Filter
Top Products
60
Note:For different gas control options, call factory for proper pressure settings (ie; IRI, etc)
2.4 Check the Gas Supply Pressure, Location (1)
• Leave pilot gas valve and first manual gas valve closed;
• Slowly turn on main gas shut-off valve (outside the unit);
• Read the gas supply pressure from the manometer (Location 1);
• If pressure is > 14" W.C., Turn off the valve;
• Check if the service regulator is installed and/or adjust the service regulator.
3.0 START-UP
NOTICE: Reference the start-up pressures settings located on the side of the control box.
3.1 Blower Adjustment
1. Main gas shut-off valve is still closed;
2. Turn power on;
3. Check blower manometer reading, Location (5). Compare your reading to the “Pre-Fire” values shown in tables O-2
and O-3. If not, adjust the air shutter on the blower to attain the correct value;
4. Turn power off.
3.2 Pilot Adjustment
1. Turn on the gas shut-off valve, the main gas manual valve, and the pilot manual valve;
2. Turn off the manual gas valves at Locations (2) and (3);
3. Turn power on, after 40-45 seconds, ignition control will energize and send spark to ignition, observe through view
port for spark;
4. If you do not see spark, turn off power, check ignition 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 to ignition trial. You will hear a click from pilot gas valve (you
will not hear the sparking);
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.
TABLE O-2: Pressure Settings and Emission Guidelines (True Readings) for NAT. GAS