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OPERATIONAL TEST
Close the manual main shut-off fuel valve.
1.
Recheck all limit circuit wiring for proper operation and correct connection.
2.
Confirm that the automatic main fuel valves are wired to terminal “7.”
3.
Power the control and electronically check the proper sequence of operation according to the
Operation section on page 28 of this bulletin.
4.
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.
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.
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
values.
TEST CHECKOUT PROCEDURES
Normal Pilot Flame Test
1.
At the start of PTFI, place the RUN/CHK switch in the CHK position.
2.
Observe the pilot flame signal on the display. If the average signal is below the minimum of 10,
readjust the pilot flame or realign the flame detector.
3.
During the pilot flame test, if flame is not detected for a continuous 30 seconds, the control will
lockout. To re-establish the pilot flame trial for ignition (PTFI), manual reset of the lockout
switch is required, and a complete prepurge accomplished.
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.
CAUTION: LIVE VOLTAGE IS NECESSARY TO PERFORM THIS TEST.
CAUTION: Before making a pilot flame test, manually shut off the fuel supply to the main
burner.