Attachment_8_142010-26-0153.pdf

PDF 962 KB Posted Aug 3, 2026

Attached to: NWS HVAC PREVENTIVE MAINTENANCE (PM) ML in Ohio
Solicitation number: 1305M326Q0387
Issued by: Department of Commerce National Oceanic and Atmospheric Administration

About this file

Written by GovTribe AI · Aug 3, 2026

This is a product specification and operational manual for the MC4002 Series Advanced Solid State Dual Unit Lead/Lag Controller with optional Ethernet remote communication capability, manufactured by Bard Manufacturing Company.

The MC4002 is an electronic, non-mercury, programmable controller designed for dual air conditioning systems with 2 stages of cooling control per unit (4 total stages). It operates with or without economizers and supports 2-stage or dual compressor configurations. The controller can be configured for heat pump applications and includes optional dehumidification control capabilities. Five controller models are available: MC4002 (basic, no alarms), MC4002-A (with base alarm board), MC4002-B (with enhanced alarm board), MC4002-AC (base alarm with Ethernet), and MC4002-BC (enhanced alarm with Ethernet and SNMP/IPV6 support). Optional add-on boards include the AB3000-A base alarm board and AB3000-B enhanced alarm board for field installation, plus the CB5000 Ethernet communication board. Key specifications include 24VAC power supply, 4-character LCD digital display, Form A and Form C dry contact relays, programmable cooling/heating setpoints (65-90°F), adjustable inter-stage differentials, lead/lag changeover capability (1-30 days), and support for up to 2 optional remote temperature sensors. The controller features 20-gauge metal enclosure (9.25"W x 13.50"H x 3"D) with thirteen knockouts, operates in temperature ranges from 0-120°F, maintains accuracy of ±1°F (60-85°F), and includes memory preservation on power loss. The CB5000 Ethernet board provides remote access via web interface with configurable user authority levels (Admin, Write, Read) supporting both Static IP and DHCP network configurations with IPV6 compatibility.

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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. 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

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

Optional Equipment

Form No.	S3548-821
Supersedes	S3548-618
Page	1 of 12

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 Instructions1st Stage

2nd Stage

Unit #1

Unit #2

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

-B

A lar m B oa rd

F un cti on s

-A

A lar m B oa rd

F un cti on s

On 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.

Note 1:	Optional remote 35-foot space temperature sensors available, Bard PN 8612-023B. Controller automatically detects any connected sensors.
Note 2:	Multiple Sensor Control Strategy:
	A.	If only the standard local sensor is used, it will govern space temperature control along with low and high temperature alarm monitoring.
	B.	If 1 remote sensor is installed and connected, the temperature readout display and the building temperature are controlled to an average of connected sensors.
		If there is more than 10F difference between the two sensors, the actual control will be governed by the hottest sensor for cooling and the coldest sensor for heating.
Note 3:	Requires optional field installed humidity controller that closes on-rise, Bard PN 8403-038 recommended. Both HVAC unit must be equipped with electric
			heat for this sequence to work properly.

Form No.	S3548- 821
Supersedes	S3548- 618
Page	2 of 12

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

Selectable Inter-Stage & On/Off Differentials Yes Yes Yes Yes Yes

Temperature control type Electronic Electronic Electronic Electronic Electronic

Display (4 character .375" high LCD) Digital Digital Digital Digital Digital

Stage “On” LED 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 Yes

Advance (switch) lead unit feature Yes Yes Yes Yes Yes

One button comfort (72F Cooling, 68F Heating for 1-hour) feature Yes Yes Yes Yes Yes

Local sensor (standard with controller) Yes Yes Yes Yes Yes

Remote sensors option (See Notes 1 and 2) 2 2 2 2 2

Controller locking feature (prevents unauthorized changes) Yes Yes Yes Yes Yes

Smoke/fire lockout circuit (immediate shutdown of controller & A/C) Yes Yes Yes Yes Yes

