Installation & Maintenance Manual

Transcription

1 Installation & Maintenance Manual RGN 40/60 RGL 40/60 Gas Burner 11/12 Tel: +44 (0) Fax: +44 (0) Web:

2 Contents Overview... 3 General information / safety information... 3 Declaration of conformity... 3 Checking scope of delivery and connection data... 3 Operating instructions... 4 Instruction of operating personnel... 4 Maintenance and customer service... 4 Key for code designation... 4 Technical specifications... 4 Installation... 5 Installing flange and burner... 5 Installing gas assembly... 5 Service position... 5 Dimensions for checking the mixer unit... 5 Establishing electrical connections... 6 Function... 7 Control box MMI 810 Mod. 33, DMG Air flow setting, measurement "A"... 8 Compact gas unit... 9 Adjustable gas pressure switch (only on version KE 15)... 9 Start-up Adjustment tables Adjusting gas burner and boiler Calculation principle for gas burner adjustment Design Exploded view and parts list Service instructions/dimensions Measuring ionisation current Servicing air pressure monitor Servicing filter in compact unit Circuit diagram RGN40/60 (-N), with MMI Circuit diagram RGN40/60 (-N), with DMG Troubleshooting Burner overall dimensions / boiler connection dimensions Working ranges E G

3 Overview Overview General information / safety information The installation of a gas-fired system must conform to extensive regulations and requirements. It is therefore the duty of the installer to be familiar with all applicable regulations and requirements. Installation, startup and maintenance must be performed with utmost care. The burner must not be operated in rooms with high levels of air humidity (laundry rooms), dust or corrosive vapours. The boiler room must be ventilated accordingly with ventilation air. The Nu-Way RGN(L)40/60 series gas burners are suitable for burning natural gas or liquefied petroleum gas and comply with the European standard DIN EN 676. Caution! Improper installation, adjustment, modification, operation or maintenance may result in physical injury or damage to property/equipment. Read the instructions prior to use. This product must be installed in accordance with the valid regulations (e.g. DIN-VDE, DIN-DVGW). The design and degree of protection of the burner make it suitable for operation in enclosed rooms. Declaration of conformity We declare that the Nu-Way RGN(L)40/60 Series gas blower burners with the assigned product identification numbers: RGN(L)40/60 CE-0085 AP 0979 satisfy the basic requirements of the following directives: "Low Voltage Directive" according to 73/23/EEC in conjunction with DIN VDE 0700 Part 1 / Ed and DIN VDE 0722 / Ed Electromagnetic Compatibility" according to directive 89/336/EEC together with EN / Ed and EN / Ed "Gas Burning Installations Directive" according to Directive 90/396/EEC in conjunction with DIN EN 676 / Ed and DIN EN 437 / Ed "Efficiency Directive" according to Directive 92/42/EEC in conjunction with DIN EN 676/ Ed "Machine directive" in compliance with directive 98/37/EC These products conform to the design checked at the Department 0085 mentioned. Checking scope of delivery and connection data Before installing the Nu-Way gas burner, please check that all items included in the scope of delivery are present. Scope of delivery: Burner, sliding flange and gasket, 4 retaining screws, separate operating instructions, technical information, one 7-pin connector. Compact gas unit and gasket (see Overview, Page 9). The gas pipe must be designed to conform to the flow rate and the available gas flow pressure and routed with the lowest pressure loss over the shortest distance to the burner. The loss of gas pressure via the compact unit and the burner and the resistance on the fuel gas side of the heat generator must be less than the connection flow pressure. E G Caution! Observe throughflow direction of compact unit. 3

4 Overview Operating instructions The operating instructions together with this technical information leaflet must be displayed in a clearly visible position in the boiler room. It is essential to write the address of the nearest customer service centre in the operating instructions. Instruction of operating personnel Faults are often caused by operator error. The operating personnel must be properly instructed in how the burner works. In the event of recurring faults, Customer Service should be notified. Maintenance and customer service The complete system should be checked once a year for correct functioning and leaks by a representative of the manufacturer or other suitably qualified person. We accept no liability for consequential damage in cases of incorrect installation or repair, the fitting of nongenuine parts or where the equipment has been used for purposes for which it was not intended. Key for code designation RGN40(-N) Natural gas LL+E = -N or LPG = -F burner type burner series Technical specifications Burner type Technical data RGN40 / RGL40 RGN60 / RGL60 Min. burner output in kw Max. burner output in kw Min. boiler output in kw Max. boiler output in kw Gas type for natural gas LL + E = -N" / for LPG 3B/P = -F Max. gas pressure in mbar 70 Voltage Current consumption start max. / operation 4 1 N / PE ~50 Hz V 1.9 A / 0.8 A Electric motor power in W 90 ignition transformer 1x8 kv / 20 ma Control box Satronic MMI 810 / DMG 970 Weight in kg 14 Noise emission in db(a) 59 E G

