Product Overview

ManualsBrandsBard ManualsHVAC Replacement PartsAdvanced Solid State Dual Unit Lead/Lag Controller w/ Base Alarm Board

The MC4002 has 2 stages of cooling control available

for each connected air conditioner. It is designed for

systems with or without economizers and for systems with

2-stage or dual compressors. The 2

stage available for

each air conditioner permits complete and proper control

when economizers are installed or when 2-stage or dual

compressors are utilized. With the addition of a simple 2

wire humidity controller as an input signal, it can provide

electric reheat dehumidiﬁcation circuit. The controller can

also be conﬁgured for use with heat pumps. (NOTE: The

electric reheat dehumidiﬁcation feature is not available when

conﬁgured for heat pumps).

The MC4002, either in basic form or when equipped with

optional alarm relay boards, is a fully functional controller

with unique conﬁgurable capability. The MC4002 can be

ordered as a basic controller only or factory equipped with

one of two variations of alarm boards with varying amounts

of alarm capabilities to ﬁt the user’s requirements. Ethernet

communication option is also available.

If only the base controller is initially installed, it can be easily

upgraded by simple snap-in of the alarm relay board and

plug-in of the communication cable to the main controller

board. Form C dry contact alarm relays are used, offering

both NO and NC switching to meet the user’s speciﬁc alarm

protocol, providing complete ﬂexibility to meet any user’s

requirements. All alarm actuations are individually indicated

on the controller front panel, along with indication for active

stages of cooling or heating, and which unit is currently

“lead”. A digital display indicates building temperature and

is also used for all of the programming functions.

Controller:

• Electronic (non-mercury) design

• Programmable

• Works with or without economizers

• Dehumidiﬁcation control option

• Can be used with heat pumps

Alarm Boards:

• Can be speciﬁed with or without alarm boards

• Alarms boards can be added at any time

• Alarm circuits can be NO or NC logic

Communication Board:

• Ethernet remote access for all controller functions

• Can be factory or ﬁeld installed

• IPV6 with SNMP traps

Ease of Installation:

• Powered by 24V from A/C units

• Phasing of 24V from units is not required

• Durable metal enclosure adequately sized for ease

of conduit and wire installation

Certiﬁcations & Approvals:

• Complies with FCC Rule 15, Subpart B, Class A

• This ISM device also complies w/Canadian ICES-001

• Complies with CE Standards EN55011/EN50081

and EN55024 for ISM Equipment, Class A

• ETL Conforms to UL916 Standard for Energy

Management Equipment, Certiﬁed to CSA STD

C22.2 No. 205

AB3000-A Base Alarm Board

AB3000-B Enhanced Alarm Board

MC4002 Controller no alarms

MC4002-A Controller with Base Alarm Board

MC4002-B Controller with Enhanced Alarm Board

MC4002-AC Controller w/Base Alarm & Ethernet Board

MC4002-BC

Controller w/Enhanced Alarm & Ethernet Board

with SNMP Traps & IPV6

Key Design Features

Controller Models Available

Alarm Board Add-Ons (Field-Installed)

MC4002 Series Advanced Solid State Dual Unit Lead/Lag

Controller with Ethernet Remote Communication Option

CB5000 Ethernet Communication Board with

SNMP Traps and IPV6

Communication Board Add-Ons (Field-Installed)

• 20-Gauge Gray Pre-Painted Metal

• 9.25" W x 13.50" H x 3" D

• Hinged Cover

• Thirteen (13) .875" Diameter Knockouts

Controller Enclosure

8612-023A Remote Temperature Sensor w/35' Cable

Optional Equipment

Form No. S3548-1116

Supersedes NEW

Page 1 of 8

CONFORMS TO UL STD 916

CERTIFIED TO

CSA STD C22.2 NO. 205

7961-731

Comfort Mode

Press “Comfort” button once to reset to 72F/22C

Cooling and 68F/20C Heating for 1-hour. Display

will flash during override period. Press 2nd-time to

cancel during override if desired, or controller will

automatically revert to selected SP after 1-hour.

1. To swap lead and lag units press “ADVANCE”.

2. To enter the Program mode press the

“Program” button and release it when “Pro9”

appears. Use “DOWN” or “UP” arrows to

scroll through menu.

