Manualshelf

Operating Instructions

ManualsBrandsSiemens ManualsRoom controlsRoom Condition Monitor, RPM series
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Applications
Siemens Building Technologies, Inc. 15
Warning Operation
The Fume Hood Controller announces warning conditions at the ODP. The ODP indicates a
warning condition by illuminating the yellow LED.
If the fume hood is operating in the face velocity mode and the face velocity exceeds the high
or low warning limit for a period greater than the delay timer a warning condition occurs.
If the fume hood is operating in the minimum flow mode and the exhaust volume exceeds the
high or low warning limit for a period greater than the delay timer a warning condition occurs.
For more information on ODP messages, see the Fume Hood Controller Operator Display
Panel User's Card (125-1976).
Alarm Operation
The Fume Hood Controller announces alarm conditions at the ODP. The ODP indicates an
alarm condition in the following three ways:
The red LED illuminates.
The horn sounds.
A text message indicating the specific alarm condition displays.
If the fume hood is operating in the face velocity mode and the face velocity exceeds the high
or low alarm limit for a period greater than the delay timer an alarm condition occurs. The text
message HIGH FACE VELOCITY or LOW FACE VELOCITY displays.
If the fume hood is operating in the minimum flow mode and the exhaust volume exceeds the
high or low alarm limit for a period greater than the delay timer, an alarm condition occurs.
The text message indicating HI FLO or LO FLO displays.
The fume hood operator may silence the horn for the current alarm event by pressing the
Horn Silence button.
For more information on ODP messages, see the Fume Hood Controller Operator Display
Panel User's Card (125-1976).
Alarm Strategies
One approach is to use the ALARMs to indicate a condition that requires immediate attention
and the WARNINGs to indicate a condition that may require attention but is not urgent. In that
case, the alarm limits would be set to indicate that it is unsafe to work at the fume hood. The
warning limits would be set at a level that is safe, but indicates that the system may not be
operating correctly. These values should be selected by the person responsible for laboratory
safety.