5 Installation Installation Installing flange and burner When installing the sliding flange, only tighten screws 1 and 2 otherwise it will not be possible to secure the burner pipe with screw 3. Slide in the burner, adjust to furnace depth and tighten the screws in the following sequence: 3, 4, 5, raising the housing in the process. Important: Secure the sliding flange so that the clamping screw 3 is positioned at the top. Installation position KE Installing gas assembly Remove plastic protective plug. Install unions including accompanying seals. Observe installation position. Check connecting point of gas assembly with non-corrosive foaming agent for leaks and vent gas pipe. When venting gas, discharge safely to atmosphere with a hose. Comply with DVGW-TRGI 1986/96 Section 7, TRF 1988, DIN 4756 and local regulations. Service position Risk of injury by fan wheel during activation in service position. Release quick-release locks and detach base plate. Suspend base plate with retaining buttons in cross recesses of housing. Dimensions for checking the mixer unit The ignition electrodes are preset at the factory. The dimensions are specified for checking purposes. Centre of gas hole to flow plate Caution: Grubscrew determines the position of the holder and fully tightened. There is still slight play at the holder. Ignition electrode Black cable E G Electrode to centre of gas hole Ionisation rod. Red cable 5

6 Installation Establishing electrical connections Disconnect system from power supply. Main switch "OFF". Check polarity of all connectors. Wire connector unit in accordance with connection diagram. Lay flexible control line so that boiler door can still be swivelled. Attach cube connector to gas-pressure monitor connector A (grey) and to solenoid valves B (black) and secure with screw. Check correct wiring of wired connector unit X11 according to connection diagram. Attach 7-pin connector unit for boiler control (X11) to black-brown socket unit on burner (X12). Supply lead to 7-pin connector unit X11 must be protected with a min. 6.3 A slow-blowing or max. 10 A quick-blowing fuse. Connection diagram Male adapter X11 to boiler H11 Female adapter X12 on burner N N P11 B4 S3 Q1 N H13 F21 T2 T1 N PE PE L1 L1 F11 F3 X11 X12 Key: F11 F21 F3 Q1 H11 H 13 L1 PE P11 N External fuse Ext. temp. controller, 1st/2nd stages Ext. safety temperature limiter Main heating switch Ext. pilot lamp Ext. fault message lamp Phase Protective earth Service hour meter Neutral 6 E G

7 Function Function Control box MMI 810 Mod. 33 / DMG 970 Danger of death due to electric shocks! Disconnect electrical cable from power supply before carrying out any work on live parts! Fault elimination only by authorized skilled personnel! Unlocking may only be carried out by an authorised specialist. Control box MMI 810 program sequence for MMI 810 and DMG 970 Main switch Coloured program indicator Safety thermostat Control thermostat Control unit Motor/air-pressure monitor t w t 1 Servo drive SA1-F (RG1-L only) t ö Ignition transformer t z Stage 1 SV / SMS Ionisation t s Troubleshooting with the aid of the program display on MMI 810: (see also table Fault Diagnosis page 19) The coloured program indicator is retained in the event of a shutdown on faults. The colour of the area to which the black marker points indicates the nature of the shutdown on faults. Control box DMG 970 Fault cause diagnosis DMG 970 In the event of an error the LED lights up permanently. This light is interrupted every 10 secs. and a blink code emitted which provides information about the cause of the fault. From this results the following sequence which is repeated until the defect is acknowledged, i.e. the device is cleared of the fault. Following sequence: tö = opening time SA 2-F tw = waiting time, start t 1 = pre-ventilation time t s = safety time t z = ignition time, total Light phase Dark phase Blink code Dark phase lasts 10 secs. lasts 0.6 secs. lasts 1.2 secs. E G Fault message Blink code Cause of defect Fault shutdown safety time no flame detection within the safety time period Extraneous light fault Extraneous light during the monitored phase, possibly defective sensor Air controller in working position Air controller contact welded Air controller time-out Air controller does not close in a defined time span Air controller opens Air controller contact opens during start-up or operation Flame failure Flame failure signal in operation 7

