Nu-Way Selectos Instruction Manual

Installation & Maintenance Manual
Series SG fully automatic gas burners
Selectos SG100 & SG170
Gas Burner
11/12
Tel:[phone] Fax: [phone] Email: [email protected] Web: www.nu-way.co.uk

SG10010603
IMPORTANT - SAFETY
It is essential that the following
instructions and adjustments are
carried out by qualified engineers
that are experienced in forced
draught 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 manufacturer
cannot be held responsible for any
consequential damage, loss or
personal injury as a result of failure
to follow these instructions, or as a
result of misuse.

SG10020602
COMPONENT IDENTIFICATION
COMPONENTS
1. Reset Button
2. ControlBox
3. Transformer
4. MultiBlock
5. AirDamper
6. Air Pressure Switch
7. FanShield
8. FanWheel
9. AirAdjustment
10. FanMotor
11. ElectricalConnection
12. FlameTube
13. FlameProbe
14. IgnitionElectrode
15. HeadAdjustmentScrew
16. PressureTest Point
17. HeadClampingBolt
18. AdjustmentMarkings
19. Diffuser
15
17
14
13
12
16
19
18
4
8
10
11 9 7 6
5
321

TECHNICAL DATA
MODELSSG100/170
SG10030603
PERFORMANCEENVELOPE
*Calorificvalue:
Naturalgas10.7kW/m3
LPG 26kW/m3
** Dependingongastype and
availablepressure
OUTPUTRANGE
Theabovedimensionsaremaximummeasurements.Dependingonthecomponentsusedthesemayvary.
DIMENSIONS
323
1
9
2
6
0
275
113
139
1
1
4
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
Gas Connection ** 1/2" BSP 3/4" BSP
40 60 80 100 120 140 160
180
Burner Output (kW)
C
h
a
m
b
e
r
Resistance (mbar)
SG100 SG170
NG LPG NG LPG NG LPG
SG100 60-110 5.6 2.3 10.3 4.2 20 37
SG170 110-160 10.3 4.2 15.0 6.2 20 37
Type Volume (m³) Min Volume (m³) Max Supply Pressure
(mbar)
Gross Input
(kW) *

SG10040602
Ifthehinged extension/flametubeassembly isnotfitted to
thefancaseassembly,itshouldbefittedbeforemountingto
theapplicationusingthepinsprovided.Ensurethatthegas
inlet connection is at the bottom.
Once the burner is mounted open the hinged extension,
connect the flame probe and ignition cables. The terminal
endsare dissimilarand cannot be wrongly connected.
The gas train can now be fitted to the hinged extension.
•Ensure that the gaskets are seated correctly when
tighteningtheassembly.
•Iftheburneristobefittedtoanewpackagedunit,refer
tothemanufacturersrecommendations.
•If the burner is to be used with an existing appliance
preparethemountingflange.
•Ensurethe jointbetween appliance and burner is
effectivelysealedwiththegasketprovided.
140-190
155-210PCD
120Dia
1
3
.
0
m
m
2PLACES
1
2
.
0
m
m
4
P
L
A
C
E
S
MOUNTING THE BURNER
ELECTRICAL
EXTERNAL WIRING
ADDITIONAL CONNECTIONS FOR
HIGH/LOW VALVES
7 PIN BLACK/BROWN
WIELAND PLUG 4 PIN BROWN WIELAND PLUG
ON/OFF VALVES
ELECTRICALPOWERSUPPLY
Connect a single phase 50Hz electrical supply to the burner observing all applicable IEE Regulations. Refer to the
connection diagram below or the wiring diagram contained in the instruction pack supplied with the burner.
ELECTRICALCONNECTIONS
MOUNTINGFLANGEDETAIL

