background image

BURNER GAS CONTROLS

Low Gas Pressure Switch

The low gas pressure switch is
located on the inlet side of the gas
valve. It is required to monitor inlet
gas pressure during burner operation.
The low gas pressure switch is wired
in series with the appliance
controlling instruments and in the
event of gas pressure failure will
cause the burner to effect a safety
shut down.

Isolate the burner and remove the
gas pressure switch cover. Switch
on the electrical supply and allow the
burner to establish main flame. Slowly
turn the adjustment dial on the gas
pressure switch clockwise until the
flame is extinguished and the burner
shuts down. Turn the dial slowly
anticlockwise one division at a time
until the burner restarts and
establishes main flame. Recheck the
performance and then turn the dial a
further two divisions anticlockwise.
Switch off the burner and replace the
gas pressure switch cover.

Gas Valve Multibloc - Single
Stage (On/Off)

The gas valve is of the multibloc type
incorporating  start rate, safety and
main valves and pressure governor.
Valve adjustments are detailed in the
Gas Controls and Adjustments
section.

SG10060602

Two Stage (High/Low)

The gas valve is of the multibloc type
incorporating  start rate, safety and two
stage valve and pressure governor.
Valve adjustments are detailed in the
Gas Controls and Adjustment section.

FLAME MONITOR

Probe

The flame probe (flame rectification
probe) is located on the burner head
and is required to supervise the safe
operation of the burner under all
working conditions.

UV

As an option burners can be fitted
with an  ultraviolet cell (UV) cell to
detect the presence of the flame.

BURNER OPERATING
SEQUENCE

Single Stage (On/Off) Burners

The operating sequence begins with
a pre-purge on full air, then start rate
gas flame which when proved allows
the burner to operate on main flame,
then to the “OFF” position after the
heat input is satisfied. The operation
is determined by demand of the
appliance control instruments.

GENERAL INSTRUCTIONS continued......

Two Stage (High/Low) Burners

The sequence begins with an air pre-
purge on full air, followed by start rate
gas flame which when proved allows
the burner to operate on High/Low/
Off. The operation is determined by
the demand of the appliance control
instruments.

FLUE AND CHIMNEY
REQUIREMENTS

The top of the Chimney/Flue should
be above all roofs within a radius of
10 metres.

Check that it is suitable for use with
gas fired appliances. Reference
should be made to Local Authority
and other regulations governing such
installations.

Ensure that the flue pipe from the
appliance does not protrude into the
chimney beyond the wall thickness
and is sealed throughout its run.

If more than one appliance is
connected to a common flue/
chimney, ensure that the cross
section of the flue/chimney is
adequate for the total volume of flue
gases from all the appliances.

PLANT ROOM VENTILATION

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

GAS SUPPLY

The gas supply to the burner must
be constructed and installed to
comply with local conditions and
appropriate Codes and Standards. It
should be of sufficient size to satisfy
the pressure/volume requirements of
the burner to ensure its operation.

It is essential that a 90° manual shut-
off is fitted upstream of the burner
gas train for the isolation of the burner
during servicing and maintenance.

The valve size must not be less than
the burner valve train or create
restriction to gas flow.

Summary of Contents for Selectos

Page 1: ...Installation Maintenance Manual Series SG fully automatic gas burners Selectos SG100 SG170 Gas Burner 11 12 Tel 44 0 1905 794331 Fax 44 0 1905 794017 Email info nu way co uk Web www nu way co uk...

Page 2: ...aught gas burner commissioning In the UK it is a legal requirement that anyone working on gas installation as defined in the Gas Safety Installation Use Regulations 1998 is CORGI registered The manufa...

Page 3: ...irDamper 6 Air Pressure Switch 7 FanShield 8 FanWheel 9 Air Adjustment 10 FanMotor 11 ElectricalConnection 12 FlameTube 13 FlameProbe 14 IgnitionElectrode 15 Head Adjustment Screw 16 Pressure Test Poi...

Page 4: ...192 60 275 113 139 114 ELECTRICALDATA Type Motor Ignition Transformer SG100 125W 2800rpm 230v 50Hz 0 65A Electronic 230 11000V SG170 125W 2800rpm 230v 50Hz 0 65A Electronic 230 11000V Type SG100 SG170...

Page 5: ...unit refer to the manufacturers recommendations If the burner is to be used with an existing appliance preparethemountingflange Ensure the joint between appliance and burner is effectively sealed with...

Page 6: ...ipping the ignition and flame detector leads Undo the lock nut clamping bolt Lift out the venturi flame ring assembly Undo the socket set screw Adjust the position of the assembly in the socket of the...

Page 7: ...Burners The operating sequence begins with a pre purge on full air then start rate gas flame which when proved allows the burner to operate on main flame then to the OFF position after the heat input...

Page 8: ...412 B07 Includes gas pressure governor safety two position main and pilot valves TWO STAGE ON OFF USING MAIN GAS IGNITION MULTIBLOC MB ZRDLE 405 412 B01 Includes gas pressure governor safety two main...

Page 9: ...This low voltage protection works not only during start up but also permanently during operation LOCK OUTIDENTIFICATION InthecaseofafailuretheLEDispermanentlyilluminated Every10secondstheillumination...

Page 10: ...d conduct the gas into atmosphere After purging the gas line re tighten the screw LEAKAGETESTING When making a leak test of the gas supply system the gas valve should beclosed Connectapressuregauge to...

Page 11: ...e adjuster clockwise if a heavy light up is encountered Repeat until a satisfactory setting is achieved B07 VALVE The adjuster acts to control the rate of change between high and low position Turn the...

Page 12: ...e power supply Replace UV cell switch on the power supply Reset lockout ROUTINE MAINTENANCE Switch off electrical supply and gas supply to the burner Combustion Air Fan Access can be gained to the com...

Page 13: ...__________ Burner Type ___________ Size ___________ Serial No ___________ Commissioning date _________________________________ Guarantee Expiry date _______________________________ Gas type __________...

Page 14: ...G10130501 BURNER SERVICE RECORD DATE DETAILS OF SERVICE SIGNATURE The details below are to be completed by the Servicing Engineer This sheet to be completed and signed following each service adjustmen...

Page 15: ...G10130501 BURNER SERVICE RECORD DATE DETAILS OF SERVICE SIGNATURE The details below are to be completed by the Servicing Engineer This sheet to be completed and signed following each service adjustmen...

Page 16: ...itch is in order otherwise the air pressure switch is faulty and must be renewed If the air pressure switch isn t in its made position the motor will start for approximately 2 to 3 seconds it then wil...

Page 17: ...y There is sufficient gas The control box is not faulty Incorrect Rotation Of Burner Motor Motor rotates clockwise viewed from the shaft end If the burner motor rotation is incorrect the single phase...

Page 18: ...Enertech Limited P O Box 1 Vines Lane Droitwich Worcestershire WR9 8NA Tel 44 0 1905 794331 Fax 44 0 1905 794017 Email info nu way co uk Web www nu way co uk...

Reviews: