INSTALLATION & OPERATIONS GUIDE | MICROSET 4
© Honeywell LT-MS4IOG Rev. 04 | Revised October 2015
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M9—Hotel, Fan, Vacant
Set BV-64 OFF and BV-80 and BV-81 ON. The Across the Room View screen s blank, the fan screen
shows Auto, which cannot be adjusted, ad the Temperature screen does not allow adjustment of the
space temperature setpoint. The unit controls HVAC equipment to maintain space temperature within
the unoccupied setpoints.
If the Housekeeping Override timer is set above zero (0:00), the screen in Across the Room View
shows the override time remaining in minutes and seconds, the Temperature screen allows adjustment
of the space temperature setpoint, and the fan speed is adjustable.
During override the unit controls HVAC equipment to maintain space temperature within the user-
selected occupied setpoints.
This mode’s counterpart is M8, which is activated by setting BV-64 ON.
Figure 20 M9 screen flow sequence.
Vacant mode offers a temporary housekeeping override function. Housekeeping can press the screen
to select override. Once at override screen, housekeeping can then press the up arrow, which sets the
timer to the override limit (AV-97), interpreted as minutes and fractions of a minute (e.g. the maximum
AV-97 value of 9.5 becomes 9 min. 30 sec.). When the override time is greater than zero, housekeeping
can press the down arrow, which sets the timer to zero and restores normal Vacant operation.
When active, the housekeeping override function allows changing the user-selected Rented
temperature setpoint, and the unit controls HVAC equipment to maintain the space temperature at the
Rented setpoint; the Across the Room View shows the remaining minutes and seconds of override
time.
Housekeeping override can be exited by pressing the
DOWN arrow, which reduces the remaining
override time to zero and restores normal Vacant operation.
Across the Room View
“Vacant”
Temperature
Fan
Air
Quality
Windows
Lights
Humidity
Override
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