CONTENTS SPECIAL INFORMATION Commissioning ��������������������������������������������� 38 13.1 Carrying out checks before commissioning the heat OPERATION pump manager 38 General information �����������������������������������������3 13.2 Commissioning the heat pump manager 38 Relevant documents 3 13.3 Settings 38 Safety instructions 3 Appliance shutdown ���������������������������������������...
SPECiaL iNfOrmaTiON General information SPECiaL iNfOrmaTiON OPEraTiON - The appliance may be used by children aged 8 General information and older and persons with reduced physical, sensory or mental capabilities or a lack of ex- The chapters "Special information" and "Operation" are intended for both users and qualified contractors.
OPEraTiON Safety Other symbols in this documentation Confirmation of the specified output data can only be obtained, if the test conducted for this purpose is also performed in ac- cordance with the test conditions defined in the first paragraph Note of this section.
OPEraTiON appliance description Appliance description Function Heat is extracted from the outdoor air via the heat exchanger Minimum software versions (evaporator) on the air side. The refrigerant evaporates and is compressed by a compressor. This process requires electrical The following minimum software versions are necessary for op- energy.
OPEraTiON Troubleshooting Troubleshooting fault Cause remedy There is no hot No power at the appli- Check the fuses/MCBs in your water or the ance. distribution board. Replace the heating system fuses/reset the MCBs if required. remains cold. Notify your qualified contractor if the fuses/MCBs blow/trip again.
iNSTaLLaTiON Safety iNSTaLLaTiON 8.1.2 WPL 19 IK | WPL 24 IK - Type plate - Compact function module WPIC 3 Casing parts for indoor installation Safety - Front panel Only a qualified contractor should carry out installation, commis- - Back panel sioning, maintenance and repair of the appliance. - Side casing General safety instructions Connection accessories...
iNSTaLLaTiON information on operating and installation instructions Information on operating and 10.2.2 Minimum clearances installation instructions Note For clarity, the various heat pumps are covered in sep- arate chapters. The chapters are named after the heat pumps to which they refer. The following chapters apply to all heat pumps.
Page 9
iNSTaLLaTiON WPL 19 I | WPL 24 I f For installation on floating screeds, make provisions for quiet AWG 560 V heat pump operation. Through an exterior wall to the outdoors with a vertical wall outlet f Isolate the installation surface around the heat pump by means of a recess.
Page 10
iNSTaLLaTiON WPL 19 I | WPL 24 I AWG 600 L Through a cellar wall into a shaft with a wall outlet 600-635 Air routing without a duct: Through an outside wall | Through two outside walls around a corner ≥300 ≥300 ≥500 ≥3000 ≥1119 | WPL 19 | WPL 24 www.stiebel-eltron.com...
Page 11
iNSTaLLaTiON WPL 19 I | WPL 24 I Air routing with a duct: Through an outside wall | Through two outside walls around a corner ≥600 ≥600 ≥300 ≥300 ≥500 ≥1000 ≥1000 ≥3000 ≥1119 Insulating the brickwork f For wiring, use cable with the relevant cross-sections. Ob- serve the applicable national and regional regulations.
iNSTaLLaTiON WPL 19 I | WPL 24 I 10.3.2 Siting Note The appliance includes an inverter for the variable speed Note compressor. In the event of a fault, inverters can cause Two screws are available at the top of the appliance frame DC residual currents. If RCDs are provided, they have to to secure the cover.
iNSTaLLaTiON WPL 19 I | WPL 24 I tion. Simply turning the screw cap by hand will secure the pipe in the connector and push the O-ring against the pipe to seal it. Making the push-fit connection The connector must be in its relaxed position before the pipe is inserted.
Page 14
iNSTaLLaTiON WPL 19 I | WPL 24 I 10.4.1 Heating water connection 10.4.4 Filling the heating system Carry out a fill water analysis before filling the system. This anal- Material losses ysis may, for example, be requested by the relevant water supply The heating system to which the heat pump is connected utility.
