ALERTON BACtalk Microset II Original operating instructions

Document ID:
Installation &
Operations Guide
6670 185th AVENE Redmond, WA 98052 USA Voice:425.869.8400 Fax:[phone] e-mail:[email protected] www.alerton.com
LTBT-TM-MSET2
Quick Reference ..........................................................................3
Introduction..................................................................................4
Specifications........................................................................4
Mounting.......................................................................................5
Wiring............................................................................................8
Compatibility with Earlier Version VLCs...................................8
VLC Versions Prior to 1.06c..................................................8
VLC Versions 1.06c through 1.08.........................................8
Operational Overview..................................................................9
Hotel vs. Office Modes..........................................................9
Fan-control vs. No-fan-control Modes...................................9
Cooling and Heating Setpoint Calculation.............................9
Occupied Setpoint Logic (BV-67 ON)...........................9
Unoccupied Setpoint Logic (BV-67 OFF).....................9
After-hours Override Operation...........................................10
Housekeeping Override Operation......................................10
English and Metric Units.....................................................10
Outside Air Temperature (OAT) Display.............................10
LCD Backlight Operation.....................................................10
Testing the LCD..................................................................11
Operating Mode Specifics.........................................................12
DDC for Enabling Operating Modes....................................13
Office Modes.......................................................................14
M1—Office, No Fan, Occupied ..................................14
M2—Office, No Fan, Unoccupied...............................15
M3—Office, No Fan, Occupied, ON/OFF...................16
M4—Office, Fan, Occupied........................................17
M5–Office, Fan, Unoccupied......................................18
Hotel Modes........................................................................20
M6—Hotel, No Fan, Rented.......................................20
M7—Hotel, No Fan, Vacant .......................................21
M8—Hotel, Fan, Rented.............................................22
M9—Hotel, Fan, Vacant.............................................23
Field Service Mode....................................................................24
Balance Mode.............................................................................25
VLC DDC BV and AV Assignments..........................................26
Microset™ II
Contents

2LTBT-TM-MSET2
Microset™ II—Installation and Operations Guide
Important Safety Information
and Installation Precautions
Read All Instructions
Failure to follow all instructions may result in equipment damage or a hazardous condition. Read all instructions
carefully before installing equipment.
Local Codes and Practices
Always install equipment in accordance with the National Electric Code and in a manner acceptable to the local
authority having jurisdiction.
High Voltage Safety Test
Experienced electricians, at first contact, always assume that hazardous voltages may exist in any wiring system. A
safety check using a known, reliable voltage measurement or detection device should be made immediately before
starting work and when work resumes.
Lightning and High-voltage Danger
Most electrical injuries involving low-voltage wiring result from sudden, unexpected high voltages on normally low-
voltage wiring. Low-voltage wiring can carry hazardous high voltages under unsafe conditions. Never install or connect
wiring or equipment during electrical storms. Improperly protected wiring can carry a fatal lightning surge for many
miles. All outdoor wiring must be equipped with properly grounded and listed signal circuit protectors, which must be
installed in compliance with local, applicable codes. Never install wiring or equipment while standing in water.
Wiring and Equipment Separations
All wiring and controllers must be installed to minimize the possibility of accidental contact with other, potentially
hazardous and disruptive power and lighting wiring. Never place 24VAC or communications wiring near other bare
power wires, lightning rods, antennas, transformers, or steam or hot water pipes. Never place wire in any conduit, box,
channel, duct or other enclosure containing power or lighting circuits of any type. Always provide adequate separation
ofcommunications wiringandotherelectricalwiringaccordingtocode.Keepwiringand controllers at least six feetfrom
large inductive loads (power distribution panels, lighting ballasts, motors, etc.). Failure to follow these guidelines can
introduce electrical interference and cause the system to operate erratically.
Warning
This equipment has been tested and found to comply with the limits for a class A digital device, pursuant to part 15 of the FCC rules.
These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference, in which case the user will be required to correct the interference at his own
expense.
!
© 1999 - 2011 Honeywell. All Rights Reserved.
6670 185th AVE NE
Redmond, WA 98052 USA
Phone: [phone] FAX: [phone]
Web Site: www.alerton.com
Rev. 0003

