Robur E 42, E 72, E 52, E 43, E 32 Installation, Operation And Maintanance

INDEX

SECTION 1 GENERAL SECTION..................................................................................................2

1.1 GENERAL WARNINGS......................................................................................................2

1.2 OVERVIEW OF OPERATION OF THE APPLIANCE.........................................................3

1.3 TECHNICAL DATA ............................................................................................................5

1.4 DIMENSIONS.....................................................................................................................6

SECTION 2 FOR THE USER............................................................................................................7

2.1 SWITCHING THE APPLIANCE ON AND OFF ..................................................................7

2.2 MAINTENANCE..................................................................................................................8

2.3 ASSISTANCE.....................................................................................................................9

SECTION 3 FOR THE INSTALLATION TECHNICIAN............................................................10

3.1 BUILD CHARACTERISTICS..............................................................................................10

3.2 CONTROL AND SAFETY COMPONENTS........................................................................10

3.3 INSTALLATION ..................................................................................................................11

3.3.1 GENERAL NORMS FOR INSTALLATION OF THE APPLIANCE.....................................11

3.3.2 ELECTRICAL CONNECTIONS..........................................................................................12

3.3.3 SIZING AND INSTALLATION OF COMBUSTION AIR AND EXHAUST GAS PIPES.......14

3.3.4 WALL INSTALLATION .......................................................................................................18

3.3.5 PROCEDURE FOR CHECKING & ADJUSTING CALIBRATION OF THE

NOVAMIX VALVE SIT 822.................................................................................................19

3.3.6 GAS CHANGE....................................................................................................................21

3.3.7 FUNCTIONAL WIRING DIAGRAM.....................................................................................22

3.3.8 ASSEMBLY WIRING DIAGRAM........................................................................................23

3.3.9 WIRING DIAGRAMS FOR THE INSTALLATION OF SEVERAL HEATERS.....................24

3.4 SERVICE............................................................................................................................25

3.4.1 POSSIBLE OPERATING ANOMALIES.............................................................................. 25

26

3.5 LIST OF ACCESSORIES...................................................................................................27

3.5.1 CONTROL UNITS...............................................................................................................27

3.5.2 MOUNTING BRACKETS....................................................................................................28

3.5.3 OTHER ACCESSORIES....................................................................................................29

Please read the warnings contained in this manual; they give important instructions regarding safe
installation, operation and maintenance of the appliance. Keep this manual safe for all further
consultation.
The manufacturer may not be held responsible for any damage arising from improper, incorrect or
unreasonable use of the appliance.

NOTE

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EVOLUZIONE series natural gas/LPG heaters

1 GENERAL SECTION

1.1 GENERAL WARNINGS

This manual forms an integral and essential part of the product and must be delivered to the u s er as such.
This appliance must be used only for the purposes for which it has been expressly designed. All other uses

are considered inappropriate and therefore dangerous.
The manufacturer does not accept any contractual or extracontractual liability for damage caused by errors in

installation or use and in any case by failure to observe the instructions supplied by the manufacturer.
Do not obstruct the inlet vent of the fan or the outlet grille.
In the case of failure and/or poor operation of the appliance, deactivate it (disconnect the power supply and

close the gas valve), and refrain from any attempt to repair or intervene directly upon the appliance.
Contact only professionally qualified personnel.
Professionally qualified personnel means personnel that have specific technical expertise in the sector of

heating plant components for civil use. In any case the user may obtain all necessary information by

contacting ROBUR S.p.A.’s Customer Service Department (tel. [phone]).

Any product repairs must only be carried out by a Technical Assistance Centre authorised by the
manufacturer, and using only genuine parts.

Failure to observe the instructions above may compromise the safety of the appliance.
To guarantee the efficiency and correct operation of the appliance it is essential to have annual maintenance

carried out by professionally qualified personnel, observing the manufacturer’s instructions.
If the appliance is sold or transferred to a different owner, ensure that this manual accompanies the appliance

so that so that it may be consulted by the new owner and/or installation technician.

Have professionally qualified personnel check that:

• the electricity and gas supply network data correspond to the data on the plate

• the exhaust air duct and combustion air intake are functioning correctly

• combustion air is supplied and exhaust fumes are discharged correctly, in accordance with current

norms

• the fuel supply piping is correctly sealed internally and externally

• the rate of fuel supply is adjusted in accordance with the power demanded by the heater

• the appliance is supplied with the type of fuel for which it is designed

• the fuel supply pressure is within the ranges indicated on the data plate

• the fuel supply plant is sized for the flow required by the heater and that it is equipped with all the safety

and control devices required by current norms

Do not use gas pipes to earth electrical appliances.
Do not leave the heater connected to the power supply unnecessarily when it is not used for a long period of

time, and close the gas valve.

• do not use electrical switches, telephones or any other object or device that can cause sparks

• open doors and windows in order to create an air current to ventilate the room

• close the gas valves

• contact professionally qualified personnel for assistance

IF YOU SMELL GAS …

BEFORE STARTING THE APPLIANCE

Installation, Operation and Maintenance Manual– Ed.07/2005 3

EVOLUZIONE series natural gas/LPG heaters

1.2 OVERVIEW OF OPERATION OF THE APPLIANCE

The warm air heaters in the Evoluzione range are independent heating appliances of the sealed circuit and
forced draught type.

They have been designed to be installed inside the room to be heated.
They may be set up to run on natural gas (G20) and L.P.G. (G30/G31) (the appliance belongs to category

II

2H3B/P

in accordance with the EN 1020 norm).

The combustion circuit is sealed off from the environment to be heated and complies with the requirements of
norm EN 1020 for type C appliances: intake of combustion air and outlet of exhaust gases occur outside and
are ensured by the operation of a blower which is located in the combustion circuit. The appliances are
approved also as type B appliances for installations where combustion air intake is permitted directly from the
room to be heated.

The operation of the heater is controlled by an ambient thermostat (not supplied as standard). When the
thermostat is activated, the electronic control unit, after a pre-wash time of about 30 seconds, ignites the
burner.

An electrode detects when ignition has occurred. If there is no flame, the electronic control unit halts operation
of the appliance.

A green ON light located on the right-hand side of the appliance indicates that ignition of the burner has
occurred (see item 5, Figure 2).

The combustion products pass through the heat exchangers internally. The heat exchangers receive the
current of air produced by the helicoidal fan, thus introducing warm air into the room.

The direction of the airflow can be adjusted up or down and/or from side to side by applying on the inlet grille
the (optional) adjustable fins (see “List of accessories” on page 27).

The helicoidal fan starts automatically only when it receives the command from the ventilation thermostat, that
is, only when the exchangers are warm, in order to prevent cold air from being introduced into the room.
Likewise, it stops when the exchangers are cold.

If the heat exchangers should overheat, because of abnormal operation, a limit thermostat is fitted which, if
required, cuts off power to the gas valve, which in turn cuts off the flow of fuel and makes the burner switch off.

Resetting the limit thermostat is an operation for professionally qualified personnel only, which restores
operation of the appliance after having identified the cause of overheating.

