Heating is not more complicated, not can be summed up by several or dozens of causes, there are at least as many as hundreds of factors, In accordance with the theory and practice experience, according to the heat source, heating network, building systems, four heat users, the list of 100 factors summarized as follows: First, the heat source: (a total of 28 factors) replenishment factors: 1, the constant pressure point low: water supply pump set low pressure point is not hot, tall buildings. 2, the water supply pump failure: water supply pump problems, no spare pump system is a serious water deficit. 3, inverter failure: water supply pump inverter failure, replenishment is not timely. 4, the expansion of the water tank: due to the replenishment signal failure caused expansion tank water deficit. 5, fill the water tank is small: a severe water deficit and fill the water tank capacity can not supply water needs. 6, without water: accident caused some of the other cities with a shortage this situation may also occur, prevent replenishment. Cycle factors: 1, the circulating pump failure: circulating pump problems, no spare pump system is not circulating. The intermittent cycle: In order to save power, heating management units often stop the pump system unstable conditions. 3, small circulation pump flow: large area causing the user is not hot. 4, the circulation pump head: caused by the end user is not hot. Boiler factors: 1, boiler capacity: the existing boiler heat supply can not meet the actual needs of users. 2, the low efficiency of the boiler: boiler capacity seems to meet the need, but because of unburned fuel, boiler exhaust gas temperature, boiler the waterway fouling serious, the boiler surface heat dissipation causes the boiler efficiency is low, resulting in heating is not cold stage. 3 shutdown: boiler failure, no spare furnace being Overhaul. 4, the fuel failed: the use of poor quality fuel, the fuel low calorific value, even difficult to Kai furnace or flameout often. Fuel with less: part of the heating management units blindly pursuing their own economic interests, at the expense of the interests of the heat users, using the minimum amount of fuel does not meet the user requirements, is not up to the level of heating. Heat exchangers factors: heat exchanger selection: When the secondary heat exchanger is needed thermal station, the existing heat exchange and can not meet the user needs. Heat exchanger fouling: failed or fallen into disrepair demineralized water, the heat exchanger in the thermal station once serious fouling water or secondary water, which greatly influence the effect of heat transfer due to the boiler room or a thermal station. 3, damage to the heat exchanger: the failure of the heat exchanger such as a secondary water string of water in the thermal station. 4, the excessive bypass flow: a large proportion of mixing water supply and return water bypass pipe, causing heat source outlet water temperature is too low, resulting in heating mistakes. 5, mixing pump: mixing pump heat exchanger, the the troubled waters proportion unreasonable, also caused by the heat source outlet water temperature is too low, resulting in heating mistakes. Management factors: 1, non-professional fireman: the heating management units fireman undocumented posts, which is universal in some areas, and even these units is also blind to take over the layman. 2 and disorderly management: management mechanism is missing part of the heating run units, employees lack the sense of responsibility, but not the boiler and heat exchanger habits and procedures. Not accurate according to meteorological adjustment: heating midterm different stages and at all stages of each day, the outdoor temperature and weather constantly changes, the heating management unit regulation is outdated cause heat mistakes. Intermittent heating: Many heating management units with intermittent heating mode when the accurate calculation time reasonable control, management in place according to the temperature conditions may appear normal room temperature the heating temporarily not heat the phenomenon, which is reasonable. 5, poor management of intermittent heating: some heating management unit intermittent heating, technology and management is not in place, the heating is not working and the room temperature is not a normal phenomenon often occurs, which is unreasonable. Other factors: 1, blackout: water supply pump, circulation pump can not start. 2, unstable voltage: when the voltage is low, the current is easy to exceed the rated value must temporarily stop the pump, which may cause unstable system conditions. Decontamination dirty block: cause total system resistance is increased, resulting in the end user is not hot. Heating network: balancing factor (a total of 26 factors): 1, hydraulic imbalance: This is the most common phenomenon in the system, almost all heating units neither solve, so often caused by the end user is not hot and overheating of the front-end user . 2, a pipe network imbalance: large municipal needs more serious tone network for the backwater level pressure difference, even down pressure differential thermal station is not hot phenomenon occurs, thereby damaging it for the user. 3, alternate heat source: some thermal stations or heat users by multiple heat source networking heating, such as municipal down conditions will cause temporary thermal phenomena. 4, branch valve opening: adjust the distance a balance throughout the pipe network, it is necessary to limit in the near-end user flow and differential pressure, and sometimes control the branch or user valve opening becomes too small, also resulting in proximal not hot. 5, a large gap between the various branches resistance: two adjacent branch or two buildings of the internal resistance of each system is completely different, the gap between the bigger and more difficult to tune both balanced. 6, the end user resistance: the end user resistance to the General Assembly so that the whole system resistance significantly increased, Beijing St. Lawrence radiator top ten brands Inquiries Contact: Taoze Feng Tel :010-87598438 QQ: 860357491 steel radiator: http:// nuanqipian1.zk71.com / radiator: http://www.sllssrq.com/ heating does not heat: http://www.nuanqi.cc/?article-54.html 1201 Crystal Square Huatang Mall, Daxing District, Beijing