Riello RC2-38 Kurzanleitung

2903445 (2) - 05/2017

Installation, use and maintenance instructions

Light oil burners

One stage operation

CODE MODEL TYPE

3571000 RC2-38 732T3

3572080 RC2.1-46 732T6

20062926 RC2.1-46 TL 732T6

3445

INDEX

1. BURNER DESCRIPTION

One stage light oil burner.

1.1 BURNER EQUIPMENT

Flexible oil pipes with nipples . . . . . . No. 2 Nut and pin . . . . . . . . . . . . . . . . . . . . . . . . . . .No. 1

Flange with insulating gasket. . . . . . . No. 1

1. BURNER DESCRIPTION. . . . . . . . . . . . . . 1

1.1 Burner equipment. . . . . . . . . . . . . . . . . . . . 1

2. TECHNICAL DATA . . . . . . . . . . . . . . . . . . 2

2.1 Technical data . . . . . . . . . . . . . . . . . . . . . . 2

2.2 Overall dimensions. . . . . . . . . . . . . . . . . . . 2

2.3 Firing rates . . . . . . . . . . . . . . . . . . . . . . . . . 2

2.4 Accessories . . . . . . . . . . . . . . . . . . . . . . . . 3

3. INSTALLATION . . . . . . . . . . . . . . . . . . . . . 4

3.1 Working position. . . . . . . . . . . . . . . . . . . . . 4

3.2 Boiler fixing. . . . . . . . . . . . . . . . . . . . . . . . . 5

3.3 Burner assembly. . . . . . . . . . . . . . . . . . . . . 5

3.4 Hydraulic systems. . . . . . . . . . . . . . . . . . . . 7

3.5 Electrical wiring. . . . . . . . . . . . . . . . . . . . . . 9

4. WORKING . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.1 Combustion adjustment. . . . . . . . . . . . . . . . 10

4.2 Nozzles recommended . . . . . . . . . . . . . . . . 10

4.3 Pump pressure . . . . . . . . . . . . . . . . . . . . . . 10

4.4 Maintenance position . . . . . . . . . . . . . . . . . 11

4.5 Electrodes adjustment. . . . . . . . . . . . . . . . . 11

4.6 Air adjustment . . . . . . . . . . . . . . . . . . . . . . . 12

4.7 Burner start-up cycle . . . . . . . . . . . . . . . . . . 12

5. MAINTENANCE . . . . . . . . . . . . . . . . . . . . . 13

5.1 Access to the fan. . . . . . . . . . . . . . . . . . . . . 13

6. FAULTS / SOLUTIONS . . . . . . . . . . . . . . . 14

7. SAFETY WARNINGS . . . . . . . . . . . . . . . . . 15

7.1 Burner identification. . . . . . . . . . . . . . . . . . . 15

7.2 Basic safety rules . . . . . . . . . . . . . . . . . . . . 15

1 – Return line

2 – Suction line

3 – Oil pump

4 – Gauge connection

5 – Pressure adjuster

6 – Control box

7 – Reset button with lock-out lamp

8 – Air adjustment knob

9 – Suction gauge connection

10 – Flange with insulating gasket

11 – Combustion head

12 – Feeder

➤

Burner with CE marking in conformity with Directives: Machine Directive 2006/42/EC, Low Voltage Di-

rective 2014/35/UE, Electromagnetic Compatibility 2014/30/UE.

Fig. 1

D7000

3445

2. TECHNICAL DATA

2.1 TECHNICAL DATA

2.2 OVERALL DIMENSIONS

2.3 FIRING RATES,

(as EN 267)

TYPE 732T3 732T6

Output

Thermal power 2.0

−

3.2 kg/h

−

38 kW 2.8

−

3.9 kg/h

33,2

−

46,2 kW

Fuel Light oil, viscosity 4

−

6 mm2/s at 20°C (Hi= 11.86 kWh/kg)

Electrical supply Single phase,

50Hz 230V

10%

Motor Run current 0.75A – 2800 rpm – 294 rad/s

Capacitor 4,5 µF

Ignition transformer Secondary 8 kV – 16 mA

Pump Pressure: 7

−

15 bar

Absorbed electrical power 0,115 kW

BURNER CODE A

3571000 - 3572080 109

20062926 177

D7010

45°

180

130

150

75 72

120 146 109 191

183

256

D7001

22 24 26 28 30 32 34 36 38 40

2.5

Pressure in combustion

chamber – mbar

VERSION WITHOUT BAFFLE PLATE CF - BF

D8792

kg/h

732T3

3445

2.4 ACCESSORIES

BF AIR INTAKE

In case of BF application, air is fed in through a flexible or

rigid pipe connected to the air intake (A, fig. 5, page 4).

