Laing BM mini Series User manual

Installation and operation manual
for mixing set BM mini

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Installation and operation manual BM mini
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Design BM mini
1. Version KF = Remote sensor thermostat (8-26°C, 5 m) or
Version RT = thermoelectric drive for the connection of a room
thermostat (not included in delivery) or
Version KR = thermoelectric drive, pre-wired with pump including
a constant temperature control (A1-121 R, 20-70°C) for the
connection of a room thermostat (not included in delivery)
2. Laing circulating pump with spherical motor A1-121 resp. A1-121 R
3. Venting device
4. Supply radiator-/boiler circuit
5. Return radiator-/boiler circuit
6. Supplyoorheatingcircuit
7. Returnoorheatingcircuit
8. Adjustable mixing valve
9. Adjustable bypass for the radiator-/boiler circuit
(recommended to be closed)
10. ON-OFF-switch for pump
11. Flow temperature setting (KR version only)
10
2
6
7
9
5
4
8
1
3
11

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Installation and operation manual BM mini
Table of contents
Design BM mini ...........................................................................................2
Technical Data..............................................................................................3
Application....................................................................................................4
Mounting instructions....................................................................................4
Hydraulic connection ....................................................................................5
Filling and priming the UFH system..............................................................6
Starting of operation without given values..................................................12
Starting of operation with given values (pre-setting) .................................. 13
Assembly of wall bracket............................................................................15
Dimensional drawing ..................................................................................16
Pump curve ................................................................................................16
Product range, accessories and spare parts..............................................17
Electrical connection...................................................................................18
Technical Data
Max. system pressure 1 Mpa (10 bar)
Max.systemtemperature 110°C(boilercircuit),55°C(oorheating)
Max. differential pressure 100 kPa (1 bar) in the
radiator-/boiler circuit
Electrical connection 1 x 230 V / 50 Hz
Power consumption 25 Watt (circulating pump)

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Installation and operation manual BM mini
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Application
• TheBMminiisdesignedtosupplyoorheatingareasuptoapprox.40
sqm (from pipe 16x2 mm onwards) in one- or two-pipe-systems. The
 connectionofupto2oorheatingcircuitsispossible.
• Three versions are available:
BM mini KF: Mixing set with room temperature guided control,
made of thermostat (10-26°C + frost protection)
with remote sensor (5 m).
BM mini RT: Mixing set for temperature guided control, made
of thermoelectric drive for the connection of a room
thermostat (room thermostat not included in
delivery- see accessories in product range).
BM mini KR: Mixing set with integrated constant temperature
control (20-70°C) for the connection of a room
thermostat (room thermostat not included in
delivery- see accessories in product range).
• The BM mini is provided with a temperature protection system that
 restrictsthesupplytemperatureintheoorheatingcircuittomax.55°C.
Mounting instructions
• BM mini will be connected directly to the existing radiator-/boiler circuit.
• When two circuits are connected to the BM mini, the shortest circuit
must be balanced by using an adjustable return screw connection.
• The BM mini has to be mounted in a horizontal position (see page 2).
Left or right connection to the radiator-/boiler circuit is possible (see
page 9).
• TheBMminihastobeinstalledonahigherlevelthantheoorheating
installation.

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Installation and operation manual BM mini
• Ensure that the pre-pressure to the BM mini from the radiator-/vessel
circuit is minimum 10 kPa (1 m).
• BeforerunningtheBMminipleasecheck,thattheoorheatingsystem
 islled,completelyvented,andprovedagainstleakage.
• Since the circulation pump might create under certain circumstances
 someownoise,theBMminishouldbeplacedawayfromnoise
sensitive areas (i.e. sleeping rooms).
• The water temperature in the supply radiator-/boiler circuit should be at
 least10Khigherthanintheoorheatingsupply.
• The maximum length of each pipe must not be longer than 100 m for
 oorheatingdesignwithspreadof10Kwhenusingpipes12mmi.d.
(i.e. pipe 16x2). Smaller diameter pipe results in a shorter pipe length.
• BM mini KF: Assemble the thermostatic head and mount the
sensor in an appropriate position in the room and
    about1,7mabovetheoor.Useavacantpipeif
possible.
• BM mini RT: Wiring of the electrical actuator and the room
thermostat
BM mini KR: onlybyaqualiedelectrician.
Hydraulic connection of two-pipe systems
Bypass valve closed.
Allen key 2,5mm.

