Avoid unnecessary supply when the unit is not in use and always close the gas valve.
In case of prolonged absence isolate the main gas inlet valve to the unit and disconnect
all electric supply.
IF YOU SMELL GAS
• do not activate electric switches, telephones or any other object or device that
may cause sparks.
• shut off gas supply.
• immediately open doors and windows to create drafts of air that purify the room.
• call for qualified servicing engineer.

9
1.2 PRODUCT DESCRIPTION AND MAIN OPERATING
CHARACTERISTICS
The Calorio gas heater, is an independent heating product with an isolated combustion
chamber and forced draught.
It has been projected to be installed indoor.
It can operate either with natural gas and liquid propane gas (category II2H3+, type C13,
regulation EN 1266).
The combustion air intake and the exhaust of fumes are external to the system through
two coaxial pipes and are drawn by the operation of an electric fan placed in the
combustion circuit. Therefore, the unit will have to be installed on an external perimeter
wall or close to it depending on the maximum extension of the coaxial pipe system (see
section Errore. L'origine riferimento non è stata trovata. ”Installation”).
The operation principle of the Calorio range is based on a convective movement of the
ambient air. The air going through the unit is drawn upwards and heated then diffused in
the ambient through the outlet grille. Particularly models 42, 51 and 52 are defined as
”ventilated” since the movement of ambient air is due to the presence of a fan placed in
the lower section of the unit. Except model 41, which is defined as ”static” since the
convective motion is natural.
The operation of the unit is very simple and completely automatic thanks to the
thermostatic regulation and the programmable timer (standard equipment on models 42
and 52, optional on the other models): The end user only needs to start the unit, choose
the desired temperature (to be selected on the thermostat) and, for the models 42 and 52,
set the operation period of the unit on the programmable timer.
The isolated combustion chamber is a best safety feature for the premises where the unit
is to be installed: there is no risk of leakage of the combustion products and neither
oxygen necessary for the combustion has been taken from indoor. It is not necessary
the installation of any grid or openings for the ventilation of the ambient.
A special flame detection device, that operates through a ionization flame sensor,
immediately stops the gas supply in case the flame accidentally goes off.
Models 42 and 52 grant a higher comfort thanks to an air humidifier placed on the left
hand side of the unit.
Additionally model 52 can also operate in summer time (the fan can work while the burner
is off). This allows a pleasant summer ventilation (movement of room air).

10
1.3 MAIN COMPONENTS
Calorio gas fired convectors are equipped with:
- Combustion chamber and stainless steel tubular heat exchanger patented
with very high efficiency;
- Control box with set of the ambient temperature;
- Centrifugal fan (patented) with double anti vibration system (model 41
excluded);
- Flue blower;
- Security device with ionisation flame sensor;
- Programmable timer (for models 42 and 52);
- Air humidifier (for models 42 and 52);
- Double power min- max (for model 52);
- Summer ventilation (for model 52);
- Coaxial pipes for combustion air intake and exhaust flue Ø 49/35 mm;
- Wall external stainless steel terminal (patented) min. dimensions;
- Panel plate painted with epoxy powder, available in three colours: beige, white
and grey.

11
1.4 TECHNICAL DATA
DESCRIPTION U.M. 41 42 51 52
TYPE OF EQUIPMENT C13
UNIT CATEGORY II2H3+
MAXIMUM NOMINAL HEAT INPUT
1
kW 3,25 3,62 4,65 5,23
MAXIMUM NOMINAL HEAT OUTPUT kW 2,92 3,26 4,19 4,71
REDUCED NOMINAL HEAT INPUT
1
kW --- --- --- 3,60
REDUCED NOMINAL HEAT OUTPUT kW --- --- --- 3,18
MAX/MIN GAS CONSUMPTION
1
NATURAL GAS
L.P.G. G30
L.P.G. G31
m
3
/h
kg/h
kg/h
0,344
0,256
0,251
0,383
0,285
0,280
0,492
0,367
0,360
0,553/0,381
0,412/0,284
0,405/0,278
EFFICIENCY % 90%
FEEDING PRESSURE WITH NATURAL GAS
MAX
NOMINAL
MIN
mbar 25
20
15
FEEDING PRESSURE WITH L.P.G. (G30)
MAX
NOMINAL
MIN
mbar 35
30
28
FEEDING PRESSURE WITH L.P.G. (G31)
MAX
NOMINAL
MIN
mbar 40
37
30
NOISE LEVEL (AT 3 M) MAX
MIN dB(A) 32
---
33
---
35
---
39
35
INJECTORS DIAMETERS NATURAL GAS
L.P.G.
mm see Table 4 at page 35
PRESSURE TO THE BURNER AT THE MAX POWER
NATURAL GAS
L.P.G. G30
L.P.G. G31
mbar 10,5
28,7
36,7
10,5
28,8
36,7
10
29
37
9
28
35,5
PRESSURE TO THE BURNER AT THE REDUCED
POWER NATURAL GAS
L.P.G. G30
L.P.G. G31
mbar ---
---
---
---
---
---
---
---
---
5,0
14,7
19,7
GAS CONNECTION (UNI ISO 7/1) Rp 3/8 F
Ø HOLE DIAMETER FOR INLET/OUTLET PIPE mm 50
POWER SUPPLY 230V 50Hz monofase
WATTAGE W 20 45 65 86
MAX LENGTH COAXIAL PIPES m 1
WEIGHT kg 24 25 26 26
Table 3 – Technical data 41, 42, 51 and 52
1 DATA RELATED TO THE HEAT INPUT AND TO THE GAS CONSUMPTION ARE REFERRED, TAKING IN CONSIDERATION THE
NORM PREN 437, AT THE FOLLOWING VALUES: NATURAL GAS: P.C.I. 34.02 MJ/M3
AT 15ºC 1013.25 MBAR; BUTAN (G30):
P.C.I. 45.65 MJ/KG; PROPAN (G31): P.C.I. 46.34 MJ/KG

