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5. Reset the low gas pressure switch and gas
pressure lockout.
6. Increase the high gas pressure switch setting
to 14" w.c.
7. Cycle the boiler. The boiler should lockout on
flame failure or ignition failure. (Boiler may
recycle once if there was an ignition failure.)
8. Reset the flame failure lockout and decrease
the high gas pressure setting to 1" w.c.
9. Cycle the boiler. The boiler should lockout on
gas pressure. In this case it will be the high gas
pressure switch.
10. Open the manual gas valve between the
automatic gas valve and the blower inlet.
11. Reset the high gas pressure switch and gas
pressure lockout.
12. Cycle the boiler. The boiler should establish
main flame.
13. If flame is not established reset the flame
failure lockout and repeat Step 12. (Consult
with the factory for assistance if flame cannot
be established after 3 attempts.)
14. Check that O
levels are within a safe operating
2
range. (5.0% to 7.0%)
15. Menu > Operation > High/Low > High > Back
Arrow (76 password required)
16. Once boiler has reached high fire rate, check
that O
levels are within a safe operating range.
2
(5.0% to 7.0%)
17. Adjust supply gas pressure between 4" w.c. and
14" w.c. as measured at the ball valve tapping
outside of the boiler top jacket panel.
18. Adjust the O
level so that it is within 5.0% to
2
7.0% at high fire with all jacket doors installed
and front cabinet door closed.
a. For best efficiency, standard O
to 5.0% to 5.5%.
b. For boilers specified to be less than 20 ppm
NOx adjust the O
c. For boilers specified to be less than 9 ppm
NOx adjust the O
46
Thermal Solutions, 1175 Manheim Pike, Lancaster, PA 17601 Website: www.thermalsolutions.com
should be set
2
level within 6.5% to 7.0%.
2
level within 7.0% to 9.0%.
2
Phone: 717-239-7642 Fax: 877-501-5212 Email: sales@thermalsolutions.com
19. Note: For O
High Fire adjustment, reference
2
only the combustion system that is on the
boiler: See Figure 13 and Figure 14 to determine
the boiler's combustion system.
20. O
level must be set at high fire with all jacket
2
doors installed and front cabinet door closed
a. Dungs - High Fire O
with the gas shutter valve located on the
outlet of the gas valve (Figure 13).
i. Turn adjustment screw toward the Plus (+)
side to increase gas flow (decrease O
ii. Turn adjustment screw toward the Minus (-)
side to decease gas flow (increase O
iii. Menu > Operation > High/Low > Low > Back
Arrow (76 password required)
iv. Verify the O
level is within +/- 0.3% of the
2
O
level set at high fire with all jacket doors
2
installed and front cabinet door closed.
(Consult the factory for assistance if the O
levels are not within +/- 0.3% from high fire
to low fire.)
v. Go to Step 21.
b. Siemens - High Fire O
adjusting the Butterfly Valve (Figure 14).
i. While holding long hex adjusting nut, loosen
jam nuts at each end of the adjusting nut.
ii. To increase gas flow, turn long hex, butterfly
adjustment nut, clockwise a maximum
of 1 flat of the long hex adjuster nut per
adjustment. Then allow to stabilize.
iii. To decrease gas flow, turn long hex, butterfly
adjustment nut counter-clockwise a
maximum of 1 flat of the long hex adjuster
nut per adjustment. Then allow to stabilize.
iv. Secure by holding the long hex adjusting nut
and tightening the jam nuts at each end.
c. Siemens - Low Fire O
the SKP55 regulator (See Table 28).
i. Menu > Operation > High/Low > Low > Back
Arrow (76 password required)
ii. Remove brass hex cover from front center
of regulator.
levels are adjusted
2
level).
2
level).
2
levels are adjusted by
2
levels are adjusted with
2
2
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