Manual 2100-484E
Page 2 of 22
CONTENTSGetting Other Information and Publications 3
DC3000 General Information
Shipping Damage .................................................. 4
General.................................................................. 4
Theory of Operation............................................... 4
Controller Certifications ......................................... 4
Specifications/Features for Basic Controller
DC3000 Basic Controller ....................................... 5
Mounting the Controller
Installation Instructions.......................................... 5
Temperature Sensors
Remote Indoor Sensor........................................... 5
Remote Outdoor Sensor........................................ 5
Temperature Sensor Logic
Using Multiple Sensors.......................................... 5
Controller Input/Output Specifications
Main Controller Board............................................ 6
Internal Alarm Board .............................................. 6
Low Voltage Field Wiring
Circuitry in the DC3000.......................................... 7
Controller Grounding
Earth ground.......................................................... 7
Controller Power-Up
Time Delay on Power-Up....................................... 7
Fire Suppression Circuit
Disabling the DC3000............................................ 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
Humidity Control Option
Adding Optional Humidity Control.......................... 8
Sequence of Operation - Cooling (Air Conditioners)
No Economizer ...................................................... 8
With Economizers.................................................. 8
Sequence of Operation - Heating (Air Conditioners)
With Electric Heat.................................................. 9
Figures
Figure 1 DC3002 Controller Connections for 2 Air
Conditioners with Economizer ................... 11
Figure 2 DC3002 Controller Connections for 2 Air
Conditioners with No Economizer.............. 12
Figure 3 DC3003 Controller Connections for 3 Air
Conditioners with 3 Economizers .............. 13
Figure 4 DC3003 Controller Connections for 3 Air
Conditioners with Economizers
(No Economizer A/C #3)......................... 14
Figure 5 DC3003 Controller Connections for 3 Air
Conditioners with No Economizers............ 15
Figure 6 Alarm Board Connections for Normally Closed
“NC” Open-On-Alarm Strategy................... 17
Figure 7 Alarm Board Connections for Normally
Open “NO” Close-On-Alarm Strategy..... 18
(Label) DC3000 Series....................................... 20
Figure 8 Parts List Description............................. 21
Tables
Table 1 Controller Connection Diagrams ............ 10
Table 2 Parts List ................................................ 22
Security (Locking) Feature
Locking and Unlocking the DC3000 ...................... 9
Generator Run Feature
Standby Generator Disable Operation................... 9
Backup DC Power Connection
Input Connections Available .................................. 9
DC Fan Control
Free Cooling & Emergency Ventilation................ 10
Shelter Purge Control .......................................... 10
Controller Wiring
Refer to Connection Diagram ...................... 10 & 11
Alarm Wiring
Wiring Alarm Relays ............................................ 16
2nd Stage Cooling Alarm
Alarm Output is Available..................................... 16
Refrigerant Pressure Alarms
Connecting the Alarm Circuit............................... 16
Emergency Ventilation Sequence
Using Economizers
Two Operating Sequences .................................. 16
Programming Instructions ................................... 19