This system can run at conditions of high or ambient temperature with high EER, it reduces costs up to 75%.
Features Technical Parameters Working principle

Water to water heat pump 

● Energy saving and environment friendly product 
Daishiba water source heat pump utilizes free renewable energy from ground, consuming much less energy without direct CO2 emission. It is efficient and economical alternative to both fossil fuel boilers and air-conditioning systems. 
This system are free from the effect of climate, it can run at rough conditions with high COP. Compared with common electric heater or gas boiler, water source heat pump reduces costs more than 75%. 

● Flexible applicability 
DAISHIBA water to water heat pump series can be applied in the independent and small scale space, such as multilayer apartments, villas, restaurants and entertainment places etc. It has a wide rang of capacity selection, from 6KW to 50KW. 

● Heating function 
Connected to insulation water tank, it can offer warm water all year around. 
If connected to the fan coils or floor coil, it could heat air in winter. 

● Features
Cooling function are option. Both heating only function and heating & cooling function are available, you can make a choice according to your requirement. 
·  Convenient operation. Microelectronics control, all temperature settings are set by manufacturer. System tests and adjusts water temperature automatically. All what user needs to do is just to press “ON/OFF ” button. System finishes the other operation automatically. 
·  Excellent performance. Adopt world famous components, and the best match of system design. Scroll compressor with high EER and low noise. High efficient heat exchanger insures the utmost using of system capacity. Professional air conditioner water pump insures smooth quiet operation. 
·  Easy to install. The system is designed with full consideration of insuring installation as easy as possible. Refrigerant circle is a sealed complete system finished by manufacturer. No needs for users to connect copper pipes or refrigerant charging. Hydraulic circle of system can be connected to hydraulic terminals by two tubes. 
·  Operating protection. System is designed with over voltage, under voltage, over load protection to insure safe operation. The microelectronics controller can start or switch off the machine by judging the water temperature. If the water temperature is lower than designed, the machine will be switch off to avoid freezing. The microelectronics controller can also supervise the status of components. Malfunction occurred would be transmitted to the controller and displayed through malfunction code.


Q1: Are you a factory or trading company?
A: We are the factory, and especially R&D, manufacturer and sell various heat pump euipment. We have engaged in the heat pump R&D and production over 10 years.

Q2: How to find a heat pump suitable for my product?
A: a. Tell us about your product details;

b. What functional heat pump products do you need;

c. Tell us your local minimum ambient temperature and maximum ambient temperature to recommend products that meet your needs;
d. Power supply specifications and special requirements used in your country. 

Q3: Is engineer available to serve oversea?
A: Yes, but the travel fee is paid by you. So actually to save your cost, We provide installation instructions and 24-hour online service and assist you till the end.

Q4: What is the payment term?

A: 30% T/T deposit and 70% T/T balance payment before shipping (If you purchase a sample that requires 100% payment, In order to avoid second payment, bank deduction fees will be generated again). Online trade assurance order, L/C, or as negotiated terms with clients.


Q5: How long is the warranty time?
A: 1 years of warranty. In guarantee period, if spare part broken, we will send you the parts free and we will pay the express fee. And please send us the spare parts back. when machine is out of guarantee period, we will provide you the spare parts by charge.

Q6: How can we make sure about the machine quality after we put the order?
A: Before delivery, we will send you the pictures for you to check the quality, and also you can arrange for quality checking by yourself or by your contacts in China.

Q7: We are afraid you won't send us the machine after we send you the money?
A: Please note our above business license and certificate. And if you don't trust us, then we can use Alibaba trade assurance service, guarantee your money, and guarantee your machine's on-time delivery and machine quality..

Q8: Why we should choose your company?
A: We are a professional heat pump manufacturer over 10 years, and we provide better after-sales service. We guarantee no risk for our deal.

