Micropelt MLR003 Anwendungshandbuch

Heating Radiator Thermostat

MLR003RiEU61-07-1.1

LoRaWAN CLASS A EU868MHz SF7BW125

User Manual and Device Specification



The Micropelt MLR003R product series has been designed for use with heating radiators and M30x1,5

valve thread. LoRaWAN allows to control heating radiators over long distances, even inside buildings.

Significant cost savings on labor and material cost for wiring, network infrastructure, buildingstructural

changes will reduced the amortization time over conventional systems while installing the system is only

a matter of days.



For inquiries please visit us at:  Customer Service Portal

Email: [email protected] Telephone +49 7665 932183 0


Revision History MLR003RiEU61-07-1.1 ................................................................................................... 3
Use and Safety MLR003R .......................................................................................................................... 5
General Description MLR003R .................................................................................................................. 6
Operating Modes MLR003R....................................................................................................................... 8
Power Consumption MLR003R............................................................................................................... 10
Power management MLR003R ............................................................................................................... 11
1 Energy Harvesting................................................................................................................................... 11
1.1 Device power management.................................................................................................................... 11
1.2 Energy Storage ........................................................................................................................................ 12
Forced Heating MLR003R........................................................................................................................ 15
1 Slow Harvesting ...................................................................................................................................... 15
Communication Profile MLR003RiEU61-07-1.1 ..................................................................................... 16
1 FPORT 0x01 UPLINK: MLR003RiEU61-07-1.1 to Controller / Network Server ...................................... 17
2 FPORT 0x01 DOWNLINK: Controller / Network Server to MLR003RiEU61-07-1.1 ................................ 20
3 FPORT 0x02 REV Number, Hardware and Firmware Version MLR003R................................................ 24
4 FPORT 0x03 Motor operating range MLR003R....................................................................................... 25
5 FPORT 0x04 LoRa Spread factor MLR003R............................................................................................. 26
6 FPORT 0x05 Slow Harvesting SH and Valve Opening Point Detection OPD MLR003R ........................ 27
Operating Instructions MLR003R ........................................................................................................... 28
1 User Interface functionality.................................................................................................................... 28
2 Setting up a Gateway.............................................................................................................................. 28
3 Pairing the Device with a Room Controller or Gateway........................................................................ 29
4 Mounting Position and OFF .................................................................................................................... 29
5 Attaching and Activating a unit .............................................................................................................. 29
6 Reset (from Normal Operation only)...................................................................................................... 30
7 No Reset from Mounting Position .......................................................................................................... 30
8 Removal from the Valve.......................................................................................................................... 30
9 Temperature Control Loop..................................................................................................................... 30
10 Antifreeze................................................................................................................................................. 30
11 Battery Charging Flow Chart .................................................................................................................. 31
Performance Data MLR003RiEU61-07-1.1.............................................................................................. 32
Mechanical Interface to circulation valve body MLR003R .................................................................... 35
CE Conformity MLR003RiEU61-07-1.1.................................................................................................... 36
Labeling MLR003R................................................................................................................................... 37
1 Product Label .......................................................................................................................................... 37
2 NFC Tag Label.......................................................................................................................................... 38
Accessories MLR003 ................................................................................................................................ 39
1 MLR003-KEY Magnetic switch................................................................................................................. 39

Revision History MLR003RiEU61-07-1.1 – 3

•

1 Revision History MLR003RiEU61-07-1.1

Rev.-No. Description of Revision Revised

Date

v8e has been derived from the Micropelt technology

platform description v7e.

Changed name to MLR003.

Document describes the first release of MLR003.

Most recent changed against the general-purpose

platform description.

 

v8e Removed Summer mode

Added 480min RF CI in Payload

Added temperature offset for valve- and ambient-

sensor.

Added harvesting halt during radio communication.

Schmidt/

Volkert

Jan. 21, 2021

v10e Change product name to MLR003

General update on description and user guide

Volkert Jun. 21, 2021

v11e Change downlink payload

Added Label spec.

Couzens

Volkert

Jun. 22, 2021

v12e Change Activating from Mounting Position operating

flow diagram

Changed front page picture of MLR003

Couzens

Volkert

Aug. 04, 2021

Aug. 20, 2021

v13e Full document review

Update cover page, headlines, added sect. 7.2

Couzens

Volkert

Sept. 22, 2021

Sept. 23, 2021

v14e Adjust speaker beeping communication in user

interface

Added SF7BW125 to front page

Removed downlink “reserved” bytes 7 and 8

Added picture of MLR003-KEY

Couzens

Volkert

Sept. 28, 2021

Oct. 11, 2021

Revision History MLR003RiEU61-07-1.1 – 4

•

V15e Added clauses and information required by product

safety, EN60335-1:2012.

