Technical Data - Benchmark MAIN Installation & Service Instructions Manual

Appliance Type C
12
Appliance Category
Heat Input
Max
kW 18.7
Heat Output (Non-Condensing)
Max
kW 18
Heat Output (Condensing)
Max
kW 18.9
Max Gas Rate (Natural Gas - G20)
(After 10 Mins)
m 3 /h 1.98
Burner Pressure (Natural Gas - G20)
Max Rate
mbar 8.6 ± 0.5
Inlet Pressure (Natural Gas - G20)
mbar 20
Burner Injector (Natural Gas - G20)
12 x 1.18mm Diameter
Electrical Supply
(Appliance must be connected to an
earthed supply)
Power Consumption
External Fuse Rating
Internal Fuse Rating
Fuse 2A Fast Blow to BS 4265
Electrical Protection
IPX5D
SEDBUK Declaration For System 18 HE
The seasonal efficiency (SEDBUK) is 87.4% (87.3% LPG)
This value is used in the UK Government's Standard Assessment Procedure
(SAP) for energy rating of dwellings. The test data from which it has been
calculated have been certified by 0051.
LPG Propane - G31
Burner Injector 0.77mm diameter
Burner Pressure
Propane mbar
Inlet Pressure
mbar
10
© Baxi Heating UK Ltd 2007
C C
NO x Class
32 52
CAT II
2H 3P
Condensate Drain
Flue Terminal
Min
Dimensions
10.6
Connections
Gas Supply
Central Heating Flow
Min
Central Heating Return
9.9
Pressure Relief Discharge
Outercase Dimensions
Min
Casing Height
10.2
Overall Height Inc Flue
Elbow
Casing Width
Casing Depth
Clearances
Above Casing
Min Rate
Below Casing
3 ± 0.5
Front
Front
L.H. Side
R.H. Side
*NOTE: The boiler can be operated with a
clearance of 5mm at the right. This is also
230V~ 50H z
sufficient for routine maintenance. However a
clearance of 20mm is required if it is necessary to
remove the secondary heat exchanger. This
should be considered when siting the appliance
140W
and in the event of any subsequent alterations in
the area of installation
3A
Weights
Packaged Boiler Carton
Installation Lift Weight
Band B
Max Rate Min Rate
20 ± 0.5
6.6 ± 0.2
37

4.0 Technical Data

4.1
3
1" BSP
Diameter 100mm
Projection 125mm
copper tails
- 22mm
- 22mm
- 22mm
- 15mm
- 780mm
- 965mm
- 450mm
- 345mm
200 mm Min
200 mm Min
450 mm Min (For Servicing)
5 mm Min (In Operation)
5mm Min
5mm Min (In Operation)
20mm Min (See Note*)
kg
49
38.5
Pump - Available Head
5
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
0 200 400
System 18 HE
Central Heating Primary Circuit
Pressures
Safety Discharge
Max Operating
Min Operating
Recommend Operating
Pump
Available Head See graph below
Expansion Vessel - (For Central Heating
only. Integral with appliance)
Min Pre-charge Pressure
Max Capacity of
CH System
Primary Water Content
of Boiler (unpressurised)
Temperatures
Flow Temp
(adjustable)
35°C to 85°C
600 800 1000
Flow Rate (l/h)
bar
3
2.5
0.5
1-2
bar
0.5
litre
125
1.2
(± 5°C)
max
1200