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Manual 2100-614I 
Page 

7 of 43

LOW VOLTAGE FIELD WIRING

The MC4002 is powered from the air conditioners that it 
is controlling, 24 VAC (18-32V) low voltage only.
Circuitry in the MC4002 isolates the power supplies of 
the two air conditioners so that no back feeds or phasing 
problems can occur.  Additionally, if one air conditioner 
loses power, the MC4002 and the other air conditioner 
are unaffected and will continue to operate normally.
Connect the low voltage field wiring from each unit per the 
low voltage field wiring diagrams in Section on “Controller 
Wiring”.  

NOTE: Maximum of 18-gauge control wiring 

should be used.  Using heavier gauge wiring can create 

excessive stress on the control board as door is opened 

and closed.  Create a wiring loop so the door can open 

and close without stressing terminal blocks.

CONTROLLER GROUNDING 

A reliable earth ground must be connected in addition to 
any grounding from conduit.  Grounding lugs are supplied 
for this purpose.

CONTROLLER POWER-UP 

Whenever power is first applied to the controller, there 
is a twenty (20) second time-delay prior to any function 
(other than display) becoming active.  This time-delay 
is in effect if the controller On/Off button is used 
when 24VAC from air conditioners is present, and also 
if controller is in “ON” position and 24VAC from air 
conditioners is removed and then restored. 

FIRE SUPPRESSION CIRCUIT 

To disable the MC4002 and shut down both air 
conditioners, terminals F1 and F2 may be used.  The F1 
and F2 terminals must be jumpered together for normal 
operation.  A normally closed (nc) set of dry contacts may 
be connected across the terminals and the factory jumper 
removed for use with a field-installed fire suppression 
system.  The contacts must open if a fire is detected.  
See appropriate connection diagram - Figures 1, 2 or 3 
for this connection.  Contacts should be rated for pilot 
duty operation at 2 amp 24VAC minimum.  Shielded wire 
(22-gauge minimum) must be used, and the shield must 
be grounded to the controller enclosure.

IMPORTANT NOTE: Older Bard R-22 models employ an 

electronic blower control that has a 60-second blower 

off-delay.  Current production R-410A models do not 

use a blower off-delay device and the remainder of this 

(paragraph) does not apply.  In order to have immediate 

shutdown of the blower motor, in addition to disabling 

the run function of the air conditioners will require a 

simple wiring modification at the blower control located 

in the electrical control panel of the air conditioners 

being controlled by the lead/lag controller.  To eliminate 

the 60-second blower off-delay, disconnect and isolate 

the wire that is factory-connected to the “R” terminal 

on the electronic blower control, and then connect a 

jumper from the “G” terminal on the blower control to 

the “R” terminal on the blower control.  The electronic 

blower control will now function as an on-off relay with 

no off-delay, and the blower motor will stop running 

immediately when the F1-F2 fire suppression circuit is 

activated (opened).

STAGING DELAY PERIODS

The following delays are built in for both cooling and 
heating: 

  Stage 1

 – 0 seconds for blower (if not already on as 

continuous) 
10 seconds for cooling or heating output

  Stage 2

 –  10 seconds after Stage 1 for blower 

10 additional seconds for cooling or heating 
output 

  Stage 3

 – 10 seconds after Stage 2

 

Stage 4

 –  10 seconds after Stage 3

Note: 

For cooling Stages 1 and 2, the stage LED will    

blink for 10 seconds while the cooling output is delayed 
after that stage is called for.  There is also a delay after     
the stage is satisfied, and after the LED stops blinking,     
the  stage will turn off.  There is a minimum 10-second 
delay between stages 2 & 3, and 3 & 4, but no delayed 
output when stage is turned on or off, and LED for those 
stages will not blink.

BLOWER OPERATION

The controller can be configured to have main HVAC 
blowers  cycle on and off on demand; have all blowers 
run continuously; or have the lead unit blower run 
continuously with the lag unit blower cycling on 
demand.  Default setting is the blower(s) start and stop 
on demand.  There is also an option to have all blowers 
cycle on if one remote sensor is connected, and a 
temperature difference of more than 5F between any two 
sensors is observed.  This helps to redistribute the heat 
load within the structure and should reduce compressor 
operating time.

When any of the stages are satisfied, the stage  LED will 
blink for ten (10) seconds before the stage is actually 
turned off.

ADVANCE (SWAP) LEAD/LAG UNIT 

FEATURE

Pressing the Advance button for one (1) second will cause 
the lead and lag units to change positions.  This may be 
useful during service and maintenance procedures.

