Heat Output kW

12-18

20-20+20-26

26-35

35-44+58

73

80-100

CONNECTIONS

Heating Flow

1” BSP

1” BSP

1” BSP

1½” BSP

1½” BSP

2” BSP

Heating Return

1” BSP

1” BSP

1” BSP

1½” BSP

1½” BSP

2” BSP

Drain Off Valve

½” BSP

½” BSP

½” BSP

½” BSP

½” BSP

½” BSP

Condensate Trap

22mm dia. plastic

WATER CONTENT

Boiler

24 litres

24 litres

24 litres

43.5 litres

54 litres

75 litres

FLUE

Balanced Flue Assembly

125 (5”) mm dia.

125 (5”)  
mm dia.

125 (5”) mm dia.

150 (6”)
mm dia.

180 (7”) mm dia.

200 (8”) mm. dia.

Max. Low Level Flue Length

1.5 m

1.5 m

1.5 m

1.5 m

1.5 m

1.5 m

Max. High Level Balanced Flue Length

6 m

6 m

6 m

6 m

6 m

6 m

HEATING SYSTEM (SEALED)

Fit in accordance with BS 7074, Part 1, BS 5449, OFTEC standards and all other relevant legislation.

Preset Pressure Relief Valve

2 bar

WATER SIDE RESISTANCE

Flow rate to give a nominal output at 10K differential
Flow Rate Measured (kg/h)
1642 kg/h (12-20kW),  2135 kg/h (20-26kW),   2874 kg/h (26-35kW)
Waterside Resistance (mbar) 0.18

Flow rate to give a nominal output at 20K differential
Flow Rate Measured (kg/h)
870 kg/h (12-20kW), 1131 kg/h (20-26kW),   1523 kg/h  (26-35kW)
Waterside Resistance (mbar) 0.19

PRESSURE JET OIL BURNERS

RIELLO RDB 2.2 up to 44kW & RIELLO RDB 4.2 from 58kW to 100kW

FUEL

Kerosene 28 Second Class C

ELECTRICAL SUPPLY

230V AC 50Hz 5A

TEMPERATURE CONTROL

 Thermostats have an operating tolerance of + 4˚C.

Boiler Central Heating Control

60°C - 80°C 

Boiler Safety Limit

110°C