Operating Instructions

Fume Hood Controller Owner's Manual
10 Siemens Building Technologies, Inc.
Electronic Damper Actuator Assembly
The electronic damper actuator assembly consists of two parts, the electronic actuator and
the interface board. The actuator is connected to a damper or Venturi Air Valve in the fume
hood exhaust duct. The electronic actuator assembly is used because of its small size and
quick response time.
CAUTION:
Due to the design parameters and the response time required by the Fume Hood
Controller, the assembly must be replaced with the same part or a Siemens
Building Technologies, Inc. approved equivalent. Any modifications that are not
approved may affect the safety and performance of the Fume Hood Controller.
1 1 1
11.75
14.5
AO - E
MODULE
FUM0319R3
ACTUATOR
3.5
4.5
Figure 13. Electronic Actuator Assembly in an Exhaust Air Terminal Enclosure.
Pneumatic Damper Actuator
The pneumatic damper actuator is connected to a damper in the fume hood exhaust duct.
The standard pneumatic damper actuator used with the Fume Hood Controller is the No. 3
unit. The No. 3 actuator is used because of its small size and quick response time. The
actuator has a deep drawn aluminum housing, a rubber diaphragm, and a spring return rated
at 8 to 13 psi. See Figure 14.
WARNING:
Due to the design parameters and the response times required by the
Fume Hood Controller, the No. 3 actuator always must be replaced
with the same part or a Siemens Building Technologies, Inc. approved
equivalent. Any modifications that are not approved may affect the
safety and performance of the Fume Hood Controller.