OPTIMA COIL

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OSO OPTIMA COIL
OC

The ultimate tank-in-tank unit for heat pumps up to 15kW

OPTIMA series are tank-in-tank units with unique and patented solutions to increase Seasonal Performance Factor (SPF) for heat pumps vs. traditional tank-in-tank units. The buffer tank and domestic hot water tank (both made in stainless steel) are integrated in a single unit, increasing efficiency, reducing footprint as well as installation time. The smooth piped, scale-resistant heating coil is another advantage. OPTIMA boasts class-leading insulation capabilities, while maintaining a higher temperature than others (75 °C) in the DHW tank for unbeatable performance and more hot water in a smaller unit. 

OPTIMA COIL — OC 300 / 360 is ideal for heat pumps without three way valve for DHW priority up to 12 / 15 kW, and for heating demands in households up to 300 / 400 m². The smooth piped, scale-resistant heating coil in the buffer tank increases available surface area for heat transfer dramatically vs. traditional tank-in-tank units, and increases SPF. OPTIMA COIL has full electric back-up for the heating system for ultimate peace of mind, as well as ultra-grade INCOTEC immersion heater as booster for the domestic hot water unit. Adjustable hot water draw-off temperature (prevents scalding) to the taps is ensured by the factory fitted UX mixing valve with maximum water flow rate of 0,7 L/s.

WHY CHOOSE OPTIMA COIL?
• Reduce heat loss by 300 kWh* / year with NANOPUR*
• Custom-designed for heat pumps without DHW priority up to 15 kW
• Higher heat transfer for DHW and increased heat pump performance
• DHW and buffer tank with full electric back-up in one footprint
•  5 year warranty on the stainless steel pressure tank
* Compared to 300 L cylinder with EPS insulation

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
Components
Mixing valve—Adjustable 45–80 °C — Preset 55 °C — ⌀ 15 mm *
Thermostat DHW — Adjustable 60–90 °C — Preset 75 °C
Thermostat buffer —Adjustable 30–60 °C — Preset 45 °C
Safety valve —9 bar + 3 bar — ¾" to drain
Appliance feet — Adjustable — Included
Buffer connection —4 × 1" female BSP threads
Coil connection—2 × ¾" female BSP threads
SpecificationsUnitOC 300 - 3 + 9 kW / 1 / 3 × 230 V LT + HX 0,8 m²OC 360 - 3 + 15 kW / 1 / 3 + 230 V LT + HX 0,8 m²
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Identification
Product no.NRF80002668000267
Product seriesOPTIMA COILOPTIMA COIL
Product nameOC 300 - 3 + 9 kW / 1 / 3 × 230 V LT + HX 0,8 m²OC 360 - 3 + 15 kW / 1 / 3 + 230 V LT + HX 0,8 m²
UsageN/A N/A
PlacementGulvGulv
Dimensions
Diameter — ⌀mm580580
Height — Hmm17601990
Weightkg7085
Packagingmm595 × 595 × 1765595 × 595 × 2000
Freight volumedm3651744
Technical / ErP information
Capacity Persons5.07.0
Capacity    40°CLN/A N/A
VolumeL163206
Heat-up time 
 ΔT 65°C
HoursN/AN/A
Thermostat set point°C7575
Heat loss 
 EN 12897
Watt5259
AEC (energy consumption)kW /yearN/A N/A
Energy efficiency%N/A N/A
Tapping profile3XS–XXLN/A N/A
Energy ratingA–GB/BB/C
Price
Suggested retail price ex. VATEUR17502000
Suggested retail price inc. VATEURN/A N/A
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.