Model Unit DWW-
HP HP 2 3 5 6 10 15 25 50
Rated heating
Heating capacity kW 6 9 15 18 30 45 75 150
Power input kW 1.4 2.1 3.48 4.18 6.98 10.49 17.4 34.88
Input current A 6.7 10 6.2 7.4 12.4 18.7 31 62.2
COP W/W 4.28 4.29 4.31 4.31 4.3 4.29 4.31 4.3
Rated cooling
Cooling capacity kW 5.6 8.4 14 16.8 28 42 70 140
Power input kW 1.34 2 3.33 4 6.64 9.95 16.63 33.25
Input current A 6.4 9.6 5.9 7.1 11.8 17.7 29.6 59.3
EER W/W 4.18 4.2 4.21 4.2 4.22 4.22 4.21 4.21
Annual combined energy efficiency W/W 4.22 4.24 4.25 4.25 4.26 4.25 4.25 4.25
Maximum input power kW 2.1 3.1 5.2 6.2 10.4 15.7 26 52.1
Maximum input current A 10.1 15 9.3 11.1 18.6 27.9 46.3 92.8
Power supply V/Hz/Ph 220V/50Hz/1Ph 380V/50Hz/3Ph
Compressor type / Rotary Rotary Scroll Scroll Scroll Scroll Scroll Scroll
quantity unit 1 1 1 1 2 2 2 4
Ground source side  pump type / Canned
 motor pump

quantity unit 1 1 1 1 1 1 1 1
power W 270 270 270 270 500 750 1300 2500
User-side heat exchanger type / High efficiency tank
flow rate m3/h 1.03 1.55 2.58 3.1 5.16 7.74 12.9 25.8
water resistance kPa 40 45 48 50 52 55 56 58
Ground side heat pump type / Tube-in-tube heat exchanger
Shell and tube heat exchanger 
flow rate m3/h 1.29 1.94 3.23 3.87 6.45 9.68 16.13 32.25
water resistance kPa 38 42 45 45 48.5 50.9 53.3 55.7
Throttling method / Capillary+Check valve
Electronic expansion valve
Refrigerant type / R410A R410A R410A R410A R410A R410A R410A R410A
charge kg 1.2 1.6 2.8 3.2 2.8*2 4.0*2 6.5*2 6.5*4
Dimension H*W*D mm 400*600*530 560*650*730 560*650*730 560*650*730 1075*800*900 1075*800*900 1850*1300*1440 1850*2600*1440
Weight Net weight kg 56 84 106 112 165 240 560 1100
Gross weight kg 62 92 117 123 182 264 616 1210
Noise level dB(A) 65 67 67 68 69 70 71 72
Water tank Buffer tank Lh 40 60 100 100 200 300 500 1000
Hot water tank t 1.5 2.5 4 5 8 12 20 40

How Does a Heat Pump Work?

Heat pumps use electrical energy and take low grade heat energy from the outdoor air to heat refrigerant which in turn heats water for domestic use and space heating. The efficiency of a heat pump is known as the coefficient of performance or COP. This is a ration of the heat delivered to power consumed.

At the beginning of the first phase the refrigerant is cold low pressure liquid.
1. The refrigerant passes into the evaporator and heat energy from the outside air passes over the evaporator causing the refrigerant to increase in pressure and change to warm vapor.

2. This warm vapor then enters the compressor where its temperature increase as a result of the compression process and turns into a hot gas.

3. The hot refrigerant gas is then condensed as it passes across one side of a plate heat exchanger, and this is transferred via the primary water circuit to heat up the water tank.

4. Despite dropping in temperature, the cool vapor still has a high pressure and to reduce this pressure the vapor passes through an expansion valve. This cause the pressure to drop and the temperature lowers, returning the refrigerant to its initial state of cool low pressure liquid.

This process is repeated.

It is only the refrigerant that passes through this cycle; the water is heated as it travels through the plate heat exchanger. The heat energy from the refrigerant passes through the plate heat exchanger to the cooler water which increase in temperature. This heated water enters the home heating circuit and also be used to provide domestic hot water via a hot water tank.