Stiebel Eltron WPL 15-25 A2W Premium Air Source Heat Pump

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 experience and know-how, provided that they are supervised or they have been instructed on how to use the appliance safely and have understood the potential risks. Children must never play with the appliance. Children must never clean the appliance 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 supply by an isolator that disconnects all poles with at least 1/8" (3 mm) contact separation.

Maintain the minimum clearances to ensure trouble-free operation of the appliance and facilitate maintenance work.

Maintenance work, such as checking the electrical safety, must only be carried out by a qualified contractor.

We recommend regular inspection (to establish the current condition of the system), and maintenance by a qualified contractor if required (to return the system to its original condition).

Following disconnection from the power supply, parts of the appliance may remain energized for 2 minutes until the inverter capacitors have discharged.

Never interrupt the power supply, even outside the heating season. The system's active frost protection is not guaranteed if the power supply is interrupted.

If the heat pump is completely switched off and there is a risk of frost, drain the system on the water side.

1. General Information

The chapters "Special Information" and "Operation" are intended for both users and qualified contractors. The chapter "Installation" is intended for qualified contractors.

ℹ️ Note: Read these instructions carefully before using the appliance and retain them for future reference. Pass on the instructions to a new user if required.

1.1 Relevant Documents

• Instructions for the WPM heat pump manager
• Operating and installation instructions for system components
• Commissioning checklist for heat pump

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

⚠️ Injury

⚡ Electrocution

1.2.3 Keywords

1.3 Other Symbols in this Documentation

ℹ️ Note: General information is identified by the adjacent symbol. Read these texts carefully.

▶️ This symbol indicates that you have to do something. The action you need to take is described step by step.

1.4 Units of Measurement

ℹ️ Note: All measurements are given in inches and (mm) unless stated otherwise.

1.5 Standardized Output Data

Information on determining and interpreting the specified standardized output data.

1.5.1 AHRI 550/590

The output data specifically mentioned in texts, diagrams and technical data sheets has been calculated according to the test conditions of the standard shown in the heading of this section.

Generally, the test conditions stated above will not fully match the conditions found at the installation site of the system user.

The usage of antifreeze glycol is strongly recommended. It has an influence on the efficiency and heat capacity, depending on the concentration of glycol.

Depending on the chosen test method and the extent to which this method differs from the test conditions defined in the first paragraph of this section, any deviations can be considerable.

Confirmation of the specified output data can only be obtained if the test conducted for this purpose is also performed in accordance with the test conditions defined in the first paragraph of this section.

2. Safety

2.1 Intended Use

Observe the application limits listed in chapter "Specification / Data table".

The appliance is intended for domestic use. It can be used safely by untrained persons. The appliance can also be used in a non-domestic 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 inappropriate. Observation of these instructions and of instructions for any accessories used is also part of the correct use of this appliance.

2.2 Safety Instructions

Observe the following safety instructions and regulations.

• Only qualified contractors may carry out the electrical work and installation of this appliance.
• The qualified contractor is responsible for adherence to all applicable regulations during installation and commissioning.
• The appliance should only be operated once it is fully installed and all safety equipment has been fitted.
• Protect the appliance from dust and dirt during building work.

⚠️ WARNING Injury The appliance may be used by children over 8 years of age and persons with reduced physical, sensory or mental capabilities or a lack of experience and expertise, provided that they are supervised or they have been instructed on how to use the appliance safely and have understood the potential risks. Children must never play with the appliance. Children must never clean the appliance or perform user maintenance unless they are supervised.

⚠️ WARNING Injury For safety reasons, only operate the appliance with the casing closed.

⚠️ WARNING Electrocution Contact with live components presents a threat to life. Damage to the electric insulation or to individual components may result in a threat to life. If there is damage to the insulation, disconnect the power supply and arrange a repair. All work on the electrical installation must be carried out by a qualified contractor.

⚠️ WARNING Scalding The water in the DHW tank can be heated to temperatures in excess of 149°F (65°C). There is a risk of scalding at outlet temperatures in excess of 110°F (43°C). Ensure you do not come into contact with the water when discharged.

⚠️ WARNING Burns Touching hot components can lead to burns. When working on hot components, always wear protective working clothing and safety gloves. The pipework connected to the DHW outlet of the appliance can reach temperatures in excess of 149°F (65°C).

⚠️ WARNING Burns In the case of a fault, temperatures up to the high limit safety cut-out temperature limit can occur (See 18.6, "Data table", pg. 37).

⚠️ WARNING Scalding The appliance is filled with refrigerant at the factory. In case of leaking refrigerant, avoid coming into contact with the refrigerant or inhaling the released vapors. Ventilate the affected spaces.

⚠️ CAUTION Injury Never place any objects on top of the appliance. If objects are left on the appliance, noise emissions may increase due to resulting vibrations, and the objects could fall and cause injury.

⚠️ CAUTION To reduce the risk of excessive pressures and temperatures in this water heater, install temperature and pressure protective equipment required by local codes and no less than a combination temperature and pressure relief valve certified by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment or materials, as meeting the requirements for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems, ANSI Z21.22. This valve must be marked with a maximum set pressure not to exceed the marked maximum working pressure of the water heater. Install the valve into an opening provided and marked for this purpose in the water heater, and orient it or provide tubing so that any discharge from the valve exits only within 6 inches above, or at any distance below, the structural floor, and does not contact any live electrical part. The discharge opening must not be blocked or reduced in size under any circumstances.

⚠️ Material losses Only operate the appliance when the DHW tank has been filled with water.

⚠️ Material losses If you disconnect the appliance from the power supply, it is no longer protected against frost. ▶️ Do not interrupt the power supply to the appliance.

⚠️ Material losses Never cover this appliance. Covering the air intake or air discharge leads to a reduced air supply. If the air supply is restricted, the operational reliability of the appliance cannot be guaranteed.

⚠️ Material losses Heating liquids other than potable water or a water/propylene glycol mixture is not permitted.

3. Register Your Product

ℹ️ Note: You must register this product within 90 days of purchase on our web site in order to activate the standard warranty or to be eligible for the extended warranty. Go to our web site at www.stiebel-eltron-usa.com and click on register your product.

Before beginning the registration process, we suggest that you gather the necessary information which will be as follows:

1. Serial number on the type plate (the type plate label is located at the top left of the unit when facing the air outlet)
2. Type, Example: WPL A2W 15 Premium
3. Number listed after "Nr."
4. Place of Purchase
5. Purchase Date
6. First & Last Name
7. Email address
8. Physical Address
9. Phone Number
10. Installation Date

If you have any questions concerning the registration process or warranty options, please contact Stiebel Eltron USA directly at (800)-582-8423.

