Faults and solutions generated in the operation of fan coil

In actual operation, engineering, fan coil systems often will be some failures, resulting in room air conditioning load decreases, less than the design temperature requirements. Use the fan coil number, dispersed installation, maintenance and repair is not in place will seriously affect their effectiveness. Therefore, the problems and failures in the operation of fan coil produced to be able to accurately determine the cause and to be resolved quickly.

First, the fan does not turn
Reason:
(1) power;
(2) low voltage;
(3) Incorrect wiring or loose terminals;
(4) failure or poor motor capacitor;
(5) switch is defective.
Solution:
(1) identify the reasons for or wait for restoration;
(2) check Cheongju reason, restore normal voltage;
(3) with a multimeter to check wiring and repair;
(4) to repair or replace the motor, capacitor check multimeter after use;
(5) repair or replace the switch.

Second, the fan speed but no wind or less wind
Reason:
(1) power supply voltage is not normal;
(2) reverse;
(3) There was blocked outlet;
(4) wheel anti-loaded;
(5) the air filter clogging.
Solution:
(1) identify the cause and restore the voltage to normal;
(2) changing the wiring or replace the motor;
(3) the removal of obstacles;
(4) the impeller being installed;
(5) Cheongju wash the air filter.

 Supply water chilled 4-way cassette fan coil units

Third, bad cold (hot) wind effect
Reason:
(1) valve opening is not enough;
(2) coil blockage;
(3) coils inside the air;
(4) power supply voltage falls;
(5) A clogged air filter;
(6) for (cold, hot) water shortage or abnormal temperature;
(7) Fan reversal;
(8) delivery, return air obstacles;
(9) airflow short circuit or uneven distribution of indoor air, improper equipment selection;
(10) temperature adjustment inappropriate.
Solution:
(1) Re-adjust the valve opening;
(2) Cheongju sweep discharge tube;
(3) the discharge of air from the bleed valve;
(4) identify the reasons for recovery voltage;
(5) Cheongju washed filters;
(6) regulating the water supply valve, check water temperature, adjust the cold (hot) source;
(7) the removal of obstacles to re-wiring;
(8) the removal of obstacles and adjust the air;
(9) To re-elect fan coil;
(10) to adjust the air quality.

Fourth, there are fan coil vibration and noise
Reason:
(1) fan coil poor installation;
(2) fan coil housing poor installation;
(3) fixing the fan loose parts;
(4) Duct on a foreign body;
(5) the fan motor is faulty;
(6) fan blades damaged;
(7) Outlet grille louvers loose
(8) Fan coil within air
(9) chilled water (hot water) flow rate is too high;
(10) into the water mixed with a large amount of air (air into the water system to form water hammer).
Solution:
(1) in accordance with the relevant standards and specifications, re-installation and adjustment of fan coil;
(2) Re-install the fan coil housing;
(3) identify the reasons for the fastening and adjustment of loose parts;
(4) removal of foreign matter on the way the wind;
(5) Repair or replacement of the motor;
(6) replace the fan impeller;
(7)Tightening or adjusting blinds fan outlet;
(8) to exclude the air within the heat exchanger fan coil;
(9) Check the water flow rate, and will adjust the normal water flow rate;
(10) Remove air in water

Fifth, leaking
Reason:
(1) poor precision air conditioning installation, drain pan tilt;
(2) leaking pipes;
(3) tube and condensate water dripping.
Solution:
(1) adjusted as required;
(2) replacement of water pipes;
(3) condensate water pipe should be re-insulation.

Sixth, the outer casing surface condensation
Reason:
(1) inside the enclosure damaged insulation;
(2) the housing when assembled in contact with the flame, the insulation has been burnt;
(3) fan coil casing seams have cold air leakage;
(4) indoor dew point temperature is too high.
Solution:
(1) repair the insulation inside the cabinet;
(2) the installation, do not make direct contact with the flame chassis repair, insulation will burn re-wrap;
(3) the leakage at the housing repaired;
(4) on the indoor dehumidified.

Seven, the outlet of a foreign body blow
Reason:
(1) due to corrosion caused by the fan blade surface corrosion products;
(2) air filter damaged, deteriorated;
(3) housing insulation material damage, deterioration;
(4) Too much dust in the fan coil.
Solution:
(1) replace the fan;
(2) Replace the air filter;
(3) the replacement of insulation material;
(4) cleaning dust inside the fan coil .

Bright Best air conditioning is a chinese private group of companies established in 2012 and specialised in heating and air conditioning parts.

