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Part number 550-142-850/0716
82
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WALL MOUNT GAS-FIRED WATER BOILER — Boiler Manual
1. Heat demand detection time
CH mode:THEREISACONlRMINGTIMEOFSECONDSDURING
which the demand has to be always on.
The request switch is sampled every 0.2 seconds, so the
maximum delay is 3.2 seconds.
DHW instant mode: Combi boiler the maximum delay
ISSECONDSWHICHISTHESAMPLETIMEOFTHEmOWSENSOR
DHW storage mode: Heating Only boiler with Indirect
tank the maximum delay is 0.2 seconds which is the
SAMPLETIMEOFTHETANKTHERMOSTAT
2. Pre-pump time
CH instant mode: CH - Pump time 30 seconds.
DHW instant mode: there is no pre-pump.
DHW storage mode: DHW Pre-pump time 30 seconds.
3. Pre-purge time
)TISTHETIMETHATTHEFANTAKESTOREACHTHEIGNITIONLEVEL
TOEFFECTIVELYPURGEBOILERVENTING
4. Ignition
4HEREARESECONDSOFPREIGNITIONWHERETHECONTROL
CHECKSTHESTATUSOFTHEGASVALVE!NDTHENTHEREISTHE
Check ignition sequence
4HEIGNITIONSEQUENCETIMELINEANDOPERATIONALDESCRIPTIONFORTHE#OMBIAND(EATING/NLYBOILERBELOWHELPTOUNDERSTANDTHE
TIMINGOFTHECYCLES)NYOURTROUBLESHOOTINGREFERTOTHENUMBERSTHROUGHASTHEYDESCRIBEEACHSTEPOFTHEIGNITIONCYCLE
32 Troubleshooting(continued)
Figure 105 4IMELINEOFIGNITIONSEQUENCEFORTHE#OMBIAND(EATING/NLYBOILERS
SPARKFORATIMEDEPENDSONTHEGASTYPE
Natural Gas, 1.6 seconds.
LP Gas, 4.6 seconds.
5. Gas valve safety time
7ITHNOmAMETHEGASVALVECANBEKEPTOPENFORCERTAINTIME
Natural Gas, 3 seconds.
LP Gas, 4.8 seconds.
)FATTHEENDOFTHISTIMETHEmAMEISNOTIONIZEDTHEGAS
VALVEHASTOBECLOSEDANDTHEINTERPURGETIMEFORAT-
tempts is ran.
6. Inter-purge time for A01 attempts
4HEREISSECONDSOFPURGETIMEBEFOREANEWATTEMPT
AFTERAFAULTYIGNITION!FTERATTEMPTSTHEBOILERGOESINTO
Lockout (code “!v). This error condition is stopping
the boiler and to get to normal operation again, manual
reset is required.
7. Inter-purge time for A06 attempts
4HEREISSECONDOFPURGETIMEBEFOREANEWATTEMPTAFTER
ALOSTmAME)FTHEmAMEDISAPPEAREDCONSECUTIVETIMES
within 10 minutes, the boiler goes into Lockout (code
“!v) to get to normal operation again, manual reset is
required.
HEAT DEMAND
DETECTION TIME
PRE-PUMP TIME PRE-PURGE TIME
IGNITION
GAS VALVE SAFETY TIME
IGNITION
INTER-PURGE FOR
A01 ATTEMPTS
IGNITION
INTER-PURGE FOR
A06 ATTEMPTS
FLAME LOSS