Generator run feature (inhibits lag A/C unit operation) Yes Yes Yes Yes Yes

Humidity control feature (See Note 3) Yes Yes Yes Yes Yes

Heat pump control feature Yes Yes Yes Yes Yes

Selectable continuous fan control, lead-both-none Yes Yes Yes Yes Yes

Both fans On @ 5F delta T between 2 sensors (selectable) Yes Yes Yes Yes Yes

Control strategy to limit excessive compressor cycling Yes Yes Yes Yes Yes

-24/48Vdc backup power connection for emergency alarms Yes Yes Yes Yes Yes

20-gauge metal controller enclosure Yes Yes Yes Yes Yes

Power loss alarm relay for both units No Yes Yes Yes Yes

HP/LP refrigerant lockout alarm relay for both units No Yes Yes Yes Yes

Smoke/fire alarm relay No Yes Yes Yes Yes

Low temperature alarm thermostat and relay No Yes Yes Yes Yes

High temperature #1 alarm thermostat and relay No Yes Yes Yes Yes

Power loss alarm LED for both units No Yes Yes Yes Yes

HP/LP refrigerant lockout LED for both units No Yes Yes Yes Yes

Smoke/fire LED No Yes Yes Yes Yes

Low temperature alarm LED No Yes Yes Yes Yes

High temperature #1 alarm LED No Yes Yes Yes Yes

Ethernet Communication Board for Remote Connectivity No No Yes No Yes

SNMP (Simple Network Management Protocol) traps and IPV6 No No Yes No Yes

High temperature #2 alarm relay No No No Yes Yes

2nd stage cooling alarm relay No No No Yes Yes

Controller failure alarm relay No No No Yes Yes

Economizer relay (emergency vent strategy) No No No Yes Yes

High temperature #2 alarm LED No No No Yes Yes

Controller failure alarm LED No No No Yes Yes

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).
•	Cooling control stages: 2 for each A/C unit (4 total).
•	Heating control stages: 1 for each A/C unit, 2 for each heat pump if so configured.
•	Dehumidification circuit: requires optional humidity controller that closes on-rise as input signal, Bard Part #8403-038

recommended. Both HVAC units must be equipped with electric heat for this sequence to work properly.

•	Locking feature, allows controller to be “locked” so no unauthorized changes to programming can be made.
•	Operating temperature range: 0 to 120F (-18 to 49C)
•	Storage temperature range: -20 to 140F (-29 to 60C)
•	Temperature accuracy:	+/- 1F from 60-85F (16-30C)
		+/- 1% outside 60-85F
•	Lead/lag changeover time: 0 to 30 days
•	Timing accuracy: +/- 1%
•	Inter-stage time delay: 10 seconds between stages
•	Inter-stage differential: Adjustable – See Controller Programmable Features (Page 6).
•	On-Off differential: – See Controller Programmable Features (Page 6).
•	Cooling set point range: 65 to 90F (18 to 32C)
•	Comfort setting-Cooling 72F, Heating 68F, for 1 hour
•	Dead band (difference between cooling and heating set points): 2F to 40F (1C to 24C)
•	Fire/smoke interface: standard NC circuit jumper, remove for connection to building system control, shuts down both

A/C units immediately. Field supplied fire/smoke device must have normally closed (NC) dry contact rated at 2A 24VAC minimum. Shielded cable (22-gauge minimum) must be used and shield grounded to controller enclosure.

•	Generator run feature, inhibits lag A/C unit from operating if generator is operating (to limit amperage).
•	Memory: EEPROM for set point and changeable parameters (maintains settings on power loss).
•	Space temperature sensors: 1 local is standard, will accept up to 2 optional 35-foot remote sensors. When multiple

sensors are used temperatures are averaged.

•	LEDs for basic controller: Lead unit, Cooling stages 1 through 4, Heating stages 1 through 4, Dehumidification operation.
•	Six (6) Push-button controls: On/Off switch-Change lead unit-Increase and Decrease set points-Program/Save-Comfort.
•	Controller Enclosure: 20-gauge pre-painted steel, 9.25"W x 13.50"H x 3.00"D, hinged cover, thirteen (13) .875"

diameter electrical knockouts.

