STIEBEL ELTRON HM Trend Instruction Manual

OPERATION AND INSTALLATION
Hydraulic module for heat pumps
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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'