STIEBEL ELTRON HM Trend Instruction Manual

OPERATION AND INSTALLATION
Hydraulic module for heat pumps
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» HM Trend
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» HMS Trend

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CONTENTS | SPECIAL INFORMATION
SPECIAL INFORMATION
OPERATION
1. General information �����������������������������������������3
1.1 Relevant documents_____________________________________________ 3
1.2 Safety instructions_______________________________________________ 3
1.3 Other symbols in this documentation _______________________ 3
1.4 Units of measurement __________________________________________ 3
2. Safety����������������������������������������������������������3
2.1 Intended use______________________________________________________ 3
2.2 General safety instructions ____________________________________ 3
2.3 Test symbols ______________________________________________________ 4
3. Appliance compatibility �������������������������������������4
4. Appliance description ���������������������������������������4
4.1 WPM heat pump manager _____________________________________ 4
5. Maintenance and care ���������������������������������������4
6. Troubleshooting ����������������������������������������������4
INSTALLATION
7. Safety����������������������������������������������������������5
7.1 General safety instructions ____________________________________ 5
7.2 Instructions, standards and regulations ____________________ 5
8. Appliance description ���������������������������������������5
8.1 Standard delivery________________________________________________ 5
8.2 Accessories________________________________________________________ 5
9. Installation����������������������������������������������������5
9.1 General information_____________________________________________ 5
9.2 Removing the appliance cap __________________________________ 5
9.3 Minimum clearances____________________________________________ 6
9.4 Wall mounting____________________________________________________ 6
9.5 Hydraulic connection ___________________________________________ 7
9.6 Filling the system________________________________________________ 8
9.7 Venting the appliance___________________________________________ 8
9.8 Safety valve _______________________________________________________ 9
10. Power supply �������������������������������������������������9
10.1 Electric emergency/booster heater _________________________ 10
10.2 Control voltage __________________________________________________ 10
10.3 WPM heat pump manager ____________________________________ 11
10.4 Sensor installation______________________________________________ 12
10.5 Connecting external components ___________________________ 13
10.6 Fitting the appliance cap______________________________________ 13
11. Commissioning ��������������������������������������������� 14
11.1 Check before commissioning the heat pump manager _ 14
11.2 Appliance handover ____________________________________________ 14
12. Troubleshooting �������������������������������������������� 15
12.1 Resetting the high limit safety cut-out _____________________ 15
13. Maintenance ������������������������������������������������ 15
14. Specification ������������������������������������������������ 16
14.1 Dimensions and connections _________________________________ 16
14.2 Wiring diagram HM | HM Trend______________________________ 18
14.3 Wiring diagram HMS | HMS Trend __________________________ 20
14.4 Data table ________________________________________________________ 22
GUARANTEE
ENVIRONMENT AND RECYCLING
SPECIAL INFORMATION
- The appliance may be used by children aged8
and older and persons with reduced physical,
sensory or mental capabilities or a lack of ex-
perience and know-how, provided that they are
supervised or they have been instructed on how
to use the appliance safely and have understood
the resulting risks. Children must never play with
the appliance. Children must never clean the ap-
pliance or perform user maintenance unless they
are supervised.
- The connection to the power supply must be in
the form of a permanent connection. Ensure the
appliance can be separated from the power sup-
ply by an isolator that disconnects all poles with
at least 3mm contact separation.
- In the event of damage to the power cable this
must always be replaced by a qualified contractor
authorised by the manufacturer, using original
spare parts.
- Fix the appliance in position as described in
chapter "Installation/ Preparations".
- Observe the minimum and maximum water
inlet pressure (see chapter "Specification/ Data
table").
- We recommend regular inspection (to establish
the current condition of the system), and main-
tenance by a qualified contractor if required (to
return the system to its original condition).