12
1.5 DIMENSIONS OF CALORIO GAS CONVECTORS
Figura 1 – Dimensions of Calorio 41, 42, 51 and 52 convectors
71,5cm
35,4cm
10 cm10 cm
55,3 cm
27,65 cm27,65 cm
Ø4,9cm
Ø3,5cm
min8cmmin10cm
20,8 cm
3 cm

Sezione utente
13
F
B
E
C
D
H
G
A
C
D
B
A reset key
B temperature regulation knob
C red light indicating unit shutdown
D green light indicating working of the unit
E manual/programmed key
F programmed timer
G min/max output key
A
B
C
D
E
F
SECTION 2 END USER SECTION
In this section you will find all information necessary to let Calorio gas convectors
functioning in a correct way.
The functioning of Calorio gas convectors is leaded by the ambient thermostat equipped
with all models and, in models 42 and 52, by the programmable timer.
2.1 HOW TO START AND TURN OFF THE GAS CONVECTOR
The first start up of the unit must be carried out by qualified service engineer.
Before turning the unit on the qualified service engineer must check:
• That the values shown on the unit plate are exactly the same as the ones of the
electric and gas supply.
• The unit adjustment actually responds to the unit operating capacity.
• The proper working of air inlet and fume exhaust flue system (in accordance with
the existing regulations).
CALORIO 52 CALORIO 51/41 CALORIO 42
H summer/winter and reset key
Figure 2 – Control panel

14

Sezione utente
15
START UP (HEATING)
To have: the gas convector connected to the electrical and gas network.
1. Open the gas supply valve.
2. Supply electricity to the convector by connecting the tri pole wiring
3. For models 42 and 52 set the timer according the end user specific requirements
(see ”programmed timer” section, model 42 and 52).
Set ”E” key (see Figure 2 )
manual/programmed on the desired system of operation of the unit: loose key - MAN
position in case the unit is required to operate through the room thermostat or
pressed key - AUTO position in case the unit is required to operate also by means of
the programmed timer.
4. Turn the B knob for temperature regulation at the highest desired temperature (see
Figure 2).
5. After 30 seconds approx. the gas valve opens and the ignition electrode starts
sparkling for a max. of 10 seconds.
6. In presence of flame the ignition electrode stops automatically the sparkling keeping
the unit on; the green light D will be on (see Figure 2).
The light on of the green light D indicates the correct functioning of the convector.
7. On the contrary the control box will block the unit and the blower will stop, this
function is characterised by the permanent “on” of the red light C (see Figure 2).
The light on of the red light C indicates the flame block of the convector.
In order to let the unit restart it is necessary to press the reset button (A) for models
41, 42 and 51, while for the model 52 it is necessary to press twice the reset button
(H) (see Figure 2).
8. Once the convector is on, turn the thermostat knob clockwise to increase the room
temperature and in the opposite way to decrease it.
The values shown on the thermostat knob are typical. The temperature value is
dependent upon the environment where the unit has been installed. An actual
relationship between the thermostat value and the room temperature can be
achieved by measuring the temperature of the room at a certain thermostatic
regulating value.
9. In the model 52 pressing the G key (see Figure 2) a higher output can be selected
for a quick warming of the room or a minimum output rate can be selected to
maintaining the existing temperature value. The fan starts operating automatically
only when it receives demand from the fan thermostat, and the exchanger is heated
this in order to avoid the cold air draught in the room. The fan will turn off when the
exchanger is cold.

