1 Introduction
NGW 300 / LGW 300 / GBW 300
102
ATTENTION
The gas pressure regulator must be replaced after
4 years of operation, for safety reasons. Failure to do
so can lead to leakage and thus an escape of gas, due
to aging of the sealing elements.
PLEASE NOTE
Oil and condensate which have accumulated in the gas
pressure regulator must be drained out in accordance with
section 8.
CAUTION
As the combustion noise of the heater is barely audible,
special care must be taken when working in the vicinity of
the heater. In any event, the heater should be secured to
prevent its being switched on unintentionally.
When there is a rather sustained period of smoke
emission, unusual combustion noises or a smell of gas,
the heater must be put out of operation by removal of the
fuse and may only be put back into service after an
inspection by staff trained by Spheros.
In the area where the heater is the temperature may not
exceed 100 °C (storage temperature). If this temperature
is exceeded, permanent damage can be done to the
electronic system.
Checking the status of the coolant should be done in
accordance with the process described in documentation
provided by car manufacturers. The water in the heater’s
heating circuit must contain at least 20 % brand name
antifreeze solution. In the event of overheating, if pure
water is used, due to its lower boiling point, this can lead
to a partial loss of cool water. In this case, coolant must be
replenished.
Additives in the heating circuit should not adversely affect
metal, plastic or rubber and should not form deposits.
The opening pressure in a car’s cooling system (normally
indicated on the radiator cap) must be between 0.4 and
2 bar of the maximum allowable working pressure.
1.5
Legal regulations for installation
PLEASE NOTE
These regulations are binding in the area subject to the
StVZO [Road Traffic Licensing Regulation] and should
also be observed in countries where there are no specific
provisions.
The installation of heaters must be performed in
accordance with installation instructions.
The year in which the heater was first put into operation
must be identified by the installer on its model plate by
striking out/removing the inapplicable years permanently.
The combustion air must not be taken from the interior of
the vehicle.
The opening of the exhaust pipe should be installed to
face upwards or to the side, or, if the exhaust pipe runs
under the floor of the vehicle, into the vicinity of the side
boundary of the driver’s cab or of the vehicle. Exhaust
gas pipes must be laid in such a way as to preclude the
expectation of exhaust gas fumes penetrating into the
interior of the vehicle. The function of parts of the vehicle
which are important for its operation must not be curtailed.
Accumulation of condensate in the exhaust pipe
absolutely must be removed. If necessary, a condensate
drain hole may be drilled.
Combustion air intake and exhaust outlet:
The openings of the combustion air intake and the exhaust
outlet must be designed in such a way as to prevent a
sphere with a diameter of 16 mm from passing through.
The heater’s electrical lines and switching and control
units must be configured so that their flawless operation
cannot be restricted under normal conditions.
Installing the heater in the driver’s cabin or the
passsenger compartment of a bus is not permitted.
The heater is not approved for installation in motor
vehicles used for the transportation of hazardous
materials.
Gas pipes must be laid in compliance with the VdTÜV,
TRG, ECE-R110. ECE-R67 and DVGW [German
Technical and Scientific Association for Gas and Water]
guidelines.
Gas pipes must be designed in such a way that torsion of
the vehicle, engine vibrations and the like have no effect
on their durability. They must be protected from
mechanical damage.
Gas pipes in buses must not be installed in the passenger
compartment or the driver’s cab. Parts that convey gas
must be configured so that entrances and exits are not in
danger of being obstructed in the event of a fire.
A regular check of the parts which carry gas, must be
carried out annually. Leaky or damaged parts must be
replaced by original replacement parts.
The particular operating status of the heater (at least on or
off) must be easily recogniable.