EVI Air-Cooled Inverter Heat Pumps - Withair® Heating and Cooling, Air Conditioning, Heat Pump, Chiller, Industrial Process Cooling & Heating Systems, and Indoor Air Quality

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EVI Air-to-Water DC Inverter Heat Pumps

Capacity Range: 2.5 to 166 tons, 50 and 60 Hz
Refrigerant: R-410A, R-454B
Compressor Type: DC Inverter Hermetic Scroll

Unit can work at - 35°C ambient
Heating fluid temperatures up to 60℃
Reliable DC inverter EVI compressor maximizes performance & reliability
Connectivity, flexibility and serviceability enabled by smart controller
Designed to improve efficiency and reduce sound at part load
Split version for option
10~120rps inverter technology to fast higher water temperature
Smart microchip control, LCD user interface, capable of one-key startup
Widely operation range: at cooling 5°C ~ 48°C, at heating -35°C ~ 48°C
DC inverter technology to sure heating capacity “0” loss when ambient temperature >-15℃

OVERVIEW
MODELS
OPTIONS
RESOURCES
SERVICES
RELATED PRODUCTS

Overview

Enhanced Vapor Injection (EVI) Technology

EVI stands for “Enhanced Vapor Injection” and is a technology used on our cold climate heat pumps to achieve higher performance at lower temperatures. An EVI heat pump uses a 3rd smaller internal plate heat exchanger called an “Economizer” within the refrigeration cycle. By utilizing a bypass valve some of the hot refrigerant vapor on the condenser is bypassed to a HX which combines with the colder gas on the Evaporator expansion side. The heat energy is transferred raising the gas temperature even further which is then injected at mid-range pressure into the head of the scroll compressor through a separate vapor injection port. Using EVI heat pump technology, we can overcome the limitation of maximum flow temperature that other cold climate heat exchangers encounter. EVI Heat Pump technology allows more heat to be delivered resulting in a better COP at much lower temperatures.
Superior Heating Ability

Unit can control well the frequency and EEV according to the ambient temperature and water temperature and the refrigerant volume of major loop of refrigerant system, even when ambient temperature is under -25℃, heat pump can still maintain same rated good heating capacity output without any auxiliary electric heater.
Special Design for Anti-Freezing and Anti-Frosting

With block up slopes on two sides of button + anti-freezing element on the bottom of heat pump and the use of special liquid distribution technology, when unit works in heating mode, the temperature of refrigerant in the heat exchanger’s bottom copper tubes will not decrease in order to ensure no frosting on it and smooth drainage.
50% Speed Up Heating & Cooling Time

After heat pump is start, unit can quickly pick and choose the best compressor and fan motor operating frequencies and the heat pump EEV opening automatically according to the heating or cooling demand by smart inverter control technology for the first time heating, inverter fast heating can save 50% heating time than traditional heat pump.
Built in Hydraulic Kit for Option

Optional advanced connectivity kit including circulation water pump, 3-way valve, expansion tank, and auxiliary electrical heating module for fast installation, save installation time and cost.

Models

co Specifications	W01R1-8IE	W01R1-12IE	W01R1-15IE	W01R1-18IE	W01R1-20IE	W01R1-25IE	W01R1-30IE	W01R1-38IE
Capacity (Ton)	2.5	3.5	4.2	5.0	5.8	7.1	8.6	11.0
Compressor	EVI & Inverter	EVI & Inverter	EVI & Inverter	EVI & Inverter	EVI & Inverter	EVI & Inverter	EVI & Inverter	EVI & Inverter
Evaporator	Efficient Tank	Efficient Tank	Efficient Tank	Efficient Tank	Efficient Tank	Efficient Tank	Efficient Tank	Efficient Tank
Condenser	High Efficiency	High Efficiency	High Efficiency	High Efficiency	High Efficiency	High Efficiency	High Efficiency	High Efficiency
Voltage	208, 230	208, 230	208, 230	208, 380	208, 380	208, 380	208, 380, 460	208, 380, 460
Frequency	50 and 60	50 and 60	50 and 60	50 and 60	50 and 60	50 and 60	50 and 60	50 and 60
Refrigerant	R-410A, R-454B	R-410A, R-454B	R-410A, R-454B	R-410A, R-454B	R-410A, R-454B	R-410A, R-454B	R-410A, R-454B	R-410A, R-454B
Heat Recovery	Option	Option	Option	Option	Option	Option	Option	Option
Split Version	Option	Option	Option	Option	Option	Option	Option	Option