16
HUMIDIFER (models 42 and 52)
For a higher comfort the convectors models 42 and 52
have been equipped with a humidifier. Its use is very simple.
It is enough to fill in periodically, by means of
a funnel, the small tank located on the left side
of the unit (see Figure 3)
For a higher comfort the convectors models 42
and 52 have been equipped with a humidifier.
Its use is very simple. It is enough to fill in
periodically, by means of a funnel, the small
tank located on the left side of the unit (see
Normally the tank needs to be refilled after
4-5 days.
Figure 3 –Humidifier location
The use of water low in limestone is advisable (possibly use distilled water) in order
to prevent any possible calcareous sedimentation that may be difficult to remove.
Also anti calcareous tablets for humidifiers are commercially available. The
humidifier capacity is 0,35 litres.
TEMPORARY TURNING OFF
1. To temporarily stop the unit turn the thermostat knob to the minimum temperature.
Turning the thermostat to the minimum values, temperature will
be regulated some degrees above zero value. This will prevent
freeze-up.
For all models equipped with time programmer (42 and 52) the unit can temporarily be
stopped by turning the ”A” key to the O position. (see Figure 2).
Do not turn down power to switch off the units. This procedure can ruin the
equipment.
SUMMER VENTILATION (model 52)
To have: the gas convector connected to the electrical network.
1. Close the gas valve and check that the electrical supply will be on.
By pressing the summer/winter H key (see Figure 2) , only the fan starts working.
This will allow a light and pleasant ventilation of the ambient air.
Water filling hole

Sezione utente
17
SEASONAL STOP
1. Close the gas valve.
2. Cut off the electrical supply.
2.2 PROGRAMMABLE TIMER (models 42 and 52)
Figure 4 – Programmable timer
KEYS FUNCTIONING
On / Off switch
Position I: The appliance is controlled by the room thermostat. In this
condition the functioning of the gas convector depends ONLY
from the temperature set on the ambient thermostat: it will not
follow any program of the timer.
Position AUTO: The appliance is controlled by the timer and the room thermostat.
In this condition the gas convector works ONLY during the
starting hours set on the timer when there is heat demand
(ambient temperature lower than the one set on the ambient
thermostat).
Position O: The appliance is turned off
Setting / regulation switch
Position : Time setting
Position RUN: Operation (the display shows the current time)
Position : Setting of Programming
A) Programmes selection
B) Programmed day setting
C) Hours setting
D) Minutes setting
A
B
E
C
D
F
G
R

18
1 2 3 4 5 6 7
0:00
1 2 3 4 5 6 7
E EE
1 2 3 4 5 6 7
0:00
1 2 3 4 5 6 7
0:00
1 2 3 4 5 6 7
0:00 1
☼1
E) SKIP button (it temporarily deletes the programmed schedule)
R) Reset button
CHARACTERISTICS
- Long life lithium battery after 48 hours recharge.
- Visual of day and current hour.
- Daily and weekly program.
- Blocks of programme due to the repetition of timing insertions:
1-2-3-4-5 (Monday to Friday)
1-2-3-4-5-6 (Monday to Saturday)
1-2-3-4-5-6-7 (Monday to Sunday)
6-7 (Saturday to Sunday)
- Minimum duration of conversion 1 minute.
- Quick surge: keeping pulled any selection button, the surge will become quicker.
- N°16 available programs (8 ON and 8 OFF).
SET AND PROGRAMMING OF THE TIMER
STARTING CONDITIONS
- Position the right selector B (see Figure 4) in RUN position.
Press reset R button (see Figure 4). The indicator on the display
will blink.
- If reset R button will be pressed (see Figure 4) when the selector
B is in position, on the display will appear the error warning
EEE. Moving the selector B in RUN position the advice will
disappear; press R button again to return to the previous position.
- If B selector will be moved in position, the indication on the
display will remain fixed.
- If B selector will be moved in RUN position, the advice on the
display will remain fixed, but if there will be the double point, then
it will blink.
- If B selector will be moved in position, the advice on the
display will blink. On the display will appear the light symbol (☼)
and the written 1 and 1.
SET THE TIME AND THE DAY
To have: the B selector in position.
1. We plan to set 15:16 hours on Wednesday.
2. Set the day of the week.
Pressing the button 1...7 (button D of Figure 4) triangular index
inch of one unit. Number 1 is Monday, number 2 is Tuesday
and so on.
3. Set of the hour and minutes.
In order to obtain 15:16 h press button h for the hours, button m
for minutes. The advice on the display will advance every time
1 2 3 4 5 6 7
0:00
1 2 3 4 5 6 7
15:16

