1 buffer heat storage water tank in air source heat pump heating system installation and debugging method and the main point

by:AIRWOLF     2020-06-16
Frost symptom

frost reason

instant solutions

1, the ice at the bottom of the

water flow, spread the freezing evaporator

de-icing, clean up dirt, outlet flow.

2, evaporator local ice

frost sensor place frost-free, frost point incorrect

manual force defrost, moving to ice/frost frost sensor

3, evaporator full of frost/ice, no frost

1 frost sensor, temperature sensor failure

manual force defrost, resistance drift, replace the sensor

2 or lack of fluorine system blocking

add fluoride, according to the standard welding down wall.

3 frost, four-way reversing valve commutation; By tonghua frost system electromagnetic valve is not action

1, valve parts whether need to report

2, valve is normal action

4, frost is not clean, not completely

1, exit the frost coil temperature is set too low, lead to frost haven't clean, withdrew from frost.

2, frost coil sensor placement is not appropriate, not placed in frost is the most serious place.

1, adjust the parameters of frost, the temperature of exit frost, observation can thoroughly frost shall prevail.

2, adjust the frost probe location, placed in frost is the most serious place.

5, short time frequent frost

1, the fin heat exchanger dirty plugging or foreign bodies blocked.

1, clean the heat exchanger or removal.

2, damage to the fan motor, or too little fan air volume configuration

2, maintenance and replacement of motor or replace a bigger fan unit.

3 small, filled volume of the refrigerant.

3, add refrigerant to the appropriate pressure.

4, throttling expansion valve opening is too small.

4, large expansion valve opening.

5, finned heat exchanger area is too small.

5, demand change finned heat exchanger, increase the area.

6, frost is very serious, fin all covered with thick frost layer

1, enter the frost coil temperature is set too low, or the defrosting time interval is too long, lead to not enter the frost action in time.

2, frost coil sensor placement is not appropriate, not placed in frost is the most serious place.

1, adjust the parameters of frost, will enter the defrosting temperature is high, the interval time, observed in a timely manner into the frost action shall prevail.

2, adjust the frost probe location, placed in frost is the most serious place.

7, uneven frost, local thick frost, local not frosted

1, the refrigerant distribution uneven, part of the pipeline flow is big, some small pipe flow.

2, structural design is unreasonable, such as fin heat exchanger and height is too high, lead to head up and down wind speed difference is too big.

1, the demand for refrigerant distributor structure adjustment, make traffic match the evaporation capacity.

2, demand for heat exchanger height can't be too high, or increase the fan air volume.

8, frost process in low voltage protection

1, frost process of low pressure tests do not delay or delay time is too short.

2, blocking or throttling expansion valve is reversed his mouth is too small.

1, low voltage protection during frost delay treatment or prolonged delay needs to be done.

2, replace expansion valve or big expansion valve opening.

9, frost process in high voltage protection

exit frost coil temperature is set too high, lead to high pressure protection is still not out of frost.

adjustment parameters of frost, will withdraw from frost temperature down, observation can thoroughly frost shall prevail.

10, fin no frost also have frost action

enter frost coil temperature ( Or temperature difference) Set too high, lead to misoperation.

adjust frost parameters, will enter the frost temperature ( Or temperature difference) Large, observe fin frost to appropriate levels in frost.

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