STIEBEL ELTRON WPF 7 MS User manual

INSTALLATION INSTRUCTIONS
BRINE/WATER HEAT PUMP
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2
1. Installation instructions for contractors
1.1 General information
These installation instructions are for
contractors.
The installation (water and electrical
work) and commissioning, as well as the
maintenance of this equipment, must only
be carried out by an authorised qualified
contractor in accordance with these
instructions. The heat pump installation also
requires the operating instructions of the heat
pump manager WPM II.
The heating heat pump and the WPM II
represent one function unit. Consequently,
their instructions are matched to each other.
Subject to the relevant system, observe the
installation instructions of the components of
which the system comprises.
1.2 Equipment description
The WPF...M(S) is a heating heat pump which
is designed for operation as brine/water heat
pump. The heat pump extracts energy from
the heat source medium, i.e. brine, at a low
temperature level. This extracted energy is
then transferred to the heating water at a
higher level, enriched with the energy drawn
by the compressor. Subject to the heat source
temperature, the heating water can be heated
up to a flow temperature of 60 °C.
Modular operation is feasibly with the
WPF..M(S).
1.3 Function
The heat source medium (brine) enters
the heat pump evaporator. There, heat is
extracted from the medium, so it exits the heat
pump at a lower temperature.
The energy made useful through the heat
pump is transferred to the heating water
inside the condenser.
Then, the heating water transfers its energy to
the heating circuit.
Special accessories (required) Part no.
Heat pump manager with wall mounting enclosure, WPMW II 18 54 50
Heat pump manager as control panel mounted version, WPMS II 18 54 51
Special accessories Part no.
Mixer module with wall mounting enclosure, MSMW 07 40 12
Mixer module as control panel mounted version, MSMS 07 40 11
WPAB 22 08 33
Pressure hose G 1¼” x 1 m (DN 32) 07 44 14
Pressure hose G 1¼” x 2 m (DN 32) 18 20 19
Pressure hose G 1¼” x 5 m (DN 32) 18 20 20
Hose fittings for pressure hose DN 32 07 06 92
Heat pump compact installation set WPKI 5 22 08 30
Heat pump compact installation set WPKI Set 18 52 77
UP kit 25 - 60 (for WPKI 5) 07 43 25
UP kit 25 - 80 (for WPKI 5) 07 43 16
Cylinder SBP 200 E 18 45 58
Cylinder SBP 400 E 22 08 24
Cylinder SBP 700 E 18 45 59
Cylinder SBP 700 E SOL 18 45 60
DHW cylinder SBP 300 WP 18 55 20
DHW cylinder SBP 400 WP SOL 18 55 21
Brine assembly WPSB 307 07 42 01
Brine assembly WPSB 310 07 42 02
Brine assembly WPSB 307 (S) 22 14 73
Brine assembly WPSB 310 (S) 22 14 74
Brine distributor WPSV 25-4 22 03 86
Brine distributor WPSV 32-4 22 03 87
Brine distributor WPSV 25-6 22 03 90
Brine distributor WPSV 32-6 22 03 91
Heating system remote control FE 7 18 55 79
Contact sensor AVF 6 16 53 41
Immersion sensor TF 6 17 01 04
Heat transfer medium (concentrate) (30 litre can) 16 16 96
Index
1. Installation instructions
for contractors 2
1.1 General information 2
1.2 Equipment description 2
1.3 Function 2
1.4 Regulations and requirements 2
Accessories 2
1.5 Specification 3
Equipment layout 6
1.6 Transport and postitioning 6
1.7 Electrical connection 9
1.8 Modules 10
1.9 Commissioning 16
1.10 Operation and control 16
1.11 Maintenance and cleaning 16
1.12 Troubleshooting 15
Commissioning report 16
Environment/recycling 19
Customer service/warranty 19
1.4 Regulations and requirements
On the water side:
DIN 4751 sh. 1 and 2: Safety equipment for hot
water heating systems
TRD 721: Safety equipment to prevent excess
pressure - safety valves, or local regulations.
Building Regulations, G3 - Hot water
storage Regulations of your local water supply
company.
On the electrical side:
DIN VDE 0100: Regulations for the installation
of HV systems with rated voltages up to
1000 V.
VDE 0701: Regulations regarding the repair,
modification and testing of used electrical
equipment.
TAB: Technical connection conditions for
connections to the LV mains.
On the refrigerant side:
EN 378: Safety and environmental
requirements, or local regulations.
DIN 7003 (draft version)
General:
Collation of technical requirements for boiler
rooms, e.g. Boiler Room Directives or national/
local Building Regulations, commercial and
fire as well as emission control regulations
and requirements, or local regulations.
Technical instructions to protect against noise
emissions.
ENEV: Energy Savings Order [Germany]
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
1.5 Specification
Heat pump Type WPF 7 MS WPF 10 M
(WPF 10 MS)
WPF 13 M WPF 16 M
Part no. 22 25 53 18 53 49
(22 25 52)
18 21 35 22 08 94
Design and function
Design: compact / split / open version Compact
Function mono-mode
dual-mode - alternative
parallel dual-mode
Dimensions, weights, connection dimensions
Dimensions H/W/D mm 971 x 510 x 640 971 x 510 x 640 971 x 510 x 640 971 x 510 x 640
Weight kg 107 112 120 125
Refrigerant Type R 410A
Fill weight kg see type plate
Permissible operating pressure MPa 4.3
Pipe connector – heating side Inch G 1¼” (male) G 1¼” (male) G 1¼” (male) G 1¼” (male)
Pipe connector on the heat source side Inch G 1¼” (male) G 1¼” (male) G 1¼” (male) G 1¼” (male)
Evaporator material 1.4401/Cu
Condenser material 1.4401/Cu
Performance details heat pump (EN 255)
Heat output with B0/W35 1) kW 7.8 9.9 (9.9) 13.4 16.3
Cooling output with B0/W35 1) kW 6.1 7.8 (7.8) 10.4 12.8
Power consumption with B0/W35 1) kW 1.78 2.2 (2.2) 3.05 3.5
Performance factor with B0/W35 1) 4.4 4.5 (4.5) 4.4 4.7
Heating water temperature spread with B0/W35 1) K 10 10 (10) 10 10
Process medium
Process medium hot side/cold side Brine made from water with 33 % vol. ethylene glycol
Flow rate min. hot side m3/h 0.7 0.9 1.2 1.5
cold side m3/h 1.9 2.2 3.1 3.8
Permissible operating pressure, hot and cold sides MPa 0.3 0.3 0.3 0.3
Internal pressure differential cold side 2) hPa 110 120 230 250
Operating temperature limits
WQA min./WQA max. 3)°C
–5 / 20, short periods (max. 30 min), max. source temp. up to 40 °C permiss.
WNA min./WNA max. 3) °C 15 / 60
Electrical specification
Fuses mains compressor
control circuit
A
A
C 25 A
C 16 A
C 16 A (C 25 A)
C 16 A (C 16 A)
C 16 A
C 16 A
C 16 A
C 16 A
Protection EN 60529 (DIN VDE 0470) IP 20 IP 20 IP 20 IP 20
Voltage / frequency - compressor V/Hz 1/PE~230/50 3/PE~400/50
(1/PE~230/50)
3/PE~400/50 3/PE~400/50
Voltage / frequency – control circuit V/Hz 1/N/PE~230/50 1/N/PE~230/50 1/N/PE~230/50 1/N/PE~230/50
Starting current WPF...M
Start-up current: at WPF...MS with WPAB / LRA
A
A 32 / 88
27
41 / 97
28 29
Max. power consumption; compressor 4) kW 3.0 3.8 5.2 5.8
Corrosion protection casing zinc-plated / painted
Compliant with safety regulations DIN EN 60335,
DIN 8975, EMC Directive 89/336/EEC,
Low Voltage Directive 73/23/EEC
Sound power level 5) dB(A) 47 51 53 53
1) B0/W35 = brine water inlet temperature 0 °C, heating flow 35 °C
2) With B0/W35
3) WQA = heat source system (cold side)
WNA = heat utilisation system (hot side)
4) With B20/W60
5) With B10/W50 to DIN EN 255

