Rickard MLM RF User manual

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RICKARD 2018
MLM RF OPERATION MANUAL
MLM RF WIRELESS WALL
THERMOSTAT & POD SENSOR
OPERATING MANUAL
MLM RF WIRELESS WALLMLM RF WIRELESS WALLMLM RF WIRELESS WALL
THERMOSTAT & POD SENSORTHERMOSTAT & POD SENSORTHERMOSTAT & POD SENSOR
OPERATING MANUALOPERATING MANUALOPERATING MANUAL

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RICKARD 2018
MLM RF OPERATION MANUAL
Table of Abbreviations
AP Access Point RF base station module
ED End Device RF Wallstat or POD Sensor
LI Link Remote device mode
LIM Link Mode MLM Tool mode
MLM Multi Loop Modular VAV distributed control system
RF Radio Frequency
PS POD Sensor RF thermostat no display
RSSI Receive Signal Strength Indication Signal strength
SA Share Address Mode Remote Device mode
SAM Share Address Mode MLM Tool mode
SP Set Point Temperature control point
WS RF Wallstat RF wall mounted Thermostat with LCD
MCTI Maximum Communication Transmit Interval
Table of Contents
Table of Abbreviations 2
MLM RF Overview 3
Installation and Commissioning 3
Hardware Installation 3
The RF binding process 6
Discover the RF end devices 7
Grouping the Remote units 11
Verify and Replace End Devices 14
Removing an End Device 16
Moving End Device to a different Zone 17
Wallstat Operation 19
Adjust the Wallstat Setpoint 19
19 Set the Wallstat MENU Options
Installing the RF devices 6
Option 1 – Set the Wallstat RTC settings 20
POD Sensor Operation 22
Put the Wallstat in sleep mode (Default off state) 21
Option 2 – Set the Wallstat display for Batt/RSSI 21

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MLM RF OPERATION MANUAL
MLM RF Overview
The MLM RF consists of the following hardware units: an Access Point, the RF Wall Thermostat (Wallstat) and a RF
POD Sensor. This hardware unit in combination with the MLM Tool application software, revision 8.16 or later, com-
prise the MLM RF system.
The MLM RF system allows for the remote placement of Wall thermostats and POD sensors without any cabling re-
strictions. The installation will typically comprise of one Access point per Power Supply Unit connecting remotely to a
maximum of 15 Wall Thermostats or POD Sensors, allowing for up to 60 remote units per MCU. See ‘MLM 24 RF In-
stallation Diagram’ below:
The Access point is powered by the MLM bus. The remote RF units are each powered by a pair of Lithium AAA bat-
teries, with a typical operational life of 3- 5 years. To conserve power, the RF communication between units is adap-
tive and could vary between 1 and a maximum of 20 minutes (the default maximum is set at 10 minutes), depending
on the operational requirements of the control system. During commissioning however, this period is reduced to
once a minute.
Adaptive Communication
In order for the RF End Device (ED) to conserve power an adaptive communication interval has been implemented
between the ED and AP.
For a room temperature between 0.5°C above and 1.5°C below Setpoint, the ED response is more ‘active’. In this sce-
nario, the ED will transmit information to the Access Point for every 0.2°C change in room temperature, at 1 minute
intervals. If the temperature change is less than 0.2 °C for the entire duration of the Maximum Communication Trans-
mit Interval (MCTI), the ED will transmit every MCTI minutes. The MCTI can be set via MLM Application for each ED
to a maximum of 20 minutes.
For a room temperature above 0.5°C and below 1.5°C from Setpoint, the ED response is more ‘passive’. The ED will
transmit information to the Access Point for every 0.5°C temperature change in room temperature, at 1 minute inter-
vals. If the temperature change is less than 0.5°C for the entire duration of the Maximum Communication Transmit
Interval (MCTI), the ED will transmit every MCTI minutes.
The two graphs below shows communication in the ‘active and ‘passive’ regions. In this instance the MCTI is set to
the default of 10 minutes, but can be set between 1 and 20 minutes. Increasing the MCTI value will significantly in-
crease the battery life of the ED.

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MLM RF OPERATION MANUAL
The graph below shows the EP transmit response with Room Temperature changing from the ‘passive’ into the
‘active’ region.
The graph below shows the response inside the ‘active’ band. Note with a temperature change below 0.2°C the
MCTI period is applicable.

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MLM RF OPERATION MANUAL
The following MLM RF hardware models are available:
BU2011-2 MLM 24 RF Access Point
BU2111-2 MLM 24 RF Wallstat
BU2211-2 MLM 24 RF Remote Thermostat
Installation and Commissioning
The MLM RF units are fitted onto a standard MLM 24 installation. It interfaces to the MCU 2 V6.20, with the
MLM Tool V8.16, used for commissioning and diagnostics.
Note that when reference is made in this document to the End Device it refers to both the Wallstat and POD
sensor devices, the main difference between devices being the Wallstat LCD display.
Hardware Installation
The RF system requires an AP (Access Point) to be installed within a 50 meter radius of the remote units, either
Wallstat or POD sensor. One AP can be installed per Power Pack unit at any point on the MLM24 slave cabling
link. Ensure the AP is installed at a central vantage point, normally inside a ceiling void. Ensure the antennae
wire protruding from the AP enclosure is flexed in a vertical position. The AP is supplied with a 2m cable, install
at least one meter away from any sheet metal objects. Ensure the AP is securely fixed.
A maximum of 15 Wallstats or POD sensors can be installed per AP. Any combination of Wallstat and POD sen-
sor is allowed provided the total does not exceed 15 units. Please follow the installation instructions provided
indicating how to fit the remote unit back shell to a wall. Fit two of the correct battery types to each remote
unit, ensuring the correct polarity as indicated in pictures below. The batteries to be used are 1.5V AAA lithium
cells. Clip the remote unit onto the back shell. The remote unit will be in sleep mode with the LCD screen
switched off.
Battery Polarities
RF Wallstat RF POD Sensor