Page 15
iNSTaLLaTiON WPL 19 I | WPL 24 I 10.4.5 Venting the heating system 10.4.6 Minimum flow rate f Vent the pipework carefully. You can set the flow rate in heat pump mode. In order to do this, firstly make the following settings: f Temporarily remove the fuse from the electric emergency/ booster heater to isolate the emergency/booster heater from the power supply.
Page 16
iNSTaLLaTiON WPL 19 I | WPL 24 I 10.4.7 Circulation pump Condensate drain towards the left When configuring the heat pump system, follow the stated max- If a bottom drain is provided, you can drain the condensate down- imum available external pressure differentials (see the chapter wards through the "supply line entry"...
iNSTaLLaTiON WPL 19 I | WPL 24 I 10.5 Power supply 10.5.2 Heat pump connection Terminal assignment WARNING Electrocution Before working on the appliance, isolate it from the f Connect the cables in line with the following diagrams. power supply at the control panel. f Then check that the strain relief fittings are working as intended.
iNSTaLLaTiON WPL 19 I | WPL 24 I 10.6 Sealing the appliance 10.5.3 Emergency/booster heater power supply Terminal X5: Appliance and electric emergency/booster heater Note (DHC) If you want to prevent negative pressure in the instal- f Connect the electric emergency/booster heater to terminal X5 lation room, you can seal the appliance by affixing the if you want to utilise the following appliance functions: plastic screen provided.
iNSTaLLaTiON WPL 19 I | WPL 24 I 10.8 Fitting the air hoses Note In the case of heat pumps installed indoors, if a blow- er door test to EN 13829 is to be carried out, then all apertures which are purposely provided in the building envelope must be closed or sealed off before the air hoses are installed.
Page 20
iNSTaLLaTiON WPL 19 I | WPL 24 I f Push the inner hose halfway down the connector. f With the sound-optimised hoses (LSWP 560-4 S), seal the sheet to the connector using the fabric tape provided. f Place the sealing strip provided around the connector. f Seal the inner hose by affixing it to the connector using the fabric tape provided.
iNSTaLLaTiON WPL 19 IK | WPL 24 IK 11. WPL 19 IK | WPL 24 IK 11.2.2 Minimum clearances 11.1 Safety Operation of the appliance in buildings with combustion equipment As the appliance can produce negative pressure in the installation room, we recommend using a tightly sealing door between the installation room and the living space for operation with com- bustion equipment.
Page 22
iNSTaLLaTiON WPL 19 IK | WPL 24 IK f For installation on floating screeds, make provisions for quiet mCB/fuse assignment Cable cross-section rating heat pump operation. 16 A 2.5 mm² f Isolate the installation surface around the heat pump by 1.5 mm² for only two live wires and rout- means of a recess.
iNSTaLLaTiON WPL 19 IK | WPL 24 IK 11.3 Installation 11.3.4 Heating water connection 11.3.1 Transport Material losses The heating system to which the heat pump is connected f When transporting the appliance, be aware of its centre of must be installed by a qualified contractor in accordance gravity.
Page 24
iNSTaLLaTiON WPL 19 IK | WPL 24 IK 11.3.7 Filling the heating system 11.3.8 Venting the heating system f Vent the pipework carefully. Carry out a fill water analysis before filling the system. This anal- ysis may, for example, be requested by the relevant water supply utility.
Page 25
iNSTaLLaTiON WPL 19 IK | WPL 24 IK Note The table applies if individual room control is installed. Sizing recommendation for the underfloor heating system in the lead room: minimum flow minimum water content of the Composite pipework 16 x 2 mm Composite pipework 20 x 2.25 mm rate buffer cylinder or the open cir- / clearance 10 cm...
iNSTaLLaTiON WPL 19 IK | WPL 24 IK 11.4 Power supply Condensate drain towards the left If a bottom drain is provided, you can drain the condensate down- WARNING Electrocution wards through the "supply line entry" in the bottom of the appli- Before working on the appliance, isolate it from the ance.
iNSTaLLaTiON WPL 19 IK | WPL 24 IK 11.4.2 Heat pump connection 11.4.3 Emergency/booster heater power supply Terminal assignment Terminal X5: Appliance and electric emergency/booster heater (DHC) f Connect the cables in line with the following diagrams. f Connect the electric emergency/booster heater to terminal X5 f Then check that the strain relief fittings are working as if you want to utilise the following appliance functions: intended.
