DHW-28-300L-DAISHIBA Heating & Refrigeration Equipment Co.,Ltd

All in one Domestic Heat Pump Water heater (150L~500L)

1.The sanitary hot water heat pump is one of the most economical systems to heat the water or family domestic use.Using free renewable energy from the air ,the unit is highly efficient with low running costs.DAISHIBA all In One heat pump is designed for domestice sanitary hot water . As a lovely equipment,it could be put indoor. It is with 3 times higher efficiency than that of gas boiler or electrical heater and it can also be combined with solar heating system.Therefor this could reduce costs for the users in a big way

2.Hot water and dehumidification Unit can be placed in the laundry room or clothing room. When it produces hot water it lowers the temperature and dehumidifies the room as well. The advantage can be experienced particularly in the humid season.

1. Compact design

Units are especially designed for offering sanitary hot water for family use. Its extremely compact
structure and elegant design are suitable for indoor installation.

2. Ecological and Economical Heating

Units are the most efficient and economical alternative to both fossil fuel boilers and heating systems.
By making use of the renewable source in the air, it consumes much less energy without direct CO2 emission.

3. Multiple Functions

The special design of the air inlet and outlet makes the unit suitable for various ways of connections.
With different ways of installation, the unit can work as just a heat pump but also as a fresh air blower, a dehumidifier, or an energy recovery device.

4. Application:

1. Waste heat recovery and domestic hot water
The system can be used to recover high waste heat in areas such as a kitchen, utility room and so on, even under low temperature conditions such as in winter.

2.Domestic hot water and dehumidifier
The system can be used to reduce the temperature and humidity in a bathroom or washing room.

3.Domestic hot water & reducing the temp. of a storage room
The system can be set up to reduce the room temperature of a beverage & wine/food/fruit store
by providing fresh cold air when you use your hot water.

FAQ

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 me 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.

Volume	Power Input	User Needs
100L	500W	no more than 2 people
150L	500W	For 3-4 people
200L	500W	For 4-5 people
250L	500W	For 5-6 people
300L	500W	More than 7people, or use bathtub

Model	Unit	DHW-20a-150L	DHW-20a-200L	DHW-20a-250L	DHW-20a-300L	DHW-28-150L	DHW-28-200L	DHW-28-250L	DHW-28-300L
Heating capacity	kW	2.0	2.0	2.0	2.0	2.8	2.8	2.8	2.8
COP	W/W	3.9	3.9	3.9	3.9	4	4	4	4
Water tank volume	L	150	200	250	300	150	200	250	300
Rated heated Water outlet	L/h	42				60
Rated houtlet water temp.	℃	55
Max outlet water temp	℃	60
Rated power input	W	510				700
Rated current	A	2.4				3.3
Electric heater power	W	2000				2800
Electric heater current	A	9.6
Power supply	V/Hz/Ph	220-240V/50Hz/1Ph
Compressor type	/	Rotary
Number of Compressor	/	1
Heat exchanger type	/	External coil
Throttling device	/	Electrical expansion valve
Fan type	/	High efficiency and low noise centrifugal fan
Fan discharge	/	Top with 5m exhaust pipe
Fan quantity	/	1
Fan input	W	200
Fan speed	RPM	920
Ambient temperature	℃	0℃~43℃
Refrigerant	/	R134a/R410A
Noise in 1 metre distance	dB	43dB(A)
Water pipe conneciton size	mm	G3/4''
Cabinet	/	Galvanized powder coated steel
Low pressure protection system	/	Yes
High pressure protection system	/	Yes
Automatic defrosting system	/	Yes
Product Net weight	kg	78	84	90	100	81	87	93	103
Product dimensions	mm	Φ560*1500	Φ560*1700	Φ560*1970	Φ650*1800	Φ560*1500	Φ560*1700	Φ560*1970	Φ650*1800
Testing condition	Ambient temp.(DB/WB)=20℃/ 15℃, water temp. Input/output=15℃/55℃

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.