Upstream from the burner, a blower ensures the correct air-gas mixture and the forced expulsion to the
outside of the exhaust fumes deriving from combustion.

If the inlet or exhaust pipes are obstructed, or if the blower is operating inefficiently, the differential “air-gas
valve” control system interrupts the flow of combustion air to the burner.

The diagram in Figure 1 summarises winter operation of the heater.
The heating output and ventilation of the Evoluzione warm air heater are modulating: they can be reduced by

approximately 20% (see “TECHNICAL DATA” on page 5).
Operation on reduced power and ventilation allow ambient temperature to be kept constant, reducing gas
consumption and further lowering noise emissions into the environment.
Operation with automatic or manual modulation depends on the type of control units chosen (for further
information, see the paragraph “Other accessories” on page 29).

In the summer period, it is possible to operate the fan only, producing a pleasant movement of indoor air (for
further information see Section “For the User”, paragraph entitled “Summer”).

NOTE

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EVOLUZIONE series natural gas/LPG heaters

Figure 1 – DIAGRAM FOR WINTER OPERATION

Ambient thermostat

closes contact

Blower switches on

After 30 seconds of pre-

wash the electronic

control unit opens the

valve: the green

operation light and the

blower switch on

The detector electrode

determines whether

there is a flame

The combustion

products pass through

the exchangers

internally

The blower ensures

that combustion

products are forcibly

expelled

The differential “air-

gas” valve control
system for combustion
air flow checks that the

blower is functioning

correctly

When the exchangers

are hot, the fan,

controlled by the

ventilation thermostat,

comes on

The flow of air

produced by the fan

strikes the exchangers

externally and is

heated

Have the exchangers

overheated?

The heater works until

the ambient

temperature is reached

The limit thermostat

interrupts the operation

of the burner

Identify cause of

stoppage and reset

heate

r

Arrest

YES

NO

NO

YES

Installation, Operation and Maintenance Manual– Ed.07/2005 5

EVOLUZIONE series natural gas/LPG heaters

1.3 TECHNICAL DATA

MODEL U.M. E 32 E 42 E 43 E 52 E 72

CATEGORY OF APPLIANCE II

2H3B/P

TYPE OF APPLIANCE C13 - C

33

- B

23

- C53 - C

63

GAS TYPE NATURAL GAS - L.P.G.
NOMINAL HEAT INPUT (AT Ist SPEED) kW 26 34.75 37.15 48.35 69
kcal/h 22360 29890 31950 41580 59340
NOMINAL HEAT OUTPUT (AT Ist SPEED) kW 24.2 32 34.2 44.5 62.8
kcal/h 20790 27520 29410 38270 54010
REDUCED HEAT INPUT (AT 2nd SPEED) kW 20.8 27.8 29.8 38.7 55.2
kcal/h 17900 23910 25630 33280 47470
REDUCED HEAT OUTPUT (AT 2nd SPEED) KW 19.35 25.6 27.4 35.6 50.25
kcal/h 16640 22020 23560 30610 43210
NOMINAL EFFICIENCY % 93 92 92 92 91
AIR FLOW RATE AT Ist SPEED 2300 2900 3400 4200 6000
AT 2nd SPEED

m

3

/h

1900 2500 2700 3400 5100
THERMAL HEAD AT Ist SPEED 31.2 32.5 29.4 31.0 31.0
AT 2nd SPEED

K

30.2 30.0 29.8 30.7 29.2
NOMINAL GAS CONSUMPTION NATURAL GAS m3/h 2.75 3.68 3.93 5.11 7.30
(15°C - 1013 mbar) L.P.G. G30 2.05 2.74 2.93 3.81 5.44
L.P.G. G31

kg/h

2.01 2.69 2.90 3.74 5.34
REDUCED GAS CONSUMPTION NATURAL GAS m3/h 2.20 2.94 3.15 4.09 5.84
(15°C - 1013 mbar) L.P.G. G30 1.64 2.19 2.34 3.05 4.35
L.P.G. G31

kg/h

1.61 2.15 2.30 2.99 4.28
FUEL SUPPLY PRESSURE NATURAL GAS 20
L.P.G. G30

30

L.P.G. G31

mbar

30
GAS INLET DIAMETER ” 3/4
PIPE DIAMETER INTAKE
EXHAUST

mm 80

ELECTRICITY SUPPLY VOLTAGE 230V - 50Hz
INSTALLED ELECTRICAL POWER W 250 300 350 420 800
FUSE A 4
AIR THROW AT 1st SPEED

(RESIDUAL SPEED >1m/s)

m 14 18 20 22 26

SOUND PRESSURE AT 6 m (Ist SPEED)
IN FREE-FIELD CONDITIONS

dB(A)

38

39

40

42

43
IN TYPICAL INSTALLATION dB(A) 48 51 52 56 57
SOUND PRESSURE AT 6 m (2nd SPEED)

IN TYPICAL INSTALLATION

dB(A)

45

46

47

51

54
WEIGHT kg 60 66 66 74 86

Table 1 – TECHNICAL DATA, EVOLUZIONE SERIES

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EVOLUZIONE series natural gas/LPG heaters

1.4 DIMENSIONS

1 EXHAUST OUTLET E32 E42/43 E52 E72
2 COMBUSTION AIR INTAKE A 474 591 709 944
3 POWER SUPPLY SOCKET B 755 872 990 1225
4 CONNECTION C 418 477 536 --
5 ON LIGHT D 460 520 520 460
6 PASSTHROUGH HOLE FOR

E 197 256 315 432

MANOMETER TUBE

Figure 2 – DIMENSIONS

835

165

535

400 15

615 220

5

SIDE VIEW

26

777

26

829

130

B

290

=

A

=

FRONT VIEW

472

238,5

= =

120

80 80

290

12

EE

TOP VIEW

400

15

155

142

146

441

465

4

3

6

REAR VIEW E 72

597

411

460

C

146

142

3

4

6

REAR VIEW E 32/42/43/52

D

465

411

597

Installation, Operation and Maintenance Manual– Ed.07/2005 7

EVOLUZIONE series natural gas/LPG heaters

2 FOR THE USER

2.1 SWITCHING THE APPLIANCE ON AND OFF

The first switching on of the appliance must be carried out by professionally qualified personnel.
Before starting the heater, have professionally qualified personnel check that:

• the data on the plate correspond to the data from the electricity and gas supply grids

• the calibration is compatible with the power of the heater

• the exhaust gas pipe is operating correctly

• the intake of combustion air and outlet of exhaust gases occur correctly in accordance with the

specifications of current legislation

WINTER

1. Set the index of the ambient thermostat to maximum.

2. Check that the gas valve is open.

3. Supply current to the appliance by closing the omnipolar switch (provided by the electrical installation
technician).

4. Set the summer/winter switch to the winter position (indicated by the snowflake symbol ).

5. After a pre-wash time of approximately 30 seconds, the gas electrovalve opens and the burner switches
on.

6. When a flame is present, the central control unit keeps the gas valve open.

7. If no flame is present, the central control unit arrests operation of the appliance, and the arrest light
illuminates on the reset button.