Sezione utente
19
you will press the button. Keeping pressed the button over 2
seconds the surging will become quicker until you will stop
pressing the button.
4. After having set the day and the hour, move the right B selector in the RUN position.
The advice on the display is fixed, but the double point will blink.
SET THE ON/OFF PROGRAMS
The timer has 16 programs:
● n.8 ON programs (1-3-5-7-9-11-13-15)
● n.8 OFF programs (2-4-6-8-10-12-14-16)
The starting program of the unit is visible thanks to the lamp on the right side of the
display.
When the lamp does not appear on the display it means that’s an OFF programme
To have: The B selector in position. The advice on the display blinks and on the
right side of the display they appear the writing 1 and 1 and the lamp symbol
corresponds to the ON programme.
1. Press the button 1...7 to set the day or the days we want the
start of the units (for example Tuesday corresponds, on the
display, to the day n°2). To set the starting timetable desired
press button h for the hours and the button m for the minutes
(for example 9 and 3 minutes). At each pressure of the button
the advice on the display will advance. Keeping pressed the
button over 2 sec., the surging will become quicker until you
will stop pressing the button.
2. Press the button (ref. C of Figure 4). On the right side of the
display it will appear the number 2 without the symbol of the
lamp corresponding to the OFF programme.
3. Press the button 1...7 to set once again the same day or the
same days previously chosen for the ON programme 1
(Tuesday in the example). To set the OFF hour press the
button h and the button m for the minutes(in the example 11h e 4
min.).
4. Repeat from point 1 to point 3 to set other ON/OFF programs.
In the case of same ON/OFF timetable during the week, programming will be easier
if we utilise blocks of days:
● 1-2-3-4-5 (from Monday to Friday)
● 1-2-3-4-5-6 (from Monday to Saturday)
● 1-2-3-4-5-6-7 (from Monday to Sunday)
● 6-7 (Saturday and Sunday)
1 2 3 4 5 6 7
0:00 1
☼1
1 2 3 4 5 6 7
9:03 1
☼1
1 2 3 4 5 6 7
0:00 1
☼1
1 2 3 4 5 6 7
0:00 2
1
1 2 3 4 5 6 7
11:04 2
1

20
5. Once the programming will be finished it is better to control and check not having
set programs in conflict among them in order to avoid ON and/or OF not desired.
Pressing the button the various ON/OFF set programs will be displayed.
6. Move the selector B in the RUN position of the standard use of the timer. On the
display will appear the advice of the day, of the current hour; the written 1 and the
symbol of the lamp will appear or not depending if it will be an ON period or an OFF
period.
Programs set will be active ONLY from the day after to the one they have been
set.
CANCEL A SINGLE PROGRAM
To cancel a single programme, please proceed as follows:
1. Move the right selector (see ref. B of Figure 4) in position.
2. Press the button and choose the programme we want to
cancel.
5. Press contemporary button and button SKIP (see ref. G of
Figure 4) for at least 2 sec. and the set programme will erase.
6. The advise of erase will be indicated on the display by the
continuous blinking of the figures 0:00.
CANCEL ALL PROGRAMS, HOUR AND DAY
To cancel all the programs and the set hour press the reset R button and keep pressing it
for at least 2 sec. All the programs and hour the day, previously set, will be cancelled.
THE SKIP FUNCTION (PROGRAM SKIP)
To have: the timer with the hour, the date and the functioning/starting set programs.
1. Move the right selector (see ref B of Figure 4) in RUN position.
2. Press SKIP button (see ref. G of Figure 4) to bypass the
present programming, and then resume the functioning set to
the following service demand. This function is indicated on the
display by using the symbol of crossed arrow (skip symbol).
3. Skip function could be revised any time, by pressing SKIP
button one more time. The functioning will re start with the
programs set and the skip symbol will disappear from the
display.
Skip functioning could be activated only in RUN position.
1 2 3 4 5 6 7
0:00 2
1
1 2 3 4 5 6 7
15:161☼
X
1 2 3 4 5 6 7
15:16

Sezione installatore idraulico
21
SECTION 3 PLUMBER INSTALLER
In this section you can find all the necessary instructions to install Calorio Series room
heaters from the hydraulic point of view.
3.1 GENERAL REQUIREMENTS FOR CALORIO SERIES
The installation shall be made, according to the Manufacturer’s instructions, by qualified
service engineers.
By Qualified Service Engineers we mean the personnel with specific technical
skills in the field of the heating system components. In any case, if you need more
information please contact the Pre-Sale Department of ROBUR S.p.A. (tel. +39
035/888111).
An incorrect installation can cause damages to people, animals and property. In case of
erroneous installation, the Manufacturer cannot be held responsible for such damages.
The installation must be performed in compliance with the existing European laws, rules
and regulations referred to gas and electrical appliances.
In particular it must be respected all related to the distance between the flue terminal and
windows, balconies, gutters, etc., and distances to the soil or to the sidewalk.
The terminal does not require any type of protection.
For the correct installation is required to respect the following conditions:
- The gas convector must be installed indoor on an external perimeter wall or closet
o it, respecting the distances indicated in Figura 1.
- The minimum recommended distance from the basement is 8 cm (see Figura 1)
and possibly not superior to 35 cm because, for bigger height there will be a non
uniform distribution of the heat in the building.
- Keep a minimum distance of 10 cm between the sides of the gas convector and
any type of object in order to permit the dismounting and re mounting of the panel.
- If a bracket would be left on the unit, a space of 10 cm (at least) must be
considered.
- Make sure that it exists an adequate furniture and network of gas.
- Make sure that it exists an adequate connection to the electrical network (230V
50Hz).