co Specifications	W01R1-45IE	W01R1-65IE	W01R1-72IE	W01R1-105IE	W01R1-136IE	W01R1-175IE	W01R1-290IE	W01R1-580IE
Capacity (Ton)	13.0	18.6	20.0	30.0	40.0	50.0	83.0	166.0
Compressor	EVI & Inverter	EVI & Inverter	EVI & Inverter	EVI & Inverter	EVI & Inverter	EVI & Inverter	EVI & Inverter	EVI & Inverter
Evaporator	Shell & Tube	Shell & Tube	Shell & Tube	Shell & Tube	Shell & Tube	Shell & Tube	Shell & Tube	Shell & Tube
Condenser	High Efficiency	High Efficiency	High Efficiency	High Efficiency	High Efficiency	High Efficiency	High Efficiency	High Efficiency
Voltage	208, 230	208, 230	208, 230	208, 380	208, 380	208, 380	208, 380, 460	208, 380, 460
Frequency	50 and 60	50 and 60	50 and 60	50 and 60	50 and 60	50 and 60	50 and 60	50 and 60
Refrigerant	R-410A, R-454B	R-410A, R-454B	R-410A, R-454B	R-410A, R-454B	R-410A, R-454B	R-410A, R-454B	R-410A, R-454B	R-410A, R-454B
Heat Recovery	Option	Option	Option	Option	Option	Option	Option	Option
Split Version	Option	Option	Option	Option	Option	Option	Option	Option

Factory Installed Options

Unit Options

Split Version
Low Temperature Brine
Wide Ambient Operation
Frost Prevention Kit
Electric Heaters
Expansion Tank
Vibration Isolators
Sound Attenuation
Suction Shutoff Valves
Liquid Line Solenoid Valve
Evaporator Inlet Strainer
Double Evaporator Insulation
Complete Coat Condenser Coil
Corrosion Protected Condenser Coil
Metal Mesh for Condenser Coil Protection
Partial Heat Recovery or Total Heat Recovery
Integrated Pump Packages
Condensate Overflow Switch
High Efficiency Inverter Compressor
High Efficiency EC Fan
High Fault Short Circuit Current Rating
Microchannel Condenser Coil
Stainless Steel Heat Exchanger
Stainless Steel Frame
Flanged Water Connection Kit

Controls Options

Modbus, BACnet Communications Interface
Withair® Wireless Components
Door Mounted User Display
Remote User Interface
Fault Detection & Diagnostics
Flow Switch
Remote Input
Remote Output

Electrical Options

Quick Start and Fast Loading
Circuit Breaker
High Short Circuit Current Rating
Ground Fault Protection
115V Convenience Outlet
Power Connections
Multi-Point Power with Disconnect Switch

Resources

Name	Size	Download
Withair® Packaged Rooftop & Split DX Systems-Line-Card.pdf	550KB	Download
Withair® Solutions Offering-Line-Card.pdf	4.00MB	Download
Withair® HVACR SYSTEM SOLUTIONS OFFERING_2025 Version.pdf	3.54MB	Download
Withair® Water-Cooled-Chillers-Line-Card.pdf	483KB	Download
Withair® Air-Cooled-Chillers-Line-Card.pdf	679KB	Download
Withair® Air-Cooled-Heat Pumps-Line-Card.pdf	721KB	Download
Withair® Ground(Water)-Source-Heat Pumps-Line-Card.pdf	502KB	Download
Withair® Industrial Process Cooling & Heating Systems-Line-Card.pdf	506KB	Download
Withair® Air-Side-Products-Line-Card.pdf	1.69MB	Download