EQJW145: Heating controller
Commissioning
28
7010015003 A
© Fr. Sauter AG
Return temperature recording
If a return temperature sensor is to be used, this parameter must be set to 1.
Correction to return temperature
The measured value for the return temperature is calibrated with the help of
this SERVice parameter. The value that was entered is added to the
measured value for the return temperature. If there are two return sensors
(MOD3), this parameter only affects the TRF of the heating circuit.
Proportional band
SERVice parameter 15 specifies the proportional band (XP) of PI control for
the flow temperature in K.
Proportional band – 2nd control circuit (only MOD3)
SERVice Parameter 16 specifies the proportional band (XP) of PI control for
the second control circuit in K.
Reset time
SERVice parameter 17 specifies the reset time (TN) of PI control for the flow
temperature in seconds.
Reset time – 2nd control circuit (only MOD3)
SERVice parameter 18 specifies the reset time (TN) of PI control for the
second control circuit in seconds.
Runtime for actuator of control valve
Valves with a motorised actuator need a specified time to open or close
completely. This is known as the valve runtime. This SERVice parameter is
used to set the equitherm EQJW 145 to the runtime of the valve drive that is
used. Optimal control quality and various protective functions are only
ensured if the valve runtime is set correctly.
Runtime for second actuator
Depending on the control model, a second control valve is used on the
primary side, or a changeover valve is used on the secondary side. SERVice
parameter SP20 is used to set the valve runtime for the second actuator.
Minimum and maximum limits for flow temperature
The setpoint for the flow temperature can be limited. The value of SERVice
parameter SP21 sets the lower limit in this case, and the value of SERVice
parameter 22 sets the upper limit. Parameters SP21 and SP22 specify a
minimum and maximum flow temperature.
Limiting function for the return temperature
A limiting function can be set for the primary-side return temperature of the
converter. If the value falls below the limiting function, the flow temperature is
adjusted (also see SP28). The following illustration shows the limiting
function.
SP13
SP14
SP15
SP16
SP17
SP18
SP19
SP20
SP21, 22
SP23 – SP27
Содержание EQJW145
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