MGN 2800N HP 8
S
ERVICES
&
S
ITE
C
ONDITIONS
Gas Supply
The gas supply pipework to the burner must be appropriate to local conditions and must be
constructed and installed in compliance with appropriate Codes and Standards. It shall be of
sufficient size to satisfy the pressure and volume flow requirements of the burner under all firing
conditions. Checks should be made to ensure that all meters and other components are
appropriately rated for the maximum gas flow rate anticipated.
It is essential that a 90° manual isolation valve is fitted upstream of the gas control train to allow the
burner to be isolated for maintenance. The size of this valve should not be less than that of the
burner control train in order to avoid any restriction in gas flow.
Gas Boosters
When a gas booster is used the gas pressure at the booster inlet must not fall below 10 mbar under
any conditions. A low gas pressure switch must be fitted on the upstream side of the booster to
prevent it starting if the supply pressure is insufficient. An additional pressure switch can be used to
monitor the pressure downstream of the booster to prevent the burner operating if the pressure is
insufficient.
The booster should be installed as near to the burner as possible. It should be positioned on a firm,
flat, horizontal surface using anti-vibration mountings. All connecting pipework should be well
supported and accurately positioned in order to avoid stressing the booster casing. The use of
flexible connectors, which reduce both pipework stresses and transmitted noise, is strongly
recommended. The gas supplier should be asked to recommend the size of pipework between the
meter and the booster to ensure that the required pressure and flow are available.
Installation
General
Check that the burner is appropriate for appliance rating. Detailed burner performance data is given
at the back of this handbook.
Fitting To The Appliance
If the burner is to be fitted to a new packaged unit, refer to the manufacturers recommendations.
If the burner is to be used with an existing appliance prepare the mounting flange as detailed in the
Burner And Components Identification
section. Ensure the joint between appliance and burner is
effectively sealed with the gasket provided. The flame tube should be flush with the inner face of the
appliance combustion chamber except where extensions are specified by the appliance manufacturer
(i.e. reverse flame boilers).
Electrical Power Supply
Connect a three phase 50 Hz electrical supply to the burner observing all applicable IEE Regulations.
Refer to the connection diagrams on pages 10 or the wiring diagram contained in the instruction pack
attached to the burners. If supplied as a packaged appliance/burner unit refer to the manufacturers
instructions.
Connect the external auxiliary controls by reference to the appropriate connection/wiring diagram.
