![Page 1: PWC Preferred Instruments a division of Preferred Utilities Mfg. Corp. Plant Wide Controller (PWC) Overview](https://reader035.vdocuments.us/reader035/viewer/2022062516/56649e715503460f94b703de/html5/thumbnails/1.jpg)
PWC
Preferred Instrumentsa division of Preferred Utilities
Mfg. Corp.
Plant Wide Controller
(PWC)
Overview
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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
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PWC
Easy to Operate
Key lockable DoorSecurity
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PWC
Easy to Operate Hardwired Control Switches & Indications:
Boiler On-Off-Auto
StatusIndications
Firing Rate Control Dial
Firing Rate Auto / Man
0 - 100 % Bargraph
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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
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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
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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
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PWC
Alarm & Event Summary
Up to 200 Alarms & Events
First in - First out Operator Actions Events Alarms Time & Date Stamped
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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)
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PWC
Easy Setup
Fill In The Blanks Boiler Sequence PID Tuning Outdoor Reset Setup Day / Night Setback Day / Week Setback Week / Year Setback
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PWC
Outdoor Reset / Setback Temp.
Easily Configured: Normal Setpoints Setback Setpoints High & Low Limits Outdoor Cutoff
Automatic Graphical Representation
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PWC
EXPANDABLE
PWC Front Door Open
(2 to 5 boiler lead / lag configuration shown with three spare slots)
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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
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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
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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
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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
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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
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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
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PWC
Communications
To Customer’s
Building Automation Systems
(Modbus / Bacnet)
Pagers
DieselsChillers etc.Boilers
(Modbus / Bacnet)
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PWC
Advanced Communication Capability
Communications Modbus communication to BAS or SCADA Dial In From PC Dial Out to Alpha Numeric Pager
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PWC
Dial In From PC
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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
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PWC
Installation
3/4” conduit connections
Screwed fast Cable Tie Downs
Power Fuses
Spare Terminals(typical)
Physical Separation Between
Operation and Wiring
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PWC
Custom Blockware
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PWC
Custom Displays
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PWC
Custom Charts
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PWC
Preferred Instruments
Preferred Instruments31-35 South Street • Danbury • CT
T: (203) 743-6741 • F: (203) 798-7313www.preferred-mfg.com