| Model |
Units |
Main System18HE |
Main System 24HE |
Main System 28HE |
| Boiler only code |
|
5120040 |
5120988 |
5119353 |
| Controls |
|
|
|
|
| Adjustable CH Temperature |
|
Yes |
Yes |
Yes |
| Operating Mode Selector Switch |
|
Yes |
Yes |
Yes |
| LED Operating / Fault Status Display |
|
Yes |
Yes |
Yes |
| |
|
|
|
|
| Gas |
|
|
|
|
| Natural Gas |
|
Yes |
Yes |
Yes |
| Optional LPG Conversion Kit |
|
Yes |
Yes |
Yes |
| Inlet Supply Pressure (Natural Gas) |
mbar |
20 |
20 |
20 |
| Inlet Supply Pressure (Propane) |
mbar |
37 |
37 |
37 |
| Gas Rate |
m3/hr |
1.98 |
2.62 |
3.06 |
| Heat input (maximum) |
kW |
18.7 |
24.8 |
28.9 |
| Heat input (maximum) |
kW |
10.6 |
10.6 |
11.9 |
| Heat output (maximum) non-condensing |
kW |
18 |
24 |
28 |
| Heat output (minimum) non-condensing |
kW |
9.9 |
9.8 |
11 |
| Heat output (maximum) condensing |
kW |
18.9 |
25.2 |
29.3 |
| Heat output (minimum) condensing |
kW |
10.2 |
10.1 |
11.3 |
| Seasonal Efficiency Band |
SEDBUK |
B |
B |
B |
| NOx |
Class |
3 |
3 |
3 |
| |
|
|
|
|
| Electrical |
|
|
|
|
| Electrical Supply |
Volts/Hz |
230 / 50 |
230 / 50 |
230 / 50 |
| Power Consumption |
Watts |
140 |
170 |
180 |
| External Fuse Rating |
Amps |
3 |
3 |
3 |
| Ingress Protection Rating |
|
IPX5D |
IPX5D |
IPX5D |
| Pump Overrun |
|
Yes |
Yes |
Yes |
| 24hr Pump Exercise |
|
Yes |
Yes |
Yes |
| Integral Frost Thermostat (boiler protection only) |
|
Yes |
Yes |
Yes |
| |
|
|
|
|
| Weight |
|
|
|
|
| Maximum Installation Lift Weight |
kg |
38.5 |
40.5 |
40.5 |
| |
|
|
|
|
| Mechanical & Hydraulic |
|
|
|
|
| Safety Pressure Discharge Bar |
|
3 |
3 |
3 |
| Integral Automatic Bypass |
|
Yes |
Yes |
Yes |
| CH System Capacity (maximum) |
Litres |
125 |
125 |
125 |
| Gas Supply Pipe Size |
mm |
22 |
22 |
22 |
| Flow & Return Pipe Size |
mm |
22 |
22 |
22 |
| Condensate Drain Connection |
mm |
21.5 |
21.5 |
21.5 |
| Temporary Filling Loop |
|
Optional |
Optional |
Optional |
| Compartment Ventilation Required |
|
No |
No |
No |
| Pre-Plumbing Jig |
|
Standard |
Standard |
Standard |
| |
|
|
|
|
| Flue Systems |
|
|
|
|
| Standard Concentric Flue Diameter |
mm |
100 |
100 |
100 |
| Standard Flue Installed length |
mm |
685 |
685 |
685 |
| Maximum Equivalent Length Horizontal |
m |
5 |
4 |
3 |
| Maximum Equivalent Length Vertical |
m |
5 |
4 |
3 |
| Optional Twin Pipe Vertical Flue Diameter |
mm |
80 /80 |
80 /80 |
80 /80 |
| Maximum Equivalent Length Vertical Terminal |
m |
10 |
1212 |
|
| |
|
|
|
|
| Plume Displacement Kit |
|
|
|
|
| PDK Maximum Equivalent Length Vertical |
m |
3.5 |
2.5 |
2.5 |