Our workers have years of production experience in fan coil unit,industrial valve,air curtain,air conditioning thermostat,corrugated stainless steel tubing.Mr Ding, our technical manager has eight years of experience in the field of air conditioning and refrigeration.

Brightbest is provided with quality certification according to ISO9001:2000 , SO14001:2004 ,CE and is strongly committed to customer satisfaction.

We guarantee each product through rigorous testing.Our goal is to provide quality products on a timely basis. We pride ourselves on our ability to offer technical knowledge and advice to our customers as well as product of the highest quality.

Our products have been exported to UK, France, Italy, Middle East, Australia,and Africa etc.OEM and minimum orders will be welcome.

How to solve the problem of water seepage ceiling fan coil air conditioning ？

Seepage ceiling fan coil air conditioning system fan coil air-conditioning system is the most the most common problems in summer. Ceiling seepage only affects the appearance, serious also affect the normal use of the room and increase maintenance costs. There are many reasons for seepage produce, here are some common phenomenon.

1.An insulation layer disposed failed

Chilled water fan coil system is supplied from the chiller, the water temperature is usually only about l0 ℃, so the unit's water supply pipe, return pipe, condenser and condensate drain pan temperature are lower than the dew point temperature of the room, it is easy to appear in the summer knot Lucy, it is necessary to insulate the pipe. When installing insulation requirements between the wall and not leave gaps, but also to the materials requirements are also higher. The actual project, by itself or due to insulation material of construction, thermal insulation materials failed to close on a wall or pipe, so that there is a certain gap between the insulation material and the tube wall, when the air enters the gap with cryo tubes wall contact, they produce condensate, condensate water piled up, it will have ceiling seepage. Such as the use of glass wool insulation shell in some irregular pipe at the insulation and pipe fittings difficult to close after the pipe surface is easy to produce condensate water suction pipe and casing, the entire glass wool shell absorb enough water condensation water will seep the soaked ceiling. The project is also due to the condensate water without making the insulation, thereby forming a secondary condensate in condensate water, wet ceiling.

Now, with economic development, water, air-conditioning systems in many buildings are beginning to use rubber insulation materials. Such material is material structure, thermal conductivity, surface heat transfer coefficient, have a resistance to water vapor permeability coefficient of great advantage in terms of construction is more than glass wool, especially for irregularly shaped pipe fittings and valves insulation , due to reduced construction causes condensation dripping

exposed type ultra thin fan coil unit

2. condensate water pipeline does not have a slope or incline setting does not meet the requirements of many developers now use for their own interests to reduce storey building way to reduce costs, resulting in generally low-storey building, reducing the space inside the ceiling, this air conditioning system duct, pipe arrangement is extremely unfavorable, especially condensate water pipeline. Condensate is discharged by the condenser fan coil slope to achieve, and often focus on emissions, if the space on the ceiling does not meet the requirements of the condensate water pipe slope, it will cause no slope or even anti-slope enable drip tray the water did not break out, resulting in the overflow after the expiration, causing the ceiling water seepage.

In addition, if the PVC hose as a condenser, in a long line due insufficient stiffness can not guarantee the drainage slope. In response to this phenomenon, in the design and construction, the specification must be strictly enforced to ensure that there is sufficient slope fan coil condenser. In the selection of the material can be taken in place of the vinyl chloride galvanized steel hose connected to the condensate water in part of the bellows. When the story is too low can not meet the grade requirements, you can take the condensate drain pipe from centralized to decentralized way drainage patterns, the condensate water drains connected to each room

Domestic water drains between.

3 condensate water piping diameter is too small

Fan coil air-conditioning system of the condensate system is a non-pressure system, so the size of the diameter of the condenser condensate will directly affect emissions. If the condenser tube diameter is too small, it will lead to increased resistance along the condensed water discharge failure, caused the leakage phenomenon. So in the design process must condenser fan coil diameter between the load (and the room load) to determine the correspondence between the condenser and diameter according to the design manual, but also construction units must strictly follow the construction plans to purchase materials and construction.

4 condensate water drain blockage summer air-conditioning fan coil room mostly wet condition work coil surface is often covered with dust, if not timely cleaning maintenance personnel, will make the dust or fibrous materials are some small condensate washed down, deposited condensate pan, and humid environments condensate pan will cause bacteria to produce a gum dirt, thus clogging the drain caused by condensate spills. You can now take the form of condensate water once stretch forming, the use of condensing water outlet groove formed in the molding process to ensure the smooth flow of condensed water discharge, and should be checked regularly for fan coil cleaning.

