About Ultra Efficient Heat Pump Chiller Technology
& Chiltrix Air To Water Heat Pumps (ATWHP)

Above: Image of CX34 & CX35 CX34 See details, specs, performance maps CX35 See details, specs, performance maps CX50 See details, specs, performance maps See AHRI ACCL Catalog For CX34, CX35, CX50

Chiltrix surprised the USA heat pump market with the 2016 introduction of the Chiltrix CX34 ATWHP (Air To Water Heat Pump) with Chiltrix claiming nearly double the efficiency rating of the average system in its class, and higher than the top rated unit by nearly 40%. And official AHRI testing and Certification then confirmed that the CX34 actually exceeded it's "impossible" claims. Chiltrix continues to lead the air to water heat pump class with the CX34 and CX35, together holding claim to both First Place and Second Place in the race for highest efficiency ratings among officially certified heat pumps. The larger model, CX50 also has record-setting efficiency in its class. Together these units own the top-3 "best ever" ratings. Click here to Compare CX34 to CX35 CX34 Specs & Performance Data 2 Tons Cooling, 2.8 Tons Heating Seasonal EER IPLV.IP 23.8 / COP 3.93 CX35 Specs & Performance Data 2 Tons Cooling, 3.4 Tons Heating Seasonal EER IPLV.IP 22.4 / COP 4.67 CX50 Specs & Performance Data 3.5 Tons Cooling, 4.75 Tons Heating Seasonal EER IPLV.IP 21.2 / COP 4.62 Unlimited Flexibility - hundreds of designs are possible. Up to 14 ductless indoor units (IDUs) can be used per outdoor unit. The ODUs (outdoor units) can also be used with ducted air handlers, mini-duct systems, radiant heating and/or cooling, and can be integrated with existing boilers or solar heating. And, Chiltrix air to water heat pumps are also a highly efficient source of domestic hot water.

Chiltrix air to water heat pump chiller performance numbers seem too good to be true? We get that. It does seem almost impossible. That's the reason we had the CX34, CX35, and CX50 Officially Certified.
In addition to AHRI, we also have had our CX35 and CX50 R32 units tested and certified by TUV for heating where they each obtained the highest possible EN 14825 heating rating of A+++

CX50 Air To Water Heat Pump Spec Sheet

CX34 Air To Water Heat Pump Spec Sheet

CX35 Air To Water Heat Pump Spec Sheet

ALL ABOUT R32 Compare R32 to R410a, R-458B

Easily combined, you can mix/match any of these models in double or triple systems to create the perfect match to your requirements. Here are five example concept designs:

 

CX34 Specs & Performance Data
2 Tons Cooling, 2.75 Tons Heating
Seasonal EER 22.2 / COP 3.93

CX35 Specs & Performance Data
2 Tons Cooling, 3.4 Tons Heating
Seasonal EER IPLV.IP 22.4 / COP 4.67

CX50 Specs & Performance Data
3.5 Tons Cooling, 4.75 Tons Heating
Seasonal EER 21.2 / COP 4.62

Understand IPLV & Compare to other Small Air Cooled Chiller Heat Pumps - Whitepaper

IPLV Chiller Comparison Chart (shows cooling efficiency of CX34 comparison to leading brands)

Anti-Corrosion technology is used on all outdoor units to protect against salty air in coastal environments, and ensure a longer life in any environment. See complete anti-corrosion details.

Ultra Efficient Heat Pump / Chiller Technology

The CX-series air to water heat pumps work by cooling or heating a water or water/glycol fluid distribution loop using a high efficiency Mitsubishi DC-Inverter compressor, and pumping the fluid through a system that may include ductless fan coils, hydronic air handlers, and/or radiant systems. Any or all of these types of indoor equipment can be used, and can be used in combination with each other if desired, including domestic hot water. The fluid is returned to the heat pump/chiller ODU to heat or cool it back to its required operating temperature. The fluid contains water with 0-60% glycol, depending on the location and expected winter conditions. The CX units use top-quality German-made variable speed pumps for water/fluid flow control, and of course variable speed condenser fans. This is not an "evaporative" chiller, it consumes no water and works fine regardless of humidity, performing strong dehumidification as needed. The water/glycol is used to only to distribute heating and cooling between the outdoor unit and indoor units, no water is consumed.

The Chiltrix systems use a DC-inverter compressor and a DC-inverter water pump (both are variable speed) controlled together to achieve the best possible balance of water flow rate and compressor speed. A microcontroller continuously monitors the ∆T between the leaving and returning water, and flow rate, calculates the cooling load, and adjusts the pump and compressor speeds independently of each other to maintain the needed capacity with the lowest possible total power draw. All units are RS485/MODBUS Compatible.