8. If point 7 applies, press the reset button.

9. If ignition is trouble-free, set the ambient thermostat index (not supplied as standard) to the value desired.

If the appliance is switched on after a long period of disuse, or the first time the appliance is switched on, it
may be necessary to repeat the operation several times, due to air being present in the gas pipes.

SWITCHING OFF

To switch off the appliance, set the ambient thermostat index to the minimum. The burner will switch off, while
the fans will continue to operate until the appliance has fully cooled.

If the appliance is not used for a protracted period, after the operation described above and after waiting for
the fans to cease operating, close the gas valve and cut off electrical current to the appliance via the
omnipolar switch located on the power supply line.

In no circumstances must the appliance be switched off by removing the power supply from it directly. This
can damage the appliance, as it causes the fans to stop immediately and the limit thermostat to be activated,
which must be reset manually.

WARNING

WARNING

WARNING

WARNING

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EVOLUZIONE series natural gas/LPG heaters

SUMMER

1. Close the gas valve and check that electrical current reaches the appliance.

2. Set the summer/winter switch to the summer position (indicated by the sun symbol ); set thus, only the
fans will operate.

SEASONAL ARREST

1. Switch off the appliance and wait for the fans to stop.

2. Close the gas valve upstream of the appliance.

3. If the SUMMER function is not to be used, remove electrical power from the appliance by means of the
omnipolar switch located on the power line.

RESET OF THE LIMIT THERMOSTAT

The limit thermostat stops the burner if the appliance
becomes too hot. Reset is carried out by pressing the
button on the rear of the appliance, after having removed
the protective cap (see Figure 3). Replace the protective
cap after resetting the thermostat.

Figure 3 – LIMIT THERMOSTAT RESET BUTTON POSITION

Activation of the limit thermostat ALWAYS indicates an abnormal condition.
For this reason, reset of the limit thermostat is a task for professionally qualified personnel, who will restore
operation of the appliance ONLY after identifying the cause of overheating.

2.2 MAINTENANCE

Careful maintenance is always at the basis of economy and safety.
The maintenance of heating plants must be carried out on an annual basis, preferably at the beginning of the

winter season, by professionally qualified personnel.
For prolonged, trouble-free operation, we recommend a general cleaning of the appliance (paying particular

attention to the heat exchangers and the fan grilles) and carrying out combustion tests in accordance with
specific regulations.

WARNING

RESET BUTTON

LIMIT THERMOSTAT

Installation, Operation and Maintenance Manual– Ed.07/2005 9

EVOLUZIONE series natural gas/LPG heaters

2.3 ASSISTANCE

Always entrust

professionally qualified personnel with all reinstallation, activation, maintenance, gas

change, and other operations

.

For this reason, ROBUR S.p.A. has a network of Technical Assistance Centres that can be contacted via the
dealer, the area representative, or by calling ROBUR S.p.A.'s Customer Assistance directly on 035/888111.

Before calling Customer Assistance, make sure that you have the machine documentation to hand and, if
possible:

- the registration number and model of the product, which may be found on the data plate and on the
guarantee card

- a description - even if only brief - of the type of installation

WARNING

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EVOLUZIONE series natural gas/LPG heaters

A

C

B

3 FOR THE INSTALLATION TECHNICIAN

3.1 BUILD CHARACTERISTICS

- premixed burner in stainless steel

- high head blower

- cylindrical combustion chamber in stainless steel

- ROBUR-patented

heat exchanger, manufactured in special light alloy, with horizontal fins on the air side

and vertical fins on the exhaust gas side, with extremely high heat exchange capacity

-

external panelling manufactured in painted steel and anodised aluminium

- two-speed

axial fan

The Evoluzione heater is manufactured in compliance with the norms currently in force as applied to gas
appliances and electromagnetic emissions.

3.2 CONTROL AND SAFETY COMPONENTS

- manually resettable 100°C limit thermostat, providing protection against overheating of the heat
exchangers.

-

differential “air-gas valve” control system for combustion airflow. If the air intake or exhaust outlet

pipes are obstructed, this safety system is activated, bringing about the arrest of the appliance.

-

Gas electrovalve: if a safety device is activated (limit thermostat, central control unit, etc.) the gas valve

is de-energised electrically, with the consequent interruption of gas flow to the burner.

•

Power supply: 230 V - 50 Hz

•

Operating temperature range: 0°C to +60°C

-

central ignition and flame control unit which takes care of the operation of igniting the premixed burner

and detecting the flame; if a flame is not detected within the safety time, the electronic control unit arrests
the machine, which must be restarted manually.

•

Safety time: 5 seconds

•

Pre-wash time: 30 seconds

•

Power supply: 230 V - 50 Hz

Figure 4

A) central flame control unit
B) transformer
C) relay

Installation, Operation and Maintenance Manual– Ed.07/2005 11

EVOLUZIONE series natural gas/LPG heaters

3.3 INSTALLATION

3.3.1 GENERAL NORMS FOR INSTALLATION OF THE APPLIANCE

• Installation must be carried out be professionally qualified personnel, following the manufacturer’s

instructions.

• Professionally qualified personnel means personnel that have specific technical expertise in the sector of

components of heating plants. In any case you may obtain any information that you may require by
calling ROBUR S.p.A.’s Pre-sales Office on 035/888111.

• Erroneous installation may cause damage to persons, animals or things. The manufacturer may not be

held responsible for such damage.

• Installation must be carried out in compliance with current national and local norms.

For installation purposes, the following regulations should be respected:

- The minimum distance of the appliance from the wall behind it should be enough to allow adequate air
renewal (at least 350 mm). The minimum distance from the side walls is indicated in Figu re 5.

- The optimum height recommended from the ground to the base of the heater is 2.5 – 3.5 m (see Figure 5).
The heater must NOT be installed at heights of less than 1.8 m from the ground (for models E 32 and E

42), or 2.5 m (for models E 43, E 52 and E 72).

- To obtain maximum comfort and performance from the plant, we recommend that the following rules are
observed:

• make sure that the flow of air from the appliance does not strike workers directly

• take into account the presence of obstacles (pillars and suchlike).

• for better heat distribution, if several machines are installed, create alternating flows of warm air (see

Figure 6).

• in such cases it may also be a good idea to position the appliances near main doors so that they

perform the additional function of creating an “air barrier” at the moment these doors are opened.

- Do not install Evoluzione series heaters in greenhouses or environments with a high degree of humidity or
other such climatic conditions, as they have not been designed for this type of use.

On the basis of the installation plan, set up the gas and electricity supply lines, as well as the holes for exhaust
gas outlet and combustion air intake (together with the mounting brackets, ROBUR supplies an “installation
template” on which the layout of the holes has been reproduced).
A) Unpack the appliance, taking care to check that it has not been damaged during transport; each appliance

is tested in the factory before being dispatched. Therefore, damage has occurred, tell the transporter
immediately.

B) Fit the mounting brackets, chosen from the three available types (for further information see the paragraph

entitled “Wall installation” on page 18), following the instructions supplied with the accessory.