SG10050602
GENERAL INSTRUCTIONS
The SG100 & 170 burners are
supplied for On/Off or High/Low
operation and for use with single
phase electrical supply. Where an
instruction or information is
applicable to only one of the burner
types, single or two stage, then this
is indicated in the text.
This manual is structured to enable
theuser toproceed fromthe delivery
of the burner to its commissioning
and use.
The conditions to be fulfilled and the
controlsand adjustments tobe used
are dealt with in the sequence that
should be followed for the correct
assembly installation and use.
Commissioning procedures are
described and the location of
necessarycontrols andadjustments
to undertake these runs are
illustrated and supported by
appropriate tabular matter and
graphs.
Routine Maintenance and Fault
Finding complete the manual;
literatureon proprietarycomponents
isavailable onrequest.
SETTINGCOMBUSTIONHEAD
The venturi flame ring assembly is
adjustable longitudinally so that the
restriction between the air diffuser
and the throat of the flame tube
effectivelymeters the combustionair
and therefore the assembly should
be set to approximately the position
corresponding to the required gas
rate.
Method of Adjustment
Undo the two safety bolts of the
hinged extension.
Remove one hinge pin on the
opposite side to that which it is
required to swing the burner.
Unplug any electrical connections
that are restricting movement.
Swing the burner body away slowly,
at the same time unclipping the
ignitionand 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
inthesocket of thesupportingelbow
aligning the required scribed ring
against the end of the socket.
The positon is relative to the firing
rate of the burner, the graph below
showstherelation betweenthehead
setting and burner output.
Securethe assemblyand replacein
reverse order taking care that the
assembly sits squarely on the gas
inlet spigot and is squarely locked
in position by its clamping bolt, and
that the burner is swung back into
position the ignition and flame
detector leads are carefully clipped
back on their respective electrodes
(the terminal ends are dissimilar so
that they cannot be wrongly
connected).
BURNERAIRCONTROLS
The air for combustion is controlled
by an adjustable air flap located
inside the air inlet on the right hand
side of the burner viewed from the
rear.
Itspurpose is toregulate and control
thevolume ofcombustion airflowing
throughthe burner.
Onallburnerstheairadjustmentcan
be made with or without the cover
fitted with the use of an Allen key.
There is a visible scale to assist in
the setting of combustion air, it is
numberedbetween1and22.
Finalfineadjustmentmustbemade
withthecoveron.
Air Diffuser
The air diffuser is fitted to the front
end of the inner assembly and
located within the flame tube.
Itcontrols thevolume ofcombustion
airand creates apressure drop over
theburner head toensure goodfuel/
air mixing and flame stability.
Burner Output (kW)
H
e
a
d
S
e
t
t
i
n
g
HeadSetting
SG100
C
h
a
m
b
e
r
Resistance (mbar)
SG170
VENTURIHEADSETTING

BURNERGASCONTROLS
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
gaspressureduringburneroperation.
Thelow gas pressureswitch iswired
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
ontheelectricalsupplyandallowthe
burnertoestablishmainflame.Slowly
turn the adjustment dial on the gas
pressure switch clockwise until the
flameisextinguishedandtheburner
shuts down. Turn the dial slowly
anticlockwiseone division ata time
until the burner restarts and
establishesmainflame.Recheckthe
performanceandthenturnthediala
further two divisions anticlockwise.
Switchofftheburnerandreplacethe
gas pressure switch cover.
Gas Valve Multibloc - Single
Stage (On/Off)
Thegasvalveisofthemultibloctype
incorporating start rate, safety and
main valves and pressure governor.
Valveadjustmentsaredetailedinthe
Gas Controls and Adjustments
section.
SG10060602
Two Stage (High/Low)
Thegasvalveisofthemultibloctype
incorporating startrate,safetyandtwo
stage valve and pressure governor.
Valveadjustmentsaredetailedinthe
GasControlsandAdjustmentsection.
FLAMEMONITOR
Probe
Theflame probe (flame rectification
probe)is locatedon theburner 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.
BURNEROPERATING
SEQUENCE
Single Stage (On/Off) Burners
Theoperating sequence beginswith
apre-purgeon fullair,then startrate
gasflame which whenproved allows
theburnerto operate onmainflame,
then to the “OFF” position after the
heatinput issatisfied. Theoperation
is determined by demand of the
appliance control instruments.
GENERAL INSTRUCTIONS continued......
Two Stage (High/Low) Burners
Thesequencebeginswithanair pre-
purgeonfullair,followedbystart rate
gasflame which whenproved allows
the burner to operate on High/Low/
Off. The operation is determined by
the demand of the appliance control
instruments.
FLUEANDCHIMNEY
REQUIREMENTS
Thetop of theChimney/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
andother regulations governingsuch
installations.
Ensure that the flue pipe from the
appliancedoes notprotrude intothe
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
adequatefor thetotal volumeof flue
gases from all the appliances.
PLANT ROOM VENTILATION
An adequate supply of dust free,
fresh air is required for the burner at
bothhighandlowlevelinaccordance
with the appropriate standards.
GAS SUPPLY
The gas supply to the burner must
be constructed and installed to
comply with local conditions and
appropriateCodes and Standards. It
should be of sufficient size to satisfy
thepressure/volumerequirements of
the burner to ensure its operation.
Itisessentialthata90°manual shut-
off is fitted upstream of the burner
gastrainfortheisolationoftheburner
duringservicing andmaintenance.
Thevalvesize mustnotbe lessthan
the burner valve train or create
restriction to gas flow.