LTBT-TM-MSET2 3
Quick Reference ID Display/control function Description Software remarks
"• Setpoint (°F or °C as appropriate)
• Override time remaining
• ON/OFF status
• Time of day (optional alternate)
• Value associated with data code
(field service mode)
Displays unit setpoint, after-hours/
housekeeping timer, ON/OFF status, or
value of field service code, depending on
mode of operation. Optionally, in modes
M1-M6, the time of day can display
alternately on a three-second cycle with
any of the above.
• Setpoint = AV-90.
• Housekeepingtimerorafter-hourstimer=
AV-98.
• ON/OFF mode = BV-65.
• Time of day is read directly from the VLC
when BV-82 is ON. The VLC must be
time-synced. BV-83 controls format (12-
or 24-hour).
o• Outside air temperature (OAT)
• Outside humidity (optional alternate) Displays OAT. Optionally, an outside humidity reading in %RH can display
alternately on a three-second cycle with
the OAT.
OAT = AV-103, which is written to in DDC.
%RH = AV-107. If AV-107 is non-zero
display will cycle.
"• Fan status Displaysoccupant-selectedfanstatusand
speed in modes M4, M5, M8, and M9. In
these modes, the occupant can use the
right UP/DOWN buttons to increase and
decrease the fan speed.In other modes,
occupant adjustment is disallowed,but
DDC can control the fanstatusandspeed
display nonetheless.
Only one of the following BVs may be ON;
otherwise, the Microset II indicates a high
fan speed:
• BLANK = BVs 72-74 OFF.
• Low = BV-72 ON.
• Med = BV-73 ON.
• High = BV-74 ON.
q• Space temperature
• Spacehumidity(optionalalternatefor
MS-2000H))
• Field service code (field service
mode)
Displays space (room) temperature. With
the Microset II with humidity sensor (MS-
2000H), the room %RH can display
alternately on a three-second cycle with
the room temperature.
• Space temperature = AV-101. AI-0 is
roomtemperatureasreadbytheMicroset
IIthermistor.VLCDDCmusttransferAI-0
to AV-101 for space temperature display.
• Display will cycle between space
temperature and humidity if BV-84 is ON.
• Space humidity = AV-102. No DDC
required. AV-102 cannot store other
values.
rRight UP/DOWN buttons
• Fan speed control (M4, M5, M8)
• After-hours increment/decrement
(M2, M5)
• ON/OFF control (M3, M6)
• Housekeeping timer ON/OFF
(M7, M9)
• Adjust value (field service mode)
Button press causes only affected value
on LCD to appear; all others disappear.
Display remains in this state for three
seconds after button release.
Button press affects BV-67 according to
mode (see Table 4 on p. 13). In fan modes,
button press also affects BVs 72–74
(Table 7 on p. 26).
"Left UP/DOWN buttons
• Adjust setpoint
• Display unoccupied heating/cooling
setpoints (M2, M5)
• Scroll through codes (field service
mode)
Button press causes only affected value
on LCD to appear; all others disappear.
Display remains in this state for three
seconds after button release.
Field Service Codes
Code Data point Meaning
UC. AV-95 Unoccupied cooling setpoint
UH. AV-96 Unoccupied heating setpoint
CO. AV-93 Cooling offset
HO. AV-94 Heating offset
HS. AV-100 Occupied heating setpoint
CS. AV-99 Occupied cooling setpoint
AL. AV-97 Override limit
HI. AV-91 Setpoint high limit
LO. AV-92 Setpoint low limit
SP. AV-90 Occupant-selectedspacetemperature
setpoint
SC. n/a Size, cooling—size of VAV cooling
duct diameter in inches or cm
SH. n/a Size, heating—size of VAV heating
duct diameter in inches or cm
CF. n/a Cold flow—the current airflow in the
VAV box cold duct in cfm or lps
HF. n/a Hot flow—the current airflow in the
VAV box hot duct, in cfm or lps
Mode IDs
M1—Office, no fan, occupied
M2—Office, no fan, unoccupied
M3—Office, no fan, ON/OFF
M4—Office, fan, occupied
M5—Office, fan, unoccupied
M6—Hotel, no fan, rented
M7—Hotel, no fan, vacant
M8—Hotel, fan, rented
M9—Hotel, fan, vacant