C) Fix the heater to the bracket, using the screws supplied with the bracket.
D) On the gas supply pipe, provide a gas shut-off valve and a three-piece joint.
E) Check that an adequate gas distribution network exists. In particu lar, if the appliance is fuelle d by:

Natural gas

Make sure that the gas supply pressure from the distribution network, when the appliance is in operation,
is set to the value of 20 mbar (204 mm H

2

O) (with a tolerance from 17 mbar to 25 mbar).

L.P.G. (Propane-Butane mix)

It is essential to fit a first-stage pressure reducer in proximity to the liquid gas tank to reduce pressure to

1.5 bar, and a second-stage pressure reducer for a further reduction from 1.5 bar to 30 mbar (306 mm
H

2

O) in proximity to the heater (with a tolerance from 20 mbar to 35 mbar).

L.P.G. (pure Propane)

It is essential to fit a first-stage pressure reducer in proximity to the liquid gas tank to reduce pressure to

1.5 bar, and a second-stage pressure reducer for a further reduction from 1.5 bar to 30 mbar (306 mm
H

2

O) in proximity to the heater (with a tolerance from 25 mbar to 35 mbar).

WARNINGS

12 Installation, Operation and Maintenance Manual - Ed.07/2005

EVOLUZIONE series natural gas/LPG heaters

If you are not sure what composition of L.P.G. is used, assume that it is a Propane-Butane mix and act
accordingly.

3.3.2 ELECTRICAL CONNECTIONS

A) Connect the appliance electrically using the socket supplied as standard and a type H05 VVF 3x1.5 mm

2

cable, with a maximum external diameter of 8.4 mm.

For this operation, ensure that:

- power grid data corresponds to the data on the machine data plate (230 V/50 Hz single phase).

- when the connection is made, the ground wire is kept longer than the live wire, so that it will be the last
cable to be pulled out if the power supply cable is accidentally pulled out, thus ensuring that it remains
grounded.

Electrical safety of the appliance is achieved only when it is correctly connected to an efficiently grounding
system, created in accordance with current safety legislation. Do not use gas pipes to ground electrical
equipment.

B) Provide a bipolar switch on the power supply line with minimum contact clearance of 3 mm.

“Bipolar”

means that it may be opened on both phase and neutral

. This means that when it is opened, both contacts

are open.

C) The installation of an ambient thermostat

is obligatory, whenever the control used does not provide it.

The thermostat must be connected to the appliance as shown in the electrical assembly diagram (see
Figure 22 on page 23). We recommend that the thermostat (or its sensor) is positioned approximately 1.5
m from the floor, away from draughts or direct sunlight and other direct heating sources (lights, warm flows
of air from the appliance itself, etc.) and, if possible,

NOT on outside-facing walls, so as not to give false

temperature readings and therefore compromise operation of the plant.

IN THIS WAY, UNDESIRED
SWITCHING ON AND OFF OF THE PLANT WILL BE AVOIDED AND OPTIMAL COMFORT WILL E
ENSURED IN THE ROOM.

In addition to the ambient thermostat it is necessary to install one of the control units that ROBUR supplies

as optional accessories (for further information, see the paragraph entitled “List of accessories” on page

27.)

Control cables (in particular those connected to the control units and temperature sensors) must be

protected from interference created by power cables.

Such protection may be obtained, for example,

either by shielding the cables or by laying them in separate channels from the power cables.

D) If it is not intended to use one of these accessories, it is nonetheless necessary to install, as well as the

thermostat

:

- 1 switch to control summer/winter operation of the heater, to connect to poles 1, 2 and 3 of the

terminal board (see electrical assembly diagram on page 23)

- 1 switch to control operation at maximum and reduced power, to connect to poles 8 and 3 of the

terminal board (see electrical assembly diagram on page 23)

- 1 illuminated switch to signal arrest of the heater, to connect to poles 5, 6 & 7 of the terminal board

(see electrical assembly diagram on page 23)

NOTE

NOTE

NOTE

Installation, Operation and Maintenance Manual– Ed.07/2005 13

EVOLUZIONE series natural gas/LPG heaters

Figure 5 – CLEARANCES

Figure 6 – EXAMPLES OF INSTALLATION

minimum 400 mm

350 mm

minimum:
E32 – E42: 1.8 m
E43 – E52 – E72: 2.5 m
maximum: 3.5 m

min

200

A

A

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EVOLUZIONE series natural gas/LPG heaters

3.3.3 SIZING AND INSTALLATI ON OF COMBUSTION AIR AND EXHAUST GAS PIPES

The Evoluzione series of warm air heaters may be installed in one of the following ways:

- type

B

23

installation: in this type, combustion air intake occurs inside the room, while exhaust gas outlet
takes place outside, via a special pipe, that may be either horizontal or vertical. In this type of installation,
the appliance is not sealed off from the room (see Figure 7 and Figure 8)

- type

C

13

and C

33

installation: the outlet of exhaust gases and intake of combustion air occur outside,

through coaxial or separate pipes, on a wall (for C

13

see Figure 9 or Figure 10) or on the roof (for C

33

see

Figure 11). In this way the appliance is sealed from the room in which it is installed.

- type

C

53

installation: the outlet of combustion products and combustion air intake occur through separate
pipes that exit on the outside of the building, on different walls. This type allows wall-based air intake and
exhaust gas outlet far from the appliance, or via the roof (see Figure 12).

- type

C

63

installation: with this type, exhaust outlet/air intake systems can be created using commercially
available tubes, bends and terminals, on condition that they are approved for this type of appliance. In
addition, pipes with a diameter of more than 80 mm can be used: for example when it is necessary to
create air/exhaust systems of considerable length. With this type, for the calculation of the air/exhaust
system, reference should be made to the data supplied by the pipe manufacturer, as well as to the
composition, flow rate and temperature of the exhaust gases (see Table 2).

In any case, use approved pipes according to the type of installation that is to be carried out. ROBUR S.p.A.
can supply to order rigid pipes, coaxial pipes and approved terminals.

In order to size the pipe system, it is necessary to calculate the total pressure drop generated by the system
itself.

The maximum and minimum admissible total pressure drop depend on the model of appliance (see Table 2).
Table 3 gives the pressure drops, for Ø 80 and Ø 100, for the air pipes and coaxial pipes su ppl ied by ROBUR.
The pressure drops of the external terminals, being extremely small, can be disregarded.
In the design stage, it is necessary to verify that the sum of the pressure drops of the pipe system is higher

than the minimum admissible pressure drop and that it is lower that the maximum admissible pressure drop of
the appliance (see Table 2). The following pages give an example of how to calculate pressure drops.

The maximum lengths of the air pipe and the exhaust gas pipe, in relation to the type of installation carried out,
are given in Table 4. The lengths should be taken as APPROXIMATE, and in the case of standard installations
in which the air pipe and the exhaust gas pipe are routed in a linear fashion as shown in Figure 7, Figure 8,
Figure 9, Figure 10, Figure 11 and Figure 12.

It is ALWAYS necessary to install a condensate separator (see detail D in Figure 8), available as an
accessory (Code O-SCN000).

