Technical documentation Commercial / industrial boilers up to 1017 kW Steel boilers MKS Cast iron boilers MK-1/MK-2 Gas-fired boilers NG-31E/NG-31ED 1

Steel boiler for pressure firing in accordance with DIN 4702/EN 303 and valid EC directives, for low temperature operation Steel boiler MKS Oil/gas-fired boilers from steel MKS 70-550 kW • High normative efficiency: up to 94% (Hi) / 89% (Hs) for the best possible energy utilisation • Large heat exchanger surfaces made of smooth tubing for condensationfree low-temperature operation • Stainless steel turbulators inserted into heat exchanger surfaces, low flue-gas temperatures • Fully water-jacketed combustion chamber, no sizzling and expansion noises • Full-width boiler door opening to left or...

Cast iron boiler for pressure firing in accordance with DIN 4702/EN 303 and valid EC directives, for low-temperature operation. Cast iron boiler MK-1 Oil/gas-fired boilers from cast iron MK-1 50-300 kW • High normative efficiency: up to 94% (Hi) / 89% (Hs) for the best possible energy utilisation • Boiler elements made of durable, corrosion-resistant cast-iron • Ideally proportioned combustion chamber • Cast iron boiler door opens left/right accross entire front, easy cleaning • Amply dimensioned thermal insulation • Powder-painted casing with supreme finish, easy to assemble • Six-year guarantee...

Cast iron boiler for pressure firing in accordance with DIN 4702/EN 303 and valid EC directives, for low-temperature operation. Cast iron boiler MK-2 Oil/gas-fired boilers from cast iron MK-2 320-1017 kW • Stainless steel turbulators integrated in flue-gas passes High normative efficiency: up to 94% 94% (Hi) / 89% (Hs) for the best possible energy utilisation • Boiler elements made of durable, corrosion-resistant cast-iron • Ideally proportioned combustion chamber • Cast iron boiler door opens left/right accross entire front, easy cleaning • Amply dimensioned thermal insulation • Powder-painted...

Gas-fired boiler in accordance with valid EC directives with intermitted ignition. Gas-fired boiler NG-31E NG-31E with atmospheric burner 40-110 kW • Gas-fired boiler in accordance with valid EC directives with intermittent ignition and atmospheric burner for natural gas E, natural gas LL and LPG propane/butane (category II2ELL3B/P) type (construction type) B11 bzw. B11BS (with flue-gas monitoring as accessory) Capacity range 40-110 kW • Ultra-low-pollutant combustion without flame cooling • DVGW-Quality label • High normative efficiency: up to 95% (Hi) / 86% (Hs) for the best possible energy...

Technical Data B D J A H G F C E Type NG-31E 70 90 kW 40,2 50,5 Output 1st burner stage 1) kW 42,5 53,5 Charge 1st burner stage 1) kW 70,0 90,0 Output 1st + 2nd burner stage 1) kW 75,6 97,0 Charge 1st + 2nd burner stage 1) Height/height without casing A mm 970/650 970/650 Width/width without casing B mm 1025/880 1195/1050 Depth/depth without casing C mm 750/740 750/740 Total height with control system D mm 1145 1145 Depth with draught security device E mm 1030 1030 Boiler return F mm 220 220 Gas connection G mm 550 550 Boiler flow H mm 605 605 Draught safeguard J mm 870 870 Flue-gas pipe internal...

Gas-fired boiler in accordance with valid EC directives with intermittent ignition. Gasheizkessel NG-31ED NG-31ED with atmospheric burner 40-220 kW • Gas-fired boiler in accordance with valid EC directives with intermittent ignition and atmospheric burner for natural gas E, natural gas LL und LPG propane/butane (category II22ELL3B/P) type (construction type) B11or B11BS (with flue-gas monitoring as accessory) Capacity range 40-220 kW • Ultra-low-pollutant combustion without flame cooling • DVGW-Quality label • High normative efficiency: up to 95% (Hi) / 86% (Hs) for the best possible energy utilisation...

Technical Data N B L K D J A H G F E M C Type NG-31ED kW Output 1st boiler + 1st burner stage 1) kW Charge 1st boiler + 1st burner stage 1) kW Output 1st + 2nd boiler and 1st + 2nd burner stage 1) Charge 1st +2nd boiler and 1st + 2nd burner stage 1) kW A mm Height/height without casing Width/width without casing B mm Depth/depth without casing C mm Height with control system D mm Depth with draught security device E mm Boiler return F mm Gas connection G mm Boiler flow H mm Draught safeguard J mm Flue-gas pipe connection K mm Total height L mm Depth with flue-gas collector M mm Total width N...

Control Unit R21 Control unit for boilers and boilers with cylinders for 2-stage and modulating burners. ON/OFF Fuse T 6,3A Illuminated indicator ring as status display e-Busconnection Illuminated ring Heating water temperatur selector Reset button Boiler temperature indicator DHW temperature selector Display Explanation Flashing green Standby (power supply ON, burner OFF) Constant green Heat demand: pump running, burner OFF Flashing yellow Emissions test mode Constant yellow Burner ON, flame steady Flashing red STB (overheat safety cutout) Fault DHW temperature selector For boilers in combination...

Control accessories Control unit R 21 BM programming module (incl. outside temperature sensor) as weather-compensated control thermostat BM programming module with wall mounting base (accessory) as room control thermostat Two-wire eBUS cable • Time programs for DHW and central heating • LCD with background illumination • Easy plain text guide through the menus • Control by rotary selector with key function • Four function keys for frequently used functions (heating, DHW, setback, help) • Installation either inside the boiler control unit or, as remote control, in a wall mounting base • Option...

Control accessories Solar module SM2 • Functions identical to SM1, additional control for a second collector field and one further cylinder possible • Esay configuration of the controller through selection of pre-defined system options Two-wire eBUS cable Radio clock (DCF 77 signal) with outside temperature sensor for automatic time adjustment. Radio clock (DCF 77 signal) for automatic time adjustment. External wireless sensor (only in conjunction with a receiver for external wireless sensor and remote control, part no. 27 44 209) Wireless receiver for wireless outside temperature sensor and...