Block diagram MB-VEF

Transcription

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2 0 0 Functional description Gas flow. If the valves and are closed, chamber a is under input pressure up to the double seat of valve.. A hole in the filter housing of MB-.../0 connects min. pressure switch with chamber a. If the input pressure applied to the pressure switch exceeds the incoming reference value, it switches through to the automatic burner control.. After release by the automatic burner control, valves and open. The gas flow through chambers a, b and c of the MultiBloc is then released. Operating method of valve-regulator combination on valve A regulator compensated for residual pressure is integrated in valve (pressure regulating part). Anchor is not connected with the valve plate unit. When it opens, the anchor pretensions the pressure spring and releases the valve plate unit. When the valve closes, the anchor acts directly on the valve plate unit. alves and are released at the same time. In closed position valve blocks the pressure chamber under working diaphragm M against input pressure P e in chamber a. Block diagram MB-EF Main valve Main valve Control valve Control valve M D Working diaphragm Throttling point Ratio setting Zero point correction a, b, c Pressure chambers in flow direction p Br Burner pressure p F Firing chamber pressure p amb Ambient pressure Blower pressure p L a b c M Gas-air ratio control part Pressure taps, gas train diagram MB-EF /0 D 7 pbr pf pamb pl,,,, G / screw plug 9 test nipples, 7, Pulse lines p L, p F, p Br The pressure under working diaphragm M is defined by a variable flow cross-section D. The comparison diaphragms for burner pressure p Br and blower pressure p L are interconnected via a rod. Moving the bearing point sets the ratio. Zero point correction acts on this rod. The ambient pressure p amb or the firing chamber pressure p F must be applied to the opposite side of the comparison diaphragms. Firing chamber pressure has a reducing effect on the burner pressure at a ratio of >. Changes resulting from the force equilibrium lead to a modification of the flow cross-section D downstream of valve. Pressure under the working diaphragm is re-adjusted and the valve plate unit changes the free crosssection. MB-EF 9 MB-EF /0 B MB-EF B0 7 Operating method of valve The anchor of valve is connected with the valve plate unit. When it opens, the anchor pretensions the pressure spring. alve opens completely and without delay. alve is activated by valve. In closed position, valve blocks the chamber under the working diaphragm M from the burner pressure. Closing function If the supply voltage to the solenoid coils is interrupted, the pressure spring closes the main valves within < s.

3 Specifications ominal diameters Flange with pipe threads as per ISO 7/ (DI 999) Max. operating pressure Input pressure ranges Guiding range Burner pressure range Pressure stage Media Ambient temperature Dirt trap unit Pressure switch Servo pressure regulator Ratio setting range Zero point correction Solenoid valve Solenoid valve Measuring Burner pressure monitor p Br Pulse and connection lines oltage/frequency Electrical connection Rating/power consumption Switch-on duration Protection type/interference suppression MB-EF B0, MB-EF 0 B0 MB-EF B0 Rp, /, /, Rp and their combinations 0 mbar MB- EF S0 p e : mbar to 00 mbar MB- EF S0 p e : 00 mbar to 0 mbar p L : 0. to 00 mbar p Br : 0. to 00 mbar P Gases of families,, and other neutral gaseous media - C to +70 C (Do not operate MB-EF below 0 C in liquid gas systems. Only suitable for gaseous liquid gas, liquid hydrocarbons destroy sealing materials) Sieve installed, suitable gas filter must be installed upstream for safety reasons. Filter housing with microfilter, two-layer for MB-EF /0. For MB-EF, insert gas filter, e.g. type GF 0/. Datasheet pre-mount filter Types GW A, ÜB A / B A to DI E may be attached. For further information, refer to Datasheets.0 and.07 Pressure Switches for DUGS Multiple Actuators Pressure regulator compensated for residual pressure, leakproof seal when switched off by means of valve as per DI E Class A and E 07-. Gas-air ratio control with adjustable ratio as well as zero point correction and firing chamber pressure connection. Ratio = p Br / p L 0.7 :... : ; other ratios on request Possible alve as per DI E Class A Group, fast closing, fast opening alve as per DI E Class A Group, fast closing, fast opening G / DI ISO, on inlet and outlet flange, on both sides downstream of dirt trap, on both sides between valves (pressure switch mounting can partly exclude measuring) downstream of valve, pressure switch...a mountable to adapter of MB-EF /0. G / connection as specified to DI ISO for burner pressure (p Br ; GAS), blower pressure (p L ; AIR), firing chamber pressure (p F ; combustion, atmosphere) Pulse and connection lines must be made of steel to P, D. Condensate of pulse and connection lines must not enter into fitting. Strictly follow the operating and mounting instructions. MB-EF /0 B0: 0-0 Hz, 0 AC, -% +0 % MB-EF B0: 0-0 Hz, 0 AC, -% +0 % Other preferred voltages:0 0 AC, DC, DC Plug connection as per DI E 70-0 for valves and pressure switches see type overview 00 % IP as per IEC 9 (E 09)/interference degree Materials of gas-wetted parts Housing Diaphragms, seals Solenoid drive aluminium diecasting BR basis, Silopren (silicon rubber) Steel, brass, aluminium Installation position ertical with solenoid pointing upward

