elco N6.2400 G-R, Руководство по эксплуатации

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10/2010 - Art. Nr. 4200 1030 6900A 16
Specifications for the design,
construction and safety features of gas
furnace systems in heating installations
are contained in DIN 4756 and TRD 412.
Heating installations with higher
operating pressures are subject to the
DVGW Worksheets G 460 and G 461.
The gas pipes must meet the
specifications of DVGW-TRGI in the
case of installations with operating
pressures up to 100 mbar or higher
than100 mbar.
Gas connection pressure
To ensure the proper functioning of the
burner, a minimum connection pressure
must be available.
The gas feed pipe to the burner must be
dimensioned according to the
throughput rate and the available
pressure.
The nominal bore (DN) of the gas valves
and instruments group must be selected
on the basis of
the resistance of the
boiler on its flue-gas side and the gas
pressure loss of the burner and
valves and instruments group.
Gas valves and instruments group
The gas valves and instruments group
may be connected directly to the gas
supply line.
Care should be taken to
install the valves and instruments in the
specified order and according to the
direction of flow (arrow on housing).
Prior to installation and operation, check
the valves and instruments and the
connecting elements for possible
accumulated dirt particles and foreign
matter.
To ensure proper conditions
for start-up, the distance between the
burner and the gas shut-off valve
must be as low as possible.
On completion of installation the gas
valves and instruments group must be
subjected to a leak test in accordance
with DVGW Worksheet G 600 and G
490 in the furnace system.
Gas valves and instruments group
Description
Gas valves and instruments group type
VGD
Technical data:
Types of gas:
Gas types of gas families 1, 2 and 3
according to DVGW Worksheet
G 260/1
Max. inlet pressure:
500 mbar
Electrical connection: 230-240V, 50Hz
Protection classification: IP 54
Ambient temperature:
-15°C to +50°C
Description
The gas valves and instruments groups
type VGD (screwed and flanged valves)
are provided for gas supply, main shut-
off, gas filtration and gas supply
pressure control and monitoring. They
can be used for all types of gases in the
gas families 1, 2 and 3 according to
Worksheet G 260/1. The valves and
instruments groups are constructed as
specified by EN 676 and DIN 4788, Part
2. All functional parts have been
checked by individual tests and
approved by a CE and DIN-DVGW
registration number.
A detailed description of the valves and
instruments used is contained in the
Technical Datasheet for the Gas Valves
and Instruments Groups Type VGD.
The premounted gas valves and
instruments group is subjected to a leak
test at the manufacturer's works.
For the installation and start-up of the
gas pipes take care to observe the rules
and regulations set forth by DVGW,
especially DVGW-TRGI and TRF.