Colmac Air-Source Heat Pumps
CxV Series Low Temp Air Source
Air-Source Heat Pumps
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The CxV series features a 5 hp or 15 hp compressor, propeller fan, and PLC controls. Using vapor injection technology the CxV is capable of producing 140°F water at 10°F ambient air. The 5 hp unit can continue to operate down to -1°F, producing 120°F water and the 15 hp can continue to operate down to 0°F, producing 130°F water.
The CxV utilizes the same Intelligent Defrost control and hot gas defrost that was developed on the new CxA series. This improves hot water output and minimizes defrost cycles, maximizing COPs.
As with all Cx series units, individual CxV unit controllers can interconnect (up to 12 units) to perform staging, runtime balancing, and BMS communications
Units are designed with serviceability in mind. Larger CxV-15’s have removable panels and the CxV-5’s swing out door allows for excellent access to all internal components. They also features external High and Low Pressure measurement ports.
CxA Series Low Temp Air Source
Air-Source Heat Pumps
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The CxA series is the next generation of air source heat pumps from Colmac WaterHeat. This represents a leap forward in controls and operation from the previous HPA design.
Models include compressors from 10 to 30 hp, with optional VFDs to provide turndown and soft-start capabilites. ECM propeller fans come standard, with optional ECM plenum fans that can accomodate up to 2″ of external static pressure depending on the application. Modifications to the refrigeration circuit allow the CxAs to operate with air temperatures 10°F lower than HPA units.
Form Factor
CxA units are modular with a taller profile, reduced footprint design. CxA-10 & -15 models are designed to fit through a standard 36″ door and inside most elevators for easier installation, particularly in retrofit applications. CxA units require no service clearance on the sides, allowing them to be placed next to each other in arrays of up to eight units. The units’ slide-out drawers allow for in-place servicing of the refrigeration components. As with all Cx series units, individual unit controllers can interconnect via ethernet to perform their own staging, run time balancing and BMS communications.
Defrost
To improve COPs and improve hot water output, the CxA series has a completely redesigned defrost system. Hot gas defrost has been added to the evaporator, cutting defrost times to mere minutes. New Intelligent Defrost controls monitor operating conditions so units only go into defrost mode when necessary.