3. A “Flashing” display means that the function

or choice is “Set”, and the display will alternate

between the step function and setting.

4. To change the setting of any step press

the “Change” button and the display will

stop flashing, allowing change to the

setting by using the “Down” or “Up” arrows.

When desired setting is reached press the

“Save” button, and proceed as desired.

5. When done programming press the

“Program” button until display stops flashing

and room temperature is shown. If no buttons

are pushed within 30-seconds the controller

will automatically revert back to “Run” mode.

Operating Instructions

1st

Stage

2nd

Stage

Unit

3rd

Stage

4th

Stage

Cooling

Heating

Digital

Display

Dehumid.

Operation

Lead

Unit

1st

Stage

2nd

Stage

3rd

Stage

4th

Stage

Power Loss Sys. 1

Fire/Smoke Alarm

Low Temp. Alarm

High Temp. Alarm 1

High Temp. Alarm 2

Lead/Lag Controller

Failure Alarm

Power Loss Sys. 2

Refrig. Alarm Sys. 1

Refrig. Alarm Sys. 2

AB3000-B Alarm Board Functions

AB3000-A Alarm Board Functions

Off

Program

Advance

Change

Save

Comfort

Alarms

Alarm boards are optional

and can be factory or field

installed. See inside of

controller for any alarm

functions.

Solid State Dual Unit Lead Lag Controller

MC Series

Program Menu

NOTE: Push and hold Up or Down arrows for 1-second

until display blanks to move between steps.

1 Temperature at local (main) Sensor

2 Temperature at Remote 1 sensor location*

3 Temperature at Remote 2 sensor location*

4 Cooling setpoint temperature

(65 to 90F or 18.3 to 32.2C - Default is 77F/25C)

5 Deadband between cooling and heating setpoint

(2 to 40F or 1.1 to 22.2C - Default is 17F/9.4C)

6 Continuous blower operation

(None, Lead, Both - Default is None)

7 Degree display (F or C - Default is F)

8 Alternating Lead-Lag-Lead-Lag Sequence or

Non-Alternating Lead-Lead-Lag-Lag Sequence

(Yes or No - Default is Yes for Alternating)

9 Lead-Lag changeover time (Days)

(1 to 30 days, or 0 for disabled - Default is 7)

10 Heat pump logic enabled - only for 1-stage

heat pumps and forces Lead-Lag sequence

and overrides a Non-Alt setting

(Yes or No - Default is No)

11 Unit 1 and 2 blowers automatically both run if

delta T>5F between any 2 connected sensors

(Yes or No - Default is Yes)

12 3-minute lead unit & 4-minute lag unit off-delay enabled (Yes or No - Default is No)

13 Minimum of 3-minute compressor runtime enabled (Yes or No - Default is No)

14 Low temperature alarm setpoint (28 to 65F or 21.1 to 48.8C - Default is 45F/7.2C)

15 High temperature alarm Level 1 setpoint

(70F to 120F or 21.1 to 48.8C - Default is 90F/32.2C)

16 High temperature alarm Level 2 setpoint (70F to 120F or 21.1 to 49C - Default is 95F/35C)

17 Inter-stage differential from Stage 1 to 2 (2, 3, 4, 5 or 6F - Default is 4)

18 Inter-stage differential from Stage 2 to 3 (2 or 3F - Default is 2)

19 Inter-stage differential from Stage 3 to Stage 4 (2 or 3F - Default is 2)

20 Turn “On” above SP for Stage 1 Cooling (+1 or +2 - Default is +2)

21 Turn “Off” below SP for Stage 1 Cooling (-1, -2, -3, or -4F - Default is -2)

Note: For CSon and CSoF Stage 2, 3 and 4 Cooling are automatically same as Stage 1

22 All Heating stages are equal -/+ On & Off differential (-1/+1 or -2/+2 - Default is -2/+2)

23 1 or 2-stage compressor, if set to 1 the 2nd-Stage Cooling Alarm activates on Cooling Call 2

If set to 2 the 2nd-Stage Cooling Alarm activates on Cooling Call 3. (1 or 2 - Default is 1)

24 Controller is Locked. Consult building authority for further instructions.

r1 and r2 will display temperature only if optional remote sensors are installed.

