7. Check draft, smoke number, C0
2
and stack temperature.
Typical readings are as follows for natural draft:
Fire
Draft
Smoke C0
2
Low-fire (higher)
Trace 11-13%
High-fire
.03/.05 W.C.
Zero
12-14%
Adjust burner as required to obtain these readings.
8. Stop the burner with the service switch. Wait for the
postpurge, then turn it on again. After a prepurge period
the burner should light-off smoothly; then go to highfire.
9. Check the flame signal on both low and high-fire. The
Honeywell R4140M primary control with photocell should
read at least 2 microamperes. The Fireye D30-5010
primary control with photocell should read near 20 volts
DC normally, and 16-20 volts DC at saturation. For other
control readings, see Carlin wiring diagrams.
10. Check the flame failure response and safety lockout
by shutting off the fuel supply (or de-energizing the oil
valves) while the burner is running.
11. Check the low water cut-off (if used) by depressing float
switch or by draining water to reduce the level.
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