Bard CMH-20 Control
The Bard CMH-20 Low Ambient Control is a field-installable kit engineered for Bard wall-mount heat pumps to enable reliable cooling operations in low-temperature environments. This pressure-actuated fan cycle control maintains optimal head pressure by cycling the outdoor fan motor when ambient temperatures drop below 60°F. Designed specifically for compatibility with Bard WH series units, the CMH-20 head pressure control prevents evaporator coil freeze-ups and ensures consistent refrigerant flow during off-season cooling demands. The kit includes a high-pressure switch, wiring harness, and necessary hardware for seamless integration into the existing control box. By regulating the condenser fan motor, this control protects the compressor from liquid slugging and ensures the system operates within its design envelope. For contractors managing telecom shelters or mission-critical equipment rooms, this low ambient kit is essential for maintaining year-round climate stability and system longevity.
Key Benefits- Ensures reliable low ambient cooling down to 0°F by regulating head pressure.
- Direct OEM Bard replacement part ensures perfect fitment and electrical compatibility.
- Prevents evaporator icing and compressor damage during low-load conditions.
- Heavy-duty pressure switch construction for long-term durability in commercial environments.
- Simplified field installation with included wiring diagrams and mounting hardware.
How do I test the Bard CMH-20 fan cycle switch?
Technicians should monitor discharge pressure; the switch typically closes on pressure rise (approx. 300 PSI) and opens on pressure fall (approx. 200 PSI) to maintain the liquid seal.
Is the CMH-20 compatible with all Bard wall-mount units?
The CMH-20 is specifically designed for 1.5 through 5-ton Bard heat pump models. Always verify your specific model number against the Bard technical specifications before installation.
Does this kit require a crankcase heater?
While the CMH-20 manages fan cycling, installing a crankcase heater is highly recommended for low ambient applications to prevent refrigerant migration to the compressor oil during the off-cycle.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $390.56
-65%$390.56
$136.70Bard CMH-20 Control
The Bard CMH-20 Low Ambient Control is a field-installable kit engineered for Bard wall-mount heat pumps to enable reliable cooling operations in low-temperature environments. This pressure-actuated fan cycle control maintains optimal head pressure by cycling the outdoor fan motor when ambient temperatures drop below 60°F. Designed specifically for compatibility with Bard WH series units, the CMH-20 head pressure control prevents evaporator coil freeze-ups and ensures consistent refrigerant flow during off-season cooling demands. The kit includes a high-pressure switch, wiring harness, and necessary hardware for seamless integration into the existing control box. By regulating the condenser fan motor, this control protects the compressor from liquid slugging and ensures the system operates within its design envelope. For contractors managing telecom shelters or mission-critical equipment rooms, this low ambient kit is essential for maintaining year-round climate stability and system longevity.
Key Benefits- Ensures reliable low ambient cooling down to 0°F by regulating head pressure.
- Direct OEM Bard replacement part ensures perfect fitment and electrical compatibility.
- Prevents evaporator icing and compressor damage during low-load conditions.
- Heavy-duty pressure switch construction for long-term durability in commercial environments.
- Simplified field installation with included wiring diagrams and mounting hardware.
How do I test the Bard CMH-20 fan cycle switch?
Technicians should monitor discharge pressure; the switch typically closes on pressure rise (approx. 300 PSI) and opens on pressure fall (approx. 200 PSI) to maintain the liquid seal.
Is the CMH-20 compatible with all Bard wall-mount units?
The CMH-20 is specifically designed for 1.5 through 5-ton Bard heat pump models. Always verify your specific model number against the Bard technical specifications before installation.
Does this kit require a crankcase heater?
While the CMH-20 manages fan cycling, installing a crankcase heater is highly recommended for low ambient applications to prevent refrigerant migration to the compressor oil during the off-cycle.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Bard CMH-20 Low Ambient Control is a field-installable kit engineered for Bard wall-mount heat pumps to enable reliable cooling operations in low-temperature environments. This pressure-actuated fan cycle control maintains optimal head pressure by cycling the outdoor fan motor when ambient temperatures drop below 60°F. Designed specifically for compatibility with Bard WH series units, the CMH-20 head pressure control prevents evaporator coil freeze-ups and ensures consistent refrigerant flow during off-season cooling demands. The kit includes a high-pressure switch, wiring harness, and necessary hardware for seamless integration into the existing control box. By regulating the condenser fan motor, this control protects the compressor from liquid slugging and ensures the system operates within its design envelope. For contractors managing telecom shelters or mission-critical equipment rooms, this low ambient kit is essential for maintaining year-round climate stability and system longevity.
Key Benefits- Ensures reliable low ambient cooling down to 0°F by regulating head pressure.
- Direct OEM Bard replacement part ensures perfect fitment and electrical compatibility.
- Prevents evaporator icing and compressor damage during low-load conditions.
- Heavy-duty pressure switch construction for long-term durability in commercial environments.
- Simplified field installation with included wiring diagrams and mounting hardware.
How do I test the Bard CMH-20 fan cycle switch?
Technicians should monitor discharge pressure; the switch typically closes on pressure rise (approx. 300 PSI) and opens on pressure fall (approx. 200 PSI) to maintain the liquid seal.
Is the CMH-20 compatible with all Bard wall-mount units?
The CMH-20 is specifically designed for 1.5 through 5-ton Bard heat pump models. Always verify your specific model number against the Bard technical specifications before installation.
Does this kit require a crankcase heater?
While the CMH-20 manages fan cycling, installing a crankcase heater is highly recommended for low ambient applications to prevent refrigerant migration to the compressor oil during the off-cycle.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