ACCELERATE TIMER FEATURE

Pressing the UP arrow button for five (5) seconds 
will activate an accelerate (speed-up) mode, causing 
the normal changeover time increments of days to 
be reduced to seconds.  Example: 7 days becomes 
7 seconds.  When “ACC” displays, release button.  
Whichever LED is on, indicating lead unit will blink over 
for each second until  the controller switches.  This is a 
check for the timer functionality.

Содержание AB3000-A

Страница 1: ...02 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 614I Supersedes 2100 6...

Страница 2: ...ication Board 36 Alarm LED Display Board 37 Figure 19 Alarm Board Connections for Normally Closed NC Open On Alarm Strategy 38 Figure 20 Alarm Board Connections for Normally Open NO Close On Alarm Str...

Страница 3: ...90B and Air Conditioning Systems For more information contact these publishers ACCA Air Conditioning Contractors of America 1712 New Hampshire Avenue NW Washington DC 20009 Telephone 202 483 9370 Fax...

Страница 4: ...for special applications or user preference The MC4002 can be equipped with one of two alarm boards and these can be factory installed or installed at any time in the field if so desired Should the b...

Страница 5: ...the base sides and top of the controller TEMPERATURE SENSORS The standard local temperature sensor has 12 leads and comes installed from the factory A secondary sensor is located internally on the mai...

Страница 6: ...optional controller Field installed a These connections require either jumper or Normally Closed NC relay contact at the Fire Smoke and Generator interface for Controller to function Inputs Lockout 1...

Страница 7: ...located in the electrical control panel of the air conditioners being controlled by the lead lag controller To eliminate the 60 second blower off delay disconnect and isolate the wire that is factory...

Страница 8: ...SETTINGS Order Display Description Range Choice Default LSEn Temperature at local main sensor SP Cooling setpoint temperature 65 to 90F 18 to 32C 77F 25C db Deadband between cooling SP and heating set...

Страница 9: ...d cooling setpoint is 4F default setting user selectable 2 6F warmer than Stage 1 On a call for 2nd Stage cooling the blower of the lag unit is turned on if not already on See Blower Operation and the...

Страница 10: ...omizer 3rd cooling setpoint is 2F default setting user selectable 2 3F warmer than Stage 2 On a call for 3rd Stage cooling the lead unit economizer will continue to operate as long as outdoor conditio...

Страница 11: ...ompressor Stage 1 partial capacity operation 2nd cooling setpoint is 4F default setting user selectable 2 6F warmer than Stage 1 at which time the lead unit compressor will switch to compressor Stage...

Страница 12: ...y conditions are below the setpoint of the economizer control the lead unit economizer will operate instead of the compressor If outdoor conditions are not acceptable for free cooling the compressor w...

Страница 13: ...e in the economizer control module HEATING SEQUENCE OF OPERATION Note All heating sequences for air conditioners with electric heat or heat pumps will automatically operate in Alternating Lead Lag Lea...

Страница 14: ...rotocol 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...

Страница 15: ...f 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 sys...

Страница 16: ...back to the CB5000 default IP setting simply hold the reset button next to the Ethernet jack for 5 seconds then release Connect to Network 1 After initial set up using laptop computer disconnect compu...

Страница 17: ...changes Notification Setup Page The notification setup page is used to determine which alarms are remotely communicated to the offsite monitoring systems The CB5000 supports email notifications as wel...

Страница 18: ...3 buttons while the controller is in the normal operating run mode 2 Press and hold the Advance Change Save button and the Up and Down arrow buttons simultaneously for 20 seconds until the display sho...

Страница 19: ...Economizer with CB5000 Communication Board A C with 1 Stage Compressor WA WL W A W L 1 4 7 9 11 ECONWMT 14 ECONWMT A C with 1 Stage Compressor W AA W LA 2 5 N A N A 12 WECOP 15 WECOP A C with 2 Stage...

Страница 20: ...24V TERMINALS MUCT BE CONNECTED AS SHOWN A C 1 CONNECTIONS FOR 48 VDC UNIT 1 UNIT 2 LOCAL REM 1 W NUMBER 8612 023A GEN OPTIONAL ALARM BOARD IS POLARITY SENSITIVE AND 1 LEAD MUST CONNECT TO SENSOR 12 L...

Страница 21: ...Manual 2100 614I Page 21 of 43 FIGURE 3 Controller Connections 2 Stage WA S WL S Series Air Conditioners No Economizers...

Страница 22: ...Manual 2100 614I Page 22 of 43 FIGURE 4 Controller Connections 1 Stage WA WL W A W L Series Air Conditioners No Economizers with Alarm Board CB5000 Communication Board...

