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General Information

Dear SPHEROS Customer,

We assume that the operation and function of your new heater will have been explained 
to you properly and to your complete satisfaction by the installing workshop / service 
outlet.  This owner's handbook is designed to give you a brief summary of how to use the 
Thermo 230 / Thermo 300 / Thermo 350 heaters.

Service and safety instructions

For  the Thermo  230  / Thermo  300  / Thermo  350  water  heaters  exist  type  approvals 
according to UNECE Regulations R10 (EMC) and R122 (heating systems).

For heater models Thermo 230 / 300 /350 designed for installation in rail vehicles, a 
design certification acc. to § 33 EBO (= Federal Railway Authority) has been issued with 
the following approval number: EBA32AZ3/0174/08.

The heaters must be installed as described in the attached installation instructions.

The  installation  must  be  checked  pursuant  to  the  statutory  regulations  governing 
installation work. Further details are given in the installation instructions.

The year in which the heater is used for the first time must be permanently marked on 
the heater's model plate by removing the inapplicable year numbers.

Ensure  that  the  existing shut-off  devices in  the  fuel  line  return are open  before  the 
heater is used for the first time.

When the coolant used in the vehicle's engine is renewed, after bleeding the vehicle's 
cooling system, give careful attention to bleeding the heater.

Top up the coolant as described in the instructions supplied by the vehicle manufacturer.

Check the openings for the combustion air intake and exhaust outlet and clean them if 
necessary.

When the heater is operated in rail vehicles, maintenance chart / test certificate item no. 
90 08722 is to be used.

Switch off the auxiliary heating system before refuelling.

The heater must 

not be operated:

Risk of fire, 

explosion 

and asphyxiation

!

The heater 

must

:

G

n

be operated using the fuel type shown on the model plate 

and the rated voltage shown on the model plate.

n

be shut down by removing the fuse in the event of extensive 

smoke development, unusual combustion noises or fuel 
odors.
The heater must not be used again until personnel trained 
by SPHEROS have examined it.

n

be operated at least once per month for 10 minutes when 

the engine is cold and with the blower at its lowest setting. 
At the latest when the cold weather season starts the heater 
must be inspected by an expert.

Liability claims:

n

Failure to follow the installation instructions and the notes 

contained therein will lead to all liability being refused by 
SPHEROS. The same applies if repairs are carried out 
incorrectly or with the use of parts other than genuine spare 
parts. This results to the invalidation of the general 
operating license / ECE Type approval of the heater.

n

Liability claims can only be made if the claimant has 

verifiably considered all the servicing and safety instructions.

The heater must 

not

:

D

n

be exposed to temperatures exceeding 110°C (storage 

temperature). If this temperature is exceeded the electronics 
system may suffer permanent damage.

n

be operated without at least 20% of a brand name anti-

freeze in the heating system water.

n

at filling stations and other refueling points.

n

if the heater or its exhaust outlet is in locations where 

inflammable vapors or dust may form (e.g. close to fuel, coal, 
wood dust or cereal storage facilities).

n

if the heater or its exhaust outlet is located close to 

inflammable materials for example dry grass and leaves, 
cartons, paper etc.

n

in enclosed areas (e.g. garages, hall without a suck off 

facility), not even if the digital timer or Tele Start is used.

n

If the exhaust outlet of the heater is partial or fully 

obstructed (e.g. by soil or snow, as it may occur while move 
the vehicle backwards).

Thermo

230/300/350

Operating and
service instructions

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