4LTBT-TM-MSET2
Microset™ II—Installation and Operations Guide
Introduction
The Microset™II is a wall-mounted sensor for BACtalk®
VLCs1. Depending on the VLC version, the Microset II may be
interchangeable with previous version BACtalk Microsets. See
“Compatibility with Earlier Version VLCs” on p. 8 for details.
The Microset II has a backlit liquid crystal display (LCD) and
intuitive button operation. It connects to a VLC using three low
voltage wires. The Microset II exchanges data and receives
commands from a VLC using a range of AV and BV data
points in the VLC that are reserved for Microset operation.
These data points are available from the VLC as BACnet
objects.
Features:
Outside temperature displayed at all times
Space (room) temperature displayed at all times
Optional outside and room humidity display
Fan speed display/adjustment (up to three speeds and
OFF)
Setpoint display/adjustment
After-hours/housekeeping overrides
Optional time of day display
Heating or cooling mode display
English or metric units
Specifications
1. The Microset II is not compatible with the Alerton TUX product line.
Table 1 BACtalk Microset II specifications.
Thermistor
Type
Resistance
Interchangeability
Time Constanta
Stabilitya
Accuracya
a. Based on normal operating conditions.
The thermistor is integrated with the device. The unit is a microprocessor-based sensor with a built-in analog to digital
converter for temperature and humidity, which is designed to communicate directly to VLCs.
Uni-curve Type II.
10KΩat 77°F (22°C).
0.36°F (0.2°C).
10 seconds (to 66% of new temperature).
0.036°F (0.02°C) drift per year.
±0.36°F (0.2°C) over range of 32–158°F (0–70°C).
Power 24 VAC/VDC @ 25mA for backlit display. Orange lead terminates to 24 VAC or 24 VDC terminal on VLC. Sensor draws
5 VDC @ 10 mA from VLC.
VLC Connection 18 AWG, shielded, 3-conductor, 250 ft. max. Black wire to VLC IN, white to VLC input COM, orange is optional 24 VAC
for backlit display. Low capacitance wire recommended.
Dimensions 4.6" (117 mm) H X 3.0" (76 mm) L X 0.7" (18 mm) D.
Optional Humidity Sensor
Total Accuracy
Operating Temp.
Repeatability
Interchangeability
±2% RH, 0–100% RH @ 25°C, with saturated salt calibration.
-40–185°F (-40–85°C).
±0.5% RH.
±5% RH up to 60%RH, ±8% RH at 90% RH (typical humidity).
Ratings Listed Underwriters Laboratory as an accessory for VAVs and VLCs.
EMC Directive 89/336/EEC (European CE Mark). Pending.
FCC Part 15, Subpart J, Class A. Pending.

LTBT-TM-MSET2 5
Mounting
Mounting
The Microset II is designed to be wall-mounted indoors, with
dimensions ideal for mounting to a single-gang electrical box.
See Fig. 3 on p. 6.
Mount in a clean, dry location away from windows, air ducts,
and other places where environmental factors may affect
temperature and humidity readings.
Note If you mount the Microset II on the interior of an
outside wall, thoroughly insulate so outside air behind the
sensor doesn’t affect the sensor reading.
To meet requirements of the Americans with Disabilities Act,
mount no higher than 48" from the floor and with a minimum
clear floor space of 30" X 48" (760 X 1220 mm). See Fig. 1.
Fig. 1 Mounting guidelines for compliancewith Americans with Disabilities
Act (ADA).
Fig. 2 Backplate mounting dimensions.
The Microset II ships with the backplate on backwards. This
makes the backplate easier to remove during installation. Two
screws attach the backplate to an electrical box, mud ring, or
other mounting surface.

6LTBT-TM-MSET2
Microset™ II—Installation and Operations Guide
kTo secure the Microset II to a mounting surface:
1Remove the backplate from the Microset IIand the
wiring pigtail.
2Flip the backplate so the smooth side faces the
mounting surface.
3Rethreadthewiresthroughthecenterknockoutonthe
backplate.
4Use wire nuts or other connectors to splice the
Microset II wires to the wire run from the VLC (see
“Wiring” on p. 8 for details).
5Secure the backplate to the mounting surface with the
enclosed screws or your own.
6Hold the Microset II at an angle above the backplate
and then slide it down.
The two tabs on the inside top edge of the Microset II
should fit into the tab slots on the backplate
(see Fig. 3).
7Push the bottom of the Microset II onto the backplate
legsuntiltheysnapsecurelyonthetab-stops(seeFig.
3).
Caution Do not crimp or kink the pigtail wires.
Fig. 3 Microset II mounting.
1. Splice Microset II
pigtail to VLC wire run.
2. Secure backplate to
mounting surface with
screws (provided).
3. Insert Microset II tabs
into backplate slots.
4. Push bottom of Microset
II until the backplate
legs click into position.
To VLC. (Black to IN-0. White
to COM. Orange to 24 VAC.)
Backplate legs (face
away from wall)
Microset II backplate
Microset II pigtail
Microset II

