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FIGURE 17
TYPICAL GAS BURNER ASSEMBLY
Orifice
Each burner uses an orifice (figure 18) which is precise
ly matched to the burner input. Install only the orifices
with the same threads. The orifice is threaded into the
burner manifold. The burner is supported by the orifice
and will easily slide off for service.
NOTE-Do not use thread sealing compound on the ori
fices. Using thread sealing compound may plug the ori
fices.
Each orifice and burner are sized specifically to the unit.
Refer to ProductZone@www.davenet.com for correct
sizing information.
5-Primary High Temperature Limits S10
S10 is the primary high temperature limit and is located on
the blower deck to the left of the blower housing.
Primary limit S10 is wired to the A55 Unit Controller which
energizes burner 1 control (A3). Its N.C. contacts open to
de-energize the ignition control when excessive tempera
ture is reached in the blower compartment. If the limit trips
the blower will be energized. Limit settings are factory set
and cannot be adjusted. If limit must be replaced, the same
type and set point must be used.
ORIFICE WITH
PIPE THREADS
Tighten to 6.25 + .5 ft.lbs.
Do not over-tighten.
FIGURE 18
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