Webasto Thermo 350 Service Manual download pdf (Page 23)

Thermo 230 / 231 / 300 / 301 / 350 4 Technical Data

401

4. Technical Data

Where no threshold values are specified technical data

are understood to include standard tolerances for heater

units of ± 10% at ambient temperature of + 20 °C and at

nominal voltage.

Electrical components

Control unit, fan and circulation pump motors, solenoid

valve, igniter box, heater cartridge, nozzle block preheater

and timer are 24V components. Temperature limiter,

flame sensor, temperature sensor and switches are

voltage independent components.

NOTE

The allocation of circulation pumps to heater units must be

in accordance with coolant resistances.

Propellant

The suitable propellant is the Diesel fuel specified by the

vehicle manufacturer.

Only the type of fuel indicated on the identification plate

may be used. Also Diesel fuel with an addition of 5% PME

(vegetable oil methyl ester), class EL fuel oils (not fuel oil

L) or petroleum may be used if their quality is in accordan-

ce with the German standard.

A bad influence caused by additives is not known.

When using fuel out of the vehicle tank the information

about additives of the vehicle manufacturer must be ob-

served.

When using fuel out of a separate fuel tank and at tempe-

ratures below 0°C, winter Diesel fuel must be used.

The use of flow improvers is permitted.

Mixing ratio for separate fuel tank and temperature below

0°C.

Temperature Winter Diesel

fuel

Additive petrole-

um or petrol

0 °C to –20 °C 100 % –

–20 °C to –30 °C 70 % 30 %

or special low temperature

Diesel fuel

–30 °C to –40 °C special low temperature

Diesel fuel or 100 % petroleum

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Webasto Thermo 350 Service Manual Page 23

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