G22

Electrical connection

• Pre-fuse NH00 50 A gL (gG) or SLS E-50 A
• Supply line H07RN-F 5 x 6 mm2, up to 40 m in length for installation types B to G

Plate heat exchanger

Soldered stainless steel compact heat exchanger for separating the heating system from the CHP engine water circuit

Pollutant emissions

Mephisto G22 comes 50% below the German regulation emission limit

Combustion intake air

Space-air-dependent operating mode

Flue gas connection

• Flue gas conduit D80, fire resistance class B1 plastic pipe made of PP, permitted as a flue gas conduit for condensing heat generators with flue gas temperature up to 120 °C
• Flue gas temperature limited to max. 90 °C on thermostat
• Safety thermal cut-out set to 100 °C
• Recommended flue gas counter-pressure: 500 Pa; maximum flue gas counter pressure 800 Pa
• Flue gas flow rate: 75,8 mN³/h i.N. in normal state is equivalent to 98 m³/h bei T_{Flue gas} = 80 °C
• Maximum condensate quantity: 9,7 l/h

Flue gas heat exchanger

• Thermodynamically optimised cast aluminium-silicon heat exchanger
• Integrated catalytic converter

Utilisation of calorific value

• The flue gas temperature is a maximum of 15 K above the corresponding return temperature
• Calorific value used at a return temperature of about 55 °C and above

Engine

• Ford industrial gas engine
• Model: MSG 425
• 4-cylinder Otto engine, water-cooled
• Displacement: 2.489 cm³

Coupling

Maintenance-free, plug-in, flexible metal/plastic coupling to compensate for radial, axial and angular misalignment

Generator

• Four-pole asynchronous machine for parallel operation on the public grid
• Manufacturer: Weier GmbH
• Model: DASGM 160/L 4 water-cooled
• 3 × 400 V, 50 Hz
• Start-up current: about 60 A
• Rated current: 37,5 A
• cos φ: 0,77 (inductive)
• Rated power: 20 kW
• Rated speed: 1.538 min^-1

Compensation

Due to the requirements in German code of practice VDE-AR-N 4105:2018-11, operating own generating systems without reactive power compensation is only permitted in exceptional cases. A cos cos φ of 0.95 is achieved with the standard fixed compensation.

Controller

• Industrial computer with powerful MPC555 microcontroller, 32-bit power PC with FPU
• Fully automatic operating control
• Remote monitoring/operation via LAN or optional mobile data connection
• Interfaces to higher-level DDC controls: digital and analogue inputs and outputs; optional CAN bus, RK512, Modbus, LON bus, Profibus DP, BACnet/IP, IEC 104, Profinet

Housing

• Sturdy, easily removable, frameless full thermoacoustic enclosure
• Machine unit on four Asonator steel springs
• Optional base on two vibration dampers to isolate noise

Noise emissions

• Mean sound pressure level at 1 m distance ≤ 53,1 dB (A) as per DIN 45635-11
• Mean sound pressure level (standard equipment) at 1 m distance (45°) to chimney outlet ≤ 41,1 dB (A) as per DIN 45635-11

Third octave band spectra isolation can be provided on request

Dimensions

L × W × H in mm: 1.450 × 1.020 × 1.010 Without electrical enclosure.
Height with electrical enclosure: 1.660 mm

Required space

L × W × H in mm: 3.240 × 2.020 × 1.850, without sound insulation base. Height of sound insulation base: 250 mm.

Installation and base plans will be provided on request

Operating weight

810 kg

Delivery

• Machine unit, self-supporting: 1.300 mm × 800 mm, 485 kg
• Panelling with accessories on pallet: 1.600 mm x 1.200 mm, 315 kg