When heating hot water from a wall-mounted or gas-fired water heater, hot water may occasionally encounter the following phenomena: 1. Hot water overheating.
Many in summer, rare in winter
The main reason is that the gas pressure is too high, or the water volume is too small, or too low pressure, or the effluent temperature is set too high, or water inlet temperature is too high or the waterway connection error and other internal and external factors.
The best solution: Buy a wall-mounted furnace with a minimum output power of less than 9.62kw, which can effectively reduce the cause of overheating.
Other remedial measures:
For the gas pressure is too high, will wall-mounted furnace bottom gas pipe angle valve shut down, or increase gas regulator valve, if necessary, contact gas company;
For water inlet temperature is too high, then increase water pressure booster pump, or tap water inlet angle valve to achieve maximum, or appropriate to improve the temperature of hydrothermal effluent;
For the water flow is too small, if it is a new machine, should first be excluded from the waterway layout error or wrong shrink path or all kinds of filter network congestion, used equipment, cleaning hot water outlet of the interception of quicksand or cleaning all kinds of filter network;
For long-term pressure is too low, contact the water company or increase booster pump;
For the wrong setting of the effluent temperature, the hot water outlet temperature is set to 45 ℃, not less than 45℃. 2. Hot water is not hot.
The main occurrence in winter, summer special environment or area or customers will have but very little.
The main reason is that the rated power of wall-mounted furnace is too small to cause ' small horse cart ', or gas pressure is too low, or the water inlet temperature is too low, or the flow is too large, or equipment knot scale seriously.
The best solution: the purchase of rated power 24kw above the wall-mounted furnace, can be effectively reduced from the root causes of this heat.
Other remedial measures: For the ' small horse cart ' problem, the best way is to choose more than 24kw wall-mounted furnace (more than 150 square meters users also need to consider heating needs), or increase the current limit ring. If you want to pay attention to energy-saving heating, then buy more than 24kw of heating and hot water power separate set of wall-mounted furnace.
(Principle: According to national water supply and drainage related norms, wall-mounted furnace rated output power can not be less than 22.6kw (input about 24kw), generally below this power, will appear ' small horse cart ' caused by hot water is not hot. Equipment Factory or installation personnel to take other technical means except.
For gas pressure is too low, need to detect gas pressure, such as low pressure, with a regulator valve, such as gas pipe angle valve open small, open large angle valve;
For water inlet temperature is too low, then buy more than 24kw wall-mounted furnace, or increase the current limit ring, but will sacrifice hot water comfort;
For the water flow is too large, then in the tap water inlet to increase the current limit ring, or close small tap water inlet corner valve opening, or the use of conventional hot and cold water mixed water mode;
For the equipment serious scale, then by professionals to scale. 3. Hot and cold water.
Winter and summer will appear, the impact factors are more. The main reason is that the gas pressure instability, or bathing habits, or heat exchanger knot scale, or into wall-hung furnace water frequent changes caused, such as: with hot water, other people also suddenly use other hot water faucet, or community tap water pressure change frequently.
(principle: Wall-hung furnace to provide hot water is based on hot water heat load and real-time adjustment of output power, when the flow of water from large to small or small to large, wall-mounted furnaces to lag a few seconds to adjust the corresponding power, and these seconds, the water has been flowing, and therefore the formation of hot and cold
The best solution: Buy the wall-mounted stove with flow control three-way valve, which can reduce the cause of the hot and cold.
Other remedial measures:
For gas pressure instability, increase the regulator valve, or contact the gas company;
In view of the large water pressure fluctuation in the district, the pressure regulator is increased;
When using hot water, other people use other faucets, while using hot water, do not let others use other water points;
For the heat exchanger knot scale, the professionals to clean up the scale.
For bathing habits, you should not turn off the hot faucet or change the proportion of the mixed water during the whole bath; 4. There is a section of hot water cold water (wall-mounted furnace frequently start downtime).
It is more frequent in summer than in winter in summer.
The main reason for the purchase of the wall-mounted furnace when the minimum load output power is too high, due to high water temperature in summer and frequent trigger to reach the effluent temperature and downtime, or the temperature setting of hot waters is too low, or heat exchanger scaling serious and frequent trigger boiler shutdown.
The best solution: buy wall-mounted furnaces with minimum output power below 9.62kw, which can effectively reduce the above causes.
Other remedial measures:
The minimum output power of wall-mounted furnace is too high, then the gas angle valve opening at the bottom of wall-mounted furnace can be reduced.
For hot water outlet temperature set too low, then the hot water effluent temperature set to 45 ℃ (consistent with the State regulation), absolutely not less than 40 ℃;
For the heat exchanger scaling serious and frequently trigger the boiler downtime, the professional cleaning scale.
It can be seen in summary:
Many problems must be purchased when the equipment, from the root to solve, or later only remedial measures, but will sacrifice some of the hot water comfort. The most complete wall-hung furnace (water heater) sanitary hot water Problems and solutions
