Tech Controllers EL480zPID, User Manual

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EL480zPID
19
III.f) Pump activation temperature
The option is used to set the activation temperature for central heating and domestic hot water
pumps (the temperature is measured on the boiler). None of the pumps will operate if the
temperature is lower than the preset one. If the actual temperature is higher than the preset
one the pumps are working but they operate depending on the operation mode (see: pump
operation modes)
III.g) HUW hysteresis
This option is used to set the hysteresis of the set temperature in the reboiler. It is the
maximum difference between the set temperature (that is required in the reboiler) and the
current temperature in the reboiler at which the HUW pump will activate. (for example: when
the set temperature has the value of 55
o
C and the hysteresis is 5
o
C. After reaching the set
temperature, that is 55
o
C, the HUW shuts down and causes activation of the CH pump. Re-
activation of the HUW pump will proceed when the temperature decreases to 50 o C).
III.h) Feeder in auto mode
The option allows enabling and disabling the automatic operation of the feeder. The feeder can
be disabled to feed fuel manually or to shut the boiler down.
III.i) Blowing in auto mode
Automatic operation of the fan can be enabled or disabled using this function. Blowing can be
disabled to manually control the natural chimney draught.