Burkert 0911 Instructions De Service page 11

NEUTRAL ZONE CONTROLLER
Example:
Default for set-value SET1 = 50°C (for control circuit No. 1). In order to
configure a neutral zone control behaviour, always predefine:
SET2 = 0 Kelvin; LS2 = 0 and US2 = 0.
Configure the function of Relay 1 („uscita1" in the following diagram):
S1C = in (heating) and Hy1= -2 Kelvin).
Configure the function of Relay 2 („uscita2" in the following diagram):
S2C = dir (heating) and Hy2= +2 Kelvin).
Result (see following diagram):
SET1 = Set Point; db = Hy1 = Hy2
If the neutral zone SET1 - Hy1 is undershot, heating will take place (Relay 1
activated) until the set-value SET1 is reached. If the room temperature
exceeds the neutral zone SET1 + Hy1, Relay 2 is activated (cooling) and will
be switched off again at exactly SET1.
ON
OFF
db
NOTE
Different values can also be predefined in Hy1 and Hy2. In this
way, the switch-off point can be changed within the neutral
zone!
Variable
db
Set point
0911 - 9