Operating Instructions

Fume Hood Controller Owner’s Manual
28 Siemens Building Technologies, Inc.
27 UN ALRT AREA 941, 942 The open area in square feet (SQM) at which the Sash Alert
feature will start beeping the horn during unattended operation.
28 UNATTN TIME 941, 942 This point delays the sash alert function, a user defined
number of seconds, when the controller is in UNATTN mode.
30 AO2 RANGE 941, 942 Scaling for the Analog Output (AO2) point. To get the correct
output, the slope and intercept of this point must match the
point database of the room controller.
31 TABLE ACCESS 941, 942 This point controls the window into modifying certain functions.
This point controls what is displayed in points 21, 32 & 33.
32 TABLE FLOW 941, 942 This point modifies internal parameters as selected by point
31.
33 TABLE VOLTS 941, 942 This point modifies internal parameters as selected by point
31.
34 TRANS RANGE 941, 942 The maximum range, in inches of water (PA), of the differential
pressure transmitter. Standard values are 0.1 (25.3), 0.25
(62.275), 0.5 (124.55), and 1.0 (253).
35 EXH FLOW 941, 942 The calculated value, in CFM (LPS), of the exhaust airflow as
measured with the differential pressure transmitter sensor.
36 FLOW COEFF 941, 942 Gain factor for the flow sensor.
37 FLOW STPT 941, 942 Setpoint, in CFM (LPS), that the airflow is controlled to.
38 FLOW MIN 941, 942 Minimum flow setpoint allowed. FLOW MIN will override the
FVEL STPT if the calculated FLOW STPT is less than FLOW
MIN.
39 FAIL AREA 941, 942 When a sash sensor fails, the controller controls to the face
area defined by this point.
40 CAL DP TRANS 941, 942 YES or NO point used to calibrate the zero point of the
differential pressure transmitter.
41 DO1 SUP 941 Digital output 1 is used to control the analog output-pneumatic
(AO-P) supply valve or the AO-E module supply input.
41 DO1 942 Spare digital output controls a 24 Vdc load with an ON or OFF
status.
42 DO2 EXH 941 Digital output 2 is used to control the analog output-pneumatic
(AO-P) exhaust valve or the AO-E module exhaust input.
42 DO2 942 Digital output 2 is optional and is used to power the auto zero
module.
43 DO3 MUX 941, 942 Digital output 3 is optional and is used to control the MUX
board.
44 AI1 DP TRANS 941, 942 Analog input 1, a 4 to 20 mA signal from the differential
pressure transmitter. The point displays the mA value of input
from the sensor.
45 AI2 0.10V 941, 942 Analog input 2 is a 0 to 10 Vdc spare input.
46 AO1 0.10V 941 Spare analog output is a 0 to 10 Vdc output.
46 AO1 ACT SIG 942 Analog output 1 is used to control the voltage to an analog
actuator.