STIEBEL ELTRON MSMW User manual

MSMW, MSMS
Mixer and swimming pool module
for central heating heat pumps
Operating and installation instructions

2
Important information
Installation, initial commissioning and
maintenance of this unit shall only be carried
out by a qualified installer in accordance with
these instructions.
Incorrectly executed work creates
dangers for life and limb.
Installation instructions
Operating instructions 3
1 Equipment overview 3
1.1 Equipment description 3
1.2 Operating and installation instructions 3
1.3 Maintenance and care 3
1.4 Operation 4
2 Settings 5
2.1 Operating modes (control level 1) 5
2.2 Equipment menu (control level 2) 6
2.3 Remote control FE 7 11
Installation instructions 12
1 Standard delivery 12
2 Wall mounting 12
3 Control panel installation 12
4 Electrical connection 12
4.1 Power cables 12
4.2 Fuses/MCBs 12
4.3 Power supply 12
4.4 Temperature sensors 12
4.5 Positioning the temperature sensors 13
4.6 Circulation pumps and mixers 13
4.7 BUS connection 13
4.8
Remote control FE 7 connection array 13
4.9 MSMW connection array 14
4.10 MSMS connection array 15
5 Commissioning 16
5.1 Supplement to the BUS initialisation 16
5.2 System configuration 16
5.3 Reset options MSM 16
5.4 Commissioning overview 17
5.5 Commissioning in detail 17
5.6 Commissioning report 20
5.7 Specification 20
5.8 Standard settings 21
5.9 Individual settings 21
6 Troubleshooting 21
Guarantee 22
Environment and recycling 22
Risk of injury
Where children or persons with
limited physical, sensory or mental capa-
bilities are to be allowed to control this
appliance, ensure that this will only happen
under supervision or after appropriate in-
structions by a person responsible for their
safety.
Children should be supervised to ensure
that they do not play with the appliance.

3
1.1 Equipment description
The mixer and swimming pool module MSM
is available in two versions, namely as control
panel model MSMS and as wall mounted
model MSMW with casing. A BUS cable is
routed on site between the MSM and the WPM
II, that enables the communication between
both devices.
The MSM is used in heat pump systems with
a second mixer circuit (H3), and/or in systems
with more than two heat pumps and/or for
one swimming pool regulating.
The MSM can also be used as an independent
mixer controller. In that case there is no
communication with the WPM II. The MSM is
operated just like the WPM II.
Heating the swimming pool water with the
MSM can only work in conjunction with the
WPM II.
There are two possible system configurations:
– operation with a swimming pool water
sensor or
– operation with a separate power supply for
the swimming pool operation.
In both cases there is a higher starting
condition: The first starting condition is met
as soon as the swimming pool water heating
program is enabled .
The second starting condition that must
be met depends on whether the system is
operated with a swimming pool water sensor
Operating instructions for users and contractors
1 Equipment overview
or with a separate power supply for swimming
pool operation. The primary and secondary
pump are started as soon as the swimming
pool water heating commences. In addition,
the buffer cylinder is regulated to a fixed
value.
The fault output of the MSM is switched
as soon as the heat pump is permanently
switched OFF. This is indicated on the display
by a flashing warning symbol.
A permanent shutdown occurs if five heat
pump faults occur in a two hour run.
Summary of available functions
zThe communication with the WPM II takes
place via a three-wire BUS cable
zControl of a second independent mixer
circuit
zControl of four additional heat pumps with
buffer cylinder primary pumps
zIntegral swimming pool water control
z7-day program for selecting the heating
and setback times
zStand-alone mixer control with an
independent outside temperature sensor
(this requires no BUS connection to the
WPM II)
1.2 Operating and installation
instructions
In accordance with the respective system, the
installation and operating instructions for the
system‘s components must also be observed.
Keep these operating and installation
instructions safely and pass them on to any
new user, should the equipment change
hands, and let your contractor check their
content in conjunction with any maintenance
and repair work.
1.3 Maintenance and care
Maintenance work, e.g. checking the
electrical safety, must only be carried out by
qualified personnel. Protect the equipment
from the ingress of dust and dirt during
building work.
A damp cloth is all you need to care for the
plastic parts. Do not use abrasive or corrosive
cleaning agents!
B
C
FD
E
A
A Display
B Rotary selector
C Rotary selector Reset / Auto
D Programming key
E Programming control indicator
F Programming flap (open)
System status display
1 Mixer opens
2 Mixer closes
3 Circulation pump, heating circuit 3
"mixer circuit"
4 Circulation pump, swimming pool
5 Buffer cylinder primary pump 3
6 Buffer cylinder primary pump 4
7 Buffer cylinder primary pump 5
8 Buffer cylinder primary pump 6
9 System parameter
5
6
7
8
9
1
2
3
4
C26_03_01_0762
Roomtemp. 3
Day / clock
Holiday / Partyprog.
Info Temp.
Heating curve
Heating prog.
Sw. pool temp.
Sw. pool prog.
First start-up
C26_03_01_0762
ROOMTEMP HC3