OPERATION
General information
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OPERATION
1. General information
The chapters "Special Information" and "Operation" are intended
for both the user and qualified contractors.
The chapter "Installation" is intended for qualified contractors.
Note
Read these instructions carefully before using the appli-
ance and retain them for future reference.
Pass on the instructions to any new user where appro-
priate.
1.1 Relevant documents
WPM operating instructions
WPM commissioning instructions
Operating and installation instructions for the connected
heat pump
Operating and installation instructions for all other com-
ponents in the system
1.2 Safety instructions
1.2.1 Structure of safety instructions
!
KEYWORD Type of risk
Here, possible consequences are listed that may result
from failure to observe the safety instructions.
 Steps to prevent the risk are listed.
1.2.2 Symbols, type of risk
Symbol Type of risk
Injury
Electrocution
1.2.3 Keywords
KEYWORD Meaning
DANGER Failure to observe this information will result in serious
injury or death.
WARNING Failure to observe this information may result in serious
injury or death.
CAUTION Failure to observe this information may result in non-seri-
ous or minor injury.
1.3 Other symbols in this documentation
Note
General information is identified by the adjacent symbol.
 Read these texts carefully.
Symbol Meaning
Material losses
(appliance damage, consequential losses and environmen-
tal pollution)
Appliance disposal
 This symbol indicates that you have to do something. The ac-
tion you need to take is described step by step.
1.4 Units of measurement
Note
All measurements are given in mm unless stated oth-
erwise.
2. Safety
2.1 Intended use
Observe the operating limits listed in chapter "Specification".
This appliance is intended for domestic use. It can be used safely
by untrained persons. The appliance can also be used in a non-do-
mestic environment, e.g. in a small business, as long as it is used
in the same way.
Any other use beyond that described shall be deemed inappropri-
ate. Observation of these instructions and of instructions for any
accessories used is also part of the correct use of this appliance.
2.2 General safety instructions
- The electrical installation and installation of the heating cir-
cuit must only be carried out by a recognised, qualified con-
tractor or by our customer support engineers.
- The qualified contractor is responsible for adherence to
all currently applicable regulations during installation and
commissioning.
- Operate the appliance only when fully installed and with all
safety equipment fitted.
- Protect the appliance from dust and dirt ingress during
building work.
!
WARNING Injury
The appliance may be used by children aged 8 and older
and persons with reduced physical, sensory or mental
capabilities or a lack of experience and know-how, pro-
vided that they are supervised or they have been in-
structed on how to use the appliance safely and have
understood the resulting risks. Children must never play
with the appliance. Children must never clean the ap-
pliance or perform user maintenance unless they are
supervised.
!
!

OPERATION
Appliance compatibility
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!
WARNING Injury
 For safety reasons, only operate the appliance with
the casing closed.
2.3 Test symbols
See type plate on the appliance.
3. Appliance compatibility
The appliance can be operated in conjunction with the following
air | water heat pumps:
- HPA-O 3-8 CS Plus
- HPA-O 7-13 (C)(S) Premium
- WPL 13/18 E, WPL 13/18 cool
- WPL 15-25 A(C)(S)
- WPL 33 HT(S)
- WPL 07-17 ACS classic
- WPL 19-24 I, A
4. Appliance description
The appliance is a hydraulic module for air/water heat pumps
installed outdoors and is installed by wall mounting inside the
thermal envelope of the building. Connection to the water side
of the appliance is from below. Connections are provided on the
appliance for the heat pump flow, the heating system flow and
for the heat exchanger for DHW heating. A further connection is
intended for the drain hose from the safety valve.
The following are integrated into the appliance: a diaphragm ex-
pansion vessel with 24litre capacity, a high efficiency [HE heating
circuit pump sized in line with heating output, an electric emer-
gency/booster heater and a WPM heat pump manager.
Particular feature of the HM(S) with ASL-HM
The ASL-HM connector block is equipped with additional connec-
tions for the heat pump return, the heating system return and the
return from the heat exchanger for DHW heating. In addition, the
connections are equipped with ball shut-off valves to facilitate
installation.
4.1 WPM heat pump manager
The heat pump manager is responsible for the processes that
control and regulate the heat pump.
5. Maintenance and care
!
Material losses
Maintenance work, such as checking the electrical safety,
must only be carried out by a qualified contractor.
A damp cloth is all you need to care for the plastic parts. Never
use abrasive or corrosive cleaning agents.
We recommend regular inspection (to establish the current con-
dition of the system), and maintenance by a qualified contractor
if required (to return the system to its original condition).
6. Troubleshooting
If you cannot remedy the fault, notify your qualified contractor.
To facilitate and speed up your enquiry, please provide the serial
number from the type plate. The type plate is located at the front
top, on the right or left hand side of the casing.
Sample type plate
Montageanweisung beachten! Dichtheit geprüft! Made in Germany
*xxxxxxxxxxxxxxxxxx*
1
26_03_01_1570
1 Number on the type plate

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INSTALLATION
Safety
INSTALLATION
7. Safety
Only a qualified contractor should carry out installation, commis-
sioning, maintenance and repair of the appliance.
7.1 General safety instructions
We guarantee trouble-free function and operational reliability only
if original accessories and spare parts intended for the appliance
are used.
7.2 Instructions, standards and regulations
Note
Observe all applicable national and regional regulations
and instructions.
8. Appliance description
8.1 Standard delivery
The following are delivered with the appliance:
- 4 double ended screws with rawl plugs, washers and nuts
- 3TAF PT immersion/contact sensor
- 1 AFPT outside sensor
- Installation template
8.2 Accessories
- Connector block ASL-HM
9. Installation
9.1 General information
Note
We do not recommend installing the appliance in wet
rooms. Wet rooms include rooms used, for example, for
washing or drying clothes.
To protect the appliance against damage it should be transported
to the installation location in its original packaging.
Install the appliance in a suitable location close to the heat pump.
Ensure that the wall structure can bear the weight of the appliance
before securing the appliance to the wall.
The wall on which the appliance is to be mounted must be even.
Once mounted, the appliance cap must seal the appliance without
gaps.
 Use spacer discs to compensate for any unevenness.
!
Material losses
 Always fit the appliance cap when interrupting in-
stallation work for any length of time.
9.2 Removing the appliance cap
HM(S) | HM(S) Trend
D0000041457

