7
®
6.
In the event the pilot flame is not detected by the end of trial for ignition period (PTFI), the pilot
gas valve (Terminal 3) and spark ignition (Terminal 4) are de-energized. A safety shutdown
occurs followed in approximately 30 seconds by a safety lockout that de-energizes the blower
motor (Terminal 8) and energizes the lockout alarm circuit (Alarm LED lighted).
7.
In the event of a flame failure during a firing period, the pilot and main fuel valves are de-ener-
gized. Following the prepurge period (as determined by jumpers #1 through #5), with proven air
flow (Air Flow LED lit), the pilot gas valve and spark ignition are re-energized and a five or ten
sec. (as determined by jumpers #6 or #7) trial for ignition is initiated (PTFI LED lit). If pilot
flame is detected (Flame LED lit), the main fuel valve is energized, the spark ignition is de-ener-
gized. In the event the pilot flame is not detected by the end of trial for ignition period (PTFI),
the pilot gas valve (Terminal 3) and spark ignition (Terminal 4) are de-energized. A safety shut-
down occurs followed in approximately 30 seconds by a safety lockout that de-energizes the
blower motor (Terminal 8) and energizes the lockout alarm circuit (Alarm LED lighted).
8.
Manual Reset (supply power cycled off/on) is required following any safety lockout.
NOTE: Wait 10 seconds after lockout before restarting the control.
Pilot Ignited Burners - “Non-recycle” Operation
The function of “non-recycle” pilot ignited burners is the same as described for the “recycle” con-
trols, except that the “non-recycle” operation will lock out following any flame failure. “Recycle” or
“non-recycle” operation is determined by the position of jumper #8. See Programmer jumper set-
tings on page 5.
Direct Spark Ignited Burners - “Recycle” Operation
With jumper #8 in the “recycle” position, the typical wiring arrangement illustrated on pages 10 and
11 for direct spark ignited burners provides the following function:
1.
With power applied to Terminal 7 (Opr Ctrl LED lighted), the burner motor circuit (Terminal 8)
is energized. The control then waits for the proof of airflow input (Terminal 6) to be energized.
2.
The Pre-Purge timing starts when terminal 6 is energized.
3.
Following the selected prepurge period (as determined by jumper #1 through #5), KL-1 closes,
energizing Terminal 3 which powers the primary main fuel valve, and Terminal 4 which powers
the spark ignition. A five or ten second (as determined by jumper #6 and #7) trial for ignition is
initiated (
PTFI
LED lit).
4.
When pilot flame is detected (
Flame
LED lit), KF-1 closes, energizing Terminal 5 which pow-
ers the secondary main fuel valve, and KF-2 opens, de-energizing Terminal 4 which shuts off
the spark ignition.
5.
When the operating control opens its circuit, or if a power failure occurs, the control is de-ener-
gized. Power interruptions in the millisecond range do not affect the operation of the control.
Power interruptions at longer duration will cause the control to recycle.
6.
In the event the pilot flame is not detected by the end of trial for ignition period (PTFI), the pilot
gas valve (Terminal 3) and spark ignition (Terminal 4) are de-energized. A safety shutdown
occurs followed in approximately 30 seconds by a safety lockout that de-energizes the blower
motor (Terminal 8) and energizes the lockout alarm circuit (Alarm LED lighted).
Direct Spark Ignited Burners - “Non-recycle” Operation
The function of “non-recycle” direct spark ignited burners is the same as described for the “recycle”
controls, except that the “non-recycle” operation will lock out following any flame failure. “Recy-
cle” or “non-recycle” operation is determined by the position of jumper #8. See Programmer Jumper
Settings on page 5.