4. Appliance Description

4.1 Properties

The appliance is an air source heat pump that operates as a heating or cooling heat pump for outdoor installation. Heat is extracted from the outdoor air at a low temperature level, and is then transferred to the heating water at a higher temperature. The heating water can be heated up to a flow temperature of 149°F (65°C).

The appliance is equipped with an electric emergency/booster heater (NHZ). To ensure heating operation and the provision of high DHW temperatures, the electric emergency/booster heater is activated as an emergency heater if the dual mode point is undershot in mono mode operation. If the same thing happens in mono energetic operation, the electric emergency/booster heater is activated as a booster heater.

This appliance has further operational characteristics:

• Suitable for underfloor and radiator heating systems.
• Preferred for low temperature heating systems.
• Extracts heat from the outdoor air even at outside temperatures of -4°F (-20°C).
• Corrosion-protected, external casing made from hot-dipped galvanized sheet steel plus powder coated finish.
• Comprises all components and safety equipment required for operation.
• Filled with non-combustible safety refrigerant.
• The product is delivered without a cord.

4.2 Function

4.2.1 Heating

Heat is extracted from the outdoor air via the heat exchanger (evaporator) on the air side. The evaporated refrigerant is compressed by a compressor. This process requires electrical energy. At this point, the refrigerant is at a higher temperature and pressure level. A further heat exchanger (condenser) transfers the heat to the heating circuit. The refrigerant then passes an electronically controlled expansion valve, expands again, and the cycle restarts from the beginning.

If the ambient air temperature drops below 45°F (7°C), the moisture of the air freezes on the evaporator fins and hoarfrost builds up.

The amount of hoarfrost build up depends on the relative humidity of the air, and is automatically defrosted from time to time. Water created by this defrosting process collects in the heated defrost pan and is drained off.

⚠️ Material losses It is strongly recommended to install a buffer tank. The buffer tank acts like an air separator, and a proper flow rate is provided to avoid high pressure failure. During the defrost cycle, the fan is switched off and the heat pump circuit is reversed. The heat required for defrosting is drawn from the buffer tank.

The heat pump automatically reverts to heating mode at the end of the defrost cycle.

⚠️ Material losses In dual mode operation, return water from the second heat generator may flow through the heat pump. Please note that the return temperature must be no higher than 140°F (60°C).

4.2.2 Cooling

Rooms are cooled by reversing the heat pump circuit. Heat is extracted from the heating water and the evaporator transfers this heat to the outdoor air.

Area cooling and fan cooling require the installation of a remote control unit (FET) in a reference room to capture the relative humidity and the room temperature as part of dew point monitoring.

With fan cooling, it is also necessary to install a buffer tank.

Heat pump application limit The heat pump is switched off if the ambient temperature is below -4°F (-20°C) in heating mode, or the selected lower application limit for cooling (COOLING LIMIT parameter). The appliance is intended to be used at an altitude of up to 6,561 ft (2000 m).

⚠️ Material losses The heat pump is not suitable for continuous, year-round cooling. Observe the application limits (see chapter "Specification / Data table").

⚠️ Material losses In cooling mode, condensate can form when the dew point temperature is undershot. Take suitable measures to prevent the formation of condensate.

5. Settings

The system is operated exclusively via the WPM heat pump manager.

If the Heat pump is delivered with a system tank HSBC Integral, the WPM is integrated in the indoor system tank assembly, and the WPM is configured with default parameter setting for the complete system. If the heat pump is delivered without a HSBC Integral system tank an SD card is delivered with the WPM for initial setup.

SD card default Parameter setting:

• The heating curve default value is set for low energy applications: 0.6 (10°F [-12.2°C] ambient temperature means 113°F [45°C] leaving water temperature)
• The DHW temperature setting default value is 140°F (60°C).
• Summer mode for cooling is activated at 78°F (26°C) ambient air temperature.

Adjust the heating curve for buildings built to a lower insulation standard to 1.0. An ambient temperature of -4°F (-20°C) results in a 149°F (45°C) leaving water temperature.

In cooling applications, an FET (remote control) is required.

The FET needs to be installed in a reference room of the building to detect the room temperature and relative humidity.

If an FET is installed, the set point value for the leaving water temperature of the heat pump is controlled using the room temperature sensor information. The room temperature sensor is integrated inside the FET.

ℹ️ Note: To adjust the default settings of the WPM, please observe the instructions for the WPM unit.

6. Maintenance and Care

⚠️ Material losses Maintenance work, such as checking the electrical safety, may only be carried out by a qualified contractor.

A damp cloth is sufficient for cleaning all plastic and sheet metal parts. Never use abrasive or corrosive cleaning agents.

Regularly check the condensate drain (visual inspection). Remove any contaminants and blockages immediately.

7. Troubleshooting

A diagram shows the outdoor unit with a fan and compressor. An inspection port is labeled '1'.

⚠️ Material losses Keep the air discharge and intake apertures free from snow and leaves.

Remove any leaves or other foreign bodies from the evaporator fins periodically.

We recommend a regular inspection (to establish the current condition of the system), and maintenance by a qualified contractor as required (to restore the system to the ideal condition).

ℹ️ Note: Even when the condensate has been drained correctly, it is not unusual for water to drip from the appliance onto the ground.

If you cannot solve the problem, contact your qualified contractor. To facilitate and speed up your request, provide the number from the type plate. The type plate is located at the top left-hand side of the casing, when facing the air outlet. Please contact Stiebel Eltron technical support at (800)-582-8423 or (413)-247-3380.

Sample type plate: A diagram shows a typical product type plate with fields for model, serial number, and other details. It includes text like "Made in Germany" and a serial number example "XXXXXXXXXX".

Installation

8. Safety

Only a qualified contractor should carry out installation, commissioning, maintenance and repair of the appliance.

8.1 General Safety Instructions

We guarantee trouble-free function and operational reliability only if original accessories and spare parts intended for the appliance are used.

8.2 Instructions, Standards and Regulations

ℹ️ Note: Observe all applicable national and regional regulations and instructions.

The appliance is tested according to:

• IEC 61000-3-11
• UL 60335-2-40:2017 Ed.2
• UL 60335-1:2016 Ed.6
• CSA C 22.2 60335-2-40: 2012 Ed.1+U1
• CAN/CSA E 60335-1/4E issued 2003/04/01 Ed.4
• AHRI Standard 550/590 (I-P)-201
• Energy star tested according to AHRI 550/590 2018

9. Appliance Description

The appliance offers frost protection for the water driven pipe connection tubing. The integral frost protection circuit starts the circulation pump in the heat pump circuit automatically at a condenser temperature of 46°F (8°C), and thereby ensures circulation in all water-carrying sections. If the temperature inside the buffer tank drops, the heat pump starts automatically no later than when the temperature falls below 41°F (+5°C).