Страница 23: ...SILVER LEAD TO AG FIRE SMOKE ALARM CIRCUIT 24V TERMINALS MUCT BE CONNECTED AS SHOWN A C 1 CONNECTIONS FOR 48 VDC K UNIT 2 LOCAL REM 1 COPPER A C 2 GEN OPTIONAL ALARM BOARD IS POLARITY SENSITIVE AND 1...

Страница 24: ...Manual 2100 614I Page 24 of 43 FIGURE 6 Controller Connections 2 Stage WA S WL S Series Air Conditioners No Economizers with Alarm Board CB5000 Communication Board...

Страница 25: ...Manual 2100 614I Page 25 of 43 FIGURE 7 Controller Connections 1 Stage WA WL W A W L Series Air Conditioners with Older Style EIFM Economizers...

Страница 26: ...Manual 2100 614I Page 26 of 43 FIGURE 8 Controller Connections 2 Stage WA S WL S Series Air Conditioners with Older Style EIFM Economizers...

Страница 27: ...Manual 2100 614I Page 27 of 43 FIGURE 9 Controller Connections 1 Stage WA WL W A W L Series Air Conditioners with Older Style EIFM Economizers and with Alarm Board CB5000 Communication Board...

Страница 28: ...Manual 2100 614I Page 28 of 43 FIGURE 10 Controller Connections 2 Stage WA S WL S Series Air Conditioners with Older Style EIFM Economizers and with Alarm Board CB5000 Communication Board...

Страница 29: ...Manual 2100 614I Page 29 of 43 FIGURE 11 Controller Connections 1 Stage WA WL W A W L Series Air Conditioners with ECONWMT Economizers...

Страница 30: ...OCAL REM 1 REM 2 FIRE SMOKE OPTIONAL 48 VDC GEN FIRE SMOKE ALARM CIRCUIT IS POLARITY SENSITIVE AND MUCT BE CONNECTED AS SHOWN LEAD MUST CONNECT TO SENSOR 12 LEADS COPPER SILVER COPPER SILVER COPPER NC...

Страница 31: ...Manual 2100 614I Page 31 of 43 FIGURE 13 Controller Connections 2 Stage WA S WL S Series Air Conditioners with ECONWMT Economizers...

Страница 32: ...Manual 2100 614I Page 32 of 43 FIGURE 14 Controller Connections 1 Stage WA WL W A W L Series Air Conditioners with ECONWMT Economizers and with Alarm Board CB5000 Communication Board...

Страница 33: ...TS OPEN ON ALARM CU AND SILVER LEAD TO AG HUMIDITY CONTROLLER NOTE ALL SENSORS ARE NUMBER 8612 023A POLARITY SENSITIVE COPPER SENSORS BARD PART NOTE DC BACK UP POWER REMOVE JUMPER STANDARD LOCAL GENER...

Страница 34: ...Manual 2100 614I Page 34 of 43 FIGURE 16 Controller Connections 2 Stage WA S WL S Series Air Conditioners with ECONWMT Economizers and with Alarm Board CB5000 Communication Board...

Страница 35: ...Manual 2100 614I Page 35 of 43 FIGURE 17 Controller Connections Heat Pumps No Economizers...

Страница 36: ...Manual 2100 614I Page 36 of 43 FIGURE 18 Controller Connections Heat Pumps No Economizers and with Alarm Board CB5000 Communication Board...

Страница 37: ...to issue an alarm signal that the lead air conditioner is down or not delivering full capacity and that the lag air conditioner is now operating REFRIGERANT PRESSURE ALARMS Air conditioners with J con...

Страница 38: ...loose to protect it from possible damage during installation of the wiring to main controller board and or the alarm board It is polarity sensitive and is keyed so it can only be installed in correct...

Страница 39: ...loose to protect it from possible damage during installation of the wiring to main controller board and or the alarm board It is polarity sensitive and is keyed so it can only be installed in correct...

Страница 40: ...wn If no buttons are pushed within thirty 30 seconds the controller will automatically revert back to RUN mode To reset all controller settings to the factory default values press the PROGRAM button f...

Страница 41: ...efault 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 Defa...

Страница 42: ...Manual 2100 614I Page 42 of 43 FIGURE 21 PARTS LIST DESCRIPTION DIAGRAM MIS 2954 B 15 3 4 5 12 7 9 2 6 13 14 11 16 18 8 10 1 17...

Страница 43: ...or X X X X X 7 8611 099 LTF Fitting X X X X X 8 5400 002 Hinge X X X X X 9 8612 023A Sensor X X X X X 10 7961 731 Label Keypad X X X X X 11 8611 006 Ground Lug 2 2 2 2 2 12 8612 047 Communication Boar...

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