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User’s Manual
18
Note!
Between the points of Max and Min T.Out the valve
position is calculated with linear characteristics. For example at
half the range, the valve will be 50% opened.
Initial heating / Preheating time
– setting for the initial heating
timer. After that time unit starts normal operation and the valve
opening relies on the PI regulators for heating sequence.
▪
Low limit: 0s
▪
High limit: 3600s
▪
Default: 30s
Initial heating / Fall ramp
– time for the valve to close after
completing the initial heating procedure. By the time of controlled
closing, the valve position should meet the actual signal from
the PI output, so the crossing throug 0% valve opening will
be avoided. The fall ramp is intended to minimize the risk of
freezing alarms, which could happen in case of closing the valve
suddenly.
▪
Low limit: 0s
▪
High limit: 3600s
▪
Default: 30s
Pump work temp.
– setting for the external temperature which
forces the circulation pump to work continuously.
▪
Low limit: -20°C
▪
High limit: 15°C
▪
Default: 8°C
Min. valve open
– lower limit for the valve position. In working
unit, the valve control signal will be at least at that level
▪
Low limit: 0%
▪
High limit: 100%
▪
Default: 0%
Pump protection / Set protection
– setting to enable/disable
the protection against sticky sealing issue. The sticky sealing
could happen in case of long term inactivity of the pump, when
contaminations and deposits from the water could damage the
mechanical sealing
▪
Not active (default setting)
▪
Active
Pump protection / Stoppage period
– setting of the resting
time for the pump
▪
Low limit: 1day
▪
High limit: 30days
▪
Default: 7days
Pump protection / Run time
– setting of the operation time for
the pump
▪
Low limit: 1s
▪
High limit: 3600s
▪
Default: 30s
Preheating time
30s
Fall ramp
30s
Heater
Pump work temp.
8°C
Min. valve open
0,00%
Heater
Pump protection
Set protection
Not active
Stoppage period
7 days
Run time
30s
Tbwtr setpoint
Kp Tbwtr
1.0
Ti Tbwtr
60s