BURNER GAS CONTROLS & ADJUSTMENTS
SINGLE STAGE (ON/OFF) USING PILOT GAS - MULTIBLOC MB-DLE 405-412 B07
Includesgas pressure governor, safety, main andstartgas valves.
SINGLE STAGE (ON/OFF) MAIN GAS IGNITION - MULTIBLOC MB-DLE 405-412 B01
Containsgaspressure governor, safety,andmain gasvalves.
ADJUSTMENTS
A Governoradjustment (mainand pilot). Turn clockwise to increase
pressure.Range 4-20 mbar.
B Start gas rate (B07 valve only). Turn anticlockwise to increase
and clockwise to decrease rate.
C Mainvalve. Fast initiallift adjuster.
D Main gas adjustment. Slacken cheesehead screw, and turn the
fluted knob anticlockwise to open, clockwise to close.
E Lowgas pressure switch (Optional).
F Upstreamtestpoint.
G Downstreamtestpoint.
TWO STAGE (HIGH/LOW) USING PILOT GAS - MULTBLOC MB-ZRDLE 405-412 B07
Includesgas pressuregovernor, safety,two positionmain andpilot valves.
TWO STAGE (ON/OFF) USING MAIN GAS IGNITION - MULTIBLOC MB-ZRDLE 405-412 B01
Includesgas pressuregovernor, safety,two mainand startgas valves.
ADJUSTMENTS
A Governoradjustment formain flame.Turn clockwiseto increase
pressure.Range 3 -20 mbar.
B Start gas rate (B07 valve only). Turn anticlockwise to increase and
clockwise to decrease rate.
C Main valve - first and second stage - fast initial lift adjuster.
D Highflame throughput adjustment.Slacken offlocking screw, turn
anticlockwise to increase and clockwise to decrease rate.
E Low flame throughput adjustment, as in D.
F Lowpressure gas switch (Optional).
G Upstreamtestpoint.
H Downstreamtestpoint.
GASMULTIBLOCKSCHEMATIC
AD
EFBGC
AEC
B
H
D
G
F
1 3
V1 V2
V3
5
2
4
V1 - Valve 1
V2 - Valve 2 - Single Stage (MB-D) or Two Stage(MB-
Z)
V3 - Pilot Valve (B07 Only)
1 - Pressure Switch (Optional)
2 - Regulator
3 - Restrictor
4 - Filter
5 - Inlet connection
SG10070501

