TriangleTube Prestige Slol 250, Installation And Maintenance Manual

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46
Start-Up Procedures
STANDBY, no demand for heat
Fan prepurge or post purge cycle
Ignition sequence
Burner ON for space heating (CH)
Burner ON for domestic hot water (DHW)
Pre-check for air flow prior to prepurge cycle
Burner OFF due to reaching temperature setpoint
Domestic hot water (DHW) post pump cycle
Space Heating (CH) post pump cycle
Burner blocked:
Supply temperature too high (202 F) . Burner
will remain OFF until temperature drops
below 200 F
Return temperature too high (202 F). Burner
will remain OFF until temperature drops
below 200 F
Return temperature is higher than
supply temperature. Burner will remain OFF
until corrected.
Supply temperature increased too quickly.
Burner will remain OFF for a 10 minute period.
Burner will recycle, increasing waiting period 1
minute for a max. 15 minutes
Factory supplied LWCO device or
external limit (terminals 15 & 16) is OPEN.
Burner off for 150 seconds, auto reset.
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180
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Display Boiler function
No blower signal
Blower signal present with no demand, Burner
will remain OFF until condition terminates
Temperature difference between the supply and
return is more than 72 F. Burner will remain OFF
for 150 seconds. Burner will recycle increasing
wating period 1 minute for a max. 20 cycle.
Flue temperature sensor is short-circuited.
Burner OFF until corrected
Flue temperature senor is “open” Burner OFF
until corrected.
Flue temperature greater than 240 F but less
than 250 F. Burner off for 150 seconds
Wait for the blower to start
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Indirect water heater temperature sensor is
short-circuited. Burner OFF until corrected.
Indirect water heater temperature sensor is
“open” or disconnected. Burner OFF until
corrected.
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Power frequency deviation
1 1 6
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Flame current signal lost
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Standby Mode Display