Bard Solid State Dual Unit Lead/Lag Controller MC4000 User Manual
Page 2
Manual
2100-563C
Page
2 of 40
CONTENTS
Figures
Figure 1
Controller Connections 1-Stage (WA/WL, W**A/
W**L Series) A/C w/No Economizers ..... 17
Figure 2
Controller Connections 2-Stage (WA*S/WL*S
Series) A/C - No Economizers ................ 18
Figure 3
Controller Connections 1-Stage (WA/WL, W**A/
W**L Series) A/C - No Econo with Alarm Board &
CB4000 Comm. Board ........................... 19
Figure 4
Controller Connections 2-Stage (WA*S/WL*S
Series) A/C - No Econo with Alarm Board &
CB4000 Comm. Board ........................... 20
Figure 5
Controller Connections 1-Stage (WA/WL, W**A/
W**L Series) A/C-Older EIFM Econo ..... 21
Figure 6
Controller Connections 2-Stage (WA*S/WL*S
Series) A/C-Older Style EIFM Econo ...... 22
Figure 7
Controller Connections 1-Stage (WA/WL, W**A/
W**L Series) A/C w/Older Style EIFM Econo &
w/Alarm Board/CB4000 Comm. Board ... 23
Figure 8
Controller Connections 2-Stage (WA*S/WL*S
Series) A/C w/Older Style EIFM Econo & w/Alarm
Board/CB4000 Comm. Board ................. 24
Figure 9
Controller Connections 1-Stage (WA/WL, W**A/
W**L Series) A/C w/ECONWMT Econo .. 25
Figure 10 Controller Connections 2-Stage (WA*S/WL*S
Series) A/C w/ECONWMT Econo .......... 26
Figure 11 Controller Connections 1-Stage (WA/WL, W**A/
W**L Series) A/C w/ECONWMT Econo & w/Alarm
Board/CB4000 Comm. Board ................. 27
Figure 12 Controller Connections 2-Stage (WA*S/WL*S
Series) A/C w/ECONWMT Econo & w/Alarm
Board/CB4000 Comm. Board ................. 28
Figure 13 Controller Connections Heat Pumps -
No Economizers ..................................... 29
Figure 14 Controller Connections Heat Pumps -
No Economizers w/Opt. Alarm Board &
CB4000 Communication Board .............. 30
— — —
Alarm LED Display Board ...................... 31
Figure 15 Alarm Board Connections for Normally Closed
"NC" Open-On-Alarm Strategy ............... 32
Figure 16 Alarm Board Connections for Normally Open
"NO" Close-On-Alarm Strategy .............. 33
— — —
MC4000 Label ........................................ 35
Figure 17 Parts List Description Diagram ............... 36
Tables
Table 1
Hook-Up Diagram Selection ................... 17
Table
Parts List ................................................ 37
Getting Other Information and Publications
3
MC4000 General Information
Shipping Damage .................................................. 4
General .................................................................. 4
Theory of Operation ............................................... 4
Controller Certifications ......................................... 4
Specifications/Features for Basic Controller
MC4000 Basic Controller ....................................... 5
Mounting the Controller
Installation Instructions .......................................... 5
Temperature Sensors
Two Optional Sensor Inputs ................................... 5
Temperature Sensor Logic
Using Multiple Sensors .......................................... 5
Controller Input/Output Specifications
MC4000 Controller Connections ............................ 6
Specifications/Features for Alarm Boards
MC4000-A with Optional Base Alarm ..................... 6
MC4000-B with Enhanced Version Alarm .............. 6
Low Voltage Field Wiring
Circuitry in the MC4000 ......................................... 7
Controller Grounding
Earth ground .......................................................... 7
Controller Power-Up
Time Delay on Power-Up ....................................... 7
Fire Suppression Circuit
Disabling the MC4000 ........................................... 7
Staging Delay Periods
Stages 1 - 4 ............................................................ 7
Blower Operation
Various Blower Options ......................................... 7
Advance (Swap) Lead/Lag Unit Feature
Manual Switching of Units ..................................... 7
Accelerate Timer Feature
Testing the Timer Function ..................................... 7
General Programming Overview
Buttons & Function ................................................ 8
Humidity Control Option
Adding Optional Humidity Control .......................... 9
Cooling Operating Sequences
for Alternating Lead/Lag/Lead/Lag Config ........ 9-11
Cooling Operating Sequences
for Non-Alt Lead/Lead/Lag/Lag Config ........... 11-13
Heating Sequence of Operation ........................... 13
Specifications Opt. Remote Comm. Board .... 14-15
CB4000 Communications Board ......................... 15
Controller Wiring
Refer to Connection Diagram .............................. 16
Security (Locking) Feature
Locking and Unlocking the MC4000 .................... 16
Generator Run Feature
Standby Generator Disable Operation ................. 16
Backup DC Power Connection
Input Connections Available ................................ 16
Alarm Wiring .......................................................... 31
2nd Stage Cooling Alarm ...................................... 31
Refrigerant Pressure Alarms ................................ 31
Emergency Ventilation Sequence ........................ 31
Programming Instructions ................................... 34