【 Weak current College 】 heating system common breakdown of

Summary: hot water heating system common breakdown of the heat sink is not hot, partial, thermal failure, the return water temperature is too high, system return water temperature is too low, the other failure and troubleshooting.

Cold winter climate in the Northeast, every year six-month winter heating period. In recent years, water heating to the technical and economic advantages are significant customers.
Current hot water heating system is widely used in industrial and civil building. However, due to construction workers in hot water heating system construction, adjustment and operation management, lack of experience, the system at run time, there may be some malfunction, affect the normal heating. After years of practice, summed up the hot water heating system common breakdown and solution for your reference.

First, local heat sink not hot
Local radiator heat causes generally have the following situation: valve, valve plate falls off in the seat in the flow channel blocked the htm, then you can open the valve cover for repairs, or replacement of the defective valve. Gas tank air too much, blocked pipeline, will also have local heatsink not hot, then open system settings of the outgassing attachments such as gas tank on exhaust, radiator, manually flying a door, etc.
Pipe plug, this is the kind of failure when sending short of water, available in the pipeline and valves before turning on its temperature, beating the touch to hear the sound; when bottled water for too long, the system is large, jams occur around the Office, on dead water touch is not easy to determine the blocking position, when available on the water's method to find the water point without intermediate heat pipeline in order to progress on both ends. On the water, such as water-water continue to put the extension description after plugging point; then take the remaining segment to put water in the Shui hot water not to continue to extend that block points the first time on the water points and second placed water points. When the blocking points out, the section on the pipe, the pipe dirt removal or replacement of the pipe.
Installation of heating system pipes slope, resulting in the unreasonable pipeline appears in its bulging, internally generated gas plug, plug or reduces the length of pipe cross sectional area of circulation, thereby causing partial not hot. You should adjust the slope of the pipe so that it meets the design requirements of the slope and slope direction.
Indoor system sent, backwater channels and outdoor hot net send, backwater mutual reversed, or all in the delivery (or back) tube, indoor system cannot form a circular loop. You should carefully look for extranet scenarios, will then correct the wrong channel.

2. thermal failure
Two-pipe heating system on fractional, multi-storey building top heatsink overtemperature, lower the heat sink cooling. The vertical misadjustment of reasons there are two possible.
First, through the lower level the heat sink of large difference between the htm flow. Exclude such fault is to put small upper radiator pipe on valve to reduce its thermal media flow.
Second, the lower the pipe pipes are scale, scale, and other plug and the circulatory system of resistance, undermine the system loop pressure loss of balance. In this case the timely removal of dirt in the pipe or replace branch risers, reduce resistance loss, recovery system loop between the pressure loss of balance.
When used in multi-layer architecture for system, lower the heat sink overheat, upper radiator is hot for the cause may be upper radiator in air, you should check the heat sink onto the valve or the valve on the pipeline, to exclude the air; also it is possible that the system lacks the water, there should be water.
In the same system has several parallel loops, sometimes there is a loop over heat, some loops do not heat horizontal imbalances, then, should adjust a total control on the loop so that loop valve, pressure losses close to balance, thus removing the loop between heat and cold are not.
Exclusive lift system end radiator not hot, close to the thermal entrance heatsink overtemperature, also belong to the standard the phenomenon of thermal offset. This phenomenon is due to the large front valve open, the function of the loop and the loop itself pressure reduces the pressure difference between the result of the imbalance; close to the main trunk line entry ports of the radiator in htm, adopted by the road is a short, small loss in pressure, the greater the pressure loop remaining htm flow would be too large and thus exceeded the actual value. Remote radiator in htm, adopted by the road is long, pressure loss, and through remote loop on fewer htm flow. You should turn down system portal-end loop-risers on the valve, open at the end of the gas tank of operable or check the automatic valve, exclude system in some air.

Third, the return water temperature too high
Hot user entry devices Department sent back to the main loop valve not closed or closed, you should check the entrance off strict circulation valve.
System heat load small circulation water, thermal, then you should adjust the total intake and return water valve, increase system resistance, thus reducing the cycle traffic.
Boiler heating capacity is too large, the consumption of heating systems for small, producing water temperature is too high, you should control the water temperature limit. When the water temperature reaches a certain value in the boiler room to take the appropriate measures, such as the closure of the drum, the method handles the fan.

IV. system return water temperature too low
Generate system return water temperature too low because generally have the following situation: the boiler heat source cannot supply enough calories so that the water temperature does not meet the design requirements. Modification or addition should then, improving boiler water temperature; circulation pump flow small or head low and slow circulation system, while the htm sent return water temperature difference, then you should use the appropriate circulation pump replacement pump. Outdoor pipe leaking serious, boiler pressure drops too fast, boiler supply water far exceeds the normal need when dealing with outdoor network check to identify leaks point timely repairs. External network heat loss, sometimes becoming the return water temperature is too low, causing excessive heat loss factor is the external network insulation quality is poor, the local thermal insulation pipe or didn't, but the poor performance of insulation materials; because of the trench cover does not close between installation, surface water flows into the pit or pit to pit within a pipeline leak memory, there is a wide range of water, and return pipe is immersionIn water, make the trench into a large heat transfer station, when should enhance outdoor pipe insulation and management work, timely exclude water ditch.
Circulating water volume is too small, you should check whether reverse pump, piping, valves, orifice, is blocked or valve did not fully open, open the valve, clearing system of dirt and sediment

V. other failure and troubleshooting
Water temperature suddenly subsides, the change is large, can cause heat sink and pipe fittings from thermal expansion or contraction of the leaking, you should take appropriate measures to enable the boiler supply water temperature remains stable.
Building height of vastly, system construction in run time pressure that the heat damage to the equipment and accessories, water should be brought to the attention of the technology sector in accordance with the requirements of the building given water pressure in some buildings heating water inlet Unit Department rushed to install surge Board, mounted regulator Board should be selected voltage plate aperture, conditional, in the lower-tier architecture to take the entrance to the installation of the system automatically pressure relief device.
With the further development of science and technology, water heating technology is constantly improving, heating facilities will continue to improve, in order to give people working and living areas and a comfortable environment to ensure that human health and promote the development of China's modernization.