Raypak 751 Operations Instructions download pdf (Page 49)

tion wire and proper grounding and wiring. Turn

power back on. Repeat Step 3. If there is still no

spark after several attempts the igniter may be

misaligned;

5. Check to see if igniter is grounded out by pulling

the spark wire and doing a continuity check

between the igniter and burner. If the igniter is

grounded out, it must be realigned. Remove the

burner. Loosen the igniter nut, locate the igniter in

the center of the burner head and tighten igniter

nut. Confirm it is centered and reinstall burner

head;

6. If you have spark, turn off unit;

7. Turn on power. Unit will pre-purge 40-45 seconds

and move onto ignition trial. You will hear a click

from pilot gas valve (you will not hear the spark-

ing);

8. The pilot may not light at first trial; leave the unit

running until you have pilot. If you still do not see

pilot over 90 seconds; turn off the unit; repeat

steps 6-8;

9. Check pilot manifold pressure, Location (4).

Compare the reading to the value listed in the

tables;

10. Check pilot flame; 8 distinct circular blue flames

around the center of the pilot;

11. Replace the cap for pilot manifold adjustment

screw; do not over-tighten.

Note: For different gas control options, call the factory for proper pressure settings.

Table U: Pressure Settings and Emission Guidelines (True Readings) for NAT. GAS

Table V: Pressure Settings and Emission Guidelines (True Readings) for LP GAS

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Raypak 751 Operations Instructions Page 49