Bard Manufacturing Company Bryan, Ohio 43506

INSTALLATION INSTRUCTIONS

CMH-3

LOW PRESSURE CONTROL

DESCRIPTION

The CMH-3 is a field installable low pressure control. The CMH-3 consists of:

1.Installation Instructions 7960-233A

2.Control Assembly 910-1095

3.Low Pressure Control 1804-0107

4.Unit Label 7961-312-0012

For use with all WH182 – WH602 Hi-Boy Wall Mount Heat Pumps.

INSTALLATION INSTRUCTIONS

Disconnect all power to unit. Remove control panel inner and outer covers, and right side condenser inlet grille. Circled numbers on Figure 2 correspond to installation instruction steps. Dashed lines indicate that a wire has been disconnected from this terminal and reconnected to another terminal.

Use Figure 2 for WH182 to WH361.

Use Figure 3 for WH421 to WH602.

Step 1. Mount control assembly 910-1095 into control panel as shown with screws provided. See Figure 2 or 3, Step 1.

Step 2. Disconnect blue high pressure control wire from heat pump control terminal LO and reconnect to terminal #1 of control assembly 910-1095. Route wires through wire holder as shown in Figure 2 or 3, Step 2.

Step 3. Connect the blue wire from control assembly 910-1095 to LO terminal of the heat pump control. See Figure 2 or 3, Step 3.

Step 4. Route low pressure control wires up through the bushing in the bottom of the control panel. Replace sealing compound after routing wires through the bushing. Route the wires through the wire holders in the control panel as shown in Figure 4. Connect the low pressure control wires between the terminals #1 and #3 of control assembly 910-10-9. See Figure 2 or 3, Step 4.

Step 5. Connect the yellow wire from control assembly 910-1095 to Y terminal of the compressor contactor coil. This is the side of the contactor coil that the yellow wire is attached to. See Figure 2 or 3, Step 5.

Step 6. Connect the black wire from control assembly 910-1095 to C terminal of the compressor contactor coil. This is the side of the contactor coil that the black wire is attached to. See Figure 2 or 3, Step 6.

Step 7. Remove service port cap on the suction line. 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 cap on the flare tee service port and tighten. See Figure 4.

Step 8. Recheck all wiring. See Figure 1. Check for proper operation of the unit by energizing in cooling mode. Run for five minutes. Unit should not go into lockout.

Step 9. Apply “This unit equipped with CMH-3 control module” label to the inside of the inner control panel cover above the wiring diagram.

Step 10. Replace all panels and covers. This completes installation.

7960-233A Page 1

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Bard installation instructions Installation Instructions CMH-3 LOW Pressure Control
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CMH-3 specifications

The Bard CMH-3 is a state-of-the-art device designed for environmental heating and cooling solutions, particularly in residential and commercial applications. It has gained recognition for its innovative features, efficient performance, and reliability, making it a preferred choice for many users seeking to enhance indoor comfort.

One of the key features of the Bard CMH-3 is its advanced climate control capabilities. The device employs a multi-speed fan system that ensures optimal air circulation, allowing for precise temperature control in various environments. This versatility is especially beneficial in spaces with fluctuating heating and cooling demands, as the CMH-3 can adjust its performance to meet specific requirements seamlessly.

In addition to its impressive airflow management, the Bard CMH-3 integrates cutting-edge technology that contributes to its energy efficiency. The unit is equipped with a high-efficiency heat exchanger and energy-saving modes that significantly reduce energy consumption while maintaining excellent heating and cooling performance. This not only leads to lower utility bills for consumers but also promotes environmental sustainability through reduced energy usage.

Another standout characteristic of the Bard CMH-3 is its durability. Constructed with high-quality materials, the unit is designed to withstand harsh weather conditions and provide long-lasting service. Its corrosion-resistant casing ensures that the system remains effective even in humid or moist environments, making it suitable for various geographical locations.

The Bard CMH-3 also offers user-friendly features, including a digital thermostat and remote control options. This allows users to adjust settings conveniently from anywhere in their space, enhancing the overall user experience. The intuitive interface simplifies operation and helps individuals set their desired climate preferences without difficulty.

Furthermore, maintenance is made easy with the Bard CMH-3, as it includes accessible components for routine checks and service. Regular maintenance is crucial for optimal performance and longevity, and the design of this unit reflects Bard's commitment to user-friendly serviceability.

In summary, the Bard CMH-3 presents a compelling solution for those in need of reliable heating and cooling. With its advanced climate control features, energy-efficient technology, durable construction, and ease of use, it stands out as an exemplary choice for both residential and commercial applications. Bards' continuous innovation in HVAC technology ensures that units like the CMH-3 not only meet but exceed consumer expectations in comfort, efficiency, and longevity.
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