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INSTALLATION
Installation
ASL-HM
D0000041458
9.3 Minimum clearances
HM(S) | HM(S) Trend without ASL-HM
≥150
≥1000
≥70
≥400
D0000041600
 Maintain the minimum clearances to enable maintenance
work on the appliance.
If the appliance is not installed in a recess, we recommend
leaving 400mm clearance on the right-hand side for the
electrical connection.
HM(S) | HM(S) Trend with ASL-HM
≥150
≥1000
≥400
≥70
D0000041599
 Maintain the minimum clearances to enable maintenance
work on the appliance.
If the appliance is not installed in a recess, we recommend leav-
ing 400mm clearance on the right-hand side for the electrical
connection.
9.4 Wall mounting
General
164
D0000042865
 Position the installation template horizontally at the required
installation location. The installation template can be found
in the cardboard box.
 Mark the holes on the wall. Please note that the bottom two
holes are only required in combination with the ASL-HM.
 Drill the holes.
 Insert suitable rawl plugs into the holes.
 Turn the double ended screws into the rawl plugs.
HM(S) | HM(S) Trend without ASL-HM
D0000041461
 Place the appliance onto the double ended screws, followed
by the washers provided. Secure the appliance with the cor-
responding nuts.

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INSTALLATION
Installation
HM(S) | HM(S) Trend with ASL-HM
First mount the ASL-HM connector block on the wall.
D0000041460
1
2
3
1 Appliance
2 Connector block
3 Gaskets
 Place the connector block onto the double ended screws, fol-
lowed by the washers provided. Secure the connector block
with the corresponding nuts.
 Place the appliance onto the double ended screws, followed
by the washers provided. Secure the appliance with the cor-
responding nuts.
 Connect the appliance to the connector block. Do not forget
the gaskets.
9.5 Hydraulic connection
!
Material losses
The heating system to which the appliance is connected
must be installed by a qualified contractor in accordance
with the water installation drawings that are part of the
technical guides.
!
Material losses
For appliances with connector block or when fitting ad-
ditional shut-off devices, install a further safety valve in
an accessible location on the heat generator itself or in
the flow line in close proximity to the heat generator.
There must be no shut-off valve between the heat gen-
erator and the safety valve.
D0000059862
12
1 Heating flow
2 Heat exchanger flow
Note
If the appliance is used without a DHW cylinder, install
a tee.
 Link connections “Heating flow” and “Heat exchang-
er flow” with a tee.
 Insulate the pipes with insulating material. To prevent air
from entering, ensure that the pipes are sealed up to the ap-
ertures in the casing.

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INSTALLATION
Installation
9.6 Filling the system
9.6.1 General information
!
Material losses
Never switch on the power before filling the system.
!
Material losses
High flow rates or water hammer can damage the ap-
pliance.
 Fill the appliance at a low flow rate.
In the delivered condition, the diverter valve of the MFG is posi-
tioned at the centre, enabling the heating and DHW circuits to be
filled evenly. If power is switched on, the diverter valve automat-
ically moves into the central heating position.
If you intend filling or draining the system later, first place the
diverter valve into its centre position.
For this, enable controller parameter DRAIN HYD in the DIAGNO-
SIS/ RELAY TEST SYSTEM menu.
9.6.2 Determine the fill pressure
The diaphragm expansion vessel installed in the appliance has a
volume of 24 litres. The pre-charge pressure P0 is 1.5 bar.
If the height difference ∆h between the highest point of the heat-
ing system and the diaphragm expansion vessel is no more than
13 m, the diaphragm expansion vessel can be used without any
changes being required.
 Fill the heating system at a pressure of at least 1.8 bar (P0
+ 0.3 bar). Observe the safety valve’s response pressure of 3
bar.
If the height difference between the highest point of the heating
system and the diaphragm expansion vessel is more than 13 m,
the pre-charge pressure needs to be adapted.
 Calculate the pre-charge pressure:
P0 = ∆h
10 + 0,2 bar
D0000081230
 Note that the heating system fill pressure increases
accordingly.
 Check whether a further external diaphragm expansion ves-
sel needs to be installed.
 Fill the heating system at the appropriate pressure (P0 + 0.3
bar). Observe the safety valve’s response pressure of 3 bar.
9.7 Venting the appliance
Multifunction assembly (MFG)
D0000041463
1
1 Air vent valve
 Vent the pipework by pulling up the red cap on the air vent
valve.
 Close the air vent valve after the venting process.
9.7.1 HM(S) | HM(S) Trend with ASL-HM
Heating circuit
D0000041462
1
1 Air vent valve
 Vent the heating circuit at the ASL-HM connector block.