In the case of installations with horizontal pipes of more than 1 metre in length, in order to prevent drops of
condensate reaching the appliance, it is necessary to install the exhaust gas pipe with a counterslope of 1 or
2 cm for each metre of length.
In addition, for the correct installation of external terminals for outlet of combustion products and intake of
combustion air, follow the indications given in Figure 13.

If the integrated upper mounting bracket is not used, to make connection of the heater and the air/exhaust
gas pipes easier, ROBUR supplies as an accessory an “air/exhaust gas pipe connector kit” (Code O­SCR010) that includes 2 adaptors Ø 80 with element for drawing exhaust gases/air (see detail C of Figure 8)
and gasket.

NOTE

NOTE

NOTE

Installation, Operation and Maintenance Manual– Ed.07/2005 15

EVOLUZIONE series natural gas/LPG heaters

Figure 7 – TYPE B23 INSTALLATION WITH WALL-BASED EXHAUST

OUTLET

Figure 8 - TYPE B23 INSTALLATION WITH ROOF-BASED EXHAUST

OUTLET

DATA FOR CALCULATION OF AIR/EXHAUST GAS SYSTEM WITH COMMERCIALLY AVAILABLE PIPES

CO2 CONTENT IN EXHAUST GASES %

ADMISSIBLE PRESSURE

DROP

MOD.

TEMPERATURE

EXHAUST GASES

°C

FLOW RATE OF

EXHAUST GASES

IN MASS

kg/h

NATURAL GAS LPG

MIN (Pa) MAX (Pa)

E 32 150 43.3 5 30
E 42 170 57.5 7 40
E 43 170 62.5 8 40
E 52 170 79.1 10 50
E 72 175 116.2

9.0 9.5

10 80

Table 2

DATA FOR CALCULATION OF AIR/EXHAUST GAS SYSTEM WITH PIPES Ø 80 OR Ø 100 SUPPLIED BY ROBUR ON RE QUEST

PRESSURE DROP FOR COMPONENTS Ø 80 PRESSURE DROP FOR COMPONENTS Ø 100

PIPE

(Pa/m)

90°BEND

(Pa)

COAXIAL

(Pa)

PIPE

(Pa/m)

90°BEND

(Pa)

MOD.

EXH. AIR EXH. AIR WALL ROOF EXH. AIR EXH. AIR

COAXIAL

ROOF (Pa)

E 32 0.70 0.36 1.05 0.54 2.5 4.4 0.26 0.10 0.39 0.15 3.1
E 42 1.20 0.60 1.80 0.90 4.2 12.3 0.40 0.20 0.60 0.30 7.9
E 43 1.39 0.74 2.08 1.11 4.9 14.6 0.45 0.27 0.67 0.40 10.1
E 52 2.26 1.16 3.39 1.74 9.7 25.6 0.76 0.40 1.14 0.60 16.9
E 72 4.95 2.54 7.42 3.81 13.5 48.7 1.66 0.86 2.50 1.30 31.9

Table 3

A Adaptor Ø 80
B Condensate separator
C 90° bend Ø 80
D Pipe Ø 80
E Lower mounting bracket

A

B

B

D

C

E

A Roof exhaust terminal
B Pipe Ø 80
C Adaptor Ø 80
D Condensate separator
E Upper mounting bracket

E

A

B

C

D

16 Installation, Operation and Maintenance Manual - Ed.07/2005

EVOLUZIONE series natural gas/LPG heaters

For each “T”-shaped element, consider an increase in length of 2 metres.
For each 45° bend, calculate an increase in length of 0.75 metres.

APPROXIMATE MAXIMUM LENGTHS ALLOWED FOR EACH TYPE OF INSTALLATION

TYPE OF INSTALLATION

B 23 C 13 C 33 C 53

COAXIAL ROOF

PIPE Ø 80

COAXIAL

WALL

Ø 80

Ø 80 Ø 100

HORIZONTAL VERTICAL

SEPARATE

PIPES

Ø 80

PIPES Ø 80 PIPES Ø 80 PIPES Ø 80 PIPES Ø 100

SEPARATE

PIPES

Ø 80

MOD.

EXHAUST GAS EXHAUST GAS AIR/EXH. AIR/EXH. AIR/EXH. AIR/EXH. AIR/EXH. AIR/EXH.

E 32 20 20 16+16 14+14 13+13 15+15 20+20 1+15

E 42 20 20 14+14 13+13 12+12 14+14 20+20 1+15
E 43 20 20 13+13 12+12 10+10 12+12 20+20 1+15
E 52 20 20 10+10 8+8 7+7 9+9 15+15 1+15
E 72 15 15 7+7 7+7 4+4 6+6 15+15 1+10

Table 4

If your installation does not correspond with the figures given in Table 4 above (e.g. type C13 installation of
an E 52 with air pipe diameter Ø 80 length 10 m and exhaust gas pipe diameter Ø 80 length 16 m), it is
necessary to calculate the pressure drop of the pipe system and verify that the sum is not greater than the
admissible pressure drop, or alternatively to contact ROBUR’s Pre-sales service on 035/888111.

CALCULATION – AN EXAMPLE

Let us hypothesise that we are installing an E 43 heater. The air/exhaust gas system will be created from
separate pipes, Ø 80, in the following way:

- 20 metres of exhaust gas pipe Ø 80

- Four 90

° bends, Ø 80, on the exhaust gas pipe

- 8 metres of air pipes, Ø 80
It is now possible to proceed with a test calculation, remembering that the minimum admissible pressure drop

is 8 Pa while the maximum admissible pressure drop is 40 Pa (see Table 2).

Quantity

Pressure drop

Exhaust gas pipe Ø 80 20 m x 1.39 Pa = 27.8 Pa +
90

° bends on exhaust gas pipe

4 x 2.08 Pa = 8.32 Pa +

Air pipe Ø 80 8 m x 0.74 Pa = 5.92 Pa =

Total pressure drop

42.04 Pa

The total pressure drop of the pipe system is higher than the maximum admissible pressure drop
(42.04 Pa, HIGHER than 40 Pa). Therefore, the installation IS NOT PERMITTED.

Installation will be possible if one of the following measures is adopted:

- reducing the length of the air/exhaust gas pipes;

- reducing the number of bends in the exhaust gas pipe;