A mixture of at least 25% polypropylene glycol/water is required to protect against frost damage during a power outage and to avoid system corrosion issues. The concentration should be not less than 25%.

9.1 Accessories

• Required accessories: WPM heat pump manager
• Additional accessories: FET remote control, HZB 2 ribbon heater, SK 1 T-support, WK 2 Wall-mount, AS-WP connection set, item no. 203247

10. Preparation

A diagram shows the outdoor unit positioned in front of a wall, illustrating clearances. It indicates that the appliance is designed for siting in front of a wall and to observe minimum clearances. If installed in an open space or on a roof, protect the air intake side by erecting a wall to shield it against the wind.

10.1 Sound Emissions

The appliance is louder on the air intake and air discharge sides than on the two enclosed sides. Take the following information into account when selecting the installation location.

ℹ️ Note: For details regarding the sound power level, see chapter "Specification / Data table".

• Lawn areas and shrubs help reduce the spread of noise.
• Noise propagation can also be reduced through dense Palisades or similar objects.
• Ensure that the entire appliance frame is in full contact with the substrate. Uneven substrates can increase sound emissions.
• Ensure that the air intake direction is the same as the dominant wind direction. Air should not be drawn in against the wind.
• Ensure that the air intake and air discharge are never directed towards noise-sensitive rooms of the house, e.g. bedrooms, or neighboring houses.
• Avoid installation on large, echoing floor areas, e.g. tiled floors.
• Avoid installation between reflective building walls. Reflecting building walls can increase the noise level.

10.2 Minimum Clearances

A diagram illustrates minimum clearances around the unit for single installations and for cascaded installations, with dimensions provided in inches and millimeters. It emphasizes maintaining these clearances for trouble-free operation and maintenance.

▶️ Maintain the minimum clearances to ensure trouble-free operation of the appliance and facilitate maintenance work.

❌ Never install the appliance in a recess. Two sides of the appliance must remain exposed.

⚠️ Material losses Please note that both the flow of outdoor air into the appliance, and the flow of exhaust air from the appliance must be unimpeded. If the air intake and discharge of the appliance are obstructed by surrounding objects, this may cause a thermal short circuit.

10.3 Installation Near Ocean/Salt Water

A diagram shows the prevailing wind direction relative to the unit and a minimum distance from the sea. It advises protecting flow and return lines against frost and using anti-vibration insulation for pipe fixings.

ℹ️ Note: When routing the condensate hose, observe chapter "Installation / Condensate drain".

10.4 Preparing the Installation Location

⚠️ WARNING Injury The discharged cold air can cause condensation to be formed in the vicinity of the air outlet. Ensure that no risk of slipping due to wet conditions or ice formation occurs on adjacent footpaths and driveways at low temperatures.

• Observe chapter "Sound emissions".
• Ensure that the appliance is accessible from all sides.
• Ensure that the mounting surface is level, even, solid and permanent.
• Provide a recess (space) in the base to enable supply lines to be routed into the appliance from below.

⚠️ Material losses Ensure that all electric cables, connections, and conduit are placed and secured in such a way to keep them free of damage during lawn cutting or landscaping operations.

10.5 Installing the Supply Lines

The supply lines are all electric cables plus the flow and return lines.

• To facilitate connection to the appliance, use flexible supply lines in the case of outdoor installation.
• Also protect all supply lines against humidity, damage and UV radiation by means of a conduit.
• Use only weatherproof cables, e.g. NYY.

10.6 Siting

• When siting the appliance, observe the air discharge direction.
• To avoid mold buildup, make sure that the appliance does not blow cold air directly towards building structures.
• Position the appliance on the prepared mounting surface or on a suitable support.

10.6.1 Siting on a Slab Foundation

ℹ️ Note: Allow the conduits for the supply lines to protrude slightly above the slab. Ensure that no water can enter the conduit.

Foundations with recess (WPL 15 A2W Premium): A diagram shows a foundation slab with dimensions and a recess for supply lines and condensate drain. It lists components like Air intake, Air discharge, Main wind direction, Supply line recess, and Condensate drain hole.

Foundations with recess (WPL 25 A2W Premium): Similar diagram to the WPL 15, showing dimensions and recess details.

Installation on foundations: A diagram shows the unit mounted on concrete foundations. It details measurements for frost line, heating flow/return, and condensate drain conduit.

ℹ️ Note: Installation directly on foundations is not recommended in climates where snow buildup is a concern. Excessive snow buildup may block the air intake of the WPL and interrupt normal operation. If installing in such a climate, consider one of the alternative installation options presented in this manual.

A diagram shows how to hook brackets into the unit for securing it to foundations. It advises using correct brackets and securing the appliance with suitable rawl plugs and screws.

10.7 WPM Heat Pump Manager

A WPM heat pump manager is required to operate the appliance. This controls the entire heating system. If the heat pump is installed with the indoor HSBC Integral system tank, a WPM is included with preset parameters for easy initial setup. If the installation is carried out without an HSBC tank, a WPM controller needs to be installed. The WPM controller is delivered with an SD card for initial parameter settings.

Observe the WPM installation instructions during installation.

10.8 Buffer Tank

⚠️ Material losses A buffer tank with diffusion-proof insulation is essential to enable cooling by means of fan convectors. The emergency/booster heater must be connected.

We recommend the use of a buffer tank to ensure trouble-free appliance operation.

The buffer tank provides hydraulic separation of the volume flows in the heat pump circuit and heating circuit, and also serves as an energy source for defrosting. A buffer volume of at least 25 gal (94.6 l) per heat pump is required to provide adequate defrost energy.

10.9 Preparing the Electrical Installation

⚠️ 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 1/8" (3 mm) contact separation. This requirement can be met by contactors, isolators, fuses, etc.

⚠️ Material losses The specified voltage must match the mains voltage. Observe the type plate.

⚠️ Material losses Provide separate fuses/MCBs for the three power circuits, i.e. those of the appliance, the control unit and the electric emergency/booster heater.

Use cables with the relevant cross-sections. Carry out the field wiring according to NEC. Use SJT type cable for outdoor applications. The cable needs to be UV and oil resistant.

The electrical data can be found in the chapter "Specification". A shielded 4-wire 18 AWG cable is required for the data bus connection.

ℹ️ Note: The appliance includes an inverter for the variable speed compressor. In the event of a fault, inverters can cause DC residual currents. If RCDs are provided, they must be type B AC/DC-sensitive. A DC residual current can block type A RCDs. Ensure that the appliance power supply is disconnected from the distribution board.

