NeoTherm Boilers and Water Heaters
Page 121
During the Initiate Period:
•
All of the checks made under Synchronization,
plus:
•
Locks out if A/C line power errors occur.
•
Locks out if four-minute Initiate period has
been exceeded.
During the Standby Period:
•
All of the checks made under Synchronization,
plus:
•
Locks out if the Flame signal is present after
240 seconds.
•
Locks out if the Preignition Interlock is open
for more than 30 seconds.
•
Locks out if the Interlock Start check feature
is enabled and the Interlock String (including
the Airflow Switch) is closed for 120 seconds
with the controller closed, perhaps indicating a
jumpered or welded Interlock.
•
Locks out if the Main Valve terminal is
energized.
•
Locks out if an internal system fault occurs.
During the Prepurge Period:
•
All of the checks made under Synchronization,
plus:
•
Locks out if the Preignition Interlock opens
anytime during the Prepurge period.
•
Locks out if the Flame signal is detected for
more than 10 seconds during Prepurge.
•
Locks out if the Light Off Rate Fan RPM or
Low Fire Switch is not reached within four
minutes and fifteen seconds after the blower
is commanded to drive to the light off rate fan
RPM at the end of Prepurge.
•
Locks out if the Main Valve terminal is
energized.
•
Locks out if an internal system fault occurs.
During the Pre-Ignition Time:
•
All of the checks made under Synchronization,
plus:
•
Locks out if the Main Valve terminal is
energized.
During the Main Flame Establishing Period
(MFEP):
•
All of the checks made under Synchronization,
plus:
•
Locks out if no flame is present at the end of
the appropriate number of ignition retries.
•
Locks out if an internal system fault occurs.
During the Run Period:
•
All of the checks made under Synchronization,
plus:
•
Locks out if an internal system fault occurs.
•
Locks out if a safety-related parameter has
been changed, but the change has not been
verified and the controller has not been reset
using the button on the front of the control.
During the Postpurge Period.
•
All of the checks made under Synchronization,
plus:
•
Locks out if the Preignition Interlock does not
close in five seconds.
•
Locks out if the Main Valve terminal is
energized.
•
Locks out if an internal system fault occurs.
•
Locks out if flame is sensed 240 seconds after
the Run period.
Summary of Contents for NTV1000
Page 2: ......
Page 35: ...NeoTherm Boilers and Water Heaters Page 31 Fig 20 Ladder Diagram...
Page 36: ...LAARS Heating Systems Page 32 Fig 21 Wiring Diagram...
Page 37: ...NeoTherm Boilers and Water Heaters Page 33...
Page 51: ...NeoTherm Boilers and Water Heaters Page 47 Fig 52 Connection Terminals...
Page 130: ...LAARS Heating Systems Page 126 Fig 140 Machine Frame and Rear Panel 13 3 PARTS ILLUSTRATIONS...
Page 131: ...NeoTherm Boilers and Water Heaters Page 127 Fig 141 Front Panel and Covers...
Page 132: ...LAARS Heating Systems Page 128 Fig 142 Burners and Combustion Chambers...
Page 134: ...LAARS Heating Systems Page 130 Fig 145 Electronic Components...
Page 135: ...NeoTherm Boilers and Water Heaters Page 131 Fig 146 Condensate Trap Fig 147 Control Bezel...
Page 136: ...LAARS Heating Systems Page 132 Fig 148 Flow Switch...
Page 137: ...NeoTherm Boilers and Water Heaters Page 133 This page intentionally left blank...