ALERTON BACtalk Microset II Original Betriebsanleitung

Document ID:

Installation &

Operations Guide

6670 185th AVENE Redmond, WA 98052 USA Voice:425.869.8400 Fax:425.869.8445 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.

6670 185th AVE NE

Redmond, WA 98052 USA

Phone: (425)869-8400 FAX: (425)869-8445

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

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.

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