Bard MC4002 User Manual

Page 1 of 61
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

Bard MC4002 Specifications

General

Brand	Bard
Model	MC4002
Category	Controller
Language	English

Summary

Getting Other Information and Publications

Shipping Damage

General

Theory of Operation

Controller Certifications

Specifications/Features for Basic Controller

Mounting the Controller

Instructions for physically installing the controller unit in its designated location.

Temperature Sensors

Details about the standard and optional temperature sensors used with the controller.

Temperature Sensor Logic

Basic MC4002 Controller Input/Output Specifications

MC4002 Controller Connections

Specifies the terminal connections for the MC4002 controller's inputs and outputs.

Specifications/Features for Alarm Boards

MC4002-A w/Optional Base Alarm Board (Inputs/Outputs)

Lists inputs and outputs for the MC4002-A alarm board.

MC4002-B w/Enhanced Version Alarm Board (Additional Outputs)

Lists additional outputs for the MC4002-B 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 Function

Explains the function of each button on the MC4002 controller's front panel.

Controller Programmable Features and Default Settings

Humidity Reduction Options

Synchronized Dehumidification Option

Details how to implement dehumidification using a humidistat and synchronized operation.

Hot Gas Reheat Dehumidification Option

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

1-Stage Compressor Units No Economizer

Sequence for cooling operation with 1-stage compressors and no economizer.

2-Stage Compressor Units No Economizer

Sequence for cooling operation with 2-stage compressors and no economizer.

1-Stage Compressor Units with EIFM Economizers

1-Stage Compressor Units with ECONWM* or WECOP Economizers

2-Stage Compressor Units with EIFM Economizers

Cooling Operating Sequences for Non-Alternating Lead/Lead/Lag/Lag Configuration

2-Stage Compressor Units No Economizer

Cooling sequences for non-alternating 2-stage units without economizers.

1-Stage Compressor Units with EIFM Economizers

Cooling sequences for non-alternating 1-stage units with EIFM economizers.

1-Stage Compressor Units with ECONWM* or WECOP Economizers

2-Stage Compressor Units with EIFM Economizers

2-Stage Compressor Units with ECONWM* or 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

Specifications for the CB5000 Series communication board.

To Access the System

LED Light Diagnostics

Explains the meaning of different LED lights on the CB5000 board.

Operating System

Notes on accessing the system without special software.

System Status Page

IP Setup

Configuration settings for the network interface, including IP address and gateway.

Setpoints Page

General Setpoints

Details the general setpoints for controller configuration, with default values.

Alarm Board Setpoints

Configuration of alarm thresholds for low and high temperatures.

System Overrides

Options for overriding system operation, like cooling/heating overrides.

Users Page

Notification Setup Page

Email Notifications

Configuration for sending email alerts for specific system events.

Network Traffic Limitation

Set the Trap Destination

MIB File Structure Contents

Log Out Button

Controller Wiring

Security (Locking) Feature

Locking and Unlocking the MC4002 Controller

Procedure to lock and unlock the controller to prevent unauthorized changes.

Generator Run Feature

Backup DC Power Connection

Controller Connections Diagrams

Table 1 Controller Connections Diagrams Index

An index listing various controller connection diagrams and their corresponding page numbers.

Controller Connections Diagram 1

1-Stage (W**AB/W**LB/W**AC Series) Air Conditioners - No Economizers

Wiring diagram for 1-stage AC units without economizers.

Controller Connections Diagram 2

1-Stage (W**AB/W**LB/W**AC Series) Air Conditioners – No Economizers with Alarm Board & CB5000 Series Communication Board

Wiring for 1-stage AC units with alarm board and CB5000.

Controller Connections Diagram 3

1-Stage (W**AB/W**LB/W**AC Series) Air Conditioners with JADE™™ Economizers

Wiring diagram for 1-stage AC units with JADE economizers.

Controller Connections Diagram 4

1-Stage (W**AB/W**LB/W**AC Series) Air Conditioners with JADE™™ Economizers and Alarm Board & CB5000 Series Communication Board

Wiring for 1-stage AC units with JADE economizers, alarm board, and CB5000.

Controller Connections Diagram 5

2-Stage (W*SAC Series) Air Conditioners – No Economizers

Wiring diagram for 2-stage AC units without economizers.

Controller Connections Diagram 6

2-Stage (W*SAC Series) Air Conditioners – No Economizers with Alarm Board & CB5000 Series Communication Board

Wiring for 2-stage AC units with alarm board and CB5000.

Controller Connections Diagram 7

2-Stage (W*SAC Series) Air Conditioners with JADE™™ Economizers

Wiring diagram for 2-stage AC units with JADE economizers.

Controller Connections Diagram 8

2-Stage (W*SAC Series) Air Conditioners with JADE™™ Economizers and Alarm Board & CB5000 Series Communication Board

Wiring for 2-stage AC units with JADE economizers, alarm board, and CB5000.

Controller Connections Diagram 9

1-Stage (W**AA/W**LA Series) Air Conditioners – No Economizers

Wiring diagram for 1-stage AC units without economizers.