- increasing the diameter of the pipes to 100mm

NOTE

NOTE

Installation, Operation and Maintenance Manual– Ed.07/2005 17

EVOLUZIONE series natural gas/LPG heaters

Figure 9 – TYPE C13 INSTALLATION WITH SEPARATE WALL-

MOUNTED PIPES

Figure 10 – TYPE C13 INSTALLATION WITH WALL-MOUNTED

COAXIAL PIPES

Figure 11 – TYPE C53 INSTALLATION WITH ROOF-MOUNTED

COAXIAL PIPE

Figure 12 – TYPE C53 INSTALLATION WITH ROOF-MOUNTED

EXHAUST GAS OUTLET AND WALL-MOUNTED AIR INTAKE

A

B

A Wall-based terminal
B Integrated upper mounting

bracket with separate wall­mounted air intake and
exhaust

g

as outlet

A Wall-mounted

coaxial pipe

Ø 150
B 90° bend Ø 80
C Adaptor Ø 80

D Lower mounting

bracket
E Condensate

separator

A Roof-mounted coaxial

exhaust gas outlet
B Pipe Ø 80
C Adaptor Ø 80
D Lower mounting bracket

A Roof-mounted

terminal
B Pipe Ø 80
C 90° bend Ø 80
D Adaptor Ø 80
E Upper mounting

bracket
F Wall-mounted

terminal
G Condensate

separator

A

B

C

D

E

G

F

B

D

C

E

B

A

A

B

E
C

D

18 Installation, Operation and Maintenance Manual - Ed.07/2005

EVOLUZIONE series natural gas/LPG heaters

Figure 13 – POSITIONS OF WALL-MOUNTED TERMINAL

3.3.4 WALL INSTALLATION

For the installation of its Evoluzione heaters, ROBUR S.p.A. supplies various types of mounting brackets (as
optional extras) from which to choose according to the type of exhaust outlet to be created. In particular:

- upper mounting bracket. This supports the heater from above, and is supplied complete with condensate
drain and air/exhaust gas pipe connection kit with elements for drawing air/exhaust ga s (see Figure 31).

- upper mounting bracket with integrated wall-mounted outlets (see Figure 32). This bracket performs two
functions: supporting the heater from above, and intake and outlet of combustion products. It is supplied
complete with an external dual wind-protected terminal.

- Adjustable lower mounting bracket. This supports the heater from below and allows it to adjusted by ± 30°

in relation to the wall used for installation; it is supplied complete with condensate drain and air/exhaust gas
pipe connection kit with elements for drawing air/exhaust gas (see Figure 33).

- tubular support bracket. This supports the heater from below, and is supplied complete condensate drain
and air/exhaust gas pipe connection kit with elements for drawing air/exhaust gas (see Figure 34).

If it is not intended to use these accessories, refer to the diagram below. As regards fixing the appliance to the
support shelf, fix the latter with 4 M10 bolts.

Figure 14

1 = EXHAUST GAS OUTLET
2 = COMBUSTION AIR INTAKE

290

FRONT VIEW

POSITION
RECOMMENDED

2

1

POSITION
ALLOWED

2

1

POSITION NOT
ALLOWED

2

1

25

790

400

Installation, Operation and Maintenance Manual– Ed.07/2005 19

EVOLUZIONE series natural gas/LPG heaters

3.3.5 PROCEDURE FOR CHECKING & ADJUSTING CALIBRATION OF THE NOVAMIX VALVE SIT 822

These operations must be carried out by qualified personnel. Wrong or careless assembly or fitting of the
gas circuit can cause dangerous gas leaks and in particular in areas that are tampered with. Use, too,
adequate sealants on all connections.

Each heater is tested and approved in the factory for operation with G20 natural gas.
The calibration of the valve must be carried out

ONLY if the gas valve is replaced.

After calibration is completed, the valve’s adjusting screws, A and B, must be sealed. After calibration, check
the sealing of the screws of the pressure intakes with soapy water or other suitable means.

A) Completely unscrew the air/gas ratio adjustment screw A (Figure 15), turning it anticlo ckwise.
B) Tighten screw B (Figure 15) until flush, turning it clockwise.
C) Connect a differential manometer, with a resolution of at least 5 Pascal, in the following way:

- the positive connector (+) to the blower gas pressure intake D (Figure 15) on the gas valve;

- The negative connector (-) in parallel to the silicon tube that connects the blower (connector “G”,
Figure 18) to the open valve signal input F (this operation is made possible by inserting a “T”
connector between the silicon tube and the input (connector “F”) to the valve as indicated in Figure 1 7.

D) Start the heater and select minimum operating power.
E) Check that the difference in pressure read on the differential manometer corresponds to the OFFSET

value (pressure at the burner – pressure at the blower) indicated in Table 5.

F) If the OFFSET value detected is more than +/- 0,1 mbar off of the valued indicated in Table 5, adjust the

valve by turning OFFSET adjustment screw C.

If the readout of the differential manometer is not sufficiently stable to carry out a correct calibration of the
offset, we suggest inserting a damping nozzle (ROBUR optional accessory Code B-GLL103) in the silicone
tube connected to the positive connector (pressure at the burner).

G) Switch operation of the heater to maximum power and check that the offset value does not change from

that indicated at minimum power (tolerance +/- 0.1 mbar).
H) Visually check that the burner does not show signs of reddening at either minimum or maximum power.
I) Switch the heater off and on, and check the offset calibration again at minimum and maximum power.
J) Switch off the heater, disconnect the differential manometer from the valve’s gas pressure intake “F” and

the burner’s “G”, restore the connection of the silicone tube to the gas valve’s connector “F” and tighten

until flush screw “D” (Figure 15) of the gas pressure intake.

Figure 15 – Novamix SIT 822 gas valve

WARNING

WARNING

A) Air-gas ratio adjustment screw
B) Pilot gas flow adjustment screw
C) OFFSET adjustment screw
D) Burner pressure intake
E) Pressure intake at valve entrance

20 Installation, Operation and Maintenance Manual - Ed.07/2005

EVOLUZIONE series natural gas/LPG heaters

Figure 16 – Novamix SIT 822 gas valve

Figure 17

OFFSET VALUES

MODEL E 32 E 42 E 43 E 52 E 72
OFFSET [mbar] 0 0 -0,3 0 0

Table 5 – OFFSET VALUES

F) Valve opening signal input

F

Offset adjustment
screw (C)

Pressure on
blower signal
input (G)

Blower

Gas pipe

Gas valve

Signal input
(E)

T connector

Open valve
command
signal tube

Burner pressure intake (D)

Gas intake

Differential
manometer

OFFSET=burner
pressure minus
blower pressure

Installation, Operation and Maintenance Manual– Ed.07/2005 21

EVOLUZIONE series natural gas/LPG heaters

3.3.6 GAS CHANGE

These operations must be carried out by professionally qualified personnel. Wrong or careless fitting and
installation of the gas circuit may cause dangerous gas leaks in the whole circuit and in particular in areas
that are tampered with. In addition, adequate sealants must be used on all connections.

If the type of gas indicated on the label does not correspond to that which is to be used, the appliance must be
converted and adapted to the type of gas that is going to be used.

To carry out this operation, proceed as follows:
A) Remove both the gas and electricity supply.

B) Unscrew the hexagonal nut that connects the gas pipe to the connector of the nozzle base (Figure 18).

Take care not to lose or damage the round internal seal.

Figure 18 – USCITA DEL SEGNALE DI PRESSIONE GENERATO

DAL SOFFIATORE

Figure 19

C) Loosen, without removing, the 4 screws that fix

the gas supply pipe to the valve (Figure 19).

D) Move the gas pipe and extract the nozzle, with

the help of a screwdriver for leverage if
necessary (see Figure 20).

E) Remove the o-ring seal from the nozzle and fit

it to the new nozzle.
For the type of nozzle suitable for the model of

heater refer to Table 6.

F) Insert the new nozzle in its seating.

