—— Product Description ——

Withair® Air source heat pump unit is according to the Reverse Carnot Cycle principle, drive by a little bit of electricity, the low temperature and low-pressure refrigerant absorb a large amount of heat from air, and be vaporized, then be compressed to high temperature and high-pressure gas by compressor, enter into the water heating exchanger transferring heat into water to make hot water, then throttled by electric expansion valve and continue new cycle, a steady stream of making hot water.

The heat pump water heater is a new type of water heater product with high efficiency, energy saving, environmental protection, safety.

The heat generated by Withair®  air source heat pump water heater is several times that of electric energy consumption. Compared with traditional electric water heater, gas water heater, the operation cost can be saved by 60% ~ 70%, and the investment cost is easy to recover.

Withair® EVI heat pumps adopt EVI compressor and refrigerant injection system, as well as Withair® unique EVI digital control technology, effectively realize two-stage compression, obtain stronger cooling capacity, heating capacity and higher efficiency, it still has strong heating capacity at low ambient temperature.

The maximum water temperature of Withair®  EVI direct heat pump water heater up to 60 ℃.

—— The Key Advantages Include ——

■ 55 ℃ high temperature hot water directly enters the top of the water tank and can be used for heating water at any time.

■ When using hot water, tap water is added into the bottom of the water tank and is not mechanically mixed with the original hot water in the water tank. Part of the cold water is heated into 55 ℃ hot water by the heat pump unit for direct water supply, and the other part of the cold water pushes out the hot water from bottom to top by its own pressure in the water tank. The water supply temperature and pressure of the hot water are stable and the user is comfortable with water.

■ The hot water produced by the unit can always be used immediately and effectively, which is more energy-saving and less operating cost.

■ Compared with other hot water systems, the volume of water tank can be reduced by more than 30%.

■ The project does not need additional heating water tank, water supply pump, water level device, solenoid valve, controller, etc. the system is simpler and more reliable.

■ When the water heater operates for defrosting in winter, the outlet water enters the lower part of the water tank, which not only has reliable defrosting operation and high efficiency, but also will not reduce the water temperature at the upper part of the water tank and affect the comfort of hot water use.

■ It is better applicable to hotels, public bathrooms, school bathhouses, foot baths, beauty salons and bodies, hospital inpatients, student dormitories, military camps, villas, etc.

■ It can be directly connected to the existing boiler system, and the original boiler system can be used as auxiliary heating.

■ CNC water flow regulating: The water flow regulating valve imported from Japan and digital control technology are adopted to accurately and quickly control the outlet water temperature, ensure stable hot water output and ensure the reliable operation of the unit.

■ Precise defrosting: Whether in high cold and low humidity climate or low cold and high humidity climate, ours digital control defrosting technology can always scientifically judge the thickness of frosting layer and the time required for defrosting. If there is no frost, it will not defrost. If there is frost, it will enter and exit defrosting in time, defrost thoroughly and do not defrost excessively, so as to improve the operation efficiency of the unit in winter.

■ Patented technology: Withair® patented direct heating technology effectively solves the defects of existing domestic hot water products, promotes the further development of heat pump hot water technology, and can be used reliably in the climate environment of -25℃ ~ 56℃.

■ High quality special compressor: It adopts the special compressor for heat pump of Panasonic, Hitachi and other international brands, which is suitable for high-temperature hot water and a wider ambient temperature range, with good reliability and long service life.

■ Electronic expansion valve: The advanced digital control technology of electronic expansion valve accurately controls the flow of refrigerant, so that the unit can be in the best operation state all year round, avoids excessive load of compressor in summer and liquid hammer damage in winter, and makes the operation of the unit more stable and efficient.

■ Tube in tube heat exchanger: The hot water side heat exchanger adopts coaxial tube in tube heat exchanger, and the inner copper pipe is of multi channel spiral design. Strong turbulence is generated when water passes through, forming flushing on the inner wall of the copper pipe, effectively improving the heat exchange efficiency, preventing scaling and avoiding the attenuation of heat exchange efficiency caused by long-term accumulation of scale.

■ Power off memory function:  In case of power failure during the operation of the unit, the unit will automatically restart when the power supply is restored and continue to work according to the state before power failure.

Antifreeze function:  The unit has two-stage antifreeze function, which can effectively avoid the damage of waterway freezing caused by standby or shutdown of the unit at the ambient temperature below 0℃.

■ Return water control function: This function allows users to turn on the tap to have hot water without draining a lot of cold water or waiting for a long time. The unit has two operation modes: manual water return and automatic water return. Manual water return: operate the water return key on the wire controller to return water. There are four options for automatic water return:

● Morning and evening (5:00～8:00,17:00～23:00)

● Morning, noon and evening (5:00～8:00，10:30～12:30,17:00～23:00)

● 5:00～23:00

● All the day

■ Auxiliary electric heating control: Two control modes: automatic and forced. Automatic operation: when the ambient temperature is low, the water temperature is low, or the unit fails, the auxiliary electric heating will operate automatically. In order to avoid excessive use of electric heating and save energy consumption, the electric heating will stop when the water temperature reaches 50℃. Forced operation: start and stop according to the water temperature set by the water tank.

Modular combined control: Multiple units can be installed in modular combination, controlled by one wire controller, and up to 16 units form a modular combination. In the modular combination, it can also automatically judge the number of units put into operation, rest more for long operation time and work more for short operation time, so as to prolong the service life of the unit.

Protection and fault self-diagnosis: In case of protection or fault during unit operation, self diagnosis, adjustment and repair will be carried out first. After repair, the unit will continue to operate and cancel the protection or fault code. If the unit cannot repair by itself, the protection or fault code will be reported all the time.

Multiple protection functions: 

● high voltage protection

● low voltage protection

● compressor exhaust temperature protection

● water flow protection

● inlet water temperature protection

● outlet water temperature protection

● power phase sequence and phase loss protection

● current protection

Timing function:  The unit has two-stage timing function, which is convenient for users to set timing according to water consumption. There are also two kinds of timed aging: single effective, (daily) cycle effective.

Remote control / communication: 

● Stand-alone controls: the unit control system is equipped with remote start and stop contacts, and users can apply remote switch control according to needs.

● Building automation system (BAS) controls:  equip BACnet, RS-485 communication interface with built-in Modbus communication protocol, which allows networked group control via system integration with BAS.

—— You May Like ——

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R410A — 220V/380V 50Hz

EVI R410A — 220V/380V 50Hz

Notes:

The data in the following table are tested under rated conditions as follows:

1. Heating test conditions: ambient air dry bulb temperature 20°C, wet bulb temperature 15°C;

2. Entering water temperature 15°C, leaving water temperature 55°C;

3. All specifications are subject to change without prior notice, please refer to the nameplate.