PF X4-400, Installation And Operation Manual

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8.4 The correct test instruments are:
a. O
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analyzer (electronic or Fyrite absorption system)
b. CO indicator (Monoxor or similar)
c. Stack thermometer
d. Draft gauge or inclined manometer
e. U-tube manometer or calibrated 0-10” and 0-35” w.c. pressure gauge
f. Combination volt/ammeter
g. D.C. Micro-Ammeter
9. SERVICE/MAINTENANCE SUGGESTIONS
9.1 Burner Fails to start:
1.
Bad fuse or switch open on in-coming power source, or motor overload out.
2. Control circuit has an open control such as operating, limit or low water cut-off.
3. Push the reset button on the motor or open the power circuit to the primary safety control.
4. Loose or faulty wiring. Tighten all terminal screws. Check wiring, against wiring diagram
furnished with burner.
9.2 Burner Motor Runs, but Pilot Does Not Light
1.
Be sure gas is turned on at meter and pilot cock is open.
2. Place hand on pilot valve to “feel” it open. Check gauge at tee in pilot line for gas pressure and
prompt opening of pilot valve.
3. Check visually or by sound for spark arcing.
4. Refer to section 7.10 on pilot checking procedures.
5. Check air switch and be sure its circuit closes during start.
9.3 Burner Motor Runs, Pilot Lights, but Main Gas Valve Does Not Open
1.
Check flame signal. If signal is low, adjust pilot gas pressure and air settings for improved readings.
2. Check gas valve circuit.
3. Shut-off cock or test cock not open.
4. Defective main valve.
9.4 Occasional Lockouts For No Apparent Reason
1.
Re-check micoamp readings. If insufficient, check gas pressure and air damper setting. Check
electrode setting. If flame signal is low, flame rod may have to be re-positioned.
2. Check ignition cable and electrode porcelain for damage or breaks, which could cause short.
3. Check for loose or broken wires.
9.5 Burner Will Not Start – Even Though Burner Had Never Failed Before Or Had Been running On Normal
Cycling Without Failure.
1.
Operating Control circuit open.
2. Defective control or loose wiring.
3. Limit circuit open.
9.6 The burner must be periodically inspected to insure safety and performance. All maintenance must be
performed with the main electrical power off and the main gas shutoff valve off.
1.
Inspect blower inlet screen and clean any buildup of lint.
2. Inspect blower wheel blades and clean any buildup of dirt.
3. Inspect ignition electrodes and wiring for any cracks that may cause shorting.
4. Oil the blower motor at the manufacturer’s recommended intervals.
5. Verify that the pilot and or direct spark electrodes are still within specifications (set per drawing 6,6A
and 6B in this manual).
6. Verify the proper operation of the Primary Safety Control, airflow switch, and operating controls.
7. Check safety gas shutoff valves for gas tightness.
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