Figure 20

G) Refit the gas pipe, checking that the round seal in the metal nut and the square seal on the valve exit are

firmly in place. Tighten the nut to a locking torque of 62±2 Nm; tighten the valve screws and carry out

calibration checks.
H) Calibrate the appliance for the new gas type; adjusting the pressure to the burner as described in the

previous paragraph “Checking and adjusting operating gas pressure”.
I) While the appliance is in operation, check the sealing of all gas connections with soapy water or by

another suitable means, including those that have not been handled during the operation.
J) Replace the sticker indicating the type of gas applied on the appliance with one indicating the new type of

gas.

NATURAL GAS AND L.P.G. NOZZLES

E 32 E 42 E 43 E 52 E 72
Natural gas (G20) diameter (mm)

stamped code

4.60
108

5.50
119

5.90
074

7.20
120

10.3
121

LPG diameter (mm)
stamped code

3.50
117

4.25
122

4.50
123

5.40
073

7.50
124

Table 6

WARNING

G

O-RING

NOZZLE

EXIT OF PRESSURE SIGNAL GENERATED BY
BLOWER

22 Installation, Operation and Maintenance Manual - Ed.07/2005

EVOLUZIONE series natural gas/LPG heaters

3.3.7 FUNCTIONAL WIRING DIAGRAM

Figure 21 – FUNCTIONAL WIRING DIAGRAM

1234567 89

10 11 12 13 14 J5 J616 17 18 19

~

230V 50Hz

L

M9

Z1

Z9

M1

M4

TR

RP8

Q1

S

P1

L1

GND

N

M2

J1 J2 J3 J4

CVCV VV

RLRL-1 RL-2

CR

Q2

MIN

M

A

X

M

I

N

MAX

MIN MAX

LMP

RP7

Z2

~

~

M9

Mains fuse - 5x20 4 A F

M2 Fan thermostat

Z1 Summer/winter switch (optional)

Z9

Ambient thermostat (optional)

M1

Limit thermostat

M4 Flame control equipment

L1 Arrest light (optional)
P1 Restart button (optional)

CV Fan condenser (2 pcs for E72)

V

Fan motor 2 pcs for E72)

CR Condenser speed reduction blower

Z2

MAX/MIN switch (optional)

S Blower motor

TR Ignition transformer

RP7 Ignition electrode (2 pcs)

RP8 Flame detection electrode

Q1 Safety gas electrobvalve

L Power – phase

N Power – Neutral

GND Power – Ground

RL Relay + base

Q2 Modulating gas electrovalve

LMP Ignition light

SP

Panel plug (see Figure 25)

Installation, Operation and Maintenance Manual– Ed.07/2005 23

EVOLUZIONE series natural gas/LPG heaters

3.3.8 ASSEMBLY WIRING DIAGRAM

Figure 22 – ASSEMBLY WIRING DIAGRAM (SEE KEY TO Figure 21)

24 Installation, Operation and Maintenance Manual - Ed.07/2005

EVOLUZIONE series natural gas/LPG heaters

3.3.9 WIRING DIAGRAMS FOR THE INSTALLATION OF SEVERAL HEATERS

ROBUR has control units for the control and management of several heaters (see “List of accessories” on
page 27). If these controls are not used, follow the diagrams below.

In these conditions, power and ventilation modulation will not occur.

Figure 23 – WIRING DIAGRAM FOR OPERATION OF SEVERAL HEATERS WITH A SINGLE TIMER AND SEVERAL THERMOSTATS

Figure 24 – WIRING DIAGRAM FOR OPERATION OF SEVERAL HEATERS WITH A SINGLE TIMER AND A SINGLE AMBIENT THERMOSTAT

(solution with several relays)

NOTE

HEATER HEATER HEATER

RL1 RL2 RL3

P

L N L N L N

Z9 Z9 Z9

TA TA TA

N
L

I

230 V - 50 Hz

P = PROGRAMMABLE TIMER
TA = AMBIENT THERMOSTAT
RL1-2-3 = PROGRAMMED

CONTROL RELAY

HEATER HEATER HEATER

RL1 RL2 RL3

P

L N L N L N

Z9 Z9 Z9

N
L

I

230 V - 50 Hz

P = PROGRAMMABLE TIMER
TA = AMBIENT THERMOSTAT
RL1-2-3 = PROGRAMMED

CONTROL RELAY

TA

Installation, Operation and Maintenance Manual– Ed.07/2005 25

EVOLUZIONE series natural gas/LPG heaters

Figure 25 – WIRING DIAGRAM FOR OPERATION OF SEVERAL HEATERS WITH A SINGLE PROGRAMMABLE TIMER AND A SINGLE AMBIENT

THERMOSTAT (solution with single relay)

3.4 SERVICE

All maintenance and service operations must be carried out by an

Authorised Service Centre.

3.4.1 POSSIBLE OPERATING ANOMALIES

Before performing specific checks, make sure that:
A) The appliance is powered (230 V ± 10% 50 Hz) and that it has an adequate gro unding system.
B) There is a supply of gas.
C) Pressures and flows fall within the limits specified by the manufacturer. A lower pressure reading than that

indicated by the manufacturer corresponds to insufficient gas supply. The causes may be:
If the appliance runs on natural gas:

• Inadequate meter

•

excessive length and/or number of bends in the gas piping for the diameter used

If the appliance runs on L.P.G.:

• it may happen that after initial switch-off of the burner, upon switching on again, the appliance fails to

start. In this case it is possible that the reducer has insufficient flow capacity

•

if the indicated pressure is not reached it is possible that the pressure reducer on the tank does not

have sufficient flow capacity, or that the length and/or number of bends in the gas piping are excessive
in relation to the diameter used

Only at this point should you proceed with checking for the specific failure.

Before opening the door on the side of the appliance to gain access to the electrical panel, REMOVE
ELECTRICAL POWER from the appliance using the omnipolar switch located upstream of the appliance or
by disconnecting the power plug.

NOTE

NOTE

HEATER HEATER HEATER

P

L N L N L N

Z9 Z9 Z9

N
L

I

230 V - 50 Hz

P = PROGRAMMABLE TIMER
TA = AMBIENT THERMOSTAT
RL = PROGRAMMED

CONTROL RELAY

TA

RL

26 Installation, Operation and Maintenance Manual - Ed.07/2005

EVOLUZIONE series natural gas/LPG heaters

3.4.2 TYPES OF FAILURE AND POSSIBLE COURSES OF ACTION

In case of failure contact your local Authorised Service Centre.

Case 1: The appliance fails to start during ignition phase

A) The correct phase connection has not been respected.
B) The ignition electrodes are broken or incorrectly positioned.
C) The flame detector electrode is broken, incorrectly positioned, or is touching the earth of the equipment.
D) Damage to the ignition transformer or to its electrical connections.
E) Damage to the gas valve or to its electrical connections.
F) Inefficient grounding system.
G) Air present in the gas piping.
H) Incorrect calibration of gas pressure to burner.

Case 2: Arrest of the appliance during operation

A) Gas not supplied due to damage to gas plant; the central control unit repeats the ignition cycle, after which

it closes the gas valve, thereby arresting the appliance (accidental interruption to gas supply).