Described the position of the labels

Corrected distortion of “CE”-print on product label

Schmidt Nov. 05, 2021

V16e Added certification details

Added contact email

[email protected]

Corrected NFC-Tag label (16.2)

Volkert Nov 19, 2021

v17e Update from Rev1.0 to Rev1.1:

Extend Uplink payload to include User Mod and User

Value

Extend motor Reference Run travel distance

Added declaration of conformity (CE)

Couzens

Volkert

Jan. 24, 2022

Added new section 09.11 Battery Charging Flow Chart Bala Feb 16, 2022

Changed product name and article number to

MLR003RiEU61-07-1.1

Volkert Feb 23, 2022

Use and Safety MLR003R – 5

•

2 Use and Safety MLR003R

Use and safety instructions:

This appliance is not intended for use by persons (including children) with reduced physical, sensory or

mental capabilities, or a lack of experience and knowledge, unless they have been given supervision or

instruction concerning the use of the device by a person responsible for their safety.

This product is not a toy. Children shall be advised to refrain from playing with it.

The metallic part of the unit’s housing serves as a heat sink. Be sure that the air circulation around it is not

obstructed by furniture, curtains, plants, or any other object.

If the device has been stored in a cold environment, make sure that it resumes close to room temperature

before use. This is to prevent damaging due to condensation.

The thermostatic head is designed for indoor use only. Do not allow the thermostatic head to get wet. Its

sensitive electronics can be affected.

The unit is best cleaned with a dry or slightly damp cloth. Do not use aggressive cleaning agents or solvents.

Refrain from exposing the unit to environmental stress such as high mechanical forces (do not step on it),

strong vibrations, direct sunlight or extreme temperatures.

The unit must not be disassembled or modified. There are no user-serviceable parts inside.

Be aware that correct operation can be affected by strong electromagnetic fields. Typical sources of such are

mobile phones, 2-way radios, RC transmitters, microwave ovens, electric motors.

The thermostatic head has been designed and must solely be used for the purpose of controlling a M30 x 1.5

circulation valve. Any other use may pose a hazard to the device itself, to the equipment involved, or to the

health of the user.

When operating the device in a workplace environment, be sure to observe the workplace regulations that

may apply.

Intended use: The self-powered thermostatic head is suitable solely for controlling water-filled heating

radiators. Any other use – including control of floor heating systems – is not permitted and can result in

malfunctions or damage. Do not disassemble or modify any part of the product. It is important to comply

with the safety notice included in these operating instructions.

In case of questions, please contact us:

https://micropelt.atlassian.net/servicedesk/customer/portal/1

Micropelt - a brand of EH4 GmbH. Email: [email protected]. Telephone +49 7665 932183 0

General Description MLR003R – 6

3 General Description MLR003R

This document defines the properties of Micropelt’s maintenance free, intelligent thermostatic head

MLR00RiEU61-07-1.1. This MLR003 is used for control of heating radiators with standard valve connection

M30x1.5 (Section 10).

MLR00RiEU61-07-1.1 is an 868MHz LoRaWAN CLASS-A wireless actuator operating in SF7BW125.

LoRaWAN end-devices of Class A allow for bidirectional communications whereby each end-device’s

uplink transmission is followed by two short downlink receive windows. The transmission slot scheduled

by the end-device is based on its own communication needs with a small variation based on a random

time basis (ALOHA-type of protocol). Class-A operation is the lowest power end-device system for

applications that only require downlink communication from the server shortly after the end-device has

sent an uplink transmission. Downlink communications from the server at any other time will have to

wait until the next scheduled uplink. SF7 is using the shortest time-on-air to maximize the number of end

nodes operating on one gateway.

Each standard production MLR00RiEU61-07-1.1 unit has a unique DEVEUI, APPEUI (JOINEUI) and a

randomly generated APPKEY. Device credentials are secret and will only be submitted with the product

delivery. Questions related to device credentials can be sent to [email protected].

To operate the device, the unit must be paired with a compatible controller or gateway unit supporting

its communication profile (Section 7). The pairing is done as described in Section 8.3. Once mounted and

activated on the valve body using the magnetic key, a calibration cycle starts to automatically adapt

itself to the individual valve. Then it is ready for use. Adapters are available for a majority of non-M30x1.5

valve bodies.

