GEA Grasso - Page 66

Grasso
Refri
g
eration Division
GRASSO SYSTEM CONTROL
Chap. 2 - 30 638660E_chapter2.doc 01.2004/1
2.7.2.18 Low and high oil temperature alarm
Both low and high oil temperature are monitored. In case the oil temperature becomes too low an alarm is
generated, because the viscosity becomes too high at low oil temperatures and good lubrication cannot be
ensured. Also in case of too high oil temperature an alarm is generated.
The low oil temperature alarm function is illustrated in the following diagram.
T
oil
Oil temperature
A.. Time characteristic of the oil
temperature
W.. Warning limit
Al.. Alarm limit
ML W.. Warning active
ML A.. Alarm active
3.. Reset of the active alarm
Figure 2.34, Low oil temperature alarm
Oil temp 
Toil low alarm 
Low warning + 
Oil temp: Actual oil temperature in °C
Toil low alarm: Alarm limit for low oil temperature in °C
Low warning: Enter the warning value as an offset to the alarm limit in K
<< Limit values 01 >>
The high oil temperature alarm function is illustrated in the following diagram.
T
oil
Oil temperature
A.. Time characteristic of oil
temperature
W.. Warning limit
Al.. Alarm limit
ML W.. Warning active
ML A.. Alarm active
3.. Reset of the active alarm
Figure 2.35, high oil temperature alarm
Oil temp 
Toil hi alarm 
High warning - 
Oil temp: Actual oil temperature in °C
Toil hi alarm: Alarm limit for high oil temperature in °C
High warning: Enter the warning value as an offset to the alarm limit in K
<< Limit values 01 >>