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INSTALLATION
Power supply
9.8 Safety valve
D0000042471
1
3
2
1 Drain hose
2 Fixing
3 Drain
 Size the discharge outlet so that water can drain off unim-
peded when the safety valve is fully opened.
 Ensure that the drain hose of the safety valve is open to the
outside.
 Install the drain hose of the safety valve with a constant fall
to the drain. When installing the drain, never kink the drain
hose.
 Secure the drain hose by suitable means, to prevent any hose
movement in the event of water being discharged.
10. Power supply
WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with national and regional regulations.
WARNING Electrocution
The connection to the power supply must be in the form
of a permanent connection. Ensure the appliance can
be separated from the power supply by an isolator that
disconnects all poles with at least 3mm contact separa-
tion. This requirement can be met with contactors, circuit
breakers, fuses/MCBs, etc.
WARNING Electrocution
 Before working on the appliance, isolate it from the
power supply at the control panel.
Note
The specified voltage must match the mains voltage. Ob-
serve the type plate.
Note
Observe the operating and installation instructions of the
heat pump manager and the heat pump.
The connection must only be carried out by a qualified contractor
and in accordance with these instructions.
 Use cables with the relevant cross-sections. Observe the ap-
plicable national and regional regulations.
MCB/fuse
rating
Assignment Cable cross-section
B 16 A Electric emergency/
booster heater
(DHC)
Three-phase
2.5 mm² for routing through a wall.
1.5 mm² with only two live cores and
routing on a wall or in an electrical con-
duit on a wall.
B 16 A Electric emergency/
booster heater
(DHC)
1 phase
2.5 mm² for routing through a wall.
1.5 mm² when routing multi-core cables
on a wall or in an electrical conduit on
a wall.
B 16 A Control 1.5 mm²
Electrical data is provided in chapter "Specification / Data table".
!
Material losses
Provide separate fuses/MCBs for the two power circuits,
i.e. for the compressor and the electricemergency/boost-
er heater circuits.
Route the electrical cables into the appliance from below, along
the channel provided.
 Then route the electrical cables through the strain relief
fittings.
 Check the function of the strain relief fittings.

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INSTALLATION
Power supply
10.1 Electric emergency/booster heater
General
Appliance
function
Effect of the electric emergency/booster heater
Mono energetic
operation
If the heat pump undershoots the dual mode point, the elec-
tric emergency/booster heater safeguards both the heating
operation and the delivery of high DHW temperatures.
Emergency
mode
Should the heat pump suffer a fault that prevents its contin-
ued operation, the heating output will be covered by the elec-
tric emergency/booster heater.
Electrical connection 3 phase HM | HM Trend
D0000041479
XD02 Electric emergency/booster heater (DHC)
L1, L2, L3, N, PE
Connected load Terminal assignment
2.9 kW L1 N PE
5.9 kW L1 L2 N PE
8.8 kW L1 L2 L3 NPE
Power connection 1 phase only HM (S) | HM (S) Trend
1 2
1 2
D0000041480
XD02 Electric emergency/booster heater (DHC)
L1, L2, N1, N2, PE
Connected load Terminal assignment
2.9 kW L1 N1 PE
2.9 kW L2 N2 PE
5.9 kW L1 L2 N1 N2 PE
10.2 Control voltage
D0000041478
XD1.1 Power supply (Netz)
L, 2, N, PE
XD1.2 Power supply utility (EVU)
L, L'