22
L max = 1 meter
3.2 EXHAUST AND AIR INTAKE PIPES
Exhaust/air intake pipes of Calorio gas convectors could be realised as follows:
• With coaxial pipes and exit on the wall of installation (length max pipes 1 meter)
(see Figure 5).
• With coaxial pipes and exit 90° (length max pipes 1 metro) (see Figure 6). In this
case it is necessary to use a 90° bend for coaxial exhaust outlet available as
accessory (see Section accessoriy).
Figure 5 – Installation with coaxial pipes
Figure 6 - Example of installation with coaxial at 90°
L max = 1 meter

23
3.3 SEQUENCE OF INSTALLATION
With reference to the installation project, prepare gas supply and electrical supply lines
and holes for exhaust outlet and intake air for combustion.
INSTALL THE CONVECTOR ON THE WALL
1. Before unpacking the unit check that the external packaging is in good condition and
that no damage has occurred during transportation, if so promptly contact your
supplier
2. Unpack the unit from its protection wrapping, slip off the inlet and outlet flues first.
DO NOT THROW AWAY THE TEMPLATE where a drilling guide for the correct
installation of the unit is given.
3. Fix the template to the wall where the unit is to be installed making sure it is
perpendicular to the floor.
4. Drill a hole (Ø 50 mm) to locate the main pipe as well as the A holes (see, Figure 8)
to fix the support bracket (drill 6 mm holes for the insertion of the support frame).
The Ø 50 mm hole for the type of installation described here above can be realised
by a rotary cutter (see Section accessoriy) or smaller holes realised by a simple
drilling machine on the perimeter.
5. Adapt the length of the pipes (exhaust outlet and intake air) to the effective depth of
the wall, cutting the exceeding part: for the exact length see Figure 7.
In the Ø 49 pipe do not cut the side with the edging that will be used for fixing the
pipe.
In the Ø 35 pipe do not cut the side with a skirted end that will be necessary to
connect the pipe to the unit.
6. Remove the template from the wall.
Figure 7 – Information about air/flue pipes cutting

24
Figure 8 – Positioning of the template and drilling for models 41, 42, 51 and 52
7. Locate the supporting bracket and the air pipe Ø 49, making sure that the pipe edge
perfectly enters the matching hole in the supporting frame (see Figure 8).
8. Fix the supporting bracket with the screws and place the adhesive seal around the
air inlet pipe hole (see Figure 8).
9. Locate the auto adhesive seal in sponge material on the support frame (place it on
the back of the unit) as indicated in Figure 9. Try to avoid re positioning which could
bring difficulties.
10. Match the extreme part of the exhaust pipe (Ø 35 mm) on the unit stub pipe(Figure
10).
11. Install the gas convector to the wall leaning edge C present on the inferior edge of
the frame to the supporting bracket, as indicated in Figure 11.
Guarnizione
autoadesiva
Figure 9 – Seal positioning
staffa di sostegno
tubo aria
guarnizione adesiva
A
A

25
Figure 10 – Positioning exhaust flue pipe
Figure 11 – Hooking the unit to the support bracket
12. Match the edges B to the extremity A of the supporting frame and press the unit
against the wall, in the way it remains fixed to the frame support (see Figura 12).
13. Fix the unit to the supporting frame by using the two side screws as indicated in
Figura 12.
Figura 12 – Hook detail
A
B
A
A
B
B
D C
D
Flue pipe Ø 35

26
CONNECT THE CONVECTOR TO GAS NETWORK
1. The connection to the gas network must be done with a rigid copper or steel pipe
and fittings; as alternative it could be also utilised a flexible stainless steel pipe.
2. Connect the gas pipe to the nipple you find on the right bottom part of the gas
convector. (see ref. A of Figure 13 and Figure 14).
The connection to the gas pipe must be carefully sealed in order to grant the leak-
tightness by using a sealer according to the EN 751-1 and EN 751-2 law.
The connection must be realised without any tension to the pipe or to other
components of the unit.
Provide a shut-off cock on the gas network, in vertical position and easily
accessible, as required in the norms about gas installations.
Figure 13 – Positioning gas feed for model 52
Figure 14 – Positioning gas feed models 41, 42 and 51
A
A

27
THE TERMINAL GRID INSTALLATION
1. Locate the terminal grid in aluminium to the external wall perfectly matching the pipe
end and draw the location of the three holes for the screw anchors (see Figure 15).
The terminal grid must be mounted with the outlet flue in vertical position.
2. Displace the terminal and drill the holes (Ø 6 for the screw anchors provided with the
unit).
3. Relocate the terminal and fix it with the screws (see Figure 15).
Figure 15 – Terminal grid installation

28

Sezione installatore elettrico
29
SECTION 4 ELECTRICAL INSTALLER
In this section you can find all the necessary instructions to make the electrical
connections for the Calorio Series gas fired convectors.
To have: the gas convector installed.
The electrical connections must be made by qualified personnel. Before
performing this operation, cut off the electrical supply.
1. Check that the supply voltage is 230V - 50Hz mono phase.
2. In order to connect the electrical power to the electrical network it is sufficient to wire
the tri- pole plug, furnished with the unit, as indicated in Figure 16 by using a 3x0,75
mm2
cable.
3. Connect the tri- pole plug previously wired in the socket positioned in the bottom
right part of the unit.
We have the total electrical security only when the unit is correctly connected to a
good earth connection, made as previewed by security local norms. Do not use gas
pipes as earth connection of electrical units.
Figure 16 – Wiring of tri- pole plug

