Water Pump Control
When a circuit is active (in Comfort, Economy, Antifreeze mode), the associated pump in the “Circuit Water Pump Management” section is switched on:PHOTO TBD
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It is possible to enter a delay between the time when the circuit is switched on and the time when the pump is switched on via the parameter Delay ON (seconds); for example, it is possible to enter a delay of a few minutes to allow the header of a manifold to open before the pump is switched on.
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This graph illustrates the relationships between the time when the circuit is switched on/off, the switching on of the pumps, the switching on of the valve and the sources associated with the circuit:PHOTO TBD
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The individual pump is seen as PUMP A and it is possible, if the pump has one, to assign to an input of the REG or its I/O modules the pump block signal of the pump itself and configure it to Water Pump A Input Block (see ANALOG AND DIGITAL INPUT MULTIPLEXER).
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The way these inputs are interpreted, depends on the setting of parameter P. Twin/P. Twin Blk NC.
Note
It is possible to achieve the same result by inverting the digital input Water Pump A Input Block: select REG / IA1 instead of REG IA1, as indicated in the example.PHOTO TBD
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Mixing Valve Control
Each Circuit/Manifold can manage a mixing valve with 3-point or 0/10V control.PHOTO TBD
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0/10 V Valves
In the case of 0/10V valves, the PID output is the valve position!
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For 3-point valves it is possible to consider a shut time to be set on Configuration Page 2, after that the closing relay is also released:PHOTO TBD
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So if the shut time is 60 120 seconds, after this period both the open and closed valve relays will be open, so no more current will flow to the valve.
For both valves, a dead band PID can be considered, which is always set in Configuration 2:PHOTO TBD
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The dead band (delta K) is a range within which no corrections are made to the PID output, essentially ignoring the error. If it is = 0, it is not taken into account.
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If the Temperature Limit on the Circuit Page is not set (=0), but the parameters for overheating control in Configuration 2 are not taken into accountset, once the limit time past the overheating alarm will appear if the circuit is ON! So even if this alarm is not interesting for that specific circuit insert anyway a value different from zero!
Vice versa, if the parameters in Configuration 2 are not set, but the limit temperature is set, the overheating control does not work. All 3 parameters for overheating control must be set, otherwise the alarm will not appear.
Once the overheating alarm is reached, it is not enough for the circuit probe to cool down, the system must also be switched off and on again!PHOTO TBD
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The indicated times are added together, so if 10 seconds is entered for each, if within 30 seconds the temperature does not fall below the maximum allowed, the system will signal an overheating alarm for circuit x.
Warning
The overheating alarm also occurs if the same circuit is called upon to work in both heating and cooling mode at the same time.
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The digital outputs available for the circuits are:
64. Pump A circCirc. 1 - switching on and off the water pump A of manifold 1
65. Valve Open Circ. 1- opening of 3-point mixing valve of circuit 1
66. Valve Close Circ. 1 - closing mixing valve 3 points of circuit 1
67. Pump B Circ. 1 - switching water pump B of circuit 1 on and off
68 to 95 are the same for circuits 2 to 8.PHOTO TBD
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AVAILABLE ANALOGUE OUTPUT
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is the same for circuits 2 to 8.PHOTO TBD
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