6
F 8S & F 8ST Natural Gas
Category of Appliance
F 8S
II
2H3P
Category of Appliance
F 8ST
I
2H
The appliance is set for Gas Type G20 at 20mbar.
Heat Input
(gross) High Med Low
Low
kW
3.06
2.21 1.50
1.27
Btu/h
10,440 7,540 5,118 4,333
Heat Output
(gross) High Med Low
Low
kW
2.26
1.48 0.6
0.80
Btu/h
7,700 5,050 2,047 2,730
Setting Pressure
Cold
F Range
mbar
19.25 ± 0.75
in wg
7.7 ± 0.3
Setting Pressure
Cold
Comfortstat
mbar
20.00 ± 1.00
in wg
8.0 ± 0.4
Injector Size
CO
1
Nox Class
2
Gas Rate
on HIGH
0.29 m
3
/h (10.28 ft
3
/h)
Gas Connection
F 8S -
R
1
/
4
(
1
/
4
BSP external)
F 8ST
- 8mm nut and olive
Ignition
Piezo Spark
Packed Weight
F 8S & F 8ST
24.4 kg (54 lbs)
Dimensions
F 8S
F 8ST
Height
430mm
430mm
Width
516mm
516mm
Depth
152mm
170mm
(from the wall)
Controls
Rotary gas tap allowing
Non Thermostat
manual adjustment
between low, medium
and high output.
Flame failure device.
Controls
Rotary thermostat allowing
Comfortstat
a lowt position and
adjustment between low and
high temperature settings.
Flame failure device.
Thermocouple
Output
8-13mv
Heat Exchanger
Cast Iron
2.0 Technical Data
F 5 & F 5S Natural Gas
Category of Appliance
II
2H3P
The appliance is set for Gas Type G20 at 20mbar.
Heat Input
(gross) High
Med
Low
kW
2.05
1.41
0.86
Btu/h
7,000
4,800
3,000
Heat Output
(gross) High
Med
Low
kW
1.5
0.98
0.57
Btu/h
5,100
3,350
1,950
Setting Pressure
Cold
mbar
19.7 ± 0.75
in wg
7.9 ± 0.3
Injector Size
CO
2
Nox Class
3
Gas Rate
on HIGH
0.195 m
3
/h (6.89 ft
3
/h)
Gas Connection
R
1
/
4
(
1
/
4
BSP external)
Ignition
Piezo Spark
Packed Weight
F 5
F 5S
18 kg
18.4 kg
(39.7 lbs)
(40.6 lbs)
Dimensions
F 5
F 5S
Height
394mm
394mm
Width
426mm
450mm
Depth
126mm
128mm
(from the wall)
Controls
Rotary gas tap allowing
manual adjustment
between low, medium
and high output.
Flame failure device.
Thermocouple
Output
8-13mv
Heat Exchanger
Cast Iron
Except
Comfort
Stat
Comfort
Stat
Except
Comfort
Stat
Comfort
Stat
Installer Guide
Except
Comfort
Stat
Except
Comfort
Stat
