BENSON variante 2 series, Инструкция пользователя

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The gas
supplier should
check that the
meter and
service
connection to
the heater are
capable of
delivering the
required volume
of gas, thereby
ensuring that
the minimum
burner pressure
can be
achieved.
Consideration
should be given
to the
pressure drop
on single and
multi heater
installations and
the effect they
may have on
other plant
sharing the
supply.
If it is necessary to fit a gas pressure
booster, the controls must include a low
pressure cut off switch which must be fitted
on the supply / inlet side of the booster. It is
also a requirement that the gas supplier is
advised prior to the installation or fitting of
the booster.
Each heater supply must be fitted with a
separate isolating cock positioned adjacent
to and upstream of the union which must be
sited outside the heater.
The isolating cock should be of the 90
0
turn
type and should be clearly marked OPEN /
CLOSED it should also be installed so as to
fall to the closed position
An approved gas jointing compound must be
used on all joints and unions and the system
purged and tested for soundness prior to
final connection
The connection to the heater can be made
by way of either an approved flexible
coupling or rigid connection . Threaded
connections must comply to ISO 288/1 or
ISO 7/1 further information concerning
accepted European practice is detailed in
BS EN1020 1998.
The diameter of the pipework from the
isolating cock to the burner must not be less