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Installation and operation manual BM mini
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Filling of the system
Itismandatorytoushtheoorheatingloopsbeforeputtingthesystem
in operation, because otherwise malfunction or damage to the pump may
result.WerecommendusingtwollvalvesontheprimarysideoftheBM
miniasshowninpicture2.Alternatively,thesystemcanbelledusingll
valves installed elsewhere in the system. In any case, it is necessary to
positivelyushthesystemsinceotherwisetheairinthesystemwillnotbe
purged completely. Filling the system via the integrated manual air vent
(see picture 7) is not possible! Please observe the position of the ball valve
inthebypass.Ifthisisintheverticalposition,theoorheatingloopsare
hydraulically uncoupled from the boiler loop. This position is ideal for nor-
mal operation (see picture 1) since the pump in the heating loop does not
inuencetheoorheatingloop.Withthevalveinthisposition,however,the
oorheatingsystemcannotbelledfromtheprimaryside.
Tolltheoorheatingloopsfromtheheatingloopside,thisballvalvemust
beclosed(horizontal)–seepictures2through6.Afterlling,thevalve
mustbeopenedagain(verticalposition).Pleaseobservethatwhenlling
from the primary side radiator valves on that side should be closed in order
tohavemaximumpumppressureavailableforpurgingtheoorheating
loops.

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Installation and operation manual BM mini
! ! !
Normal operation. Ball valve position open (vertical)
!!!
Recommendedllingofthesystem.Twollvalvesontheprimarysideofthe
BMminiallowforaneasyllingandpurgingofairintheoorheatingloops.
The ball valve position must be closed (horizontal).
Picture 1
Picture 2

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Installation and operation manual BM mini
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! ! !
Goodllingoption.Twoexistingllvalvesontheprimarysideallowforgood
llingandairpurging.Theballvalvepositionmustbeclosed(horizontal).
! ! !
Possiblellingoption,albeitalittlecomplicated.Onellvalveontheprimary
owsideallowsforllingandairpurging.Theintegratedballvalvemustbe
closed (horizontal). Caution:TheoorheatingreturnattheBMminimustbe
closedduringthelloperation.Fillingawallheatingloopisimpossibleinthis
way.
Picture 3
Picture 4

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Installation and operation manual BM mini
!!!
Possiblellingoption,albeitalittlecomplicated.Onellvalveontheprimary
returnsideallowsforllingandairpurging.Theintegratedballvalvemustbe
closed (horizontal). Caution:TheoorheatingowattheBMminimustbe
closedduringthelloperation.Fillingawallheatingloopisimpossibleinthis
way.
Picture 5

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Installation and operation manual BM mini
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!!!
Thedirectionofowshownisonlypossibleifthereisnocheckvalve
installed at the primary heating circulator. If a check valve is present,
llinginaccordancewithpicture3isrecommended.
Picture 6

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Installation and operation manual BM mini
Fillingthesysteminthiswayisimpossiblesincenoforcedushingcanbe
assured.
Picture 7

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Installation and operation manual BM mini
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Starting of operation without given values
1. Remove protection cap / or thermostatic head / or electric drive from the
BM mini (see page 14, picture 1).
2. Increase the supply temperature from the radiator-/boiler circuit to the
designed value (normally 55-60°C).
3. To perform the adjustment check, the room temperature has to be
at least 20°C. If it is not, the system has to be run until the temperature
increases.
4. Checktheoorheatingsupplytemperature.Itshouldbeabout35-40°C.
 Ifitistoohigh,theowfromtheprimarysupplyhastobeadjusted
(reduced), see page 14 picture 3.
The BM mini will be delivered from factory with fully opened mixing
valve. We recommend an adjustment in small steps (1/2 turn). After
 eachadjustmenttheoorheatingsupplytemperatureshouldbe
checked after an appropriate waiting period.
Hydraulic connection of one-pipe systems
This pipe system is not longer standard. Connection scheme on request.