8 Function Carry out the following checks after commissioning and each time after the burner has been serviced: Jumper gas pressure monitor: to do so, detach grey cube connector on KE 15 and remove cover. Close ball valve during operation with jumpered gas pressure monitor: device must go into fault mode immediately after flame failure. Start-up with closed ball valve and jumpered gas pressure monitor: device must go into fault mode after safety time has elapsed. After completion of check, reverse connection and re-establish original status. Check air pressure monitor contact: device goes into fault mode when silicone connecting hose is detached. Re-attach hose to connecting point "+". Bypass air pressure monitor before start-up: To so so connect terminals 5 and 7(on MMI 810) or terminals 4 and 7 (on DMG 970) in the lower part of the control box (see circuit diagrams page 17-18), burner must not go into operation! After completion of check,disconnect terminals and re-establish original status. Safety and switching functions A restart takes place in all cases following a mains power failure. An existing fault shutdown is retained. In the event of a flame failure during operation, the fuel supply is immediately switched off and the control box goes into fault mode within 1 sec. If a flame signal is effected during pre-aeration, a fault shutdown is effected immediately. The position of the air pressure monitor is continuously checked. There can be no start-up if it is not in its neutral position. If the working contact is not made during pre-aeration or re-opens, a fault shutdown is effected. In the event of a lack of air during operation, the air pressure monitor contact opens and the valves close immediately. The device goes into fault mode within 1 sec. Air flow setting, measurement "A" 1. Distance "A" 2. Locknut for air-restrictor setting Turn screw (3) clockwise: Air Turn screw (3) anticlockwise: Air + 8 E G

9 Function Compact gas unit The compact gas units for Nu-Way gas burners are preassembled and checked for leaks. Version KE 15: 1-stage precision pressure regulator with high control quality and adjustable starting gas pressure. Version KE 10: 1-stage precision pressure controller with high control quality and adjustable start gas pressure. The compact gas unit KE 10 is provided with a non-adjustable gas pressure switch (switching point 12 mbar falling). Technical data of compact gas unit Gas types: Natural gas, propane and butane, acc. to DIN EN 437/DIN EN 88 Inlet pressure: max. 360 (KE 15), max. 70 mbar (KE 10) min. 18 mbar Max. pressure drop: 50 mbar (supply pressure - output pressure) Ambient temperature: -10 C to +60 C Connecting flanges: Filter: Solenoid valves (T. A): Closing time: < 1 s Switching frequency:any Duty factor: 100% DF Degree of protection:ip 54 to IEC 529 The connecting flanges are secured with 4 screws. The flanges can be turned through 90 or 180 in each case. Pressure measuring points in inlet and in outlet. Nylon wire gauze with chopped-strands mat fleece Adjustable gas pressure switch (only on version KE 15) P w The gas pressure monitor serves to monitor the gas inlet pressure. The burner is shut down if the gas inlet pressure drops below the set minimum value (preset at factory to 12 mbar). The burner starts up automatically when the minimum pressure is exceeded. This setting should be retained. E G

10 Start-up Start-up The values given in the tables are only setting values for start-up. The system settings required in each case must be redefined if values such as boiler output, calorific value and altitude deviate. A correction is required in any case. Adjustment tables: RGN40 Burner output Boiler output at η = 92% Gas type Natural gas E: H in = 10.4 [kwh/m 3 ] Air flow measurement "A" Gas nozzle pressure [mbar] Gas flow [m 3 /h] [mm] E E E E E E Burner output Boiler output at η = 92% Gas type Natural gas LL: H i,n = 9.3 [kwh/m 3 ] Air flow measurement "A" Gas nozzle pressure [mbar] Gas flow [m 3 /h] [mm] LL LL LL LL LL LL RGL40 Boiler output RGN60 Boiler output bei η = 92% LPG 3B/P: H i,n = 25,8 [kwh/m 3 ] Gas nozzle pressure [mbar] Air flow measurement "A" Gas flow [m 3 /h] [mm] Burner output Boiler output at η = 92% Gas type Natural gas E: H in = 10.4 [kwh/m 3 ] Air flow measurement "A" Gas nozzle pressure [mbar] Gas flow [m 3 /h] [mm] E E E E E E E G

