The temperature drops immediately, and the temperature of water normally used in ceramic sanitary ware is above 4℃, and the water below 4℃ will freeze and expand, which will rupture the ceramic body and valve core. If your home has been installed but no one is staying, please close the main water valve in time, drain the remaining water from the faucet shower and bathroom, and close the triangle valve and doors and windows to prevent the ceramic sanitary ware from freezing and cracking due to the low temperature. In cold weather, the gas water heater must drain water to prevent freezing.
Friendly reminder: the frost crack of the product is not within the warranty scope stipulated by the state.
2. In recent days, the temperature in China has dropped in a wide range, and the lowest temperature in Beijing has reached-15 degrees Celsius, which is the lowest temperature in the same period in 30 years.
The low temperature directly leads to various failures of gas water heaters in some families. Recently, many users reported that the gas water heater in their home was frozen and cracked, which led to the emergence of "Golden Mountain" in their home. So how should consumers freeze the gas water heater at home? What else should I pay attention to in use?
3. ● Be careful of "flooding Jinshan" and beware of freezing and cracking of gas water heaters in winter.
Recently, some media reported that Ms. Yang, a consumer in Beijing, staged a "golden mountain full of water". The extremely cold weather in recent days caused the gas water heater in Ms. Yang's house to freeze and crack, and all the water inside flowed out, damaging the wooden floor and wooden furniture at home. After inspection by maintenance personnel, it was caused by cold air pouring into the exhaust pipe of gas water heater.
Gas water heaters are widely favored by consumers because of their instant heating and energy saving. However, because gas water heaters are generally installed on balconies and close to the outdoor, if the temperature is too low, there is a danger of freezing and cracking if no protective measures are taken. In addition to the low temperature around the gas water heater itself, the cold air injected into the exhaust pipe is also one of the important reasons for its freezing crack. Experts remind that gas water heaters should be equipped with balanced smoke exhaust pipes, as shown in the following figure:
4. Gas water heaters should be equipped with balanced smoke exhaust pipes to prevent frost cracking.
The front of this smoke exhaust pipe is sealed, and there are small holes around it to exhaust smoke. Cold air blows into the exhaust pipe, enters through the small hole on one side, and is immediately discharged through the small hole on the other side. Because the front part is sealed, cold air will not be poured into the water heater, which can effectively prevent frost cracking.
5. In addition, to prevent the gas water heater from freezing and cracking, we should also keep in mind the following two aspects:
5- 1. When the outdoor air temperature is lower than 0℃, please follow the following steps to prevent the water tank from freezing after each use:
A. close the gas valve and cut off the power supply;
B. close the water inlet valve;
C. open the hot water valve;
D turn the water temperature adjusting knob to the position of "low temperature" or "flood";
E. Remove the drain valve for drainage (when it is used again, the drain valve must be installed for normal use). Please do not turn off the power of the water heater with active anti-freezing function.
5-2. When the working environment temperature of the water heater is lower than-15℃, the gas water heater with active anti-freezing function also has the risk of water tank freezing crack. Therefore, users of water heaters with active anti-freezing function need to follow the above steps to prevent the water tank from freezing and cracking after each use.
6, gas water heater drainage method in winter
If your gas water heater fails to start, it may be "cold". In order to prevent the water heater from freezing, drainage is an important prerequisite for prevention. Do some room freezing for the gas water heater in your home.
7. First of all, let's know the function of each valve of the machine.
Figure 1: Schematic diagram of the installation effect of PPR globe valve or copper ball valve.
Figure 2: Schematic diagram of installation effect of pipeline angle valve.
Figure 3: Schematic diagram of hot water port of vegetable basin
Fig. 4: Schematic diagram of hot water port of washbasin
Fig. 5: Schematic diagram of drain rod of pressure relief valve of water heater.
8. Let's operate the water heater drainage mode.
Step 1: Close the imported PPR globe valve, the copper ball valve in Figure 1 or the imported angle valve in Figure 2, and close the natural gas valve.
Step 2: Turn on the hot water faucet in the sink or washbasin.
Step 3: Rotate counterclockwise to loosen the drain rod of the pressure relief valve shown in Figure 5.
Step 4: After the hot water faucet in the vegetable basin or washbasin stops running, close the hot water outlet PPR stop valve, copper ball valve or hot water outlet angle valve in Figure 1, and unscrew the drain rod of the removed pressure reducing valve clockwise.
At this point, the accumulated water in the water heater has been completely eliminated, effectively preventing the hidden danger that the water tank of the water heater is frozen and cracked due to temperature!