Type III — Low-PressureQuestion 178 of 240
If a low-pressure chiller's high-pressure limit control trips during operation, the technician should first:
a.Bypass the control to finish the job
b.Investigate the cause before resetting
c.Raise the rupture-disk setting
d.Reset it and keep running the machine
Explanation
A tripped limit control is a warning that should be investigated, since it may signal non-condensable buildup, water intrusion, or another fault. Simply resetting or bypassing a safety control hides the real problem and is unsafe. Never alter or bypass the rupture disk or limit devices.
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