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Bard HAC241-AD040, HAC421-AD040 Installation Instructions CMA-10A, Installation Instructions for

Models: HAC601-BD040 HAC481-BD040 HAC181-AD040 HAC361-AD040 HAC481-AD040 HAC601-AD040 HAC301-AD040 HAC241-AD040 HAC421-AD040

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INSTALLATION INSTRUCTIONS – CMA-10A

Disconnect all power to unit. Remove control panel cover.

1.Screw compressor control module and terminal block into control panel as shown in Figure 5.

2.Disconnect yellow low voltage wire form compressor contactor and reconnect to terminal “Y” of the compressor control module.

3.Connect the yellow wire from the compressor control module to “Y” side of the compressors contactor coil. This is the same terminal from which the wire was removed in Step 2.

4.Connect the black wire form the compressor control module to common “C” side of the compressor contactor coil.

5.Connect a field supplied wire from “R” of the indoor unit to “R” on the compressor control module.

6.Route the high (red) and low (blue) pressure switch wires through the bushing in the bottom of the control panel. Connect the low pressure switch wire to terminals LPC of the compressor control module.

7.Remove service port caps on both the suction and discharge lines. Install the high pressure switch on the discharge line to the flare tee adapter that is brazed to the controls. Install the low pressure switch on the suction line. Check for pressure at the flare tee dill valves after installation to insure that the dill valve in the unit service port was depressed by the flare tee connector. Check for leaks at the flare tee connectors. Replace service port caps on the flare tee service ports and tighten.

8.Adjust the compressor time delay relay to the desired delay on break. Two minutes are recommended. This TDR is variable form 30 seconds to 5 minutes.

9.Recheck wiring. Energize unit is first stage cooling. Compressor should not start until the time delay has expired. This will be 10% of the delay on break period. Run the unit for at least 5 minutes. The unit should not go into lockout.

10.Apply “This unit equipped with CMA-10A control module.” label to the inside of the inner control panel cover above the wiring diagram.

11.Replace all panels and covers. This completes installation.

FIGURE 8

INSTALLATION INSTRUCTIONS FOR

CMA-10A DUAL PRESSURE CONTROL and

COMPRESSOR TIME DELAY RELAY

MIS-1303

Manual 2100-346 Page 13

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Bard HAC241-AD040 Installation Instructions CMA-10A, Installation Instructions for, Compressor Time Delay Relay
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HAC601-BD040, HAC481-BD040, HAC181-AD040, HAC361-AD040, HAC481-AD040 specifications

The Bard HAC series, specifically the HAC421-AD040, HAC241-AD040, HAC301-AD040, HAC601-AD040, and HAC481-AD040 models, represents a versatile and robust selection of commercial heating and cooling systems designed for a variety of applications. These units are known for their efficiency, reliability, and innovative features, making them ideal for business, industrial, and institutional use.

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Bard HVAC also places an emphasis on ease of maintenance. With easily accessible components and straightforward design, routine upkeep can be performed quickly, minimizing downtime and reducing operational costs.

In conclusion, the Bard HAC421-AD040, HAC241-AD040, HAC301-AD040, HAC601-AD040, and HAC481-AD040 models are exemplary choices for those seeking a dependable, efficient, and adaptable heating and cooling solution. With their energy efficiency, user-friendly technology, durability, space-saving designs, and ease of maintenance, these units stand out as leading options for commercial HVAC needs.