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OSOMaxi Accu - 51R

  - Large capacity thermal stores

The Maxi Accu units functions as heat stores for heat pumps / solar collectors, in addition to being designed for storing cold water with special, diffusion tight plastic covering the insulation against the outside air. This prevents the condensation against the cold inner surface of the tank. All Accu units have double sets of flow & return connections, which provide all possible fitting possibilities.

51R ensures that the heat pump / solar collectors have optimum working conditions, and provides stable temperatures for the installation. It is also suitable for climatisation installations with cooling units, where the cold store provides a necessary buffer for the system. The excess heat from the cooling units can provide practically free domestic hot water, if an accumulator tank is installed as a pre-heater (for instance Maxi Buffer).

 

The Maxi Accu units are manufactured from stainless steel up to 1,000 liters or mild steel when up to 5,000 liters.

Key advantages:

  • Stainless steel pressure vessel for working pressures up to 10 bars
  • Thermal store for hot or cold water with diffusion tight sealing
  • Can be manufactured to customer specification up to 5,000 liters
Maxi Buffer - 17RB
Maxi Marine - 17RA
Technical Specifications
Quick Facts
Choose volume

Maxi Accu is available in 8 volumes, suitable as buffer store from for example a heat pump. The Accu accumulates the produced heat from the heat source, making it available on demand from the user. It 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 - kg
8,160,003 Maxi Accu 51R 300 Buffer Dimensioning Dimensioning Heat Source   ø580x1600 59
8,160,004 Maxi Accu 51R 400 Buffer Dimensioning Dimensioning Heat Source   ø580x2085 79
8,160,006 Maxi Accu 51R 600 Buffer Dimensioning Dimensioning Heat Source   ø780x1900 133
8,160,009 Maxi Accu 51R 1000 Buffer Dimensioning Dimensioning Heat Source   ø1000x2100 238
8,160,013 Maxi Accu 51R 1500 Buffer Dimensioning Dimensioning Heat Source   ø1200x2150 500
8,160,016 Maxi Accu 51R 2000 Buffer Dimensioning Dimensioning Heat Source   ø1300x2200 700
8,160,019 Maxi Accu 51R 3000 Buffer Dimensioning Dimensioning Heat Source   ø1500x2450 950
8,160,023 Maxi Accu 51R 5000 Buffer Dimensioning Dimensioning Heat Source   ø1800x2950 1,400
Technical Data Sheet
  - click to expand   - click to collapse
 
Indirect Unit Type Type Type Type
Product Maxi Accu 51R 300 51R 400 51R 600 51R 1000
Product No. OSO no. 816.0003 816.0004 816.0006 816.0009
roduct Capacity Persons Buffer Store Buffer Store Buffer Store Buffer Store
Product Segment   Commercial Commercial Commercial Commercial
Product
Weight - Net kg 59 79 133 238
Height - Max mm. 1600 2085 1900 2100
Diameter mm. 580 580 780 1000
Volume - Actual ltr. 287 380 550 900
Usable hot water draw off at 40°C (ltr) ltr. Dimensioning Dimensioning Dimensioning Dimensioning
Hot Water / hour at 40°C (ltr) ltr. Dimensioning Dimensioning Dimensioning Dimensioning
Heat Up Time - 15°C - max Temp. hours Heat Source Heat Source Heat Source Heat Source
Standing Heat Loss - 24 hours kWh/24 hours - - - -
Dimensions - Cardboard Box LxWxH mm. 595x625x1620 595x625x2250 820x930x2040 1040x1140x2240
Volume - Cardboard Box 0,59 0,82 1,45 2,49
Materials
Inner Cylinder Stainless Steel Ferritic Ferritic Ferritic Ferritic
Coil(s) Stainless Steel - - - -
Electric Element(s) Stainless Steel - - - -
Electric Box and Lid(s) Plastic - - - -
Insulation PUR Mineral Wool Mineral Wool Mineral Wool Mineral Wool
Outer Casing Steel Epoxy Coated Epoxy Coated Epoxy Coated Epoxy Coated
Energy Source   Suggested Suggested Suggested Suggested
Type - Primary   All All All All
Type - Secondary   - - - -
Temperature - Primary / Lower   High/Low Temp. High/Low Temp. High/Low Temp. High/Low Temp.
Temperature - Secondary / Upper   - - - -
Heating Coil(s)
Surface area - Primary / Lower - - - -
Surface area - Secondary / Upper - - - -
Recommended Flow Rate ltr./min. - - - -
Heat Source Buffer Volume ltr. - - - -
Electric
Immersion Heater Booster - Capacity kW - - - -
Immersion Heater Backup - Capacity kW - - - -
Immersion Heater - Phase Phase - - - -
Immersion Heater - Voltage Volt - - - -
Thermostat Type   - - - -
Upper Working Thermostat - Temp. Range °C - - - -
Upper Working Thermostat - Set Temp. °C - - - -
Lower Working Thermostat - Temp. Range °C - - - -
Lower Working Thermostat - Set Temp. °C - - - -
Electrical Installation   - - - -
IP Classification   - - - -
Connections
Cold Feed / Hot Water Draw Off Location - - - -
Cold Feed / Hot Water Draw Off " (inches) - - - -
Drain Connection " (inches) 3/4 - Female 3/4 - Female 3/4 - Female 3/4 - Female
Safety Valve (Overflow Connection) " (inches) - - - -
T&P Valve Connection " (inches) - - - -
Secondary Return / Hot Water w/o mixing " (inches) 3/4 - Female 3/4 - Female 3/4 - Female 3/4 - Female
Immersion Heater(s) " (inches) - - - -
Primary Coil Flow / Return " (inches) - - - -
Secondary Coil Flow / Return " (inches) 2 x 1 1/2 2 x 1 1/2 2 x DN 80 2 x DN 100
Sensor Connection " (inches) - - - -
Safety
Safety Valve - Opening Pressure +/- 5 % Bar - - - -
T&P Valve - Opening Pressure/Temp. Bar/°C - - - -
Safety Thermostat - Cut-out Temp. °C - - - -
Inner Cylinder - Design Pressure /Temp. Bar/°C 10/99 10/99 10/99 10/99
Coil(s) - Design Pressure Bar - - - -
Certifications / Approvals
Product Certifications Certificates CE / NEMKO
Manufacturing Plant Approvals Standards ISO 9001:2008 / ISO 14001:2008 / OHSAS 18001
Environment
Environmental Declaration    
Warranty - Water Quality EN 98/83EC
Water - Chloride Content Max - Cl ppm 250 250 250 250
Water - Sulphate Content Max - So4 ppm 250 250 250 250
Water - Chloride/Sulphate Content Max ppm 250 250 250 250
Warranty Period - Inner Cylinder / Parts Years 10 / 2 10 / 2 10 / 2 10 / 2