11 Start-up Burner output RGL60 Boiler output at η = 92% Gas type Natural gas E: H in = 10.4 [kwh/m 3 ] Air flow measurement "A" Gas nozzle pressure [mbar] Gas flow [m 3 /h] [mm] LL LL LL LL LL LL Burner output Boiler output bei η = 92% LPG 3B/P: H i,n = 25,8 [kwh/m 3 ] Gas nozzle pressure [mbar] Air flow measurement "A" Gas flow [m 3 /h] [mm] Adjusting gas burner and boiler The burner can be put into operation once the installation and assembly work has been completed. Measure inlet pressure with U-pipe pressure gauge at measuring point "A". max. 360 mbar (KE 15), max. 70 mbar (KE 10, static pressure) min. 18 mbar (flow pressure) on RGN...-N min. 35 mbar (flow pressure) on RGL...-F Burner and gas assembly are preset at factory to low output. This enables a soft burner start-up. Adjusting the burner to the desired nominal output in accordance with the adjustment tables on Pages 10, 11. To do so: Check gas working pressure with U-pipe pressure gauge at measuring point "B" outlet pressure. Caution! Minimum pressure difference (inlet-outlet pressure) 5 mbar! Adjust gas pressure and air flow measurement "A" according to adjustment tables, PP. 10, 11. Check exhaust gas values here without fail (CO, CO 2 or O 2 ). Exhaust gas values Natural gas LL+E LPG propane 3B/P O 2 content % CO 2 content 9-10% 11-12% Depending on the system, the setting values must be corrected. After completion of adjustment, check the setting data. Check the gas pressure monitor after start-up. To do so, close ball valve slowly; burner must shut down but not go into fault mode. E G

12 Start-up Single-stage gas burner with compact units: Installation of compact unit Installation position, vertical line: Installation position, horizontal line: Minimum distance to walling: as desired tilted up to max. 90 to left or right, not over head 20 mm KE 10 A D P G Gas supply pressure measuring point A (P inlet ) Gas nozzle pressure measuring point B (P outlet ) p S = starting gas pressure p G = main gas pressure B P S p w = switching point of gas pressure switch P W ST p L = screw cap starting gas pressure ST = screw cap D = gas volume adjustment (only on KE 10) KE 15 P S P G P W A P L B Presetting (only on KE 15): Locate relevant line of adjustment table according to boiler output and adopt setting values. Adjust dimension "A" according to specifications of adjustment table. Gas nozzle pressure 5 mbar: P G : adjust main gas pressure on min. P s : adjust starting gas pressure according to the specfications of the adjustment tables. Gas nozzle pressure > 5 mbar: P G :adjust main gas pressure according to the specifications of the adjustment tables. P s : starting gas pressure to approx % of main gas pressure, min. 4 mbar. Precision adjustment KE 10: Measure gas nozzle pressure at measuring point B. Increase main gas pressure via gas volume throttle D in direction "+ ("- decrease). Adjusting range approx mbar. Adapt dimension "A air volume adjustment (see adjustment tables pp ). If gas nozzle pressures are less than 3 mbar, turn the gas volume throttle D in direction "- until approx. 3 mbar is reached. Turn adjusting screw P G in direction "- and reduce the nozzle pressure. Only if gas nozzle pressures are greater than 14 mbar: Turn gas volume throttle D in direction "+ up to the stop. For further procedure see precision adjustment KE E G

13 Start-up Precision adjustment on KE 15: At measuring point B measure gas nozzle pressure. Gas nozzle pressure 5mbar: Start burner; if there is no flame formation, check adjustment. After approx. 10 sec. correct starting gas pressure ps according to adjustment table. Air setting measurement "A" Reduce if: Increase if: Exhaust gas values CO 2 too low CO 2 too high O 2 too high O 2 too low Gas nozzle pressure > 5mbar: Start burner, if there is no flame formation, check adjustment. If necessary adjust starting gas pressure P s higher (attention: always adjust P s P G ) After approx. 10 sec re-adjust main gas pressure P G according to adjustment table. Then adapt dimension "A" air flow setting (see table). Secure air setting with lock nut. Perform an exhaust gas analysis, paying special attention to eh CO emission. Seal off all measuring points. Calculation principle for gas burner adjustment The values given in the tables are setting values for start-up. The necessary system adjustment must be newly determined in each case. General: The calorofic value (H i,n ) of fuel gasses is usually given for normal atmospheric conditions (0 C, 1013 mbar). Natural gas type E H i,n = 10.4 kwh/m 3 Natural gas type LL H i,n = 9.3 kwh/m 3 Gas counters measure the volume of gas in the operational state. Specifying throughput: To allow correct setting of the heat generator load, the gas throughput must be determined in advance. Example: Height above sea level 230 m Atmospheric pressure B (according to table) 989 mbar Gas pressure P G at counter 20 mbar Gas temperature ϑ G 16 C Boiler rating Q n 100 kw Efficiency η K (assumed) 92% Calorific value H i,n 10.4 kwh/m 3 Gas flow in standard state (V n ) V n Q n kW = = η k Hin, 092, 10, 4 kwh = 3, 1 m h m 3 E G