11. Installation

ℹ️ Note: The device is designed in such a way that it can be positioned and connected without removing the cover or side panels.

11.1 Transport

• When transporting the appliance, be aware of its center of gravity. The center of gravity is in the area where the compressor is located.
• Protect the appliance against heavy impact during transport.
• Use the recessed grips provided on the sides of the appliance.

A diagram shows the unit being tilted for transport. It advises that tilting should be brief and on its longitudinal side, with the compressor on the upper side. Prolonged tilting can redistribute refrigerant oil. Wait approximately 30 minutes after tilting before starting the appliance.

11.2 Heating Water Connection

⚠️ Material losses The heating system to which the heat pump is connected must be installed by a qualified contractor in accordance with the water installation drawings that are part of the technical guide.

To facilitate connection to the heating system, push-fit connectors are enclosed with the appliance (see chapter "Fitting the push-fit connectors"). Use the 1 inch copper tubes delivered with the heat pump. They are expanded on the installation side for soldering. The non-expanded end of the tube needs to fit in the push-fit connector. For soldering, remove the copper tubes from the push fit connector.

▶️ Before connecting the heat pump, flush the pipework thoroughly with suitable water. Foreign bodies, such as welding pearls, rust, sand or sealant can impair the operational reliability of the heat pump.

▶️ Connect the heat pump on the heating side. Check for tightness.

▶️ Make sure that the tube connections are correct: the leaving water tube (hot) is on the right-hand side, and the incoming (cold) is on the left-hand side.

▶️ Provide thermal insulation for the pipes in accordance with applicable regulations.

▶️ When sizing the heating circuit, observe the internal pressure differential (see chapter "Specification / Data table").

11.3 Flow and Return Connection

⚠️ Material losses In cooling mode, condensate can form when the dew point temperature is undershot. Take suitable measures to prevent the formation of condensate.

A diagram shows the connection ports on the unit: 1 Leaving water port (hot), 2 Heating return (cold), 3 Drain, 4 Purge valve.

▶️ Connect the heat pump to the heating circuit. Check for tightness.

11.4 Fitting the Push-Fit Connectors

ℹ️ Note: The plastic push-fit connectors are not suitable for installation in the DHW line or the solar circuit. Install the push-fit connectors only in the heating circuit.

⚠️ Material losses Tighten the screw cap of the push-fit connector by hand. Never use a tool.

How the push-fit connectors work: The connectors have a retainer with stainless steel serrations and an O-ring for sealing. They feature a "twist and secure" function. Turning the screw cap by hand secures the pipe and seals it.

Making the push-fit connection: The connector must be in its relaxed position (small gap between screw cap and main body) before inserting the pipe. A diagram shows the components: 1 Retainer, 2 Screw cap, 3 Gap, 4 Main body.

Diagrams show pipe diameter and insertion depth.

⚠️ Material losses Pipe ends must be de-burred. Use a pipe cutter to trim pipes.

▶️ Push the pipe past the O-ring into the push-fit connector until it reaches the prescribed insertion depth.

▶️ Tighten the screw cap by hand against the main body as far as it will go. This secures the push-fit connection.

Undoing the push-fit connection: Turn the screw cap anti-clockwise until a narrow gap of approx. 1/16" (2 mm) appears. Press the retainer back and pull out the pipe.

11.5 Oxygen Diffusion

⚠️ Material losses Do not use this device in open vented heating systems. Use oxygen diffusion-proof pipes in heating systems with plastic pipework.

In heating systems with plastic pipes permeable to oxygen and in open vented systems, oxygen diffusion may lead to corrosion on steel components (e.g., indirect coil of DHW tank, buffer tanks, radiators, steel pipes).

▶️ With heating systems permeable to oxygen, separate the heating system between the heating circuit and the buffer tank using an indirect heating coil or plate heat exchanger.

⚠️ Material losses The products of corrosion (e.g., rusty sludge) can settle in heating system components, potentially causing lower output or fault shutdowns due to reduced cross-sections.

11.6 Filling the Heating System

Carry out a fill water analysis before filling the system. This analysis may be requested from the relevant water supply utility.

Use propylene glycol for boiler applications with a minimum concentration of 25% for frost protection. Do not use automotive glycol, as it causes deposits and may destroy the heat exchanger.

The glycol concentration depends on the coldest ambient temperatures experienced locally.

The water system must contain a mixture of inhibited glycol and water with thermal protection sufficient for the coldest expected temperature for the installation. The inhibitor level can degrade over time and may need periodic adjustment. The inhibitor is essential to prevent glycol from accelerating corrosion of metal components. Glycol and inhibitor levels must be checked regularly (no less than once annually).

⚠️ Material losses To avoid damage from scaling, it may be necessary to soften or desalinate the fill water. The fill water limits specified in "Specification / Data table" must always be observed.

Recheck these limits 8-12 weeks after commissioning, every time the system is topped up, and during annual service.

ℹ️ Note: If water with a conductivity greater than 1000 µS/cm is used, desalination treatment is recommended to avoid corrosion.

ℹ️ Note: If you treat the fill water with inhibitors or additives, the same limits apply as for desalination.

ℹ️ Note: Suitable appliances for water softening and desalinating, as well as for filling and flushing heating systems, can be obtained from trade suppliers.

▶️ Fill the heating system via the drain (see chapter "Specification / Dimensions and connections").

▶️ Add water to the system as needed to raise the pressure to 29 PSIG (verify that all system components are suitable for this pressure). Verify that the pressure remains constant for at least one hour. Locate and correct any leaks.

11.6.1 Venting the Heating System

▶️ Before you fill the system, open the high point purge valve to vent the air during filling.

▶️ Also open the purge valve on the heat pump.

A diagram shows the rear of the unit with a purge valve labeled '1'.

11.7 Minimum Flow Rate

The minimum flow rate and the defrost energy must always be maintained (see chapter "Specification / Data table").

11.8 Setting the Flow Rate on the Heating Side

⚠️ Material losses Never operate the system without a buffer tank so as to ensure proper flow rate for the heating system. The buffer tank ensures there is always enough thermal energy to defrost the evaporator when called for. If a buffer tank is not used, the condenser may freeze under defrost mode and lead to a complete loss of refrigerant. Repair costs for such a failure are not covered under the product warranty.

The setting must be made when only the heat pump is operating. In order to do this, first make the following changes:

• Temporarily remove the fuse from the electric emergency/booster heater to isolate the emergency/booster heater from the power supply. Alternatively, switch OFF the second heat source.
• Operate the appliance in heating mode.