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Installation and operation manual BM mini
Starting of operation with given values (pre-setting)
E.g. Given values:
Heatrequirementofunderoorheatingsystem 2000W
Supply temperature of radiator-/boiler system 70°C.
Returntemperatureofunderoorheatingsystem 40°C
Difference pressure of the radiator-/boiler circuit 10 kPa
Specicheatcapacityofwater 1,163W/(Kg x K)
Wanted values:
Flow from the radiator-/boiler circuit =
m = Q/(c x dT) = 2000 W / (1,163 W/(kg x K) x 30 K) = 58 l/h
Pre-setting:
If the difference pressure from the radiator-/boiler circuit at the inlet and
outletoftheBMminiis10kPaandtheowrequirementoftheBMminiis
about 60 l, the mixing valve pre-setting has been opened by 1,6 turns.
Turns to open N

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Installation and operation manual BM mini
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1. 2.
3. 4.
0
Remove protection cap Remove valve insert
Use enclosed tool to adjust
the pre-setting of the mi-
xing valve
Screw valve insert in again
Room Temperature Setting
(approx. values for BM mini KF only)
1 3 5 6 7 8 9
*
6°C 10°C 14°C 18°C 20°C 22°C 24°C 26°C

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Installation and operation manual BM mini
Assembling of wall bracket
The BM mini can be mounted to the wall bracket with radiator-/boiler
connections to the left of to the right side. The screws for the mounting of
the BM mini to the wall bracket are enclosed.
Installation of the BM mini only with horizontal pump. Mixing valve and
venting device have to show upwards.
For a silencing of the sound the enclosed rubber bumpers have to be used
between mounting bracket and wall, or - if mounted in a cabinet - between
mountingbracketandxationrails.

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Installation and operation manual BM mini
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Dimensional drawing
Pump curve
265mm
Depth 90 mm

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Installation and operation manual BM mini
230 V~
230 V~
Black
brown
blue
green/yellow
230 V~
Room-stat
Laing
RTS
1
3
Pump
Electrical connection BM mini KF

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Installation and operation manual BM mini
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Electrical
actuator
Room-stat
Laing
RTS
1
3
230 V~
Electrical
actuator
Pump
Room-stat
Laing
RTS
1
3
230 V~
Electrical connection BM mini RT -
continuous operating of pump
Electrical
actuator
Room-stat
Laing
RTS
1
3
230 V~
Electrical
actuator
Pump
Room-stat
Laing
RTS
1
3
230 V~
Electrical connection BM mini RT -
pump also switched off by room thermostat

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Installation and operation manual BM mini
230 V~
230 V~
Black
brown
blue
green/yellow
230 V~
Room-stat
Laing
RTS
1
3
Pump
Electrical connection BM mini KR -
continuous operating of pump
Electrical connection BM mini KR -
pump also switched off by room thermostat
230 V~
black
brown
blue
green/yellow
230 V~
Room-stat
Laing
RTS 1
3

300307 The company reserves the right to make technical alterations!
Laing have been active since 1950 in the research and the development
of pumps and heating products. More than 1000 patents have been
registered world wide. The original R&D institute located in Southern
Germany has over the years evolved into an international company with
additional locations in the US, Japan and Hungary and with worldwide
nearly 500 employees. Today, our production range includes:
Pumps (shaftless spherical motor pumps) Heating controls

Floor heating system connection Electrical heaters

Special OEM-products
Weareyourexibleandcompetentpartnerforpumpsandheating
products. Try the high standard of our quality production.
About us
Laing GmbH · Systeme für Wärmetechnik
Klingelbrunnenweg 4 · D-71686 Remseck - Germany · Phone: [phone]
Fax: [phone] · E-Mail: [email protected] · Internet: www.laing.de