30
4.1 WIRING CONNECTIONS
Figure 17 – Electrical connections
EV Gas valve
(for model 52:
EV1 Solenoid gas valve for maximum
heating power
EV2 Solenoid gas valve for the minimum
heating power)
F.A. Suppression filter
GND Ground
L Line
M1 Limit thermostat
M2 Ventilation thermostat
(not present on mod.41)
M4 Control box
M9 Fuse 2 A
N Neutral
RD Rectifier
RP7 Ignition electrode
RP8. Detection electrode
S Combustion air blower
SB Shut down red pilot light
SF Working green pilot light
V Fan
(not installed on mod.41)
Z1 Resetting key and, for mod.52,
summer/winter switch
Z2 Min/max heating power switch
Z3 Manual/programmed switch
(available only on mod.42 and 52)
Z8 Timer programmer
(available only on mod.42 and 52)
Z9 Ambient thermostat

Sezione assistenza tecnica
31
SECTION 5 MAINTENANCE AND SERVICING
In this section you can find a few maintenance suggestions and the instructions which are
necessary to technical assistants in order to adjust the gas valve and replace the gas.
5.2 HOW TO ADJUST THE GAS VALVE
The gas feeding circuit is provided with a gas valve equipped with double knock and
pressure regulator to control the gas inlet flow. All models are supplied to operate with
natural gas and are equipped with an LPG conversion kit. During the final tests each
unit is set to operate with natural gas. After installation it is necessary to check the
pressure to the burner. All controls must be carried out with an operating unit free from its
outer casing.
The gas valve adjustment must be performed by qualified personnel. To this
regard, ROBUR S.p.A. can dispose of a network of Assistance Centres which can be
reached through the point of sale, the local agent or by calling directly the Customer
Assistance of ROBUR S.p.A. (tel. +39 035/888111).
NATURAL GAS FEEDING
MODELS 41, 42 AND 51
To have: the gas convector installed and connected to the electrical and gas
network.
1. Remove the cover.
2. Connect a pressure gauge in A (see Figure 18), after having removed the sealing
screw.
3. Turn on the unit (see “START UP (HEATING) paragraph” at page 15).
4. Portare il termostato alla massima richiesta di calore.
5. Regulate the feeling pressure to the burner at the requested value (see Table 3 at
page 11) by means of B regulator (Figure 18) in clockwise sense to increase it, in the
opposite way to decrease it (use a screwdriver for this operation).
6. Turn off the unit, disconnect the pressure gauge, re- fix the sealing screw.
After the setting operation, it is obligatory to seal the regulation screws of the valve.
7. Re-mount the cover.

32
Figure 18 – sit 850 valve kit for models 41, 42 and 51.
MODEL 52 – REGULATION FOR MAXIMUM HEAT OUTPUT
network.
2. Position the summer/winter switch (see ref. H of Figure 2 at page 13) on winter
mode.
3. Remove the plastic cover C of the gas valve (see Figure 19).
4. Connect a pressure gauge in position E of Figure 19.
5. Turn on the unit (see paragraph “START UP (HEATING)”) at page 15.
6. Regulate the pressure to the burner, using B screw (see Figure 19), to the requested
value (see Table 3 at page 11), in clockwise sense to increase it and in the opposite
way to decrease it (use a setscrew wrench n.10).
7. Proceed to the pressure regulation at the reduced heating power as indicated here
below.
MODEL 52 – REGULATION FOR REDUCED HEAT OUTPUT
8. Press max/min key (see ref. G of Figure 2 at page 12). In this way the unit will run at
the reduced heating power.
9. Keeping unmoved the screw B, set by means of screw A the pressure of reduced
heating power at the requested value (see Table 3 at page 11), in clockwise sense
to increase it and in the opposite way to decrease it (use a screwdriver).
10. Relocate the plastic cover C.
After the setting operation turn off and turn on the unit again and verify that the
pressures to the burner are correct. If necessary repeat the operation.
After the setting operation it is obligatory to seal the screws of valve regulation.
A
B

33
11. Re- mount the cover.
Figure 19 – Valve kit for model 52
5.3 LPG CONVERSION
To change feeding from natural gas to LPG it is necessary to modify the unit using the
LPG conversion kit that is supplied as standard supplied with the unit. Follow the
instructions detailed in ”conversion to another type of gas” section and proceed as follows:
PRESSURE REGULATION TO THE BURNER FOR MODELS 41, 42 AND 51
network.
2. Connect a pressure gauge in A (see Figure 18), after having removed the sealing
screw.
3. Turn on the unit (see paragraph “START UP (HEATING)” at page 15).
4. The maximum operating pressure only depend on the distribution network pressure
level which needs to be adequately regulated at 30 mbar (for G30 gas) or at 37
mbar (for G31 gas). The decreasing of the network pressure is possible by using
suitable first stage pressure regulators, close to the liquid gas tank, to reduce the
pressure to 1,5 bar and a second stage pressure regulator from 1,5 to 0,03 or 0,037
bar close to the unit (reducers have to be installed always outdoor). Therefore it is
necessary exclude the pressure regulator by closing completely the screw B of
Figure 18.
In the case it could not be reached the adequate setting, operate on
the second stage regulator.
5. Turn off the unit, disconnect the pressure gauge and re- fix the seal screw.
After the setting operation it is obligatory to seal the screws of gas regulation.
E
B
C
A
C