This component is supplied separately.

To install this fitting, you must:

➤

remove the knob unit (1) from the burner by unscrew-

ing the two screws (2), see fig. 2;

➤

apply the O-ring (4) to the air intake (3) as illustrated in

figure 3;

➤

place the air intake (3) horizontally against the feeder

(5), making sure you pull the locking device (6, fig. 5,

page 4);

➤

turn clockwise to fasten the air intake (3) to the burner

and release the locking device (6). The air intake can

be turned to meet installation needs, as illustrated in

figure 4.

➤

To adjust, you must pull the locking device (6, fig. 5,

page 4) and turn the air intake until you are happy with

the position.

22 24 26 28 30 32 34 36 38 40

2.5

42 44 46 48

3.5 4

VERSION WITH BAFFLE PLATE CF - BF

Pressure in combustion

chamber – mbar

D8793

kg/h

732T3 732T6

D7014

Fig. 2

Fig. 3

D7005

Fig. 4

3445

To adjust delivery, proceed as follows:

➤

loosen screw (7) and adjust the ring (8),

turning it to the desired setting;

➤

secure in place by tightening screw (7)

with a driving torque of 0.8 Nm.

BAFFLE PLATE

(see fig. 6)

The baffle plate is installed whenever the burner’s

purging performance needs increasing. This compo-

nent is supplied separately.

To install this fitting, you must:

➤

unscrew the three screws (9, fig. 2 page 3) and

remove the air adjustment unit (5);

➤

apply the baffle plate (10) by means of the two

screws (11), screwing it on with a driving torque

of 0.8 Nm;

➤

follow the above procedure in the reverse order,

restoring the feeder (5) to its original position,

tightening the two screws (9) with a driving torque

not exceeding 0.8 Nm;

➤

make extra sure you position the O-ring (12) cor-

rectly.

3. INSTALLATION

THE BURNER MUST BE INSTALLED IN CONFORMITY WITH LEGISLATION AND LOCAL STANDARDS.

3.1 WORKING POSITION

(CF and BF version)

D7011

Fig. 5

D7013

Fig. 6

The burner is designed to work only in the positions 1, 2and 3.

Any other position could compromise the correct working of the appliance.

Installations 4and 5are forbidden for safety reasons.

D7003

1 2 3 4 5

3445

3.2 BOILER FIXING

➤

Secure the flange to the burner as follows: fit the screw and the two nuts (see fig. 7) on the flange (1).

➤

Widen, if necessary, the insulating gasket holes (2,fig. 8), taking care not to damage them.

➤

Fix the flange (1) to the boiler door (5, fig. 9) interposing the insulating gasket (2), using the screws

(3) and (if necessary) the nuts (4).

3.3 BURNER ASSEMBLY

In the case of CF application, combustion air is fed through the

feeder unit (A).

In the case of BF application, combustion air is fed through a flexible

or rigid pipe connected to the air intake (B).

FOR CORRECT BF APPLICATION, THE BURNER MUST BE

INSTALLED ON AN APPROPRIATE BF BOILER.

Consequently, you must comply with the following requirements and

instructions:

➤

The combustion air intake tube must be:

- fastened securely to the burner;

- made of a suitable material, with temperature characteristics in

the range - 30 °C to 80 °C;

- in compliance with all requirements of applicable regulations in

force in the country of destination.

E9239

E9238

D5012

Fig. 7

Fig. 9

Fig. 8

D7015

S7011

CF APPLICATIONS

BF APPLICATIONS

3445

➤

The intake-tube / burner system must not allow a loss of over 2 m

/h at 0.5mbar:

for instance, the above requirements will be met if you use flues for pressure exhaust of flue gases (the con-

densation kind).

➤

Make sure the air intake tube’s inlet is positioned so that it is not likely to be obstructed by foreign matter and,

where necessary, use suitable screens.

➤

The temperature of the incoming air must not exceed 40 °C;

➤

The inside diameter of the hose must be at least 80 mm.

➤

The intake tube can be up to 6 metres in length.

Warning: length is reduced if there are bends in the intake section.