Specifications/Features for Alarm Boards MC4002-A w/Optional Base Alarm Board (Inputs/Outputs)

•	Refrigerant alarm from A/C #1, input
•	Refrigerant alarm from A/C #2, input
•	Power loss alarm A/C #1, Form C (SPDT) output
•	Power loss alarm A/C #2, Form C (SPDT) output
•	Smoke/fire alarm, Form C (SPDT) output
•	Low temperature alarm, Form C (SPDT) output
•	1st stage (H1) high temperature alarm, Form C (SPDT) output
•	Refrigerant system lockout A/C #1, Form C (SPDT) output
•	Refrigerant system lockout A/C #2, Form C (SPDT) output

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

•	All alarm inputs/outputs same as base version above, plus:
•	2nd stage (H2) high temperature alarm, Form C (SPDT) output
•	2nd stage cooling alarm, Form C (SPDT) output
•	Controller system failure alarm, Form C (SPDT) output
•	Emergency ventilation economizer outputs, Form A (SPNO) for both A/C #1 and A/C #2

o Emergency ventilation option for either air conditioner with refrigerant alarm @ H1 high temp alarm set point o Emergency ventilation option for both air conditioners @ H2 high temp alarm set point

Note:	All alarm/output relays are dry contacts rated
	1A @ 24VAC, 1A @ 30VDC, 0.5A @ 150VDC

Alarm relays can be wired for NO (close on alarm) or NC (open on alarm) strategy.

Alarm relays can be used individually if there are enough available building alarm points, or can be arranged into smaller groups or even a single group so that all alarm capabilities can be utilized.

When multiple alarms are grouped together and issued as a single alarm, there will be no off-site indication of which specific problem may have occurred, only that one of the alarms in the group has been triggered. The individual alarm problem will be displayed on the LED display on face of the controller.

Form No.	S3548-821
Supersedes	S3548-618
Page	3 of 12

Form No.	S3548- 821
Supersedes	S3548- 618
Page	4 of 12

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.

Required Input Connections to the CB5000 (these are all internal connections from either the alarm board or main controller board):

1.	Fire/smoke connection from MC4002 main
	controller board.
2.	Refrigerant lockout inputs.
3.	If economizers are used an additional 24V
	signal wire is required from each air conditioner
	to the controller system.
4.	Communication cable from CB5000 plugs into
	phone jack connection on main MC4002
	controller board.

OPERATING SYSTEM

No special software is required to access the system.

The CB5000 has a default address, simply follow these instructions:

TO ACCESS THE SYSTEM

1.	Connect CAT 5 or CAT 6 Ethernet cable from
	computer to Ethernet port on the CB5000.
2.	Change your computer’s IP address as shown
	below to gain initial access to the CB5000.

For XP or Windows 2000:

1.	Open Control Panel, double click Network
	Connections.
2.	Double click Local Area Connection on the
	General tab and select Properties.
3.	Using the General tab, scroll to Internet
	Protocol (TCP/IP).
4.	Highlight Internet Protocol (TCP/IP) and select
	Properties.
5.	Change the addresses as follows:
	IP address:		192.168.1.50
	Subnet mask:		255.255.255.0
	Default gateway:		192.168.1.1
	Preferred DNS server:	192.168.1.10
	Alternate DNS server:	192.168.1.11
6.	Click OK and close all windows.
7.	Start your browser, enter the CB5000’s default
	IP address 192.168.1.67 and hit Enter.
8.	The MC4000 log-in page should appear.

For Vista or Windows 7:

1.	Open Control Panel, click Network & Internet.
2.	Click Network & Sharing Center.
3.	Click Local Area Network link.
4.	Click Properties.
5.	Highlight Internet Protocol Version 4 (TCP/
	IPV6) and select Properties.
6.	Change the addresses as follows:
	IP address:		192.168.1.50
	Subnet mask:		255.255.255.0
	Default gateway:		192.168.1.1
	Preferred DNS server:	192.168.1.10
	Alternate DNS server:	192.168.1.11
7.	Click OK and close all windows.
8.	Start your browser, enter the CB5000’s default
	IP address 192.168.1.67 and hit Enter.
9.	The MC4000 log-in page should appear.

1.	Type in “Admin” for the user name and “Bard”
	for the password. These are case sensitive.
	Hit “Log In”.
2.	Click the “System Setup” button.

SYSTEM SETUP PAGE

Note: If the remote user is on a different subnet than the CB5000 it is recommended that Static IP Addressing be used rather than DHCP.