4
Performance curve WPF 10 M(S)
Performance curve WPF 7 MS
-5 0 5 10 15 20
8 7 6 5 4 3 2
°C
15 10
5 0
Ethylenglykol/Wassergemisch mit 33 Vol.% Ethylenglykol
1 = Vorlauftemperatur 35 °C Volllast 2 = Vorlauftemperatur 50 °C Volllast 3 = Vorlauftemperatur 60 °C Volllast
-5 0 5 10 15 20
°C
Ethylenglykol/Wassergemisch mit 33 Vol.% Ethylenglyk
o
1 = Vorlauftemperatur 35 °C Volllast 2 = Vorlauftemperatur 50 °C Volllast 3 = Vorlauftemperatur 60 °C Volllast
8 7 6 5 4 3 2
20 15 10
5 0
26_03_01_0084
Coefficient of perf. Power consumption Heat output
Inlet temp. of the WQA medium
1 = flow temperature 35 °C full load
2 = flow temperature 50 °C full load
3 = flow temperature 60 °C full load
Ethylene glycol:water mixture with 33% ethylene glycol content
C26_03_01_0258
Coefficient of perf. Power consumption Heat output
Inlet temp. of the WQA medium
1 = flow temperature 35 °C full load
2 = flow temperature 50 °C full load
3 = flow temperature 60 °C full load
Ethylene glycol:water mixture with 33% ethylene glycol content
Fig. 2a
Fig. 2b

