G20+
The classic unit in our product line. Proven track record of over a decade.
Technical data
Mephisto G20+
Net output (adjustable)
Net efficiency Electric
General
Gas connection
Heating connection
Residual head for net output: 4,7 mWS
Electrical connection
- Pre-fuse NH00 50 A gL (gG) or SLS E-50 A
- Supply line H07RN-F 5 x 16 mm² to 50 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 G20+ 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:: 69 mN³/h i.N. in normal state is equivalent to 89 m³/h at TFlue gas = 80 °C
- Maximum condensate quantity: 8,9 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
Motor
- 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 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