IF YOUR NETWORK USES STATIC IP ADDRESSING

1.	Enter the correct address information
	provided by your IT department and click the
	“Save Config” button.
2.	The assumption is that the new IP address
	has already been configured into the network
	to get through any firewall(s).
3.	Disconnect the Ethernet cable from the
	computer and plug into your router.
4.	Change your computer system’s IP address
	back to their previous settings from Note 1.
5.	Type the new IP address into the browser and
	make any changes to the MC4000 system
	before logging out.

IF YOUR NETWORK USES DHCP

1.	Check the “Enable DHCP” box.
2.	Click “Save Config” box (it will take several
	seconds before you receive a message that
	you are now offline. At this point the unit is
	now running in DHCP mode).
3.	Change your computer system’s IP address
	back to their previous settings from Note 1.
4.	Type CB5000 in the browser’s URL address
	bar to access the CB5000.

NOTE 1: Record your computer’s current IP settings BEFORE making any changes. You will need to reset back to these original settings once you’ve assigned an IP address to the CB5000.

NOTE 2: If you need to get back to the CB5000 default IP setting simply hold the reset button next to the phone jack for 5+ seconds, then release.

Form No.	S3548-821
Supersedes	S3548-618
Page	5 of 12

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.	“Read” can only view Status and Setpoints
	pages and cannot make any changes.

SYSTEM STATUS PAGE

1.	This page shows the overall HVAC status of:
a.	Active cooling or heating stages or
	dehumidification mode (requires humidity
	sensor)
b.	Active controller outputs (blower, cooling
	Stage 1 or 2, heating) to each air conditioner
c.	Which unit is the Lead unit
d.	Power loss or refrigerant lock-out for each
	air conditioner
e.	If economizers are used if on or off
	(Note: older style EIFM economizers require
	a simple relay kit for this feature to work,
	Bard Part Number 8620-221)
2.	General status of:
a.	Dehumidification Active or not
b.	Backup Generator Active or not (if tied to
	generator run controls to inhibit lag unit
	operation during generator run)
c.	Alarm board connected or not
d.	Controller system Locked or Unlocked
e.	Comfort mode Active or not
3.	Temperatures:
a.	Average temperature (if more than one
sensor used, if not will read same as Local
sensor)
b.	Local sensor at controller
c.	Remote 1 or Remote 2 if connected

4.	General Alarm Status:
a.	Fire/Smoke, Clear or Alarm
b.	Low Temp, Clear or Alarm
c.	High Temp #1, Clear or Alarm
d.	High Temp #2, Clear or Alarm
e.	Controller Failure, Clear or Alarm

SETPOINTS PAGE (Note: “Read” level authority can view this screen but cannot make any changes.

“Admin” and “Write” authority can make changes)

1.	General Setpoints
a.	On initial installation and start-up all
	selectable characteristics are set to factory
	default settings.
b.	Each of these points has a drop-down
	menu for ease of use.
2.	Alarm Board Setpoints
a.	Low temperature alarm setpoint
b.	High temperature alarm #1 setpoint
c.	High temperature alarm #2 setpoint
3.	System Overrides
a.	System 1 Cooling Override
b.	System 1 Heating Override
c.	System 2 Cooling Override
d.	System 2 Heating Override
e.	Turn Power On to the System
	(Note: Cannot remotely turn the controller
	system Off)
f.	Lock/Unlock Controller
g.	Advance Lead to Lag Unit
h.	Comfort Mode
i.	Restore System Defaults
j.	Reset Controller. There are built-in
	routines to prevent the controller system
	from getting “locked up”, but this also
	allows a manual remote reset as a backup
	before having a service call to the site.

LOG OUT BUTTON

1.	Clicking this button will automatically log you
	off the controller remote access.
2.	To log back in will require entering assigned
	IP address into your browser and entering
	valid User Name and Password.

CONNECT TO NETWORK

1.	After initial set-up using laptop computer,
	disconnect computer cable from the Ethernet
	port and connect the CAT 5 or CAT 6 network
	cable.
2.	Remote access is now available using the
	assigned IP address and valid User Name
	and Password (case sensitive).