Success of activation or deactivation is signaled by tone signals and LED (Section 8.1).

The product is delivered in mounting position (off) with the valve plunger completely retracted. When

operating, the unit recognizes if it is installed on a valve body by means of internal force and travel

distance measurement. The device has built-in motor error detection "ME". The ME bit signals motor

issues during normal operation.

The actuator operates with a communication profile as further specified in Section 11. The default radio

communication cycle is 10 minutes. Installation, activation and a successful join with the network server

will immediately set the radio communication interval to every 10 seconds for an installation period of 5

minutes to provide rapid feedback. Temperature values are transmitted in both raw and corrected

temperature formats.

The actuator has a built-in, valve-side temperature sensor to determine the flow pipe temperature. A

controllable offset of +5°C has been added to compensate for the temperature drop between the hot

water and the sensor element located in the actuator’s aluminum valve adapter.. The device transmits a

variety of information to the control unit by sending an uplink (Section 7.1). The control unit responds by

sending a downlink (Section 7.2).

The integrated valve side temperature sensor is also used for freeze protection. Freeze protection is

activated at <=6°C.

The ambient sensor is used to measure the room temperature. During heating operation, the ambient

sensor is influenced by self-heating of the metallic device housing. The algorithm used to estimate the

actual ambient temperature is described in Section 12.9.

General Description MLR003R – 7

Unsuccessful radio communication attempts are reported by status bit RCE. After 6 consecutive

unsuccessful radio communication attempts (acknowledge from the gateway), the actuator

automatically switches to the safety mode and safety values as specified by the user. In this situation, the

radio communication period is increased to once every hour.

The actuator generates the required electrical energy for operation (motor, sensors, and radio

communication) by means of a built-in thermoelectric generator (TEG) and therefore operates

maintenance-free. It harvests energy from the temperature difference between the valve body heat and

ambient temperature (usually room temperature). An additional energy source such as a primary battery

or external power supply is not required. The internal energy storage device is charged upon delivery, so

that sufficient energy is available for installation.

Operating Modes MLR003R – 8

4 Operating Modes MLR003R

Installatio

n cycle

Standard

operation

Idle state Radio

failure

Forced

heating

Freeze

Protection

Comments Valve target

Room

target

temperatur



Phases

between

monitoring

and

communica

ting

Transmit

messages

not

received by

the

gateway

Valve opens

to 50%

(or remains

in current

position if

current

position is

>= 50%)

Valve opens

to 95%

Trigger Magnetic

switch.

Join accept

from

Gateway,

& Device is

mounted

Internal

timer

Internal

timer

From

activation:

No Gateway

connect

from

standard

operation: 6

consecutive

Gateway

communica

tion failures

Battery

voltage < 2V

Flow sensor

raw

temperatur

<= 6°C

Radio

communic

ation

interval

(RCI)

10 seconds

for 5

minutes

5 minutes

10 minutes

60 minutes

120

minutes

480

minutes

OFF Three times

30 seconds

Then once 2

minutes

Then 60

minutes

OFF OFF

Dynamic

change of

communic

ation

interval

No Yes No No No No

Operating Modes MLR003R – 9

Sensors

(flow,

ambient)

Active,

every 10

seconds

Active OFF



Active OFF Active,

every

2 minutes

Freeze

protection

Active,

every 10

seconds

Active,

every 150

seconds

OFF Active,

every 150

seconds

OFF Active

Motor

operation

Reference

run.

Then active,

according

to Radio

Communica

tion

Active,

according

Radio

Communica

tion

OFF Active OFF OFF

Monitoring

of battery

Active,

every 10

seconds

Active OFF Active Active,

every 12

hours

Active,

every

2 minutes

Internal

temperatu

controller

If User

Mode is Set

Point

Ambient

Temperatur

e: active

If User

Mode is Set

Point

Ambient

Temperatur

e: active

OFF If Safety

Mode is Set

Point

Ambient

Temperatur

e: active

OFF OFF

Default

upon

activation

and no

downlinks

Setpoint

ambient

20°C

Setpoint

ambient

20°C

Setpoint

ambient

20°C

 



Power Consumption MLR003R – 10

5 Power Consumption MLR003R

Function Power consumption

average current draw

Battery runtime

w/o active harvesting

@ 500mAh**

Mounting position 2.2 µA 25.9 years

Radio communication every 10 min.

No motor = unheated room

n.n µA n.n years

Radio communication every 10 min.

Motor movement: Morning: Full open

Throughout the day: 10% every 30 min.

Evening: Full close Total: 400%

nn.n µA n.n years

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