5
Performance curve WPF 13 M
Performance curve WPF 16 M
-5 0 5 10 15 20
°C
Ethylenglykol/Wassergemisch mit 33 Vol.% Ethylengly
k
1 = Vorlauftemperatur 35 °C Volllast 2 = Vorlauftemperatur 50 °C Volllast 3 = Vorlauftemperatur 60 °C Volllast
8 7 6 5 4 3 2
25 20 15 10
5 0
Ehtylenglykol/Wassergemisch mit 33 Vol.% Ethylenglykol
-5 0 5 10 15 20
8
7
6
5
4
3
2
°C
30
25
20
15
10
5
0
1 = Vorlauftemperatur 35 °C Volllast
2 = Vorlauftemperatur 50 °C Volllast
3 = Vorlauftemperatur 60 °C Volllast
C26_03_01_0237
Coefficient of perf. Power consumption Heat output
Inlet temp. of the WQA medium
Ethylene glycol:water mixture with 33% ethylene glycol content
Ethylene glycol:water mixture with 33% ethylene glycol content
1 = flow temperature 35 °C full load
2 = flow temperature 50 °C full load
3 = flow temperature 60 °C full load
1 = flow temperature 35 °C full load
2 = flow temperature 50 °C full load
3 = flow temperature 60 °C full load
Heat output
Power consumption
Coefficient of perf.
Inlet temp. of the WQA medium
Fig. 2c
Fig. 2d

6
1.6 Transport and positioning
1.6.1 Transport
To protect the equipment against damage,
it must be transported vertically inside its
dedicated packaging. Storage and transport at
temperatures below – 20 °C and in excess of +
50 °C are not permissible.
1.6.2 Positioning
1. Remove the equipment from its pallet and
position it where required.
2. Remove the eight screws from the
equipment plinth (Fig. 5), and set down the
casing onto the floor.
!
The casing must stand on the floor
free from the refrigeration unit.
That means, the eight plinth screws must
not be refitted.
!
Checking installation conditions. The
heat pump WPF...M(S) is designed
for installation in interiors, except in wet
areas.
The room where the WPF...M(S) is to be
installed must also meet the following
conditions:
zNo risk from frost.
z
Load-bearing floor (weight of the WPF..M(S)
approx. 145 kg).
zHorizontal, level and solid floor, as the
equipment feet on the heat pump are non-
adjustable.
1 Brine outlet
2 Brine inlet
3 Heating flow
4 Heating return
5 Safety assembly connection
(included in the pack)
6 Condenser
7 Evaporator
8 Sensor well for return sensor
9 Sight glass
10 High pressure limiter
11 Filter dryer
12 Fill & drain valve (heating)
13 Fill & drain valve (brine)
14 Expansion valve
15 Compressor
16 Low pressure limiterr (only for mono phase)
16 ND-sensor (only for triple phase)
17 HD-sensorr (only for triple phase)
WPF 7 MS
WPF 10 M(S)
WPF 13 M
WPF 16 M
Fig. 3
zFor a quiet heat pump operation on floating
screeds, remove the screed and the anti-
vibration insulation around the installation
location of the heat pump
(Fig. 8).
zThe room must not be subject to a risk
of explosions arising from dust, gases or
vapours.
zThe floor area of the installation room must
be at least 3 m², and the room must provide
a volume of 6 m³ (minimum).
z
When installing the WPF ...M in a boiler
room together with other heating
equipment ensure, that the operation
of other heating equipment will not be
impaired.
1.6.3 Installation of the heat source system for
the WPF ...M(S) with brine as heat source
Design the heat source system for the brine/
water heat pump in accordance with the
Stiebel Eltron technical guides.
Permitted brine:
– Ethylene glycol
– Propylene glycol
– Concentrated heat transfer medium
Part no: 161696
– Heat transfer medium (ready-mixed)
Part no: 185472
When using ready-mixed heat transfer
medium (part no. 185472), never seal the heat
source system with hemp.
1.6.3.1 Circulation pump and required flow
rate
Use a circulation pump with compound-filled
windings to supply the brine, to prevent an
earth short circuit through condensation in
the electrical part of the pump (cold water
version).
Size the circulation pump in accordance with
the system-specific conditions, i.e. observe
the nominal flow rate and pressure drop
(see 1.5 “Specification”, page 3).
An adequate flow rate must be safeguarded at
every possible brine temperature, i.e.:
– Nominal flow rate at brine temperature
0 °C with a tolerance of +10 %.
1.6.3.2 Connection and filling with brine
Prior to connecting the heat pump, check the
heat source circuit for possible leaks, and
flush thoroughly. Calculate the volume of
the heat source circuit. You can obtain the
brine volume inside the heat pump from the
following table.
Heat pump Brine volume
WPF 7(S) 6.45 l
WPF 10(S) / 13 M 7.06 l
WPF 16 M 7.73 l
The overall volume equals that of the required
volume of brine, which should be mixed from
33 % vol. undiluted ethylene glycol and 67 %
vol. water.
Mixing ratio:
C26_03_01_0208
Equipment layout 12 34
5
6
7
9
12
8
10
13
16
15
14
11
17

