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The purpose of the CMA-40 kit is to allow the
addition of sensors for connection to a DDC control
system. These sensors include a dirty filter switch, a
discharge air sensor, an airflow verification switch and a
compressor current sensor.
The CMA-40 kit is for use with Bard models W18-36AB
wall-mount air conditioners.
NOTE:
This kit is not
intended for units with mechanical dehumidification.
Component mounting locations as depicted in these
instructions will encounter obstructions if attempting to
install on units with dehumidification.
The CMA-40 consists of field-installable sensors for use
with DDC control systems. The CMA-40 includes:
• 7960-849 Supplemental Instructions
• 910-1894 Airflow Switch Assembly
• CMC-31 Dirty Filter Switch Kit
• 910-1223 Compressor Current Sensor
• 910-1224 Discharge (Supply) Air Sensor
• 8607-021 Low Voltage Terminal Board
• 7961-837 Terminal Board Label
• 8611-033 7/8" Snap Bushing (2)
• 1012-065 Phillips Head Screw (6)
• 1012-086 Hex Head Screw (8)
• 7961-312-0483 CMA-40 Unit I.D. Label
Field-supplied tools needed:
• 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
NOTE:
Low ambient kit required for Balanced Climate
and compressor operation below 60º F (sold separately).
Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
www.bardhvac.com
Manual: 7960-849
Supersedes:
NEW
Date: 9-17-19
CMA-40 DDC Sensors
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
