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mecair MPS Series - User Manual

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ELECTRONIC SEQUENCER with P CONTROL
Model “MPS”
Instruction Manual
MPSing001 – rev. 02
April 02
MECAIR S.r.l.
Diaphragm Valves and Electronic Controls for Dust Collector Filters
Via per Cinisello 97 – 20054 Nova Milanese – Milano – Italy
Phone ++39 0362 3751, Fax ++39 0362 367279
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Summary

Features

MPS Main Features

Lists key functionalities of the MPS model, including manual/automatic operation and specific control modes.

Technical Characteristics

Enclosure and Protection Rating

Details the enclosure material, cover type, and ingress protection rating (IP65).

Dimensions and Weight

Specifies the physical dimensions and approximate weight of the MPS unit.

Temperature and Connections

Information on operating and storage temperatures, and terminal block connection specifications.

Available Voltages and Power Consumption

Lists available input/output voltages, absorbed power, fuse details, and pulse/pause times.

Installation Specifications

Environmental and Placement Guidelines

Advises against direct sunlight, humidity, and vibrating structures for optimal performance.

Wiring and Cable Management

Instructions on cable entry, shape, and isolation from other wiring for safety and reliability.

Safety and Maintenance Precautions

Emphasizes professional installation, power disconnection during maintenance, and handling of damaged units.

Preliminary Checks

Power and Supply Verification

Ensures the unit has no power and verifies input/output voltage and frequency against specifications.

Electrical Connection of Valves

Terminal Block Connections

Details connecting valves to terminal blocks, including earthing requirements and common connections.

Isolation and Grounding Check

Procedure to measure isolation between ground and common terminals to prevent electrical disturbances.

Filtered Taps

Purpose and Design

Explains the function of filtered taps in detecting differential pressure and preventing clogging.

Installation Procedure

Step-by-step guide for drilling, sealing, and positioning filtered taps on the filter wall.

Connection to MPS Unit

Describes connecting filtered tap tubes to the MPS unit's pressure ports, noting correct port assignment.

Troubleshooting Inverted Connections

How to identify and resolve issues related to inverted filtered tap connections, including zero adjustment.

Start Up

Initial Checks and Voltage Selection

Verifies power supply and selects appropriate input and output voltages using jumpers.

Power Supply to Valves Configuration

Configures jumpers for selecting valve voltage (110V, 220V, 24V) and frequency (AC/DC).

Important Voltage and Frequency Caution

Warns against selecting 230V/DC for the outlets to prevent damage.

Start Up: Selection of Parameters

Mode Selection (Manual;Automatic)

Configures the operating mode: MANUAL (0) or AUTOMATIC (1).

Number of Valves Configuration

Sets the number of connected valves (e.g., MPS4, MPS8, MPS16).

Pulse Time Setting

Adjusts the duration of each valve pulse (0.01 to 9.99 seconds).

Pause Time Settings (Manual;Automatic)

Configures pause time between pulses for both MANUAL and AUTOMATIC modes.

Operating Delta-P Configuration

Sets the differential pressure threshold that triggers cleaning cycles.

Delta-P Alarm Setting

Defines the pressure threshold that activates an alarm.

Start Up: Selection of Parameters (Continued)

Shut Down Cleaning Cycles

Sets the number of cleaning cycles for SHUT DOWN CLEANING, with automatic start below 0.10 kPa.

Precoating Delta-P Setting

Configures pressure for PRECOATING to help form dust cake, with specific activation conditions.

Hour Counter Display

Instructions on how to read the operating hours (L and H displays).

AP Value Display

Explains how the display shows the current AP value in the filter.

LED Indicators for Valve Status

Describes the function of LED PULSE and LED PAUSE indicators.

General Operating Recommendations

Advice on setting parameters for efficient cleaning, bag longevity, and air consumption.

Shut Down Cleaning

Purpose and Activation

Removes residual dust at end of session; starts when AP drops below 0.10 kPa in AUTOMATIC mode.

Precoating Dependency for Activation

SHUT DOWN CLEANING requires AP PRECOATING to be exceeded for activation.

Precoating Function

Purpose and Activation Conditions

Delays cleaning to form dust cake; cleaning starts after AP PRECOATING is reached.

Reactivation and Dependency

Reactivation requires setting a new AP PRECOATING value; linked to SHUT DOWN CLEANING.

Remote Operation

Remote Activation Procedure

Steps to activate remote operation by removing a bridge and connecting an external contact.

Remote Functionality and Control

How to enable remote function by closing contacts and its effect on operation.

Remote Operation Commands

Details how to start/stop cleaning cycles by closing/opening the REMOTE and COMMON terminals.

Delta-P; Valves Select Button

Viewing AP and Valve Status

Explains how to use the DELTA-P/VALVES button to view AP and valve status.

Hour Counter

Reading Operating Hours

Details how the HOUR COUNTER tracks unit operating hours based on AP exceeding 0.10 kPa.

Zero Setting

When Zero Setting is Required

Perform only if display doesn't show zero after correct filtered tap installation.

Accessing and Adjusting the Trimmer

Procedure to access and adjust the TRIM1 [25] trimmer for zero display value.

Adjustment Steps

Steps to adjust the zero AP using a trimmer after ensuring the fan is off.

Display Messages

Alarm and Status Indicators

Explains common display messages like PP1 (ALARM AP), PPP (Max AP), P--- (AP < 0kPa), and SB (REMOTE active).

Troubleshooting P- Message

Steps to resolve P--- message, involving checking connections and using the zero trimmer.

Troubleshooting Guide

No Power or LED Issues

Addresses issues like a blank display, all LEDs off, or LED OK being off, pointing to power or microprocessor faults.

Valve Operation Problems

Troubleshoots ignored valves, interrupted coils, or incorrect voltage supply to valves.

Pulsing Sequence Issues

Diagnoses problems where the pulsing sequence is shown but valves are not functioning.

Delta-P Value Playback (Option)

4-20 mA Output Connection

Details how to connect the 4-20 mA output for broadcasting AP values to other units.

Connecting to Remote Display

Instructions for connecting the MPS to a remote display unit using a shielded cable and specific resistances.

Component Legend

LED Indicators

Lists and describes the function of various LED indicators on the unit (PAUSE, PULSE, AUTO, OK, etc.).

Buttons and Controls

Identifies and describes the function of push buttons like SELECT MENU and DELTA P/VALVES.

Terminals and Components

Lists and describes various terminals, jumpers, fuses, and the trimmer.

MPS 4-16 General Assembly Diagram

Menu and Button Layout

Diagram showing the layout of the menu options and push buttons on the front panel.

Terminal Block Identification

Illustrates the terminal block layout for power supply, voltage setting, and valve connections.

Internal Component Placement

Shows the placement of internal components like fuse, jumpers, and adjustment trimmers.

MPS 4-16 Front Panel Layout

Display and Button Functions

Details the front panel display and the functions of the SELECT MENU and DELTA-P/VALVES buttons.

Menu Option Mapping

Maps the menu numbers to specific parameters like AUTOMATIC/MANUAL, PULSE TIME, and DELTA-P.

Remote Connection Interface

Shows the terminals for remote start connection and the differential pressure inlet.

mecair MPS Series Specifications

General IconGeneral
Operating temperature-20°C to +70°C
Voltage24 VDC or 110/230 VAC
EnclosureAluminium die cast IP65 (NEMA 4)
Input Voltage24 VDC or 110/230 VAC
Protection ClassIP65 (NEMA 4)

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