Our Blog


Why the Central Air Conditioning System Need a Buffer Tank?

buffer tank air con 300x227 Our Blog1. The buffer tank increases water capacity of the system, which can reduce the numbers of starts and extend life of the compressor.

There are too little water in a central air conditioning system without a butter tank. When it begins to work, the air conditioner will heat the water to the set temperature in a very short time. Then it will stop working. The hot water will be cold very soon so the air conditioner has to start working again. Frequent starts and stops will greatly reduce the life of compressor and wast much energy as well.

If there is a buffer tank in the air conditioning system, the water temperature becomes more stable, the times of starts and stops become less, and the life of compressor becomes longer.

Read more

Heat Pump Frost/Ice/Freeze Up: Why and What-to-do?

frozen heat pump2 300x232 Our Blog

heat pump frost up in winter

First of all, it's completely normal for the out-door unit of your air-water heat pump to be covered by frost or light ice during cold winters. Before it becoming too heavy, your heat pump will go into the defrost mode to remove the coating of frost or ice.

When the defrost function does not work accurately any more, your air-water heat pump could be frosted/iced/freeze up abnormally and can not defrost well. Your heat pump will lost its heating capacity. The performance, why and what-to-do for abnormal frosting/icing/freezing are listed below:

 

 

Read more

How to Install a Household Central Air Conditioner System?

mmexport1447039027372 300x200 Our Blog

Household central air conditioners are more and more popularized for they are more comfortable than common spitted household air conditioners. While the installation of a household central AC system is much more complicated. You need to know these tips when you plan to add a new central AC system to your house:

1. Central Air Conditioners are fitted to big houses, not fitted to small apartments. Because the indoor units need to be concealed installed on the top, the central AC system need a lot of space. Those house with the height less than 2.7 miles are not good for a central AC system.

Read more

Valves for Heat Pump Water Heating Systems: Features & Applications

mmexport1446082309008 150x150 Our Blog

gate valve

There are various of valves in a heat pump water heating system. The features and functions of different valves are not same. So it's important to know them clearly.

1. Gate Valve

Features: Also known as a sluice valve, is a valve that opens by lifting a round or rectangular gate/wedge out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar, so gate valves are often used when a straight-line flow of fluid and minimum restriction is desired.

Read more

How to Clean Air-Water Heat Pumps?

cleaning Our BlogThere're a lot of impurities in tap water and dust in ambient air. So air-water heat pumps need to be cleaned periodically. Or the working performance will be brought down and life span will be shortened. Cleaning is one of the most important part of maintenance for air source heat pumps.

Before you start to clean your heat pumps, remember power off the heat pump system. There are 4 parts in your heat pump system which need to be cleaned periodically:

1) Filter. Take off the filter at the water pipe system. Wash the filter net to remove impurities. Then put the filter back.

Read more

What if Heat Pumps Unused for a Long Time?

power off Our BlogIt wouldn't hurt if you go a long period without using your air source heat pumps. While you need to pay attention:

1) Drain off water in the heat pump system. Or the unit could be frost damaged when it's cold.

2) Get your heat pumps covered to keep them clean.

3) Don't forget to turn off the power.

Read more

Climate Class Ratings (T1, T2, T3) for Air Source Heat Pumps

climate 150x150 Our BlogWhen you are trying to find the right air source heat pump unit for your own home or business, it is important to pay close attention to the heat pump’s climate class ratings. Different types of heat pumps will have better results in different parts of the world, so you need to make sure that you are getting the right kind of air source heat pump unit that matches your climate needs. There are three different climate class ratings when it comes to air source heat pumps. These three ratings are T1, T2, and T3. Let’s take a closer look at what these ratings mean and what they mean for your air source heat pump selections.

Read more

Solar Heat Pump Hybrid Water Heater System (Real Case)

With a WellFort monobloc domestic air to water heat pump, you can easily have a super energy-saving solar heat pump hybrid water heater (which combined solar water heater and heat pump water heater) like this:

1) When it's sunny days, shut off the heat pump with the control panel, and keep the solar open. So you can have enough hot water without any electric consumption;

Read more

Cold Weather Heat Pumps V.S. Ordinary Heat Pumps

2 13113015305E29 150x150 150x150 Our Blog

cold weather heat pumps

There are 5 main difference when it comes to the comparison between cold weather heat pumps and ordinary heat pumps:

1. Ambient air temperature range. Cold weather heat pumps are able to run in ambient air temperature ≥ 25℃; while it's -7℃ for ordinary heat pumps.

2. Compressor. Cold weather heat pumps use Copland EVI compressors specially; Ordinary heat pumps use common scroll or rotary compressors.

Read more

Cases of Heat Pumps for Ultra Cold Climate

20120712084522862 Our Blog

a hotel in North China, -20℃.

In 2010 WellFort launched R&D of heat pumps for ultra cold climate. The heat pumps for ultra cold climates are equipped with Copland EVI (Enhanced Vapor Injection) compressors specially and applying superior heat exchange technology. This type of products can be installed in cold weather regions, such as North Europe, North America, and North China. Even if low to -20℃, the heat pumps are able to work normally and reach a COP value of 2.0. Here are some photos of our cases.

Read more

High Temperature Air Source Heat Pumps Heat Water Up to 80℃

htashp 300x182 Our BlogOrdinary air source heat pumps heat water to 60℃ at the most. WellFort high temperature air source heat pumps can supply 80℃ hot water for both DHW and commercial water heating. It's a large improvement.

WellFort high temperature air source heat pumps have below key technologies:

1) Specified compressors for high temperature units: WellFort HT-ASHPs use separated compressors instead of ordinary mono-bloc compressors . The motor is separated from the compressor unit. Thus high temperature refrigerant won't damage the motor winding.

Read more

IEC for Heat Pumps in South Africa

iec Our BlogIn South Africa, you may need IEC test reports for your heat pump business. They are IEC60335-2-40 and IEC 60335-1.

What's IEC? IEC is the International Electrotechnical Commission, a not-for-profit, non-governmental organization, founded in 1906. The IEC's members are National Committees, and they appoint experts and delegates coming from industry, government bodies, associations and academia to participate in the technical and conformity assessment work of the IEC. To know more about IEC please go to IEC official website.

IEC60335-1 is for "safety of household and similar electrical appliances". The documentation of IEC60335-1 is here for reference (148 pages).

Read more

How to Choose a Retrofit Heat Pump for an Existing Geyser?

IMG 1198a 150x150 Our Blog

Retrofit Heat Pump by WellFort

A retrofit heat pump usually means a heat pump which can be installed for an existing geyser (or an existing cylinder).  This way, you can just buy a heat pump and save the money for a water storage tank.

A retrofit heat pump should be:

  • split type. A monobloc heat pump has an integrated water tank with it, which is not needed at all. While a retrofit heat pump is just a heat pump main unit, and your existing geyser act as its water tank.
  • with a built-in circulator water pump. A retrofit heat pump is heating water when water is circulating between the heat pump and the geyser. The circulator water pump is the device making water circulate. A built-in circulator water pump is the best choice, for a exterior one is too complicated for users and installers.
    Read more

List of Heat Pump Suppliers in South Africa

There're dozens of heat pump suppliers in South Africa at least. Most of them are dealing with air source heat pumps (air-water heat pumps) for DHW, geyser updating, and central water heating. In South Africa there are few heat pump manufacturers. Many of the suppliers import their heat pumps from China. Some of the suppliers are dealing with products form America, Japan, and Australia.

Read more