Problems Resulting From Negligence Of Caution Items - Daikin VRV Plus Series General Information Manual

Si33-003.book Page 186 Monday, June 25, 2001 9:06 AM

Problems Resulting from Negligence of Caution Items

11. Problems Resulting from Negligence of Caution Items

11.1 Problems Resulting from Negligence of Caution Items
Problems resulting from charging a wrong type of refrigerant
1. When R22 is charged into an air conditioner designed for a new refrigerant
2. When an R22 air conditioner is charged with a new refrigerant
3. When a mistake is made between R410A and R-407C in refrigerant charging
Do no make any of the above mistakes 1, 2 and 3, Errors 1 and 2 can damage the compressor.
1. When R22 is charged into an air conditioner designed for a new alternative refrigerant Chlorine in R22
2. When an R22 air conditioner is charged with a new refrigerant
3. When a mistake is made between R410A and R-407C in refrigerant charging
Problems resulting from using suniso (mineral oil) in air conditioners using new refrigerants
(R401C, R410A)
Suniso causes degradation of ether oil,and this causes lubricating deficiency in the compressor and
clogging in the capillary tube, thereby leading to equipment damage.
Example
186
corrodes the chiller oil. Degradation of the chiller oil deteriorates the lubricating performance of the oil.
HFCs are not compatible with mineral oil, therefore degradation of oil return performance results.
Furthermore, the refrigerant and oil separate into a two-phase state inside the compressor, and causes
a lack of oil supply to the bearing, resulting in inadequate bearing lubrication.
R410A is higher in pressure than R22. Since R22 air conditioners are not designed to withstand the
pressure of R410A, if R410A is charged into an R22 air conditioner, an extremely dangerous condition
can result.
The refrigerant composition changes. This not only causes a capacity decrease but also results in
equipment malfunction and damage in some cases.
R410A is higher in pressure than R-407C. Since R-407C air conditioners are not designed to withstand
the pressure of R410A, if R410A is charge into an R-407C air conditioner, an extremely dangerous
condition can result.
: http://splitoff.ru/tehn-doc.html
New Refrigerant R-407C
SiE33-003