B) Electrical power not received due to damage to the external electricity supply system; if electrical power is

absent for a prolonged period, the limit thermostat (M1) is activated, arresting the machine and preventing
it from being switched on again. Wn power returns, it must be reset by pressing the button located on the

thermostat itself on the outside of the appliance under the black screw-cap (see Figure 3).
C) The flame detector electrode touching the earth of the equipment or is interrupted.
D) The gas valve closes because it or its electrical or pneumatic connections are damaged.

Case 3: The limit thermostat (M1) arrests the burner

A) The heat exchangers have overheated: check operation of the fan, the gas pressure and the n ozzle s.
B) The heat exchangers overheat because of a build-up of dirt or obstruction of the air inlet vent. Clean the

exchangers or free the air inlet vent (clean the ventilation grille).
C) Check that electrical power is always present during operation.
To reset the thermostat, press the button located on the thermostat underneath the black screw cap (see

Figure 3 on page 8).

Case 4: The burner switches off and fails to restart, even if the ambient temperature requires it

A) Check the operation of the ambient thermostat, and the relative electrical connections.
B) Re-examine the position of the ambient thermostat (check that it is not influenced by external sources of

heat).
C) Check the signal from the blower that reaches the valve.

Case 5: The combustion air blower does not start

A) Check that the device’s protective fuse is intact.
B) Check that the ambient thermostat requires heat and is correctly connected.
C) Check the fuse on the power plug.
D) Check that the limit thermostat has not activated.
E) Check the power supply to the central control unit.
F) Check that the central control unit’s fuse is intact.
G) Check the electrical connections of the blower.

Case 6: The combustion air blower starts but the appliance does not switch on

A) The central ignition control unit does not begin the cycle: reeplace the internal fuse of the central control

unit or the unit itself.
B) Check the voltage supplied to the ignition transformer and to the gas valve.

Installation, Operation and Maintenance Manual– Ed.07/2005 27

EVOLUZIONE series natural gas/LPG heaters

3.5 LIST OF ACCESSORIES

The accessories listed below are specifically for Evoluzione series heaters.

3.5.1 CONTROL UNITS

- BASIC CONTROL UNIT (Code O-CTR001): summer/winter selection, selection of maximum/reduced
power operation, illuminated arrest warning/manual reset button (see Figure 26).

- THERMOSTATED CONTROL UNIT

(Code O-CTR009): control of ambient temperature via remote sensor,
automatic operation with modulation of maximum or reduced power according to temperature set, selection
of reduced power operation, antifreeze function, summer/winter selection, arrest warning light, reset button,
sound signal in the case of incorrect operation and/or wrong connections to the remote sensor (see Figure

27).

Figure 26 – BASIC CONTROL UNIT

Figure 27 – THERMOSTATED CONTROL UNIT

- INTEGRATED CONTROL UNIT (Code O-CTR010): daily and/or weekly timer programming, control of
ambient temperature via remote sensor, automatic operation with modulation of maximum or reduced
power according to temperature set, selection of reduced power operation, antifreeze function,
summer/winter selection, arrest warning light, reset button, sound signal in the case of incorrect operation
an/or wrong connections to the remote sensor (see Figure 28).

- STAGNO IP 55 INTEGRATED CONTROL UNIT

(Code O-CTR012): daily and/or weekly timer
programming, control of ambient temperature via remote sensor, automatic operation with modulation of
maximum or reduced power according to te mpera ture s et, selec tio n of red uced po wer op erat ion, a ntif reez e
function, summer/winter selection, arrest warning light, reset button, sound signal in the case of incorrect
operation an/or wrong connections to the remote sensor, lockable front cover (see Figure 29 ).

Figure 28 – INTEGRATED CONTROL UNIT

Figure 29 – STGNO IP55 INTEGRATED CONTROL UNIT

NOTE

28 Installation, Operation and Maintenance Manual - Ed.07/2005

EVOLUZIONE series natural gas/LPG heaters

- EXPANSION MODULE (Code O-CTR007): in

conjunction with the use of a thermostated or
integrated control, it allows up to a maximum of
three heaters to be controlled simultaneously
(see Figure 30)

Figure 30 – EXPANSION MODULE

3.5.2 MOUNTING BRACKETS

- UPPER MOUNTING BRACKET (Code O-STF003): supplied complete with condensate drain and
air/exhaust gas pipe connection kit with elements for drawing air/exhaust gases (see Figure 31).

- UPPER MOUNTING BRACKET WITH INTEGRATED WALL-MOUNTED OUTLETS (Code O-STF000):
supplied complete with double external terminal (Figure 32).

- ADJUSTABLE LOWER MOUNTING BRACKET (Code O-STF006): supplied complete with condensation
drain and air/exhaust gas pipe connection kit with elements for drawing air/exhaust gase s (Figure 33).

- TUBULAR MOUNTING BRACKET: complete with condensation drain and air/exhaust gas pipes kit with
elements for drawing air/exhaust gases (Code O-STF007 for models E32/E42/E43; Code O-STF008 for
models E52/E72) (Figure 34).

Figure 31 – UPPER MOUNTING BRACKET

Figure 32 – UPPER MOUNTING BRACKET WITH INTEGRATED

OUTLETS

Installation, Operation and Maintenance Manual– Ed.07/2005 29

EVOLUZIONE series natural gas/LPG heaters

Figure 33 – ADJUSTABLE LOWER MOUNTING BRACKET

Figure 34 – TUBULAR MOUNTING BRACKET

3.5.3 OTHER ACCESSORIES

- ADJUSTABLE ALUMINIUM FINS: these allow
the direction of warm air flow to be adjusted
horizontally and/or vertically. Each kit (Code O­LTT000) consists of 20 fins (see Figure 35).

- CONDENSATE SEPARATOR (Code O-

SCN000): this element allows any condensate
that forms on the exhaust gas pipe to be
collected and drained. It must be used when
there is a vertical length of exhaust gas piping
of 1 metre or longer and when ROBUR
mounting brackets are not used (see Figure

36).

Figure 35 – ADJUSTABLE ALUMINIUM FIN

- AIR/EXHAUST PIPE
CONNECTION WITH INTAKE
ELEMENT (Code O-SCR010):
consisting of 2 vertical connectors
(see Figure 37) that allow the
connection of the exhaust gas
pipe and the air pipe to the
heater. It is necessary when
ROBUR mounting brackets are
not used.

Figure 36 – CONDENSATE

SEPARATOR

Figure 37 – AIR/EXHAUST GAS PIPE

CONNECTOR

30 Installation, Operation and Maintenance Manual - Ed.07/2005

EVOLUZIONE series natural gas/LPG heaters

With the aim of continuously improving the quality of its products, ROBUR S.p.A. reserves the right to modify the data

and contents of this manual without prior notice.

ROBUR S.p.A.

Via Parigi, 4/6

24040 Verdellino/Zingonia (Bergamo)

Tel. [phone] Fax 035 - 884165

INTERNET: www.ROBUR.it e-mail [e-mail]

Codice: D-LBR345 05 MED SPV 042 28/07/2005