User Guide

26
General
Trouble Shooting Guide
DETERMINING BURNER PATTERN
To establish the correct spray pattern, try a
hollow cone nozzle with an 80° spray angle (a
popular angle in the industry). If the pattern is
not satisfactory change to a solid cone nozzle. Reducing nozzle
angle in 10° increments from 80° is a good way to find proper
angle. (Mobile home units usually require 90° spray angles.)
NOISY FIRES
Pulsation and thumping or rumbling
can be most objectionable to a
homeowner. It’s possible in some cases
to correct the situation by proper
nozzle selection.
• If the unit is fired with a solid cone nozzle, try a hollow cone
or Type W nozzle.
• If the unit is fired with a 60° nozzle, the noise level can be
reduced in most cases by going to a wider angle.
• Check to make sure the pump pressure is properly set.
• Check the nozzle spray to be sure it is satisfactory. If the
nozzle is clogged, it may be impossible to ignite the resulting
spray.
• Check the spray pattern. Above 2.00 GPH, some burners give
delayed ignition with the hollow cone sprays, in which case
a solid cone nozzle may be the answer.
• Sometimes the next size smaller nozzle will help. Also, the
smaller droplets will burn cleaner decreasing the amount of
soot and dirt.
• Installing a delayed opening solenoid valve on the nozzle
line can usually help pulsation during start up or shutdown.
COLD OIL
Outside storage tanks can be a source of burner
problems because oil becomes more viscous as
the temperature drops. This, in turn, can result in
slow ignition, collapsing sprays and noisy fires.
There have been some cases where the oil was so
cold it would not flow through the pipe.
Although some success with special nozzles has
been reported, the surest cure for this problem is
to increase the pump pressure to 120-125 psi and use the next size
smaller nozzle. The extra energy from the pump will atomize the
heavier oil, resulting in better ignition and a more stable flame.