LARGE Instantaneous Hot Water Heater 3-Phase DEL 27 Plus

Compared to electric hot water storage systems, instantaneous hot water heaters can be up to 30% more efficient. How is this if they both use electricity as the heat source? Well its simple - electric hot water storage units hold a lot of hot water inside them and have a very large external surface area. Even though the outside of the tanks are insulated, heat is still lost through the insulation, the tank valves and connections into the external atmosphere (or inside in your cupboard). Instantaneous water heaters don't have this problem - they heat water instantly only when you need it.

The DEL 27 Plus is suitable for supplying hot water to a single or multiple draw-off points, e.g. supply to bathroom and a kitchen.

And because it's an instantaneous water heater you'll have endless hot water - it never runs out.

No other instantaneous water heater with 3i technology has such a wide range of features as the DEL Plus.

With backlit multifunction display, temperature memory, childproofing, and ECO mode, it offers best-in-class comfort and convenience.

The energy and water saving ECO mode can be used to limit the maximum flow rate of the DEL Plus to enable a constant DHW temperature, even where inlet temperatures are low.

Features

• Made in Germany (guaranteeing you an efficient and reliable product)
• Maximum hot water output temperature 50° Celsius, no tempering valve needed (saving space and $$$)
• Electronically controlled continuous flow hot water delivery with 3i Technology (accurate and constant temperature delivery)
• Temperature memory function keys (switch between two pre-set temperatures)
• Quiet operation (won't disturb anyone)
• Suitable for hard or soft water areas due to the Rapid Bare Wire Heating System (long lifespan and no maintenance required)
• Electronic safety protection, with air bubble detection (your safety is guaranteed)
• Single piece design (makes installation quick and easy)
• Suitable for preheated water (e.g. in solar thermal and heat pump systems)
• Warranty: 5 years for domestic use, 1 year for commercial use.

Description

The unit is a sealed (unvented) mains-pressure tested appliance for use with all commercially available pressure taps.

The DEL Plus water heater requires no safe tray, flue or ventilation.

Electronically controlled instantaneous water heater with 3i technology. Accurate temperature delivery up to the maximum output. Temperature selection from 30 - 50°C via rotary selector, temperature adjustment for showers in 0.5 °C increments.

Backlit multifunction display to show set temperature, current power consumption, status and service indication.

Memory function for 2 programmable temperatures of choice.

Pivoting appliance cover and programming unit for increased operating convenience in under-sink installations.

Saves energy and water by means of electronic output control with 3i technology.

What is 3i Technology? 3 sensors ensure that the selected temperature is accurately achieved. For this, only the actual required amount of energy is expended; there is no need to add cold water at the tap. This ensures maximum energy efficiency.

ECO mode can be individually selected for particularly economical operation.

Childproofing feature limiting output temperature to 43°C included as standard.

Piping can be connected from below the unit or discreetly from the wall behind.

Kit Contents

Included in Kit:

• Instantaneous DEL Plus water heater
• Installation kit (wall bracket, plugs, gaskets, tees, caps, strainer, washers, etc.)

Possibly required on-site according to installation type:

• Cold Water Feed Isolation Valve
• Pressure Limiting Valve

Learn More: Hot Water Heat Pump Knowledge

White Paper by Stiebel Eltron -> The Benefits of Decentralising Hot Water Systems in Multi-residential Buildings

Video by Stiebel Eltron -> Why use an instantaneous water heater?:

FAQ

1. What else do I need to complete the installation? Generally all that's required is a power supply and space for the installation... apart from this, nothing, we send out a 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 water heater? Stiebel Eltron provides a 5-year domestic warranty, and a 1-year commercial warranty on the DEL 13/18/27 Plus units.
3. Does the DEL Plus need a tempering valve to limit the hot water to 50 degrees Celsius? No, the DEL Plus hot water system delivers hot water not exceeding 50 degrees Celsius in accordance with AS3498, overcoming the need for a tempering valve in hygienic areas where the water must be limited to not exceed 50 degrees Celsius.
4. What's the difference between the different DEL water heater models? The only difference is in the water heating capacity, otherwise they all have the same functions.
5. Where can the DEL Plus instant hot water system be installed? The DEL Plus water heater can be installed almost anywhere due to its compact size. The water heater does not require ventilation, relief drain or safe trays so it can be installed in a cupboard, in the roof space, below the sink, in a service cavity, in a Euro laundry just to name a few options. If installing outdoors, the hot water system must be protected from the elements by a protective covering such as a meter box.
6. How far can the water heater be installed from the hot water outlet? The DEL Plus water heaters are designed to be installed as close as practical to the most used hot water outlet. Installing closer to the point of use can help to save water and energy by delivering hot water quickly to the outlet. The STIEBEL ELTRON 3 phase electric instantaneous water heaters are designed to service multiple outlets located several metres away from the system.
7. What size instantaneous electric water heater do I need for my apartment or house? As a general rule, the instant hot water system required will be based on the number of hot water outlets the hot water system needs to service, along with the incoming cold water temperature. As a general guide in an apartment/house with 1 bathroom, a 19.4kW three-phase electric instantaneous water heater (e.g. DEL 18 PLUS) is suitable. In a house with 2 bathrooms, a 28-29.1kW three-phase electric instantaneous water heater (e.g. DEL 27 PLUS) should be selected.
8. 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.
9. 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 Water Heater (Perth only) from $500.00+GST by Euroheat Australia

Technical Data

Downloads

STIEBEL ELTRON Data Sheet DEL Plus PDF 782.24 KB

DEL Plus Operation & Installation Guide PDF 9.28 MB

DEL Plus Dimensions PNG 59.45 kB

DEL Plus Exploded Diagram PNG 824.59 kB

DEL Plus Minimum Spacing PNG 101.86 kB