7
Fig. 4
Fig. 8
Fig. 6
Fig. 7
Fig. 5
1 Brine outlet
2 Brine inlet
3 Heating flow
4 Heating return
5 Safety assembly connection
(included in the pack)
6 Electrical cable terminal
1 Impact sound insulation
2 Floating screed
12
26_03_01_0210
26_03_01_0211
26_03_01_0218
26_03_01_0212
C26_03_01_0213
Fitting the casing components
Dimensions in mm
Removing the casing components
Recess screed and impact
sound insulation.

8
1 unit undiluted ethylene glycol with
2 units water (max. chloride contents in the
water = 300 ppm), then fill mixture into the
system.
Check the brine concentration:
Determine the density of the ethylene glycol
water mixture (e.g. with a hydrometer). Using
the actual density and temperature, you can
check the actual concentration in the diagram
(Fig. 10).
!
The quoted details refer to ethylene
glycol. The output details deviate
slightly from those stated when using
propylene glycol (see “Specification”).
To prevent the transmission of noise, connect
the heat source circuits to the heat pump
with flexible pressure hoses (for part no. see
section 2 “Special accessories”).
1.6.3.3 Checking the flow rate
(to be implemented during the heat pump
commissioning)
Measure the flow and return temperatures
of the heat source. For this, determine the
temperature differential by measuring the
temperature under the thermal insulation on
both flow and return pipes of the heat pump.
The diagram (Fig. 9) shows the temperature
spread at the rated volume flow.
!
At the WPM II, adjust parameter 12
(source) in the commissioning list to
“Ethylene glycol”, otherwise the frost
protection limiter would switch OFF the
heat pump at temperatures below 7 °C.
You can check the source inlet temperature
on the WPM II display under system
parameter INFO TEMP.
1.6.4 Installation of the heat consumer system
1.6.4.1 Install the heat consumer system
(heating circuit) in accordance with current
technical guidelines. For safety equipment on
the heating system, consult DIN 4751 page 2 or
local regulations.
Prior to connecting the heat pump, check the
heating system for leaks, flush it thoroughly,
fill and carefully vent it.
When filling the system with heating
water, observe VDI 2035, sheet 1 [or local
regulations]. In particular, this means that
zduring the service life of the system, the
total of the fill and top-up water must not
exceed three times the nominal volume of
the heating system,
zthe total alkaline earths in the water must
be < 3.0 mol/m³,
zthe total water hardness must be
< 3 mmol/l , and
zsoften the water, if the above conditions
cannot be met.
Generally soften the heating water, if the
specific system volume > 20 l/kW output
(e.g. systems with buffer cylinder).
Check the correct connection of heating flow
and return (Fig. 3 and 9). The reduction of
structure-borne vibrations on the water side
requires the installation of flexible pressure
hoses (for part no. see “Special accessories”).
Fit the thermal insulation in accordance
with local regulations appertaining heating
systems.
1.6.4.2 Buffer cylinder
A buffer cylinder is recommended to ensure
trouble-free heat pump operation. The buffer
cylinder provides hydraulic separation of the
volume flow in the heat pump circuit and the
heating circuit.
The flow rate in the heat pump remains
constant if, for example, the flow rate in the
heating circuit is reduced by thermostatic
valves.
1.6.4.3 Circulation pump (cylinder primary
pump)
When using a buffer cylinder SBP 200 and the
heat pump compact installation WPKI 5, select
and install the circulation pump in accordance
with the installation instructions for the
WPKI 5.
The total pressure drop is the sum of the
pressure drop values for the heat pump, the
interconnecting lines and the WPKI 5.
1.6.4.4 Circulation pump (heating circuit pump)
Where no buffer cylinder is used, size
the circulation pump on the heating side
taking the condenser pressure drop into
consideration. Safeguard the nominal flow
rate of the heat pump (see table below) under
all operating conditions of the heating system
by installing an overflow valve.
1.6.4.5 Second external heat source
For dual-mode heating systems, always
connect the heat pump into the return of the
second heat source (e.g. oil fired boiler).
High heating water temperature:
In dual-mode heating systems, the return
water from the second heat source can
flow through the heat pump, immediately
after it has been switched off, with a max.
Temperature of 60 °C.
The temperature may be 70 °C no earlier than
ten minutes after shutdown.
Pressure differentials and nominal flow rates
Heat pump type WPF..M(S) 7 10 13 16
Nominal volume flow m³/h 0.7 0.9 1.2 1.5
Heat pump pressure differential
at nominal flow rate
hPa 58 58 62 40
Pressure differential of the compact installation WPKI 5
at nominal flow rate
hPa 30 32 34 40
Pressure differential of the connecting line 35x1.5
at nominal flow rate
hPa/m 0.8*) 0.9*) 1.0*) 1.3*)
*) Values refer to straight pipe runs. Bends, valves, heat meters etc. must additionally be taken
into account.
C26_03_01_0143
Fig. 9
1
2
3
4
5
6
-5 0 5 10 15 20
Quelleneintrittstemperatur [°C]
Temperaturdifferenz [K]
Sole - HV 35°C
Sole - HV 50°C
Temperature spread at rated volume flow
Source inlet temperature
Temperature differential
Brine
Brine

