Riello REG 35.3 Quick start guide

Installation, use and maintenance instructions
Οδηγίες εγκατάστασης, χρήσης και συντήρησης
2902518 (6) - 10/2014
Light oil burner
Καυστήρας Πετρελαίου
CODE - ΚΩ∆ΙΚΟΣ MODEL - ΜΟΝΤΕΛΟ TYPE - ΤΥΠΟΣ
3772117 REG 35.3 721 T
3772217 REG 35.5 722 T
GB
GR
One stage operation
Μονοβάθμιοι

2518
INDEX
1. TECHNICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.1 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2. BURNER DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.1 Burner equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.2 Firing rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.3 Overall dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3. INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3.1 Boiler fixing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3.2 Hydraulic systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.3 Electrical wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. WORKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.1 Combustion adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.2 Recommended nozzles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
4.3 Electrodes adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.4 Pump pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.5 Combustion head setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.6 Air damper adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.7 Burner start-up cycle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
GB

2518
1GB
1. TECHNICAL DATA
1.1 TECHNICAL DATA
2. BURNER DESCRIPTION
One stage light oil burner.
OBurner with CE marking in conformity with EEC directives: EMC 2004/108/EC, Low Voltage 2006/95/EC,
Machines 2006/42/EC and Efficiency 92/42/EC.
OThe burner meets protection level of IP X0D (IP 40), EN 60529.
OCE Certification No.: 0036 0342/03 as 92/42/EEC.
2.1 BURNER EQUIPMENT
Flexible pipes with nipples. . . . . . . . No. 2 Flange with insulating gasket. . . . . . . . . . . . . . . . . No. 1
TYPE 721T 722T
Output - Thermal power 1.8 – 3.2 kg/h - 21 – 38 kW 2.3 – 5 kg/h - 27 – 60 kW
Fuel Light oil, viscosity 4 –6 mm2/s at 20 °C
Electrical supply Single phase 230V ± 10% ~50Hz
Motor Run current 0.7A Run current 0.75A
2750 rpm – 289 rad/s
Capacitor 4 F
Ignition transformer Secondary 8 kV - 16 mA
Pump Pressure: 8 – 15 bar – min. output 22 kg/h
Absorbed electrical power 0.17 kW
1– Flange with insulating gasket
2– Air damper
3– Photoresistance
4– Nozzle holder assembly
5– Reset button with lock-out lamp
6– Control box
7– Oil pump
8– Protection crankcase
Fig. 1
2 3 4 5 6
8D6308
7
1

2518
2GB
2.2 FIRING RATES (as EN 267)
2.3 OVERALL DIMENSIONS
3. INSTALLATION
3.1 BOILER FIXING
Pressure in the combustion
chamber – mbar
Light oil output- kg/h
Thermal power - kW
721T 722T
1.8 2 2.5 3 3.5
20 3525 30 40 45 50 55
454.5
60
0.8
0.6
0.4
0.2
0
D6128
FlangeBurner
211.5
215.5
279
130
150
95
170
6565
45
°
45
°
211
11
D6307
ø 89
121.5
80
Remove 4 screws (1), insert the flange (2)
and tighten screws (1) again. Insert the
insulating gasket (3) (if necessary increase
the holes as shown in fig. 2) and fix the
burner to the boiler, (see fig. 3).
Fig. 2
S7700
D5242
1
2
3
Fig. 3

2518
3GB
3.2 HYDRAULIC SYSTEMS
H= difference of level; L= max. lenght of the suction line; I.D. = internal diameter of the oil pipes.
OThe pump is designed for operation on a two line
system. In order to convert it for single line system it
is necessary to unscrew the return plug (2), remove
the by- pass screw (3) and then to tighten the plug
(2) (see fig. 4).
OIt is necessary to install a filter on the fuel supply line.
OBefore starting the burner make sure that the return
pipe-line is not clogged. An excessive back pressure
would cause the damage of the pump seal.
max. 4 m
H
H
meters
L meters
I.D.
8 mm
I.D.
10 mm
0.5
1
1.5
2
10
20
40
60
20
40
80
100
D5517
Fig. 4
D6186
4 632 7
9
1
8
5
SYSTEM NOT PERMITTED
Fig. 5
PRIMING PUMP
On the system in fig. 5 it is sufficient to loosen the suction gauge
connection (5, fig. 4) and wait until oil flows out.
On the systems in fig. 6 and 7 start the burner and wait for the priming.
Should lock-out prior to the arrival of the fuel, await at least 20 seconds before
repeating the operation.
The pump suction should not exceed a maximum of 0.4 bar (30 cm Hg).
Beyond this limit gas is released from the oil. Oil pipes must be completely
tight.
In the vacuum systems (fig. 7) 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.
H
meters
L meters
I.D.
8 mm
I.D.
10 mm
0
0.5
1
1.5
2
3
3.5
35
30
25
20
15
8
6
100
100
100
90
70
30
20
D5518
H
H
H
H
max. 4 m
Fig. 6 Fig. 7
max. 4 m
1- Suction line
2- Return line
3- By-pass screw
4- Gauge connection
5- Suction gauge connection
6- Pressure adjuster
7-Coil
8- Main line port
9- Auxiliary pressure test point
IN GERMANY

