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Forced draught gas burners 强制通风燃气燃烧器 Progressive two-stage operation 一两段火运行 编码 型号 类型 CODE - MODEL - TYPE - 20033795 RS 34 MZ 883 T 20033809 RS 44 MZ 884 T 20033835 RS 44 MZ 884 T 20033805 (1) - 03/2011...
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IDENTIFICATION The Identification Plate on the product gives the serial number, model and main technical and performance data. If the Identification Plate is tampered with, removed or missing, the product cannot be clearly identified, thus making any installation or maintenance work potentially dangerous. GENERAL WARNINGS The dimension of the boiler’s combustion chamber must respond to specific values, in order to guarantee a combustion with the lowest polluting emissions rate.
• The burners are shipped in cardboard boxes with the overall dimensions shown in tab. (B). • The weight of the burner complete with pack- aging is indicated in tab. (B). OVERALL DIMENSIONS (C) RS 34 MZ 1000 Approximate measurements RS 44 MZ 1000 The overall dimensions of the burner are given in (C).
• a MAXIMUM OUTPUT, selected within area A, • and a MINIMUM OUTPUT, which must not be lower than the minimum limit in the diagram: RS 34 MZ = 45 kW RS 44 MZ = 80 kW Attention The FIRING RATE values have been obtained considering an ambient temperature of 20 °C, a...
11.2 A pressure of 7.3 mbar (column 1) corresponds in 53.7 53.7 25.4 12.7 the table RS 34 MZ to an output of 260 kW. This value serves as a rough guide, the effective 10.8 59.9 28.1 14.0 delivery must be measured at the gas meter.
Any other position could compromise the correct operation of the appliance. Installation 5 is forbidden, for safety reasons. RS 34 MZ BOILER PLATE (B) RS 44 MZ Pierce the closing plate of the combustion chamber, as in (B). The position of the threaded...
SETTING THE COMBUSTION HEAD Installation operations are now at the stage where the blast tube and the pipe coupling are secured to the boiler as shown in fig.(A). It is therefore particularly easy to adjust the combus- tion head. Air adjustment (A - B) Rotate the screw 1)(A) until the notch on the lamina 2)(A) corresponds with the surface of the plate 3)(A).
GAS FEEDING LINE • The gas train must be connected to the gas attachment 1)(A), using flange 2), gasket 3) and screws 4) supplied with the burner. • The gas train can enter the burner from the right or left side, depending on which is the most convenient, see fig.(A).
ADJUSTMENTS PRIOR TO FIRING MIN GAS PRESSURE SWITCH AIR PRESSURE SWITCH ATTENTION THE FIRST FIRING MUST BE CARRIED OUT BY QUALIFIED PERSONNEL WITH THE RIGHT INSTRUMENTS. The adjustment of the combustion head, air, was described on page 9. In addition, the following adjustments must also be made: - open manual valves up-line from the gas train.
BURNER CALIBRATION The optimum calibration of the burner requires an analysis of the flue gases at the boiler outlet. Adjust successively: Burner off 1st stage 1 - 2nd stage burner output 2 - 1st stage burner output Burner on 2nd stage 3 - Intermediate outputs 4 - Air pressure switch 5 - Minimum gas pressure switch...
Adjusting air delivery Progressively adjust the end profile of cam 4)(A) by turning the cam adjustment screws as they appear through the access opening 6)(A). - Lock the screws to increase air delivery. - Loose the screws to reduce air delivery. 2 - 1ST STAGE BURNER OUTPUT Burner power in 1st stage operation must be selected within the firing rate range shown on...
4 - AIR PRESSURE SWITCH (A) AIR PRESSURE SWITCH Adjust the air pressure switch after having per- formed all other burner adjustments with the air pressure switch set to the start of the scale (A). With the burner operating in 1st stage, increase adjustment pressure by slowly turning the rela- tive knob clockwise until the burner locks out.
BURNER OPERATION NORMAL FIRING BURNER START UP (A) (n° = seconds from instant 0) • : Remote control TL closes. Servomotor starts: it rotates during opening up to the angle set on cam St1. After about 3s: • 0 s : The control box starting cycle begins. •...
FINAL CHECKS (with the burner working): • disconnect a wire of the minimum gas pres- sure switch; • switch on the thermostat/pressure switch TL; • switch on the thermostat/pressure switch TS; the burner must stop. • disconnect the air adduction tube of the pres- sure switch;...
TO OPEN THE BURNER (A): OPENING THE BURNER - Switch off the electrical power. - Remove screw 1) and withdraw casing 2). - Disengage the articulated coupling 3) from the graduated sector 4). - Remove screw 5) only if the models have a long head, retract the burner on guides 6) for around 100 mm.
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BURNER START-UP CYCLE DIAGNOSTICS During start-up, indication is according to the following table: COLOUR CODE TABLE Sequences Colour code Pre-purging Firing phase Operation, flame ok Operating with weak flame signal Electrical supply lower than ~ 170V Lockout Extraneous light Yellow Green Key to layout: RESETTING THE CONTROL BOX AND USING DIAGNOSTICS...
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Signal Problem Possible cause Recommended remedy Once the pre-purging phase - The operation solenoid lets little gas through ..Increase 2 blinks and safety time have passed, - One of the two solenoid valves does not open..Replace the burner goes into lockout without the appearance of the...
NORMAL OPERATION / FLAME DETECTION TIME The control box has a further function to guarantee the correct burner operation (signal: GREEN LED permanently on). To use this function, wait at least ten seconds from the burner ignition and then press the control box button for a minimum of 3 seconds. After releasing the button, the GREEN LED starts flashing as shown in the figure below.
The electrical wiring must be carried out in conformity with the regulations in force in the countries of destination, and by qualified personnel. Riello S.p.A. cannot accept any responsibility for modifica- tions or connections other than those shown in these dia- grams.
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