5 Other

(1) fan coil air conditioning system design, the new system uses wind does not undertake indoor moisture load or load new rheumatoid coil borne by the way, and in the design of the condensate water pipe did not consider this case, the choice of condensate water pipeline too small, resulting in condensate spills.

(2) Some designers when making design load, in order to secure a large selection of well-off factor, which would cause the temperature of the air-conditioned room temperature is lower than the design, supply and return water temperature of the coil is reduced, increased condensate produced, and condensate water pipe in accordance with standard design cause condensate spills.

Poor quality

(3) pipe valves and other equipment, leak itself. To solve the above problem, each design and construction personnel must strictly comply with national standards and norms, the choice of high-quality equipment and materials to solve the problem of water seepage from the ceiling at all.

 Bright Best air conditioning is a chinese private group of companies established in 2012 and specialised in heating and air conditioning parts.

Our workers have years of production experience in fan coil unit,industrial valve,air curtain,air conditioning thermostat,corrugated stainless steel tubing.Mr Ding, our technical manager has eight years of experience in the field of air conditioning and refrigeration.

Brightbest is provided with quality certification according to ISO9001:2000 , SO14001:2004 ,CE and is strongly committed to customer satisfaction.

We guarantee each product through rigorous testing.Our goal is to provide quality products on a timely basis. We pride ourselves on our ability to offer technical knowledge and advice to our customers as well as product of the highest quality.

Our products have been exported to UK, France, Italy, Middle East, Australia,and Africa etc.OEM and minimum orders will be welcome.

Fan coil noise reduction measures

Fan coil air conditioning noise reduction measures are designers, hotel managers and accommodation problems are very concerned about guests. Therefore, we must from the design stage to strive to reduce noise.

Room air conditioning system caused by noise pollution has three aspects: the fresh air system, exhaust system and fan coil system. The first two can be reduced through the installation of mufflers and noise damping measures, except direct result of fan coil fitted in all parts of the room must be in accordance with the different forms and installation location, take some special measures in order to reduce its muffler noise.

4-way cassette fan coil unit(K-style)

Noise reduction measures are:
(1) selection of a low-noise fan coil, the first prototype of the selected noise measured response, and the difference is expected to be the prototype and mass production, usually 5DB (A).

(2) allowed by room noise standards, a reasonable choice of fan coil configurations:

1) requirements for in-room noise is not greater than 30DB (A) and a 20 Nc noise evaluation curve: If conditions permit, fan coil can be disposed in the conduit between and within the room fan outlet to outlet piping as pretty sonication.

2) the requirements for in-room noise is not greater than 35dB (A) and a 25 Nc time: an upper horizontal fan coil should be installed on the ceiling of the hall of the rooms can be set up in front of the outlet plus flail. 700 long pipe muffler to reduce sound night about 6dB (A) * about the school legislation fan coil should be installed away from the bed and desk area, and in the upper part (the outlet) plus set up a "Room" type muffler.

3) requirements for in-room noise is not greater than 40dB and a NC 30: Waste selection medium noise level of horizontal, vertical or school-type fan coil cabinet open at night during sleep low block to reduce noise levels. Water fan coil system and operation method of adjusting water fan coil system design, fan coil operation, should be immediately removed water pipeline system gas, to ensure that the system is not water, should be regularly cleaned return air filter set net dust. Note that the fan coil drain pan drain is not clogged debris, pay attention to the smooth discharge of condensate water.

Bright Best air conditioning is a chinese private group of companies established in 2012 and specialised in heating and air conditioning parts.Brightbest own the wide products include fan coil unit,valve( ball valve, brass ball valve,check valve,angle valve,air vent valve,stop valve,strainer valve),air conditioning stainess steel corrugated tube ,air conditioning thermostat and air curtains.

Brightbest is provided with quality certification according to ISO9001:2000 , SO14001:2004 ,CE and is strongly committed to customer satisfaction.

Our goal is to provide quality products on a timely basis. We pride ourselves on our ability to offer technical knowledge and advice to our customers as well as product of the highest quality.

Our products have been exported to UK, France, Italy, Middle East, Australia,and Africa etc. Our development vision will keep on persisting in principle of practicability, pioneer and innovation, and research & develop more efficient, energy-saving, eco-friendly and safer products to make great contribution to Chinese & worldwide energy saving and emission reduction.