9
Fig. 10
1.6.4.6 Heat meter
Observe the additional pressure drop when
installing heat meters on the heating side.
The sieves inside the heat meters are easily
blocked by the dirt particles in the heating
circuit, further increasing the pressure drop.
1.6.4.7 Oxygen diffusion
Steel components, such as radiators and
pipes, can corrode if plastic underfloor heating
system pipes, which are permeable to oxygen,
are used.
The product of corrosion, i.e. rusty sludge, can
settle inside the heat pump evaporator and
can result in output loss through a reduction
of cross-section or in a heat pump shutdown
triggered by the high pressure limiter.
Therefore it is advisable to avoid open heating
systems or the installation of steel pipes in
conjunction with plastic pipes in underfloor
heating systems, which are permeable to
oxygen.
g/cm
1,130
1,120
1,110
1,100
1,090
1,080
1,070
1,060
1,050
1,040
1,030
1,020
1,010
1,000
0,990
0,980
O = Frostsicherheit
–20 –10 0 10 20 30 °C
40 50 60 70
0 VOL-% = Wasser
40 VOL-% = (-25°C)
37 VOL-% = (-23°C)
28 VOL-% = (-15°C)
20 VOL-% = (-10°C)
44 VOL-% = (-30°C)
52 VOL-% = (-40°C)
60 VOL-% = (-50°C)
100 VOL-% = Ethylenglykol
R
3
26_03_01_0092
Frost protection
water
Brine concentration Density U
of the ethylene glycol:water mixtures with different concentrations
1.6.4.8 Scaling
Water quality, operating conditions and the
water volume are decisive factors to the extent
of scaling. To prevent damage to valves, heat
exchanger and heating elements, check the
water condition and assess it in accordance
with VDI 2035 [or local regulations].
Note: An awareness of hardness in
accordance with the Detergent Act [Germany]
is insufficient. Decisive for scaling is the
concentration of calcium hydrogen carbonate,
which can be supplied by your water supply
company.
1.7 Electrical connection
Notify your local power supply company of the
electrical connection.
Only qualified electricians must carry out
the installation in accordance with these
instructions.
!
Before any work, isolate the
equipment from the power supply
at the control panel.
Observe VDE 0100 [or local regulations] and the
regulations of your local power supply company.
VDE 0298-4 specifies that, in accordance
with the relevant fuse protection, the fol-
lowing cable cross-sections are to be used:
Fuse Cable cross-section
16 A 2,5 mm²
1,5 mm² in case of two cores under
load and routing over a wall or
inside a wall mounted conduit.
25 A 6,0 mm² when routing the cable
through a wall.
4,0 mm² when routing a multi-core
cable over a wall or inside a wall
mounted conduit.
For fuse ratings, see specification
The WPF...M must be able to be separated

