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ManualsBrandsSiemens ManualsBuilding automationBACnet PTEC Controller Constant Volume with Electric Heat, Application 6662, Application Note
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Sequence of Operation
Room Unit Operation
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Siemens Industry, Inc.
Application Note, App 6663
Floating Control Actuation Auto-correct
In addition to the existing options for floating control actuator full stroke actions, all
floating control actuators are provided with additional logic to fully drive open or closed
when commanded to 100% or 0%.
Room Unit Operation
Sensor Select
SENSOR SEL is a configurable, enumerated point (values are additive). This point tells
the controller what type of room unit is being used and how to handle loss of data. It
also provides the ability to enable the optional RH and CO2 sensors and which
thermistor type is connected.
Room Temperature, Setpoint, RH and CO2
When the digital room unit (Series 2200/2300) is used, SENSOR SEL selects the
source for temperature and setpoint and enables a loss of communications
indication:
– Temperature/Setpoint enable and supervision for fail communications
(temperature) with a value of 1.
– Relative humidity enable and supervision for fail communications with a value
of 2.
– CO2 enable and supervision for fail communications with a value of 4.
When the analog room unit (Series 1000/2000) is used, default temperature
sensing (0) from an analog room unit is enabled (relative humidity and CO2
sensing are not available and should not be selected).
Thermistor Inputs
Default for either input is 10K.
To enable 100K thermistor on input, see the following table for additive values of 8
or 16.
Other Inputs (only available on Digital Room Unit)
Use the following table to select and enable communications supervision of room
temperature/setpoint dial, relative humidity and CO2 for additive values of 1, 2 and
4.
SENSOR SEL
Value *
(additive)
Description
(include values to enable feature)
1
Select Digital Room Unit (for temperature sensing and setpoint dial)
2
Relative Humidity (RH) sensing
4
CO
2
sensing
8
If short board: 100K Ω thermistor on AI 3 (else input is 10K Ω)
If long board: 100K Ω thermistor on AI 5 (else input is 10K Ω)
16
Long board only: 100K Ω thermistor on AI 4 (else input is 10K Ω)