Features; Air Regulation; Controls & Operation; Fuel - Nu-Way XGN Series Handbook

F
EATURES
The XGN series sets new standards in efficient and
reliable operation, having been developed to the
current requirements of the UK and overseas markets.
Delivered ready to install with a pre-wired packaged
control system and plug-in gas train, this can be
arranged for left or right-hand entry.

Air Regulation

Air for combustion can be adjusted to give
maximum efficiency. A closed position air control
is incorporated as standard.
Controls & Operation
XGN burners are supplied for two-stage (high-low)
or modulating operation which is automatic, via
the burner controller. Flame supervision is by U V
cell.

Fuel

This handbook covers natural gas only. For other
requirements, refer to Nu-way Ltd.
G
ENERAL
This handbook is structured to enable the user to
proceed from the delivery of the burner to its use.
The conditions to be fulfilled and the controls and
adjustments to be used are dealt with in the
sequence that should be followed. The location
of all the necessary controls and adjustments to
undertake commissioning are illustrated and
supported by appropriate tabular matter and
graphs.
Routine maintenance, fault finding and spare parts
identification complete the handbook.
S & S
ERVICES ITE

Gas Supply

The gas supply pipework must be constructed and
installed in compliance with the appropriate Codes
and Standards, and comply with all local
conditions. It shall be of sufficient size to satisfy
the pressure and volume flow requirements of the
burner under all firing conditions.
A 90° manual isolation valve must be fitted
upstream of the gas control train to allow the
burner to be isolated for maintenance.
To avoid any restriction in gas flow the size of this
valve should not be less than that of the gas train.
Page 10
C
ONDITIONS

Flue and Chimney Requirements

The flue and chimney must be constructed and
installed in compliance with appropriate Codes
and Standards, and comply with all local
conditions. It shall be of sufficient size to satisfy
the volume of flue gases at all firing conditions.

Plant Room Ventilation

An adequate dust free supply of fresh air is required
for the burner at both high and low level in
accordance with the appropriate standards.

Existing Appliances

In preparing the appliance to receive the XGN
burner, a careful inspection should be made of its
condition after it has been cleaned thoroughly to
remove all adhering tars, scale and dirt.

Combustion Chamber Conditions

The combustion chamber draught must not exceed
0.25 mbar. If this figure is exceeded, then steps
should be taken to reduce it to this level.
P
ACKAGING
To safeguard against transit damage the burner may
be despatched partly assembled in either two or
three units.
A
SSEMBLY
If not already fitted, fit the hinged extension / flame
tube assembly to the burner body using the studs
provided, and ensure the gas inlet flange is at the
bottom.
Open the hinged extension and connect the
ignition cable to the electrode. Close hinged
extension.
Fit the 90° flanged elbow to the gas train mounting
flange, then the gas train to the elbow, using the
gaskets nuts and washers provided.
Ensure that the gaskets are seated correctly when
tightening the assembly.
Connect the four number-coded plugs from the
gas valves V1 and V2, the gas pressure switch and
the gas butterfly valve to the MBC sockets 2,3,8 &
14 respectively.
Do not force the plugs into the sockets. If difficulty
is encountered, check the coding to ensure correct
location.
XGN Handbook
F T
OR RANSIT