The flow rate is set automatically via the self-regulating system (see menu "COMMISSIONING / HEATING / SPREAD CONTROL / STANDBY PUMP RATE" in the heat pump manager).

In heat pump mode, a fixed temperature rise between the heat pump flow and return is set (see menu "COMMISSIONING / HEATING / SPREAD CONTROL" in the heat pump manager).

Checking the flow rate

• Set parameter STANDBY PUMP RATE to 100%.
• Set buffer operation to OFF.
• The current flow rate can be called up in the menu "INFO / INFO HEAT PUMP / PROCESS DATA" under "WP WATER FLOW RATE".
• Compare the value with the specification (see chapter "Specification / Data table").
• If the specified flow rate is not met, take suitable measures to increase the flow rate up to the minimum required value.
• Reset the parameters to their original values

⚠️ Material losses A buffer tank with diffusion-proof insulation is essential to enable cooling by means of fan convectors.

11.9 Condensate Drain

A condensate drain connector is factory-fitted to the defrost pan to enable the connection to a 1-1/8" (28.5 mm) ID condensate drain line.

A diagram shows the outdoor unit with the condensate drain port labeled '1'.

• Observe chapter "Electrical connection / Ribbon heater".
• If the appliance is sited on a slab, the condensate drips freely into the condensate drain pipe.
• If the appliance is mounted on a bracket or T-support, attach a condensate hose to the condensate drain.
• Protect the condensate hose against frost with sufficient thermal insulation.

⚠️ Material losses Ensure the condensate hose is not kinked.

▶️ After routing the condensate hose, check that the condensate can drain correctly.

11.10 External Second Heat Generator

For dual mode systems, always connect the heat pump into the return of the second heat generator (e.g. oil boiler).

11.11 High Limit Safety Cut-out for Space Heating System

⚠️ Material losses In order to prevent excessively high flow temperatures in the space heating system causing damage in the event of a fault, install a high limit safety cut-out on the circulator to limit the system temperature.

12. Electrical Connection

⚠️ WARNING Electrocution Before working on the appliance, isolate it from the power supply at the main circuit breaker.

ℹ️ Note: The leakage current of this appliance can be more than 3.5 mA.

The connection must only be made by a qualified contractor and in accordance with these instructions.

ℹ️ Note: Please observe the instructions for the WPM heat pump manager.

The connection terminals are located in the terminal area of the appliance.

Follow the instructions in the chapter "Preparation / Preparing the electrical installation".

• For all connections, use appropriate cables in accordance with National Electric Code (NEC).

12.1 Access to the Terminal Area

A diagram shows how to access the terminal area by removing a cover. It indicates '1 Strain relief' and '2 Terminal area'.

▶️ Route cables and leads through the strain relief fittings.

If space behind the appliance is limited, the terminal area can pivot outward for easier access.

▶️ Push the cover upwards.

▶️ Undo the screw on the terminal area.

▶️ Pivot the terminal area to the side.

12.2 WPL 15/25 A2W Premium

Connect the cables according to the following diagram.

A wiring diagram shows the terminal connections for the WPL 15/25 A2W Premium, detailing connections for BUS, Compressor, Control voltage, Power supply, and Electric emergency/booster heater (NHZ). It includes terminal assignments and connected loads for different kW ratings.

Terminal Assignments:

• X2: Safety extra low voltage (BUS)
• X3: Compressor (inverter)
• X4: Control voltage
• X5: Electric emergency/booster heater (NHZ)

Connected load:

Appliance Function

▶️ Ground the LV lead by inverting the braided shield over the cable sheath and clamping it under the ground terminal.

▶️ Then check that the strain relief fittings are working as intended.

12.3 Closing the Terminal Area

A diagram shows the terminal area cover being closed with a screw and serrated washer.

▶️ Secure the cover with the screw and serrated washer.

▶️ Connect the following components to the heat pump manager in accordance with the technical guides: Circulation pump for the heat consumer side, Outside temperature sensor, Return sensor (only for operation with buffer tank).

12.4 Ribbon Heater

A ribbon heater (see chapter "Installation / Appliance description / Accessories / Further accessories") can be fitted to the condensate pan and the condensate hose.

• Install a ribbon heater when mounting on the wall bracket or T-support.
• When installing on a concrete slab or the mounting bracket, we recommend installing a ribbon heater if the routing of the condensate hose means it is at risk of frost or is fully exposed to the elements.

Access to the ribbon heater terminal area: A diagram shows the unit with the cover removed, exposing the terminal area. '1 Electrical connection for ribbon heater' is indicated.

▶️ Guide the ribbon heater through the appliance.

A diagram (B) shows the ribbon heater being guided into the condensate drain pipe.

▶️ Make the electrical connection for the ribbon heater.

Electrical connection for ribbon heater: Power supply: L1, L2, GND.

13. Commissioning

Closing the terminal area: A diagram shows the terminal area cover being closed.

▶️ Position the cover on the appliance. ▶️ Secure the cover with the four screws.

13.1 Checks Before Commissioning

Before commissioning, check the following:

13.1.1 Heating System

• Have you filled the heating system to the correct pressure and opened the quick-action air vent valve?
• Is the flow rate on the heating side more than the minimum required flow rate?

13.1.2 Temperature Sensors

• Have you correctly positioned and connected the outside temperature sensor and the return temperature sensor (in connection with a buffer tank)?

13.1.3 High Limit Safety Cut-out

At ambient temperatures below +5°F (-15°C) it is possible that the high limit safety cut-out of the electric emergency/booster heater may trip.

• Check whether the high limit safety cut-out has tripped.

A diagram shows the electric emergency/booster heater with a reset button. '1 Electric emergency/booster heater' is indicated.

▶️ Remove the cause of the fault.

▶️ Reset the high limit safety cut-out by pressing the reset button.

13.1.4 Power Supply

• Have you correctly connected the power supply?

13.2 Using the Appliance with an External Second Heat Generator

The appliance is factory set for compressor operation with an electric emergency/booster heater. If the appliance is operated in dual mode with an external second heat generator, set the DIP switch to compressor mode with an external second heat generator (see chapter "Troubleshooting / Checking the IWS DIP switch settings").

13.3 Initial Start-up

13.3.1 Heating Curve Adjustment

The efficiency of a heat pump decreases as the flow temperature rises. The heating curve should therefore be adjusted with care. Heating curves that are set too high cause the zone valves or thermostatic valves to close, which may lead to the minimum flow rate required for the heating circuit not being achieved.

• Observe the instructions for the WPM.

