Danfoss DHP-S&DP, Руководство по установке

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Symbol explanation
11 Compressor start (A1)
12 Auxiliary heater start A2
13 Aux. heater stop (latest by A1)
14 Compressor stop (=0)
15 INTEGRAL A3
16 External auxiliary heater
The calculation of the integral value stops during heat stop. The calculation of the integral value stops when heat
stop has stopped.
In this example INTEGRAL A3 < INTEGRAL A2. This means that the external addition will be activated earlier than the
internal addition. On the condition that these are activated.
11.2.8 HYSTERESIS
In order to start the heat in advance during sudden changes of the heat demand, there is a value, HYSTERESIS, which
controls the difference between the actual supply temperature, t
1
and the calculated supply temperature, t
2
. If the
difference is equal to or greater than the set HYSTERESIS value (x), i.e. there is a heat demand, or the heat demand
disappears, quicker than the usual integral calculation, the integral value is forced to either the start value (-60)
INTEGRAL A1 or to the stop value (0).
1
5
2
8
9
3
4
6
7
Figure 24. Conditions for HYSTERESIS to force the integral value to change.
Position Description
1 Integral
2 Supply temperature
3 t
1
4 t
2
5 Time
6 Compressor stop (0)
7 Compressor start (-60)
8 Hysteresis (Δt) ≥ x
9 Hysteresis (Δt) ≥ x
40 – Installation instructions
VMIFJ102