14 Start-up Gas flow in operating state (V B ) V B V 31, m n h = = = 3, 3 m f 094, h Conversion factor (f) f = B + P G ϑ G Annual average air pressure Mean geodesic height of supplied region ASL [m] Annual average of air pressure from to (mbar) Key: Q n = boiler rating η K = efficiency [%] H i,n = lower standard calorific value [kwh/m 3 ] f = conversion factor B = barometric pressure [mbar] p G = gas pressure at gas counter [mbar] ϑ G = gas temperature at gas counter [ C] Flow measurement Determining flow duration at gas meter. Calculated flow duration in seconds t spec for a flow volume of 200 litres (corresponding to 0.2 m 3 ) for the example given above is: V B = 3,3 m 3 /h 02m, s h -- t soll = m 3 = V B h Gas flow setting 720m 3 s h m 3 = V B h 720m 3 s h = 218s 33, m3 h Measured flow duration in seconds [s] Greater than calculated flow duration t spec Less than calculated flow duration t spec Equal to calculated flow duration t spec Measures Increase gas flow Reduce gas flow Gas flow achieved 14 E G

15 Design Design Exploded view and parts list E G Seq. No. Designation PU Order No. 1 Flow plate with combination electrode for -N Flow plate with combination electrode for -F Combination electrode Ionisation cable with socket unit (red) Ignition cable with connector (black) Connector unit, 7-pin, green Socket unit 7-pin black-brown with cable Cable gland G4 for ignition cable Cable gland G6 for ionisation cable Ionisation cable with connector unit Lower section, control box Control box MMI Control box DMG Gas nozzle without flow plate with pressure-measuring adapter for RGN Gas nozzle without flow plate with pressure-measuring adapter for RGN Gas nozzle without flow plate with pressure-measuring adapter for RGL Gas nozzle without flow plate with pressure-measuring adapter for RGL Air pressure monitor DL2E Motor with flange up to 4/ Motor 230 V/50 Hz 90 W without flange Ignition transformer with connecting cable Positioning drive SA2-F with cable Burner cover Fan ø 120 x 42 mm Air flap assembly (plastic) Housing w. burner pipe (as of 4/91) and intake silencer Intake silencer Fastening unit Sliding flange Flange gasket not shown Gas pressure monitor not shown Control section KE 10 ½" not shown Control section KE 15 ½" not shown Control section KE 15 ½" with TC not shown Gasket for gas union R ½" not shown Ball valve ½"

16 Service instructions/dimensions Service instructions/dimensions To do so: Measuring ionisation current The ionisation current must be measured during burner start-up and maintenance or after a fault indication in the control box. Measurement of ionisation current shortly after burner start during: Maintenance Start-up Fault indication. Open plug connection between cable to control box and cable from ionisation electrode. Connect ammeter in series. Measuring range µa DC. l > 5 µa (MMI), > 2 µa (DMG) - o. k. l < 5 µa (MMI),< 2 µa (DMG) - Unsafe operation! - Clean burner pipe - Bend ionisation rod in flame area - If necessary, replace combination electrode - If necessary, reverse polarity on ignition transformer (induction current) - Eliminate moisture and deposits. Servicing air pressure monitor Detach silicone connecting hose and clean, check switching function. Replace air pressure monitor if switching function is no longer O.K. To do so: Disconnect burner from power supply (pull 7-pin connector X12). Screw off cover. Disconnect electrical connectors. Release retaining screws on motor. Reassemble in reverse order. + denotes the connecting point for pressure measurement! 16 E G

