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The CMA-38 is a field-installable low ambient fan
speed control for 460V motors. The CMA-38 460V
head pressure control helps maintain the correct
condensing temperature/pressure, which results in a
constant head pressure. By adjusting the condenser
fan speed, the CMA-38 controls the airflow through
the condenser. A single desired temperature/pressure
setpoint adjustment will result in precise condensing
temperatures and stable head pressures.
The CMA-38 kit is for use with Bard models W24AB-C
wall-mount air conditioners.
The CMA-38 kit consists of:
• 7960-847 Installation Instructions
• 902-2069 Fan Speed Control Box
• 910-2058 Outdoor Temperature Switch Assembly
• 8408-048 Freeze Protect Thermostat
• 5810-006 Flare Tee
• 1012-066 3/4" Screw (1)
• 8607-017 Terminal Block
• 1012-085 1/2" Self-Tapping Screws (5)
• 7950-004 Nylon Wire Ties (6)
• 7961-312-0338 CMA-38 Unit I.D. Label
Field-supplied tools needed:
• Personal protection equipment, including gloves
and safety glasses
• 5/16" nut driver
• 1/2" wrench (service port), 11/16" wrench (LAC
control) and 3/4" wrench (LAC assembly)
• Side cut pliers (for cable tie removal)
• Flat head screwdriver
• Small flat head screwdriver for securing wire in
terminal blocks
Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
www.bardhvac.com
Manual: 7960-847B
Supersedes: 7960-847A
Date: 12-9-19
CMA-38 Low Ambient 460V Fan Speed Control
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
