CleaverBrooks CEJS Installation, Operation And Maintanance page 30

Electrode Boiler
• Water Level Switches (%) (cont.)
LSH: High water limit which triggers the high water alarm.
LSHH: High-High water limit which triggers the high water boiler shutdown and opening of the HW
breaker.
• LSH Time Delay (sec)
Defines the amount of time delay between the triggering of the high water limit (LSH) and the sounding
of the high water alarm to alleviate momentary or nuisance trips.
• LSHH Time Delay (sec)
Defines the amount of time delay between the triggering of the high-high water limit (LSHH) and the
shutdown of the boiler to alleviate momentary or nuisance trips.
• Shield Position Switches (%)
ZSLL: Setpoint which limits the "Full-Down" position of the shield during normal boiler operation.
ZSH: Setpoint which limits the "Full-Up" position of the shield during normal boiler operation.
• Conductivity Level Switches (s)
CSL: Low conductivity limit which defines the conductivity threshold level that will allow the shield to
lower and the boiler to operate during cold start-up.
CSM: Median conductivity setpoint which enables/disables the chemical feed pump. When the boiler
is running, the chemical feed pump will be enabled when the conductivity level is below this setpoint
and disabled when the conductivity level is above this setpoint.
CSH: High conductivity limit which triggers the automatic blowdown valve to open.
CSHH: High-High conductivity limit which triggers an automatic boiler shutdown.
• Boiler Pressure Switches (psi)
PSLL: Defines the pressure setting that limits the feedwater valve position. This setpoint is duplicated
on the Operating Setpoints screen as the Press to Limit FW Vlv (psi) setting. When the boiler pressure
is below this set point, the travel of the feed water valve is limited to the High Press Limit FW Vlv (psi)
setpoint value on the Operating Setpoints screen.
PSL: Defines the pressure setting to allow the shield to modulate and control to setpoint after start-
up. Until this setpoint is reached, the shield ramp is moved incrementally based on the setpoints on
the Factory Settings screen. This setpoint is duplicated on the Operating Setpoints screen as the Press
to Release to Mod (psi) setting.
PSM: Pressure limit which disables the heater when this pressure setpoint is achieved in standby
mode only.
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