SG10080501
CONTROL BOX
DMG970
INTRODUCTION
TheburnercontrolboxDMG970controlsandsupervisesforceddraughtburnersforgasanddualfuel.
Themicroprocessorprogrammingsequenceensuresextremelystabletimingsindependentofvoltagevariations,
ambient temperature and/or switch-on cycles. The built-in information system not only provides a continuous
monitoring of the actual state of the box (including monitoring of the start-up phase) but also informs about the
possible cause of a lockout. The lockout cause is stored in such a way that it can be retrieved even after a power
failure.
The control box is designed for maximum safety in case of fluctuations in the voltage supply. If the mains voltage
drops below the permitted level, operation is interrupted and the control box automatically prevents the start
sequencefrombeingrepeated.Inthisway,thesafetyofthesystemisnotputatriskbyadropinthemainsvoltage.
Thislow-voltageprotectionworksnotonlyduringstart-upbutalsopermanentlyduringoperation.
LOCK-OUTIDENTIFICATION
InthecaseofafailuretheLEDispermanentlyilluminated.Every10secondstheilluminationisinterruptedbyaflash
codewhichindicatesthe cause oftheerror.The following sequenceisperformedand is thenrepeatedaslongas
the unit is not reset.
FLASHCODES
ERROR MESSAGE POSSIBLE FAULT
within lock out safety time no
flame establishment
stray light during startup
detector may be faulty
loss of flame
stray light
air pressure switch opened
during operation
loss of flame during operation
air pressure switch contact
welded
air pressure switch timeout air pressure switch does not
close within specified time
FLASH CODE
air pressure switch opened
lock out safety time
air pressure switch closed
illuminated phase dark phase Flash-Code dark phase
for 10 sec for 0.6 sec for 1.2 sec
SEQUENCETIMINGS
tlw Max. reaction time for air
proving switch 60
tv1 Supervised pre-purge time 40
tvz Pre-ignition time 3
tz Ignition time total 5.5
ts Safety time 3
tv2 Delay 2nd-stage 12.5
SEGMENT OPERATION DURATION (S)
tlw
tv1
tvz
tz ts
tv2

ThecapacityofSelectosSG burners
using natural gas has been
determined at a minimum supply
pressureof17.8mbar(max40mbar).
ForLPG the supplypressure should
bebetween 25mbar and40mbar.
These burners will operate
satisfactorily on gas supply
pressures lower than those quoted
above, but burner capacity will be
reduced accordingly.
Any LPG high pressure regulator
fitted must be equiped with over
pressureshut offprotection.
Turnoffthegas supplyatthemanual
shut off valve upstream of the gas
valveinlet.
Fitan approved pressuremeasuring
instrument at the pressure test point
ontheinletof thegasMultiBloc.Turn
on the gas supply. Check gas
pressure, this will record static
pressure which will be higher than
running pressure, which should not
beless than17.8mbar whenrunning
on main flame.
INNERASSEMBLY
Ensure that the ignition electrode
and ionisation probe are correctly
adjusted. Correct positioning is
shown on the Component
Identification page.
Ensure that the head has been
positionedaccordingtothegasrate.
GASTYPE
Ensurethattheburnerheadiscorrect
forthetypeofgastobeused.Check
theburnerdataplate.
PURGING
The gas line is purged by loosening
the screw on the inlet pressure test
nipple. Connect a plastic hose and
conduct the gas into atmosphere.
Afterpurgingthe gaslinere-tighten
the screw.
LEAKAGETESTING
When making a leak test of the gas
supplysystemthegasvalveshould
beclosed.Connectapressuregauge
to the test nipple on the gas valve.
The test pressure in the system
should be 1.5 x maximum inlet
pressure or minimum 150 mbar. If
there is any leakage, locate the
sourcebymeansofsoapywaterora
leakdetectionspray.Aftertightening
repeat the test
DRYRUN
Turn off the electricity supply to the
burner. Close the manual gas shut-
offvalve.
Topreventthegaspressure(iffitted)
switchfromlockingout,removethe
coverandfitatemporarylink.
Adjust the thermostats to call for
heat and switch on the electrical
supplytotheburner,thepre-purging
periodwillbegin(24-40seconds).At
theendofthisperiodthepre-ignition
period starts (3 seconds).
Thegasvalveisenergizedandopens
andtheflamewouldbeestablished.
At the end of the safety time (3 to 5
seconds) the control box will go to
lockout. The gas valve will be de-
energised and the motor will stop
running.Thedryrunis complete.
Ensure to remove the link from the
gas pressure switch after the test is
finished.
PRE-COMMISSIONING CHECKS
IMPORTANT
Aftereachadjustment, the gasflow rate andfluegas analysis shouldbe checked.
ALWAYS
Useapprovedtest equipment(Continuallymonitoringelectronic equipmentisrecommended).
NEVER
Relyona visualinspection oftheflame asa guide tocombustion quality.
SG10090501