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INSTALLATION
Power supply
10.3 WPM heat pump manager
WARNING Electrocution
Only components that operate with safety extra low
voltage (SELV) and that ensure secure separation from
the mains voltage supply may be connected to the low
voltage terminals of the appliance.
Connecting other components can make parts of the ap-
pliance and connected components live.
 Only use components which have been approved by
us.
X2.2 X2.3 X2.4 X2.5 X2.6 X2.7 X2.8 X2.9 X2.10 X2.11 X2.12 X2.13 X2.14 X2.15
X1.1
CAN A
X1.19
CAN A
X1.18
CAN B
X1.17X1.16X1.15X1.14X1.13X1.12X1.2
CAN B
X1.3 X1.4 X1.5 X1.6 X1.7 X1.8 X1.9 X1.10 X1.11
X2.1
D0000071841
Safety extra low voltage
X1.1
CAN A
+
-
L
H
+
-
L
H
CAN (connection for heat pump and WPE heat
pump extension)
X1.2
CAN B
+
-
L
H
+
-
L
H
CAN (connection for FET remote control and
ISG Internet Service Gateway)
X1.3 Signal
Earth
1
2
Outside temperature sensor
X1.4 Signal
Earth
1
2
Buffer sensor (heating circuit sensor 1)
X1.5 Signal
Earth
1
2
Flow sensor
X1.6 Signal
Earth
1
2
Heating circuit sensor 2
X1.7 Signal
Earth
1
2
Heating circuit sensor 3
X1.8 Signal
Earth
1
2
DHW cylinder sensor
X1.9 Signal
Earth
1
2
Source sensor
X1.10 Signal
Earth
1
2
2nd heat generator (2.WE)
X1.11 Signal
Earth
1
2
Cooling flow
X1.12 Signal
Earth
1
2
DHW circulation sensor
X1.13 Signal
Earth
Signal
1
2
3
FE7 remote control/ telephone remote
switch/ heating curve optimisation/ SGReady
X1.14 Constant 12V
Input
GND
+
IN
Analogue input 0-10V
X1.15 Constant 12V
Input
GND
+
IN
Analogue input 0-10V
X1.16 Signal
Earth
1
2
PWM output 1
X1.17 Signal
Earth
1
2
PWM output 2
Safety extra low voltage
X1.18
CAN B
+
-
L
H
+
-
L
H
CAN (connection for FET remote control and
ISG Internet Service Gateway)
X1.19
CAN A
+
-
L
H
+
-
L
H
CAN (connection for heat pump and WPE heat
pump extension)
Mains voltage
X2.1 L
L
N
N
PE
PE
L
L
N
N
Power supply
X2.2 L' (power supply
utility input)
L* (pumps L)
L'
L* (pumps L)
L' (power supply utility input)
L* (pumps L)
X2.3 L
N
PE
L
N
PE
Heating circuit pump 1
X2.4 L
N
PE
L
N
PE
Heating circuit pump 2
X2.5 L
N
PE
L
N
PE
Heating circuit pump 3
X2.6 L
N
PE
L
N
PE
Buffer charging pump 1
X2.7 L
N
PE
L
N
PE
Buffer charging pump 2
X2.8 L
N
PE
L
N
PE
DHW charging pump
X2.9 L
N
PE
L
N
PE
Source pump/ defrost
X2.10 L
N
PE
L
N
PE
Fault output
X2.11 L
N
PE
L
N
PE
DHW circulation pump/ 2nd heat
source DHW
X2.12 L
N
PE
L
N
PE
2ndheat source heating
X2.13 L
N
PE
L
N
PE
Cooling
X2.14 Mixer OPEN
N
PE
Mixer CLOSE
5
N
PE
6
Mixer, heating circuit 2
(X2.14.1 Mixer OPEN
X2.14.2 Mixer CLOSE)
X2.15 Mixer OPEN
N
PE
Mixer CLOSE
5
N
PE
6
Mixer, heating circuit 3
(X2.15.1 Mixer OPEN
X2.15.2 Mixer CLOSE)
Note
For every appliance fault, output X2.10 issues a 230V
signal.
In the case of temporary faults, the output switches the
signal through for a specific time.
In the case of faults that result in a permanent appliance
shutdown, the output switches through permanently.

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INSTALLATION
Power supply
10.4 Sensor installation
10.4.1 Return temperature measuring
 Connect an additional return sensor in combination with the
following heat pump types:
- HPA-O 3-8 CS Plus (only in combination with a buffer
cylinder)
- HPA-O 7-13 (C)(S) Premium (only in combination with a buff-
er cylinder)
- WPL 13 E/cool
- WPL 18 E/cool
- WPL 15-25 A(C)(S) (only in combination with a buffer
cylinder)
- WPL 07-17 ACS classic (only in combination with a buffer
cylinder)
- WPL 19-24 I, A (only in combination with a buffer cylinder)
Note
 For heat metering with the WPL 07-17 ACS classic/
HPA-O 3-8 CS Plus in conjunction with the HM(S)
(Trend) hydraulic module, observe the section “Heat
metering with the WPL 07-17 ACS classic / HPA-O 3-8
CS Plus”.
For systems without a buffer cylinder
 Fit the sensor in the heating circuit return as a contact sensor
and if necessary, downstream of any overflow valve installed.
For systems with a buffer cylinder
 Fit the sensor as a return temperature sensor in the buffer
cylinder.
Installation:
The electrical connection is made at terminal X1.4.
 When installing a sensor, observe the commissioning in-
structions for the heat pump manager (see chapter “Connect-
ing external components”).
10.4.2 Heat metering with the WPL 07-17 ACS classic / HPA-O
3-8 CS Plus
Note
 Install the following immersion sensor for the heat
pump, in addition to the sensor described in chapter
“Return temperature measuring”.
 Use the immersion sensor connected to terminal X61 for heat
metering.
D0000067540
 If required, extend the sensor lead. Use a cable with a mini-
mum diameter of 0.34mm².
D0000067541