10
X3 Power supply
HP Heat pump (compressor)
L1, L2, L3, PE
X4 Control terminals
Mains supply: L, N, PE
Control input:
Ext. control STAND ALONE operation
X2 LV terminal
1 BUS High H
2 BUS Low L
3 BUS Ground
4 & 5 Temperature sensor
Phase monitoring relay
from the mains power supply by an additional
isolator, which disconnects all poles with
at least 3 mm contact separation. For this
purpose, use contactors, mains isolators,
fuses, etc. on site.
Terminals are located inside the WPF...M(S)
control panel (Fig. 11 and 13). The terminals
become accessible by removing the front
cover (Fig. 5). Remove the lid to enable the
equipment to be connected (Fig. 5).
The following are connected inside the control
panel:
– The power supply of the heat pump
controller IWS II
– The power supply of the compressor
– The BUS cable
Ensure that High, Low and Ground are
correctly connected.
– the enable signal for the stand alone ope-
ration at terminal X4/2. For this, remove the
jumper across terminals X4/1 and X4/2.
The IWS II (abbreviation for integrated heat
pump control) is a PCB fitted as standard
into the heat pump control panel. The IWS II
controls the contactors of the compressors and
the starting current limiter, receives the signal
inputs for high pressure, low pressure and
central faults and contains the BUS interface to
the WPM II.
Use appropriate cables in accordance with
local regulations for all connections.
Check the strain relief function.
BUS cable: J-Y (St) 2x2x0.8
Observe the operating instructions for the heat
pump manager WPM II.
Connect the circulation pump for the heat
utilisation side in accordance with the design
documentation.
STAND ALONE operation
In emergencies, this heat pump can also
operate without the heat pump manager (see
page 15).
When fitting the front cover secure it, as
shown in Fig. 6, with the associated screws
and serrated washers (included in the pack
supplied).
Route all connecting cables and sensor leads
through the cableways in the back panel
(pos. 6, Fig. 7).
1.8 Modules
When using a modular approach, connect the
individual heat pumps via terminal BUS 1,
2, 3. Ensure that High, Low and Ground are
correctly connected at the WPM II as well as at
the heat pump.
Abb. 11
X2
X4
X3
PE
3/PE~400V 50Hz 1/N/PE~230V 50Hz
C26_03_01_0239
Wiring diagram WPF...M (Triplephase)
!
Only WPF...M (Triplphase)
The compressor can only turn in
one direction. Should the compressor fail to
start, interchange two phases to alter the
direction of rotation. You can check the
direction of rotation by means of a red
diode on the phase monitoring relay
(Fig. 11). The rotational direction is correct
if the red diode lights up.

11
C26_03_01_0238
Wiring diagram for heat pumps WPF...M (Triplephase)
Fig. 12
A2 Integrated Heat Pump control, IWS II B5 Temperature sensor Heißgas F2 High Pressure limiter F4 Temp.-limiter, hotgas F6 Phase control relay K1 Relay, resitor bridge K2 Relay, compressor start
M1 Compressor P1 High pressure transducer P3 Low pressure transducer R1 Start-Resistor R2 Start-Resistor R3 Start-Resistor X1 Terminal block
X2 Terminal block X3 Terminal block, mains X4 Terminal block, control X23 Earth terminal block X29 Block for IWS II, 12-pole X30 Block for IWS II, 3-pole X33 Block for IWS II, 5-pole Z3 Supressor element

12
X2
X4
X3
PE
1/PE~230V 50Hz 1/N/PE~230V 50Hz
C26_03_01_0687
Fig. 13
Wiring diagram WPF...MS (Singlephase)
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Electrical connection WPF...MS (single phase) with WPAB
The WPAB can be installed inside the domestic distribution panel to limit the starting current of the TTF...MS. Implement the wiring in accordance with
Fig. 11. The WPAB limits the starting current to the values stated in the specification.
!
When connecting the WPAB, remove the jumper between R and RC.
!
When using the WPAB, L (terminal X3) on the compressor and L (terminal X4) on the controller must use the same phase, and this should be
protected by an RCD
26_03_01_0256_a
Fig. 14
Mains supply 1/N/PE/ 230 V
Heat pump
X3 Power supply
HP Heat pump (compressor)
N, L, R, RC, PE
X4 Control terminals
Mains supply: L, N, PE
Control input:
Ext. control STAND ALONE operation
S
ON
N
X2 LV terminal
1 BUS High H
2 BUS Low L
3 BUS Ground
4 & 5 Temperature sensor
WPF 7 MS
System impedance: Zmax = 65 m:
WPF 10 MS
System impedance: Zmax = 54 m:
The device is compliant with IEC
61000-3-12

