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Installation, use and maintenance instructions 安装, 使用和维护说明书 Forced draught gas burners 强制通风燃气燃烧器 One-stage operation 一段火运行 编码 型号 类型 CODE - MODEL - TYPE - 20033785 RS 34/1 MZ 886 T 20033725 RS 44/1 MZ 873 T 20033803 (2) - 08/2011...
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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.
If the burner is installed in places particularly subject to radio disturbance (emission of signals exceeding 10 V/m) owing to the presence of an INVERTER, or in applications where the length of the thermostat connections exceeds 20 metres, a protection kit is available as an interface between the control box and the burner. BURNER RS 34/1 MZ RS 44/1 MZ Code 3010386 •...
15 Gas train connection flange 16 Boiler fixing flange 17 Flame stability disc 18 Flame inspection window 19 Motor capacitor (RS 34/1 MZ) 20 Control box with lockout pilot light and lock- out reset button 21 Plugs for electrical wiring...
FIRING RATES (A) The burner output must be selected within the area of the adjacent diagrams. Attention the FIRING RATE value range has been obtained considering an ambient temperature of 20 °C, and an atmospheric pressure of 1013 mbar (approx. 0 m a.s.l.) and with the combustion head adjusted as shown on page 9.
• Natural gas G 20 PCI 9.45 kWh/Sm 100 1,0 • Pressure of the gas at an output of 250 kW, from 125 1,4 the table RS 34/1 MZ, column 1 =6.9 mbar • Pressure in combustion chamber = 2 mbar...
Any other position could compromise the correct working of the appliance. Installation 5 is forbidden, for safety reasons. RS 34/1 MZ BOILER PLATE (B) RS 44/1 MZ Pierce the closing plate of the combustion chamber, as in (B). The position of the threaded...
COMBUSTION HEAD SETTING Installation operations are now at the stage where the blast tube and sleeve are secured to the boiler as shown in fig. (A). It is therefore par- ticularly easy to adjust the combustion 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 the 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.
ADJUSTMENTS BEFORE FIRST FIRING MIN GAS PRESSURE SWITCH AIR PRESSURE SWITCH ATTENTION THE FIRST FIRING MUST BE CARRIED OUT BY QUALIFIED PERSONNEL WITH THE RIGHT INSTRUMENTS. Adjustment of the combustion head, and air and gas deliveries has been illustrated on page 9. In addition, the following adjustments must also be made: open manual valves up-line from the gas...
BURNER CALIBRATION The optimum calibration of the burner requires an analysis of the exhaust gases at the boiler outlet. Adjust successively: 1 - Maximum output; 2 - Air pressure switch; 3 - Minimum gas pressure switch. DETERMINATION OF OUTPUT UPON FIR- ING (MINIMUM) According to the regulation EN 676.
Note AIR PRESSURE SWITCH 4)(A)p. 4 Once you have finished adjusting maximum out- put, check firing once again: noise emission at this stage must be identical to the following stage of operation. If you notice any sign of pul- sations, reduce the firing stage delivery. 2 - AIR PRESSURE SWITCH (A) Adjust the air pressure switch after having per- formed all other burner adjustments with the air...
BURNER OPERATION STANDARD FIRING (n° = seconds from the moment 0) BURNER START-UP (A) • Control device TL closes. After about 3s: • 0 s : The control box starting cycle begins. • 2 s : Fan motor starts. The air gate valve is set on maximum adjustment output.
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;...
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BURNER START-UP PROGRAMME DIAGNOSTICS During start-up, the indications are explained in the following table: COLOUR CODE TABLE Sequences Colour code Pre-purging Firing phase Operation, flame OK Operation with weak flame signal Electrical supply lower than ~ 170V Lockout Extraneous light Key to layout: Yellow Green...
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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 wirings 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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