High Efficiency Hot Water Heat Pump

The WWK Hot Water Heat Pump is proving to be one of the most efficient water pumps on the market providing high energy cost savings and environmentally friendly hot water all year round. This hot water heat pump technology has been tried and tested in Germany for over forty years to ensure consumers receive real energy, environmental, and money savings.

The WWK heat pumps are the lowest current drawing heat pumps on the market at only 2.3 Amps. It's highly energy efficient operation saves up to 74% on hot water energy use compared to a traditional electric hot water tank. The heat pump is Solar PV compatible can be operated on extended off-peak power and timers. The well insulated tank minimises heat losses to the outside air and therefore requires less re-heating of the water (costing you less $$$).

The WWK heat pumps have an additional special function: they can receive a signal from your solar PV system via an external signal. When this signal is sent from the solar PV inverter to the heat pump, the unit will increase the use of solar energy by raising the tank temperature - thereby banking energy now for use later.

To protect against corrosion, the heat pump cylinder is coated internally with special enamel and is equipped with a non-sacrificial current impressed anode. This means that the heat pumps are designed to work in hard and soft water areas, and therefore have a long lifespan.

Significant Government Rebates Available - up to $1200 depending on where you live and the market price for STCs - check how much you can get back here:

www.stiebel-eltron.com.au/rebates

Stiebel Eltron has been providing energy-efficient air source hot water pumps for both the commercial and residential markets Australia wide since 1996, and has rapidly been transformed into a household name synonymous with high-quality, well-engineered and energy-efficient products. As early as 1976 Stiebel Eltron began developing heat pump technology for energy efficient hot water.

Features

• German engineered and European made (guaranteeing you an efficient and reliable product)
• Designed for Australian conditions (operates automatically between -5°C and 42°C)
• Super quiet operation with additionally encased compressor design (stopping generated noise from escaping)
• Suitable for hard or soft water areas, and includes maintenance free anode (current impressed anode saves you $$$ in the long run because no maintenance required)
• Unique 'roll bond condenser' technology for optimal heat transfer (transfers the generated heat more effectively to the water in the tank)
• Active defrost function maintains operation in cold climates automatically (meaning you never have to worry about going outside in the cold)
• Single piece design (makes installation quick and easy)
• Ideal to operate with solar PV system (for additional $$$ savings)

Description

• Maximum of 360 litres of 40°C water supplied in first hour of draw down (never run out of shower hot water)
• Suitable for a 3 - 4 person home (suitable for a medium size household)
• Maximum 65 degree Celsius hot water supply temperature (hot enough for all household requirements)
• Very High Efficiency: Coefficient of Production (seasonal average) of 3.94 (for every 1.0kW of power input, you get back on average 3.94kW of heat)
• 'H' model includes a 'Smart Element' (automatically works as a backup booster should you ever need it)
• Can be connected to a smart inverter to take advantage of solar PV power production (stores additional heat in the tank, turning it into a thermal battery)
• Domestic Use Warranty: 5 years on cylinder and condenser, 2 years for refrigeration and electrical (not recommended for commercial use)

Kit Contents

Included in Kit:

• Heat pump unit (plug-and-play) with heavy duty power lead

Required on-site according to installation type:

• Cold Water Feed Isolation Valve
• Expansion Control Valve
• Tempering/Thermostatic Mixing Valve

Learn More: Hot Water Heat Pump Knowledge

Calculator by Stiebel Eltron -> WWK selection and comparative savings

Short Article by Stiebel Eltron -> Connecting your WWK to Solar PV

Video by Stiebel Eltron -> How does a heat pump work?:

FAQ

1. What else do I need to complete the installation? Generally all that's required is a power point and somewhere to drain a bit of condensation from in the unit... apart from this, nothing, we send out a complete kit that can be installed immediately. Please note that to comply with regulations some installation types may require additional valves (see above in Kit Contents).
2. What is the warranty on the hot water heat pump? Stiebel Eltron provides a 5-year warranty on the tank and condenser, and 2 years on the refrigeration and electrical components. Please note the warranty is valid for domestic installations only.
3. How do I know where to install the heat pump? Heat pumps need to breath! Because they harvest heat from the air, they need access to lots of it. Generally we would recommend installing the heat pump outside, with the discharge vent of the heat pump not facing into the prevailing wind, and additionally not bouncing off a fence or wall and making its way into the air intake vent (this lowers the unit efficiency dramatically). We recommend internal installations only where there is a really large amount of air volume in the space. Stiebel Eltron recommends a minimum room size of 13 cubic metres, however, please not the temperature within an installation room of this size will drop by ~4°C when the heat pump is extracting heat from the air (so the larger the room, the better).
4. What's the difference between the standard WWK 222/302 heat pump and the H-models? The WWK 222/302 H hot water heat pumps have a smart element situated in the top of the hot water cylinder. This smart element will switch on along with the heat pump function when a high volume of hot water is drawn off from the hot water tank. This smart element will assist the heat pump to heat approximately the top 80 litres. This smart element function is designed to aid hot water recovery for high use of hot water.
5. Can the WWK be used for floor and radiator hydronic heating? The WWK range of heat pumps are not designed for room heating applications. The main reason is that the heat pump will eventually fail with warm return water continually entering the cold water inlet - the WWK heat pumps are designed to work with cold water only (10-20°C).
6. What happens after I order the unit and pay? We will be in contact with you to confirm the order, delivery address and timeframe, and any other questions you may have.
7. How long until I receive my order, and is there a delivery fee? Within Australian state/territory capital cities delivery is free (excluding Darwin), and your order will usually arrive within 3 business days. For orders outside of capital cities, we offer a flat-rate fee of $200 for delivery.

Additional Products

• Highly Effective Water Filtration Systems by Stiebel Eltron available at Stiebel Store
• Complete Installation of this Hot Water Heat Pump (Perth only) from $500.00+GST by Euroheat Australia

Technical Data

Downloads

WWK Data Sheet PDF 2.15 MB

WWK 222 & 302 Operation and Installation Guide PDF 6.77 MB

WWK Operation & Installation Guide - 2020 Digital LCD Controller Model PDF 9.33 MB

WWK 222(H) / WWK 302(H) Warranty PDF 110.68 kB

STIEBEL ELTRON Brochure WWK PDF 3.70 MB

STIEBEL ELTRON Tech Line Drawing WWK 222 PNG 603.19 kB

STIEBEL ELTRON Tech Line Drawing WWK302 PNG 635.13 kB