13
Wiring diagram for heat pumps WPF...MS (Singlephase)
C26_03_01_0685
Fig. 15
A2 Integrated Heat Pump control, IWS II
F1 Low Pressure limiter F2 High Pressure limiter F4 Temp.-limiter, hotgas K2 Relay, compressor start
M1 Compressor X1 Terminal block X2 Terminal block X3 Terminal block, mains X4 Terminal block, control X23 Earth terminal block
X28 Base luster terminal X29 Block for IWS II, 12-pole X30 Block for IWS II, 3-pole X33 Block for IWS II, 5-pole Y1 Deicing reversing valve Z1 Operating condenser, compressor

14
1.9 Commissioning
Only approved contractors may commission
this equipment and instruct the owner in its
use.
Commission the WPF...M(S) in accordance
with the installation instructions and the
installation and operating instructions of the
WPM II heat pump manager. Our customer
service can assist in the commissioning, which
is chargeable.
After commissioning, the installer should
complete the commissioning report on pages
16 to 18.
Check the following prior to commissioning:
zHeating system
Was the heating system filled to the
correct pressure, and was the quick-acting
air vent valve opened?
zTemperature sensor
Were the outside temperature and the
return temperature sensor (in conjunction
with a buffer cylinder) correctly positioned
and connected?
zPower supply (Triplephase)
Was the mains power supply properly
connected?
The rotational direction at the HP
connection (mains) is correct, if the red
diode on the phase monitoring relay lights
up, when voltage (mains) is applied to the
supply terminals.
If the diode at the phase monitoring relay
stays OFF, then the heat pump will not
start.
Then heat up the system to its maximum
operating temperature and vent again.
!
Observe the maximum system
temperature in underfloor heating
systems.
1.10 Operation and control
A WPM II heat pump manager is required to
operate the heat pump. It regulates the entire
heating system. All necessary adjustments
prior and during operation are made on this
device.
Only qualified contractors must make
adjustments listed in the commissioning
report of the WPM II heat pump manager.
!
Generally, the system does not need
to be shut down during summer, as
the WPM II implements an automatic
summer/winter changeover. Set the WPM II
to standby when the system is taken out of
use. This retains the safety functions
designed to protect the system
(e.g. frost protection).
Drain the water side of the equipment, if the
heat pump is taken out of use at a location
subject to a risk of frost.
Drain the water in the condenser via the fill &
drain valve that becomes accessible after re-
moving the equipment front.
1.11 Maintenance and cleaning
1.11.1 Maintenance
The heat pump operates under automatic
control and requires no specific maintenance.
Where heat meters are installed, frequently
clean their sieves, which block easily.
1.11.2 Cleaning
In case of heat pump faults (e.g. high pressure
limiter trips) through deposits of corrosion
products (rust sludge) inside the condenser,
only dissolving them by means of solvents
used by our customer service will remove this
problem.