17 Service instructions/dimensions Circuit diagram RGN(L)40/60 with MMI 810 RGN(L)40/60 with DMG 970 Boiler control Burner Compact unit Boiler control AH High terminal A BH High terminal B B2 Ionization electrode E2 Air connection actuating drive F11 Ext. fuse boiler control 6.3 AT/max. 10 AF F21 Ext. temp. controller F3 Safety temperature limiter F4 Air pressure switch F51 Gas pressure switch H11 Ext. pilot lamp H13 Ext. lamp, fault indicator M1 Burner motor P11 Ext. service hour meter P21 Service hour meter burner (optional) Q1 Main heating switch S1 Satronic control box MMI 810 S1 Satronic control box DMG 970 S4 Push-button external fault clearance T3 Ignition transformer X11 Plug element boiler control X12 Socket element burner X52 Socket element gas pressure switch (grey) X62 Socket element solenoid valves (black) X51,X61 Compact unit connection X81 Single-pin connector block Y1 Solenoid valve Y3 Safety solenoid valve Colour key: bl = blue br = brown gr = grey rt = red sw = black vio = violet ws = white Burner Compact unit E G

18 Service instructions/dimensions Troubleshooting Defect determined: Burner motor does not start up Burner starts up and switches to fault mode before or after expiry of safety period Flame extinguishes during operation Burner motor starts up briefly. Control box goes over to fault again Control box resets automatically Display MMI 810 Blink code DMG 970 Cause: Remedy: as desired - Electric supply lead faulty Rectify faults in electrical installation as desired - Fuse faulty Replace as desired - Safety thermostat Unlock locked as desired - Temperature of controller setting is exceeded Renewed start attempt after temperature drop as desired - Control box faulty Replace as desired - Leak Rectify leak as desired - No gas Safeguard gas supply as desired - Gas pressure monitor faulty Replace compact unit as desired - Filter in compact unit dirty Clean or replace rotates continuously - Air pressure monitor not in idle Check air pressure switch (s. page 16) position blue-black/red Burner motor faulty Replace line blue-black/red line - No load at terminal 5 Check plug connection and current path of solenoid valve - Mains voltage < 187 V Rectify faults in electrical installation blue Ionisation message Solenoid valve leaky, replace KE blue-black/red Air pressure monitor does not See Page 16 line switch through during pre-ventilation yellow Ignition influencing of ionization See Page 16 monitor yellow Gas solenoid valve does not Replace compact unit open yellow Starting gas quantity set Increase starting gas quantity too low yellow No ignition Check ignition electrode and setting, ignition transformer and cable (see Page 5) yellow Phase and zero mixed up Connect connector unit in correct phase sequence yellow, red, Ionisation monitor faulty Check according to Page 16 green yellow, red, Air pressure switch opens See Page 16 green during operation yellow, red, green Gas nozzle dirty or faulty Replace gas nozzle yellow, red - No gas Safeguard gas supply green - Filter in compact unit soiled Clean or replace red or green Flame blow-off Incorrect burner setting (see Page 10 ff.) red or green Air pressure monitor contact Check/replace air pressure monitor opens (see Page 16) red or green Flame signal too weak Measure flame signal, check ionisation electrode(see Page 16) - random error Control box has not been faultcleared Unlock control box fault blink code - Air pressure switch not in Check air pressure switch (s. page 16) idle position - Intermittent fault (10 sec.) Intermittent (1-5 sec.) gas pressure fluctuations trigger gas pressure monitor. Safeguard gas supply. If necessary, lower starting point of gas pressure monitor. 18 E G

19 Service instructions/dimensions E G

20 Burner overall dimensions / boiler connection dimensions All dimensions in mm KE M ± 10 KE d 87 k Ø f min.155 min Pipe outside dia. d Hole circle dia. k Outside dia. f RGN40/60 RGL40/60 88 mm 150 mm 170 mm Working ranges Combustion-chamber resistance [mbar] 2,0 1,6 1,2 0,8 0,4 RGN40 RG1-Na Combustion-chamber resistance [mbar] 2,0 1,6 1,2 0,8 0,4 RGNL40 RG1-Fa Combustion-chamber resistance [mbar] 2,0 1,6 1,2 0,8 0,4 RRGN(L)60 G1 - Fb/Nb Burner output Burner output Burner output DVGW-checked working ranges as per DIN EN 676.

21 Enertech Limited, P O Box 1, Vines Lane Droitwich, Worcestershire, WR9 8NA Tel: +44 (0) Fax: +44 (0) info@nu-way.co.uk Web: