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OSO Delta Coil DC

- Sets new standards for energy efficiency and heat loss

OSO Delta is a full range of "A" rated unvented hot water cylinders which sets new standards for energy efficiency and heat loss. Delta is available from January 2016 at "A" rating up to 300 litres capacity.

Indirect hot water cylinders are now energy rated according to their standing heat loss, thus measuring the effectiveness of insulation. Delta efficiency will save householders 1kWh every day in heat loss in the most popular 210litre size against a modern C rated cylinder, 1.5kWh per day against a D rated cylinder. Against older cylinders the heat loss should be even more dramatic.

The cylinder boasts very low heat losses through use of the latest generation of foam insulation. The heat loss performance, which is considerably better than most competitors, not only save householders on their energy bills, but also assists housebuilders to achieve ever more stringent energy efficiency requirements.

OSO Delta is the culmination of years of R & D to produce the most energy efficient cylinder possible. Delta uses a completely new method of heat loss reduction to complement factory fitted poly-eurethane foam.

Delta is a very space efficient cylinder and will be available in capacities up to 300 litres in sizes that will all fit in a standard UK airing cupboard.

Delta is available in indirect units for boiler and heat pump and twin coil for solar thermal. It is also available as a pre-plumbed unit, popular with house builders.

Delta is supplied with a digital adjustable thermostat with anti-legionella and holiday modes.

See the Delta advantage (video).

Super Coil SC
Solarcyl RI SD
Technical Specifications
ERP
Choose volume

Delta has energy efficiency advantages over every product on the market, by using a more advanced form of insulation than PU foam. The Delta heat loss advantage against other products increases according to size, as more of the new insulation is used for a larger cylinder. On the smallest unit 120 litres, advantage ranges from single figures up to a 20% advantage, depending on the competing product. The advantage increases steadily to the 300 litre capacity to reach a figure of over 30% against the best competitor to over 50% for many other products. These heat loss advantages will make a real difference to household energy bills.

 

 

 
Prod. nr. Product description Capacity Hot water - 40°C Heat-up (best) - 15°C - max. Recovery (best) - after 75% ERP Rating Heat loss - 24 hours/W Dia x H mm.
DC120 3 kW/1x230V+0,7m² 1-2 pers. 191 ltr. 21 min. 15 min. A 0.85 kWh/35W 595x840
DC150 3 kW/1x230V+0,7m² 2-3 pers. 246 ltr. 24 min. 18 min. A 0.94 kWh/39W 595x1000
DC180 3 kW/1x230V+0,8m² 3-4 pers. 290 ltr. 30 min. 22 min. A 0.98 kWh/41W 595x1165
DC210 3 kW/1x230V+0,8m² 4-5 pers. 306 ltr. 32 min. 24 min. A 1.03 kWh/43W 595x1265
DC250 3 kW/1x230V+0,8m² 5-6 pers. 412 ltr. 43 min. 32 min. A 1.1 kWh/46W 595x1535
DC300 3 kW/1x230V+0,8m² 6-7 pers. 468 ltr. 49 min. 37 min. A 1.15 kWh/48W 595x1745
Product Data Sheet
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Description Unit
Nominal capacity of the water tank at 20°C l 115 145 175 195
Outer diameter of the tank mm 595 595 595 595
Height of the appliance mm 845 1005 1170 1270
Gross weight of the appliance kg 35 39,9 41,7 44,3
Net weight of the appliance kg 32,7 36,9 38,1 40,7
Net weight of the appliance once filled with sanitary water kg 148 186,1 214 239,7
Thermal insulation material PUR+VIP PUR+VIP PUR+VIP PUR+VIP
Thermal insulation of the tank, average thickness mm 50 50 50 50
IP classification 21 21 21 21
Standby losses kWh/24h kWh/24h 0,85 0,94 0,98 1,03
Standby losses Watts W 35,42 39,17 40,83 42,92
Hot water capacity v40 Litres 191 246 290 306
Heat up time min 20,4 24,3 29,6 31,6
Reheat time (1) min 15,3 18,2 22,2 23,7
Primary Heating Power (1) kW 15,8 17,2 17,1 16,9
Primary flowrate for Reheat time and Primary heating power l/h 900 900 900 900
Primary Heat exchanger pressure drop (1) mbar 44 44 47 47
ERP class A A A A
Pressure information
Maximum design pressure of cylinder (rated pressure) MPa / Bar 1 / 10 1 / 10 1 / 10 1 / 10
Max. design pressure of heating coil MPa / Bar 1 / 10 1 / 10 1 / 10 1 / 10
Operating pressure of cylinder MPa / Bar 3,5 3,5 3,5 3,5
Operating pressure of heating coil MPa / Bar 2 2 2 2
Max. operating temperature of cylinder °C 70 70 70 70
Max. operating temperature on the heating coil °C 99 99 99 99
Max. operating temperature on the solar heating coil °C 99 99 99 99
Exchanger information
Primary Heat exchanger volume l 3,8 3,8 3,8 3,8
Primary Heat exchanger surface area 0,69 0,69 0,8 0,8
Ø Int. et Ø Ext. mm/mm ø20,4/ø22 ø20,4/ø22 ø20,4/ø22 ø20,4/ø22
Hydraulic connections
Secondary return mm N/A N/A N/A N/A
Primary heat exchanger flow mm 3/4" 3/4" 3/4" 3/4"
Primary heat exchanger return mm 3/4" 3/4" 3/4" 3/4"
Solar heat exchanger flow mm N/A N/A N/A N/A
Solar heat exchanger return mm N/A N/A N/A N/A
Cold water mm 3/4" 3/4" 3/4" 3/4"
Hot water mm 3/4" 3/4" 3/4" 3/4"
Immersion heater mm 5/4" 5/4" 5/4" 5/4"
Temperature sensor sleeve diameter mm 8 8 8 8
Electrical characteristics
Supply voltage and frequency V/Hz 230/50 230/50 230/50 230/50
Current A 13 13 13 13
Power of the electrical resistance W 3000 3000 3000 3000