4
1.4 Operation
The operation is split over three control
levels. Control levels 1and 2are accessible to
users and contractors alike. Control level 3is
reserved for contractors.
Control level 1 (control flap closed)
At this level parameters such as standby
mode, programmed operation, constant day
or setback mode, etc. can be adjusted (see
section 2.1).
Control level 2 (control flap open)
At this level parameters such as room
temperature, DHW temperature, heating
programs, etc. can be adjusted (see section
2.2).
Control level 3 (for contractors only)
This level is protected by a code and should
only be used by contractors. At this level,
heat pump and system-specific details are
determined (see chapter 5 of the installation
instructions).
Vital facts in brief
Settings
All settings follow the same pattern:
Opening the control flap toggles the manager
into programming mode.
An indicator symbol is shown at the
bottom of the display at system parameter
Room t HC 1.
Turning the rotary selector allows you to
move the indicator to the system parameter
you want to change.
Press to change the value of the system
parameter. Whenever the red indicator
above illuminates, you can modify the
current value by turning the rotary selector
. Press again; the indicator then
extinguishes and the new set value has
been saved. You can modify further values
for this parameter by continued pressing
of , if the red indicator has not been
extinguished above . The programming
step can only be terminated when the red
indicator has extinguished.
Terminating programming
You can terminate the process after entering
and saving the required parameter changes
by closing the control flap.
However, if you want to make further
changes, turn the rotary selector until the
display shows BACK, then press . This will
return you to the previous level.
Closing the control flap with indicator above
on returns the manager to its original
position. The modified value will then not
be saved.
During commissioning, a system
check will be implemented, e.g.
all sensors that are currently connected
are displayed upon request. Sensors not
connected before the system went 'live'
are not registered by the manager and are
therefore not displayed. The indicator symbol
skips that parameter.
Example: The system parameter's heating
curve and heating program are skipped if
the mixer sensor was not connected during
commissioning. Values for these parameters,
therefore, cannot be programmed.

5
Display (including all elements)
Swimming pool operation
Constant setback mode
Constant day mode
Automatic mode
Standby mode
Fault message (flashing)
14-digit plain text display
Heating times for central heating and swimming pool water (black)
Switching pairs for central heating and swimming pool water operation
Day mode for heating circuit 3
Setback mode for heating circuit 3
C26_03_01_0763
2 Settings
2.1 Operating modes (control level
1)
The operating modes are changed by turning
the rotary selector with the control flap
closed.
Standby mode
The control unit is switched OFF, but is
still 'live'; frost protection is enabled, and
the swimming pool function is switched
OFF. The operating mode was defaulted
by the WPM II if the indicator flashes.
Application: Holidays.
Automatic mode
Heating according to time switch
program:
Changeover between day temperature
and setback temperature.
The swimming pool function is enabled.
The remote control is effective.
Application: Central heating and
swimming pool water heating.
Constant day mode
The mixer circuit is constantly held at day
temperature.
The swimming pool function is enabled.
Application: Low energy houses without
setback mode.
Constant setback mode
The mixer circuit is constantly held at
setback temperature.
The swimming pool function is enabled.
Application: Weekends away.
Swimming pool operation
The swimming pool function is enabled.
Frost protection is activated for heating
operation.
Application: The heating season has
ended; only the swimming pool water
should be heated.
Fault message (flashing)
Indicates faults in the heat pump system.
Notify your local contractor.

