PWC

Preferred Instrumentsa division of Preferred Utilities

Mfg. Corp.

Plant Wide Controller

(PWC)

Overview

PWC

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.

Plant Wide Controller

PWC

Easy to Operate

Key lockable DoorSecurity

PWC

Easy to Operate Hardwired Control Switches & Indications:

Boiler On-Off-Auto

StatusIndications

Firing Rate Control Dial

Firing Rate Auto / Man

0 - 100 % Bargraph

PWC

Easy to Operate

Easy to use displays for: Boiler Plant Control & Monitoring Historical Trending Alarm & Event Handling Boiler Plant Setup

LCD Graphic Displayand Keypad

PWC

Home Page - Boiler Overview Display

Arrow Keys - Move Cursor

Menu, Page Up, Down - Display Selection

Alarm List - Alarm, Event Display

Alarm Silence PB

ABC

1DEF

2GHI

3

JKL

4MNO

5

STU

7VWX

8YZ "

9

% # ,

0: < >

./ + -

SPACE

PQR

6

PAGEDOWN

PAGEUP

MENU

HOMEPAGE

ESC ENTERALARM

LISTALARM

SILENCE

Easy to Operate

Display Keys

PWC

Home Page Lead / Lag Control Start Qty Control Sequence Control

Custom Lead Rotate

Alarm Status Time / Date Stamped

Header Status Pressure / Temperature Setpoint Outside Temperature

Status Started Boilers Warming Boilers Modulating Boilers Tripped Boilers

PWC

Alarm & Event Summary

Up to 200 Alarms & Events

First in - First out Operator Actions Events Alarms Time & Date Stamped

PWC

Historical Trending

An Essential Monitoring Tool

Multiple(4) Pen “Charts”

8 min, 40 min., and

2, 8, & 24 hour charts

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)

PWC

Easy Setup

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

PWC

Outdoor Reset / Setback Temp.

Easily Configured: Normal Setpoints Setback Setpoints High & Low Limits Outdoor Cutoff

Automatic Graphical Representation

PWC

EXPANDABLE

PWC Front Door Open

(2 to 5 boiler lead / lag configuration shown with three spare slots)

PWC

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)

RUN

CPU OK

FORCED

CPU Module

ALARM

BATTERY

PROGRAMMINGPORT - COM 1

PRINTERPORT

MODEMRJ-11

Tx

Rx

OH

CD

AA

MODEM 1

Tx

Rx

RS485 - COM 2

PWC

Discrete Input (15) Inputs, 120 Vac, optically

isolated (5) groups of isolated neutrals (15) LED status indications (2) 2A / 120 Vac Fuses

FAN

FUEL V ALVE

LOCKOUT

BOILER 1

FAN

FUEL V ALVE

LOCKOUT

BOILER 2

FAN

FUEL VALVE

LOCKOUT

BOILER 3

LOW FEEDWTR PSI

LOW FEED TANK LEV

F1

F2

PWC

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

F1

F2

BOILER 2

ON - OFF - AUTO

BOILER 1

ON - OFF - AUTO

BOILER 3

ON - OFF - AUTO

BOILER 4

ON - OFF - AUTO

CIRC PUMP 1

ON - OFF - AUTO

PWC

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

MAN AUTO

BOILER 1

MAN AUTO

BOILER 2

MAN AUTO

BOILER 3

MAN AUTO

BOILER 4

MAN AUTO

CIRC PUMP 1

PWC

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

CJC

STEAM HDR PSI

FEEDWATER HDR PSI

FUEL GAS FLOW

COND. RETURN LEVEL

MAKE- UP FLOW

DEAERATOR LEVEL

GAS HDR FLOW

OIL HDR FLOW

PWC

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

STEAM HDR PSI

FEEDWATER HDR PSI

DEAERATOR LEVEL

COND. RET. LEVEL

MAKE- UP FLOW

DEAERATOR LEVEL

GAS HDR FLOW

OIL HDR FLOW

F1

F2

PWC

Communications

To Customer’s

Building Automation Systems

(Modbus / Bacnet)

Pagers

DieselsChillers etc.Boilers

(Modbus / Bacnet)

PWC

Advanced Communication Capability

Communications Modbus communication to BAS or SCADA Dial In From PC Dial Out to Alpha Numeric Pager

PWC

Dial In From PC

PWC

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

PWC

Installation

3/4” conduit connections

Screwed fast Cable Tie Downs

Power Fuses

Spare Terminals(typical)

Physical Separation Between

Operation and Wiring

PWC

Custom Blockware

PWC

Custom Displays

PWC

Custom Charts

PWC

Preferred Instruments

Preferred Instruments31-35 South Street • Danbury • CT

T: (203) 743-6741 • F: (203) 798-7313www.preferred-mfg.com