Riello GAS 7 P/M Kurzanleitung

Installation, use and maintenance instructions

2915245 (5) - 05/2018

Forced draught gas burner

Progressive two-stage or modulating operation

CODE MODEL TYPE

3753781 GAS 7 P/M 537 T80

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 7 P/M

These products are in compliance with the following Technical Standards:

EN 676

EN 12100

and according to the European Directives:

MD 2006/42/EC Machine Directive

LVD 2014/35/UE Low Voltage Directive

EMC 2014/30/UE Electromagnetic Compatibility

The quality is guaranteed by a quality and management system certified in accordance with UNI EN ISO 9001.

Mr. U. Ferretti Mr. F. Comencini

1 2915245

TECHNICAL DATA

ELECTRICAL DATA

BURNER DESCRIPTION

BURNER EQUIPMENT

Thermal power 400 - 1760 kW - 344.000 - 1.513.600 kcal/h

Operation • Two stages progressive

• Modulating (kit with controller available upon request)

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

Minimum gas pressure For maximum output 14.5 mbar are needed measured at the coupling with nil

pressure in the combustion chamber and gas with calorific value of 8600 kcal/

Maximum gas pressure 150 mbar

Electrical supply Three-phase 220V +10% -10% ~ 60Hz without neutral

380V +10% -10% ~ 60Hz with neutral

Motor 10A / 230V - 5.8A / 400V

Ignition transformer Primary: 1.8A / 220V - Secondary: 1 x 8 kV - 30 mA

Absorbed electrical power 4.1 kW

Quantity Burner accessories

1 Flange

1Gasket

8Screws

1 Flange gasket

1 Servomotor controlling air and gas

2 Adjustment cam

3 Power controller (for modulating to be required

separately)

4 Control box re-set button

5 Servomotor connection

6 Fair leads

7 Wiring terminal block

8 Re-set push-button of the motor overload relay

9 Air pressure switch

10 Gas pressure test-point

Fig. 1

D2206

2915245 2

MAXIMUM DIMENSIONS

COMBUSTION CHAMBER PRESSURE - MAXIMUM OUTPUT

(in compliance with DIN 4788)

Min. output: 400 kW - 344.000 kcal/h.

Boiler front-plate

drilling

*Length available with special blast tube to be separately required.

Burner

230

230 M12

D1785

D2201

D2202

3 2915245

MINIMUM GAS PRESSURE - OUTPUT

Pressure: detected at the pressure test-point 10) (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 1250 kW it is necessary a gas pressure of 12 mbar and the combustion head set as indicated

at page 8.

If the combustion chamber is pressurized at 2 mbar, the pressure detected at the test-point 9) is: 12 +

2 = 14 mbar.

If this value is too high, for very low gas pipework pressures, the gas gear 6) (page 8) 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.

CORRELATION BETWEEN GAS PRESSURE AND BURNER OUTPUT

D2203

2915245 4

FIXING TO THE BOILER

GAS SUPPLY

1 - Gas pipe line

2 - Cock valve

3 - Filter

4 - Pressure stabilizer

5 - Pressure test-point

6 - Minimal gas pressure switch

7 - Safety valve

8 - Adjustment valve

9 - Adjusting throttle valve

10 - Burner

11 - Gas leak control device

Separate the blast tube from the burner body

by loosening the screws 7) and 3), fix the

blast tube to the boiler front plate 5) using the

gasket 6) provided.

Insert the burner on the holding bars 4) and

fasten the screws 7) and 3).

The combustion head adjustment should be

carried out as follows:

Loosen the screws 2) unhook the tension

rod of the air damper 1) remove the

connecting lead of the servomotor, withdraw

the group A) from the group B).

After the setting, re-assemble and verify that

the tension rod of the air damper was locked.

D2178

D2179

Supplied

upon request To be carried out by the installer

5 2915245

BURNER ELECTRICAL WIRING

(carried out y the factory)

Key to layout

CMV Motor contactor

LFL... Control box

MB Burner terminal strip

MV Fan motor

PA Air pressure switch

RT Thermal cut-out

SM Servomotor

SO Ionisation probe

SP Plug-socket

TA Ignition transformer

TB Burner ground

20152071

2915245 6

ELECTRICAL CONNECTIONS TO THE WIRING TERMINAL BLOCK

(to be carried out by the installer)

NOTICE

- The electric wiring carried out by the installer must be in compliance with the rules in force in the Country.

- Leads minimal section 1 mm2.

- Adjustment for the motor thermal relay:

• at the beginning of the scale for 380 V;

• at the end of the scale for 220 V.

- Burners with non-stop operation.

For safety reasons, this type of burner must be stopped every 24 hours of operation, by means of an hours-

counter to be connected in series with the adjustment devices.

Key to layout

BP - Pressure probe

BT - Temperature probe

MB - Burner terminal strip

PC - Check pressure switch

PG - Min. gas pressure switch

RWF50 - Power controller

TR - High-low mode load remote control sys-

tem: controls operating stages 1 and 2

TL - Load limit remote control system: shuts

down the burner when the boiler temper-

ature or pressure reaches the preset

value.

TS - Safety load control system: operates

when TL is faulty

VR - Adjustment valve

VS - Safety valve

20152143

7 2915245

FIXING OF THE ELECTRICAL WIRES

All the electrical wires, which are to be connected to the terminal block 7) (fig. 1) shall pass through the fair

leads 6) (fig. 1) as per this scheme.

1- Three phase supply : fair lead Pg 21

2- Single phase supply : fair lead Pg 13.5

3- Adjustment thermostat : fair lead Pg 13.5

4- Safety thermostat : fair lead Pg 13.5

5- Gas train : fair lead Pg 13.5, sheath ø 13

6-2nd stage thermostat : fair lead Pg 13.5 (probe for modulating version)

7- Pre-sheared holes : fair lead Pg 13.5 (for power controller - modulating version)

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.

D2184

2915245 8

BURNER START-UP CYCLE

Air-purge: loosen the screw placed on the minimal gas pressure switch mounted on the gas train.

AIR PRESSURE SWITCH

The air pressure switch setting shall be carried out after having set all other

adjustments of the burner and the air pressure switch shall be at its lowest

set-point.

When the burner is operating, increase the adjustment pressure by turning

- slowly - clockwise the knob till reaching the burner lock-out.

Thereafter, turn the knob anticlockwise for 1 mbar and repeat the burner

start-up for checking the regularity: if lock-out intervenes turn the knob an-

ticlockwise for 0.5 mbar.

CAUTION:

do not turn the ionization probe, maintain the drawing position; should it be close to the ignition electrode, damage

may occur to the control box amplifier.

Screw

Plug for pressure measure

Pressure switch

S7506

1 ÷ 10

mbar

Adjustment knob

S7507

D2206

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