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OPTIMA TWINCOIL – OTC

Tank-in-tank unit with DHW and buffer tank
integrated for multiple energy sources

OPTIMA TWINCOIL – OTC – features high efficiency and fast recovery times, and covers the hot water demand for at least 6 people as well as heating requirements in homes up to 400m2 in a single unit. OPTIMA TWINCOIL is suitable for heat pumps up to 15 kW, by way of the stainless steel tube heat exchanger with a large surface area of 2.6m2 in the DHW tank.The stainless buffer tank of 85 L can be connected to ≤ 12m2 solar collectors using a second tube heat exchanger (0.7m2). The 9 kW
electric heater in the buffer tank provides full energy flexibility as well as back-up. OPTIMA TWINCOIL also features an electric heating element in the DHW tank for legionella protection (controlled externally). The heater can also be used as DHW backup for the heat pump.

OPTIMA is the market’s most advanced and energy efficient tank-in-tank products, with class-leading PUR insulation and patented solutions to increase hot water production from heat pumps. The OPTIMA series integrates both a stainless steel buffer tank and heat exchangers in one unit, and takes up minimal space.

WHY CHOOSE OPTIMATWINCOIL?

  • Save approx. 650 kWh / year vs. glass wool insulated products
  • Integrated heat exchangers for HP ≤ 15 kW / solar ≤ 12m²
  • Integrated stainless buffer tank of 85 L
Water Heater Optima Twincoil OTC 300 OSDO Hotwater
Water heater Optima Twincoil OTC 300 OSO Hotwater
Water Heater Optima Twincoil OTC 300 OSDO Hotwater
Water heater Optima Twincoil OTC 300 OSO Hotwater

ADVANTAGES

  • NANOPUR - Class-leading insulation
  • ULTRAWELD - Superior corrosion resistance
  • INCOTEC - High durability in hard water
  • DUO STAINLESS - Tank-in-tank all stainless
  • HEATING+DHW - Two funtions, one footprint
  • ECO–HOTWATER - DHW from alternative energy

IMPORTANT EQUIPMENT

  • Thermostat DHW/Buffer: Adjustable 50-75°C + 30-60°C
  • Security VV/Buffer: 9 bar/90°C, G ½”M + 3 bar, G ½”M
  • Heating elements: G 1.¼"M / limescale resistant
  • Sensor pockets: 2 pcs. for 6 - 8 mm. sensor
  • Appliance feet – Adjustable 0 - 40 mm.
Weight 360 kg
Dimensions 5 cm
Optima Twincoil OTC300 snitt web 01 e1705951213156
SpecificationsUNITOTC 300 – 3+9kW/1/3x230V+HX 2.6+0.7m²
Identification
Product no.OSO1 1 009 418
Product nameOTC 300 - 3+9kW/1/3x230V+HX 2.6+0.7m²
UsageN/A
PlacementFloor
Dimensions
Diameter — ⌀mm595
Height - Hmm1760
Weightkg71
PackagingmmN/A
Freight volumedm30.64
Technical/ErP information
CapacitypersonsN/A
Capacity 40°CL335
VolumeL200/85
Heat-up time ΔT 65°ChoursN/A
Thermostat set point°C75
Heat loss-EN 12897watt49
AEC (energy consumption)kW/yearN/A
Energy efficiency%N/A
Tapping profile3XS–XXLN/A
Energy ratingA+–FB

Advantages

MORE HOT WATER
Substantially higher temperature (70°C+), highly efficient mixing valve (no scolding), minimal heat loss and optimal design features gives up to 20 % more hot water and class leading capacity.

PRO INSULATION
The use of NANOPUR™ with insulation values far surpassing Pentane, often in combination with VACUUM panels, ensures minimum heat loss and class leading energy efficiency.

STRONGER
EVERLAST™ titanium alloyed stainless steel in combination with OSO’s unique ULTRAWELD™ system and state-of-the-art passivation process equals class leading corrosion resistance.

LIGHTER
EVERLAST™ titanium alloyed, high tensile strength, stainless steel equals lower weight and efficient use of resources. OSO products are more than 40 % lighter than enameled products.

BUILT TO LAST
INCOTEC™ el. immersion heaters with ultra high-grade Incoloy 825 stainless, DZR brass, zinc-free soldering and carefully calculated surface loads results in maximum durability in hard water.

Documents

Download manual here

Download OPTIMA TWINCOIL – OTC manual
Assembly and spare parts
OSO Hotwater logo white

Ethical guidelines

Over 85 years OSO Hotwater has earned the trust from suppliers, co-workers and customers. We are still going to earn, and manage, this trust in an exceptionally good way, and value the opinion of our partners.

Our guiding targets:

  1. Safe products, manufactured by safe processes
  2. Class leading quality and efficiency
  3. Correct products delivered on-time
  4. Cost- and energy efficient processes
Code of conduct

OSO Hotwater AS

Organization number 936 603 947

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