NGW 300 / LGW 300 / GBW 300
1 Introduction
101
1
Introduction
1.1
Content and purpose
This workshop manual serves as support for trained staff
in the repair of the NGW 300, LGW 300 und GBW 300
water heaters.
The heaters may only be operated with the kind of gas
indicated on the model plate and and with the relevant
kind of electrical connection.
1.2
Meaning of the headings in capital
letters.
In this manual, the words CAUTION, ATTENTION and
PLEASE NOTE have the following meaning:
CAUTION
This heading is used, if a failure to follow instructions and
procedures accurately or to follow instructions and
procedures at all can lead to injuries or to fatal accidents.
ATTENTION
This heading is used, if a failure to follow instructions and
procedures accurately or to follow instructions and
procedures at all can lead to the damaging of components.
PLEASE NOTE
This heading is used, if attention should be drawn to a
specific feature.
1.3
Further documentation to be used
This workshop manual contains all the necessary
information and instructions with respect to the repair of
the NGW 300, LGW 300 and GBW 300 water heaters.
The use of additional documentation can be required.
If necessary, installation and operating instructions can
also be used.
1.4
Safety information and regulations
Basically, general accident pevention provisions and the
valid industrial safety directions must be adhered to.
"General Safety Regulations" which exceed the
framework of these provisions are listed below. The
specific safety regulations which affect the present
manual are issued in the individual sections or procedures
with headings in capital letters.
1.4.1 General safety regulations
"General model approvals " with an official test stamp have
been issued by the Kraftfahrt Bundesamt [Federal Bureau
of Motor Vehicles and Drivers] for the NGW 300, LGW 300
and GBW 300 water heaters in the area governed by the
StVZO [Road Traffic Licensing Regulation]:
~ S 291 for the NGW 300 heater
~ S 313 for the LGW 300 heater
~ S 330 for the GBW heater
and a model approval in accordance with EC Directives
72/245/EEC (EMC) with authorisation no:
e1*72/245*95/54*1260*xx
Liability claims can only be asserted, if the claimant can
prove adherence to the the maintenance and safety
instructions.
Failure to follow the installation instructions and the
directions they contain will result in the exclusion of
liability on the part of Spheros. The same shall also apply
for repairs which are not conducted by experts or for those
where original replacement parts are not used. This will
result in the revocation of the general model approval for
the heater and thus the general operating permit for the
motor vehicle as well.
CAUTION
•
The heater may not be operated in enclosed spaces
(e.g. a garage or a workshop without an extraction
system) due to the danger of contamination and
suffocationr, and may not be operated with time
preselection.
•
Due to the risk of explosion, the heater must be
switched off at petrol stations and fuelling tanks.
•
Due to fire danger, the heater may not be operated in
the vicinity of combustible materials such as dry grass
and leaves, paper board, paper, etc.
ATTENTION
Where combustible vapours or dust can form (e.g. in
proximity to fuel, coal, sawdust and grain storage areas or
the like), the heater must be switched off.
The heaters must be operated only with the kind of gas
indicated on the model plate.
NGW 300 with CNG (natural gas)
LGW 300
with LPG (propane)
GBW 300 depending on the design with CNG
(natural gas) or LPG (propane)
The proportion of methane in the CNG (natural gas) must
amount to 95 % at least. If the proportion of methane is at
a still permissible 85-95 %, the CO
2
value must be
readjusted.
Withdrawal of gas in LPG (propane) sysrems must
happen in the gas phase.
