INSTALLATION & OPERATIONS GUIDE | MICROSET 4
© Honeywell LT-MS4IOG Rev. 04 | Revised October 2015
50
a
These BVs can be written to in DDC. They are also affected by the occupant selection of fan speed. Only
one of these BVs can be ON at once; otherwise, the fan displays high fan status. When fan is OFF, these
BVs are OFF.
Table 10 AV assignments for the Microset 4
DATA
POINT
READ
ONLY
DESCRIPTION
AV-90 Occupant-selected space temperature setpoint. May be written to in DDC.
AV-91 Setpoint high limit. Value of AV-90 can’t exceed this value.
AV-92 Setpoint low limit. Value of AV-90 can’t be below this value.
AV-93 Cooling offset in degrees. Added to the value of AV-90 in calculation of AV-99. See “Cooling and heating setpoint
calculation” on page 18.
AV-94 Heating offset in degrees. Subtracted from the value of AV-90 in calculation of AV-100. See “Cooling and heating
setpoint calculation” on page 18.
AV-95 Unoccupied cooling setpoint.
AV-96 Unoccupied heating setpoint.
AV-97 Override timer limit. After-hours override timer limit is in hours—3.5 = 3 hours 30 minutes. Housekeeping timer limit
is in minutes—3.5 = 3 minutes 30 seconds.
AV-98 After-hours/housekeeping override timer value. Resets to 0 when BV-64 is ON.
AV-99 X Current cooling setpoint. Equal to AV-90 + AV-93 + AV-106 while occupied (BV-67 ON). Equal to AV-95 while
unoccupied (BV-67 OFF).
AV-100 X Current heating setpoint. Equal to AV-90 – AV-94 – AV-106 while occupied (BV-67 ON). Equal to AV-95 while
unoccupied (BV-67 OFF).
AV-101
a
Space temperature to display. Range is 0–127 °F (-18–53 °C).
AV-102 X Humidity, read directly from Microset 4 humidity sensor.
AV-103 Outside air temperature (OAT) to display on Microset 4. Temperature range is -99–127 °F (-73–53 °C).
Not displayed if set to -100.
AV-106
b
Demand offset.
AV-107
c
Outside humidity (in %RH) to display on Microset 4.
AV-108 CO
2
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AV-109 MS4 Password - with new ROC for VLCs
AV-110 LED ON/OFF controls. Uses the following real data values for AV-110:
AV-110 = 0–16, All LEDs are OFF
AV-110 = 17, Blue LED is ON
AV-110 = 18–19, Amber LED is ON
AV-110 = 20–23, Green LED is ON
AV-110 = 24–31, Red LED is ON
a
The temperature read by the Microset 4 is available as AI-0. BV-75 controls transfer of AI-0 to AV-101.
b
Typically, this is a demand offset value controlled by a BACtalk demand limiting program or by an global controller DDC demand limit-
ing algorithm.
c
This value displays while AV-107 is non-zero. If another unit reads outside humidity, DDC writes this value to AV-107.
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