The following steps will help you to adjust the heating curve correctly:

• Fully open thermostatic or zone valves in the primary room (e.g. living room and bathroom). We do not recommend installing thermostatic or zone valves in the primary room. Control the temperature for these rooms via a remote control.
• At different outside temperatures, e.g. 14°F and 50°F (-10°C and +10°C), adjust the heating curve so that the required temperature is set in the primary room.

Standard values to begin with:

If the room temperature is too low in spring and autumn (approx. 50°F (10°C) outside temperature), go to heat pump manager menu SETTINGS / HEATING / HEATING CIRCUIT and raise the parameter "COMFORT TEMPERATURE".

ℹ️ Note: If no FET remote control is installed, raising the "COMFORT TEMPERATURE" parameter will lead to a parallel offset of the heating curve.

If the room temperature is too low at low outside temperatures, increase parameter "HEATING CURVE".

If the "HEATING CURVE" parameter has been raised and outside temperatures remain relatively high, adjust the zone valve or thermostatic valve in the primary room to the required temperature.

⚠️ Material losses Never reduce the temperature in the entire building by closing all zone or thermostatic valves; instead use the setback programs.

When everything has been implemented correctly, the system can be heated to its maximum operating temperature and vented once again.

⚠️ Material losses For underfloor heating systems, observe the maximum permissible system temperature for that particular underfloor heating.

13.3.2 Other Settings

• For operation with or without a buffer tank, observe the information in the instructions for the WPM and parameter BUFFER OPERATION in menu SETTINGS / STANDARD SETTING.

Using the heat-up program

If you use the heat-up program, make the following settings on the WPM:

• Initially set the "DUAL MODE TEMP HZG" parameter to 86°F (30°C).
• Then set the "LOWER APP LIMIT HZG" parameter to 86°F (30°C).

ℹ️ Note: After completing the heat-up process, reset the "DUAL MODE TEMP HZG" and "LOWER APP LIMIT HZG" parameters to their respective standard values or to the respective system values.

13.4 Appliance Handover

Explain the appliance function to users and familiarize them with its operation.

ℹ️ Note: Hand over these operating and installation instructions to users for safekeeping. All information in these instructions must be closely observed. The instructions provide information on safety, operation, installation and maintenance of the appliance.

14. Settings

14.1 Silent Mode

SILENT MODE is an operating mode for air source heat pumps with reduced sound level.

• See the data table (see chapter "Specification / Data table") for the sound power level when silent mode is deactivated.

You can reduce the fan speed and compressor output for a certain time in the "COMMISSIONING / SILENT MODE / OUTPUT REDUCTION" menu.

ℹ️ Note: If you activate SILENT MODE, the maximum output is reduced to 70% as standard. This value can be increased further or reduced to the specified minimum value as required.

ℹ️ Note: When silent mode is active, operating costs will be higher. In silent mode 2, heating and DHW heating are provided solely via the emergency/booster heater.

15. Appliance Shutdown

A table shows maximum appliance sound levels according to "COMMISSIONING / SILENT MODE / OUTPUT REDUCTION / OUTPUT" settings.

In the "PROGRAMS / SILENT PROGRAM 1" menu, set the times when the heat pump should switch to a quieter operating mode.

⚠️ Material losses Never interrupt the heat pump power supply, even outside of the heating season. Otherwise, system frost protection is not guaranteed.

The heat pump manager automatically switches the heat pump to summer or winter mode.

It is necessary to allow the power supply to be disconnected after installation. An appropriate external switch that disconnects the WPL from the power grid should be installed, located in close proximity to the WPL unit.

15.1 Standby Mode

To shut the system down, simply set the heat pump manager to "Standby mode". This way, the safety functions that protect the system remain enabled, e.g. frost protection.

15.2 Power Interruption

If the system is to be isolated from the power supply permanently, please observe the following:

⚠️ Material losses If the heat pump is completely switched off and there is a risk of frost, drain the system on the water side.

16. Maintenance

⚠️ WARNING Electrocution Prior to commencing any service or cleaning work, isolate the appliance across all poles from the power supply. Following disconnection from the power supply, parts of the appliance may remain energized for 2 minutes until the inverter capacitors have discharged. Make sure that nobody can activate the power supply during service.

We recommend a regular inspection (to establish the current condition of the system), and maintenance if required (to return the system to its original condition).

A diagram shows an inspection port labeled '1'.

⚠️ Material losses Keep the air discharge and intake apertures free from snow and ice. Remove any leaves or other foreign bodies from the evaporator fins periodically.

17. Troubleshooting

⚠️ WARNING Electrocution Before working on the appliance, isolate it from the power supply at the control panel. Following disconnection from the power supply, parts of the appliance may remain energized for 2 minutes until the inverter capacitors have discharged. Make sure that nobody can activate the power supply during service.

ℹ️ Note: Please observe the instructions for the heat pump manager.

If the fault cannot be located during a service using the heat pump manager, open the control panel in emergencies and check the IWS settings.

17.1 Checking the IWS DIP Switch Settings

Carry out the following steps to make the IWS accessible.

Diagrams show how to remove the cover and bracket to access the IWS (Integral Heat Pump Control Unit).

IWS Components:

• 1 IWS
• Lift the control panel.
• Turn the control panel around.

Diagrams show the IWS board with labeled components: 1 LEDs, 2 DIP switch (WP-Typ), 3 Reset button, 4 DIP switch (BA).

DIP switch (WP-Typ): The DIP switch (WP-Typ) on the IWS serves to set the relevant heat pump type.

Factory setting: Compressor mode with electric emergency/booster heater

Diagram shows WP-Typ DIP switch set to "ON" for positions 1, 2, 3, 4.

▶️ Check whether the DIP switch is set correctly.

Compressor mode with an external second heat generator

⚠️ Material losses In this case, do not connect the electric emergency/booster heater.

If the appliance is operated in dual mode operation with an external second heat generator or in a group with additional heat pumps, set the DIP switch as shown.

Diagram shows WP-Typ DIP switch set to "ON" for positions 1, 2, 3, 4.

DIP switch (BA):

▶️ Check whether the DIP switch (BA) is set correctly.

Diagrams show BA DIP switch settings for "Heating mode only" and "Heating and cooling mode".

17.1.1 Closing the Terminal Area

▶️ Position the cover on the appliance. ▶️ Secure the cover with the four screws.

17.2 Light Emitting Diodes (LEDs)

Diagrams show the IWS board with LEDs and reset button labeled.

The following table shows the meaning of the LEDs on the IWS.

Faults indicated by the red LED:

• High pressure fault
• Low pressure fault
• Central fault
• Hardware fault on the IWS (see fault list or message list for the WPM heat pump manager)

17.3 Reset Button

If the IWS was not initialized successfully, you can reset the settings with this button.