www.stiebel-eltron.com HM (S)| HM(S) Trend | 13
INSTALLATION
Power supply
If no ASL-HM connector block is used:
D0000069971
1
1 Immersion sensor
 Solder the sensor well provided onto the common return
from the DHW and heating system in the building to the heat
pump.
 Insert the immersion sensor into the sensor well.
 Insulate the pipe in accordance with national and regional
regulations.
If an ASL-HM connector block is used:
 Insert the immersion sensor into the sensor well prefitted in
the ASL-HM.
10.4.3 TAF PT immersion/contact sensor
 When installing a sensor, observe the commissioning in-
structions for the heat pump manager (see chapter “Connect-
ing external components”).
10.4.4 Outside temperature sensor AFPT
 When installing a sensor, observe the commissioning in-
structions for the heat pump manager (see chapter “Connect-
ing external components”).
10.5 Connecting external components
 When installing external components, observe the commis-
sioning instructions for the heat pump manager (see chapter
“Connecting external components”).
10.6 Fitting the appliance cap
 Fit the appliance cap in reverse order to the instructions pro-
vided in chapter “Removing the appliance cap”.
Cable with connector
D0000041465
21
1 Connection
2 Connector from the programming unit
 Fit the connector from the programming unit in the control
panel.
!
Material losses
Take care not to pinch the power cable of the program-
ming unit when fitting the appliance cover.
 Arrange the power cable in a loop again and secure
it with the multi-use cable tie provided.

14 | HM (S)| HM(S) Trend www.stiebel-eltron.com
INSTALLATION
Commissioning
11. Commissioning
!
Material losses
To prevent the temperature falling below the dew point,
the casing must be closed during operation and undam-
aged.
A contractor must commission the appliance, make all the set-
tings at the commissioning level of the heat pump manager, and
instruct the user.
Commissioning must be carried out in accordance with these op-
erating and installation instructions and the operating and instal-
lation instructions of all components belonging to the heat pump
system. Our customer support can assist with commissioning,
which is a chargeable service.
A heat pump system can comprise many different components.
A sound knowledge of the system function is therefore essential.
Where this appliance is intended for commercial use, the rules of
the relevant Health & Safety at Work Act may be applied during
commissioning. For further details, check with your local super-
visory body; in Germany for example, this is theTÜV.
11.1 Check before commissioning the heat pump
manager
!
Material losses
When removing the appliance cap, pull the connection
plug of the programming unit out of the control panel.
D0000041465
21
1 Connection
2 Connector from the programming unit
!
Material losses
Take care not to pinch the power cable of the program-
ming unit when fitting the appliance cap.
 Arrange the power cable in a loop and secure it with
the multi-use cable tie provided.
!
Material losses
Observe the maximum system temperature in underfloor
heating systems.
 Check whether the heating system is charged to the correct
pressure.
 Have you closed the air vent valve of the multi-function as-
sembly (MFG) again after venting?
 Have you placed and connected the outside temperature sen-
sor and the return sensor correctly?
 Check whether further sensors are correctly positioned and
connected.
 Check whether the power supply is connected correctly.
 Check whether the signal cable to the heat pump (bus cable)
is correctly connected.
11.1.1 High limit safety cut-out
At ambient temperatures below -15 °C the high limit safety cut-out
of the multi-function assembly may respond.
 Check whether the high limit safety cut-out has tripped.
D0000041470
 Reset the high limit safety cut-out by pressing the reset
button.
11.2 Appliance handover
Explain the function of the appliance to users and familiarise them
with its operation.
Note
Hand over these operating and installation instructions
to the user for safe-keeping. Always carefully observe all
information in these instructions. They provide informa-
tion on safety, operation, installation and maintenance
of the appliance.

www.stiebel-eltron.com HM (S)| HM(S) Trend | 15
INSTALLATION
Troubleshooting
12. Troubleshooting
WARNING Electrocution
 Isolate the appliance from the power supply when
carrying out any work.
!
Material losses
When removing the appliance cap, pull the connection
plug of the programming unit out of the control panel.
Proceed as follows:
 Pull the appliance cap forward by approx. 5cm.
 Pull off the connector.
 Remove the appliance cover.
D0000041465
21
1 Connection
2 Connector from the programming unit
!
Material losses
Take care not to pinch the power cable of the program-
ming unit when fitting the appliance cover.
 Arrange the power cable in a loop again and secure
it with the multi-use cable tie provided.
12.1 Resetting the high limit safety cut-out
If the heating water temperature exceeds 90°C, the electric emer-
gency/booster heater shuts down.
D0000041470
 Remove the cause of the fault.
 Reset the high limit safety cut-out by pressing the reset but-
ton. To do so, use a pointed object.
 Check whether the heating water is being circulated at a suf-
ficiently high flow rate.
13. Maintenance
We recommend a regular inspection (to establish the current con-
dition of the system), and maintenance if required (to return the
system to its original condition).