15
The control panel with the “Internal heat pump
control” (IWS II) is accessible after removing
the front cover. The following lists the IWS II
adjustments required for the WPF...M(S)
Slide switches (WP-Typ)
You can choose various compressor systems
with the slide switches (WP-Typ). For the
WPF...M, this was set at the factory to 9,
subject to the heat pump type.
Where the WPF..M(S) is to be used as module
together with a further WPF..M, the slide
switches (WP-Typ) remains set to 9.
!
Check the slide switches (WP-Typ)
for correct setting.
Slide switches (S1)
The switches 1 and 2 have no effect on the
WPF...M(S) function. They remain in off
position
Switch 3 position
Switch ON: SERVICE
Corresponding compressors (defaulted by
setting the slide switches (WP-Typ)) are started
in one second intervals.
1.12 Troubleshooting
Checking the settings at the IWS II
Switch 4 position
Switch ON: STAND ALONE operation
Should the WPM II heat pump manager
develop a fault, the heat pump can, in
emergencies, be operated in stand alone
mode. In this operating mode, there is no
communication with the WPM II. The heat
pump regulates to a fixed temperature: The
heat pump starts at 50 °C and stops at 55 °C.
For this, connect 230 V to terminals X4/2
and a temperature sensor TF 6 (for part no.
see “Special accessories”, page 2) as return
sensor at sensor terminals X2/4 & 5. Insert
the sensor into the sensor well at the heating
circuit return (see Fig. 3). The operating mode
is indicated by the r.h. green LED .
!
For the stand alone operation,
remove the jumper across terminals
X4/1 and X4/2.
LEDs
Red LED: Flashing or static:
The LED flashes, if a heat pump fault occurs
only once.
The system will be shut down:
The red LED illuminates statically, if more than
five heat pump faults occur within two hours
of operation. The system will be shut down
permanently.
In both cases, the fault will be entered into
the FAULT LIST (parameter 47) of the WPM II.
Operation can starts 10 minutes after the fault
Fig. 16
LEDs
26_03_01_0661
BA
Slide switches (S1) Reset button
Slide switches (WP-Typ)
has been removed; the LED extinguishes.
To delete the faults on the IWS II, select
parameter 55, then press PRG to reset the IWS
II. The internal counter will then be returned
to zero.
Heat pump faults indicated by the LED: High
pressure fault / low pressure fault, central fault
messages and hardware faults at the IWS II
(see parameter 47).
Green LED (centre): Flashes during
initialisation, and becomes steady after the
BUS address has been allocated successfully.
Only then is the communication with WPM II
possible. This is only relevant for the WPF...M,
if the control unit is replaced, otherwise the
unit is initialised at the factory.
Green LED (right): Illuminates constantly,
when STAND ALONE operation has been
selected.
Reset button
In case of incorrect initialisation, see section
5.4.1 of the WPM II operating and installation
instructions.

16
6. Installation conditions according to Stiebel Eltron
installation and operating instructions:
Installation room volume: m³
7. Operating mode
mono mode
dual-mode - parallel
- part parallel
- alternative
Dual-mode heat source
Gas fired boiler
Oil fired boiler
Solid fuel boiler
District heating
Electric heating
8. Hydraulic connection of the
heat pump with buffer cylinder
yes no
Buffer cylinder content
9. DHW heating:
independent of HP
yes no
with external heat exchanger
yes no
with internal heat exchanger
yes no
STE products: types:
Third party products types:
1. Customer’s address:
2. Installer:
3. Building type:
Detached house
Appartment block
Apartment block/Commercial
Industrial/Commercial
Public building
Single heat pump
Cascade
4. Equipment type:
ID No:
Serial No.
Production No.
5. Heat pump location:
External
Internal Cellar
First floor
Second floor
Top floor
On concrete base
On base plate
On level ground
Horizontal: yes no
Anti-vibration mounts: yes no
Commissioning report for contractors

17
12. System periphery:
Circulation pump source
Manufacture / type /
Circulation pump heating
Manufacture / type /
Circulation pump
Heat pump/heat exchanger
Manufacture / type /
Circulation pump
Heat exchanger / cylinder
Manufacture / type /
Circulation pump heat pump/
buffer cylinder
Manufacture / type /
Circulation pump DHW
circulation
Manufacture / type /
Circulation pump heat pump/
DHW cylinder
Manufacture / type /
Mixing valve
Manufacture / type /
Mixing valve servomotor
Manufacture / type /
13. Control unit
STIEBEL-ELTRON product/type
Third party: type
Parameters set in acc. with the control unit commissioning report
14. Power supply:
Cable type:
No. of conductors
Cross-section
Installed acc. to VDE yes no
Control cable heat pump:
Cable type
No. of conductors
Cross-section:
10. Heat source:
Air Outside air
Extract air
Temperature min: °C
max: °C
Ground
Ground probe
No.
Internal pipe diameter:
Distributor: yes no
Depth of hole:
Hydraulic connections as per Tichelmann
yes no
Ground collector
Pipe length:
Diameter:
Area:
Distributor: yes no
Hydraulic connections as per Tichelmann
yes no
Process medium:
Type:
Concentration:
Frost protection:
Water Well
Surface water
Others:
11. Heating system:
Underfloor heating
Convectors
Panels
Radiators
Design temperature: FL °C/ RE °C

18
15. Actual data:
Actual at the heat pump after 10 min. operation:
Brine inlet/water/air: °C
Brine outlet/water/air: °C
Heat pump flow temp.: °C
Heat pump return temp: °C
17. System layout
Place, date
16. Tested to VDE 0701
Implemented: yes no
Values OK: yes no
Installer’s signature

19
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