6
With the ROOM T parameter you can select the set room temperature for the day and setback
mode of heating circuit 3.
The actual room temperature can also be scanned, as soon as the FE 7 remote control has been
connected and allocated to the heating circuit.
With the Swim pool T parameter you can select the set temperature for swimming pool water
heating.
With the time/date parameter you can set the clock and define the summer time.
At the factory, summer time is set to begin on the 25 March and to end on the 25 October.
The Holiday prog parameter puts the heat pump system into setback mode.
The Party prog parameter allows you to extend the day mode by a few hours.
The Htg curve parameter enables one heating curve to be set up for heating circuit 3. The room
temperature will only remain constant, irrespective of the outside temperature, if the correct
heating curve has been selected for the relevant type of building. Selecting the correct heating
curve is therefore vitally important.
The Htg prog parameter enables the associated heating programs to be set up for heating circuit
3.
In the Swim pool prog parameter you can select the times for the swimming pool operation.
The Temperatures parameter enables you to scan the sensor temperatures for the heat pumps or
the heat pump systems, comparing set with actual values.
During START UP you need to not only determine the settings of control level 2, but also the
system-specific parameters. These parameters are adjusted at control level 3, access to which is
protected by code.
Check all parameters in sequence.
Enter all selected values into the column (system value) provided in the commissioning report.
2.2 Equipment menu (control level 2)
Select the required parameter with the rotary selector.
ROOMTEMP HC3
time/date
HOLIDAY/PARTY
TEMPERATURES
HEATING CURVES
HEATING PROG
FIRST START UP
Swim pool t
Swim pool prog

7
Room temperature HC 3
With the Room t parameter you can select
the set room temperature for the day and
setback mode of heating circuit 3. Changing
this parameter results in a parallel offset of the
heating curve.
The actual room temperature can also be
scanned, as soon as the FE 7 remote control
has been connected and allocated to heating
circuit 3.
Open the control flap.
Settings at control level 2 for users and contractors
Time and date
With the time/date parameter you can set the
clock and define the summer time.
At the factory, summer time is set to begin on
the 25 March and to end on the 25 October.
Open the control flap.
Setting the time
or
Summer time
ROOMTEMP HC3
SET ROOM T-DAY
SET ROOM T-DAY
SET ROOM T-ngt
SET ROOM T-ngt
ACTUAL ROOM T
ROOMTEMP HC3
BACK
TIME/DATE
day
SET CLOCK TIME/DATE
TIME
TIME
SET CLOCK
YEAR
MONTH
BACK

8
Holiday and party program
In Holiday mode, the heat pump system
operates in setback mode; holiday mode is
displayed with the flap closed. For the start
of the holidays, the year, month and day are
entered; also enter the year, month and day
for the end of the holidays. The start and end
time is always 24:00 h of the date entered.
After the holiday period has expired, the heat
pump system operates again in accordance
with the previous central heating and
swimming pool water program.
In Party mode, you can extend the day mode
for central heating by a few hours. This is
displayed with the flap closed.
If, for example, the heating program normally
switches to setback mode at 22:00 h, and you
set the party mode to two hours, then setback
mode would only begin at 24:00 h.
Open the control flap.
Temperatures
The Temperatures parameter enables
you to scan the sensor temperatures of
the swimming pool system comparing set
with actual temperatures. The following
temperatures can be scanned.
– Outside temperature
– Actual room temperature (HC3)
(will only be displayed if the remote control
FE 7 is connected)
– Actual room temperature (H3)
– Actual mixer temperature (HC3 flow)
– Set mixer temperature (HC3 flow)
– Actual pool temperature
– Set pool temperature
– Actual return temperature
– Fixed pool temperature
Note
Actual or set temperatures will not be
displayed, if the corresponding sensor is not
connected. See system designs on page 22.
Open the control flap.
BACK
BACK
HOL-PARTY
HOL-PARTY
HOLIDAY
Year BEGIN
MONTH BEGIN
day BEGIN
HOLIDAY
Year end
MONTH end
day end
TEMPERATURES
TEMPERATURES
OUTSIDE

