Siemens 125-5033 Manuale d'uso - Pagina 24

Sfoglia online o scarica il pdf Manuale d'uso per Controllore Siemens 125-5033. Siemens 125-5033 35. Two-state constant volume fume hood controller

Fume Hood Controller Owner's Manual

In addition to setting up the purge sequence to effectively handle the exhaust needs,

decisions must be made on how to use the information available at the central reporting

station. Consult your local Siemens Building Technologies, Inc. representative for more

information on central reporting and trending of emergency purge information.

Fail-safe Operation

If the Fume Hood Controller or one of its accessories fails, then a failure mode sequence will

be initiated.

If the Fume Hood Controller power fails, the exhaust flow control device will go to the full

open position. Since there would be no power to the controller, no LEDs or display will be

available on the ODP.

NOTE:

If the ODP fails, the controller will continue to control the fume hood face velocity. However,

no display or audible alarming will be available.

If the differential pressure transmitter fails, the controller will control the exhaust flow control

device to the fully open position. The ODP will display FFF and GENERAL FAILURE.

If the electronic actuator or interface board fails then alarms are displayed on the ODP

indicating unsafe operating conditions.

If the actuator fails due to a leak, then the exhaust flow control device will go to the full open

position. Alarms will be displayed on the ODP indicating unsafe operating conditions.

If the AO-P module fails, alarms will be displayed on the ODP indicating unsafe operating

conditions.

If the power fails to both the exhaust fan and the controller, there will be no

indication except for the absence of the noise that the air makes during

normal operation.

Siemens Building Technologies, Inc.