Additional parameter 368
Param. nr
Description
Factory
setting
368
BT300 Limit by which pre-ventilation can be completed with
channel 4 (VSM).
Pre-ventilation limit (also post-ventilation) is set with
channel 4. Enter the upper limit to which the channel runs
open during pre-ventilation. If you enter 999 (default value)
the channel runs to its upper stop. Set the pre-ventilation
limit for example with air dampers to shorten the pre-
ventilation period. In this case, remember to assure the
exchange of air.
999
Warning:
● A continuous output limits the setpoint. Note that you have to enter the range limits of the feedback
manually. With continuous outputs the feedback value for the limitation is calculated and saved in the
device during the automatic range-limit calculation.
● Note that the feedback reaches the value of the limitation during the automatic calculation of the
range limits. The feedback is used for the monitoring of the channel’s pre-ventilation position.
● After the activation or changing of the pre-ventilation limit of a continuous channel you have to run an
automatic calculation of the range limits.
Refer to the variable speed module user instructions.
Parameter value setting 0–999 equals 0–100% setpoint output for variable speed
module.
If burner fan motor nominal current value is exceeded, parameter value must be
lowered.
While changing the parameter value the burner must get enough air during prepurge.
During prepurge, the amount of air in the burner has to equal five times the volume of
combustion chamber and flue gas channel (industrial applications).
4.12 Setting gas pressure regulator SKP
The operating area of the gas pressure regulator is determined by the spring installed
inside the pressure regulator. There are three types of springs and their operating
areas are described in the table below.
Springs can be ordered from Oilon Webshop.
M5178 1647EN
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