40 BAS-SVX44A-EN
Other Thermostat Functions
Local/Remote Humidity Display and Control
The thermostat has the capability of displaying the local/remote humidity readings, depending on
the value setting for Configuration Option Number 0200. An external humidity sensor is connected
to terminal Hp(+) and Hs(-). The table that follows provides information about humidity sensor
selection. For details about setting or changing dehumidification, refer to the section, “Dehumidify
Setup,” p. 28.
Option
Number 0200
Installer Parameter Number Value Description
General Information: For external humidity control, a 4–20 mA humidity sensor must be connected to the Hp and HS
terminals. Terminal Hp provides a 24 Vdc nominal to the external humidity sensor. Refer to Table 9, p. 41 below.
0
No humidity display.
1
Internal humidity sensor is used for control:
(a)
• 0% to 4% and 96% to 99% humidity; blinks the humidity reading and equipment runs for the 96% to
99%.
• 100% humidity; blinks 99 for humidity reading, blinks error code E1, and dehumidify equipment is ON.
• Communication down or invalid; blinks “--”, blinks error code E1, and dehumidify equipment is OFF.
(a) Blink rate for humidity display 0% to 4%, 96% to 100%, and “--” is 1.5 seconds ON and 0.5 seconds OFF. Blink rate for
error code E1 is 3 seconds Error code display and 1 second Time Display.
2
External humidity sensor is enabled:
(a)
• 96% to 99%; blinks humidity reading and dehumidify function is ON because of setpoint.
• 100%; blinks 99% for humidity reading and blinks error code E1. The dehumidify equipment is ON.
• 0% to 4%; blinks humidity reading dehumidify functions is OFF because of setpoint.
• Current less than 4 mA; blinks “--”, blinks error code E1, and dehumidify equipment is OFF.
Other related Option Numbers
0205; Dehumidification Control
0
Active control. The thermostat will toggle the Dh output terminal ON if humidity sensor value is 5% above
setpoint and toggle OFF when the humidity sensor value drop 5% below setpoint.
1
Passive control. The thermostat will run cool mode for up to 1 extra minute whenever there is a call for
cooling and a call for dehumidification.
0206; Internal Humidity Offset Adjustment: Allows adjustment of the internal relative humidity reading to account for
accuracy, tolerance, and potential drift. Firmware uses the adjusted value for display and humidity control.
-9% to 9% in 1% increments.
0207; External Humidity Offset Adjustment: Allows adjustment of the external relative humidity reading to account for
accuracy, tolerance, and potential drift. Firmware uses the adjusted value for display and humidity control.
-9% to 9% in 1% increments.
Humidity Reading
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