Riello GAS 3 Kurzanleitung

Installation, use and maintenance instructions

2915858 (3) - 03/2014

Forced draught gas burners

Code Model Type

3751960 GAS 3 519T55

3751961 GAS 3 519T55

5858

DECLARATION

Declaration of conformity in accordance with ISO / IEC 17050-1

Manufacturer: RIELLO S.p.A.

Address: Via Pilade Riello, 7

37045 Legnago (VR)

Product: Forced draught gas burner

Model: GAS 3

These products are in compliance with the following Technical Standards:

EN 676

EN 292

and according to the European Directives:

MD 2006/42/EC Machine Directive

LVD 2006/95/EC Low Voltage Directive

EMC 2004/108/EC Electromagnetic Compatibility

The quality is guaranteed by a quality and management system certified in accordance with UNI EN ISO

9001.

Legnago, 10.10.2013 Executive Director

RIELLO S.p.A. - Burner Department

Mr. G. Conticini

Research & Development Director

RIELLO S.p.A. - Burner Department

Mr. R. Cattaneo

5858 2

TECHNICAL DATA

BURNER DESCRIPTION

STANDARD EQUIPMENT

OVERALL DIMENSIONS

Thermal output 150 ÷ 350 kW - 130,000 ÷ 300,000 kcal/h

Fuel Natural gas Pci 8 - 10 kWh/m3= 7000 - 8600 kcal/m3

Minimum gas pressure For maximum output 11.1 mbar are needed measured at the coupling

with nil pressure in the combustion chamber and gas with calorific val-

ue of 8600 kcal/m3

Maximum gas pressure 35 mbar

Electrical supply Single phase 230 V ±10% ~ 50Hz

Motor 2 A / 230 V

Capacitor 450V - 6.3µF

Ignition transformer Primary: 2A/230V - Secondary: 1 x 9 kV - 33 mA

Absorbed electrical power 0.4 kW

Quantity Description

1 Flange

1 Gasket

8Screws

1 Flange gasket

Fig. 1

1- Air shutter control

2- Air shutter lock-out

3- Control box reset button

4- Fair leads

5- Wiring terminal block

6- Over pressure switch (2)

7- Air pressure switch (1)

8- Gas pressure test-point

* Long combustion head.

5858

COMBUSTION CHAMBER PRESSURE - OUTPUT

MINIMUM GAS PRESSURE - OUTPUT

Pressure: Detected at the pressure test-point 8) (fig. 1) with nil mbar into the combustion chamber.

Should the combustion chamber be pressurized, the pressure necessary will be that of the graph

plus the pressurization value.

Example: To obtain 270 kW it is necessary a gas pressure of 8 mbar and the combustion head set as

indicated at page 9. If the combustion chamber is pressurized at 2 mbar, the pressure detected at

the test-point 8) is: 8 + 2 = 10 mbar.

If this value is too high, for very low gas pipework pressures, the gas gear 6) (page 9) could be more

open. Do not decrease the pressure at the coupling under the values shown in the diagram.

Output: The maximum value is obtainable with gas Pci 8600 kcal/m3.

5858 4

FIXING TO THE BOILER

Separate the combustion head from the

burner body by loosening the screws 1)

and 2) and withdrawing the group A) from

the holding bars 3). Fix the group B) to the

boiler front plate 4) using the gasket 5) pro-

vided as accessory.

GAS DISTRIBUTORS

GAS SUPPLY

Please refer to Appliance Technical Instruction for Gas train details.

LPG DISTRIBUTOR

NATURAL GAS DISTRIBUTOR

5858

BURNER ELECTRICAL WIRING

(carried out by the factory)

KEY TO LAYOUT

P1 Air pressure switch

P2 Over pressure switch

CCapacitor

F1 RFI Suppressor

K1 Relay

MB Burner terminal strip

MV Fan motor

RMG Control box

SO Ionisation probe

TA Ignition transformer

TB Burner earth

ATTENTION

In the case of phase-phase feed, a bridge must be fitted on the control box terminal board between terminal 6

and the earth terminal.

WIRING TERMINAL STRIP (SEE PAG. 6)

2565

5858 6

ELECTRICAL CONNECTIONS TO THE WIRING TERMINAL STRIP

(to be carried out by the installer)

Warning

Connect gas valves to terminals 10-11-12 only, exactly as shown on the diagram.

KEY TO LAYOUT

MB Terminal strip

CPI Valve position switch

HRemote lock out signal

TB Burner earth

TL Limit load control system

TS Safety load control system

VA Ignition valve

VR Adjusment valve

VS Safety valve

2566

5858

FIXING OF THE ELECTRICAL WIRES

All the electrical wires, which are to be connected to the terminal block 5) (fig. 1) shall pass through the fair

leads 4) (fig. 1) as for this scheme.

1- Single phase supply: fair lead Pg 13.5

2- Adjustment thermostat: fair lead Pg 13.5

3- Safety thermostat: fair lead Pg 13.5

4 - 5 - 6 - 7 - 8 - Pre-sheared holes

Further prospective signals or controls can be connected to the burner wiring terminal board by removing the

metal weldnuts from the pre-sheared holes and inserting a commun fair lead for the passage and the clamping

of the leads.

NOTES

-Do not exchange the neutral wire with the phase (avoid the plug-pin connection).

- Carry out a safe earth connection.

- Check the stop of the burner, by opening the boiler thermostat and the burner lock-out, by disconnecting the

lead from the flame probe.

WARNING

When closing the burner on its slide-bars, pull towards the outside the high voltage cable and the cable of the

flame detection probe, till to little tension.

5858 8

START-UP

For Gas train settings, please refer to Appliance Technical Instructions.

AIR PRESSURE SWITCH “1”

The air pressure switch is set after adjustment have been made. Begin with the switch at the lowest setting. With

the burner working at the minimum output, adjust the dial clockwise, increasing its value until the burner locks

out. Now reduce the value by one set point, turning the dial anti-clockwise.

Check for reliable burner operation. If the burner locks out, reduce the value by a further set point.

OVER PRESSURE SWITCH “2”

The over pressure switch must be set after all other adjustments have been made. its purpose is to cause the

burner to shut down if the combustion chamber pressure increases above normal operational values.

Begin with the switch at the highest setting, with the burner working at the maximum output, adjust the dial anti-

clockwise, decreasing its value until the burner shuts down. Now increase the value by one set point and re-start

the burner. If the burner shuts down due to the pressure surge in the combustion chamber caused by the ignition

gas, check that the start gas rate is less than 25% of the main gas rate. If it is, increase the value on the over

pressure switch by a further half a set point and repeat the test.

NOTE

To comply with the Appliance Standard PREN 1020, the CO value must not exceed 0.1% under normal opera-

tional conditions.

CAUTION

Do not turn the ionization probe, maintain the drawing position; should it be close to the ignition electrode, dam-

age may occur to the control box amplifier.

The right positions of the ionisation probe and of the ignition electrode (as shown in the drawing) is obtainable

by coinciding their insulators planes with sloping planes of the fastening support.

Probe position Ignition electrode position

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