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Bard MC4002 Series - User Manual

Bard MC4002 Series
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MC4002 Series Solid State
Dual Unit Lead/Lag Controller
INSTALLATION INSTRUCTIONS
&
REPLACEMENT PARTS LIST
Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
www.bardhvac.com
Manual : 2100-614K
Supersedes: 2100-614J
Date: 4-1-21

Table of Contents

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Bard MC4002 Series Specifications

General IconGeneral
Controller TypeProgrammable Logic Controller (PLC)
Input Voltage24VDC
Operating Temperature0°C to 50°C (32°F to 122°F)
Flash Memory512 KB
Operating Voltage24VDC
Communication InterfacesRS-485, Ethernet

Summary

Getting Other Information and Publications

Shipping Damage

Procedure for handling equipment damaged during shipping.

General Operation

Overview of MC4002 controller usage and capabilities.

Theory of Operation

Explanation of how the controller manages two AC units for redundancy.

Controller Certifications

Basic Controller Specifications and Features

MC4002 Basic Controller Features

Input power, isolation, backup power, display, outputs, and stages.

Controller Mounting

Temperature Sensors

Temperature Sensor Logic

MC4002 Controller Input;Output Specifications

Controller Connections

Detailed list of terminal connections for units, sensors, and other inputs/outputs.

Alarm Board Specifications and Features

MC4002-A Base Alarm Board

Inputs and outputs for the standard alarm board.

MC4002-B Enhanced Alarm Board

Additional outputs for the enhanced alarm board.

Low Voltage Field Wiring

Controller Grounding

Controller Power-Up

Fire Suppression Circuit

Staging Delay Periods

Blower Operation

Advance (Swap) Lead;Lag Unit Feature

Accelerate Timer Feature

General Programming Overview

MC4002 Controller Buttons and Functions

Explanation of the controller's buttons and their operations.

Programmable Features and Default Settings

Humidity Reduction Options

Synchronized Dehumidification

Using a humidistat for synchronized dehumidification control.

Figure 1: Mechanical Humidistat Connection

Hot Gas Reheat Dehumidification Option

Figure 2: Electronic Humidistat Connection

Cooling Operating Sequences for Alternating Lead;Lag;Lead;Lag Configuration

1-Stage Compressor Units No Economizer

Cooling sequence for 1-stage units without economizers.

2-Stage Compressor Units No Economizer

Cooling sequence for 2-stage units without economizers.

Cooling Sequences for Alternating Configurations

1-Stage Compressor Units with EIFM Economizers

Cooling sequence for 1-stage units with EIFM economizers.

1-Stage Compressor Units with ECONWM* or WECOP Economizers

Cooling sequence for 1-stage units with ECONWM/WECOP economizers.

Cooling Sequences for Non-Alternating Lead;Lead;Lag;Lag Configuration

2-Stage Compressor Units No Economizer

Cooling sequence for 2-stage units without economizers.

1-Stage Compressor Units with EIFM Economizers

Cooling sequence for 1-stage units with EIFM economizers.

Cooling Sequences for Non-Alternating Configurations

1-Stage Compressor Units with ECONWM* or WECOP Economizers

Cooling sequence for 1-stage units with ECONWM/WECOP economizers.

2-Stage Compressor Units with EIFM Economizers

Cooling sequence for 2-stage units with EIFM economizers.

2-Stage Compressor Units with ECONWM* or WECOP Economizers

Cooling sequence for 2-stage units with ECONWM/WECOP economizers.

Heating Sequence of Operation

Air Conditioners with Electric Heat

Heating sequence for units with electric heat.

Heat Pumps with Electric Heat

Heating sequence for heat pumps with electric heat.

Specifications for Optional Remote Communication Board

CB5000 Series Communication Board

Features and requirements for the CB5000 communication board.

Network Configuration Steps

OS Specific Network Setup

Detailed steps for XP/2000 and Vista/Win7/Win10 network setup.

System Access and Status

Log In Page

Instructions for logging into the MC4000 HVAC Monitor.

System Status Page

Overview of the system's current operational status.

Network IP Addressing Methods

Static vs. DHCP IP Addressing

Guidance on selecting and configuring static or DHCP IP addresses.

Setpoints Configuration

General Setpoints

Configuration of primary temperature and operational setpoints.

User Management

Notification Setup

Email Notification Settings

Configure email alerts including SMTP, recipients, subject, and content.

Email Notification Configuration

Alarm Trigger Conditions

Select specific alarms that will generate email notifications.

SNMP and Network Settings

SNMP Trap Setup

Configure SNMP trap generation for selected system alarms.

Network Traffic and Trap Destination

Manage traffic and set trap reception parameters.

MIB File Structure and Configuration

MIB File Structure Contents

Details the structure of the MIB file for SNMP configuration.

Controller Wiring

Security and Generator;Power Features

Security Feature

Procedures for enabling and disabling the controller's security lock.

Generator Run and Backup Power

Using generator signals and connecting backup DC power.

Controller Connections Diagrams Index

1-Stage Air Conditioners - No Economizers

Wiring diagrams for 1-stage units without economizers.

1-Stage Air Conditioners with Alarm;Comm Boards

Wiring diagrams for 1-stage units with alarm/comm boards.

1-Stage Air Conditioners with JADE Economizers

Wiring diagrams for 1-stage units with JADE economizers.

Alarm Wiring

2 nd Stage Cooling Alarm

Refrigerant Pressure Alarms

Emergency Ventilation Sequence

Figure 3: Alarm Board Connections for Normally Closed NC Open-on-Alarm Strategy

Figure 4: Alarm Board Connections for Normally Open NO Close-on-Alarm Strategy

Programming Instructions

MC Series Controller Overview

Operating Instructions

Steps for swapping units, entering program mode, and changing settings.

Comfort Mode

How to activate temporary comfort settings for cooling and heating.

Figure 3: Parts List Description Diagram

Parts List

Table 2: Temperature Sensor Table

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