Manual 2100-484E
Page 4 of 22
SHIPPING DAMAGE
Upon receipt of equipment, the carton should be checked
for external signs of shipping damage. If damage is
found, the receiving party must contact the last carrier
immediately, preferably in writing, requesting inspection
by the carrier’s agent.
GENERAL
NOTE: DC3000 is used throughout this Manual as a
general reference to the controller system. There are
two controller models, DC3002 for 2 HVAC units and
DC3003 for 3 HVAC units, and these model numbers
are referenced when specific features or characteristics
apply only to either the DC3002 or the DC3003.
Occasional reference is made to alarm board AB3002 or
AB3003. AB3002 is the internal alarm board for the
DC3002 controller, and AB3003 is the internal alarm
board for the DC3003 controller.
These instructions explain the operation, installation and
troubleshooting of the DC3000 controller.
All internal wiring is complete. Only attach low voltage
field wiring to designated terminal strips.
The DC3000 is for use with units with or without
economizers, and has a dehumidification control feature
if an optional humidity controller is connected.
Each unit should be sized to handle the total load of the
structure if 100% redundancy is required.
It is recommended that a five (5) minute compressor
time delay relay be installed in each unit.
The DC3000 controllers are suitable for both 50 and 60
HZ operation, and are fully configurable such that they
can be used in virtually any installation. See Controller
Programmable Features and Default Settings.
THEORY OF OPERATION
The DC3002 controller is used to control two wall
mount air conditioners from one control system. It
provides total redundancy for the structure and equal
wear on both units. It can be used with units with or
without economizers and it is recommended that both
units be equipped alike.
The DC3003 controller is designed to control 3 air
conditioners, and can be used for 2 if it is anticipated the
third unit may be installed later.
NOTE: If this is done, see Note 1 on Alarm Board
Connections (Figure 6 or 7) to prevent nuisance Power
Loss Alarm indication for absent HVAC #3
When DC3003 is used for controlling three HVAC
units, only units 1 or 2 operate in lead/lag sequence.
HVAC #3 is always last to operate and functions only in
the number 3 position. All three units are available to
operate on-demand as required.
Alarm capability is standard on both models.
CONTROLLER CERTIFICATIONS
The DC3000 main controller board, optional alarm
boards, and remote sensors have undergone extensive
testing for immunity and emissions. This system is
FCC-compliant, in accordance with CE requirements,
and meets the following standards:
EN50082-2 Standard for Immunity
EN55011 Standard for Emissions
** IMPORTANT **The equipment covered in this manual is to be installed by
trained, experienced service and installation technicians.
Please read entire manual before proceeding.