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Preferred Instruments a division of Preferred Utilities Mfg. Corp.

Plant Wide Controller (PWC) Overview. Preferred Instruments a division of Preferred Utilities Mfg. Corp. Plant Wide Controller.

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Preferred Instruments a division of Preferred Utilities Mfg. Corp.

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  1. Plant Wide Controller (PWC) Overview Preferred Instruments a division of Preferred Utilities Mfg. Corp.

  2. Plant Wide Controller The Plant Wide ControllerTM (PWC) is a state-of-the-art boiler sequencing, control and monitoring system. The PWC combines innovative ease of operation, communication and expansion capabilities with boiler application expertise. Off-the-shelf, standard modulating Lead-Lag applications can be expanded to control circulating water variable speed pumps and isolation valves while monitoring the flame safeguard and boiler control systems.

  3. Easy to Operate Key lockable Door Security

  4. Hardwired Control Switches & Indications: Easy to Operate Firing Rate Control Dial Firing Rate Auto / Man 0 - 100 % Bargraph Boiler On-Off-Auto Status Indications

  5. Easy to use displays for: Boiler Plant Control & Monitoring Historical Trending Alarm & Event Handling Boiler Plant Setup Easy to Operate LCD Graphic Display and Keypad

  6. Home Page - Boiler Overview Display Arrow Keys - Move Cursor Menu, Page Up, Down - Display Selection Alarm List - Alarm, Event Display Alarm Silence PB Easy to Operate Display Keys

  7. Lead / Lag Control Start Qty Control Sequence Control Custom Lead Rotate Alarm Status Time / Date Stamped Header Status Pressure / Temperature Setpoint Outside Temperature Home Page • Status • Started Boilers • Warming Boilers • Modulating Boilers • Tripped Boilers

  8. Up to 200 Alarms & Events First in - First out Operator Actions Events Alarms Time & Date Stamped Alarm & Event Summary

  9. An Essential Monitoring Tool Multiple(4) Pen “Charts” 8 min, 40 min., and 2, 8, & 24 hour charts Historical Trending • 8 channel, 2 Hr Historical Memory - Standard • 32 Mb Historical Memory - Optional • 32 ch AI + 32 ch DI every 15 seconds for 30 days • 90 or more days for less channels with low activity (depends on data compression efficiency)

  10. Fill In The Blanks Boiler Sequence PID Tuning Outdoor Reset Setup Day / Night Setback Day / Week Setback Week / Year Setback Easy Setup

  11. Easily Configured: Normal Setpoints Setback Setpoints High & Low Limits Outdoor Cutoff Automatic Graphical Representation Outdoor Reset / Setback Temp.

  12. PWC Front Door Open (2 to 5 boiler lead / lag configuration shown with three spare slots) EXPANDABLE

  13. CPU Board • (2) Analog Inputs (4-20 mAdc /Thermistor) • (1) Relay Output (SPDT, 8A) • (1) RS232 programming Port • (1) Isolated RS485 Port • (Modbus or Bacnet Option) • (1) Telephone Modem Option Card • Dial in or dial out, 33.6 kb, RJ-11 jack, Data and Pagers • (1) Printer Port (Alarms / Logs)

  14. Discrete Input • (15) Inputs, 120 Vac, optically isolated • (5) groups of isolated neutrals • (15) LED status indications • (2) 2A / 120 Vac Fuses

  15. Hand-Off-Auto Relay Output • (5) Relay Outputs • (8A inductive, 1/2 Hp, 120 Vac) • (5) Hand-Off-Auto Toggle Switches • Toggle Switch is directly wired into output circuit. • (5) LED's for Output ON / OFF • (5) LED's for ”Call for Operation” • (2) 2A / 120 Vac Fuses

  16. Auto/Manual Analog Output • (5) Modulating Analog Outputs • (5) Auto-Manual Toggle Switches • "Manual" hardware overrides CPU • Bumpless Manual to Auto Transfer • (5) 0-100% Output Control Knobs • (5) 0-100% Output Bargraphs • Requires (1) Output Card per active channel, Any combination of 4-20 mA and 135 ohm cards

  17. Analog Input • (8) UNIVERSAL Inputs • Switch Selectable as: • 2 wire 4-20 mA, with internal 24 Vdc • Thermistor, -60F - 300 F • Thermocouple, Type J, 0 - 1200 F, • 0-5 Vdc, potentiometers and other signals • Pulse, 0.6 ppm - 4000 Hz, 0-15 Vdc pulsers for Oil, Gas, Water, & kWh meters • Enables Fuel Budget Fuel Consumption Tracking • (8) LED status indications • Power Ouputs and Signal Inputs are short circuit protected

  18. Relay Output • (8) Isolated Relay Outputs • ( 8A inductive, ½ Hp, 120 Vac) • (2) SPDT, (6) NO-SPST • (8) LED status indications • (2) 2A / 120 Vac Fuses

  19. To Customer’s Building Automation Systems (Modbus / Bacnet) Communications Pagers (Modbus / Bacnet) Diesels Chillers etc. Boilers

  20. Advanced Communication Capability • Communications • Modbus communication to BAS or SCADA • Dial In From PC • Dial Out to Alpha Numeric Pager

  21. Dial In From PC

  22. Availability • Hard Service Manual • Every Boiler Start / Stop Command & Firing Rate can be set manually in the unlikely event of a CPU hardware failure or software corruption • A CPU failure will not prevent central manual control of the boiler plant • This is a UNIQUE FEATURE! • Fault Monitoring • Analog Inputs (thermisters, 4-20mA signals) are monitored & LED used to show fault status

  23. Installation Spare Terminals (typical) Physical Separation Between Operation and Wiring Screwed fast Cable Tie Downs 3/4” conduit connections Power Fuses

  24. Custom Blockware

  25. Custom Displays

  26. Custom Charts

  27. Preferred Instruments Preferred Instruments 31-35 South Street • Danbury • CT T: (203) 743-6741 • F: (203) 798-7313 www.preferred-mfg.com

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