For instance, using a tube with a smooth inside surface, you must allow for the following losses:

- for each 45° bend, tube length is reduced by 0.5 m;

- for each 90° bend, tube length is reduced by 0.8 m.

BURNER INSTALLATION MUST COMPLY WITH ONE OF THE INSTALLATIONS ILLUSTRATED IN THE

FIGURES BELOW.

➤

Under no circumstances should the air’s entry in the hose intake area be obstructed.

➤

The hose must not be blocked in any way or feature a shutting device (valves, membranes etc.).

➤

Coaxial tubes must not be installed for any reason.

ATTENTION

S7851

S7853

S7876

3445

3.4 HYDRAULIC SYSTEMS

It is necessary to install a filter on the fuel supply line.

◆

The pump is designed to allow working with two pipes.

◆

Before starting the burner make sure that the return pipe-line is

not clogged. An excessive back pressure (

≥

1 bar) would cause

the damage of the pump seal, with subsequent fuel leaks inside

the burner.

◆

In order to obtain one pipe working it is necessary to unscrew

the return plug (2), remove the by-pass screw (3) and then

screw again the plug (2) with a torque of 0.5 Nm.

The pump has a delivery pressure regulation device (5). Pressure

increases if turned in a clockwise direction, and decreases if

turned in the other direction. An indication of sensitivity is 1 bar

per turn. The pressure can be regulated in a range of 7

15 bar.

Do not loosen the knob (8) and periodically check that it is

firmly fixed, for safety reasons.

Pressurised systems have a positive fuel pressure on intake to the

burner. Usually the tank is higher than the burner, or the fuel pump-

ing systems are on the outside of the boiler.

Figure 12 is an example of connection to a pressurised ring, no mat-

ter what position the ring feeder tank is in.

In the system in fig. 11, the table shows the maximum indicated lengths for the supply line, depending on

the difference in level, length and the diameter of the oil pipes.

PRIMING PUMP

it is sufficient to loosen the suction gauge connection (6, fig. 10) and wait until oil flows out.

D5912

1- Suction line

2- Return line

3- By-pass screw

4- Gauge connection

5- Pressure adjuster

6- Suction gauge connection

7- Valve

8- Knob

Fig. 10

PUMP

(see fig. 10)

PRESSURISED ONE PIPE SYSTEMS

(fig. 11 and 12)

max. 4 m

D7006

meters

L meters

I. D.

8 mm I. D.

10 mm

0.5

1.5

100

●

ONLY FOR ITALY:

Automatic shut-off device as per Ministry of Internal Affairs’ regulation no. 73 dated 7/29/71.

The installer must ensure that the supply pressure is not above 0.5 bar.

Above that level, the pump seal is subject to too much stress.

H= difference of level; L= max. length of the suction line; I. D. = internal diameter of the oil pipes.

●

D7007

Fig. 11 Fig. 12

SYSTEM NOT PERMITTED

IN GERMANY

3445

Depressurised systems have a negative fuel pressure (depression) on intake to the burner.

Usually the tank is lower than the burner.

In the systems in figs. 13 and 14, the table shows the maximum indicated lengths for the supply line,

depending on the difference in level, length and the diameter of the oil pipes.

PRIMING PUMP

On the systems in fig. 13 and 14 start the burner and wait for the priming.

Should lock-out occur prior to the arrival of the fuel, await at least 20 seconds before repeating the operation.

In two pipe vacuum systems (fig. 14) the return line should terminate within the oil tank at the same level as

the suction line. In this case a non-return valve is not required.

Should however the return line arrive over the fuel level, a non-return valve is required.

This solution however is less safe than previous one, due to the possibility of leakage of the valve.

DEPRESSURISED SYSTEMS

(fig. 13 and 14)

max. 4 m

D7008

●●

meters

L meters

I. D.

8 mm I. D.

10 mm

0.5

1.5

3.5

100

●

ONLY FOR ITALY:

Automatic shut-off device as per Ministry of Internal Affairs’ regulation no. 73

dated 7/29/71.

The installer must ensure that the supply depression is not above 0.4 bar

(30 cm Hg).

Above that level, gas leaks out from the fuel.

The pipes must all be perfectly sealed.

H= difference of level; L= max. length of the suction line;

I. D. = internal diameter of the oil pipes.

ONE PIPE SYSTEM TWO PIPE SYSTEMFig. 13 Fig. 14

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