COMMISSIONING
Reference should be made to the
BurnerGasControlsandAdjustment
sectionofthismanualforidentification
and location of the following
adjustments.
None of these adjustments should
be made in isolation. One
adjustment will have an effect on
another.It is thereforeessential that
the combustion quality and gas
throughput are monitored during the
commissioning procedure
PILOTBYPASSADJUSTMENT
(B07VALVEONLY)
Thebypassvalveopensatthesame
time as the first valve. Ignition gas
flowissetbyusingbypassrestrictor.
Turn anticlockwise to increase and
clockwise to decrease rate.
Ifthegovernorpressureissettoolow
therewillbeinsufficientpressurefor
the pilot bypass to operate.
MAIN GAS GOVERNOR
Withascrewdriverturnthe adjusting
screw to its minimum position then
turn back four complete revolutions.
Thiswill givea reduced gasflow rate
to enable further adjustments to
commence.
Note: Should the burner lockout
when establishing start and main
flames then the probable cause is
air or inert gas in the gas line. This
can be removed by purging the line
through the pressure test points
located on the gas MultiBloc.
Alternatively, there may be
insufficient pressure on the gas
governor.
SETTINGMAINFLAMEGASRATE
Switch the burner on and allow it to
establishmain flame.
Checkthe gas throughputwith agas
meter or with other approved
measuring instrument.
With a screwdriver slowly adjust the
gas governor to increase the gas
volumethroughtheburnertotherate
requiredforthe appliance.
Ensure that other appliances served
bythesamemeterareisolated when
gasthroughputs are beingadjusted.
Withthegasflowrateformainflame
setandtheburnerrunningwith stable
flame, the flue gases can now be
checkedforCO2andO2withsuitable
combustion testing instruments.
Figures of 9-10% CO2and 3-5% O2
areacceptable. Forreasons ofsafety
theCO(carbonmonoxide)shouldbe
checkedand shouldnot exceed100
ppm.
To achieve good combustion
efficiency or if the CO content is
exceeded,adjustmentsto theairand
gassettings can nowbe madewhile
theburner is runningon main flame.
ADJUSTING THE MAIN VALVE
FAST INITIAL LIFT.
B01 VALVE - The adjuster actsas a
dampertothemainvalve, controlling
therateofopeningafterinitiallift.This
adjustment is used to reduce the
volume of gas that the valve passes
during the ignition safety phase.
Switch off and restart the burner.
Notethequality ofthelight upduring
the ignition stage. If the light up is
weak, then increase the amount of
fast initial lift by turning the adjuster
anticlockwise. Turn the 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
highandlowposition.Turnthe valve
clockwise to slow down the rate and
anticlockwiseto increase therate of
change.
SETTINGLOWFLAMERATE
HIGH/LOWBURNER
(MB-ZRDLEVALVESONLY)
Low flame gas rate is achieved by
adjusting the low gas setting of the
twopositionsolenoidvalveonthegas
MultiBloc.
Turn the low gas rate adjusting ring
on the gas MultiBloc to achieve low
flame throughput (refer to Gas
Controls and Adjustments). Care
must be taken so as not to exceed
the turndown ratio for the burner
modelbeing commissioned.
AIR PRESSURE SWITCH
Located on the right side of the
burner casing viewed from the rear,
it is required to prove adequate air
flow throughout the burner operating
cycle. Flow failure at any stage fol-
lowing the first few seconds of pre-
purge will lockout the burner
To set the Air Pressure Switch :-
Switchoff the electricalsupply to the
burner.
Remove the air pressure switch
cover. Fit a manometer to the pres-
sure switch to check the actual air
pressureagainst the pressure switch
dial setting.
Switch on the electrical supply and
allow two stage burners to establish
low flame and single stage burners
to establish main flame.
Slowly turn the adjusting dial clock-
wise until the flame is extinguished.
The burner will go to lockout.
Turn the dial one division
anticlockwise and reset burner
lockout.Theburnerwillthencontinue
throughits cycle untileither the start
rateflameisestablishedortheburner
goes to its lockout position.
If the burner goes to lockout repeat
theprocedure onceper burnercycle
until the start rate flame is
established.
Allowtheburnertocycletolowflame
(two stage) and main flame (single
stage)andthenturntheadjustingdial
a further two divisions anticlockwise.
Switchoff the electricalsupply to the
burner, replace the air pressure
switch cover and remove the
manometer.
CHECK FLAME SIGNAL
With the burner isolated, connect in
series with the ionisation probe and
the gas burner control a DC
Ammeter. Switch on the burner.
Once the flame is established, the
microammeter will record the signal
strength. (Check high and low flame
ifapplicable).Aminimumreading of
1.5µA will give reliable operating
conditions.
Readingsbelowthisfiguremay arise
from poor burner adjustment. Check
andreset if foundto be necessaryor
refer to the section inFault Finding.
Switch off the power to the burner,
remove the microammeter, and
reconnect the ionisation probe.
Checkthat allcovers tocomponents
and locking devices are properly
secured.
Check that the appliance control
instruments are set to safe limits.
Commissioning is now complete.
SG10100501

