This year (2020), the National Day and Mid-Autumn Festival coincided with each other. Due to the influence of the weather, they ended up in a "two heavens of ice and fire": on the one hand, there is a rising festive atmosphere, on the other hand, the temperature is "steeply turning down".
Many scenic spots in our country "unlocked" the winter scene mode early. Snow town in Heilongjiang is covered in silver, Taibai Mountain in Shaanxi and Qiongzhi in Yushu, Laojun Mountain in Luoyang, Henan, Baiyun Mountain and other scenic spots are flying with snowflakes. A snow will decorate Jiuzhaigou, Sichuan Dreamlike. In order to withstand the sudden low temperature, some tourists even wrapped in quilts...

In fact, in the face of cold air, not only people need to keep warm, but also equipment, especially swimming pool constant temperature equipment. As long as no anti-freezing measures are taken, there is a risk of being frozen out. So, let’s take a look at the anti-freezing measures of swimming pool air source heat pumps with the editor today.
Precautions for antifreeze of air source heat pump unit:
1. Pipe insulation
When the ambient temperature reaches the freezing point, the water temperature of the air source heat pump drops extremely fast. If the hot water pipe and the return pipe are not insulated, the heat consumption will be accelerated and it will be easy to freeze. If you find that the air source heat pump pipe is frozen but not yet cracked, do not knock on the pipe or pour hot water on the pipe, but wait for it to melt naturally.

A swimming pool in Jinan Hengda City uses AQUA air source heat pump

2. Check the ventilation system of heat pump equipment
① Check and remove the water-proof and dust-proof covers of the heat pump and auxiliary equipment, and the sundries before and after the equipment, to ensure that the heat pump is running without foreign matter interference.
② Check and remove obstructions to ensure that the heat pump equipment maintains a good ventilation environment.
3. For the unit that is already in use, it is necessary to ensure that the main engine and the water pump are in a 24-hour power-on state
Keeping the unit energized in winter can ensure that the air source heat pump provides heat all the time; at the same time, it can also ensure that the unit does not form frost and make it operate normally. The air source heat pump unit will activate the automatic antifreeze protection function when the outdoor temperature is low in winter. For example, the AQUA air source heat pump can be operated around the clock in all seasons of the year, and is not affected by bad weather such as night, cloudy, rain and snow. It also has winter anti-freezing protection and intelligent and flexible defrosting. According to relevant technical personnel of AQUA, AQUA air source heat pumps can set defrost parameters and control schemes according to the climate conditions in different regions, making defrosting more thorough, flexible and energy-saving.

Gaozhou Huanggang Experimental School in Maoming City uses AQUA air source heat pump equipment

4. If the unit is not used for a long time, the water in the main engine and the pipeline must be drained before powering off
If the air source heat pump unit does not operate in winter or needs to be shut down for a long time, such as frequent power outages, shutdown of the unit at night, or winter vacation, all water in the unit, water pump, and outdoor pipeline should be drained to prevent the unit from freezing. And cut off the power supply, put on the protective cover. When running again, please check the system thoroughly before starting up.
5. Antifreeze must be added to the unit without draining water
According to actual usage conditions, in winter when the unit is inconvenient to drain water and there may be water and power outages, the entire air source heat pump must be added with antifreeze, and it must be based on the local minimum temperature as an important parameter for selecting antifreeze.

Shenzhen Pingshan Experimental School uses AQUA air source heat pump units and three-in-one constant temperature dehumidification heat pump equipment

6. Regularly check the operation of the equipment
For the unit with antifreeze automatic control system: it is necessary to ensure that the unit, water pump, etc. are energized, and the unit will automatically turn on the antifreeze function when the relevant valves of the unit system are in the open state. Power failure, water shortage, wrong setting, the antifreeze protection function of the unit can not be turned on normally. For units that do not have an antifreeze automatic control system installed: the antifreeze measures can be done from the aspects of draining water, oiling, and adding antifreeze. For these professional operations, you can find specialized after-sales maintenance personnel to regularly come to repair and maintain.
AQUA reminder:
The key to the antifreeze protection of the air source heat pump is to prevent the water in the host system from freezing and expanding, thereby damaging the system. In order to let everyone use the heat pump system better and avoid unit failures, please be sure to operate and use the air source heat pump in accordance with the manual or instructions of the air source heat pump. Only the correct use, maintenance and maintenance can the heat pump unit equipment operate stably for a long time.