Operating Instructions For TD/TAD4 Dual Fuel Burner
June 13 22 of 165 TD/TAD4 Manual Rev 4
With the gas isolation valve next to the burner closed, a pressure test should be carried out on the
main gas supply pipe work and all connections checked with a suitable, non corrosive leak
detection fluid.
If the installation is supplied with a gas pressure above 1 bar (14.5p.s.i.g.) and contains plant with a
heat input of more than 2MW, local authorities will generally ask for the fitting of remotely
operable fire valves. The national or other standards in countries to which the burners may be
exported must be identified and met.
2.2.2 Burner fitted with Siemens VGD40 gas valve
The Siemens gas valve is a heavy item
and will require two persons to lift it into
position and secure in place using bolts
provided.
8mm blue and black PVC pipes plus
fitting are supplied with the burner. The
blue line must be connected between the
“Air” connection on the SKP75 actuator
and the air pulse line situated on the top
flat of the burner hinge section. The black
line must be connected between the
“Combustion Chamber” connection on the
SKP75 and the furnace line connection
protruding through the mounting flange of
the burner.
Important:
The installer must install a 90° turn type
isolation ball valve next to or in close proximity
to the burner and capable of rapid operation.
The manual valve must be capable of operating at
a pressure equal to 1.5 times the maximum supply
pressure and where possible must be orientated in
such a way that when the valve closes the handle
must fall from the vertical to the horizontal. The
valve must have mechanical end stops to prevent
the ball valve from going below the 0° point or
above the 90° point.
The gas supply pipework must be adequately
supported to prevent undue stress on the burner
casing or the gas train components.
The Siemens gas valve has a built-in governor and
is suitable for gas pressures up to 500mBar.
Gas supplies greater than 500mbar must be
governed down to a suitable gas pressure below
500mbar using a CE approved high pressure gas governor. The gas governor or should be fitted as
per manufactures instructions, copies available on request.
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