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When d.h.w. production is carried out with the
RVA 47, it is possible to choose the domestic hot
water priority.
Standard setting: shifting priority (setting 1)
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- Optimum allocation of boilers’ heat output.
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Defines the priority of d.h.w. heating over room heating.
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- Press the line selection buttons to select programming line 127.
- Press the plus / minus buttons to select d.h.w. priority.
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During d.h.w. heating, space heating will be restricted, depending on the setting made.
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Frost protection for the plant is fully active only in the case of setting 2. With setting 0 or
1, it will be partly or fully restricted. If the boiler is correctly sized, frost protection for the
plant is also ensured when using setting 1. In the case of plants where there is a
considerable risk of frost (e.g. plants with outdoor heating), setting 0 should not be
used.
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Increment
1
0
Absolute priority
The controller-internal heating circuit and the heating circuits of other controllers
connected to the LPB will be locked until the d.h.w. is heated up. The primary pump
remains in operation.
1
Shifting priority:
If the capacity of the heat generating equipment is no longer sufficient, the amount of
heat supplied to the heating circuits will be restricted until d.h.w. heating is
terminated.
2
No priority:
D.h.w. heating and space heating at the same time.
In the case of tightly sized boilers and mixing heating circuits, the setpoint may not be
reached if the heating load is great, since too much heat is required for space
heating.
3
Shifting / absolute priority:
If the capacity of the heat generating equipment is no longer sufficient, the pump
heating circuits will be switched off and the amount of heat supplied to the mixing
heating circuits restricted until d.h.w. heating is terminated.
