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INSTALLATION INSTRUCTIONS
& REpLACEMENT pARTS LIST
MD4000 SERIES SOLID STATE
DUAL UNIT LEAD/LAG CONTROLLER
for use with H-Series
Wall Mount Air Conditioners
with F & G Spyder™ Economizers only
Bard Manufacturing Company, Inc. Manual No.: 2100-574
Bryan, Ohio 43506 Supersedes: NEW
File: Vol. III Tab 19
Since 1914...Moving ahead, just as planned.
Date: 07-05-12
Manual 2100-574
Page 1 of 23
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CONTENTS Getting Other Information and publications 3 Economizer Failure Alarm .....................................16 MD4000 General Information Dirty Filter Alarm ....................................................16 Shipping Damage....................................................4 2-Compressor Run Alarm ......................................16 General ...................................................................4 Alarm Wiring .......................................................
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Getting Other Information and Publications These publications can help you install the air FOr m Ore InFOrmat IOn, c Ontact conditioner or heat pump. You can usually find these these Publ Ishers: at your local library or purchase them directly from the publisher. Be sure to consult current edition of each ACCA Air Conditioning Contractors of America standard. 1712 New Hampshire Avenue, NW Washington, DC 20009 Telephone: (202) 483-9370 Standard for the Installation ............... A
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The MD4000 is equipped with the B alarm board. Form C dry contact alarm relays are used, offering both NO and NC switching to meet the user’s specific ** ImPOrtant ** alarm protocol, providing complete flexibility to meet The equipment covered in this manual is to be installed by any user's requirements. All alarm actuations are trained, experienced service and installation technicians. individually indicated on the controller front panel. Please read entire manual before proceeding. Ther
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If the differential is greater than 12F then the controller sPec IFIcat IOns /Features FOr will check to determine the on-board sensor is reading a mD4000-b c Ontr Oller temperature that is between the SP (set-point) plus 12F MD4000 Basic Controller and the SP minus the DB (dead-band) minus 12F. If it is •Input power: 18-32 VAC, 60/50Hz, power is supplied from the on-board sensor will become the valid sensor reading A/C #1 and/or A/C #2 and the controller will ignore the local sensor rea
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bas Ic mD4000 c Ontr Ol ler l Ocate D In the mD4000 Panel b Ox InPut/ Out Put s Pec IFIca t IOns Unit #1 t erminal Block mD4000 c Ontr Oller c Onnect IOns R – 24VAC hot from Unit Located on Main Controller Board C – 24VAC common from Unit Y – Compressor Signal to Unit Unit #1 C – 24VAC common F – Economizer Shutdown Output to Economizer R – 24VAC hot A – Compressor Signal from Economizer G – fan (Form A, NO) 4 – Dirty Filter Alarm from Unit W – heat (Form A, NO) 5 – Dirty Filter Ala
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sPec IFIcat IOns /Features FOr l OW v Olta Ge FIel D WIr InG mD4000-b & -bc cO ntr Oller alarms The MD4000 is powered from the air conditioners that Inputs it is controlling, 24 VAC (18-32V) low voltage only. Lockout 1 2, 3 – input from HVAC #1 Circuitry in the MD4000 isolates the power supplies of Lockout 2 2, 3 – input from HVAC #2 the two air conditioners so that no back feeds or phasing problems can occur. Additionally, if one air conditioner Outputs loses power, the MD4000 and the othe
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FIre su PPress IOn c Ircu It bl OWer OPerat IOn To disable the MD4000 and shut down both air The controller can be configured to have main HVAC blowers cycle on and off on demand; have all blowers conditioners, terminals F1 and F2 may be used. The F1 and F2 terminals must be jumpered together for normal run continuously; or have the lead unit blower run continuously with the lag unit blower cycling on operation. A normally closed (nc) set of dry contacts may be connected across the term
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General Pr OGramm InG Overv IeW mD4000 cO ntr Oller butt Ons an D Funct IOn 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
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1. Air Conditioners with Electric Heat heat InG se Quence OF OPerat IOn st 1 stage heating set point is the dead-band (db) below Note: All heating sequences for air conditioners with st the 1 stage cooling set point (the SP entered into the electric heat or heat pumps will automatically operate program). The dead-band is adjustable from 2-40F, and in Alternating Lead/Lag/Lead/Lag sequence even if factory default is 27F. controller is set to Non-Alternating for cooling with or nd without
