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OSO Delta Twin Coil DC

- The ultimate in solar energy efficiency

The Delta Twin Coil is a purpose-designed solar ready unvented cylinder, providing high solar input from the large solar heating coil and substantial Dedicated Solar Volume.

DTC combines carbon free water heating with market leading heat reten­tion, through use of Vacuum Insulation Panels, giving an ErP B rating,. DTC has back-up heating with an upper coil for connection to a boiler. High performance fully flooded design, with expansion vessel supplied with the cylinder.

DTC is the most energy efficient solar cylinder available. Heat losses are very slightly higher than the standard Delta due to the additional connections required for solar cyl­inders.

OSO Solar cylinders are able to provide up to 60% of annual domestic hot water require­ments from free solar energy captured by roof panel collectors.

Solar installations using DTC can be eligible for government backed Renewable Heat Incentive. OSO solar cylinders are ideal for connection with all types of solar collectors and should be connected with a differential controller to complete a high performance system. Both are supplied with twin bosses and dry pockets at low and high levels for insertion of temperature sensor probes. Expansion vessel supplied.

Super Coil SC
Solarcyl RI SD
Technical Specifications
ERP

 

 

 
Prod. no. Product code Dedicated solar Capacity Vol@40°C Weight Upper coil rating Upper recovery time Volume Heat loss ErP Dia x Height
10211600 DTC200 - 3 kW/1X240V + coil 0,9+0,5m² 94 ltr. 4 pers. 284 ltr. 44.3 Kg 16.9 Kw 16.1 min. 192 ltr. 1.18 kWh/d B Ø595x1265mm
10211700 DTC250 - 3 kW/1x240V + coil 0,9+0,5m² 104 ltr. 5 pers. 351 ltr. 51.8 Kg 16.0 Kw 20.6 min. 242 ltr. 1.30 kWh/d B Ø595x1535mm
10211800 DTC300 - 3 kW/1x240V + coil 0,9+0,5m² 104 ltr. 6 pers. 426 ltr. 58 Kg 15.2 Kw 23.6 min. 284 ltr. 1.39 kWh/d B Ø595x1745mm
Product Data Sheet
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Description Unit
Nominal capacity of the water tank at 20°C l 192 242 284
Outer diameter of the tank mm 595 595 595
Height of the appliance mm 1270 1540 1750
Gross weight of the appliance kg 44,3 51,8 58
Net weight of the appliance kg 40,7 48,1 53,2
Net weight of the appliance once filled with sanitary water kg 236,3 290,1 337,2
Material of the tank / integrated heat exchanger 1.4521 / 1.4521 or 1.4162 1.4521 / 1.4521 or 1.4162 1.4521 / 1.4521 or 1.4162
Material of element incoloy 825 incoloy 825 incoloy 825
Thermal insulation material PUR+VIP PUR+VIP PUR+VIP
Thermal insulation of the tank, average thickness mm 50 50 50
IP classification 21 21 21
Standby losses kWh/24h kWh/24h 1,18 1,30 1,39
Standby losses Watts Watts 49,0 54,0 58,0
Hot water capacity (1) >40°C Litres - - -
Heating time (upper coil) min 21,5 37,4 31,4
Heating time (lower/solar coil)
Reheat time (1) (70%, lower/solar coil) min 32,1 45,4 52,8
Dedicated Solar volume l 94 104 104
Primary Heating Power (1) (lower/solar coil) kW 17,9 17 16,3
Primary flowrate for Reheat time and Primary heating power l/h 900 900 900
Primary Heat exchanger pressure drop (1) mbar 44 44 44
ERP class B B B
Pressure information
Maximum design pressure of cylinder (rated pressure) MPa / Bar 1 / 10 1 / 10 1 / 10
Max. design pressure of heating coil MPa / Bar 1 / 10 1 / 10 1 / 10
Max. design pressure of solar coil MPa / Bar N/A N/A N/A
Operating pressure of cylinder MPa / Bar 3,5 3,5 3,5
Operating pressure of heating coil MPa / Bar 2 2 2
Operating pressure of solar coil MPa / Bar
Max. operating temperature of cylinder °C 70 70 70
Max. operating temperature on the heating coil °C 99 99 99
Max. operating temperature on the solar heating coil °C 99 99 99
Expansion solution Aquasystem 3 Bar Aquasystem 3 Bar Aquasystem 3 Bar
Expansion Vessel Capacity l 18 24 24
Exchanger information
Primary Heat exchanger volume l 3,8 3,8 3,8
Primary Heat exchanger surface area 0,69 0,69 0,69
Ø Int. et Ø Ext. mm/mm ø20,4/ø22 ø20,4/ø22 ø20,4/ø22
Solar Heat exchanger volume l 3,8 3,8 3,8
Solar Heat exchanger surface area 0,69 0,69 0,69
Ø Int. et Ø Ext. mm/mm ø20,4/ø22 ø20,4/ø22 ø20,4/ø22
Hydraulic connections
Secondary return mm 1/2 1/2 1/2
Primary heat exchanger flow inch 3/4" 3/4" 3/4"
Primary heat exchanger return inch 3/4" 3/4" 3/4"
Solar heat exchanger flow inch 3/4" 3/4" 3/4"
Solar heat exchanger return inch 3/4" 3/4" 3/4"
Cold water inch 3/4" 3/4" 3/4"
Hot water inch 3/4" 3/4" 3/4"
Immersion heater inch 5/4" 5/4" 5/4"
Safety valve (factory fitted) inch 1/2 1/2 1/2
T & P Valve (factory fitted) inch 1/2 1/2 1/2
Pressure reducing valve inch 3/4 3/4 3/4
Temperature sensor sleeve diameter mm 8 8 8
Electrical characteristics
Supply voltage and frequency V/Hz 230/50 230/50 230/50
Current A 13 13 13
Power of the electrical resistance W 3000 3000 3000
Electrical installation IEEE regs IEEE regs IEEE regs
Thermostat type - immersion / cylinder Probe/Probe Probe/Probe Probe/Probe
Immersion capaticy Kw 3 3 3
Immersion heater - phase Phase Single Single Single
Immersion heater - voltage Volt 230/50 230/50 230/50
Immersion thermostat - temp range °C 18-70 18-70 18-70
Immersion thermostat - set temp °C 60 60 60
Indirect thermostat - temp range °C 25-65 25-65 25-65
Indirect thermostat - set temp °C 60 60 60
Safety
Safety valve opening pressure +/- 5% Bar 6 6 6
T & P valve opening pressure/temp Bar/°C 10/90 10/90 10/90
Safety thermostat cutout - immersion °C 87 87 87
Safety thermostat cutout - cylinder °C 80 80 80
Packaging
Width of box mm 610 610 610
Depth of box mm 610 610 610
Height of box mm 1320 1570 1780
Weight of box kg 49 57 63