9
Heating curves
The Htg curve parameter enables one
heating curve to be set up for heating circuit
3. Selecting the correct heating curve is vitally
important.
Note: Your contractor will have set up a
building and system-specific optimum heating
curve for heating circuit 3. For heating circuit 3
it relates to the mixer flow temperature.
When adjusting the heating curve on the
MSM, the calculated set flow temperature, that
is subject to the outside temperature and the
set room temperature, will be shown at the
top of the display.
Bezogen auf +20 °C
Außentemperatur
Bezogen auf 0 °C
Außentemperatur
Bezogen auf -20 °C
Außentemperatur
Tag-Betrieb Heizkreis 1
Bezogen auf +20 °C
Außentemperatur
Bezogen auf 0 °C
Außentemperatur
Bezogen auf -20 °C
Außentemperatur
Absenk-Betrieb
26_03_01_0076
Heating curve diagram
At the factory, heating curve 0.2 is selected for heating circuit 3.
The heating curve relates to a set room temperature of 20 °C.
C26_03_01_0077
1,5
2
1,2
1
0,6
0,4
0,2
2,53
20 18 16 14 12 10
8 6 4 2 0
-2 -4 -6 -8
-10 -12 -14 -16 -18 -20
100
80
60
40
20
Außentemperatur [°C]
Heizkreis 2 WP-Vorlauftemperatur [°C] Heizkreis 1 WP-Rücklauftemperatur [°C]
0,8
20 18 16 14 12 10
8 6 4 2 0
-2 -4 -6 -8
-10 -12 -14 -16 -18 -20
Außentemperatur [°C]
70
60
50
40
30
20
Tag-Betrieb
Absenk-Betrieb
Rücklauf- / Vorlauftemperatur [°C]
20 18 16 14 12 10
8 6 4 2 0
-2 -4 -6 -8
-10 -12 -14 -16 -18 -20
Außentemperatur [°C]
Rücklauf- / Vorlauftemperatur [°C]
70
60
50
40
30
20
geänderte Heizkurve
Adjustment of programmed changeover between day and setback mode
The figure shows a standard heating curve with a slope of 0.8, relative to a set room
temperature for day mode of 20 °C. The lower curve represents the setback curve. For this, the
set room temperature for setback mode of 15 °C is used, in other words the heating curve is
subject to a parallel offset.
Matching a heating curve to actual conditions
Example:
During spring and autumn, the flow temperature of a heating system is too low at an
outside temperature between 5 and 15 °C, but is OK at outside temperatures of d0 °C.
This problem can be remedied with a parallel offset and a simultaneous reduction of the
heating curve.
Prior to this adjustment, heating curve 1.0 was selected relative to a set room temperature
of 20 °C. The dotted line indicates the modified heating curve at 0.83 and a modified set
room temperature at 23.2 °C.
C26_03_01_0078
C26_03_01_0079
Heating circuit 3 Flow temperature [°C]
Based on 20 °C
outside temp.
Based on 0 °C
outside temp.
Based on -20 °C
outside temp.
Based on 20 °C
outside temp.
Based on 0 °C
outside temp.
Based on -20 °C
outside temp.
Day mode Heating circuit 1
Set back mode
Outside temperature °C
Outside temperature °C
Day mode
Setback mode
Flow temperature [°C]
Flow temperature [°C]
Outside temperature °C
Modified heating curve
back
HTG CURVE
HTG CURVE

10
Heating programs
The Htg prog parameter enables the
associated heating programs to be set up for
heating circuit 3.
You can adjust your heating system as follows:
– for each individual day of the week
(Monday, ..., Sunday)
– Monday to Friday (Mo - Fr)
– Saturday and Sunday (Sa - Su)
– the whole week (Mo - Su)
You can select three switching time pairs
(I, II, III) for each of the above options.
This determines when and how often the heat
pump system should heat in day mode. At all
other times, the heat pump operates in setback
mode. You will already have selected the
corresponding set values for day and setback
mode under parameter Room t HC3.
Example:
For the heating circuit, your heating system
should operate daily from Monday to Friday
at two different times, i.e. from 05:30 h until
08:30 h as well as from 14:00 h until 22:00 h.
At the weekend, your heating system should
provide heat from 08:30 h until 21:00 h.
Open the control flap.
BACK
MON-FRI
HTG PROG
HEAT CIRCUIT 3
HTG PROG
back
SAT-SUN
SAT-SUN
HEATING STOP
HEATING STOP
HEATING STart
HEATING STart
HEATING STart
HEATING STOP
HEATING STart
HEATING STart
HEATING STart