65
®
Options 36.1 to 36.3 - Calorific values of fuels 1 to 3 respectively (0.0 – 99.9)
These option parameters are only available if option 36.0 (inlet temperature sensor) is not set to zero.
If a display of calculated burner efficiency is required, the calorific value of the required fuels must
be entered. May be set between 0.0 and 99.9 MJkg-1 inclusive.
A display of burner efficiency is not available when firing multiple fuel combinations.
Options 36.4 to 36.6 - Hydrocarbon ratios of fuels 1 to 3 respectively (0.00 – 9.99)
These option parameters are only available if option 36.0 (inlet temperature sensor) is not set to zero.
If a display of calculated burner efficiency is required, the hydrocarbon ratios for the required fuels
must be entered. May be set between 0.0 and 9.99 inclusive, where the value entered is the hydrocar-
bon ratio x 10. For example, for a hydrocarbon ratio of 0.157, a value of 1.57 should be entered.
Display of burner efficiency is not available when firing multiple fuel combinations.
The table below shows the calorific values and hydrocarbon ratios of several common fuels. These
values should be used as a guide only. Gross calorific values should be used for display of gross effi-
ciency.
Option 36.7 - Boiler radiated heat loss (0.0 – 9.99%)*
This option parameter is only available if option 36.0 (inlet temperature sensor) is not set to zero.
For accurate calculation of boiler gross efficiency, this option parameter must be set to the heat lost
through the shell of the boiler at high fire as a percentage of the burner's output at high fire. The
range of this parameter is 0.0 to 9.9%.
Option 37.0 - Flue temperature alarm select (0/1)*
Option parameter 37.0 is only available with a flue monitor interface (FMI) board installed in option
slot 2.
If option 37.0 is set to 0, the flue temperature high and low alarms are disabled.
If option 37.0 is set to 1, the flue temperature high and low alarms are enabled and option parameters
37.1 to 38.7 become available.
Options 37.1 to 37.7 - Flue temperature low alarm values (0 – 999)*
Using option parameters 37.1 to 37.7, it is possible to set a different flue temperature low alarm
value for each profile combination. Each option parameter may be set to any value between 0 and
999 inclusive. The temperature units should be set with respect to option parameter 03.1.
If the burner is firing, it is only possible to make an adjustment to the option parameter which relates
to the selected profile. If the burner is not firing, the low alarm value for any profile selection may be
adjusted.
When the flue temperature drops below the low alarm value for the selected profile, a fault number
will appear.
Options 38.1 to 38.7 - Flue temperature high alarm values (0 – 999)*
Using option parameters 38.1 to 38.7, it is possible to set a different flue temperature high alarm
value for each profile selection. Each option parameter may be set to any value between 0 and 999
inclusive. The temperature units should be set with respect to option parameter 03.1.
If the burner is firing, it is only possible to make an adjustment to the option parameter which relates
to the selected profile. If the burner is not firing, the high alarm value for any profile selection may
be adjusted.
FUEL
GROSS CALORIFIC VALUE
NET CALORIFIC VALUE
HYDROCARBON RATIO (x10)
Gas
52.8
47.6
3.20
Light Oil
45.6
42.8
1.57
Medium Oil
43.1
40.8
1.35
Heavy Oil
42.9
40.5
1.28