34
MODEL 52 – REGULATION FOR MAXIMUM HEAT OUTPUT
network.
2. Position the summer/winter switch (see ref. H of Figure 2 at page 13) on winter
mode.
3. Remove the plastic cover C of the gas valve (see Figure 19).
4. Connect a pressure gauge in position E of Figure 19.
5. Turn on the unit (see paragraph “START UP (HEATING)”) at page 15.
6. Exclude the pressure regulator closing completely the screw B (see Figure 19). In
this way the pressure to the burner is directly related to the network pressure; ensure
then to have a 30 mbar in the gas network (for gas G30) or a 37 mbar pressure (for
gas G31). The network pressure level can be reduced by using a special first stage
pressure reducers, placed close to the liquid propane tank, to reduce the pressure to
1,5 bar and a second stage reducer from 1,5 to 0,03 or 0,037 bar close to the unit
(reducers must be installed always outdoor).
7. Proceed with the pressure setting at the reduced heating output as indicated here
below.
MODEL 52 – REGULATION FOR REDUCED HEAT OUTPUT
8. Verify that B screw is completely closed.
9. Press max/min switch (see ref. G of Figure 2 at page 13). In this way the unit will run
at the reduced heat output.
10. Keeping unmoved B screw, set by means of screw A the pressure of reduced
heating power to the requested value (see Table 3 at page 11), in clockwise sense
to increase it and in the opposite sense to decrease it (use a screwdriver).
11. Relocate the plastic cover C.
After the setting, turn off and turn on the unit and verify that the pressures at the
burner are correct. If necessary repeat the operation.
After the setting operation it is obligatory to seal the screws of valve regulation.

35
5.4 HOW TO REPLACE THE BURNER INJECTOR
The gas replacement operation must be performed by qualified personnel. A
wrong, incorrect or imprudent installation of the gas circuit can cause very dangerous gas
leaks on all the circuit and in particular in the tampered areas. Moreover, use suitable
sealants on all fittings. If the type of gas indicated on the label does not match that to be
used, the appliance must be converted and adapted to the desired type of gas.
For this operation proceed as follows:
CONVERSION FROM NATURAL GAS TO LPG
network.
1. Cut off electricity and gas supply.
2. Remove the casing from the frame and disconnect grounding cable.
3. Unscrew the B plug with the help of a n°19 wrench (see Figure 20).
4. With a socket wrench n°10 introduced in the opening, unscrew the A nozzle support
(see Figure 20).
5. Unscrew the gauged nozzle C from the nozzle support A and replace it (see Figure
20).
6. Retighten the assemble nozzle support and the burner nozzle.
7. Relocate the B plug.
8. Start up the unit and check the gas seal of the plug B.
9. Proceed to a new set as described in the paragraph 5.
10. Replace the ”NATURAL GAS ” label with ”LPG” one.
11. Connect the grounding cable and re- mount the casing.
MODEL 41 42 51 52
NATURAL GAS (G20) DIAMETER (mm)
PRINTED REFERENCE
1,75/1,80
054
1,85
055
2,10
056
2,30
057
LPG (G30-G31) DIAMETER (mm)
PRINTED REFERENCE
1,0/1,05
058
0,95/1,25
059
1,1/1,3
060
1,2/1,35
061
Table 4 – Nozzles for natural gas and LPG.

36
A
C
Figure 20 – Burner Abby detail; nozzle support detail and gauged nozzle
CONVERSION FROM LPG TO NATURAL GAS
network.
1. Cut off electricity and gas supply.
2. Removing the casing from the frame disconnect the grounding cable.
3. Unscrew B plug with the help of a n°19 wrench (see Figure 20).
4. With a socket wrench n°10 introduced in the opening, unscrew the nozzle support A
(see Figure 20).
5. Unscrew the gauged nozzle C from the nozzle support A and replace it (see Figure
20).
6. Retighten the assemble nozzle and the burner nozzle.
7. Relocate the B plug.
8. Start up the unit and check the gas seal of the plug B.
Proceed to a new set as described in the paragraph The gas valve adjustment must be performed
by qualified personnel. To this regard, ROBUR S.p.A. can dispose of a network of
Assistance Centres which can be reached through the point of sale, the local agent or by
calling directly the Customer Assistance of ROBUR S.p.A. (tel. +39 035/888111).
9. at page 31.
10. Replace the LPG label with the ”NATURAL GAS” one.
11. Connect the grounding cable and re mount the casing.
A B

