Steam Modulating Lead/Lag

The Chief Dispatcher Model JC-CDST optimizes steam system performance and helps extend Cast Iron Sectional, Finned-Tube, Fire Box, Flexible Tube or Firetube boiler life.

2 to 10 Modulating Boilers

• Boiler firing rates are automatically adjusted to satisfy the overall plant steam heating load using accurate PID control
• When desired, the Operator may set the firing rate manually

Warm Standby

• Each off-line boiler is periodically started and held at low fire until it returns to the Warm Standby Temperature
• This feature helps minimize thermal shock on the boiler when called on-line

"Base Load Auto-Shift"

• Lag boilers are “Base Loaded” for efficiency, but will increase or decrease the firing rate to “Help” the Lead Boiler.  This method minimizes boiler on/off cycling due to short term load swings while maximizing total boiler plant efficiency
• “Unison” modulating can be field selected (all boilers fire at the same rates)

10 Boiler Controller Front Panel Shown

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Panel Details
Controller: Case Size: Enclosure Type:	PWC (Click here for a complete hardware specifications) 19¼" H X 18" W X 8½" D Wall mounted, Weight: 55 lbs.
Inputs
Steam Pressure: BAS, Boiler Disable: Boiler Lockout: Warm Standby:	0 to 25 psi, 0 to 200 psi, or 0 to 500 psi, 4-20 mAdc 24 Vdc 120 Vac, optically isolated (each boiler) 120 Vac, optically isolated (each boiler) 120 Vac, optically isolated (each boiler)
Outputs
Modulation: Boiler Start:	Isolated 4-20 mAdc or 0-135 ohm (each boiler) Dry contact, 8FLA, ½ HP, 120 Vac (each boiler)

Optional Features	Catalog Number
Historical Trending	190604
Telephone Modem	190603
Order Sensors Separately (Quantity as Required)	Catalog Number
Steam Pressure Sensor  0-25 psi with syphon loop	70600
Steam Pressure Sensor  0-200 psi with syphon loop	70601
Steam Pressure Sensor  0-500 psi with syphon loop	70602