If sensors are not installed these are omitted in the display sequence. If r1 and/or r2 sensor

installed the MC controller will control to the “average” of the connected sensors.

Consult installation instructions for additional details.

Summary of content (8 pages)

PAGE 1
MC4002 Series Advanced Solid State Dual Unit Lead/Lag Controller with Ethernet Remote Communication Option The MC4002 has 2 stages of cooling control available for each connected air conditioner. It is designed for systems with or without economizers and for systems with 2-stage or dual compressors. The 2nd stage available for each air conditioner permits complete and proper control when economizers are installed or when 2-stage or dual compressors are utilized.
PAGE 2
Feature Selection Guide MC4002 MC4002-A MC4002-AC MC4002-B MC4002-BC 2-unit lead/lag Yes Yes Yes Yes Yes Cooling stages 4 4 4 4 4 Heating stages (configured for A/C with electric heat) 2 2 2 2 2 Heating stages (configured for Heat Pump) 4 4 4 4 4 Yes Yes Yes Yes Yes Electronic Electronic Electronic Electronic Electronic Digital Digital Digital Digital Digital 4 cool/4 heat 4 cool/4 heat 4 cool/4 heat 4 cool/4 heat 4 cool/4 heat Lead unit LED Yes Yes Yes Yes
PAGE 3
Specifications/Features for Basic Controller MC4002 Basic Controller • Input power: 18 to 32VAC, 60/50Hz, power is supplied from A/C #1 and/or A/C #2. • Isolation circuitry: no line or low voltage phasing required. • Backup power: connection for -24VDC or -48VDC (-20 to -56V) maintains microprocessor operation, front panel indication, and alarm relay operation during commercial power outages. • Digital display: 4-character LCD • Temperature display: F or C • HVAC outputs: Form A (NO) relays (1A @ 24VAC).
PAGE 4
SPECIFICATIONS FOR OPTIONAL REMOTE COMMUNICATION BOARD CB5000 COMMUNICATION BOARD Note: If this communication board was not originally factory installed it can be field-installed at anytime. Bard part number is CB5000. Either the –A or –B alarm board is required for CB5000 to operate properly. It allows remote access via Ethernet, depending upon level of authority assigned, to all functions of the controller system the same as it one was in the building where the controller system is physically installed.
PAGE 5
USER PAGE 1. The designated Admin person can assign up to 9 additional users and set-up as Admin, Write or Read authority. 2. User Name and password must be assigned, each must be at least 3 characters long, and are case sensitive. 3. Only “Admin” can add, change or delete users and has access to all controller pages. 4. “Write” can make changes to the controller settings and operating characteristics, and has access to only Log In, System Status, Setpoints, and Log Out pages. 5.
PAGE 6
MC4002 Interior View MC4002-A Interior View (Also represents MC4002-B) MC4002-AC Interior View (Also represents MC4002-BC) AB3000-A Base Version Alarm AB3000-B Enhanced Alarm Board CB5000 Communication Board Mounting Hole Layout 9" 1 12" 11 13 32 " 6" 10" 21 1 32 " Form No.
PAGE 7
General Programming Overview MC4002 Controller Buttons and Function On/Off Button 1. 2. Press and release the On/Off button to turn On controller, 4-character display will illuminate and Lead unit LED will light. Press and release the On/Off button to turn Off controller. Controller will go dark and A/C units will stop. Comfort Button 1. 2. 3. 4. Press and release the Comfort button to change the Cooling Set Point to 72F and the Heating Set Point to 68F for a period of 1 hour.
PAGE 8
MC Series Solid State Dual Unit Lead Lag Controller 1st Stage 2nd Stage 3rd Stage 4th Stage Cooling 1st Stage 2nd Stage 3rd Stage 4th Stage Heating Alarms Digital Display Alarm boards are optional and can be factory or field installed. See inside of controller for any alarm functions. Power Loss Sys. 2 Refrig. Alarm Sys. 1 Refrig. Alarm Sys. 2 Fire/Smoke Alarm Low Temp. Alarm High Temp. Alarm 1 AB3000-A Alarm Board Functions AB3000-B Alarm Board Functions Power Loss Sys.