coated dials and black figures:
a.
Fuel oil supply pressure (0 to 1034 kPa (gage) 150 psig)
b.
Fuel oil pressure at burner (0 to 1034 kPa (gage) 150 psig)
[c.
Atomizing air pressure at burner (0 to 1034 kPa (gage) 150 psig)]
[d.
Atomizing steam pressure at burner (0 to 1034 kPa (gage) 150 psig
)].
2.5.2.2
Control Sequencing
Flame safeguard system shall be designed to ensure safe purge, light-off
and shutdown procedures, and to monitor light-off, main flame and boiler
operating conditions.
[a.
Flame safeguard system shall be automatically sequenced type with
programming timed and sequenced by a heavy duty, industrial type
timer. Timer shall be tamper-proof and shall be designed so that
advancement of timer to shorten purge will shut down unit.]
b.
Provide system with [ultraviolet] [infrared] scanner and
electronic relay located in the front wall which will shut down
the fuel within 2 to 4 seconds of loss of flame.
c.
Provide scanner output meter in panel for indication of scanner
signal strength.
d.
Safety system shall include the following limit devices
incorporated into a limit circuit:
(1)
Flame failure
(2)
High boiler outlet pressure
(3)
Low fuel oil pressure
(4)
Low water level cutout
(5)
Low combustion air flow
(6)
Low atomizing [air] [steam] pressure
(7)
Any additional as required by FM or NFPA
[(8) Low fuel oil temperature]
e.
Safety System Limits: Safety system limits specified above shall
be displayed on a first out annunciator mounted in the burner
panel. [Provide a common alarm contact to be wired to the
operator control console.]
2.5.2.3
Light Off
Failure shall require a manual restart of the programmer. Safety system
shall provide a mandatory purge with forced draft fan vanes proven open,
and a return to proven low fire position before light off. Main fuel valve
shall open for a timed period of 10 seconds during trial for ignition.
SECTION 15501N
Page 54
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