Direct Heating Air-to-Water Heat Pumps - Withair® Heating and Cooling, Air Conditioning, Heat Pump, Chiller, Industrial Process Cooling & Heating Systems, and Indoor Air Quality

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Direct Heating Air-to-Water Heat Pump Water Heaters

Capacity Range: 12 to 84 kW, 50 and 60 Hz
Refrigerant: R-410A, R-454B
Compressor Type: Hermetic Scroll

Applied range: DHW, floor heating, radiator heating, fan coil heating
Special compressor: specially designed for heat pump water heater
Unit runs or stop automatically according to water temperature
Connectivity, flexibility and serviceability enabled by smart controller
Electric expansion valve regulates the flow of refrigerant precisely
Air exchanger(Fins-coil) with hydrophilic coating
Intelligently & automatically judge the frosting degree & accurately defrost
Modbus RS485, BACnet communication interface
Automatic prevent freezing in the winter
Water exchanger: tube in tube heat exchanger, Internal spiral design, high thermal efficiency and effective to prevent scaling

OVERVIEW
MODELS
OPTIONS
RESOUTCES
SERVICES
RELATED PRODUCTS

Overview

Direct Heating System

The cold water is heated to 55℃ at one time (ONE-TIME heating). When the hot water is in use or the water tank temperature is low, the unit runs in direct heating mode. When the water tank temperature is high, the machine runs in circulating heating mode. Compared with the circulating system, stable water supply temperature, the hot water utilization rate of the direct heating system is higher, the volume of the water tank can be reduced by more than 30%.
Energy Efficiency

Withair® advanced heat pump and inverter technologies deliver optimum energy efficiency.
Quiet Operations

Unique designs, including inverter-driven compressors and natural convection heat distribution, ensure quiet operation of Withair® indoor and outdoor units.
Modular Control Design

Units installing combine freely, one controller can control maximum 16 pcs units, and the quantity of running compressors will be auto adjusted according to water temperature changing.
Maximize System Performance by Deluxe Controls

The smart electronic controls are unique to Withair’s equipment. Designed for enhanced component protection and optimal system performance, the microprocessor board is factory-wired and ready for field installation. Optional advanced connectivity kit including connectivity to any BMS on Site.

Control features include: Reversing valve coil; Compressor protection; Compressor delay on start; Random start delay; Anti-short cycle timer; Brown-out protection; Low pressure time delay; Low and high pressure switches.

Models

Specifications	WFYRS-11E1M	WFYRS-19E2M	WFYRS-38E2M	WFYRS-42E2M	WFYRS-76E2M
Heating Capacity (kW)	11.0	19.0	38.0	42.0	76.0
Rated Hot Water Output (L/h)	235	407	814	900	1628
Direct Heating Hot Water (℃)	55	55	55	55	55
Compressor	Hermetic Scroll	Hermetic Scroll	Hermetic Scroll	Hermetic Scroll	Hermetic Scroll
Voltage	220~240	380～415	380～415	380～415	380～415
Frequency	50 and 60Hz	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
COP	4.40	4.55	4.59	4.57	4.56
Modbus RS485, BACnet communication interface	Option	Option	Option	Option	Option

1 co EVI Version Specifications	WFYRS-12E1PM	WFYRS-21E2PM	WFYRS-42E2PM	WFYRS-84E2PM
Heating Capacity (kW)	12.0	21.0	42.0	84.0
Rated Hot Water Output (L/h)	257	450	900	1800
Direct Heating Hot Water (℃)	55	55	55	55
Compressor	Hermetic Scroll	Hermetic Scroll	Hermetic Scroll	Hermetic Scroll
Voltage	380～415	380～415	380～415	380～415
Frequency	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
COP at +20℃	4.41	4.45	4.45	4.45
COP at +7℃	3.75	3.86	3.88	3.88
COP at -12℃	2.35	2.4	2.41	2.42
Modbus RS485, BACnet communication interface	Option	Option	Option	Option

Factory Installed Options

Unit Options

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
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® Water-Cooled-Chillers-Line-Card.pdf	606KB	Download
Withair® Air-Side-Products-Line-Card.pdf	270KB	Download
Withair® Ground(Water)-Source-Heat Pumps-Line-Card.pdf	786KB	Download
Withair® Air-Cooled-Heat Pumps-Line-Card.pdf	1.03MB	Download
Withair® Air-Cooled-Chillers-Line-Card.pdf	929KB	Download