2518
4GB
3.3 ELECTRICAL WIRING
WARNING
Do not exchange the neutral with the phase.
CARRIED-OUT
230V ~ 50Hz
L
Main switch
T6A
Safety thermostat
Limit thermostat
Remote lock-out signal
(230V - 0.5A max.)
Photoresistance
Oil valve
Capacitor
Burner-earth
M
Black
White
Blue
NL
M
N
Motor
Blue
Brown
T
T
CONTROL BOX
535SE
IN THE FACTORY
Fig. 8
S7031
ELECTRICAL CONNECTIONS
– Remove the protection crankcase (8,
fig. 1, page 1) after removing the 3
retainer screws. Widen the upper slit
and remove the protection crankcase,
inserting the oil pipe and the flexible oil
lines.
– Insert PG 13.5 cable-gland (1, fig. 8)
into the wire access hole and tighten it
with the nut.
– Insert the electrical cable into the con-
nector and make electrical connections
as shown in fig. 8.
– Put the protection crankcase back in
place.
NOTES
– Wires of 1 mm2section.
– The electrical wiring carried out by the installer must be
in compliance with the rules in force in the Country.
TESTING
Check the shut-down of the burner by opening the
thermostats and the lock-out by darkening the pho-
toresistance.
To remove the control box from the
burner proceed as follows:
– Take out the photoresistance (2, fig. 9,
page 5).
– Remove the nozzle holder assembly
(see fig. 9, page 5).
– Remove the protection crankcase (8,
fig. 1, page 1), as above mentioned.
– Disconnect the main voltage cable (3,
fig. 8).
– Remove screws (2, fig. 8) and discon-
nect wires of motors, photoresistance
and coil.
D5259

2518
5GB
4. WORKING
4.1 COMBUSTION ADJUSTMENT
In conformity with Efficiency Directive 92/42/EEC the application of the burner on the boiler, adjustment and
testing must be carried out observing the instruction manual of the boiler, including verification of the CO and
CO2 concentration in the flue gases, their temperatures and the average temperature of the water in the boiler.
To suit the required appliance output, choose the proper nozzle and adjust the pump pressure, the setting
of the combustion head, and the air damper opening in accordance with the following schedule.
The values shown in the table are measured on a CEN boiler (as per EN 267). They refer to 12.5% CO2at
sea level and with light oil and room temperature of 20°C.
4.2 RECOMMENDED NOZZLES:
Delavan type W -B ; Danfoss type S - B;
Monarch type R ; Steinen type S - Q.
To reach the nozzle, the diffuser-disc assem-
bly and the electrodes, proceed as follows:
(see fig. 9 and 10)
– Disconnect the oil pipe fitting (1) from the
pump. Take out the photoresistance (2),
loosen the retainer screws (3) of the cover.
– Remove the nozzle holder assembly after
turning and sliding it out. The nozzle holder
assembly must stay on the left side of the
burner during its sliding.
– Remove the diffuser-disc assembly (4) from
the nozzle holder (5) after loosening the
screw (6).
– Insert the proper nozzle (9) into the nozzle
holder and tighten securely.
– Replace the diffuser-disc assembly (4) and
insert it in the nozzle holder (5) until the end.
Lock with screw (6).
4.3 ELECTRODES ADJUSTMENT
Loosen the screw (7), move the electrodes
assembly (8) and lock the screw (7), (see fig. 10).
TYPE
Nozzle Pump
pressure
Burner
output
Comb. head
adjustment
Air damper
adjustment
GPH Angle bar kg/h ± 4% Set-point Set-point
721 T
0.50 80° 10 1.8 0.5 1.5
0.50 80° 12 2.0 1.0 2.0
0.60 60°/80° 12 2.4 2.0 4.0
0.65 60°/80° 12 2.6 2.5 4.5
0.75 60° 13 3.2 4.0 6.5
722 T
0.60 80° 11 2.3 0.5 2.5
0.65 60° 12 2.6 1 3.5
0.75 60° 12 3.0 1.5 3.5
0.85 60° 12 3.4 2.5 5.0
1.00 60° 12 4.0 3 7.5
1.10 60° 12 4.4 4 9.5
1.25 60° 12 5.0 4 10.0
S7030
4.5 – 0.5 mm
02 – 2.5 mm
54
7
69
8
D5268
Fig. 10
Fig. 9

2518
6GB
4.4 PUMP PRESSURE
The pump leaves the factory set at 12 bar.
4.5 COMBUSTION HEAD SETTING (see fig. 11)
It depends on the output of the burner and is carried out by rotating clockwise or counterclockwise the set-
ting screw (1) until the set-point marked on the regulating rod (2) is level with the outside plane of the noz-
zle holder assembly (3).
4.6 AIR DAMPER ADJUSTMENT (see fig. 12)
Loosen the screw (1) and move the indicator towards the required set-point and then lock the screw (1).
4.7 BURNER START-UP CYCLE
Lock out is indicated by a lamp on the control box (5, fig. 1, page 1).
S7032
1
2
3
Fig. 11
S7033
Fig. 12
Lock-out due to failure to light
A
Normal
D5029
~12s
Thermostat
Motor
Ignition transformer
Valve
Flame
Lock-out lamp
~12s 5s
A