fully pumped open vented & sealed systems
Gas Connection
G 1/2"
B.S.P. Thread
Controls
boiler thermostat, safety thermostat, flow switch, electronic
flame sensing, temperature protection thermostat &
condensate blockage sensor
Inlet Pressure at Gas Valve
(Natural Gas)
Min
18.1 mbar
Max
22.5 mbar
Flow Temperature
(adjustable)
55° C to 78° C (± 5° C)
Recommended System Temperature Drop
Condensing
20°C
NOTE
: All data in this section are nominal values and subject to normal production tolerances
page 10@
4.2 Technical Parameters
Technical parameters for boiler space heaters
Main Heat ErP
12
15
18
24
30
Condensing boiler
Yes
Yes
Yes
Yes
Yes
Low-temperature boiler(1)
No
No
No
No
No
B1 boiler
No
No
No
No
No
Cogeneration space heater
No
No
No
No
No
Combination heater
No
No
No
No
No
Rated heat output
Prated
kW
12
15
18
24
30
Useful heat output at rated heat output and high temperature regime
P
4
kW
12.0
15.0
18.0
24.0
30.0
Useful heat output at 30% of rated heat output and low temperature regime(1)
P
1
kW
3.8
4.8
5.9
7.8
9.7
Seasonal space heating energy efficiency
n
s
%
91
91
92
92
92
Useful efficiency at rated heat output and high temperature regime(2)
n
4
%
90.3
88.6
90.3
88.3
89.5
Useful efficiency at 30% of rated heat output and low temperature regime(1)
n
1
%
96.5
96.5
96.5
96.8
96.5
Auxiliary electricity consumption
Full load
elmax
kW
0.070
0.080
0.110
0.130
0.145
Part load
elmin
kW
0.007
0.007
0.007
0.007
0.007
Standby mode
P
SB
kW
0
0
0
0
0
Other items
Standby heat loss
P
stby
kW
0.100
0.100
0.100
0.100
0.100
Summary of Contents for Main Heat 12
Page 8: ...Fig 3 Fig 4 Fig 5 Fig 6...
Page 38: ...Example 1 Example 2 Example 3...
Page 40: ...Fig E Fig F...
Page 51: ...Fig 31 Fig 32 Fig 33...
Page 55: ...Fig 35 Fig 36 page 39 12 2 Checking the Combustion 1 Follow the flow chart opposite...
Page 56: ......
Page 63: ...Fig 45 Fig 46...
Page 66: ......
Page 69: ...Fig 55 Fig 56 Fig 57 Fig 58...
Page 72: ...page 52...
Page 74: ...page 54...
Page 75: ...DRY FIRE...
Page 76: ...page 55 IGNITION LOCKOUT...
Page 77: ...page 56 OVERHEAT LOCKOUT...
Page 78: ...page 57 FAN LOCKOUT NOTE The fan is supplied with 325 Vdc...
Page 80: ...warranty This does not affect the customer s statutory rights page 62...
Page 82: ...page 63...
