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Leslie PMC-1 Installation, Operating, And Maintenance Instructions Diagrams & Parts List

Electro-pneumatic controller
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INSTALLATION, OPERATING,
26/2.5.1
AND MAINTENANCE INSTRUCTIONS
Rev. 3
DIAGRAMS & PARTS LIST
12501 Telecom Drive, Tampa FL 33637
PMC-1 ELECTRO-PNEUMATIC CONTROLLER
T A B L E O F C O N T E N T S
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Pneumatic Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
PMC-1
Electro-Pneumatic
Controller

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Summary of Contents for Leslie PMC-1

  • Page 1: Table Of Contents

    DIAGRAMS & PARTS LIST 12501 Telecom Drive, Tampa FL 33637 PMC-1 ELECTRO-PNEUMATIC CONTROLLER T A B L E O F C O N T E N T S Specifications ......... . .2 Introduction .

  • Page 2: Specifications

    SPECIFICATIONS SUPPLY VOLTAGE: 115 VOLTS 50/60 HZ 230 VOLTS 50/60 HZ 24V DC OPERATING VOLTAGE RANGE: 90 TO 110% OF RATED VOLTAGE POWER CONSUMPTION: 10 WATTS (MAX.), .7W STEADY STATE INPUT: 4 - 20 mA (STD), PROTECTED AGAINST ACCIDENTAL 24V INPUT TO THE CURRENT INPUT TERMINALS RTD (OPTIONAL) 4-20 mA(STD), ACCURACY ±5% SPAN;...
  • Page 3 PMC CONTROLLER MOUNTING DIMENSIONS INCHES [MM] Electrical Signal A.C. Power (Input/Output) Pneumatic Input 100 psi Max. Vent Pneumatic Output FIGURE 1...

  • Page 4: Introduction

    Field Wiring: of the two internal air solenoid valves. One valve increases 1. After mounting the PMC-1 at the desired location, open output air pressure and the other bleeds it. Each time a pulse the cover by loosening 5 screws and the thumb screw.

  • Page 5: Start-Up

    Terminals 13, 14, 15 are used to connect the optional solution and bubble tight. local control module model RCS-90. This module can be used if the PMC-1 is mounted at a remote location from a WARNING - Keep stop valves closed until all control valve.

  • Page 6: Troubleshooting

    “REM/ZERO” Default to “ZERO” set point on loss of signal. rating of the equipment served, whichever is less. 5) If the PMC-1 is being used for controlling slow reacting 12) Push the mode select button until the “SP” LED lights processes like temperature and level, select the control for- up.
  • Page 7 CONNECTING AN RTD TO THE PMC PMC-1 TB-2 16 17 18 Usually black Black Approximate resistance = 0 Ω Approximate resistance @ 75°F = 109 Ω Unused terminal (not connected) Terminal colored red or other contrasting color 3 Wire RTD Head FIGURE 5 Wiring Connections for Two—Wire RTD (temperature)
  • Page 8 PMC-1 operates but no display, replace LCD display. 6) Too much air pressure to PMC-1 4) Controller does not respond to changes in local set point a) If too much air pressure is supplied to the PMC-1, it adjustment. can overload the actuator or regulator diaphragm...
  • Page 9 -OR- -OR- CONNECTS INTERNAL PROCESS SPEED CONTROL CIRCUIT, TO STEERING JUMP WHEN RTD SIGNAL CONDITONAL CARD IS INDSTALLED IN THE PMC-1. CIRCUIT DECIMAL POINT SELECT, REFER TO SECTION D, PARA. 7. CONNECTS DERIVATIVE CIRCUIT OUTPUT SIGNAL TO TB-2 PIN9 (AUX 2). IF USED, REMOVE JUMPER J2.
  • Page 10 Voltage (Chart Recorder) = 450Ω x .020 = 9 V The PMC-1’s power supply puts out a total of 24 VDC to the Total Voltage = 2.7(PMC-1) + 12(dp Transmitter) + transmitter circuit.
  • Page 11 (4-20 mA) . In most cases, there is actually a other variables are classified as 2-wire or 4-wire, depending third wire leading from the transmitter, but it is still referred on how they are powered. The PMC-1 can be used with either to as 2-wire. type of transmitter.
  • Page 12 The signal conditioning card converts the voltage signal temperature with an RTD and optional built-in signal into a 4-20mA signal, which can be used by the PMC-1. conditioning card, consideration must be given to the distance The wire connecting the RTD to the PMC-1 provides additional of the RTD from the PMC-1 controller.
  • Page 13 PMC-1 and control valve is complete. On loss of power, the solenoid is no longer If the AC power to the PMC-1 should fail for any reason, both energized, and ports A and B are connected, allowing the internal solenoid valves will remain closed, and the control pressure on the actuator diaphragm to vent to atmosphere.
  • Page 14 Cold in Trap The Leslie PMC-1 electro-pneumatic controller provides an the set point. The PMC-1’s “slow loop” control mode can be accurate, economical alternative to conventional pneumatic selected for enhanced control in systems that respond slowly or electronic controllers. A standard RTD (resistance to control valve changes.
  • Page 15 Pressure transmitter Pigtail 24VDC A standard pressure transmitter is connected to the PMC-1 at tail is important in steam applications to avoid overheating the transmitter input terminals. The PMC-1 provides 24VDC the pressure transmitter. The loop in the pig tail maintains a...
  • Page 16 A standard differential pressure reference line is vented to atmosphere. A three-valve transmitter is connected to the PMC-1 at the transmitter is manifold is recommended for use with the dp transmitter to connected to the PMC-1 at the transmitter input terminals.
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