Bard CMC-35 Owner's manual

Page 1 of 3
The CMC-35 is a field-installable alarm relay kit. This
alarm relay kit is only for use on R-410A refrigerant
systems.
The CMC-35 kit is for use with Bard models W42AC,
W42HC, W48AC, W48HC, W60AC, W60HC and
W72AC wall-mount units.
The
CMC-35 kit consists of:
• 7960-857 Supplemental Instructions
• 910-2069 Relay Assembly
• 1012-065 Screws (2)
• 7961-312-0514 CMC-35 Unit I.D. Label
Field-supplied tools needed:
• Appropriate personal protection equipment,
including gloves and safety glasses
• 5/16" nut driver
• Phillips head screwdriver
• Small flat head screwdriver for securing wire in
terminal blocks
• Electrical tools
• Multimeter for troubleshooting
Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
www.bardhvac.com
Manual: 7960-857
Supersedes: NEW
Date: 9-24-19
CMC-35 Alarm Relay Kit
SUPPLEMENTAL INSTRUCTIONS
Sharp metallic edges.
Take care and wear appropriate protective
devices to avoid accidental contact with
sharp edges.
Failure to do so can result in personal
injury.
!CAUTION
Exposed moving parts.
Disconnect all electrical power before
servicing.
Failure to do so can result in severe injury
or amputation.
!WARNING
Electrical shock hazard.
Disconnect the remote electric power
supply or supplies before servicing.
Failure to do so can result in serious injury
or death.
!WARNING

Manual 7960-857
Page 2 of 3
Installation
Disconnect all power to wall-mount unit. Remove outer
and inner control panel covers.
1. Mount the 910-2069 relay assembly in the control
panel as shown in Figure 1.
2. Route the wires in the cable duct. Connect the
4 pin male plug to the female plug on the side
of the low voltage terminal box. Connect the
pink wire to the ALR terminal on the compressor
control module. Refer to Figure 2 on page 3 or
the unit wiring diagram for proper wire connection
locations.
3. Make the desired dry contact connections on the
front of the low voltage terminal strip. (Normally
Closed = 1 & 3, or Normally Open = 2 & 3). See
Figure 2 or the unit wiring diagram.
4. Apply “This unit is equipped with CMC-35 control
module” label to the inside of the inner control
panel cover above the unit wiring diagram.
5. Replace the inner and outer control panel covers.
This completes the installation.
Sequence of Operation
When installed, the alarm relay will indicate one of the
following has occurred:
• High refrigerant pressure lockout
• Low refrigerant pressure lockout
• Unit power brownout lockout
During any of the listed events, an alarm can be
signaled to a thermostat or controlling device. The unit
will remain in a lockout mode until the call for cooling
is removed (Y1, Y2) or power is reset to the unit.
FIGURE 1
CONTROL ASSEMBLY
PART #910-2069
4 PIN PLUG (MALE)
PLUGS INTO THE SIDE
OF THE LOW VOLTAGE
TERMINAL BLOCK MIS-4096

Manual 7960-857
Page 3 of 3
FIGURE 2
COM
NC
NO
C 1 2 3
4Pin 1243
Plug
ALARM RELAY WIRING DIAGRAM
PINK
BLUE/WHITE
R
1
5
4
3
MODULE
RELAY
RED
BLACK/WHITE
HPC
2
Y
CC
ALR
C
MINUTES
COMPRESSOR CONTROL
LPC
BLACK
A/C LOW VOLTAGE
TERMINAL BLOCK*
MIS-4060A
* CONNECT THERMOSTAT OR CONTROLLING
DEVICE TO LOWVOLTAGE TERMINALBLOCK