Operation Manual
ZENNiOAVANCEYTECNOLOGÍA www.zennio.com
30
¾ Protection Temperature: This parameter fixes the maximum
temperature the user will accept.
9 Protection Temperature is measured in ºCelsius.
9 There is no connection between the “Set Temperature”
and the “Protection Temperature”.
9 This is the real temperature to be applied as
overheating protection.
9 Thermostat will turn Off when temperature in the room
reaches “Protection Temperature – 1ºC”
A small introduction to the Temperature Control methods used by the Z38 is
detailed below.
HYSTERESIS Æ This is one of the control methods the thermostat may use to control a room
temperature. Hysteresis can be used to filter signals so that the output reacts slowly by taking
recent history into account. The only factor to consider when applying this method is the
sensivity range; in this case, by setting this parameter we’ll be setting both the upper and lower
level of the sensivity range (hysteresis).
Next an example: a thermostat controlling a heater may turn the heater on when the temperature
drops below A degrees, but not turn it off until the temperature rises above B degrees. Thus the
On /Off output of the thermostat to the heater when the temperature is between A and B
depends on the history of the temperature. This prevents rapid switching On and Off as the
temperature drifts around a set point.
Consider that, if the GAP (interval between the upper and lower hysteresis points) is too narrow,
devices in charge to transmit and receive the On/Off to the system might be damaged because of
a rapid switching.
The default configuration sets a 2ºC GAP referred to the “Set Temperature”
Note:
The control method the Thermostat uses when this reacts autonomously to the “Freezing
or Overheating Protection” is “2 Points with Hysteresis”.
In this case the lower hysteresis point is 0ºC (referred to the parameterized Temperature) while
the upper point is 1ºC. This means that the system will start working exactly when the
“Protection Temperature” is detected and won’t stop until the room temperature raises one
degree exactly.
LOWERHYSTERESIS
Time
UPPERHYSTERESIS
Tª