ROUTINE SAFETY CHECKS
TOBE CARRIED OUT ONLY BYQUALIFIED AND EXPERIENCED PERSONNEL.
Check that the plant room is ventilated at all times.
Frequently inspect the air inlet of the burner and ensure that there are no obstructions to air flow.
FLAMEDETECTIONSYSTEM
Flame Probe (Flame Rectification Rod)
Switch off the electrical supply to the burner. Break the flame signal circuit by removing any connection to the
ionisationprobe.
Switch on the electrical supply. Check that the burner locks out at the end of the ignition cycle.
Switch off the electrical supply. Complete flame signal check circuit.
Switch on the electrical supply. Reset lockout.
UV (Ultra-Violet) Cell
Switch off the power supply to the burner. Remove the UV cell from the burner casing and cover the quartz glass
envelope to exclude any light. Do not touch the quartz glass with fingers.
Switchoffthe powersupply to the burner. Remove the UVcell from the burner casing.Switch onthe power supply
andduring the pre-purgeperiod showthe UV cell to anexternal light source. The burnershould go immediately to
lockout. Reset lockout
Switch on the power supply. Check that the burner locks out at the end of the ignition cycle. Switch off the 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
Accesscan begained to the combustion
airfan byopening thefan case as shown
inthe diagram.
Clean the blades regularly with a stiff
brush.Careshouldbetakentoavoiddam-
aging the fan blades. Check that the air
inlet into the fan is clean.
When re-assembling the fan casing en-
sure that the gasket is correctly located.
Inner Assembly
Openthe hinged extension as follows:-
RemovetheMultiBlocplugfromitssocket
on the control package.
Removethe safety bolts from thehinged extension. Remove the pinappropriate tothe direction in which thehead
is to be opened.
Open the hinged extension, disconnect the ignition electrode H.T. lead and if fitted the flame probe lead.
Remove the locking screw securing the inner assembly gas pipe to its manifold. Carefully withdraw the inner
assemblyfrom the hingedextension.
Air Diffuser And Gas Nozzle
Clean using a stiff brush.
Ignition Electrode
Clean and check the electrode is not cracked or worn. Renew if necessary.
Check the settings of the ignition electrode and flame rectification probe, and reset if necessary. Replace all
components and covers, and secure all fittings. The burner is now ready for operation. Switch on the electricity
supply and gas supply to the burner.
SG10110501