37
5.5 SAFETY DEVICES
A) Isolation of electrical supply: the unit stop working and the gas valve closes.
When the electricity will be re connected the units will re start automatically.
B) Lack of gas or any other cause of the flame extinguishing: the unit will
automatically try to re start for 10 seconds, afterwards in case of lack of flame
ignition the control box will stop the units and the combustion air blower.
C) Overheating: if during the operation of the unit the fan stops working, or in case the
upper heated air outlet should obstruct, the safety thermostat will immediately cut off
the electricity supply to the valve, cutting off the gas flow to the burner. To restore
the working operations wait 10 minutes approximately in order to let the temperature
drop. Clear electric supply, remove the shell and reset the unit pressing the reset
key positioned on the safety thermostat inside the unit (see ref A of Figure 21 or
Figure 22). If a similar inconvenient should occur again in a short period, a service
qualified engineer should be contacted.
A
Figure 21 – Reset key safety thermostat in models 51, 52 and 42
A
Figure 22 – Reset key safety thermostat in model 41

38
5.6 IMPROPER OPERATING PROCEDURES
Before making any direct control on the unit, make sure that:
- There is a full electricity supply.
- There is a full gas supply
- The feeling pressure to the burner is within the tolerances given.
Only after all the above checks have been successfully carried out, a specific trouble
shooting could commence.
Before removing the casing to access to the electrical control box CUT OFF
POWER SUPPLY to the unit by means the bi- polar switch positioned on the upper
part of the unit, or remove the electrical plug.
CASE 1:
THE UNIT LOCKS OUT DURING THE FIRST PHASE OF START UP
A) The gas flow is not enough. Verify that all manual valves and gas taps are open. In
case the unit has not been used for a long time, it could be due to some air in the
pipes. Reset it 3, 4 times and the unit will restart.
B) The plug polarity is not correct: verify it. In case you use an external plug, remove it,
turn it 180° and plug in it.
C) The ignition electrode is broken or improperly installed: replace it or reposition it
properly.
D) The flame sensor is broken or improperly installed: replace it or reposition it
properly.
For a correct ignition the distance between the two ignition electrodes should be 3-5
mm.
E) One of the ignition electrode or the wire cable are in touch with the shell or any other
metallic part: verify it removing the shell.
F) Ignition components failure: replace it
CASE 2:
THE UNIT LOCKS OUT DURING OPERATION
A) The safety thermostat stopped the gas valve to avoid overheating caused by:
• Obstruction on the upper heated air outlet. Remove the obstruction
• Fan failure (models 42, 51 and 52); replace it.
B) Failure to the ventilation thermostat (models 42, 51 and 52). The ventilation
thermostat does not permit the fan to work properly; replace it.
C) Failure to the gas valve; replace the coil or the gas valve.
In case of gas valve replacement it is necessary, as requested by local norms, seal
the nozzle support with a conforming sealing to the norms (ideal for gas seal).
D) Bad connection of safety thermostat; check cables and connections.

39
5.7 CLEANING AND MAINTENANCE
The only maintenance activity required is a periodical and proper cleaning of the external
panel (to be carried out always when the unit is cold and without any solvent) and the
removing of dust that can remain on the heat exchanger and on the fan.
An annual maintenance service and cleaning of the unit is recommended, calling the
qualified Service Authorised Company. Regarding the periodical maintenance of the unit,
respect the local norms.
5.8 SERVICING
For all installation, start up and maintenance service contact qualified service engineers.
Before calling for servicing, please make sure that the manual as well as all the unit
technical data is available namely:
- product serial number
- unit model
- type of gas
- brief description of the installation

40
-

Sezione Accessori
41
SECTION 6 ACCESSORIES
TOWEL WARMER (Code O-SPP000)
Figure 23 – Warmer towel
FOOD WARMER (Code O-SPP001)
Figure 24 – Food warmer
This accessory permit to pre heat or
keep warm food, drinks or any other
object.
Practical accessory to apply on the front grid, to
dry quickly towels and linen. This accessory can
be easily removed after use.

42
STICK FRAGRANCE DIFFUSER (Code O-SPP002)
Simple and convenient, placed
in front of the outlet grid, it
emits in the air a pleasant
fragrance contained in its
suitable glass.
Figure 25 – Fragrance diffuser
UMBRELLA STAND (Code O-SPP003)
Practical and useful, this
accessory could be used as
a container for umbrellas,
and in the meantime it
keeps them dried thanks to
the heat grant by the case
of the gas convector in use.
Figure 26 – Umbrella stand

Robur is dedicated to dynamic progression
in research, development and promotion
of safe, environmentally-friendly, energy-efﬁciency products,
through the commitment and caring
of its employees and partners.
Robur Mission
Robur Spa
advanced heating
and cooling technologies
Via Parigi 4/6
24040 Verdellino/Zingonia (Bg) Italy
T +39 035 888111 F +39 035 4821334
www.robur.com export@robur.it
Codice:D-LBR553_09_MEDSVI_028_03/2009

Installation Manual for Calorio Gas Heaters

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