LTBT-TM-MSET2 7
Mounting
kTo remove the Microset II from the backplate:
1Insert a thin, flat-tipped screwdriverinto the last vent
slot on the bottom of the Microset. Position the
screwdriver so that you can apply pressure to the
backplate leg (see Fig. 4, bottom view).
2Firmly depress the backplate leg until it is clear of the
tab-stop on the Microset II.
3Gently pull the freed corner of the Microset II away
from the wall.
4Repeat steps 1–4 on the other side.
5Push upward on the bottom of the Microset II until it is
completely free of the backplate.
Fig. 4 Removal of Microset II from backplate.
Microset II backplate
Side view
Bottom view
Microset II backplate
Backplate leg
Place screwdriver here to
depress backplate leg.
Repeat on other side.
Backplate leg
1. Insert screwdriver in
last vent slot and
contact backplate leg.
2. Push upward with
screwdriver, depressing leg
until it is free of tab.
3. Lift bottom corner
away from backplate.
4. Repeat on other side.
5. Push upward on
Microset II until free of
the backplate.

8LTBT-TM-MSET2
Microset™ II—Installation and Operations Guide
Wiring
The Microset II has a three-conductor connection to the VLC.
See Fig. 5 for wiring connections and terminations. Also see
the Gen 4 VLC Installation and Wiring Guide (LTBT-TM-
GEN4VLC) for detailed input wiring instructions for VLCs and
the Network Installation and Design Guide (LTBT-TM-
NETWRK) for instructions on installing twisted-pair wiring.
Wire Specifications
Type: 18 AWG, shielded
Length: <250 ft.
Resistance: <12Ω
Fig. 5 Basic Microset II wiring.
Note Do not run Microset II wire in the same conduit or
alongside building power cables. This can cause
interference. If power cables must be crossed, cross at
90°.
Compatibility
with Earlier
Version VLCs
VLC firmware versions prior to 1.09 do not fully support the
Microset II. Use the following information to determine if
retrofitting older version VLCs with a Microset II will provide
a satisfactory feature set for the application.
VLC Versions Prior to
1.06c
VLC versions earlier than 1.06c do not have BV-72 and higher
(see Table 7 on p. 26). They do not support fan-control or hotel
modes. None of these options is available: space humidity
display, outside humidity display, fan speed display, and time
of day display. The LCD backlight is always ON.
VLC Versions 1.06c
through 1.08
VLC versions 1.06c–1.08 do not have BV-80 and higher (see
Table 7 on p. 26). The Microset II may be used in fan-control
applications by cutting a circuit board trace on the Microset II
(contact your Alerton Representative or Alerton Technical
Support). If the trace is cut, BV-65 selects office mode or hotel
mode (ON = office). None of these options is available: inside
humidity display, outside humidity display, and time of day
display.
Table 2 VLC wire terminations.
Wire color VLC terminal
Orange 24VAC or 24VDCa
a. The orange lead powers the backlit display. It is optional; if left
unterminated, the backlight is not available. Connecting to a
VLC terminal is preferred, but the orange lead may connect to
any point on the VLC source. Do not connect to a 24VAC
source that does not have common ground with the VLC.
Black IN 0/MSET
White COM

