42
Bentone B40 MF/B45-2 MF
For installers
6.2 Adjustment of preheater
operating thermostat
The check of which temperature is required to ensure proper ignition and
stable operation is done by setting the preheater thermostat to its maximum
temperature.
If good start is obtained, the temperature is lowered gradually until an
unacceptable start or operation is no longer available. During this procedure,
it is of great importance that the boiler itself is not hot. Instead, the setting
procedure must be carried out with a boiler that is at a temperature that can
be regarded as a cold start temperature.
Once the breakpoint temperature for when good start/operation can no
longer be ensured has been found, the preheater's operating thermostat
must be set to a temperature with a certain margin against the breakpoint
temperature. This is done to avoid the burner having a bad start/operation
when environmental factors change over time.
New oil delivery and/or substantial modification of environmental factors may
necessitate an adjustment to be made to the preheater thermostat.
6.2.1 Basic settings, preheater
Fuel
Temperature °C
RME 60
Bio oils 130-160
Fossil oils with viscosity 120 mm²/s 145
Fossil oils with viscosity 90 mm²/s 115
Fossil oils with viscosity 60 mm²/s 85
Fossil oils with viscosity 20 mm²/s 60
Fossil oils with viscosity 6 mm²/s 0
For oils not specified in the table, the temperature of the preheater should
be set so that a viscosity of about 5-10 mm²/s is after preheating. In some
instances, a different temperature than that indicated in the above table may
be required due to the characteristics of the oil, e.g. ignition propensity.
!
When using a new oil grade, check combustion and adjust the
burner settings in order to achieve good combustion.
To Next Page
Loading...