4 Dimensions MB-EF /0 A 0 MB-EF = MB-EF 0 = MB-EF = 0 MB-EF 0 = 70 B MB-EF = MB-EF 0 = MB-EF 79 B A = Space requirement for cover of pressure switch B = Space requirement for changing solenoid 7 9 Type Rp Opening time P max. [A] I max. [A] ~(AC) 0 0 Weight [kg] MB-EF B0 Rp / < s 0 0,7,7 MB-EF 0 B0 Rp < s 90 0,7 7,9 MB-EF B0 Rp < s 0 0,,

5 0 0 Installation of pulse lines MB-EF / 0 / p e : gas input pressure S0: - 00 mbar S0: 00-0 mbar p L : blower pressure, air mbar / 0 min. x D D p F : firing chamber pressure -0 mbar +0 mbar or atmosphere p L max. = p L - p F = 00 mbar p Br max. = p Br - p F = 00 mbar p Br : Burner pressure, gas mbar M Pulse flange set Pulse line can be replaced by a pulse flange. The pulse flange permits an internal pulse tap p Br in connection with the output flange. min. x D D M Pulse lines Pulse lines,, must correspond to D ( mm dia.), P and be made of steel. Other materials of pulse lines are only permissible as per the type test together with the burner. EF. Route pulse lines so that no condensate can flow into the MB- Route pulse lines resistant to cracks and deformation. Keep pulse lines short. Selection of pulse flange and threaded flange Pulse flange set Order o. Ø [mm] Length [mm] Order o. Threaded flange Rp / Order o. Threaded flange Rp MB-EF / MB-EF / MB-EF 7 0

6 Flow diagram MB-EF B0 Rp /, with microfilter Recommended operating range p [mbar] 0 0 Basis + C, 0 mbar, trocken Based on + C, 0 mbar, dry Base + C, 0 mbar, sec Base + C, 0 mbar, secco n [m /h] Luft / Air / Aria dv =, n [m /h] Erdgas/atural gas/gaz aturel/gas metano dv = 0, Flow diagram MB-EF 0 B0 Rp, with microfilter Recommended operating range p [mbar] 0 0 Basis + C, 0 mbar, trocken Based on + C, 0 mbar, dry Base + C, 0 mbar, sec Base + C, 0 mbar, secco n [m /h] Luft / Air / Aria dv =, n [m /h] Erdgas/atural gas/gaz aturel/gas metano dv = 0,

7 Flow diagram MB-EF B0 Rp, with microfilter Recommended operating range p [mbar] 0 0 Basis + C, 0 mbar, trocken Based on + C, 0 mbar, dry Base + C, 0 mbar, sec Base + C, 0 mbar, secco n [m /h] Luft / Air / Aria dv =, n [m /h] Erdgas/atural gas/gaz aturel/gas metano dv = 0, f = Air density Density of gas used Type of gas Density [kg/m ] dv f gas used = Air x f at. gas City gas LPG Air

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