iNSTaLLaTiON WPL 19 IK | WPL 24 IK 11.6 Sealing the appliance Note If you want to prevent negative pressure in the instal- lation room, you can seal the appliance by affixing the plastic screen provided. f Remove the backing from the adhesive strips on the frame and on the plastic screen.
iNSTaLLaTiON WPL 19 A | WPL 24 A 12. WPL 19 A | WPL 24 A Material losses Please note that both the flow of outdoor air into the 12.1 Preparations appliance, and the flow of exhaust air from the appliance must be unimpeded. If the air intake and discharge of the appliance are ob- 12.1.1 Sound emissions structed by surrounding objects, this may cause a thermal The appliance is louder on the air intake and air discharge sides...
Page 30
iNSTaLLaTiON WPL 19 A | WPL 24 A Foundations with recess Example: Routing pipes in the base 1340 A Depth of frost line 1 Heating circuit flow 2 Heating circuit return 3 Conduit for supply lines/cables 4 Foundation 5 Gravel bed 6 Drainage pipe 7 Condensate drain hose 8 Electrical cables/leads Observe the following information:...
iNSTaLLaTiON WPL 19 A | WPL 24 A 12.2 Installation WARNING Electrocution Only use a permanent connection to the power supply. 12.2.1 Transport Ensure the appliance can be separated from the power f When transporting the appliance, be aware of its centre of supply by an isolator that disconnects all poles with at gravity.
Page 32
iNSTaLLaTiON WPL 19 A | WPL 24 A f Remove the knock-out "supply line entry" in the bottom of 12.2.4 Flow and return connection the appliance. f Position the standard appliance on the prepared substrate. f Observe minimum clearances (see chapter "Preparations / Minimum clearances"). f Route the supply pipes/cables from below through the knock- out in the bottom and into the appliance.
Page 33
iNSTaLLaTiON WPL 19 A | WPL 24 A 12.2.6 Oxygen diffusion Material losses Avoid open vented heating systems and underfloor heat- ing systems with plastic pipes which are permeable to oxygen. In underfloor heating systems with plastic pipes that are per- meable to oxygen and in open vented heating systems, oxygen diffusion may lead to corrosion on the steel components of the heating system (e.g. on the indirect coil of the DHW cylinder, on buffer cylinders, steel radiators or steel pipes).
Page 34
Number of cir- floor area cuits floor area cuits m² n x m m² n x m WPL 19 A 1000 WPL 24 A 1000 Buffer cylinder always recommended buffer cylinder recommended buffer cylinder activate the integral required volume, underfloor heating...
iNSTaLLaTiON WPL 19 A | WPL 24 A 12.2.11 Circulation pump 12.2.14 High limit safety cut-out for underfloor heating systems When configuring the heat pump system, follow the stated max- Material losses imum available external pressure differentials (see the chapter In order to prevent excessively high flow temperatures "Specification / Data table").
Page 36
iNSTaLLaTiON WPL 19 A | WPL 24 A 12.3.1 Connecting electrical cables 12.3.2 Heat pump connection Terminal assignment Note In the appliance there are cable clamps that you can use f Connect the cables in line with the following diagrams. for routing the electric cables. f Then check that the strain relief fittings are working as intended.
iNSTaLLaTiON WPL 19 A | WPL 24 A 12.4 Fitting casing parts 12.3.3 Emergency/booster heater power supply Terminal X5: Appliance and electric emergency/booster heater (DHC) f Connect the electric emergency/booster heater to terminal X5 if you want to utilise the following appliance functions: appliance func- Effect of the electric emergency/booster tion heater...
iNSTaLLaTiON Commissioning 13. Commissioning 13.2 Commissioning the heat pump manager Commission the heat pump manager and make all settings in ac- A WPM heat pump manager is required to operate the appliance. cordance with the heat pump manager operating and installation All necessary adjustments prior to and during operation are made instructions.
