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OSO Accu Coil - 50RC/50RCE

  - Buffer tanks with DHW heating coil for heat pumps.

The Accu Coil series are buffer tanks suitable for space heating requirements, in addition to the possibility of pre-heating domestic hot water (DHW). The buffer provides heat pump or solar collectors with optimal working conditions, functioning as an energy storage and preventing excessive start-stops for the heat pump, reducing lifetime for the compressor. The Accu series provides consistent space heating temperature while the heat pump is producing domestic hot water (DHW).

The Accu Coil series are delivered with / without electric booster heater of 9-15kW, depending on whether the heat pump has this function integrated or not. Accu 50/100 liter units have double sets of 1” connections for flow and return from the energy source. The 300 liter units have 5/4” connections. There is also one 22 mm. connection in the top of the cylinder for aerating the system and a separate 15 mm. drain connection in the bottom of all Accu Coil units. The Accu Coil units will normally only be used when your local installer recommends it, depending on heat pump supplier and configuration.

 

The integrated heating coil in the Accu Coil supports pre-heating of DHW, before delivering the DHW to a separate tank with electric booster for raising the temperature up to the desired 65-75°C, to avoid bacterial growth conditions.

Key advantages:

  • Provides heat pumps / solar collectors with optimum working conditions
  • Double sets of flow and return connections for ease of installation
  • With / without electric booster heater depending on heat pump configuration
  • Integrated heating coil supports pre-heating of DHW
Accu - 50R/50RE
Technical Specifications
Quick Facts
Choose volume

Accu Coil is available in 2 volumes, and 2 different configurations, suitable as buffer store from for example a heat pump. The Accu Coil accumulates the produced heat from the heat source, making it available on demand from the user. It is delivered with a heating coil for pre-heating of domestic hot water, and with or without electric booster. It is has double sets of flow/return connections for easy installation with all heat sources. The choice of unit is usually determined by the installer, depending on the complete system requirements.

 

 

 
Prod. nr. Product description Capacity Hot water - 40°C Hot Water / hour - 40°C Heat-up Time - 15 - 75°C: Heat loss - 24 hours Dia x H mm. Weight
8,011,182 Accu Coil 50 RC 300 - coil 2,6m² Buffer Store - Dimensioning Heat Source - ø580x1600 78
8,011,311 Accu Coil 50 RCE 100 - 9 kW1/3x230V + coil 0,8m² Buffer Store - Dimensioning Heat Source - ø430x1170 35
8,011,312 Accu Coil 50 RCE 300 - 15 kW1/3x230V + coil 2,6m² Buffer Store - Dimensioning Heat Source - ø580x1600 78
Product Data Sheet
  - click to expand   - click to collapse
 
Indirect Unit Type Type Type
Product Accu Coil 50RC 300 50RCE 100 50RCE 300
Product No. OSO no. 8,011,182 8,011,311 8,011,312
Product Capacity Persons Buffer Buffer Buffer
Product Segment   Domestic Domestic Domestic
Product
Weight - Net kg 78 35 78
Height - Max mm. 1600 1170 1600
Diameter mm. 580 430 580
Volume - Actual ltr. 275 96 275
Usable hot water draw off at 40°C (ltr) ltr. - - -
Hot Water / hour at 40°C (ltr) ltr. - - -
Heat Up Time - 15°C - max Temp. hours - - -
Standing Heat Loss - 24 hours kWh/24 hours - - -
Dimensions - Cardboard Box LxWxH mm. 595x595x1620 475x475x1330 595x595x1620
Volume - Cardboard Box 0.55 0.30 0.55
Materials
Inner Cylinder Stainless Steel Ferritic Ferritic Ferritic
Coil(s) Stainless Steel Duplex Duplex Duplex
Electric Element(s)) Stainless Steel - Incoloy 825 Incoloy 825
Electric Box and Lid(s) Plastic - V0 Plastic V0 Plastic
Insulation PUR Mineral Wool Mineral Wool Mineral Wool
Outer Casing Steel Epoxy Coated Epoxy Coated Epoxy Coated
Energy Source
Type - Primary   Heat Pump Heat Pump Heat Pump
Type - Secondary   - - -
Temperature - Primary / Lower   Low Temp. Low Temp. Low Temp.
Type - Primary   - - -
Heating Coil(s)
Surface area - Primary / Lower 2.60 0.80 2.60
Surface area - Secondary / Upper - - -
Recommended Flow Rate ltr./min. DHW DHW DHW
Heat Source Buffer Volume ltr. 287 100 287
Electric
Immersion Heater Booster - Capacity kW - 9.0 15.0
Immersion Heater Backup - Capacity kW - - -
Immersion Heater - Phase Phase - 3 3
Immersion Heater - Voltage Volt - 230/400 230/400
Thermostat Type   - - -
Upper Working Thermostat - Temp. Range °C - 60-90 60-90
Upper Working Thermostat - Set Temp. °C - 75 75
Lower Working Thermostat - Temp. Range °C - - -
Lower Working Thermostat - Set Temp. °C - - -
Electrical Installation   - Regulations Regulations
IP Classification   - IP 21 IP 21
Connections
Cold Feed / Hot Water Draw Off Location - - -
Cold Feed / Hot Water Draw Off Compression - - -
Safety Valve (Drain Connection) " (inches) 3/4 - Female 3/4 - Female 3/4 - Female
Safety Valve (Overflow Connection) " (inches) 3/8 - Female 3/8 - Female 3/8 - Female
T&P Valve (Overflow Connection) Compression - - -
Secondary Return / Hot Water w/o mixing " (inches) 5/4 - Female 1 - Female 5/4 - Female
Immersion Heater(s) " (inches) - 1 1
Primary Coil Flow / Return " (inches) 3/4 - Female 3/4 - Female 3/4 - Female
Buffer Volume Flow / Return " (inches) 4x5/4 - Female 4x1 - Female 4x5/4 - Female
Sensor Connection w/ PG nipple mm. - - -
Safety
Safety Valve - Opening Pressure +/- 5 % Bar 3 3 3
T&P Valve - Opening Pressure/Temp. Bar/°C - - -
Safety Thermostat - Cut-out Temp. °C - 98 98
Inner Cylinder - Design Pressure /Temp. Bar/°C 10/99 10/99 10/99
Coil(s) - Design Pressure Bar 10 10 10
Certifications / Approvals
Product Certifications Certificates CE / NEMKO / KIWA / WRAS
Manufacturing Plant Approvals Standards ISO 9001:2008 / ISO 14001:2008 / OHSAS 18001
Environment
Environmental Declaration 100 % Recyclable / >60 % Recycled Materials / ODP of 0 / GWP of 1
Warranty - Water Quality EN 98/83EC
Water - Chloride Content Max - Cl ppm 50 50 50
Water - Sulphate Content Max - So4 ppm 50 50 50
Water - Chloride/Sulphate Content Max ppm 50 50 50
Warranty Period - Inner Cylinder / Parts Years 10 / 2 10 / 2 10 / 2