Enviromax Combi-Combipac - Technical Information

 

 

Enviromax Combi - Technical Information

Heat Output kW

12-20+20-26

26-35

CONNECTIONS

-

-

Heating Flow

22 mm dia.

28 mm dia.

Heating Return

22 mm dia.

28 mm dia.

Mains Cold Feed (Copper)

15 mm dia.

15 mm dia.

Hot Water Delivery (Copper)

15 mm dia.

15 mm dia.

Drain Off Valve

1/2" BSP

1/2" BSP

Safety Pressure Valve Outlet (Copper)

15 mm dia.

15 mm dia.

Condensate Trap

22 mm dia. plastic

CIRCULATING PUMP

25/60

25/60

Domestic Hot Water Plate Heat Exchanger

25 plate

31 plate

Integral Expansion Vessel Normal Capacity

12 litres

12 litres

Expansion Vessel Pre-charge Pressure

1 bar

1 bar

Low Pressure Water Switch?

Yes

Yes

Filling Loop Included?

Yes

Yes

WATER CONTENT

-

-

Water Content Boiler

24 litres

24 litres

Water Content Primary Tank

40 litres

40 litres

D.H.W. GUIDE PERFORMANCE

Where water demand exceeds this, a flow restrictor is recommended. This will ensure a water supply at an adequate temperature.

(120 litre draw-off at 40°C Delta Δt)

16 litres/min.

20 litres/min.

FLUE

-

-

Balanced Flue Assembly

125 (5") mm dia.

125 (5") mm dia.

Max. Low Level Flue Length

1.5 m

1.5 m

Max. High Level Flue Length

6 m

6 m

HEATING SYSTEM (SEALED)

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

Max. Operating Pressure

2.5 bar

Max. System Pressure Cold

1.5 bar

Min. System Pressure Cold

0.5 bar

Preset Pressure Relief Valve

3 bar

MAINS WATER SUPPLY PRESSURE

Min. 1 bar - Max. 10 bar (for user comfort, we recommend pressure at tap to be between 2 and 5 bar).

Limescale excess: when over 150/200 ppm, fit appropriate scale reducer.

WATER SIDE RESISTANCE

Flow rate to give a nominal output at 10K differential

Flow Rate Measured (kg/h) 

1642 kg/h (20kW), 2135 kg/h (26kW), 2874 kg/h (35kW)

Waterside Resistance (mbar) 0.18, 0.18, 0.18

Flow rate to give a nominal output at 20K differential

Flow Rate Measured (kg/h) 

870 kg/h (20kW), 1131 kg/h (26kW), 1523 kg/h  (35kW)

Waterside Resistance (mbar) 0.19, 0.19, 0.19

PRESSURE JET OIL BURNERS

RIELLO RDB 2.2

FUEL

Kerosene 28 Second Class C

ELECTRICAL SUPPLY

230V AC 50Hz 5A

THERMOSTATS

 

Boiler Central Heating Control

60°C - 80°C

Boiler Safety Limit

110°C

Tank (DHW) - Fixed

78°C

Early Alert - Fixed

87°C

Over-run - Fixed

93°C



 

 

 

 

Enviromax Combi - Technical Information

Boiler Model

HEAT OUTPUT- kW

Max BTU/h ('000)

C20/C26

15-20/20-26

50-90

C35

26-35

90-120

CONNECTIONS

-

-

Heating Flow

22 mm

28 mm

Heating Return

22 mm

28 mm

Mains Cold Feed (Copper)

15 mm

15 mm

Hot Water Delivery (Copper)

15 mm

15 mm

Drain Off Valve

1/2" BSP

1/2" BSP

Safety Pressure Valve Outlet (Copper)

15 mm

15 mm

Condensate Trap

22 mm PLASTIC

CIRCULATING PUMP

25/60

25/60

Domestic Hot Water Plate Heat Exchanger

25 plate

31 plate

Integral Expansion Vessel Normal Capacity

12 litres

12 litres

Expansion Vessel Pre-charge Pressure

1 bar

1 bar

Low Pressure Water Switch?

Yes

Yes

Filling Loop Included?

Yes

Yes

WATER CONTENT

-

-

Water Content Boiler (litres)

24

24

Water Content Primary Tank (litres)

40

40

D.H.W. GUIDE PERFORMANCE

-

-

in litres/min (120 litre draw-off at 40°C Delta t)

16

20

FLUE

-

-

Balanced Flue Assembly (mm)

125 (5")

125 (5")

Conventional Flue Assembly (mm)

130 id.

130 id.

Max. Low Level Flue Length (metres)

3

3

Max. High Level Flue Length (metres)

6

6

Max. Vertical Level Flue Length(metres)

6

6

HEATING SYSTEM (SEALED)

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

Max. Operating Pressure

2.5 bar

Max. System Pressure Cold

1.5 bar

Min. System Pressure Cold

0.5 bar

Preset Pressure Relief Valve

3 bar

MAINS WATER SUPPLY PRESSURE

Min. 1 bar - Max. 10 bar
(for user comfort, we recommend pressure at tap to be between 2 and 5 bar).
Limescale excess: when over 150/200 ppm, fit appropriate scale reducer.

WATER SIDE RESISTANCE

Flow rate to give a nominal output at 10K differential
Flow Rate Measured (kg/h) 2874.24
Waterside Resistance (mbar) 0.18
Flow rate to give a nominal output at 20K differential
Flow Rate Measured (kg/h) 1522.92
Waterside Resistance (mbar) 0.19

PRESSURE JET OIL BURNERS

RIELLO RDB 2.2 up to C44 & RIELLO RDB 4.2 from C58 to C100

FUEL

C2 Kerosene

ELECTRICAL SUPPLY

230V AC 50Hz 5A

THERMOSTATS

 

Boiler Central Heating Control

60°C - 80°C

Boiler Safety Limit

110°C

Tank (DHW) - Fixed

78°C

Early Alert - Fixed

87°C

Over-run - Fixed

93°C



 

 

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