SG10120501
GAS COMMISSIONING SHEET
The details below are to be completed by the Commissioning Engineer
Installer’s Name : _________________________________________________________
Address :________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
Site Address : ____________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
Appliance : Type :___________ Size : ___________ Serial No. : ___________
Burner : Type :___________ Size : ___________ Serial No. : ___________
Commissioning date : _________________________________
Guarantee Expiry date : _______________________________
Gas type : __________________________________________
Gas Pressure upstream of main gas governor :
a) Standing : __________________ mbar b) Running : ___________________mbar
Gas pressure at burner head ________________ mbar _____________ in.w.g.
Gas rate (High) ________________ m3_____________ ft3/hr
Gas rate (Low) ________________ m3_____________ ft3/hr
Heat input ________________ MJ/hr _____________ Btu/h
CO ________________ % _____________ %
CO2________________ % _____________ %
Gross flue gas temperature ________________ °C _____________ °F
Ambient temperature ________________ °C _____________ °F
Nett flue gas temperature ________________ °C _____________ °F
Efficiency ________________ % _____________ %

SG10130501
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 / adjustment

SG10130501
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 / adjustment

FAULT FINDING
Anymodifications to the installation or component settingsresulting fromactions suggestedbelow may
require the re-establishment of the various settings as indicated earlier in this manual.
Burner Motor Fails To Start
Check:
• that the electrical supply is sufficient and the burner is correctly wired.
• all fuses for continuity and size.
• all control instruments are “calling for heat”.
• the gas train is electrically connected.
• the control box is not locked out (e.g. signal lamp faulty). (If the control box is locked out, press
the reset button).
• there is sufficient gas pressure.
• theburner probe is not earthed.
• the air pressure switch is in the “start” position, as follows: -
Switch off the electrical supply. Remove the plug-in assembly from the control box base. Check for an
open circuit between the air pressure switch terminals.
Ifthere is continuitybetween terminals, turn the dialon the airpressure switch fully anticlockwise tothe
minimum setting. If there is now an open circuit, the air pressure switch 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 will lockout for 10 seconds before attempting a further start. If it is still in the made position a
lockout will occur.
Start Failure Without Ignition
Check:
• The air pressure switch is set correctly.
• The electrode is correctly set and the porcelain is not cracked.
• Theignition transformer is not faulty.
• The control box is not faulty.
Start Failure Without Flame
If the start flame is not properly established, the safety circuit of the sequence controller will cause
lockout in one second.
The cause may be insufficient signal to the flame detection device. Alternatively the flame signal circuit
may be incomplete, or there is insufficient gas to allow the flame monitoring device to take over and
signalthe sequence controller to continue its cycle.This maybe remediedby adjustingthe fast initial lift
ofthe downstream safetyvalve.
Check:
• Theprobe is correctly positioned.
• Forbad earth continuity/faulty wiring.
• Theignition tranformerfor crossedpolarity.
• The flame signal circuit is incomplete.
SG1000105

FAULT FINDING Continued.....
Burner Fails To Establish Main Flame.
Check:
• Thegas valves areoperating correctly.
• The combustion air is set correctly.
• Thereis sufficientgas.
• The control box is not faulty.
Incorrect Rotation Of Burner Motor
Motorrotates clockwise viewedfrom theshaft end. Ifthe burnermotorrotation isincorrect, the single
phase motor should be renewed. On three phase motors, interchange any two phases. In normal
circumstances, this will correct the rotation.
SG1000105

Enertech Limited,
P O Box 1,
Vines Lane
Droitwich,
Worcestershire,
WR9 8NA
Tel: [phone] Fax: [phone]
Email: [email protected] Web: www.nu-way.co.uk