Manual 2100-614I
Page
4 of 43
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
These instructions explain the operation, installation
and troubleshooting of the MC4002 controller.
All internal wiring is complete. Only attach low voltage
field wiring to designated terminal strips.
The MC4002 is for use with units with or without
economizers, can be configured for use with heat
pumps, and has a dehumidification control feature
if an optional humidity controller is connected.
Dehumidification control cannot be used with heat
pump.
Each unit should be sized to handle the total load of
the structure if 100% redundancy is required.
It is recommended that a 5-minute compressor time
delay relay be installed in each unit if not so equipped.
The MC4002 controller is suitable for both 50 and 60
HZ operation, and is fully configurable such that it can
be used in virtually any installation. See Controller
Programmable Features and Default Settings.
THEORY OF OPERATION
The 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 MC4002 controller can be configured for
alternative (lead/lag/lead/lag) sequence, which is
default setting. It can be changed to non-alternating
(lead/lead/lag/lag) sequence as required 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 base controller alone be initially installed,
it is easily upgradeable by simple snap-in, plug-in field
installation of either one of the alarm boards, requiring
only the connection of the building alarm circuitry to
the alarm boards. Form C dry contact alarm relays
are used, offering both NO and NC switching to meet
the user’s specific alarm protocol, providing complete
flexibility to meet any user's requirements. All alarm
actuations are individually indicated on the controller
front panel.
There is an Ethernet-based remote communication
option that can be either factory or field installed. See
section on Communication Module.
CONTROLLER CERTIFICATIONS
The MC4002 main controller board, optional alarm
boards, optional communication module, 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:
MC4002 Series
Master Controller
This device complies with FCC Rule Part 15, Subpart
B, Class A. Operation is subject to the following two
conditions:
1. This device may not cause harmful interference
2. This device must accept any interference
received, including that which may cause
undesired operation.
This device complies with CE Standards EN55011/
EN50081 and EN55024 for ISM Equipment, Class A.
This ISM device also complies with Canadian ICES –
001.
Bard Manufacturing Company, Inc.
Bryan, OH 43506
** IMPORTANT **
The equipment covered in this manual is to be installed
by trained, experienced service and installation
technicians. Please read entire manual before
proceeding.
CONFORMS TO UL STD 916
CERTIFIED TO
CSA STD C22.2 NO. 205
