Nine Reasons and Solutions for Sudden Cooling and Heating of Hot Water in Karoli Gas Wall Mounted Boiler

Zhongshan Kaloli Thermal Energy Technology Co., Ltd. (hereinafter referred to as Kaloli), established on May 1, 2004, is located in the economically developed the Pearl River Delta and is specialized in the design and manufacturing of gas wall hung furnace products. After 10 years of development, the company is at the forefront of the industry in terms of product safety and quality, as well as product technological innovation. It has fully passed the ISO9001:2000 quality system certification and obtained the EU CE certification.
Currently, there are more and more users using household Karoli gas wall mounted heaters for independent heating, but there are also more and more problems, such as misfire, pressure drop, water leakage, etc. What are the causes of these failures? How should we solve it?
As the core of winter heating, wall mounted stoves can not only provide heating but also provide domestic water. After the heating season ends, wall mounted stoves will not have "half a year of leisure". You can switch to summer mode to use hot water. However, when using hot water from a wall mounted stove, it can cause sudden changes in temperature, which seriously affects the comfort of bathing. It is not only easy to catch a cold, but also can cause burns. What is the reason for this? How to solve it?
What to do with problems such as sudden cooling and heating of hot water in Karoli gas wall mounted boiler
1、 Domestic hot water is sometimes cold or hot, and the wall mounted furnace fire is sometimes large or small
Reason 1: Users adjust the mixing tap when using domestic hot water. When the flow of cold water is too large, the flow of hot water through the Karoli gas wall mounted furnace is too small. At this time, the furnace will automatically adjust. If the situation is serious, it may cause the wall mounted furnace to shut down, causing the hot water to cool and heat up, and the flame to rise and fall.
How to solve this problem: When using domestic hot water, it is best to adjust the temperature control knob on the Karoli gas wall mounted stove to a suitable temperature. Do not mix too much water with the mixing tap, so that the stove will always be in a stable working state and the hot water temperature will be very stable.
Reason 2: The water pressure in the water supply pipeline is unstable. Currently, the residential areas are very dense or high-rise, and the water consumption is large due to the large number of people, especially in the morning and evening peak periods and summer. This can easily cause frequent fluctuations in the water pressure in the water supply pipeline. When the water pressure fluctuates greatly, the water flow will change. To maintain a constant temperature wall mounted furnace, it is necessary to frequently adjust the output power to meet the constant temperature requirements. However, there is a time difference in actions such as detection, logical calculation, and adjustment of output power, during which cold water flows to the faucet.
How to solve: The water heater is suddenly hot and cold, usually due to water pressure problems. Find the property management office to adjust the water pressure, causing the water temperature of the water heater to be not hot enough or hot and cold. If the amount of water in the shower does not significantly decrease, it may not be a water pressure problem; For this situation, a pressure stabilizing valve can be installed in the water inlet pipe of the wall mounted boiler to stabilize the water pressure or a flow limiting valve can be installed to limit the flow of water.
Cause 3: The domestic hot water plate has too much water scaling, resulting in hot and cold water.
How to solve this problem: Find after-sales personnel from the manufacturer to carry out professional descaling and cleaning work.
Cause 4: The pressure of tap water in the community is unstable, causing the instantaneous flow rate through the wall mounted furnace plate to fluctuate, and the domestic hot water coming out is sometimes cold or hot.
How to solve this problem: If conditions permit, install a domestic tap water booster pump (pressure stabilizing function).
Cause 5: The pressure of the gas pipeline is unstable, and the normal working pressure of the wall mounted furnace is 20 mbar, with a fluctuation range of 15 mbar to 25 mbar. Unable to work normally beyond the specified range; If it fluctuates frequently within the allowable range, the pressure, flow rate, and output power will fluctuate, resulting in intermittent cooling and heating of sanitary hot water.
How to solve this problem: You can eliminate the impact by adding a gas pressure stabilizing valve.
Reason 6: If the distance between the domestic hot water outlet and the wall mounted furnace is relatively long, such as when installed on a balcony, the time from the start of operation of the wall mounted furnace to a constant temperature is relatively long. After turning off the machine, restart the machine. The starting section of water is hot water, with a section of cold water in the middle, and then hot water, which can give the illusion of sudden heat and cold.
How to solve this problem: If the distance between the domestic hot water outlet and the wall mounted boiler is relatively long, the following solution can be adopted: Install a water return system for the wall mounted boiler. The main components of the water return system are a water return pump and a temperature control system. When the water temperature in the outlet pipe of the wall mounted boiler is lower than the set return water temperature, the return water pump will start. The return water pump does not stop working until the outlet water temperature of the wall mounted boiler is greater than the set return water temperature, and hot water is available for users.
Reason 7: The distance between the domestic hot water outlet and the wall mounted stove is relatively long. Some families will install the wall mounted stove on the balcony. The wall mounted stove will take a long time to start working to a constant temperature. When the device is turned off and turned on, it will appear that the start is hot water, and a period of cold water will be discharged in the middle before the hot water is discharged, which will give the illusion of being hot and cold.
How to solve this problem: If the water outlet is far away from the wall mounted boiler, such as installed on the balcony, it is necessary to confirm whether the cold water of the water heater is turned on to the maximum? This is crucial because the tap water is not turned to its maximum, and once the water temperature is adjusted at the outlet, the water heater will shut down for protection due to insufficient flow and high temperature;
Cause 8: The proportional adjustment curve of the proportional valve deviates from the linear value of the controller for proportional adjustment of the current proportional valve. The signal source generated by the Hall element of the water flow sensor deviates from the original linear curve due to the idling and slipping of the impeller, resulting in an error code signal from the main controller.
How to solve this problem: the proportional characteristic curve of the gas proportional valve should not deviate from the current curve output to the proportional valve by the electronic control; The domestic hot water outlet temperature controller is built-in and requires a reaction speed of less than 2s.
Cause 9: The gas pressure fluctuates greatly, and the pressure stabilizing function of the proportional valve fails. During the construction of a wall mounted furnace, water may enter the gas intake pipe due to carelessness by workers. If the connection of the gas intake pipe is U-shaped, when the wall mounted furnace is started, the gas flow will push the water in the gas pipe towards the wall mounted furnace. When the water reaches a certain height, the gravity of the water is greater than the thrust of the gas, and the water will flow back, forming a reaction that prevents the gas from entering the wall mounted furnace.
When the reaction force of water is less than the thrust of gas, the gas will push the water towards the wall mounted furnace, and the water will fluctuate back and forth in the U-shaped pipe, causing continuous fluctuations in the gas pressure, making the combustion flame unstable, and domestic hot water hot and cold.