Tech Controllers ST-976 - Work Algorithm

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CHboilerhysteresis
Thisoptionisusedtosetthehysteresisofthepre‐settemperature. It is the difference between the
temperatureofenteringthesustainmodeandthetemperatureofrestoringoperationmode.
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Example:
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When the pre‐set temperature is 60 ºC, the hysteresis is 3ºC, the device will be disabled at the
temperatureof60ºCwhereasreturningtotheoperationmodetakesplaceat57ºC.
DHWhysteresis
Thisoptionisusedtosetthehysteresisofthepre‐setwatertanktemperature.Itisthedifferencebetween
the pre‐set temperature (desired temperature of the water tank) and the temperature of returning to
operationmode.
Example:
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Whenthepre‐settemperatureis55ºC,thehysteresisis5ºC,thedeviceisdisabledwhenthepre‐set
temperatureof55ºCisreached.Itisactivatedagainwhenthetemperaturedropsto50ºC.
Pumpswitchontemperature
ThisoptionisusedtodefinethetemperatureofCHpumpandDHWpumpactivation(temperaturemeasured
ontheCHboiler).Belowthistemperaturevaluebothpumpsremaininactivewhereasabovethisvaluethe
pumpsareenabledandoperateaccordingtotheoperationmode.
4.3.4 Workalgorithm
Standardoperation
MAIN
MENU
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STANDARD
OPERATION
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Minimumpower
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Maximumpower
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 DecideifyouwanttoadjuststandardoperationparametersforMaximumpowerorMinimumpower
 Tapontheiconoftheparametertobeeditedanddefinetheparametervaluesusingasliderorarrows.
Thisoptionenablestheusertoconfigureoperationtime,frequencyoffeederactivationandblowforcefora
givenpowerlevel.
IfthecontrollercooperateswithLambdasensor,theusermayalsoconfigurethepre‐setamountofoxygenin
fluegasforeachpowerlevel.Then,thefeederandfanoperationwillalsobecontrolledonthebasisofLambda
sensorreadings.
Pre‐setCHtemperature 60°C
Hysteresis 3°C
Enteringsustainmode 60°C
Returntooperationmode 57°C
Pre‐setDHWtemperature 55°C
Hysteresis 5°C
Pumpdeactivation 55°C
Pumpactivation 50°C