LTBT-TM-MSET2 9
Operational Overview
Operational
Overview
The Microset II operates in one of nine modes. In each mode,
the Microset II displays data and has operational features
unique to that mode. Operating modes are listed in Table 3 on
p. 12 and Table 4 on p. 13.
Review the different Microset II modes and determine which
one is best for your application. Then use DDC in the VLC to
set BVs 64, 65, 80, and 81 according to Table 4 on p. 13.
All Microset II operating logic executes in VLC DDC.
BACtalk data displays can directly reference data points in the
VLC reserved for Microset II operation. This offers the system
operator flexibility and ease of use—with a mouse click, the
system operator can control Microset II operations.
Hotel vs. Office Modes
BV-81 controls hotel and office mode (BV-81 ON = hotel). The
primary difference between hotel and office mode is the
function of the after-hours timer as compared to the function of
the housekeeping timer. See “After-hours Override Operation”
and “Housekeeping Override Operation” herein. Other
operational details vary as well. See “Operating Mode
Specifics” on p. 12.
Fan-control vs. No-
fan-control Modes
BV-80 determines fan control mode (BV-80 ON = fan- control
mode).
In fan-control modes, the occupant can select fan speed at the
Microset II. Fan-control modes are typically used in fan-coil,
air conditioning, or unit ventilator applications.
In no-fan-control modes, the occupant is unable to select fan
speed. However, if desired, VLC DDC can cause fan
symbology to display at the Microset II. No-fan-control modes
are typically used in VAV or heat pump applications.
Cooling and Heating
Setpoint Calculation
The Microset II calculates current heating and cooling
setpoints (AV-99 and AV-100) using different logic in occupied
and unoccupied modes (as read from BV-67). Using the current
setpoints (AV-99 and AV-100) in your control DDC is most
efficient because the VLC automatically calculates these
setpoints according to the operating status of the Microset II.
Occupied Setpoint Logic
(BV-67 ON)
Current cooling setpoint (AV-99) = Occupant-selected
space temperature setpoint1(AV-90) + Cooling offset (AV-
93) + Demand offset (AV-106)
Current heating setpoint (AV-100) = Occupant-selected
space temperature setpoint1(AV-90) – Heating offset (AV-
94) – Demand offset (AV-106)
Unoccupied Setpoint Logic
(BV-67 OFF)
Current cooling setpoint (AV-99) = Unoccupied cooling
setpoint (AV-95)
Current heating setpoint (AV-100) = Unoccupied heating
setpoint (AV-96)
1. The system’s setpoint high limit (AV-91) and setpoint low limit (AV-92)
limit this value.

10 LTBT-TM-MSET2
Microset™ II—Installation and Operations Guide
After-hours Override
Operation
Unoccupied office modes (M2 and M5) offer an after-hours
override feature, which enables the occupant to override a
scheduled unoccupied status at the Microset II.
In override, the unit calculates current setpoints (AV-99 and
AV-100) using occupied setpoint logic (see “Cooling and
Heating Setpoint Calculation” on p. 9). The occupant can
increase or decrease the timer to the next half-hour increment.
The occupant can also adjust the setpoint and fan speed (if
applicable).
The after-hours timer (available in software as AV-98)
automatically counts down whenever it is set to a non-zero
value.
To disable this feature, set the after-hours timer limit (AV-97)
to zero.
DDC can read override status from BV-66, which is ON if the
after-hours timer is non-zero. When BV-64 (occupied/
unoccupied command) is ON, the after-hours timer
automatically resets to zero.
Housekeeping
Override Operation
Vacant hotel modes (M7 and M9) offer a housekeeping
override. This is similar to the after-hours override in that it
causes occupied setpoint logic to be in effect. However, there
are important differences: the occupant can only start and stop
the timer (timer adjustment is not allowed); the override timer
limit (AV-97) is read in minutes, not hours; and the occupant
can’t adjust setpoint or fan speed.
This feature can be disabled by setting the override timer limit
(AV-97) to zero.
DDC can read override status from BV-66, which is ON if the
housekeeping timer is non-zero. When BV-64 (occupied/
unoccupied command) is ON, the housekeeping timer
automatically resets to zero.
English and Metric
Units
You can set the Microset II to display English or metric units
based on the selection in the VLC DDC header file or you can
toggle that status in software. The English or metric setting at
the VLC is referred to as the native units mode.
BV-69 can be set ON to reverse native units mode for the
Microset II display. Thus, if the VLC is set to English, and BV-
69 is ON, the Microset II displays units in appropriate metric
equivalents. This enables the system to display units at the
Microset II according to occupant preference without a
programmer having to write separate DDC sequences around
each unit of measure.
See the Programmer’s Guide and Reference for BACtalk
Systems (LTBT-TM-PRGRMR) for information about setting
native units in the VLC.
Outside Air
Temperature (OAT)
Display
For OAT read at another unit to display at the Microset, the
OAT value must be written in LSi DDC to the Present Value of
AV-103 in the VLC.
LCD Backlight
Operation
The orange Microset II wire must provide 24VAC/VDC for the
backlight to operate. BV-79 controls backlight operation. If
BV-79 is OFF, the backlight turns ON when any button is
pressed and stays on for 20 seconds after there is no button
activity. If BV-79 is ON, the backlight is ON continuously.