UM-15090500-AA1
Page
17
System Mode
•
The default control type is 2-stage cooling and heating with automatic
changeover. This makes the thermostat operate fully stand-alone. Control Type
can be selected in (tyPe) or [MSV7]. Manual Changeover control type allows
restriction of mode selection to Cool only or Heat only in applications where
necessary.
•
Occupied Cooling [AV0] and Heating [AV3] set points and Unoccupied Cooling
[AV8] and Heating [AV9] setpoints can be set individually for cooling and heating
modes, with either manual or automatic changeover control. Minimum deadband
[AV7] can be programmed as well.
•
For cooling/ heating with manual changeover control, cooling or heating can be
selected by pressing the MODE button or using a BACnet command to object [
MSV1]. In application where user control needs to be limited, the lock button
function can be used to disable MODE button.
Fan Control Output
•
Fan Output for Heating - the fan output for Heat mode is disabled “0” in [BV15]
by default. The thermostat lets the RTU circuity control the fan during Heat
mode. Fan output can be enabled “1” for Heat mode if desired [BV15].
•
Lowest Fan Speed is the speed the fan will default to after a control action
(Heating or Cooling). If the lowest fan speed [MSV4] is set as “Stop (1)”, the fan
will be automatically shut off after the control action (Heating or Cooling) and a
2-minute fan-off time delay. During this delay time, the AUTO icon will be
flashing, and the fan will shut off after the 2-minute time delay expires. If lowest
fan speed is set to “Low (2)” the fan will run continuously after a control action.