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For Vista or Windows 7: sPec IFIcat IOns FOr OPt IOnal rem Ote c OmmunIca t IOn bOar D 1. Open Control Panel, click Network & Internet. 2. Click Network & Sharing Center. CB4000 COMMUNICAt ION BOARD 3. Click Local Area Network link. Note: If this communication board was not originally 4. Click Properties. factory installed it can be field-installed at anytime. Bard 5. Highlight Internet Protocol Version 4 (TCP/ part number is CB4000. It allows remote access via IPV4) and select Pr
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USER PAGE 4. General Alarm Status: a. Fire/Smoke, Clear or Alarm 1. The designated Admin person can assign up to 9 b. Low Temp, Clear or Alarm additional users and set-up as Admin, Write or c. High Temp #1, Clear or Alarm Read authority. d. High Temp #2, Clear or Alarm 2. User Name and password must be assigned, each e. Controller Failure, Clear or Alarm must be at least 3 characters long, and are case sensitive. SEt POINt S PAGE (Note: “Read” level authority 3. O
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A normally closed (NC) dry contact as part of generator c Ontr Oller WIr InG controls is required. These contacts must open when The MD4000 can be used for controlling two (2) air the generator is started, and such action will signal the conditioners with economizers. MD4000 controller to this condition and disable lag air conditioner run function and close economizers if secur It Y (lO ck InG) Fea ture active. The MD4000 controller can be locked such that A wire jumper is factory-instal
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table 1 hOOk -uP DIa Gram select IOn table — re Ference FIGure 1 sh OWn mD4000-b system model mD4000-bc newer ec OnWmt economizer newer ec OnWmt economizer — t ype series with cb 4000 c ommunication board no c ommunication board A/C with 1-Stage Compressor H**A / H**L 1 2 FIGure 1 mD4000-b c Ontr Oller c Onnect IOns 1-st a Ge (h**a/ h**l ser Ies) a Ir c OnDIt IOners WIth (ec OnWmt) ec OnOmIzers AC UNIT 1 3 4 48 MD4000 UNIT 1 MD4000 TERMINAL BLOCK 47 46 46 45 45 44 44 DISPLAY 1 DISPLAY 2 43 43
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FIGure 2 mD4000-bc c Ontr Oller c Onnect IOns 1-st a Ge (h**a/ h**l ser Ies) a Ir c OnDIt IOners WIth (ec OnWmt) ec OnOmIzers an D WIth alarm bOar D & cb4000 c OmmunIca t IOn bOar D AC UNIT 1 3 4 48 MD4000 UNIT 1 MD4000 TERMINAL BLOCK 47 46 46 45 45 44 DISPLAY 1 DISPLAY 2 44 43 43 42 42 1 2 3 4 1 2 34 41 41 R RED/WHITE R R C BLACK/WHITE C C 27 BLUE Y Y NO YELLOW F F 9 YELLOW/WHITE A A 26 4 4 PURPLE DIRTY FILTER ALARM (NC) 28 BLUE/WHITE 5 5 30 YELLOW/RED 6 6 MD4000 MAIN BOARD 10 BROWN/WHITE 7 15
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ec OnOmIzer Fa Ilure alarm alarm WIr InG Upon failure of either economizer to open on command Alarm relays can be wired for NO (close on alarm) or or close on command, the Economizer Failure Alarm NC (open on alarm) strategy. will open normally closed contacts to signal the Alarm relays can be used individually if there are failure. To utilize this feature, terminals 8 & 9 must be enough available building alarm points, or can be connected to the shelter alarm panel. arranged into smaller
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2nD sta Ge c OOl InG alarm emer GencY ven t Ilat IOn se Quence This alarm output is available for use if desired. It is For units with economizers, there are two (2) important to note that in some installations, due to A/C emergency ventilation sequences designed into the system sizing and internal heat load, that the secondary controller. Both require the -B alarm board and (lag) air conditioning unit may be called upon to assist connection of terminals E and F from the air conditioner th
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FIGure 3 alarm b Oar D c Onnect IOns FOr n Ormall Y cl Ose D "nc " OPen- On-alarm stra te GY IMPORt ANt! LED display board is shipped 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 position. Manual 2100-574 Page 18 of 23
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FIGure 4 alarm b Oar D c Onnect IOns FOr n Ormall Y OPen " nO" cl Ose- On-alarm stra te GY IMPORt ANt ! LED display board is shipped 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 position. Manual 2100-574 Page 19 of 23
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To change the setting of any step, press the CHANGE Pr OGramm InG Instruct IOns button and the display will stop flashing, allowing To swap lead and lag unit positions, press the change to the setting by using the DOWN or UP ADVANCE button. arrows. When desired setting is reached, press the SAVE button, and proceed as desired. When done with To enter the Program mode, press the PROGRAM programming changes, press the PROGRAM button button and release it when the message PROG until disp
