d.
Dual (NC) motorized oil shut-off valve with proof of closure.
e.
Low fuel oil pressure switch.
f.
Fuel oil flow transmitter.
g.
Fuel oil pressure gauge for fuel oil supply and burner pressure.
h.
Manual shut-off valves at connections to supply and return headers.
i.
"Y" type strainer.
j.
Fuel oil check valve.
k.
High fuel oil temperature switch.
l.
Low fuel oil temperature switch.
m.
Fuel oil temperature gauge.
n.
Electric fuel oil preheater capable of raising oil temperature 56
degrees C 100 degrees F at rated firing rate and comply with UL 574.
2.4.9.2
Steam Atomizing Train
a.
Manual shut-off valve at connection to atomizing supply.
b.
Y-type strainer in atomizing steam line.
c.
Automatic shut-off solenoid and check valve in atomizing steam
branch line to allow automatic purging of burner.
d.
Check valve to prevent backflow in steam line.
e.
Pressure gauge with isolating valve for servicing in atomizing
steam supply and at burner.
f.
Solenoid shut-off valve to close when burner shuts down.
g.
One self-contained pressure regulating valve to maintain atomizing
steam pressure.
h.
Low atomization steam pressure switch.
i.
Steam trap.
2.4.9.3
Air Atomizing Train
a.
Manual shutoff valve at connection to atomizing supply.
b.
Y-Type strainer in atomizing air line.
c.
Automatic shutoff solenoid and check valve in atomizing air line
to allow automatic purging of burner.
d.
Check valve to prevent backflow in air line.
e.
Pressure gauge with isolation valve for servicing in atomizing air
supply and at burner.
SECTION 15561A
Page 39
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