Psychrologix™ Controller - the DHC (Dynamic Humidity Control) function is designed to dynamically control humidity in real time and operate the chiller above its already high efficiency rating. DHC prevents over-dehumidification and wasted energy. The CX34 with DHC dynamically manages compressor speed, pump speed, fan speed, and adjusts its loop temperature as needed to tightly manage humidity and increase efficiency.  DHC control allows the chiller to operate well above the IPLV rating at times when humidity is under control, resulting in EER far in excess of the official ratings.   See More Details.

 

What's In The Box

The CX34, CX35, and CX50 ODUs are a complete source of heating, cooling & hot water, With our technology there is no additional supply side needed, although according to your load report you may wish to add integrated dynamic backup heat (V18). You may also integrate with a boiler, solar thermal, solar PV or just about gnathic you can think of. The CX air to water heat pumps are air sourced, and efficiently exchange heating or cooling with the outdoor air, even when it is -15F or 120F outdoors. Wells, other ground or water sources, or cooling towers are not needed. You can use the CX-series air to water heat pump outdoor units with any brand of industry standard equipment including ductless fan coils, ducted or mini-duct type air handlers, radiant systems, etc. We also offer our own ultra-thin DC-Inverter CXI-series fan coil units, air handlers, mini-duct systems, tanks, etc.

In the outdoor unit we have incorporated the complete refrigeration system including the evaporator, condenser, all controls, valves, etc., as well as all refrigerant into a sealed self-contained outdoor unit. No refrigerant enters the building envelope which is more important than ever as the industry moves towards more efficient but more flammable and toxic refrigerants.

No refrigeration gauges, vacuum pumps, extra Freon, or special refrigeration/HVAC licenses or skills are needed to install the system. The installer will use basic PEX plumbing and electrical skills. System designs are provided free of charge by Chiltrix.

Full Inverter Variable Speed Components Including Compressor, Pump, and Fan.

Above left, standard AC unit running at full speed, either on or off. Above right, variable capacity DC inverter unit running to match the load and avoid the on/off cycle. In addition to using less watts per BTU at a given speed, the ability to vary the speed to match conditions saves even more since part-load efficiency is greater than full speed efficiency.

Anti-Corrosion Technology

Anti-Corrosion technology is used on all outdoor units to protect against salty air in coastal environments, and ensure a longer life in any environment. See complete anti-corrosion details.

 

Advanced Controls

The patented CX-series technology uses a controls methodology that, among other things, accurately matches compressor speed and water flow rate (BTU capacity) directly to the cooling/heating load using real-time dynamic control. In certain implementations, the heating or cling loop operating set point itself may also dynamically change in response to indoor humidity requirements as explained here or in response to outdoor temperatures.

Dynamic & continuously variable control of the Chiltrix air to water heat pumps allows normal operation between LWT 44F and LWT 62F, with an average up to EER 30.72 or higher. Operation is also possible as low as LWT 40F for extreme dehumidification, when needed.

Industry-Standard De-Rate Profile

	Glycol %     Water Factor   @10F ∆T GPM/ton 0%   500.4   2.40 10%   494.32   2.43 20%   488.56   2.46 30%   480.04   2.50 40%   463.08   2.60 50%   442.77   2.71 60%   421.35   2.84

At high elevations, air is thinner and a fan can blow less mass flow (labs. of air). This causes a de-rate of capacity as shown in the chart above-left. About glycol, there is no arbitrary capacity de-rate for adding glycol, however according to the percentages above, the pump speed must be increased to deliver the same BTU. And glycol raises the viscosity. Generally, there is a net loss of COP of around .0011 per each percent of glycol added. For example, if one started with a COP of 4.0 and added 30% glycol, the new COP would be around 3.968.

Defrost de-rate:

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All heat pumps must periodically stop heating, run for 1-2 minutes in reverse cycle, then wait a few minutes, and then resume heating. How frequently this will happen is a function of temperature and humidity. The above can be used as an approximate de-rate for high humidity heating conditions. In low humidity there may be little need for defrost. Fortunately, in most locations in North America we see very low humidity in the winter.

Certified by AHRI in accordance with the AHRI 550/590 (I-P) and AHRI Standard 551/591 (SI). NPLV rating is at W54F. Heating performance rated in accordance with AHRI 550/590 (I-P) and AHRI Standard 551/591 (SI) & IEC 14285 Standard. Heating of CX50 rated under AHRI 550/590 and certified by TUV under IEC14285

CX34 Specs & Performance Data
2 Tons Cooling, 2.8 Tons Heating
Seasonal EER 22.2 / COP 3.93

CX35 Specs & Performance Data
2 Tons Cooling, 3.4 Tons Heating
Seasonal EER IPLV.IP 22.4 / COP 4.67

CX50 Specs & Performance Data
3.5 Tons Cooling, 4.75 Tons Heating
Seasonal EER 21.2 / COP 4.62

 

All specifications are subject to change. Images are representative only.