Supplied By www.heating spares.co Tel. 0161 620 6677
37
Fig. 37
Fan speed in RPM
kW
Output BTU/H
102,360
68,240
17,060
0
51,180
34,120
85,300
●
check that the correct value is still being
obtained. If not, repeat the above procedure;
●
press the RESET button to exit the appliance
engineer mode.
Remove the analyser test probe from the analysis
test point and refit cap. Refit the air chamber
cover. Refit appliance casing.
NOTE
You should ensure that all radiators or heat
emitters are fully open during the above
procedures. This will ensure that the fan speed
(output) of the boiler is not compromised due to a
high flow temperature.
10.6
RANGE RATING
The output of the boiler is automatically adjusted
by a continuous air/gas modulation system. The
system is controlled by the NTC thermistors (flow
& return temperature sensors) which ensures
stability of temperature irrespective of load
conditions. However the appliance also has a
range rating facility which can be used to limit the
maximum output - to central heating- if required.
Please refer to 7.3.1 & fig. 37 for more details.
0
5
10
15
20
25
30
1500
2000
2500
3000
3500
4000
4500
5000
5500
50
°
C flow & 30
°
C
return temperature
80
°
C flow & 60
°
C
return temperature