For this, also observe chapter "Reinitializing the IWS" in the heat pump manager instructions.

17.4 Resetting the High Limit Safety Cut-out

The electric emergency/booster heater stops if the heating water temperature exceeds 185°F (85°C), for example if the flow rate is too low.

A diagram shows the electric emergency/booster heater and the reset button.

▶️ Reset the high limit safety cut-out by pressing the reset button.

▶️ Check whether the heating water is being circulated at a sufficiently high flow rate.

17.5 Fan Noise

The heat pump draws heat from the outdoor air. This causes the outdoor air to cool down. At outside temperatures of 32-46°F (0-8°C), the air may be cooled to below freezing point. If, under these conditions, precipitation occurs in the form of rain or fog, ice may form on the air grill, the fan blades or the air routing pipes. If the fan comes into contact with this ice, this creates noise.

How to remedy rhythmic scratching or grinding noises:

• Check whether the condensate drain is clear of obstructions.
• Check whether the design output and temperature are set correctly. Ice formation is particularly pronounced when a high heating output is demanded at moderate outside temperatures.
• Carry out a manual defrost, as many times as necessary, until the fan runs freely again. Observe the information in the WPM instructions and parameter "START DEFROST" in menu "COMMISSIONING / COMPRESSOR".

▶️ At outside temperatures above 34°F (+1°C), shut down the appliance or switch it over to emergency mode for approx. 1 hour. After this, the ice should have melted.

▶️ Check that the appliance is installed in line with the installation requirements.

▶️ If noise occurs frequently, activate defrost manually. Observe the information in the WPM instructions and parameter "POWERDEFROST" in menu "COMMISSIONING / COMPRESSOR".

▶️ If noise persists, notify the customer service department.

18. Specification

18.1 Dimensions and Connections

18.1.1 WPL 15 A2W Premium

Diagrams show the dimensions of the WPL 15 A2W Premium unit from different views (top, front, side), with measurements in inches and millimeters. Labels indicate: e01 Heating flow, e02 Heating return, d45 Condensate drain, d47 Drain, g01 Air intake, g02 Air discharge. Connection types and diameters are listed.

18.1.2 WPL 25 A2W Premium

Diagrams show the dimensions of the WPL 25 A2W Premium unit, similar to the WPL 15, with measurements in inches and millimeters. Labels and connection details are provided.

18.2 Wiring Diagram

A detailed wiring diagram for WPL 15 A2W Premium / WPL 25 A2W Premium (single phase) is provided, showing electrical components, connections, and labels for various parts like the integral heat pump control unit (IWS), compressor motor, sensors, relays, and terminals.

A legend lists components such as A2 (IWS), M1 (Compressor motor), X29 (IWS plug 12-pin - control unit), X38 (IWS plug 3-pin - oil sump), etc.

18.3 Application Limit

18.3.1 Heating Field of Operation

A graph shows the heating field of operation, plotting Leaving water temperature (°F) against Ambient air temperature (°F).

18.3.2 Cooling Field of Operation

A graph shows the cooling field of operation, plotting Leaving water temperature (°F) against Ambient air temperature (°F).

18.4 Output Diagrams, WPL 15 A2W Premium

18.4.1 Heating Capacity

A graph shows Heating capacity (kBTU/h) versus Ambient temperature (°F) for different Leaving Water Temperatures (LWT) and a minimum load line.

18.4.2 COP at Full Heating Load

A graph shows COP versus Ambient temperature (°F) for different LWTs.

18.4.3 COP at Minimum Heating Load

A graph shows COP versus Ambient temperature (°F) for different LWTs.

18.4.4 Cooling Capacity at 47°F Leaving Water Temperature

A graph shows Cooling capacity (Ton) versus Ambient air temperature (°F) for maximum and minimum capacity.

18.5 Output Diagrams, WPL 25 A2W Premium

18.5.1 Heating Capacity

A graph shows Heating capacity (kBTU/h) versus Ambient temperature (°F) for different LWTs and a minimum load line.

18.5.2 COP at Full Heating Load

A graph shows COP versus Ambient temperature (°F) for different LWTs.

18.5.3 COP at Minimum Heating Load

A graph shows COP versus Ambient temperature (°F) for different LWTs.

18.5.4 Cooling Capacity at 47°F Leaving Water Temperature

A graph shows Cooling capacity (Ton) versus Ambient air temperature (°F) for maximum and minimum capacity.

18.6 Data Table

The performance data apply for new appliances with no fouling (dirt) on the heat exchanger. The power consumption data are maximum values and may vary due to the operation condition, auxiliary consumption for components like circulation pump are included. The performance data are based on 100% water for heat transfer. The usage of polypropylene glycol with a minimum concentration of 30% is strongly recommended. Depending on the glycol concentration the performance values may vary.

* According to AHRI Standard 550/590 Energy Star performance test [A45: Ambient air temperature = 45°F (7.2°C)] [LWT35: Leaving water temperature = 35°F (1.7°C)]

19. Warranty

LIMITED WARRANTY

Subject to the terms and conditions set forth in this limited warranty, Stiebel Eltron, Inc. (the "Manufacturer") hereby warrants to the original purchaser (the "Owner") that each WPL A2W Premium (the "Product") shall not fail due to defects in the Manufacturer's materials or workmanship in ("Residential applications") defined as single family dwellings or duplexes; for personal use by occupants of a domicile for a period of:

• (7) years compressor
• (2) years - All other parts

As Owner's sole and exclusive remedy for breach of the above warranty, Manufacturer shall, at the Manufacturer's discretion, send replacement parts for local repair, or replace the defective Product with a replacement unit with comparable operating features. Manufacturer's maximum liability under all circumstances shall be limited to the Owner's purchase price for the Product. All replacement compressors or parts shall be warranted for the remainder of the original warranty period.

This limited warranty shall be the exclusive warranty made by the Manufacturer and is made in lieu of all other warranties, express or implied, whether written or oral, including, but not limited to warranties of merchantability and fitness for a particular purpose. Manufacturer shall not be liable for incidental, consequential or contingent damages or expenses arising directly or indirectly from any defect in the Product or the use of the Product. Manufacturer alone is authorized to make all warranties on Manufacturer's behalf and no statement, warranty or guarantee made by any other party shall be binding on Manufacturer.

