Figure 1. On/off mechanical control vs pi electronic control
6 BAS-SVU10C-EN
Product Overview
Features Overview
The Trane Communicating Thermostat includes the following features:
• Remote outdoor sensing capability for added flexibility
– System mode lock out
– Heat pump balance point settings
• Remote discharge air sensor input for monitoring purpose
– System efficien
cy feed
back
• Lockable keypads for tamper proofing (No need for therm
ostat guards)
• Automatic frost protection to prevent costly freeze damage
• Anti short cycle and minimum on/off run time pro
tection
. Reduces wear and maximizes life
span of mechanical equipment
• Two programmable digital inputs for added flexibility.
Each input can be programmed as the
following:
– None: No function will be associated with the input.
– Service: A b
ac
klit flashing Service alarm will be displayed on the thermostat LCD screen
when the input is energized. It can be tied in to the AC unit control card, which provides an
alarm in case of malfunction.
– Filter:
A backlit flashing Filter alarm will be displayed
on the thermostat LCD screen when
the input is energized. It can be tied to a differential pressure switch that monitor filters.
– Rem NSB: Remote NSB ti
mer clock input. Will disable the internal scheduling of the
thermostat. The scheduling will now be set as per the digital input. The menu part related
to scheduling is disabled and no longer accessible. It provides low cost setback operation
via occupancy sensor or from a dry contact.
– RemOVR: Temp
orary occupancy con
tact. Disables all override menu function of the
thermostat. The override function is now controlled by a manual remote momentarily
closed contact. When configured in this mode, the input operates in a toggle mode.
With this function enabled it
is no
w possible to toggle between unoccupied and occupied
setpoints for the amount of time set by parameter (TOccTime) temporary occupancy time.
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