ENGLISH
112
- Daily inspection of Condensers
* If the outlet temperature of the cooling water is below 21°C, condensing pressure would be decreased, which will
lead to a lack of differential pressure at the motor cooling and the oil cooler and finally become the situation of insuffi-
cient of cooling water.
The main cause of worsening the heat exchange can be seen for the scale attached inside cooling pipe and insuffi-
cient cooling water amount.
Figure 88. Condenser daily inspection standard
Classification
Inspection items
Inspection method
Criteria
Condenser
Cooling water
Inlet
Check at the Panel
Below 34 °C
Outlet
Check at the Panel
21°C or more
Condensing pressure state
Check at the Panel
5~10 kg/cm
2
Heat exchanging state
Temperature difference between
condensing temp. and cooling
water outlet temp.
Temperature difference between
condensing temp. and cooling
water outlet temp.
- Evaporator daily inspection standards
When evaporation pressure is decreased, the evaporator tube freezes and eventually damaged, or compressor surge
would also be possible. Causes of the decreased evaporating pressure would be insufficient refrigerant quantity, low
temperature water and abnormal heat exchanging efficiency. Like the condenser tubes, if foreign substances are in
or the scales adhered, corrosion may occur which will lead to a in efficient heat exchanging. This happens to de-
crease the refrigeration ability or may be the cause for surge.
Figure 89. Evaporator daily inspection standard
Classification
Inspection items
Inspection method
Criteria
Evaporator
Chilled water
Inlet
Check at the Panel
Below 5~15°C
Outlet
Check at the Panel
Above 3°C
Above 3°C
Check at the Panel
5~10 kg/cm
2
Heat exchanger condition
Temperature Difference between
the evaporation temp. and the
chilled water outlet temp.
0.5~3°C
Refrigerant charging amount
Check through the sight glass
Refrigerant condition
Check through the sight glass