16 | HM (S)| HM(S) Trend www.stiebel-eltron.com
INSTALLATION
Specication
14. Specification
14.1 Dimensions and connections
HM(S) | HM(S) Trend without ASL-HM
896
588
81
251
422
337 95
25
405
c12
d01 e01 d29
b01
D0000041455
b01 Entry electrical cables
c12 Safety valve drain
d01 Heat pump flow Female thread G 1
d29 Heat exchanger flow Female thread G 1
e01 Heating flow Female thread G 1
HM(S) | HM(S) Trend with ASL-HM
1131
846
25
95
405
215
590
78
163
248
333
418
503
c12
d01
e02 d30
d02
e01 d29
b01
D0000041456
b01 Entry electrical cables
c12 Safety valve drain
d01 Heat pump flow Diameter mm 28
d02 Heat pump return Diameter mm 28
d29 Heat exchanger flow Diameter mm 28
d30 Heat exchanger return Diameter mm 28
e01 Heating flow Diameter mm 28
e02 Heating return Diameter mm 28

www.stiebel-eltron.com HM (S)| HM(S) Trend | 17
INSTALLATION
Specication

18 | HM (S)| HM(S) Trend www.stiebel-eltron.com
INSTALLATION
Specication
14.2 Wiring diagram HM | HM Trend
M
1~
123456
p
+SV
GND
OUT
421
Hz
T2 T1
+SV
GND
OUT
PT 1000
XD02 XD01.1 XD01.2
MA14
MA15
BP10
BF01
BT02 BT01
NETZ EVUDHC (MFG)
XD80
1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 3 3 4 2 3 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 4 4 4 4 4 5 5 5 6
X72
X71
X70 X69 X68 X67 X66 X65 X64 X63 X62 X61 X60
AA07 (MFG)
KF22 KF21 KF20
MFG
BT55
X59
AA07
<T
11 12
21 22 32
31
1 3
1
1 3
3
KF20 KF21 KF22
EB01
PWM
GND
134
M
1~
ws (PWM)
br (GND)
NL
L L L L L L L L L L L
N N N N N N N N N N N N N
PE PE PE PE PE PE PE PE PE PE PE PE
L'
L*
PE PE
X2.15 X2.14 X2.13 X2.12 X2.11 X2.10
X2.9 X2.8 X2.7 X2.6 X2.5 X2.4 X2.3 X2.2
X2.1
+ +
- -
L L
H H
1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 3
+ +
IN IN
1 1 2 2
+ +
- -
L L
H H
X1.17 X1.16 X1.15 X1.14 X1.13 X1.12 X1.11 X1.10
X1.9 X1.8 X1.7 X1.6 X1.5 X1.4 X1.3
AA01 (WPM4)
X1.19 X1.18
CAN B CAN A
X1.1 X1.2
CAN A CAN B
L L
N
AA06
1234
X27
1= 2= 3= 4=
+12V
H L
L1L2L3N
N L1 L2 L3 NL 2 L L´
D0000081112

