Maintenance
Technical Catalogue
11
75
TCGB0051 rev 0 - 09/2009
11.12. Normal operating pressure
Check to ensure that Chiller is operating within the working range as shown below, after at least 15 minutes
operation.
Low Pressure: The normal operating low pressure of the water chiller is indicated in the gure below; lower
than 0.3 MPa indicates an abnormal condition.
Discharge Pressure: low than 0.9 MPa or higher than 2.2 MPa indicates an abnormal condition
CAUTION:
− Periodical Maintenance
Perform periodical maintenance according to the “INSTRUCTIONS“ to maintain the unit in a good condition.
− Fire
If a re accidentally occurs, turn OFF the main switch and use an extinguisher for an oil re and electric re.
− Flammable Gases
Do not operate the unit near the ammable gases such as lacquer, paint, oil, etc. to avoid a re or an explosion.
− Service Panels and Electrical Box Cover
Turn OFF the main switch when service panels or electrical box covers are removed for setting the temperature.
Do not operate the unit without xing panels.
− Heated Pipe
Do not touch the parts at discharge gas side by hand, since the pipes at the discharge side are heated by
refrigerant and temperature becomes higher than 100 °C.
− Use
Do not utilize this unit for cooling of drinking water or food. Comply with local codes and regulations.
− Failure
Turn OFF all the main switches if refrigerant leakage or chilled water leakage occurs. Also, if the unit can not be
stopped by the control switch, turn OFF all the switches for power source.
− Activation of Safety Device
In the case that one of safety devices is activated and unit is stopped, remove the cause of the stoppage and
restart the unit. The protection devices are utilized to protect the unit from an abnormal operation.
Therefore, if one of safety devices is activated, remove the cause by referring the “Troubleshooting“ in the
“INSTRUCTION“ or call the local agency.
− Fuse
Utilize a fuse with specied capacity. Do not use a steel wire or a copper wire instead of a fuse. If an incorrect wire
is utilized, a serious accident such as a re will occur.
− Safety Devices
Do not make a short-circuit at the protection line. If a short-circuit is made, a serious accident will occur.
− Setting of Safety devices
Do not change the setting of safety devices, if changed, a serious accident will occur.
Do not touch any electrical parts except for the operation switches during the operation.
Do not press the button on the magnetic switch. If pressed, a serious accident will occur.
Suction Gas
Pressure (MPa)
Chilled Water Outlet Temperature (ºC)
Standard Working Range
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