Warranty coverage exclusions:

1. All labor costs for diagnostics, repair, replacement of a failed compressor, replacement of parts, and removal of the product for any reason;
2. The product must be installed by a licensed HVAC Contractor;
3. Installation of the Product other than as directed by Manufacturer and other than in accordance with all applicable local and state building codes;
4. Failure to maintain the Product or to operate the Product in accordance with the Manufacturer's specifications;
5. Improper installation of the Product and/or improper materials used by any installer and not relating to defects in parts or workmanship of Manufacturer;
6. Moving the Product from its original place of installation;
7. Damage to the Product by acts of God and circumstances over which Manufacturer has no control including vandalism
8. Connecting the Product to any incompatible third party component or system;
9. Installing the Product in an environment where it will be exposed to corrosive and caustic substances;
10. Installing the Product less than 1/3 of a mile from any waterbody containing salt, such as seawater;
11. The Product must be charged with glycol to prevent frost damage during a power outage;
12. Any damage to the Product caused by wildlife or insects such as physical destruction, nesting, or infestations;
13. Mounting the Product not in accordance with the manual;

Should owner wish to return the Product to manufacturer for replacement under this warranty, Owner must first secure written authorization from Manufacturer. Owner shall demonstrate proof of purchase, including a purchase date, and shall be responsible for all removal and transportation costs. If Owner cannot demonstrate a purchase date this warranty shall be limited to the period beginning from the date of manufacture stamped on the Product. Manufacturer reserves the right to deny warranty coverage upon Manufacturer's examination of Product. This warranty is restricted to the Owner and cannot be assigned. Any defective compressor or part replaced under this warranty shall become the property of Manufacturer and returned for inspection.

Some States and Provinces do not allow the exclusion or limitation of certain warranties. In such cases, the limitations set forth herein may not apply to the Owner. In such cases this warranty shall be limited to the shortest period and lowest damage amounts allowed by law. This warranty gives you specific legal rights and you may also have other rights which vary from State to State or Province to Province.

This Warranty is valid for U.S.A. & Canada only. Warranties may vary by country. Please consult your local Stiebel Eltron Representative for the Warranty for your country.

Contact Information

United States of America
STIEBEL ELTRON, Inc.
17 West Street | West Hatfield, MA 01088
Tel. 413.247.3380 | Fax 413.247.3369
Toll-free 800.582.8423
info@stiebel-eltron-usa.com
www.stiebel-eltron-usa.com

Austria
STIEBEL ELTRON Ges.m.b.H.
Eferdinger Str. 73 | 4600 Wels
Tel. 07242 47367-0 | Fax 07242 47367-42
info@stiebel-eltron.at
www.stiebel-eltron.at

Belgium
STIEBEL ELTRON bvba/sprl
't Hofveld 6 - D1 | 1702 Groot-Bijgaarden
Tel. 02 42322-22 | Fax 02 42322-12
info@stiebel-eltron.be
www.stiebel-eltron.be

Czech Republic
STIEBEL ELTRON spol. s r.o.
K Hájům 946 | 155 00 Praha 5 - Stodůlky
Tel. 251116-111 | Fax 235512-122
info@stiebel-eltron.cz
www.stiebel-eltron.cz

Denmark
Pettinaroli A/S
Mandal Allé 21 | 5500 Middelfart
Tel. 06341 666-6 | Fax 06341 666-0
info@pettinaroli.dk
www.stiebel-eltron.dk

Finland
Insinööritoimisto Olli Andersson Oy
Kapinakuja 1 | 04600 Mäntsälä
Tel. 020 720-9988 | Fax 020 720-9989
info@stiebel-eltron.fi
www.stiebel-eltron.fi

France
STIEBEL ELTRON SAS
7-9, rue des Selliers
Β.Ρ 8510757073 Metz-Cédex 3 Tel. 0387
7438-88 | Fax 0387 7468-26
info@stiebel-eltron.fr
www.stiebel-eltron.fr

Germany
STIEBEL ELTRON GmbH & Co. KG
Dr.-Stiebel-Straße | 37603 Holzminden
Tel. 05531 702-0 | Fax 05531 702-480
info@stiebel-eltron.de
www.stiebel-eltron.de

Hungary
STIEBEL ELTRON Kft.
Pacsirtamező u. 41 | 1036 Budapest Tel.
01 250-6055 | Fax 01 368-8097
info@stiebel-eltron.hu
www.stiebel-eltron.hu

Japan
NIHON STIEBEL Co. Ltd.
Ebara building 3F
2-9-3 Hamamatsu-cho
Minato-Ku | 105-0013 Tokyo
Tel. 03 34364662 | Fax 03 34594365
info@nihonstiebel.co.jp
www.nihonstiebel.co.jp

Netherlands
STIEBEL ELTRON Nederland B.V.
Daviottenweg 36
5222 BH 's-Hertogenbosch
Tel. 073 623-0000 | Fax 073 623-1141
stiebel@stiebel-eltron.nl
www.stiebel-eltron.nl

Poland
STIEBEL ELTRON Polska Sp. z o.o. ul.
Instalatorów 9 | 02-237 Warszawa Tel. 022
60920-30 | Fax 022 60920-29
stiebel@stiebel-eltron.com.pl
www.stiebel-eltron.com.pl

Russia
STIEBEL ELTRON LLC RUSSIA
Urzhumskaya street 4,
building 2 | 129343 Moscow
Tel. 0495 7753889 | Fax 0495 7753887
info@stiebel-eltron.ru
www.stiebel-eltron.ru

Slovakia
STIEBEL ELTRON Slovakia, s.r.o.
Hlavná 1 | 058 01 Poprad
Tel. 052 7127-125 | Fax 052 7127-148
info@stiebel-eltron.sk
www.stiebel-eltron.sk

Sweden
STENERGY
Vasagatan 14 | 545 30 Töreboda
Sales:
Tel. 0506 105-10 | info@stiebel-eltron.se
Technique & Service:
Tel. 0150 54200 | info@heatech.se
www.stiebel-eltron.se

Switzerland
STIEBEL ELTRON AG
Netzibodenstr. 23 c | 4133 Pratteln
Tel. 061 81693-33 | Fax 061 81693-44
info@stiebel-eltron.ch
www.stiebel-eltron.ch

Thailand
STIEBEL ELTRON Asia Ltd.
469 Moo 2 Tambol Klong-Jik
Amphur Bangpa-In | 13160 Ayutthaya
Tel. 035 220088 | Fax 035 221188
info@stiebeleltronasia.com
www.stiebeleltronasia.com

United Kingdom and Ireland
STIEBEL ELTRON UK Ltd.
Unit 12 Stadium Court
Stadium Road | CH62 3RP Bromborough
Tel. 0151 346-2300 | Fax 0151 334-2913
info@stiebel-eltron.co.uk
www.stiebel-eltron.co.uk

STIEBEL ELTRON