CB5000 COMMUNICATION BOARD

RESET BUTTON TO RETURN TO DEFAULT CONTROLLER SETTINGS

ETHERNET PORT

IP DEFAULT

ADDRESS

RESET

PHONE JACK

CONNECTION

TO MAIN

CONTROLLER

BOARD

Form No.	S3548- 821
Supersedes	S3548- 618
Page	6 of 12

21 1

10"

1 1 2 6"

MIS-3760

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

General Programming Overview MC4002 Controller Buttons and Function

On/Off Button

1.	Press and release the On/Off button to turn On controller, 4-character display will illuminate and Lead unit LED will light.
2.	Press and release the On/Off button to turn Off controller. Controller will go dark and A/C units will stop.

Comfort Button

1.	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.
2.	Set Points will return to the programmed settings automatically after 1 hour.
3.	Pressing the Comfort button during the 1 hour period will deactivate the Set Point change.
4.	The temperature display will flash the current temperature while in override mode.

Program Button

1.	Press the Program button and release it when the message “Prog” appears on the display.
2.	Refer to Programming Instructions and follow these commands to change from Default settings.

Advance/Change/Save Button

1.	Press and release the Advance button to swap lead and lag unit positions.
2.	When in Program mode the Down and Up buttons are used to scroll through the programming steps.
3.	A flashing display means that the particular function of that programming step is “set”, and the display will alternate between the step

function and the setting.

4.	To change the setting press the Change button and the display will stop flashing, allowing change to the setting.
5.	Use Down or Up arrows to change setting as desired, and press the Save button and proceed as desired.
6.	When done with programming changes press the Program button until display stops flashing and room temperature is shown.

Up and Down Buttons These buttons are used to change the settings in conjunction with the Advance/Change/Save button when in programming mode.

Controller Programmable Features and Default Settings

Form No.	S3548-821
Supersedes	S3548-618
Page	7 of 12

Order / Display Description Range / Choice Default

LSEn Temperature at local (main) sensor — —

SP Cooling set point temperature 65 to 90F (18 to 32C) 77F (25C) db Deadband between cooling SP and heating set point 2 to 40F (1 to 24C) 17F (9.4C) r1 Temperature at remote sensor 1 location, if connected — — r2 Temperature at remote sensor 2 location, if connected — — cFAn Continuous blower operation None, Lead, Both None deg Controller system operates in F or C F or C F

Alt Alternating Lead-Lag-Lead-Lag sequence or Non-Alternating Lead-Lead-Lag-Lag sequence — Yes = Alternating

Yes or No Yes

LLCO Lead-Lag changeover time (Days) 1 to 30 days, or 0 for disabled 7

Heat pump logic enabled — only for 1-stage heat pumps and forces Lead-Lag sequence (overrides a Non-Alt setting)

Yes or No No

Cbd5 Unit 1 and 2 blowers automatically both run if delta T >5F between any 2 connected sensors Yes or No Yes

OFde 3-minute lead unit & 4-minute lag unit off-delay enabled Yes or No No crun Minimum 3-minute compressor runtime enabled Yes or No No

LoAL Low temperature alarm setpoint 28 to 65F (-2 to 18C) 45F (7.2C)

HAL1 High temperature alarm level #1 setpoint 70F to 120F (21 to 49C) 90F (32C)

HAL2 High temperature alarm level #2 setpoint 70F to 120F (21 to 49C) 95F (35C)

Locd Controller is locked and no changes can be made. Consult building authority.

If locked, the display will show

Locd if changes attempted Unlocked

Inter-Stage Differential

ISd2 From Stage 1 to Stage 2 2, 3, 4, 5 or 6F 4

ISd3 From Stage 2 to Stage 3 2 or 3F 2

ISd4 From Stage 3 to Stage 4 2 or 3F 2

On/Off Differential (Hysterisis)

CSon Turn "On" above SP for Stage 1 Cooling +1 or 2F 2

CSoF Turn "Off" below SP for Stage 1 Cooling -1, 2, 3 or 4F -2

Stage 2, 3 and 4 Cooling automatically set same as Stage 1 decisions

HSoo All Heating Stages are equal -/+ on & off differential -1/+1 or -2/+2 -2/+2

CoPr 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 1 ob5d Differential between Local and On-Board Sensor 12 to 20, OFF 12

Form No.	S3548- 821
Supersedes	S3548- 618
Page	8 of 12