Controller Connections Diagram 10

1-Stage (W**AA/W**LA Series) Air Conditioners – No Economizers with Alarm Board & CB5000 Series Communication Board

Wiring for 1-stage AC units with alarm board and CB5000.

Controller Connections Diagram 11

1-Stage (W**AA/W**LA Series) Air Conditioners with WECOP Economizers

Wiring diagram for 1-stage AC units with WECOP economizers.

Controller Connections Diagram 12

1-Stage (W**AA/W**LA Series) Air Conditioners with WECOP Economizers and with Alarm Board & CB5000 Series Communication Board

Wiring for 1-stage AC units with WECOP economizers, alarm board, and CB5000.

Controller Connections Diagram 13

1-Stage (WA/WL, W**A/W**L Series) Air Conditioners – No Economizers

Wiring diagram for 1-stage AC units without economizers.

Controller Connections Diagram 14

1-Stage (WA/WL, W**A/W**L Series) Air Conditioners – No Economizers with Alarm Board & CB5000 Series Communication Board

Wiring for 1-stage AC units with alarm board and CB5000.

Controller Connections Diagram 15

1-Stage (WA/WL, W**A/W**L Series) Air Conditioners with ECONWM* Economizers

Wiring diagram for 1-stage AC units with ECONWM economizers.

Controller Connections Diagram 16

1-Stage (WA/WL, W**A/W**L Series) Air Conditioners with ECONWM* Economizers and with Alarm Board & CB5000 Series Communication Board

Wiring for 1-stage AC units with ECONWM economizers, alarm board, and CB5000.

Controller Connections Diagram 17

1-Stage (WA/WL, W**A/W**L Series) Air Conditioners with EIFM Economizers

Wiring diagram for 1-stage AC units with EIFM economizers.

Controller Connections Diagram 18

1-Stage (WA/WL, W**A/W**L Series) Air Conditioners with EIFM Economizers and with Alarm Board & CB5000 Series Communication Board

Wiring for 1-stage AC units with EIFM economizers, alarm board, and CB5000.

Controller Connections Diagram 19

2-Stage (WA*S/WL*S Series) Air Conditioners – No Economizers

Wiring diagram for 2-stage AC units without economizers.

Controller Connections Diagram 20

2-Stage (WA*S/WL*S Series) Air Conditioners – No Economizers with Alarm Board & CB5000 Series Communication Board

Wiring for 2-stage AC units with alarm board and CB5000.

Controller Connections Diagram 21

2-Stage (WA*S/WL*S Series) Air Conditioners with ECONWM* Economizers

Wiring diagram for 2-stage AC units with ECONWM economizers.

Controller Connections Diagram 22

2-Stage (WA*S/WL*S Series) Air Conditioners with ECONWM* Economizers and with Alarm Board & CB5000 Series Communication Board

Wiring for 2-stage AC units with ECONWM economizers, alarm board, and CB5000.

Controller Connections Diagram 23

2-Stage (WA*S/WL*S Series) Air Conditioners with EIFM Economizers

Wiring diagram for 2-stage AC units with EIFM economizers.

Controller Connections Diagram 24

2-Stage (WA*S/WL*S Series) Air Conditioners with EIFM Economizers and with Alarm Board & CB5000 Series Communication Board

Wiring for 2-stage AC units with EIFM economizers, alarm board, and CB5000.

Controller Connections Diagram 25

W**HB/W**HC Series Heat Pumps – No Economizers

Wiring diagram for heat pumps without economizers.

Controller Connections Diagram 26

W**HB/W**HC Series Heat Pumps – No Economizers and with Alarm Board & CB5000 Series Communication Board

Wiring for heat pumps with alarm board and CB5000.

Controller Connections Diagram 27

WH/W**H/SH/S**H Heat Pumps - No Economizers

Wiring diagram for heat pumps without economizers.

Controller Connections Diagram 28

WH/W**H/SH/S**H Heat Pumps – No Economizers and with Alarm Board & CB5000 Series Communication Board

Wiring for heat pumps with alarm board and CB5000.

Controller Connections Diagram 29

Single Unit with Alarm Board

Wiring diagram for a single unit application with an alarm board.

Alarm Wiring

2nd Stage Cooling Alarm

Details on the optional 2nd stage cooling alarm output and its use.

Refrigerant Pressure Alarms

How to connect and use refrigerant pressure lockout alarms.

Emergency Ventilation Sequence

Describes two sequences for emergency ventilation using economizers.

Alarm Board Connections for Normally Closed "NC" Open-On-Alarm Strategy

Alarm Board Connections for Normally Open "NO" Close-On-Alarm Strategy

Programming Instructions

MC Series Controller Reference

Operating Instructions

Guides on swapping units, entering program mode, and using controller buttons.

Comfort Mode

How to activate and cancel the temporary 1-hour comfort setpoint adjustment.

Program Menu

Explains how to navigate and change settings within the controller's programming menu.

Parts List

Temperature Sensor Table Notes