35
®
3.
After the PTFI period has begun, switching back to the Check position will stop the program in the
PTFI period, allowing for pilot and/or scanner alignment adjustments to be made. The control will
display:
It will hold in this position indefinitely as long as the flame signal strength is above the threshold
of 10. If it drops below 10 for thirty consecutive seconds, lockout will occur and the message on
the display will read Flame Fail PTFI.
4.
Switching from run to check during the burner on period will drive the modulator circuit to low
fire (10-12 Closes). This allows for low fire fuel-air adjustments and holding the burner at low fire.
Consult your boiler/burner instructions for low fire hold firing recommendations. The control will
display:
As an aid adjusting the burner linkages, pilot, etc., a check-run selector is provided on each EP-and
EPD Series Programmer Module.
OPERATIONAL TEST
WARNING: Before testing the control operation on the boiler, close the manual main shut-off
fuel valve. Failure to do this may cause injury or property damage.
1.
Close the manual main shut-off fuel valve.
2.
Recheck all limit circuit wiring for proper operation and correct connection.
3.
Confirm that the automatic main fuel valves are wired to terminal “7.”
4.
Power the control and electronically check the proper sequence of operation according to the
Operation section on page 11 of this bulletin.
5.
After assuring yourself that all interlocks and valves are properly wired and that the sequence of
operation is correct, open the manual main shut-off fuel valve and proceed cautiously through the
boiler light off process. Check all safety interlocks for proper shut down of the boiler.
When the installation and all burner adjustments are completed, the entire burner control system should
be tested in accordance with the burner manufacturer’s instructions. The procedure should verify the
correct operation of:
1.
Each operating control (temperature, pressure, etc.).
2.
Each limit switch (temperature, pressure, low water cutoff, etc.).
3.
Each interlock switch (airflow switch, high and low fuel pressure or temperature switches, purge
and low fire start switches, fuel valve proof of closure interlock, etc.).
4.
Pilot flame failure response and lockout.
5.
Main flame failure response and lockout.
6.
Tight shut off of all fuel valves.
CAUTION: LIVE VOLTAGE IS NECESSARY TO PERFORM THIS TEST.
Voltage Test
A Voltage Check is necessary to identify a potential problem with the supply to the control. This could
be caused by an improperly sized or faulty transformer, faulty load coils or low entry voltage. Follow
this procedure:
1.
Using the Service Adapter (60-2107), monitor the L1-L2 supply throughout a complete burner
cycle. The acceptable voltage range is 102V-132V. At no time during the cycle should the voltage
dip below the minimum level.
2.
Check other load terminal (M/L2, 5/L2, 6/L2, 7/L2) for voltage at improper times or improper val-
ues.
CHECK PTFI
19
FLAME SIGNAL
CHECK AUTO
25
LOW FIRE SIGNAL