iNSTaLLaTiON appliance shutdown 15. Appliance handover 13.3.1 Other settings f For operation with and without a buffer cylinder, see chapter Explain the appliance function to users and familiarise them with "Operation / Menu structure / Menu SETTINGS / STANDARD its operation. SETTING / BUFFER OPERATION" in the WPM operating and installation instructions.
iNSTaLLaTiON Troubleshooting 16.1 Controls on the IWS f Check whether the DIP switch is set correctly. The IWS helps you to troubleshoot if the fault cannot be identified DIP switch (BA) using the WPM. The heat pump operating mode is set using the DIP switch (BA). f Check whether the DIP switch is set correctly.
iNSTaLLaTiON maintenance 17. Maintenance 16.2.1 Reset button If the IWS was not initialised successfully, you can reset it with the reset button. See chapter "Reinitialising IWS" in the heat pump WARNING Electrocution manager operating and installation instructions. Before removing the casing parts, disconnect all poles of the appliance from the power supply.
Page 42
iNSTaLLaTiON maintenance f Remove the bottom cover. f Clean out the rear section of the condensate pan. f Clean out the front section of the condensate pan. f Check the hose and the condensate drain pipe, and remove all contaminants and blockages. f When installed indoors, carefully re-affix the foil to the appli- ance frame.
iNSTaLLaTiON Specification WPL 19 IK | WPL 24 IK 300-500 300-500 1240 400 ±50 Cable entry Safety assembly Heating flow Male thread G 1 1/4 Heating return Male thread G 1 1/4 Cylinder flow Male thread G 1 1/4 Cylinder return Male thread G 1 1/4 Air intake Air discharge | WPL 19 | WPL 24...
iNSTaLLaTiON Specification WPL 19 A | WPL 24 A Air intake Air discharge Entry supply line www.stiebel-eltron.com WPL 19 | WPL 24 |...
Page 46
iNSTaLLaTiON Specification 18.2 Wiring diagram WPL 19 I | WPL 24 I | WPL 19 A | WPL 24 A L1 L2 L3 N L1 L2 L3 N ON ERR L S2 S3 L1 L2 OUT OUT OUT (IWS III > p L1 L2 RS 485 T >...
iNSTaLLaTiON Specification 18.4 Output diagrams WPL 19 I | WPL 19 IK | WPL 19 A Heating output X Outside temperature [°C] Y Heating output [kW] 1 max. W55 2 max. W35 3 min. W55 4 min. W35 DHW output X Outside temperature [°C] Y DHW output [kW] 1 max.
iNSTaLLaTiON Specification 18.5 Output diagrams WPL 24 I | WPL 24 IK | WPL 24 A Heating output X Outside temperature [°C] Y Heating output [kW] 1 max. W55 2 max. W35 3 min. W55 4 min. W35 DHW output X Outside temperature [°C] Y DHW output [kW] 1 max.
The power consumption of the integral auxiliary drives represents the maximum value and may vary subject to operating point. The power consumption of the integral auxiliary drives is included in the output data for the appliance (to EN 14511). WPL 19 I WPL 19 IK WPL 19 a WPL 19 WPL 24 I WPL 24 IK WPL 24 a...
Page 52
Specification WPL 19 I WPL 19 IK WPL 19 a WPL 19 WPL 24 I WPL 24 IK WPL 24 a WPL 24 a Sr a Sr Sound emission data Sound power level for indoor installation (EN 12102) dB(A) Max. sound power level for indoor installation dB(A)
Page 53
Specification WPL 19 I WPL 19 IK WPL 19 a WPL 19 WPL 24 I WPL 24 IK WPL 24 a WPL 24 a Sr a Sr Water quality requirements Water hardness °dH ≤3 ≤3 ≤3 ≤3 ≤3 ≤3 ≤3 ≤3 pH value (with aluminium fittings) 8.0-8.5 8.0-8.5...
GUARANTEE | ENVIRONMENT AND RECYCLING Guarantee The guarantee conditions of our German companies do not apply to appliances acquired outside of Germany. In countries where our subsidiaries sell our products a guarantee can only be issued by those subsidiaries. Such guarantee is only grant- ed if the subsidiary has issued its own terms of guarantee.
Need help?
Do you have a question about the WPL 24 A and is the answer not in the manual?
Questions and answers