www.stiebel-eltron.com HM (S)| HM(S) Trend | 19
INSTALLATION
Specication
AA01 WPM heat pump manager
AA06 Programming unit
AA07 PCB, booster heater MFG
EB01 Booster heater MFG
BF01 Flow rate and temperature, heating circuit
BP10 Pressure sensor, heating circuit
BT01 Temperature sensor, heat pump flow
BT02 Temperature sensor, heat pump return
BT55 High limit safety cut-out MFG (manual reset)
MA14 Motor, buffer charging pump (PWM/1-10V)
MA15 Motor, diverter valve, heating/DHW
KF20 Relay, booster heater MFG
KF21 Relay, booster heater MFG
KF22 Relay, booster heater MFG
XD01.1 Terminal, power supply
XD01.2 Terminal, power-OFF contact
XD02 Terminal, MFG power supply
XD80 Plug-in connector (CAN bus)
AA01 extra low voltage
AA01-X1.1 Connector, CAN A (WP connection)
AA01-X1.2 Connector, CAN B (FET/ISG connection)
AA01-X1.3 Connector, outside temperature sensor
AA01-X1.4 Connector, buffer temperature sensor BT06
AA01-X1.5 Connector, flow temperature sensor
AA01-X1.6 Connector, heating circuit temperature sensor 2
AA01-X1.7 Connector, heating circuit temperature sensor 3
AA01-X1.8 Connector, DHW cylinder sensor BT20
AA01-X1.9 Connector, source sensor
AA01-X1.10 Connector, heat source 2
AA01-X1.11 Connector, flow, cooling
AA01-X1.12 Connector, DHW circulation sensor
AA01-X1.13 Connector, remote control FE7
AA01-X1.14 Connector, analogue input 0-10V
AA01-X1.15 Connector, analogue input 0-10V
AA01-X1.16 Connector, PWM output 1
AA01-X1.17 Connector, PWM output 2
AA01-X1.18 Connector, CAN B (FET/ISG connection)
AA01-X1.19 Connector, CAN A (MFG)
AA01 Control voltage
AA01-X2.1 Connector, power supply
AA01-X2.2 Connector, power-OFF contact
AA01-X2.3 Connector, heating circuit pump 1
AA01-X2.4 Connector, heating circuit pump 2
AA01-X2.5 Connector, heating circuit pump 3
AA01-X2.6 Connector, buffer charging pump 1
AA01-X2.7 Connector, buffer charging pump 2
AA01-X2.8 Connector, DHW charging pump
AA01-X2.9 Connector, source pump/defrost
AA01-X2.10 Connector, fault output
AA01-X2.11 Connector, DHW circulation pump/ HS2 – DHW
AA01-X2.12 Connector, HS2 – heating
AA01-X2.13 Connector, cooling
AA01-X2.14 Connector, mixer, heating circuit 2 (X2.14.1 Mixer
OPEN/X2.14.2 Mixer CLOSE)
AA01-X2.15 Connector, mixer, heating circuit 3 (X2.15.1 Mixer
OPEN/X2.15.2 Mixer CLOSE)
AA06-X27 Terminal, programming unit
AA07-X60 Connector, temperature sensor, heat pump flow
BT01
AA07-X61 Connector, temperature sensor, heat pump re-
turn BT02
AA07-X62 Not assigned – connector, temperature sensor,
heat pump return
AA07-X63 Not assigned – connector, temperature sensor,
DHW cylinder, internal
AA07-X64 Connector, temperature and flow rate, heating
circuit, BF01
AA07-X65 Not assigned
AA07-X66 Rast 2.5 connector (heating system pressure)
BP01
AA07-X67 Not assigned
AA07-X68 Connector, switching, motor, diverter valve cen-
tral heating / DHW
AA07-X69 Not assigned
AA07-X70 Connector, switching, pump, heating circuit PW-
M/1-10V
AA07-X71 Not assigned
AA07-X72 Connector, CAN bus
EB01-X59 Terminal, MFG

20 | HM (S)| HM(S) Trend www.stiebel-eltron.com
INSTALLATION
Specication
14.3 Wiring diagram HMS | HMS Trend
M
1~
123456
p
+SV
GND
OUT
421
Hz
T2 T1
+SV
GND
OUT
PT 1000
XD02 XD01.1 XD01.2
MA14
MA15
BP10
BF01
BT02 BT01
NETZ EVUDHC (MFG)
XD80
1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 3 3 4 2 3 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 4 4 4 4 4 5 5 5 6
X72
X71
X70 X69 X68 X67 X66 X65 X64 X63 X62 X61 X60
AA07 (MFG)
KF22 KF21 KF20
EB01
MFG
BT55
X59
AA07
<T
11 12
21 22 32
31
1 3
1
1 3
3
KF20 KF21 KF22
PWM
GND
3 14
M
1~
ws (PWM)
br (GND)
NL
L L L L L L L L L L L
N N N N N N N N N N N N N
PE PE PE PE PE PE PE PE PE PE PE PE
L'
L*
PE PE
X2.15 X2.14 X2.13 X2.12 X2.11 X2.10
X2.9 X2.8 X2.7 X2.6 X2.5 X2.4 X2.3 X2.2
X2.1
+ +
- -
L L
H H
1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 3
+ +
IN IN
1 1 2 2
+ +
- -
L L
H H
X1.17 X1.16 X1.15 X1.14 X1.13 X1.12 X1.11 X1.10
X1.9 X1.8 X1.7 X1.6 X1.5 X1.4 X1.3
AA01 (WPM4)
X1.19 X1.18
CAN B CAN A
X1.1 X1.2
CAN A CAN B
L L
N
AA06
1234
X27
N
1
N
2
L
1
L
2
Zusatz-BHZ
(im MFG 5 nicht verbaut!)
1= 2= 3= 4=
+12V
H L
L 2 N L L´
LN N L
D0000081112
Emergency/booster heater (not installed in the MFG 5)